POSITIONING AND ANCHORING A WELL TOOL

WELL TOOL

WELL TOOL SLEEVE VALVE

GRAVEL PACKING IN A WELL

Subsurface Release Cementing Plug

A subsurface release plug release apparatus comprising a mandrel comprising a bottom plug portion, a top plug portion, a work string attachment portion, a first release portion between the bottom plug portion and the top plug portion, wherein the first release portion comprises a controlled strength segment configured to fail structurally and thereby release the bottom plug portion at a first fluid pressure, and a second release portion between the top plug portion and the work string attachment portion, wherein the second release portion is configured to release the bottom plug portion at a second fluid pressure, wherein the first fluid pressure is less than the second fluid pressure, a bottom plug body disposed about the bottom plug portion of the mandrel, and a top plug body disposed about the top plug portion of the mandrel. 1. A subsurface release plug release apparatus comprising: a bottom plug portion;', 'a top plug portion;', 'a work string attachment portion;', 'a first release portion between the bottom plug portion and the top plug portion, wherein the first release portion comprises a controlled strength segment configured to fail structurally and thereby release the bottom plug portion at a first fluid pressure; and', 'a second release portion between the top plug portion and the work string attachment portion, wherein the second release portion is configured to release the bottom plug portion at a second fluid pressure, wherein the first fluid pressure is less than the second fluid pressure;, 'a mandrel comprisinga bottom plug body disposed about the bottom plug portion of the mandrel; anda top plug body disposed about the top plug portion of the mandrel.2. The subsurface release plug release apparatus of claim 1 , wherein the mandrel is manufactured by a process comprising winding a plurality of fibers around a mandrel template.3. The subsurface release plug release apparatus of claim 1 , wherein the bottom plug body is releasably secured to the ...

Expansion Tool for Non-Cemented Casing-Casing Annulus (CCA) Wellbores

The present invention relates to expansion tools used to centralize a casing-casing annulus in a wellbore. One embodiment provides an elongate body having a first force multiplier case coupled to an expansion tool case. A piston may be arranged within the first force multiplier case and configured to translate axially therein. A ram may be arranged within the expansion tool case, the ram being coupled to the piston and configured to translate axially within the expansion tool case in response to a force applied by the piston. One or more lug assemblies are arranged within the expansion tool case and configured to radially expand once engaged by the ram as the ram translates axially. 1. An expansion tool , comprising:an elongate body having a first force multiplier case coupled to an expansion tool case;a piston arranged within the first force multiplier case and configured to translate axially;a ram arranged within the expansion tool case, the ram being coupled to the piston and configured to translate axially in response to a force applied by the piston; andone or more lug assemblies arranged within the expansion tool case and configured to radially expand once engaged by the ram as the ram translates axially.2. The expansion tool of claim 1 , wherein the ram defines a tapered surface configured to engage a corresponding tapered surface defined on the expansion tool case claim 1 , the corresponding tapered surface being configured to maintain the ram concentrically-disposed within the expansion tool case as the ram translates axially.3. The expansion tool of claim 1 , further comprising one or more lug components arranged on an outer surface of the one or more lug assemblies claim 1 , the one or more lug components being configured to engage and deform an inner surface of a casing as the one or more lug assemblies radially expand.4. The expansion tool of claim 3 , wherein the ram defines a tapered surface configured to engage and radially expand the one or more lug ...

Expansion Tool for Non-Cemented Casing-Casing Annulus (CCA) Wellbores

The present invention relates to expansion tools used to centralize a casing-casing annulus in a wellbore. One embodiment provides a method for centralizing an inner casing within an outer casing that includes introducing an expansion tool into the inner casing. The expansion tool has an elongate body having a first force multiplier case coupled to an expansion tool case. A piston arranged within the first force multiplier case is actuated to move the piston axially in a first direction within the first force multiplier case. The piston engages a ram arranged within the expansion tool, and causes the radial expansion of one or more lug assemblies arranged within the expansion tool case. The inner casing is then plastically deformed with the one or more lug assemblies as they expand radially.

Pressure Activated Down Hole Systems and Methods

Systems and methods for activating a down hole tool in a wellbore. A piston is moveable from a first position to a second position for activating the down hole tool. The piston includes a first side exposed to a first chamber, and a second side exposed to a second chamber. A rupture member has a first side exposed to the first chamber and a second side exposed to a third chamber. The rupture member is configured to rupture when a pressure differential between the first chamber and the third chamber reaches a predetermined threshold value, at which point the rupture member allows fluid communication between the first chamber and the third chamber. When the rupture member is intact, the piston is in the first position, and when the rupture member ruptures, the piston moves to the second position and activates the down hole tool. 1. A system for activating a down hole tool in a wellbore , the system comprising:a piston moveable from a first position to a second position for activating the down hole tool, the piston including a first piston side exposed to a first chamber, and a second piston side exposed to a second chamber; anda rupture member having a first member side exposed to the first chamber and a second member side exposed to a third chamber, the rupture member being configured to prevent fluid communication between the first chamber and the third chamber only until a pressure differential between the first chamber and the third chamber reaches a predetermined threshold value, at which point the rupture member ruptures and allows fluid communication between the first chamber and the third chamber,wherein when the pressure differential is below the threshold value and the rupture member is intact, the piston is in the first position, and wherein when the pressure differential reaches the threshold value and the rupture member ruptures, the piston moves to the second position and activates the down hole tool.2. The system of claim 1 , wherein the piston is ...

RISER DISPLACEMENT AND CLEANING SYSTEMS AND METHODS OF USE

Disclosed are systems and methods of effectively wiping and displacing a deep water riser prior to disconnection from a blowout preventer. An exemplary riser displacement system includes a mandrel coupled to a work string, a seal containment canister arranged about at least a portion of the mandrel, and a seal assembly movable between an un-deployed configuration, where the seal assembly is arranged within the seal containment canister, and a deployed configuration, where the seal assembly is arranged outside of the seal containment canister, the seal assembly including a sleeve movably arranged about the mandrel and one or more sealing elements disposed at a distal end of the sleeve. 1. A riser displacement system , comprising:a mandrel coupled to a work string;a seal containment canister arranged about at least a portion of the mandrel; anda seal assembly movable between an un-deployed configuration, where the seal assembly is arranged within the seal containment canister, and a deployed configuration, where the seal assembly is arranged outside of the seal containment canister, the seal assembly including a sleeve movably arranged about the mandrel and one or more sealing elements disposed at a distal end of the sleeve.2. (canceled)3. The riser displacement system of claim 1 , further comprising a piston bore defined between the sleeve and the mandrel claim 1 , the piston bore being in fluid communication with an interior of the work string via one or more orifices defined in the mandrel.4. The riser displacement system of claim 1 , wherein the one or more sealing elements are movably arranged about an outer radial surface of the mandrel.5. The riser displacement system of claim 4 , wherein claim 4 , when in the deployed configuration claim 4 , the one or more sealing elements sealingly engage an inner radial surface of the riser.6. The riser displacement system of claim 1 , further comprising a lower adapter axially spaced from the seal containment canister and ...

Well completions using casing valves

A well is completed by cementing a casing string in place in the well. A jetting tool assembly is run into the casing string on a tubing string. The jetting tool assembly engages a sliding sleeve of a casing valve and slides the sliding sleeve to an open position uncovering a plurality of housing ports in the casing valve housing in which the sleeve is received. Then, disintegratable plugs are hydraulically jetted from the housing ports to communicate a subsurface formation adjacent the casing valve with an interior of the casing string. Preferably, prior to opening the sleeve and hydraulically jetting the plugs, residual cement is drilled from the casing string, then further residual cement is hydraulically jetted from the casing valve, and then the casing valve is backwashed by reverse circulation.

Reverse cementing float equipment

A regulating valve assembly for regulating fluid flow through a passage, the assembly having: a back-flow valve comprising a seat and a closure element, wherein the closure element engages with the seat in a closed configuration and disengages from the seat in an open configuration; a lock in mechanical communication with the back-flow valve to lock the backflow valve in the open configuration; and a forward-flow valve in mechanical communication with the lock and comprising a seat and a closure element, wherein the closure element engages with the seat in a closed configuration and disengages from the seat in an open configuration.

Well completion method

A well completion method comprising the steps of: (1) positioning a conduit in a wellbore such that (a) a wellbore annulus surrounding the conduit is defined between the conduit and the wall of the wellbore, (b) the wellbore annulus has a first longitudinal segment which is positioned within a producing formation, (c) the wellbore annulus has a second longitudinal segment which is positioned within a producing formation, and (d) the wellbore annulus has a third longitudinal segment which is positioned between the first longitudinal segment and the second longitudinal segment; (2) placing a gravel pack in the wellbore annulus such that the gravel pack surrounds the conduit and substantially fills the first, second, and third longitudinal segments of the wellbore annulus; and (3) injecting a hardenable hydraulic cement composition into the portion of the gravel pack located in the third longitudinal segment of the wellbore annulus such that, after the hydraulic cement composition hardens, the third longitudinal segment of the wellbore annulus is blocked and fluid flow through the third longitudinal segment of the wellbore annulus from the first longitudinal segment to the second longitudinal segment and from the second longitudinal segment to the first longitudinal segment is thereby substantially prevented.

Slim hole stage cementer and method

Apparatus and method for opening perforations in a well casing

An apparatus for opening perforations in a casing string. The casing string has a special casing section defining a plurality of holes therethrough. Rupturable ceramic discs or inserts are disposed in said holes and retained therein. The ceramic discs or inserts are adapted to withstand the fluid differential pressures normally present in the wellbore but are rupturable in response to impact by a mild explosive charge. The explosive charge is provided by detonating a length of det-cord disposed in the casing string adjacent to the holes in the special casing section. A method of perforating using this apparatus is also disclosed.

Cement head and plug

A cement head and casing assembly includes a cement head body having a cement passage defined therethrough. The body is mounted on the well casing and has a lower portion extending down into the casing, with an upper portion extending a relatively short distance above an upper end of the casing. A cement plug is closely received within a bore of the casing below the upper end thereof. The cement plug is releasably connected to the lower portion of the cement head body so that the plug is suspended from the lower por-tion of the cement head body within the casing. The cement plug has a plug passage defined therethrough which is com-municated with a cement passage in the cement head body so that cement can be pumped down through the cement head body and the cement plug into the casing. The passage through the cement plug can be closed and the cement plug can be released from the cement plug body after the cement has been pumped into the casing.

Self-filling cementing collar and method

Slim hole stage cementer and method

A small diameter stage cementer assembly 10 and a hydraulically operated packer collar stage cementer 110, including a cementer housing 12 for interconnection with a casing string 14 positionable in a slim-hole wellbore for a cementing operation. The cementer housing 12 including a seat 11 for receiving a lower, drillable portion 335 of an opening sleeve assembly 135 after the upper drillable portion 235 of the opening sleeve assembly 135 has been drilled out. The lower, drillable portion 335 wedges into engagement with the seat 11 to prevent rotation of the drillable portion 335 during drill-out, such that the lower portion 335 may be drilled up using a small diameter bit and drill string, and accommodating a reduced weight on bit. The packer collar embodiment includes a hydraulically actuatable packer 70. In the packer collar embodiment of the stage cementer 110, cementing ports 34 are provided separate in a separate axial plane from hydraulic inflation ports, such that the secondary opening device or rupture disks may be securely positioned within the cementing ports. Thereby, a relatively thin-walled outer case 20 may be utilized for the hydraulic passageway 130 to the packer 70, without having to increase the case outer diameter to accommodate positioning a rupture disk in the case. The stage cementer housing may be sized for use with a casing string 14 with a nominal OD of4-1/2 inches or less. An improved method of operating a stage cementer is disclosed.

Well cement inflation packer tools and methods

The present invention provides an improved cementing inflation packer tool and methods of using the tool. The tool is comprised of a tubular housing having a packer inflating port disposed therein and a packer inflating port opening sleeve slidably disposed within the housing. The opening sleeve is movable between a closed position and an open position by a first cementing plug. An external packer sleeve having a pressurized fluid inflatable packer element attached thereto and a cementing port therein is sealingly disposed over the outer surface of the housing and the packer inflating port. The external packer sleeve provides a passageway from the packer inflating port to the inflatable packer element and check valve means are disposed in the passageway. A fluid rupturable member having a predetermined rupture pressure is sealingly attached over the cementing port.

Isolation gravel packer

Abstract Of The Disclosure An isolation gravel packer includes a housing which has a stinger receptacle disposed therein. The stinger receptacle has an open upper end and an inner cylindrical seal bore. The inner cylindrical seal bore sealingly receives a concentric inner tubing string therein for delivering a treatment fluid thereto. A treatment fluid passage is disposed laterally through the housing for communicating an interior of the stinger receptacle at an elevation below the seal bore with the well zone to be treated. First and second external seals are disposed on an exterior of the housing above and below the treatment fluid passage, respectively, for sealing between the housing and a liner bore. The housing also includes a combination bypass passage and return fluid passage disposed therein which is iso-lated from the treatment fluid passage. Treatment fluid is flowed from a surface location down through the concentric inner tubing string, then through the treatment fluid passage to the well zone. Return fluid flows from the well zone upward through the combination bypass passage and return fluid passage, then through an annulus between an outer tubing string and the con-centric inner tubing string to the surface location.

Circulating cementing collar and method

An apparatus and method for cementing a casing string in a wellbore. A self-filling tubular cementing collar connected to the lower end of a casing string is provided with one-way flow valving that allows well fluid to enter and self-fill the casing string as it is lowered into the wellbore and automatically prohibits reverse fluid flow from the collar when washing or cementing during forward circulation through the collar. The one-way valving is carried by an axially movable support that can be shifted by a cementing plug moved by pump pressure to permanently seal the entry flow passage after the casing sting is properly positioned in the wellbore.

Self-filling cement sluice and process

Loading cementing darts

In subterranean cementing operations an apparatus and method is useful in loading cementing plugs and darts into tubulars. A method of placing a compressible object having a cross-section within a tubular, includes the steps of: reducing the cross-section of the compressible object (105); placing the compressible object with the reduced cross-section in a tubular (400); and releasing the compressible object within the tubular.

system and method for activating a downhole tool in a wellbore, and, wellbore system.

Sliding sleeve casing tool

Subsurface release cementing plug apparatus and methods

The present invention provides an improved subsurface release cementing plug apparatus for use in a string of pipe during the cementing of the pipe in a well bore. The apparatus comprises a hollow cementing plug seat member adapted to be connected in the string of pipe near the bottom thereof and a cementing plug assembly releasably connectable to a circulation tool or casing running tool in the top of the string of pipe. The cementing plug assembly is comprised of a top cementing plug having an external annular seating surface formed thereon for sealingly engaging a top internal annular seating surface of the cementing plug seat member, and a bottom cementing plug releasably connected to the top cementing plug having an external annular seating surface formed thereon for engaging a bottom internal annular seating surface of the cementing plug seat member.

Short stroke casing valve with positioning and jetting tools therefor

A short stroke casing valve with positioning and jetting tools therefor. The casing valve has a sliding sleeve within a housing. The housing defines a housing communication port therethrough, and a seal is disposed on longitudinally opposite sides of the housing communication port. The sleeve has a selective latch profile therein adapted for engagement by the positioning tool. The positioning tool has outwardly biased positioner blocks which automatically engage the sliding sleeve. The positioner blocks have a selective latch profile thereon which is adapted for engagement with the latch profile in the sliding sleeve. This latch profile in the positioner tool prevents undesirable engagement of the positioner blocks with any other portion of the casing string except the latch profile in the casing valve. In one embodiment, a non-rotational jetting tool includes a plurality of circumferentially spaced jetting orifices therein. There is a sufficient number of orifices so that at least one of the orifices is substantially radially aligned with the housing communication port when longitudinally aligned therewith, so that jetting through the housing communication port may be accomplished without rotation of the tool string. A jetting tool having rotational jetting is also disclosed.

Casing valve

Positioning tool

Abstract Of The Disclosure A positioning tool apparatus for positioning a sliding member of a well tool includes a drag assembly having a longitudinal passageway defined therethrough. An inner mandrel is disposed through the longitudinal passageway of the drag assembly and is longitudinally movable relative to the drag assembly. An operating assembly is provided for selectively operably engaging the sliding member of the well tool in response to longitudinally reciprocating motion of the inner mandrel relative to the drag assembly.

Multiple stage cementer and casing inflation packer

A combination multiple stage cementing tool and casing inflation packer includes an inflatable packer having a packer mandrel and an inflatable packing element disposed about the mandrel. A cementing tool includes a cylindrical outer casing, a cementing port disposed through a side wall of the casing, and a sliding sleeve valve assembly for opening and closing the cementing port. The cylindrical outer casing of the cementing tool is permanently attached to the packer mandrel and has a maximum outer diameter at least as great as a maximum outer diameter of the inflatable packing element when the inflatable packing element is in an uninflated position.

Coiled tubing operated full opening completion tool system

Abstract of the Disclosure A coiled tubing operated full opening completion tool system for use in a well bore. The tool system comprises a completion tool, such as a casing valve, disposed in a well casing. The tool system further comprises a positioner tool for opening and closing a sliding sleeve in the casing valve. A hydraulically actuated operating cylinder section, including opening and closing cylinder sections, is used to actuate the positioner tool to open and close the casing valve sleeve. Hydraulic slips lock the tool in position in the well bore during actuation. The tool further comprises a jetting tool which is hydraulically actuated between an open position thereof in which fluid in the tool is communicated through a jetting nozzle aligned with a port in the casing tool and a closed position. A J-slot and lug are provided in the positioner tool for controlling the longitudinal position thereof during opening and closing of the casing valve sleeve. Another J-slot and lug are provided in the jetting tool for controlling the longitudinal position of a jetting sleeve therein for opening and closing the jetting tool. A spring in the jetting tool biases the jetting sleeve toward its closed position. The tool is specifically designed for, but not limited to, use on coiled tubing.

Apparatus and method for setting a liner by hydraulic pressure

Hydraulic set liner hanger setting mechanism and method

An improved liner hanger setting mechanism is provided. The setting mechanism of the present invention is basically comprised of a tubular pump down plug receptacle having a plug seat defined therein. A cylindrical pump down setting plug having a central flow passage and a rupturable member disposed therein to prevent flow, therethrough is dropped into a work string and the tubular plug receptacle. The pump down setting plug will engage the plug seat and pressure can be increased to the setting pressure required to set a hydraulically actuated liner hanger. The pressure can then be further increased to the rupture pressure of the rupturable member to provide for full bore flow through the pump down setting plug.

Borehole Zementierungswerkzeug

Pressure activated down hole systems and methods

Systems and methods for activating a down hole tool in a wellbore. A piston is moveable from a first position to a second position for activating the down hole tool. The piston includes a first side exposed to a first chamber, and a second side exposed to a second chamber. A rupture member has a first side exposed to the first chamber and a second side exposed to a third chamber. The rupture member is configured to rupture when a pressure differential between the first chamber and the third chamber reaches a predetermined threshold value, at which point the rupture member allows fluid communication between the first chamber and the third chamber. When the rupture member is intact, the piston is in the first position, and when the rupture member ruptures, the piston moves to the second position and activates the down hole tool.

Stage cementing tools for thin holes and process

Casing valve.

A CASING VALVE FOR USE IN A WELL COMPRISES AN OUTER HOUSING (50) HAVING A LONGITUDINAL PASSAGEWAY (52) DEFINED THERETHROUGH AND HAVING A HOUSING WALL (54) WITH A HOUSING COMMUNICATION PORT (56) DEFINED THROUGH SAID HOUSING WALL, SAID HOUSING INCLUDING A FIRST DISINTEGRATABLE PLUG (96) INITIALLY BLOCKING SAID HOUSING COMMUNICATION PORT; AND A SLIDING SLEEVE (66) SLIDABLY DISPOSED IN SAID LONGITUDINAL PASSAGEWAY, SAID SLEEVE HAVING A LONGITUDINAL SLEEVE BORE (90) DEFINED THERETHROUGH AND HAVING A SLEEVE WALL (92) WITH A SLEEVE COMMUNICATION PORT (94) DEFINED THROUGH SAID SLEEVE WALL, SAID SLEEVE INCLUDING A SECOND DISINTEGRATABLE PLUG (8) INITIALLY BLOCKING SAID SLEEVE COMMUNICATION PORT, SAID SLEEVE BEING SELECTIVELY MOVABLE RELATIVE TO SAID HOUSING BETWEEN A FIRST POSITION WHEREIN SAID HOUSING COMMUNICATION PORT AND SAID SLEEVE COMMUNICATION PORT ARE OUT OF REGISTRY WITH EACH OTHER AND SECOND POSITION WHEREIN SAID PORTS ARE IN REGISTRY WITH EACH OTHER. (FIG)

Pressure activated down hole systems and methods.

Sistemas y métodos para activar una herramienta pozo abajo en un pozo de sondeo; un pistón es móvil desde una primera posición a una segunda posición para activar la herramienta pozo abajo; el pistón incluye un primer lado expuesto a una primera cámara, y un segundo lado expuesto a una segunda cámara; un elemento de ruptura tiene un primer lado expuesto a la primera cámara y un segundo lado expuesto a una tercera cámara; el elemento de ruptura está configurado para romperse cuando un diferencial de presión entre la primera cámara y la tercera cámara alcanza un valor de umbral predeterminado, en cuyo punto el elemento de ruptura permite la comunicación de fluido entre la primera cámara y la tercera cámara; cuando el elemento de ruptura está intacto, el pistón queda en la primera posición, y cuando el elemento de ruptura se rompe, el pistón se mueve a la segunda posición y activa la herramienta pozo abajo.

Method and apparatus for gravel packing a well

Abstract Of The Disclosure A system is provided for gravel-packing a zone of a well. An operating string of the system includes a liner hanger setting tool. A liner string is concentrically disposed about the operating string and has its upper end detachably connected to a lower end of the liner hanger setting tool. The liner hanger setting tool includes a rotatable ball valve disposed in a housing bore thereof. The liner string and operating string are lowered together on an outer drill pipe string into the well until a liner hanger of the liner string is located at a desired location. Then the liner hanger is set within the well at a desired location in response to an increase in pressure within the outer tubing string. Then the ball valve of the liner hanger setting tool is opened in response to an increase in pressure within a well annulus. A concentric inner tubing string is lowered through the outer pipe string, then through a ball valve bore of the open ball valve and into operable engagement with an isolation gravel packer of the operating string. Gravel laden slurry is directed down the concentric inner tubing string to a zone to be gravel-packed, and return fluid returns through a tubing annulus between the concentric inner tubing string and the outer tubing string.

Multiple stage cementer and casing inflation packer

Abstract A combination multiple stage cementing tool and casing inflation packer includes an inflatable packer having a packer mandrel and an inflatable packing element disposed about the mandrel A cementing tool includes a cylindrical outer casing, a cementing port disposed through a side wall of the casing, and a sliding sleeve valve assembly for opening and closing the cementing port. The cylindrical outer casing of the cement-ing tool is permanently attached to the packer mandrel and has a maximum outer diameter at least as great as a maximum outer diameter of the inflatable packing element when the inflatable packing element is in an uninflated position.

Method and Plug System for Keeping Separate Liquids Successively Inserted into a Well

Plugger, pluggsystem og fremgangsmåte for bruk av pluggene og pluggsystemet i underjordiske brønner. Pluggene omfatter en indre spindel og en ytre muffe laget av et kompressibelt skummateriale. Pluggsystemet inkluderer en sammenstilling omfattende en øvre plugg og en nedre plugg med ytre muffer av skummateriale. Pluggsystemet omfatter dessuten en flottørventil i hvilken sammenstillingen av plugger passer. Ved fremgangsmåten blir nedre plugg posisjonert i en rørstreng foran øvre plugg for å skille en andre fluid fra en første fluid og stryke innsiden av en rørstreng ren for den første fluid. Den øvre plugg blir brukt til å stryke innsiden av rørstrengen ren for den andre fluid og stoppe fortrengning av den andre fluid inn i ringrommet mellom foringsrør og brønnvegg.

Sub-surface release cementing plug

Etfrigjøringsapparatfor plugger med sub-overflatefrigjøring omfattende en stamme omfattende en nedre pluggandel, en øvre pluggandel, en arbeidsstrengtilknytningsandel, en første frigjøringsandel mellom den nedre pluggandelen og den øvre pluggandelen, hvor den første frigjøringsandelen omfatter et styrkeregulert segment utformet for å svikte strukturelt og med det frigjøre den nedre pluggandelen ved et første fluidtrykk, og en andre frigjøringsandel mellom den øvre pluggandelen og arbeidsstreng-tilknytningsandelen, hvor den andre frigjøringsandelen er utformet for å frigjøre den nedre pluggandelen ved et andre fluidtrykk, hvor det første fluidtrykket er lavere enn det andre fluidtrykket, et bunnplugglegeme anbragt rundt den nedre pluggandelen av stammen, og et topplugglegeme anbragt rundt den øvre pluggandelen av stammen. One sub-surface release device for plugs comprising a stem comprising a lower plug portion, an upper plug portion, a work string attachment portion, a first release portion between the lower plug portion and the upper plug portion, the first release portion comprising a strength-regulated segment designed to fail structure the lower plug portion at a first fluid pressure, and a second release portion between the upper plug portion and the work string attachment portion, the second release portion being designed to release the lower plug portion at a second fluid pressure, wherein the first fluid pressure is lower than the second fluid pressure; a bottom plug body disposed around the lower plug portion of the stem, and a top plug body disposed around the upper plug portion of the stem.

Casing cementer with torque-limiting rotating positioning tool

Abstract Of The Disclosure A casing cementer with torque-limiting rotating positioning tool. The casing cementer comprises a housing with a rotating valve sleeve therein. A positioning tool is used to rotate the valve sleeve between open and closed positions thereof. No reciprocation of the positioning tool is required. The valve sleeve has a sealing ring molded thereto for sealing between the housing and the valve sleeve. The valve sleeve preferably has an inside diameter at least as large as an inside diameter of the casing. A stop is provided to limit movement of the valve sleeve when it reaches either the open or closed position. A clutch in the positioning tool provides for torque-limitation and a ratcheting indication to the operator at the surface when the valve sleeve has been opened or closed.

Methods and apparatus for use in subterranean cementing operations

The present invention relates to subterranean cementing operations, and more particularly to an apparatus useful in loading cementing plugs and darts into tubulars, and methods of using such apparatus in subterranean cementing operations. An example of a method of the present invention is a method of placing a compressible object having a cross-section within a tubular, including the steps of: reducing the cross-section of the compressible object; placing the compressible object with the reduced cross-section in a tubular; and releasing the compressible object within the tubular. Another example of a method of the present invention is a method of reducing the radial cross-section of a compressible object. Other examples of apparatus of the present invention include apparatus for placing a compressible object into a tubular.

Pressure activated down hole systems and methods

Systems and methods for activating a down hole tool in a wellbore. A piston is moveable from a first position to a second position for activating the down hole tool. The piston includes a first side exposed to a first chamber, and a second side exposed to a second chamber. A rupture member has a first side exposed to the first chamber and a second side exposed to a third chamber. The rupture member is configured to rupture when a pressure differential between the first chamber and the third chamber reaches a predetermined threshold value, at which point the rupture member allows fluid communication between the first chamber and the third chamber. When the rupture member is intact, the piston is in the first position, and when the rupture member ruptures, the piston moves to the second position and activates the down hole tool.

Expansion tool for non-cemented casing-casing annulus (CCA) wellbores

Expansion tools used to centralize a casing-casing annulus in a wellbore. Providing an elongate body having a first force multiplier case coupled to an expansion tool case. A piston may be arranged within the first force multiplier case and configured to translate axially therein. A ram may be arranged within the expansion tool case, the ram being coupled to the piston and configured to translate axially within the expansion tool case in response to a force applied by the piston. One or more lug assemblies are arranged within the expansion tool case and configured to radially expand once engaged by the ram as the ram translates axially.

Tool with sliding sleeve for pipework

Method of well completion.

A WELL IS COMPLETED BY CEMENTING A CASING STRING (12) IN PLACE IN THE WELL. A JETTING TOOL ASSEMBLY (44, 46, 48) IS RUN INTO THE CASING STRING ON A TUBING STRING. THE JETTING TOOL ASSEMBLY ENGAGES A SLIDING SLEEVE (66) OF A CASING VALVE (24) AND SLIDES THE SLIDING SLEEVE TO AN OPEN POSITION UNCOVERING A PLURALITY OF HOUSING PORTS (56) IN THE CASING VALVE HOUSING (50) IN WHICH THE SLEEVE IS RECEIVED.THEN, DISINTEGRATABLE PLUGS (96) ARE HYDRAULICALLY JETTED FROM THE HOUSING PORTS TO COMMUNICATE A SUBSURFACE FORMATION ADJACENT THE CASING VALVE WITH AN INTERIOR OF THE CASING STRING. PREFERABLY, PRIOR TO OPENING THE SLEEVE AND HYDRAULICALLY JETTING THE PLUGS, RESIDUAL CEMENT IS DRILLED FROM THE CASING STRING, THEN FURTHER RESIDUAL CEMENT IS HYDRAULICALLY JETTED FROM THE CASING VALVE, AND THEN THE CASING VALVE IS BACKWASHED BY REVERSE CIRCULATION.(FIG.)

Well completions

Brönnsementeringsplugg

Float valve assembly and method

An improved float valve according to the present invention includes a packer 10 for positioning within a joint of the casing C while at the surface of the well, the packer including a float valve receptacle therein for at least partially receiving a float valve. The float valve body includes a valve seat 56 and a valve member 54 is positioned for selective engagement and disengagement with the valve seat. A guide nose 58 may be optionally provided for positioning within the casing joint between the valve body and the pin end of the casing joint. The float valve body may be reliably fixed and sealed to the packer body. After the packer setting operation, the casing joint and the packer and the float valve may then be positioned as an assembly within the well.

Compressible darts and methods for using these darts in subterranean wells

Compressible darts and methods for using these darts in subterranean wells

Fremgangsmåte for å aktivere en plugg i en underjordisk brønn

Pil og tilhørende fremgangsmåte for å aktivere en underjordisk plugg lokalisert i en underjordisk brønn

Compressible darts and methods for using these darts in subterranean wells

Fremgangsmate for a aktivere en plugg i en underjordisk bronn samt pil til bruk ved utforelses av fremgangsmaten

Foreliggende oppfinnelse angår generelt underjordiske brønnkonstruksjoner og mer spesifikt forbedrede piler og fremgangsmåte til bruk av slike piler i underjordiske brønner. Ved en utførelsesform av foreliggende oppfinnelse tilveiebringes en pil for å aktivere en plugg lokalisert i en underjordisk brønn, hvilken pil omfatter et kjernelegeme (10) og et skumlegeme (13) festet til kjernelegemet. Eventuelt kan en elastisk forankring (12) være inkludert, blant annet for å absorbere deformasjon av skumlegemet.

Compressible darts and methods for using these darts in subterranean wells

The present invention relates generally to subterranean well construction, and more particularly, to improved darts and methods of using these darts in subterranean wells. In one embodiment, the present invention provides a dart for activating a plug located within a subterranean well bore, the dart comprising a mandrel (10), and, a foam body (13) attached to the mandrel. Optionally, an elastic tether (12) can be included, inter alia, to absorb the deformation of the foam body.

Compressible darts and methods for using these darts in subterranean walls

A dart for activating a plug located within a subterranean well bore, comprises a mandrel 10, a foam body 13 attached to the mandrel, and an elastic tether 12 attached to both the mandrel and the foam body. (62) Divided Out of 547007

Compressible darts and methods for using these darts in subterranean wells

Compressible darts and methods for using these darts in subterranean wells

A method for activating a plug in a subterranean well bore is disclosed. The method includes the steps of introducing a dart into a receiving configuration within the plug, and applying a differential pressure across the plug to activate the plug. The dart comprises a foam body (13) attached to a mandrel (10).

Fremgangsmåte og pil for å aktivere en underjordisk plugg lokalisert i en underjordisk brønn

Foreliggende oppfinnelse angår generelt underjordiske brønn-konstruksjoner og mer spesifikt forbedrede piler og fremgangsmåte til bruk av slike piler i underjordiske brønner. Ved en utførelsesform av foreliggende oppfinnelse tilveiebringes en pil for å aktivere en plugg lokalisert i en underjordisk brønn, hvilken pil omfatter et kjernelegeme (10) og et skumlegeme (13) festet til kjernelegemet. Eventuelt kan en elastisk forankring (12) være inkludert, blant annet for å absorbere deformasjon av skumlegemet.

Fremgangsmåte og anordning for å modifisere en brönn

En brønnspyleanordnlng (28) for bruk ved frakturering av en brønn (10). Frakturstart tilveiebringes ved å tildanne åpninger gjennom brønnforingsrøret (20) og deretter danne vlfteformede slisser (34A-34D) l formasjonen (24) som omgir fGringsrøret (20). Disse slisser (34A-34D) dannes med en spyleanordnlng (28) som har minst en hydraulisk stråle rettet gjennom åpningen. Anordningen (28) kan svinges omkring stedet hvor åpningen er for å danne slissene, men fortrinnsvis dannes et antall slisser l hovedsak samtidig. Disse vifteformede slisser (34A-34D) omskrives av en vinkel omkring foringsrørets (20) akse som er vesentlig større enn vinkelen som omskriver selve åpningen gjennom hvilken spalten ble dannet. Disse teknikker er spesielt anvendelige for å frakturere det horisontale parti (18) av brønnen, men anordningen (28) kan benyttes til enhver form for brønn.

Komprimerbare pile og fremgangsmåder til anvendelse af disse pile i underjordiske brønde

Riser displacement and cleaning systems and methods of use

Plug systems and methods for using plugs in subterranean formations

Riser displacement and cleaning systems and methods of use

Disclosed are systems and methods of effectively wiping and displacing a deep water riser prior to disconnection from a blowout preventer. An exemplary riser displacement system includes a mandrel coupled to a work string, a seal containment canister arranged about at least a portion of the mandrel, and a seal assembly movable between an un-deployed configuration, where the seal assembly is arranged within the seal containment canister, and a deployed configuration, where the seal assembly is arranged outside of the seal containment canister, the seal assembly including a sleeve movably arranged about the mandrel and one or more sealing elements disposed at a distal end of the sleeve.

Riser displacement and cleaning systems and methods of use

Plug systems and methods for using plugs in subterranean formations

Plug systems and methods for using plugs in subterranean formations

A plug system for separating fluids is successively introduced into a passage comprising: an assembly comprising a plurality of plugs, wherein at least one plug comprises an outer body (11) and a detachable inner mandrel (13) attached to the outer body; and wherein the plurality of plugs (10, 20, 30) are releasably attached to each other. Frangible devices, such as shear pins (51) may be provided to keep the inner mandrel in place. A baffle adapter (40) may be installed in the casing string, with an inner bore designated to sealingly engage at least one of the plugs.

Fremgangsmate for a holde atskilt vaesker som innfores suksessivt i en passasje, samt pluggsystem til bruk ved utforelsen av framgangsmaten

Pluggsystem og plugger for å holde atskilt fluider som suksessivt innføres i en passasje, omfattende en sammenstilling av flere plugger idet minst én plugg omfatter et ytre legeme (11) og en fraskillbar indre spindel (13) festet til det ytre legeme, idet de flere plugger (10, 20, 30) er frigjørbare fra hverandre. Skjøre innretninger så som skjærpinner (51) kan være tilveiebrakt for å holde indre spindel på plass. En muffetilslutning (40) med en indre boring tilpasset til å komme i tettende inngrep med minst én av pluggene kan være anordnet i foringsrøret. Oppfinnelsen angår fremgangsmåte ved bruk av slike plugger og slikt system.

Plug systems and methods for using plugs in subterranean formations

Plug systems and methods for using plugs in subterranean formations

A plug system for separating fluids is successively introduced into a passage comprising: an assembly comprising a plurality of plugs, wherein at least one plug comprises an outer body (11) and a detachable inner mandrel (13) attached to the outer body; and wherein the plurality of plugs (10, 20, 30) are releasably attached to each other. Frangible devices, such as shear pins (51) may be provided to keep the inner mandrel in place. A baffle adapter (not shown) may be installed in the casing string, with an inner bore designated to sealingly engage at least one of the plugs.

Plug systems and methods for using plugs in subterranean formations