HEAVE COMPENSATION SYSTEM FOR ASSEMBLING A DRILL STRING

A method of deploying a jointed tubular string into a subsea wellbore includes lowering the tubular string into the subsea wellbore from an offshore drilling unit. The tubular string has a slip joint. The method further includes, after lowering, anchoring a lower portion of the tubular string below the slip joint to a non-heaving structure. The method further includes, while the lower portion is anchored: supporting an upper portion of the tubular string above the slip joint from a rig floor of the offshore drilling unit; after supporting, adding one or more joints to the tubular string, thereby extending the tubular string; and releasing the upper portion of the extended tubular string from the rig floor. The method further includes: releasing the lower portion of the extended tubular string from the non-heaving structure; and lowering the extended tubular string into the subsea wellbore. 1. A method of deploying a tubular string from an offshore drilling unit into a subsea wellbore , comprising:anchoring a lower portion of the tubular string below a slip joint to a non-heaving structure; supporting an upper portion of the tubular string above the slip joint with a spider of the offshore drilling unit;', 'after supporting, adding one or more joints to the tubular string above the spider, thereby extending the tubular string; and', 'after adding, releasing the upper portion of the extended tubular string from the spider; and, 'while the lower portion is anchoredreleasing the lower portion of the extended tubular string from the non-heaving structure.2. The method of claim 1 , wherein the non-heaving structure is a casing string cemented in the subsea wellbore.3. The method of claim 2 , wherein:the tubular string further has an anchor disposed below the slip joint, andthe lower portion is anchored by setting the anchor against the casing string.4. The method of claim 3 , wherein the tubular string further has a setting tool disposed between the slip joint and the ...

THREE-WAY FLOW SUB FOR CONTINUOUS CIRCULATION

A method for drilling a wellbore includes disposing a tubular string in the wellbore, wherein the tubular string includes a drill bit disposed at a bottom and a flow sub disposed on a top; injecting drilling fluid through a bore valve in the flow sub to rotate the drill bit; moving a sleeve in the flow sub to engage and close the bore valve; moving the sleeve independently from the bore valve to expose a flow port formed through a wall of the flow sub; and injecting the drilling fluid into the flow port while adding a stand to the top of the tubular string, wherein injection of drilling fluid into the tubular string is continuously maintained between drilling and adding the stand to the tubular string. 1. A method for drilling a wellbore , comprising:disposing a tubular string in the wellbore, wherein the tubular string includes a drill bit disposed at a bottom and a flow sub disposed on a top;injecting drilling fluid through a bore valve in the flow sub to rotate the drill bit;moving a sleeve in the flow sub to engage and close the bore valve;moving the sleeve independently from the bore valve to expose a flow port formed through a wall of the flow sub; andinjecting the drilling fluid into the flow port while adding a stand to the top of the tubular string,wherein injection of drilling fluid into the tubular string is continuously maintained between drilling and adding the stand to the tubular string.2. The method of claim 1 , further comprising:after adding the stand to the tubular string, moving the sleeve to close the flow port and open the bore valve; andresuming rotating the drill bit after closing the flow port.3. The method of claim 2 , wherein moving the sleeve comprises operating an actuator.4. The method of claim 3 , further comprising:engaging the tubular string with a clamp before moving the sleeve to expose the flow port;injecting drilling fluid into the flow port via an inlet of the clamp; anddisengaging the clamp from the tubular string after adding ...

THREE-WAY FLOW SUB FOR CONTINUOUS CIRCULATION

A flow sub for use with a drill string includes: a tubular housing having a longitudinal bore formed therethrough and a flow port formed through a wall thereof; a bore valve operable between an open position and a closed position, wherein the bore valve allows free passage through the bore in the open position and isolates an upper portion of the bore from a lower portion of the bore in the closed position; and a sleeve disposed in the housing and movable between an open position where the flow port is exposed to the bore and a closed position where a wall of the sleeve is disposed between the flow port and the bore; and a bore valve actuator operably coupling the sleeve and the bore valve such that opening the sleeve closes the bore valve and closing the sleeve opens the bore valve. 1. A flow sub for use with a drill string , comprising:a tubular housing having a longitudinal bore formed therethrough and a flow port formed through a wall thereof;a bore valve operable between an open position and a closed position, wherein the bore valve allows free passage through the bore in the open position and isolates an upper portion of the bore from a lower portion of the bore in the closed position;a sleeve disposed in the housing and movable between an open position where the flow port is exposed to the bore and a closed position where a wall of the sleeve is disposed between the flow port and the bore; anda bore valve actuator operably coupling the sleeve and the bore valve such that opening the sleeve closes the bore valve and closing the sleeve opens the bore valve.2. The flow sub of claim 1 , wherein the bore valve actuator is operable to close the bore valve after the sleeve is at least partially open and open the bore valve before the sleeve is fully closed.3. The flow sub of claim 2 , wherein:the bore valve comprises a ball, and a cam operably connected to the ball; and', 'a linkage and toggle operably connecting the sleeve and the cam., 'the bore valve actuator ...

DEBURRING MILL TOOL FOR WELLBORE CLEANING

A wellbore cleaning tool for removing irregularities along the inner surface of a wellbore tubular may include a top sub, a cutting assembly, and a bottom sub. The tool is operable to remove irregularities, such as debris, burrs, and jagged edges, along the inside of the wellbore tubular, and thereby provide a clean, inner surface finish. The tool may be actuated into a retracted position, an extended position, and/or a deactivated position. 1. A wellbore tool , comprising:a top sub; a mandrel in fluid communication with the top sub;', 'a piston disposed external to the mandrel;', 'a cutting member selectively movable into at least one of a retracted position and an extended position using the piston; and, 'a cutting assembly comprisinga bottom sub operable to close fluid flow through the tool.2. The tool of claim 1 , wherein the mandrel includes one or more ports to provide fluid communication between a flow bore of the mandrel and the piston.3. The tool of claim 1 , wherein the piston is coupled to the mandrel using one or more releasable members.4. The tool of claim 1 , wherein the piston includes a tapered surface movable into engagement with a tapered surface of the cutting member to move the cutting member into at least one of the retracted position and the extended position.5. The tool of claim 1 , further comprising one or more keys for transmitting torque from the mandrel to at least one of the piston and the cutting member.6. The tool of claim 1 , further comprising a locking member operable to prevent movement of the piston in an opposite direction after the piston moves in a first direction to actuate the cutting member into at least one of the retracted position and the extended position.7. The tool of claim 1 , wherein the bottom sub includes a seat for receiving an extrudable closure member for closing fluid flow through the tool.8. The tool of claim 1 , further comprising one or more biasing members for biasing the cutting member into at least one of ...

ROTATING CONTINUOUS FLOW SUB

A method for drilling a wellbore includes drilling the wellbore by advancing the tubular string longitudinally into the wellbore; stopping drilling by holding the tubular string longitudinally stationary; adding a tubular joint or stand of joints to the tubular string while injecting drilling fluid into a side port of the tubular string, rotating the tubular string, and holding the tubular string longitudinally stationary; and resuming drilling of the wellbore after adding the joint or stand. 1. A method for drilling a wellbore , comprising:drilling the wellbore by rotating a tubular string using a top drive and advancing the tubular string longitudinally into the wellbore;rotationally unlocking an upper portion of the tubular string having a side port from a rest of the tubular string;adding a tubular joint or stand of joints to the upper portion while injecting drilling fluid into the side port and rotating the rest of the tubular string using a rotary table;rotationally locking the upper portion to the rest of the tubular string after adding the joint or stand; andresuming drilling of the wellbore after rotationally locking the upper portion.2. The method of claim 1 , further comprising:opening the port before injecting drilling fluid into the port; andstopping injection of drilling fluid into the port after adding the joint or stand; andclosing the port after stopping injection of drilling fluid into the port.3. The method of claim 2 , further comprising:engaging the tubular string with a clamp before opening the port; anddisengaging the clamp from the tubular string after closing the port.4. The method of claim 3 , wherein the port is opened and closed by operating an electric claim 3 , pneumatic claim 3 , or hydraulic actuator.5. The method of claim 4 , wherein:the actuator is part of the tubular string, andthe clamp provides electrical, hydraulic, or pneumatic power to the actuator.6. The method of claim 5 , wherein the actuator opens and closes the port by ...

SECTION MILL AND METHOD FOR ABANDONING A WELLBORE

A mill for use in a wellbore includes a tubular housing having a bore therethrough, a plurality of pockets formed in a wall thereof, and a blade disposed in each pocket. Each blade includes a body having a first side opposite a second side, wherein the first side faces in a direction of rotation of the mill. The blade also includes a blade portion disposed on the first side of the body, wherein the blade portion has a first cutting face stepped relative to a second cutting face. Each blade is movable between a retracted position and an extended position, wherein a portion of the first side and the second side protrude from the housing in the extended position. 1. A method of milling a tubular in a wellbore , the method comprising: a housing having a longitudinal axis, and', a first arm length oriented substantially parallel to the longitudinal axis, and', 'a first blade;, 'a plurality of first arms coupled to the housing, each first arm having], 'rotating a first mill havingmoving each first arm laterally and longitudinally with respect to the housing from a retracted position to an extended position while each first arm length is maintained substantially parallel to the longitudinal axis;engaging the tubular with the first blades; andcutting through the tubular with the first blades;wherein a lateral first blade sweep dimension is more than fifty percent greater than a nominal outer diameter of the housing.2. The method of claim 1 , further comprising:after cutting through the tubular with the first blades, moving the first mill longitudinally while continuing cutting the tubular with the first blades, thereby creating a window in the tubular.3. The method of claim 2 , further comprising:after creating the window in the tubular, positioning a second mill having a plurality of second arms adjacent the window, each second arm having a second blade;moving each second arm of the second mill from a retracted position to an extended position;engaging the tubular with the ...

MILLING SYSTEM FOR ABANDONING A WELLBORE

A mill for use in a wellbore includes a tubular housing having a bore therethrough and a plurality of eccentrically arranged pockets formed in a wall thereof and an arm disposed in each pocket. Each arm has a body portion and a blade portion extending from an outer surface of the body portion and is movable between an extended position and a retracted position. The mill further includes cutters disposed along each blade portion and a block disposed in each pocket and connected to the housing. Each block has a guide engaged with a mating guide of the respective body portion and an inner passage for providing fluid communication between the housing bore and the respective pocket. The mill further includes an actuator for extending the arms. 1. A mill for use in a wellbore , comprising:a tubular housing having a bore therethrough and a plurality of eccentrically arranged pockets formed in a wall thereof; having a body portion and a blade portion extending from an outer surface of the body portion, and', 'movable between an extended position and a retracted position;, 'an arm disposed in each pocket, each armcutters disposed along each blade portion; a guide engaged with a mating guide of the respective body portion; and', 'an inner passage for providing fluid communication between the housing bore and the respective pocket; and, 'a block disposed in each pocket and connected to the housing, each block havingan actuator for extending the arms.2. The mill of claim 1 , wherein:each block comprises a body and a stop connected thereto for receiving the respective arm in the extended position,each block further has an outer passage for providing fluid communication between the housing bore and the respective stop, andeach arm is operable to close the respective outer passage in the extended position.3. The mill of claim 2 , wherein each block further comprises a jet disposed in each passage.4. The mill of claim 1 , wherein:each block comprises a body and a stop connected ...

CONTINUOUS FLOW DRILLING SYSTEMS AND METHODS

A method for drilling a wellbore includes drilling the wellbore by injecting drilling fluid into a top of a tubular string disposed in the wellbore at a first flow rate and rotating a drill bit. The tubular string includes: the drill bit disposed on a bottom thereof, tubular joints connected together, a longitudinal bore therethrough, a port through a wall thereof, and a sleeve operable between an open position where the port is exposed to the bore and a closed position where a wall of the sleeve is disposed between the port and the bore. The method further includes moving the sleeve to the open position; and injecting drilling fluid into the port at a second flow rate while adding a tubular joint(s) to the tubular string. The injection of drilling fluid into the tubular string is continuously maintained between drilling and adding the joint(s). 1. A continuous flow sub for use with a drill string , comprising:a tubular housing having a longitudinal bore therethrough and a port formed through a wall thereof;a ball valve disposed in the bore; and a body having an outer wall coupled to a portion of the housing wall adjacent to the port and an inner wall connected to the outer wall by a web;', 'a poppet disposed through a bore of the inner wall and movable relative to the body between an open position and a closed position; and', 'a spring biasing the poppet toward the closed position., 'a check valve disposed in the port and comprising2. The continuous flow sub of claim 1 , wherein:the poppet engages a seat formed in an end of the body in the closed position,the poppet extends into the housing bore in the open position, thereby allowing fluid flow through the port and into the bore, andthe poppet moves between the positions in response to differentials between a pressure of the housing bore and an external pressure.3. The continuous flow sub of claim 1 , further comprising a cap fastened to the body and isolating the poppet from the external pressure.4. The continuous ...

HEAVE COMPENSATION SYSTEM FOR ASSEMBLING A DRILL STRING

A method of deploying a jointed tubular string into a subsea wellbore includes lowering the tubular string into the subsea wellbore from an offshore drilling unit. The tubular string has a slip joint. The method further includes, after lowering, anchoring a lower portion of the tubular string below the slip joint to a non-heaving structure. The method further includes, while the lower portion is anchored: supporting an upper portion of the tubular string above the slip joint from a rig floor of the offshore drilling unit; after supporting, adding one or more joints to the tubular string, thereby extending the tubular string; and releasing the upper portion of the extended tubular string from the rig floor. The method further includes: releasing the lower portion of the extended tubular string from the non-heaving structure; and lowering the extended tubular string into the subsea wellbore. 1. A method of deploying a jointed tubular string into a subsea wellbore , comprising:lowering the tubular string into the subsea wellbore from an offshore drilling unit,wherein the tubular string has a slip joint;after lowering, anchoring a lower portion of the tubular string below the slip joint to a non-heaving structure; supporting an upper portion of the tubular string above the slip joint from a rig floor of the offshore drilling unit;', 'after supporting, adding one or more joints to the tubular string, thereby extending the tubular string; and', 'releasing the upper portion of the extended tubular string from the rig floor;, 'while the lower portion is anchoredreleasing the lower portion of the extended tubular string from the non-heaving structure; andlowering the extended tubular string into the subsea wellbore.2. The method of claim 1 , wherein the non-heaving structure is a casing string cemented in the subsea wellbore.3. The method of claim 2 , wherein:the tubular string further has an anchor disposed below the slip joint, andthe lower portion is anchored by setting ...

MILLING SYSTEM FOR ABANDONING A WELLBORE

A mill for use in a wellbore includes a tubular housing having a bore therethrough and a plurality of eccentrically arranged pockets formed in a wall thereof and an arm disposed in each pocket. Each arm has a body portion and a blade portion extending from an outer surface of the body portion and is movable between an extended position and a retracted position. The mill further includes cutters disposed along each blade portion and a block disposed in each pocket and connected to the housing. Each block has a guide engaged with a mating guide of the respective body portion and an inner passage for providing fluid communication between the housing bore and the respective pocket. The mill further includes an actuator for extending the arms. 1. An apparatus for use in a wellbore , comprising:a tubular housing having a bore therethrough and a plurality of eccentrically arranged pockets formed in a wall thereof;an arm disposed in each pocket, each arm movable between an extended position and a retracted position; a guide engaged with a mating guide of the respective body portion;', 'a body and a stop connected thereto for receiving the respective arm in the extended position; and', 'an outer passage for providing fluid communication between the housing bore and the respective stop; and', 'wherein each arm is operable to close the respective outer passage in the extended position., 'a block disposed in each pocket and connected to the housing, each block having2. The apparatus of claim 1 , wherein each arm is configured to engage an outer casing string in the wellbore.3. The apparatus of claim 1 , wherein each arm is configured to extend through a window of an inner casing string in the wellbore.4. The apparatus of claim 1 , wherein each arm includes a body portion and a blade portion claim 1 , the blade portion extending from an outer surface of the body portion.5. The apparatus of claim 2 , wherein each arm includes a pad configured to engage the outer casing string.6. ...

CONTINUOUS FLOW SYSTEM FOR DRILLING OIL AND GAS WELLS

A flow sub for use with a drill string includes a tubular housing having a longitudinal bore therethrough and a flow port through a wall thereof and a ball. The ball is disposed in the housing above the flow port, has a bore therethrough, and is rotatable relative to the housing between an open position where the ball bore is aligned with the housing bore and a closed position where a wall of the ball blocks the housing bore. The flow sub further includes a seat disposed in the housing above the ball for sealing against the ball wall in the closed position and a sleeve disposed in the housing and movable between an open position where the flow port is exposed to the housing bore and a closed position where a wall of the sleeve is disposed between the flow port and the housing bore. 1. A flow sub for use with a drill string , comprising:a tubular housing having a longitudinal bore therethrough and a flow port through a wall thereof;a ball disposed in the housing above the flow port, having a bore therethrough, and rotatable relative to the housing between an open position where the ball bore is aligned with the housing bore and a closed position where a wall of the ball blocks the housing bore;a seat disposed in the housing above the ball for sealing against the ball wall in the closed position; anda sleeve disposed in the housing and movable between an open position where the flow port is exposed to the housing bore and a closed position where a wall of the sleeve is disposed between the flow port and the housing bore.2. The flow sub of claim 1 , further comprisingan actuator operably coupling the sleeve and the ball such that opening the sleeve closes the ball and closing the sleeve opens the ball, the sleeve is longitudinally movable relative to the housing, and', 'the actuator is operable to close the ball after the sleeve is at least partially open and open the ball before the sleeve is fully closed., 'wherein3. The flow sub of claim 2 , wherein the actuator ...

SECTION MILL AND METHOD FOR ABANDONING A WELLBORE

A method for milling a tubular cemented in a wellbore includes deploying a bottomhole assembly (BHA) into the wellbore through the tubular, the BHA comprising a window mill; and extending arms of the window mill and radially cutting through the tubular, thereby forming a window through the tubular, wherein a body portion of each window mill arm engages and stabilizes from an inner surface of the tubular after a blade portion of each window mill arm cuts through the tubular. 1. A mill for use in a wellbore , comprising:a tubular housing having a bore therethrough and a plurality of pockets formed in a wall thereof; having a body portion and a blade portion extending from an outer surface of the body portion, and', 'movable between an extended position and a retracted position;, 'an arm disposed in each pocket, each armcutters disposed along each blade portion to form a radial cutting face and a longitudinal cutting face; anda pad formed or disposed on an exposed portion of the outer surface of each body portion.2. The mill of claim 1 , wherein:an outer surface of each blade portion tapers inwardly, andeach blade portion has a length substantially less than a length of the body portion.3. The mill of claim 1 , wherein:each blade portion has a length corresponding to a length of the body portion, andan outer surface of each blade portion is straight.4. The mill of claim 1 , wherein:the cutters are a first set of cutters,the mill furthers comprises a second set of cutters, andthe cutter sets are staggered.5. The mill of claim 1 , wherein the pockets are eccentrically arranged.6. The mill of claim 1 , wherein the housing has a rib formed in an outer surface thereof at each side of each pocket.7. The mill of claim 1 , further comprising a stop connected to the housing for each arm and operable to limit extension of the arms.8. The mill of claim 1 , further comprising a cover molded into each pocket and operable to prevent cuttings accumulation in the pockets while the ...

Section mill and method for abandoning a wellbore

A mill for use in a wellbore includes a tubular housing having a bore therethrough, a plurality of pockets formed in a wall thereof, and a blade disposed in each pocket. Each blade includes a body having a first side opposite a second side, wherein the first side faces in a direction of rotation of the mill. The blade also includes a blade portion disposed on the first side of the body, wherein the blade portion has a first cutting face stepped relative to a second cutting face. Each blade is movable between a retracted position and an extended position, wherein a portion of the first side and the second side protrude from the housing in the extended position.

HEAVE COMPENSATION SYSTEM FOR ASSEMBLING A DRILL STRING

A method of deploying a jointed tubular string into a subsea wellbore includes lowering the tubular string into the subsea wellbore from an offshore drilling unit. The tubular string has a slip joint. The method further includes, after lowering, anchoring a lower portion of the tubular string below the slip joint to a non-heaving structure. The method further includes, while the lower portion is anchored: supporting an upper portion of the tubular string above the slip joint from a rig floor of the offshore drilling unit; after supporting, adding one or more joints to the tubular string, thereby extending the tubular string; and releasing the upper portion of the extended tubular string from the rig floor. The method further includes: releasing the lower portion of the extended tubular string from the non-heaving structure; and lowering the extended tubular string into the subsea wellbore. 1. A drill string gripper , comprising:a first ram and a second ram, each ram radially movable between an engaged position and a disengaged position and having a die, wherein the die includes a plurality of gripping elements configured to grip an outer surface of a tubular to anchor the tubular when the first and second rams are in the engaged position;a housing having a housing bore therethrough and a cavity for each of the first ram and the second ram;a piston for each ram, each piston connected to the respective ram and operable to move the respective ram between the positions;a cylinder for each ram, each cylinder connected to the housing and receiving the respective piston; anda first bypass passage formed though the first ram, wherein the first bypass passage is a bore through the first ram, the first bypass passage operable to maintain fluid communication between upper and lower portions of the housing bore across the first and second rams in the engaged position.2. The drill string gripper of claim 1 , further comprising a bonnet and a cap for each ram.3. The drill string ...

Rotating continuous flow sub

ROTATING CONTINUOUS FLOW SUB A method for drilling a wellbore (21) includes drilling the wellbore (21) by advancing the tubular string (60) longitudinally into the wellbore (21); stopping drilling by holding the tubular string (60) longitudinally stationary; adding a tubular joint or stand of joints to the tubular string (60) while injecting drilling fluid into a side port (101) of the tubular string (60), rotating the tubular string(60), and holding the tubular string (60) longitudinally stationary; and resuming drilling of the wellbore (21) after adding the joint or stand. (8770801_1):DAH

Section mill and method for abandoning a wellbore

A method for milling a tubular cemented in a wellbore includes deploying a bottomhole assembly (BHA) into the wellbore through the tubular, the BHA comprising a window mill; and extending arms of the window mill and radially cutting through the tubular, thereby forming a window through the tubular, wherein a body portion of each window mill arm engages and stabilizes from an inner surface of the tubular after a blade portion of each window mill arm cuts through the tubular.

Deburring mill tool for wellbore cleaning

A wellbore cleaning tool for removing irregularities along the inner surface of a wellbore tubular may include a top sub, a cutting assembly, and a bottom sub. The tool is operable to remove irregularities, such as debris, burrs, and jagged edges, along the inside of the wellbore tubular, and thereby provide a clean, inner surface finish. The tool may be actuated into a retracted position, an extended position, and/or a deactivated position.

Deburring mill tool for wellbore cleaning

A wellbore cleaning tool for removing irregularities along the inner surface of a wellbore tubular may include a top sub, a cutting assembly, and a bottom sub. The tool is operable to remove irregularities, such as debris, burrs, and jagged edges, along the inside of the wellbore tubular, and thereby provide a clean, inner surface finish. The tool may be actuated into a retracted position, an extended position, and/or a deactivated position.

Rotating continuous flow sub

A method for drilling a wellbore includes drilling the wellbore by advancing the tubular string longitudinally into the wellbore; stopping drilling by holding the tubular string longitudinally stationary; adding a tubular joint or stand of joints to the tubular string while injecting drilling fluid into a side port of the tubular string, rotating the tubular string, and holding the tubular string longitudinally stationary; and resuming drilling of the wellbore after adding the joint or stand.

Milling system for abandoning a wellbore

A mill for use in a wellbore includes a tubular housing having a bore therethrough and a plurality of eccentrically arranged pockets formed in a wall thereof and an arm disposed in each pocket. Each arm has a body portion and a blade portion extending from an outer surface of the body portion and is movable between an extended position and a retracted position. The mill further includes cutters disposed along each blade portion and a block disposed in each pocket and connected to the housing. Each block has a guide engaged with a mating guide of the respective body portion and an inner passage for providing fluid communication between the housing bore and the respective pocket. The mill further includes an actuator for extending the arms.

Continuous flow system for drilling oil and gas wells

A flow sub for use with a drill string includes a tubular housing having a longitudinal bore therethrough and a flow port through a wall thereof and a ball. The ball is disposed in the housing above the flow port, has a bore therethrough, and is rotatable relative to the housing between an open position where the ball bore is aligned with the housing bore and a closed position where a wall of the ball blocks the housing bore. The flow sub further includes a seat disposed in the housing above the ball for sealing against the ball wall in the closed position and a sleeve disposed in the housing and movable between an open position where the flow port is exposed to the housing bore and a closed position where a wall of the sleeve is disposed between the flow port and the housing bore.

Continuous flow system for drilling oil and gas wells

A flow sub for use with a drill string includes a tubular housing having a longitudinal bore therethrough and a flow port through a wall thereof and a ball. The ball is disposed in the housing above the flow port, has a bore therethrough, and is rotatable relative to the housing between an open position where the ball bore is aligned with the housing bore and a closed position where a wall of the ball blocks the housing bore. The flow sub further includes a seat disposed in the housing above the ball for sealing against the ball wall in the closed position and a sleeve disposed in the housing and movable between an open position where the flow port is exposed to the housing bore and a closed position where a wall of the sleeve is disposed between the flow port and the housing bore.

Continuous flow system for drilling oil and gas wells

A flow sub for use with a drill string includes a tubular housing having a longitudinal bore therethrough and a flow port through a wall thereof and a ball. The ball is disposed in the housing above the flow port, has a bore therethrough, and is rotatable relative to the housing between an open position where the ball bore is aligned with the housing bore and a closed position where a wall of the ball blocks the housing bore. The flow sub further includes a seat disposed in the housing above the ball for sealing against the ball wall in the closed position and a sleeve disposed in the housing and movable between an open position where the flow port is exposed to the housing bore and a closed position where a wall of the sleeve is disposed between the flow port and the housing bore.

Deburring mill tool for wellbore cleaning

A wellbore cleaning tool for removing irregularities along the inner surface of a wellbore tubular may include a top sub (110), a cutting assembly (100), and a bottom sub (130). The tool is operable to remove irregularities, such as debris, burrs, and jagged edges, along the inside of the wellbore tubular, and thereby provide a clean, inner surface finish. The tool may be actuated into a retracted position, an extended position, and/or a deactivated position.

Rotating continuous flow sub

flow subset for use with a drill string, continuous flow system, exploration well drilling method and metal tool holder

resumo “subconjunto de fluxo para uso com uma coluna de perfuração, sistema de fluxo contínuo, método para a perfuração de um poço de exploração e suporte de ferramentas metálico” a presente invenção refere-se a um subconjunto de fluxo para uso com uma coluna de perfuração o qual inclui um alojamento tubular tendo uma abertura longitudinal através do mesmo, um portal de fluxo através de uma parede do mesmo e uma esfera. a esfera está disposta no alojamento acima do portal de fluxo, tem uma abertura através da mesma e é rotativa com relação ao alojamento entre uma posição aberta na qual a abertura da esfera está alinhada com a abertura do alojamento e uma posição fechada na qual uma parede da esfera bloqueia a abertura do alojamento. adicionalmente, o subconjunto de fluxo inclui uma sede disposta no alojamento acima da esfera para vedação contra a parede da esfera na posição fechada e uma manga disposta no alojamento e móvel entre uma posição aberta na qual o portal de fluxo é exposto aa abertura do alojamento e uma posição fechada na qual uma parede da manga está disposta entre o portal de fluxo e a abertura do alojamento. ?? ?? ?? ?? 1/1

Rotating continuous flow sub

A method for drilling a wellbore includes drilling the wellbore by advancing the tubular string longitudinally into the wellbore; stopping drilling by holding the tubular string longitudinally stationary; adding a tubular joint or stand of joints to the tubular string while injecting drilling fluid into a side port of the tubular string, rotating the tubular string, and holding the tubular string longitudinally stationary; and resuming drilling of the wellbore after adding the joint or stand.

Section mill and method for abandoning a wellbore

SECTION MILL AND METHOD FOR ABANDONING A WELLBORE A mill for use in a wellbore (116), comprising: a tubular housing (205) having a bore therethrough and a plurality of pockets (207p) formed in a wall thereof; an arm (215r) disposed in each pocket (207p), each arm (215r): having a body portion (216) and a blade portion (217r) extending from an outer surface of the body portion (216), wherein each blade portion (217r) has a length less than a length of the body portion (216), and movable between an extended position and a retracted position; cutters (218) disposed along each blade portion (217r) to form a radial cutting face and a longitudinal cutting face; and a pad (220) formed or disposed on an exposed portion of the outer surface of each body portion (216).

Managed pressure drilling

Embodiments of the present invention include methods and apparatus for dynamically controlling pressure within a wellbore while forming the wellbore. In one aspect, one or more pressure control apparatus are used to maintain desired pressure within the wellbore while drilling the wellbore. In another aspect, pressure is dynamically controlled while drilling using foam to maintain a substantially homogenous foam flow regime within the wellbore annulus for carrying cuttings from the wellbore.

Managed pressure drilling

Embodiments of the present invention include methods and apparatus for dynamically controlling pressure within a wellbore while forming the wellbore. In one aspect, one or more pressure control apparatus are used to maintain desired pressure within the wellbore while drilling the wellbore. In another aspect, pressure is dynamically controlled while drilling using foam to maintain a substantially homogenous foam flow regime within the wellbore annulus for carrying cuttings from the wellbore.

Section mill and method for abandoning a wellbore

Section mill and method for abandoning a wellbore

SECTION MILL AND METHOD FOR ABANDONING A WELLBORE A mill for use in a wellbore (116), comprising: a tubular housing (205); and a plurality of arms (215r) movable without pivoting relative to the tubular housing (205) between a retracted position and an extended position, each arm (215r) having: a body portion (216), a blade portion (217r) extending from an outer surface of the body portion (216), wherein the blade portion (217r) has a length less than a length of the body portion, and a pad (220) formed or disposed on an exposed portion of the outer surface of the body portion (216).

Rotating continuous flow sub

A method for drilling a wellbore includes drilling the wellbore by advancing the tubular string longitudinally into the wellbore; stopping drilling by holding the tubular string longitudinally stationary; adding a tubular joint or stand of joints to the tubular string while injecting drilling fluid into a side port of the tubular string, rotating the tubular string, and holding the tubular string longitudinally stationary; and resuming drilling of the wellbore after adding the joint or stand.

Section mill and method for abandoning a wellbore

A method for milling a tubular cemented in a wellbore includes deploying a bottomhole assembly (BHA) into the wellbore through the tubular, the BHA comprising a window mill; and extending arms of the window mill and radially cutting through the tubular, thereby forming a window through the tubular, wherein a body portion of each window mill arm engages and stabilizes from an inner surface of the tubular after a blade portion of each window mill arm cuts through the tubular.

Section mill and method for abandoning a wellbore

A method for milling a tubular cemented in a wellbore includes deploying a bottomhole assembly (BHA) into the wellbore through the tubular, the BHA comprising a window mill; and extending arms of the window mill and radially cutting through the tubular, thereby forming a window through the tubular, wherein a body portion of each window mill arm engages and stabilizes from an inner surface of the tubular after a blade portion of each window mill arm cuts through the tubular.

Heave compensation system for assembling a drill string

A method of deploying a jointed tubular string into a subsea wellbore includes lowering the tubular string into the subsea wellbore from an offshore drilling unit. The tubular string has a slip joint. The method further includes, after lowering, anchoring a lower portion of the tubular string below the slip joint to a non-heaving structure. The method further includes, while the lower portion is anchored: supporting an upper portion of the tubular string above the slip joint from a rig floor of the offshore drilling unit; after supporting, adding one or more joints to the tubular string, thereby extending the tubular string; and releasing the upper portion of the extended tubular string from the rig floor. The method further includes: releasing the lower portion of the extended tubular string from the non-heaving structure; and lowering the extended tubular string into the subsea wellbore.

Section Mill and Method for Abandoning a Wellbore

A method for milling a tubular cemented in a wellbore includes deploying a bottomhole assembly (BHA) into the wellbore through the tubular, the BHA comprising a window mill; and extending arms of the window mill and radially cutting through the tubular, thereby forming a window through the tubular, wherein a body portion of each window mill arm engages and stabilizes from an inner surface of the tubular after a blade portion of each window mill arm cuts through the tubular.

Section mill and method for abandoning a wellbore

A method for milling a tubular cemented in a wellbore includes deploying a bottomhole assembly (BHA) into the wellbore through the tubular, the BHA comprising a window mill; and extending arms of the window mill and radially cutting through the tubular, thereby forming a window through the tubular, wherein a body portion of each window mill arm engages and stabilizes from an inner surface of the tubular after a blade portion of each window mill arm cuts through the tubular. 1/17 150a 150b 110 142 0 2 2 102 124 114f 18 100- - , 130h 116 FIG. 1

Milling system for abandoning a wellbore

Rotating continuous flow sub

A method for drilling a wellbore includes drilling the wellbore by advancing the tubular string longitudinally into the wellbore; stopping drilling by holding the tubular string longitudinally stationary; adding a tubular joint or stand of joints to the tubular string while injecting drilling fluid into a side port of the tubular string, rotating the tubular string, and holding the tubular string longitudinally stationary; and resuming drilling of the wellbore after adding the joint or stand.

Sektionsfræ ser og fremgangsmåde til at forlade en brøndboring

Section mill and method for abandoning a wellbore

A method for milling a tubular cemented in a wellbore includes deploying a bottomhole assembly (BHA) into the wellbore through the tubular, the BHA comprising a window mill; and extending arms of the window mill and radially cutting through the tubular, thereby forming a window through the tubular, wherein a body portion of each window mill arm engages and stabilizes from an inner surface of the tubular after a blade portion of each window mill arm cuts through the tubular.

Section mill and method for abandoning a wellbore

A mill for use in a wellbore includes a tubular housing having a bore therethrough, a plurality of pockets formed in a wall thereof, and a blade disposed in each pocket. Each blade includes a body having a first side opposite a second side, wherein the first side faces in a direction of rotation of the mill. The blade also includes a blade portion disposed on the first side of the body, wherein the blade portion has a first cutting face stepped relative to a second cutting face. Each blade is movable between a retracted position and an extended position, wherein a portion of the first side and the second side protrude from the housing in the extended position.

Sistema de compensacion de empuje para ensamblar una cadena de perforacion.

Un método para desplegar una cadena tubular articulada en un pozo submarino incluye bajar la cadena tubular en el pozo submarino desde una unidad de perforación de mar adentro. La cadena tubular tiene una junta de deslizamiento. El método además incluye, después de bajar, anclar una porción inferior de la cadena tubular por debajo de la junta de deslizamiento a una estructura de no empuje. El método además incluye, mientras que la porción inferior está anclada: soportar una porción superior de la cadena tubular por encima de la junta de deslizamiento desde un piso de plataforma de la unidad de perforación de mar adentro; después de soportar, añadir una o más juntas a la cadena tubular, extendiendo de este modo la cadena tubular; y liberar la porción superior de la cadena tubular extendida del piso de plataforma. El método además incluye: liberar la porción inferior de la cadena tubular extendida de la estructura de no empuje; y bajar la cadena tubular extendida en el pozo submarino.

Sistema de compensacion de empuje para ensamblar una cadena de perforacion.

Un método para desplegar una cadena tubular articulada en un pozo submarino incluye bajar la cadena tubular en el pozo submarino desde una unidad de perforación de mar adentro. La cadena tubular tiene una junta de deslizamiento. El método además incluye, después de bajar, anclar una porción inferior de la cadena tubular por debajo de la junta de deslizamiento a una estructura de no empuje. El método además incluye, mientras que la porción inferior está anclada: soportar una porción superior de la cadena tubular por encima de la junta de deslizamiento desde un piso de plataforma de la unidad de perforación de mar adentro; después de soportar, añadir una o más juntas a la cadena tubular, extendiendo de este modo la cadena tubular; y liberar la porción superior de la cadena tubular extendida del piso de plataforma. El método además incluye: liberar la porción inferior de la cadena tubular extendida de la estructura de no empuje; y bajar la cadena tubular extendida en el pozo submarino.

Section mill and method for abandoning a wellbore

A method for milling a tubular cemented in a wellbore includes deploying a bottomhole assembly (BHA) into the wellbore through the tubular, the BHA comprising a window mill; and extending arms of the window mill and radially cutting through the tubular, thereby forming a window through the tubular, wherein a body portion of each window mill arm engages and stabilizes from an inner surface of the tubular after a blade portion of each window mill arm cuts through the tubular.

Heave compensation system for assembling a drill string

Subfluxo de três vias para circulação contínua

subfluxo de três vias para circulação contínua. a presente invenção refere-se a um subfluxo para uso com uma coluna de perfuração inclui um alojamento tubular tendo um furo longitudinal formado através do mesmo e de fluxo uma porta de fluxo formada através de uma parede do mesmo; uma válvula de passagem operável entre uma posição aberta e uma posição fechada, em que a válvula de passagem permite três passagens através do furo na posição aberta e isola uma porção superior do furo a partir de uma porção inferior do furo na posição fechada; e uma luva disposta no alojamento e móvel entre uma posição aberta onde a porta de fluxo é exposta ao furo e uma posição fechada onde uma parede da luva está disposta entre a porta de fluxo e o furo; e um atuador de válvula de passagem operável acoplando a luva e a válvula de passagem de modo que ao abrir a luva fecha-se a válvula de passagem e ao fechar a luva abre-se a válvula de passagem.

Three-way flow sub for continuous circulation

A flow sub for use with a drill string includes: a tubular housing having a longitudinal bore formed therethrough and a flow port formed through a wall thereof; a bore valve operable between an open position and a closed position, wherein the bore valve allows free passage through the bore in the open position and isolates an upper portion of the bore from a lower portion of the bore in the closed position; and a sleeve disposed in the housing and movable between an open position where the flow port is exposed to the bore and a closed position where a wall of the sleeve is disposed between the flow port and the bore; and a bore valve actuator operably coupling the sleeve and the bore valve such that opening the sleeve closes the bore valve and closing the sleeve opens the bore valve.

Three-way flow sub for continuous circulation

A flow sub for use with a drill string includes: a tubular housing having a longitudinal bore formed therethrough and a flow port formed through a wall thereof; a bore valve operable between an open position and a closed position, wherein the bore valve allows free passage through the bore in the open position and isolates an upper portion of the bore from a lower portion of the bore in the closed position; and a sleeve disposed in the housing and movable between an open position where the flow port is exposed to the bore and a closed position where a wall of the sleeve is disposed between the flow port and the bore; and a bore valve actuator operably coupling the sleeve and the bore valve such that opening the sleeve closes the bore valve and closing the sleeve opens the bore valve.

Milling system for abandoning a wellbore

A mill for use in a wellbore includes a tubular housing having a bore therethrough and a plurality of eccentrically arranged pockets formed in a wall thereof and an arm disposed in each pocket. Each arm has a body portion and a blade portion extending from an outer surface of the body portion and is movable between an extended position and a retracted position. The mill further includes cutters disposed along each blade portion and a block disposed in each pocket and connected to the housing. Each block has a guide engaged with a mating guide of the respective body portion and an inner passage for providing fluid communication between the housing bore and the respective pocket. The mill further includes an actuator for extending the arms.

Deburring mill tool for wellbore cleaning

A wellbore cleaning tool for removing irregularities along the inner surface of a wellbore tubular may include a top sub, a cutting assembly, and a bottom sub. The tool is operable to remove irregularities, such as debris, burrs, and jagged edges, along the inside of the wellbore tubular, and thereby provide a clean, inner surface finish. The tool may be actuated into a retracted position, an extended position, and/or a deactivated position.

Rotating continuous flow sub

A method for drilling a wellbore includes drilling the wellbore by advancing the tubular string longitudinally into the wellbore; stopping drilling by holding the tubular string longitudinally stationary; adding a tubular joint or stand of joints to the tubular string while injecting drilling fluid into a side port of the tubular string, rotating the tubular string, and holding the tubular string longitudinally stationary; and resuming drilling of the wellbore after adding the joint or stand.