Latch position indicator system and method

Latch position indicator systems remotely determine whether a latch assembly is latched or unlatched. The latch assembly may be a single latch assembly or a dual latch assembly. An oilfield device may be positioned with the latch assembly. Non-contact (position), contact (on/off and/or position) and hydraulic (flowmeter), both direct and indirect, embodiments include fluid measurement systems, an electrical switch system, a mechanical valve system, and proximity sensor systems.

Acoustically Controlled Subsea Latching and Sealing System and Method for an Oilfield Device

An acoustic control system wirelessly operates a subsea latching assembly or other subsea device, such as an active seal. The acoustic control system may control a subsea first accumulator to release its stored hydraulic fluid to operate the latch assembly or other subsea device, such as an active seal. An RCD or other oilfield device may be unlatched or latched with the latching assembly. The acoustic control system may have a surface control unit, a subsea control unit, and two or more acoustic signal devices. A valve may allow switching from an umbilical line system to the acoustic control system accumulator. 1. A system for operating a latching assembly used with an oilfield device , comprising:the latching assembly disposed in a housing configured to be positioned below a water surface;a first signal device configured to be disposed below the water surface; anda second signal device coupled with said housing wherein the latching assembly is configured to operate in response to a first signal transmitted from said first signal device to said second signal device.2. The system of claim 1 , wherein said first signal is an acoustic signal.3. The system of claim 1 , further comprising:a first control unit connected with said first signal device; anda second control unit connected with said second signal device and configured to be coupled with said housing, said second signal device configured to receive said first signal from said first signal device to move the latching assembly in response to said first signal.4. The system of claim 3 , further comprising:a first accumulator configured to contain a hydraulic fluid in fluid communication with the latching assembly and coupled with said housing;wherein the latching assembly configured to move using said first accumulator hydraulic fluid communicated to the latching assembly in response to said first signal from said first signal device.5. The system of claim 1 , wherein said housing configured to be disposed with a ...

TACHOMETER FOR A ROTATING CONTROL DEVICE

A rotating control device (RCD) includes: a tubular housing having a flange formed at each end thereof; a stripper seal for receiving and sealing against a tubular; a bearing for supporting rotation of the stripper seal relative to the housing; a retainer for connecting the stripper seal to the bearing; and a tachometer. The tachometer includes a probe connected to the retainer and including: a tilt sensor; an angular speed sensor; an angular acceleration sensor; a first wireless data coupling; and a microcontroller operable to receive measurements from the sensors and to transmit the measurements to a base using the first wireless data coupling. The tachometer further includes the base connected to the housing and including: a second wireless data coupling operable to receive the measurements; and an electronics package in communication with the second wireless data coupling and operable to relay the measurements to an offshore drilling unit. 1. A rotating control device (RCD) for use with an offshore drilling unit , comprising:a tubular housing having a flange formed at each end thereof;a stripper seal for receiving and sealing against a tubular;a bearing for supporting rotation of the stripper seal relative to the housing;a retainer for connecting the stripper seal to the bearing; and [ a tilt sensor;', 'an angular speed sensor;', 'an angular acceleration sensor;', 'a first wireless data coupling; and', 'a microcontroller operable to receive measurements from the sensors and to transmit the measurements to a base using the first wireless data coupling;, 'a probe connected to the retainer and comprising, a second wireless data coupling operable to receive the measurements; and', 'an electronics package in communication with the second wireless data coupling and operable to relay the measurements to the offshore drilling unit., 'the base connected to the housing and comprising], 'a tachometer, comprising2. The RCD of claim 1 , wherein:the stripper seal is an upper ...

WELL FLUID FLOW CONTROL CHOKE

A choke can include a variable flow restrictor, external ports in communication with a flow passage respectively upstream and downstream of the flow restrictor, and sensor(s) in communication with the external ports. A method can include flowing a well fluid through a flow passage in a body of a choke including a variable flow restrictor, measuring a pressure differential between external ports in communication with respective upstream and downstream sides of the flow restrictor, and operating the flow restrictor, thereby varying a restriction to the flow through the flow passage, in response to the measured pressure differential. A well system can include a well fluid pump, a flow choke including a variable flow restrictor operable by an actuator that includes a displaceable stem and a stem seal that isolates the actuator from the well fluid in the flow choke, and a control system that operates the actuator. 1. A flow choke for use with a subterranean well , the flow choke comprising:a variable flow restrictor configured to restrict flow through a flow passage extending through the flow choke;a first external port in communication with the flow passage upstream of the flow restrictor;a second external port in communication with the flow passage downstream of the flow restrictor; andat least one sensor in communication with the first and second external ports.2. The flow choke of claim 1 , in which the at least one sensor comprises first and second pressure sensors claim 1 , the first pressure sensor being in communication with the first external port claim 1 , and the second pressure sensor being in communication with the second external port.3. The flow choke of claim 1 , in which the at least one sensor comprises first and second density sensors claim 1 , the first density sensor being in communication with the first external port claim 1 , and the second density sensor being in communication with the second external port.4. The flow choke of claim 1 , further ...

PURGING FLUID CIRCUITS IN WELLBORE CONTROL DEVICES

The disclosure relates to purging a RCD including a bearing of contaminants with a fluid circuit, the fluid circuit having at least one housing adjacent to the RCD, a first plurality of valves within the bearing, a second plurality of valves within the housing, at least one inlet port located on the RCD, each inlet port being connected to the housing, at least one outlet port located on the RCD, each outlet port being connected to the housing, and a purge outlet in fluid communication with the fluid circuit. 1. An apparatus for purging a RCD containing a bearing with a fluid circuit , the fluid circuit comprising:at least one housing adjacent to the RCD;a first plurality of valves within the bearing;a second plurality of valves within the housing;at least one inlet port located on the RCD, each inlet port being connected to the housing;at least one outlet port located on the RCD, each outlet port being connected to the housing; anda purge outlet in fluid communication with the fluid circuit.2. The apparatus as claimed in claim 1 , further comprising a hydraulic line in fluid communication with the fluid circuit claim 1 , wherein the hydraulic line is routed through the second plurality of valves within the housing.3. The apparatus as claimed in claim 2 , wherein the first plurality of valves within the bearing is in a closed position during purging of the RCD.4. The apparatus as claimed in claim 3 , further comprising:one or more journal regions located between the bearing and the RCD, wherein the journal regions are in fluid communication with the hydraulic line and further wherein the journal regions are configured to capture debris.5. The apparatus as claimed in claim 4 , wherein the one or more inlet ports are in fluid communication with the fluid circuit claim 4 , each inlet port connecting the housing and the journal regions; and further wherein the one or more outlet ports are in fluid communication with the fluid circuit claim 4 , each outlet port connecting ...

Fault-Tolerant Pressure Relief System for Drilling

A fault-tolerant system relieves pressure of fluid flow in a drilling system. Redundant pressure relief valves can open to relieve fluid flow from a discharge outlet of a manifold when over pressurization is detected. A hydraulic arrangement operably connected to the redundant relief valves provides hydraulic motive force in redundant hydraulic circuits respectively to the redundant relief valves. The redundant circuits are cross-connected to one another. Pressure transducers distributed in the hydraulic arrangement measures operational pressures of the hydraulic arrangement. Redundant controllers can both control the hydraulic motive force provided in the redundant circuits respectively to the redundant relief valves to open and close the relief valves in response to the pressure level measurement. 1. An assembly for relieving pressure of fluid flow in a drilling system in response to a pressure level measurement of the drilling system , the assembly comprising:pressure relief valves disposed in fluid communication between the fluid flow and at least one discharge outlet, each of the pressure relief valves operable to open and close fluid communication of the fluid flow with the at least one discharge outlet;hydraulic circuits being cross-connected to one another and being operably connected to the pressure relief valves, the hydraulic circuits providing hydraulic motive force respectively to the pressure relief valves; andcontrollers operably connected to the hydraulic circuits, each of the controllers receiving the pressure level measurement of the drilling system, both of the controllers in a standard condition simultaneously controlling the hydraulic motive force provided in the hydraulic circuits respectively to the pressure relief valves to independently open and close the respective pressure relief valve in response to the pressure level measurement,in response to a first failure condition of either one of the controllers, the other one of the controllers ...

LATCH POSITION INDICATOR SYSTEM AND METHOD

Latch position indicator systems remotely determine whether a latch assembly is latched or unlatched. The latch assembly may be a single latch assembly or a dual latch assembly. An oilfield device may be positioned with the latch assembly. Non-contact (position), contact (on/off and/or position) and hydraulic (flowmeter), both direct and indirect, embodiments include fluid measurement systems, an electrical switch system, a mechanical valve system, and proximity sensor systems. 130-. (canceled)31. An apparatus , comprising:a housing;an oilfield device adapted to be received with the housing; a retainer member configured to be movable between an unlatched position and a latched position, the retainer member configured to be latched in the latched position; and', 'a piston configured to be movable between a first position and a second position, the piston configured to move the retainer member to the latched position when the piston is in the first position and the piston configured to allow the retainer member to move to the unlatched position when the piston is in the second position; and, 'a latch assembly positioned with the housing, comprisinga non-contact latch position indicator sensor positioned with the latch assembly and configured to transmit a signal of the position of the retainer member to a remote location,wherein the latch position indicator sensor comprises a first sensor means for indicating the position of the retainer member,wherein the first sensor means directly measures the position of the retainer member, andwherein the first sensor means is attached with the housing.32. A system for indicating the position of a first retainer member used to latch a housing with a latch device , comprising:the latch device configured to be removably disposed with the housing;the first retainer member configured to be extendable from the latch device to latch the housing;the first retainer member configured to be moveable between a latched position and an ...

OILFIELD DEVICE WITH WIRELESS TELEMETRY

An acoustic control system wirelessly operates a subsea latching assembly or other subsea device, such as an active seal. The acoustic control system may control a subsea first accumulator to release its stored hydraulic fluid to operate the latch assembly or other subsea device, such as an active seal. An RCD or other oilfield device may be unlatched or latched with the latching assembly. The acoustic control system may have a surface control unit, a subsea control unit, and two or more acoustic signal devices. A valve may allow switching from an umbilical line system to the acoustic control system accumulator. 145-. (canceled)46. A method of data transmission from a subsea housing , the method comprising:receiving data at a remote operated vehicle (ROV) panel with the subsea housing, wherein the data is selected from the group consisting of: a) a pressure in the housing, b) a temperature in the housing, c) a flow of fluid in the housing and d) a position of a latching piston in the housing; andcommunicating the data from the ROV panel to a subsea ROV.47. A method , comprising:outputting from a sensor a data signal indicative of a well parameter;wirelessly transmitting the data signal to a location selected from the group consisting of a subsea location and a surface location; andprocessing the data signal at the location.48. The method of claim 46 , further comprising transmitting a hydraulic fluid from the subsea ROV to the ROV panel.49. The method of claim 46 , further comprising transmitting a signal wirelessly from the subsea ROV to the ROV panel.50. The method of claim 46 , wherein the communicating comprises transmitting a signal wirelessly from the ROV panel to the subsea ROV.51. The method of claim 46 , wherein the communicating comprises acoustically transmitting the data.52. The method of claim 46 , further comprising processing the data at a subsea location.53. The method of claim 52 , wherein the subsea location is in the subsea ROV.54. The method of ...

LATCH POSITION INDICATOR SYSTEM AND METHOD

Latch position indicator systems remotely determine whether a latch assembly is latched or unlatched. The latch assembly may be a single latch assembly or a dual latch assembly. An oilfield device may be positioned with the latch assembly. Non-contact (position), contact (on/off and/or position) and hydraulic (flowmeter), both direct and indirect, embodiments include fluid measurement systems, an electrical switch system, a mechanical valve system, and proximity sensor systems. 1. An apparatus , comprising:a housing;an oilfield device adapted to be received with said housing; a retainer member movable between an unlatched position and a latched position, the retainer member latched with the oilfield device in the latched position;', 'a piston movable between a first position and a second position, the piston moving the retainer member to the latched position when the piston is in the first position and the first piston allowing the retainer member to move to the unlatched position when the piston is in the second position; and, 'a latch assembly positioned with said housing, comprisinga latch position indicator system positioned with the latch assembly to indicate the position of retainer member at a remote location.2. The apparatus of claim 1 , wherein the latch position indicator system comprises:a first sensor means for indicating the position of retainer member.3. The apparatus of claim 2 , wherein the latch position indicator system comprises:a second sensor means for indicating the position of retainer member.4. The apparatus of claim 1 , wherein the latch position indicator system comprises:a first fluid means for indicating the position of retainer member.5. The apparatus of claim 1 , wherein said latch position indicator system is non-contact.6. The apparatus of claim 1 , wherein said latch position indicator system is contact.7. The apparatus of claim 1 , wherein said latch position indicator system directly measures the position of the retainer member.8. ...

APPARATUS AND METHOD FOR DATA TRANSMISSION FROM A ROTATING CONTROL DEVICE

The present invention generally relates to an apparatus and a method of transmitting data from a rotating control device. In one aspect, a method of transmitting data from a rotating control device coupled to an offshore drilling unit is provided. The method includes the step of generating data relating to a parameter associated with the rotating control device. The method further includes the step of transmitting the data from a transmitting assembly coupled to the rotating control device to a receiving assembly positioned proximate the transmitting assembly. Additionally, the method includes the step of transmitting the data from the receiving assembly to the offshore drilling unit. In another aspect, a data gathering and transmitting system for use with a rotating control device coupled to an offshore drilling unit is provided. In a further aspect, a method for transmitting data generated in a rotating control device coupled to a riser is provided. 1. A rotating control device (RCD) for use with an offshore drilling unit , comprising:a body having a flange formed at an end thereof for coupling to the offshore drilling unit;a seal assembly for receiving and sealing against a tubular;a bearing assembly for supporting rotation of the seal assembly relative to the body; a fastener disposed in the body; and', 'a piston disposed in a chamber formed in the body and selectively operable to engage the fastener with the bearing assembly; and, 'a releasable connection connecting the bearing assembly to the body and comprising [ a sensing member for measuring one or more parameters selected from a group, consisting of: revolutions per minute (RPM) of the seal assembly, pressure, and temperature;', 'a transmitting antenna; and', 'a module operable to receive the parameters from the sensing member and to transmit the parameters as a radio frequency (RF) signal to a receiving assembly using the transmitting antenna; and, 'a transmitting assembly rotatable with the seal assembly ...

APPARATUS AND METHOD FOR DATA TRANSMISSION FROM A ROTATING CONTROL DEVICE

A rotating control device (RCD) for use with a drilling unit includes a body having a flange formed at an end thereof for coupling to the drilling unit; a seal assembly for receiving and sealing against a tubular; a bearing assembly for supporting rotation of the seal assembly relative to the body; a releasable connection connecting the bearing assembly to the body; a transmitting assembly rotatable with the seal assembly; and a receiving assembly attached to a non-rotating portion of the RCD. 1. A rotating control device (RCD) for use with a drilling unit , comprising:a body having a flange formed at an end thereof for coupling to the drilling unit;a seal assembly for receiving and sealing against a tubular;a bearing assembly for supporting rotation of the seal assembly relative to the body;a releasable connection connecting the bearing assembly to the body; and a sensing member for measuring one or more parameters selected from a group, consisting of: revolutions per minute (RPM) of the seal assembly, pressure, and temperature;', 'a transmitting antenna; and', 'a module operable to receive the parameters from the sensing member and to transmit the parameters as a wireless signal to a receiving assembly using the transmitting antenna; and, 'a transmitting assembly rotatable with the seal assembly and having a receiving antenna operable to receive the wireless signal; and', 'an electronic system in communication with the receiving antenna and operable to communicate the parameters to the drilling unit., 'the receiving assembly attached to a non-rotating portion of the RCD and having2. The RCD of claim 1 , wherein:the seal assembly is a second seal assembly,the RCD further comprises a first seal assembly,the sensing member is in fluid communication with a pathway between the seal assemblies, andone of the measured parameters is pressure between the seal assemblies.3. The RCD of claim 1 , wherein one of the measured parameters is temperature of the bearing assembly.4. ...

WELL FLUID FLOW CONTROL CHOKE

A choke can include a variable flow restrictor, external ports in communication with a flow passage respectively upstream and downstream of the flow restrictor, and sensor(s) in communication with the external ports. A method can include flowing a well fluid through a flow passage in a body of a choke including a variable flow restrictor, measuring a pressure differential between external ports in communication with respective upstream and downstream sides of the flow restrictor, and operating the flow restrictor, thereby varying a restriction to the flow through the flow passage, in response to the measured pressure differential. A well system can include a well fluid pump, a flow choke including a variable flow restrictor operable by an actuator that includes a displaceable stem and a stem seal that isolates the actuator from the well fluid in the flow choke, and a control system that operates the actuator. 124-. (canceled)25. A flow choke for use with a subterranean well , the flow choke comprising:a body;a variable flow restrictor configured to restrict flow through a flow passage extending through the body;an actuator including a stem configured to displace a closure member of the flow restrictor relative to the body;a chamber surrounding the stem; anda sensor in communication with the chamber.26. The flow choke of claim 25 , in which the chamber is positioned internal to an adapter that connects the actuator to the body.27. The flow choke of claim 26 , in which the closure member is slidingly and sealingly received in the adapter.28. The flow choke of claim 25 , in which the sensor detects whether a fluid is present in the chamber.29. The flow choke of claim 25 , in which the sensor detects pressure in the chamber.30. The flow choke of claim 25 , in which a seal isolates the chamber from the flow passage.31. The flow choke of claim 30 , in which the sensor detects fluid leakage past the seal from the flow passage to the chamber.32. The flow choke of claim 25 , ...

Methods and apparatus for forming a lateral wellbore

The present invention discloses and claims methods and apparatus for forming an opening or a window in a downhole tubular for the subsequent formation of a lateral wellbore. In one aspect of the invention, a thermite containing apparatus is run into the wellbore on a wire line and a widow is subsequently formed in casing wall. In another aspect of the invention, the apparatus includes a run-in string or drill stem with a drill bit attached to a lower end thereof. A diverter, like a whipstock is attached temporarily to the drill bit with a mechanically shearable connection. At a lower end of the whipstock, a container is formed and connected thereto. The container is designed to house a predetermined amount of exothermic material at one side thereof adjacent the portion of casing where the window or opening will be formed. A telescopic joint extends between the bottom of the container and an anchor therebelow and the telescopic joint is in an extended position when the apparatus is run into a wellbore. In use, the exothermic material, like thermite is ignited and the window is formed in the casing. The telescopic joint is then caused to move to a second position, locating the whipstock adjacent the newly formed casing window.

Non-explosive two component initiator

Interface for deploying wireline tools with non-electric string

Embodiments of the present invention generally relate to a method and/or apparatus for deploying wireline tools with a non-electric string. In one embodiment, a method of determining a free point of a tubular string stuck in a wellbore includes deploying a tool string in the stuck tubular with a non-electric string. The free point assembly includes a battery, a controller, and a free point tool. The method further includes activating the free point tool by the controller. The free point tool contacts an inner surface of the stuck tubular string. The method further includes applying a tensile force and/or torque to the stuck tubular string; and measuring a response of the tubular string with the free point tool.

Tachometer for a rotating control device

A rotating control device (RCD) includes: a tubular housing having a flange formed at each end thereof; a stripper seal for receiving and sealing against a tubular; a bearing for supporting rotation of the stripper seal relative to the housing; a retainer for connecting the stripper seal to the bearing; and a tachometer. The tachometer includes a probe connected to the retainer and including: a tilt sensor; an angular speed sensor; an angular acceleration sensor; a first wireless data coupling; and a microcontroller operable to receive measurements from the sensors and to transmit the measurements to a base using the first wireless data coupling. The tachometer further includes the base connected to the housing and including: a second wireless data coupling operable to receive the measurements; and an electronics package in communication with the second wireless data coupling and operable to relay the measurements to an offshore drilling unit.

Inflation tool with real-time temperature and pressure probes

Embodiments of the present invention generally provide a method, apparatus, and system for monitoring conditions in wellbore in real time prior to setting an inflatable element in the wellbore. The inflatable element is inflated with an inflation tool run on a cable with one or more electrically conductive wires (the cable is commonly referred to as a “wireline”). One or more sensors, internal or external to the inflation tool, are monitored before setting the inflatable element to verify well conditions are compatible with the inflatable element. The sensors may be internal or external to the inflation tool.

Slickline power control interface

Embodiments of the present invention generally provide an apparatus, method, and system for operating an electric downhole tool on a non-conductive support line (slickline) by converting a battery voltage to an output voltage suitable for operating the tool. In response to receiving a trigger signal, the output voltage signal is applied to the tool. The tool is controlled by varying the output voltage signal according to a power control sequence. Accordingly, electric tools typically requiring surface intervention by an operator via an electric cable (wireline) may be operated on slickline.

Non-explosive two-component initiator

Inflation tool with real-time temperature and pressure probes

Embodiments of the present invention generally provide a method, apparatus, and system for monitoring conditions in wellbore (130) in real time prior to setting an inflatable element (112) in the wellbore. The inflatable element is inflated with an inflation tool (114) run on a cable with one or more electrically conductive wires (122) (the cable is commonly referred to as a "wireline" (120)). One or more sensors (118), internal or external to the inflation tool, are monitored before setting the inflatable element to verify well conditions are compatible with the inflatable element. The sensors may be internal or external to the inflation tool.

Well fluid flow control choke

A choke can include a variable flow restrictor, external ports in communication with a flow passage respectively upstream and downstream of the flow restrictor, and sensor(s) in communication with the external ports. A method can include flowing a well fluid through a flow passage in a body of a choke including a variable flow restrictor, measuring a pressure differential between external ports in communication with respective upstream and downstream sides of the flow restrictor, and operating the flow restrictor, thereby varying a restriction to the flow through the flow passage, in response to the measured pressure differential. A well system can include a well fluid pump, a flow choke including a variable flow restrictor operable by an actuator that includes a displaceable stem and a stem seal that isolates the actuator from the well fluid in the flow choke, and a control system that operates the actuator.

Inflation tool with real-time temperature and pressure probes

Embodiments of the present invention generally provide a method, apparatus, and system for monitoring conditions in wellbore (130) in real time prior to setting an inflatable element (112) in the wellbore. The inflatable element is inflated with an inflation tool (114) run on a cable with one or more electrically conductive wires (122) (the cable is commonly referred to as a "wireline" (120)). One or more sensors (118), internal or external to the inflation tool, are monitored before setting the inflatable element to verify well conditions are compatible with the inflatable element. The sensors may be internal or external to the inflation tool.

Latch position indicator system and method

Latch position indicator systems remotely determine whether a latch assembly is latched or unlatched. The latch assembly may be a single latch assembly or a dual latch assembly. An oilfield device may be positioned with the latch assembly. Non-contact (position), contact (on/off and/or position) and hydraulic (flowmeter), both direct and indirect, embodiments include fluid measurement systems, an electrical switch system, a mechanical valve system, and proximity sensor systems.

Well fluid flow control choke

A choke can include a variable flow restrictor, external ports in communication with a flow passage respectively upstream and downstream of the flow restrictor, and sensor(s) in communication with the external ports. A method can include flowing a well fluid through a flow passage in a body of a choke including a variable flow restrictor, measuring a pressure differential between external ports in communication with respective upstream and downstream sides of the flow restrictor, and operating the flow restrictor, thereby varying a restriction to the flow through the flow passage, in response to the measured pressure differential. A well system can include a well fluid pump, a flow choke including a variable flow restrictor operable by an actuator that includes a displaceable stem and a stem seal that isolates the actuator from the well fluid in the flow choke, and a control system that operates the actuator.

Electric power control for slickline operations in wellbores

Interface for deploying wireline tools with non-electric string

Embodiments of the present invention generally relate to a method and/or apparatus for deploying wireline tools with a non-electric string. In one embodiment, a method of determining a free point of a tubular string stuck in a wellbore includes deploying a tool string in the stuck tubular with a non- electric string. The free point assembly includes a battery, a controller, and a free point tool. The method further includes activating the free point tool by the controller. The free point tool contacts an inner surface of the stuck tubular string. The method further includes applying a tensile force and/or torque to the stuck tubular string; and measuring a response of the tubular string with the free point tool.

Purging fluid circuits in wellbore control devices

The disclosure relates to purging a RCD including a bearing of contaminants with a fluid circuit, the fluid circuit having at least one housing adjacent to the RCD, a first plurality of valves within the bearing, a second plurality of valves within the housing, at least one inlet port located on the RCD, each inlet port being connected to the housing, at least one outlet port located on the RCD, each outlet port being connected to the housing, and a purge outlet in fluid communication with the fluid circuit.

Non-explosive two component initiator

Methods and apparatus for detonating explosives or igniting flammables are disclosed. According to some embodiments of the invention, initiators include an initiating component holding an exploding bridgewire (EBW) or an exploding foil initiator (EFI) and a flammable component housing thermite. An end of the flammable component mates with a corresponding end of the initiating component. A method of initiating the explosives or flammables includes connecting the two components to assemble the initiator, disposing the initiator proximate the explosives or flammables, and activating the initiator to cause ignition of the thermite that then initiates the explosives or flammables. Additionally, a non-explosive kit for the initiator includes the two components with the EBW or EFI initially spaced from the thermite within the flammable component to make the initiator disarmed until final assembly thereof. Cutting torches and perforating guns provide examples of downhole tools that benefit from aspects of the invention.

sistema de alívio de pressão tolerante a falhas para perfuração

Um sistema tolerante a falhas alivia a pressão de fluxo de fluido em um sistema de perfuração. Válvulas redundantes de alivio de pressão podem abrir para aliviar fluxo de fluido a partir de uma saída de descarga de um plano de válvula quando é detectada sobrepressurização. Um dispositivo hidráulico conectado operativamente às válvulas de alivio redundantes fornece uma força motriz hidráulica em circuitos hidráulicos redundantes respectivamente às válvulas de alivio redundantes. Os circuitos redundantes estão conectados uns aos outros. Transdutores de pressão distribuídos no dispositivo hidráulico medem pressões operacionais do dispositivo hidráulico. Controladores redundantes podem ambos controlar a força motriz hidráulica fornecida nos circuitos redundantes respectivamente às válvulas de alívio redundantes para abrir e fechar as válvulas de alívio em resposta à medição de nível de pressão.

Fault-tolerant pressure relief system for drilling

A fault-tolerant system relieves pressure of fluid flow in a drilling system. Redundant pressure relief valves can open to relieve fluid flow from a discharge outlet of a manifold when over pressurization is detected. A hydraulic arrangement operably connected to the redundant relief valves provides hydraulic motive force in redundant hydraulic circuits respectively to the redundant relief valves. The redundant circuits are cross-connected to one another. Pressure transducers distributed in the hydraulic arrangement measures operational pressures of the hydraulic arrangement. Redundant controllers can both control the hydraulic motive force provided in the redundant circuits respectively to the redundant relief valves to open and close the relief valves in response to the pressure level measurement.

Apparatus and method for data transmission from a rotating control device

A rotating control device (RCD) for use with a drilling unit includes a body having a flange formed at an end thereof for coupling to the drilling unit; a seal assembly for receiving and sealing against a tubular; a bearing assembly for supporting rotation of the seal assembly relative to the body; a releasable connection connecting the bearing assembly to the body; a transmitting assembly rotatable with the seal assembly; and a receiving assembly attached to a non-rotating portion of the RCD.