A sub-surface safety system for hydrocarbon drilling operations is provided and includes at least one casing within a wellbore that extends into a first portion of a formation from the surface of the formation. A shut-in device is positioned in the casing so as to be below the surface of the formati
A sub-surface safety system for hydrocarbon drilling operations is provided and includes at least one casing within a wellbore that extends into a first portion of a formation from the surface of the formation. A shut-in device is positioned in the casing so as to be below the surface of the formation. The well shut-in device defines a device passageway and is operable to sever a drill string extending through the device passageway and form a barrier in the device passageway that restricts wellbore fluids below the barrier from migrating up the casing to the surface.
대표청구항▼
1. A sub-surface safety system for oil and gas wellbores, the system comprising: at least one casing cemented within the wellbore, the casing defining a casing passageway therein;a well shut-in device disposed in the casing passageway, the shut in device defining a shut-in device passageway and comp
1. A sub-surface safety system for oil and gas wellbores, the system comprising: at least one casing cemented within the wellbore, the casing defining a casing passageway therein;a well shut-in device disposed in the casing passageway, the shut in device defining a shut-in device passageway and comprising a mechanism for severing a pipe string disposed in the shut-in device passageway and a mechanism for blocking fluid flow through the shut-in device passageway; andan actuator coupled to the well shut-in device and located outside the wellbore, wherein the actuator is operable to actuate the mechanism for severing and the mechanism for blocking;wherein the actuator is operable to provide a positive pressure to the well shut-in device so as to maintain the mechanism for severing in a first position and the casing passageway adjacent the well shut-in device remains open; andwherein the actuator is a redundant system comprising: a monitoring system communicably coupled to the shut-in device;a control system communicably coupled to the monitoring system; andan electrical system communicably coupled to the monitoring system,wherein the monitoring, control and electrical systems must all be activated in order to activate the shut-in device. 2. The system of claim 1, wherein the mechanism for severing includes a shear ram having at least one shearing member that is operable between a first position in which the shearing member is substantially withdrawn from the shut-in device passageway and a second position in which the shearing member substantially blocks the shut-in device passageway impeding fluid flow therethrough. 3. The system of claim 2, wherein the casing is disposed along a longitudinal axis and the at least one shearing member is disposed along a shearing member axis, wherein the at least one shearing member is positioned in the casing at an angle relative to a longitudinal axis of the casing. 4. The system of claim 1, wherein the mechanism for severing comprises a plurality of shearing members, each of which is pivotally secured within the casing such that the shearing members pivot along a longitudinal axis of the casing, the shearing members being movable between a first position in which the shearing members are substantially withdrawn from the shut-in device passageway and a second position in which the shearing members substantially blocks the shut-in device passageway impeding fluid flow therethrough. 5. The system of claim 1, wherein the mechanism for severing is a chemical cutting agent and the mechanism for blocking is a sealing agent disposed to creating a barrier within the shut-in device passageway of the casing. 6. The system of claim 1, wherein the casing includes a support disposed in the casing passageway of the casing and on which the well shut-in device is mounted. 7. A sub-surface safety system for oil and gas wellbores, the system comprising: a surface casing cemented in the wellbore and extending into a formation from a surface of the formation, the surface casing having a first end adjacent the surface and a second end;a production casing having a first end and a second end and cemented in the wellbore;an intermediate casing cemented in the wellbore between the surface casing and the production casing, wherein at least one of the surface casing, the intermediate casing, and the production casing defines a continuous casing passageway that extends from the surface and into the formation; anda well shut-in device disposed in the intermediate casing, wherein the well shut-in device defines a shut-in device passageway and is positioned below the first end of the surface casing, the well shut in device comprising at least one shearing member disposed to shear a pipe string adjacent the well shut-in device, the shearing member movable between a first position in which the shearing member is substantially withdrawn from the shut-in device passageway and a second position in which the shearing member substantially blocks the shut-in device passageway to impede fluid flow therethrough. 8. The system of claim 7, further comprising: an actuator coupled to the well shut-in device and that located outside the wellbore, wherein the actuator is operable to actuate the shearing member of the well shut-in device. 9. The system of claim 8, wherein the actuator is operable to provide a positive pressure to the well shut-in device so as to maintain the shearing member in the first position. 10. The system of claim 7, wherein the well shut-in device includes a shear ram on which the at least one shearing member is mounted. 11. The system of claim 10, wherein the intermediate casing is disposed along a longitudinal axis and the shear ram member is positioned in the intermediate casing so as to form an angle between the longitudinal axis of the intermediate casing and the shear ram axis. 12. The system of claim 11, wherein the angle is greater than zero degrees and less than ninety degrees. 13. The system of claim 7, wherein the well shut-in device includes a plurality of shearing members, each of which is pivotally secured within the casing and movable between a first position in which the shearing members are substantially withdrawn from the shut-in device passageway and a second position in which the shearing members substantially blocks the shut-in device passageway impeding fluid flow therethrough. 14. The system of claim 7, comprising a pipe string disposed in the casing passageway adjacent the well shut-in device and a blow out preventer positioned above the top of the wellbore and through which the pipe string passes. 15. A method for shutting in a well during a well drilling operations, comprising: cementing at least one casing in a wellbore extending into a formation from a surface of the formation, the wellbore having a first end adjacent the surface and a second end, the casing defining a casing passageway;positioning a well shut-in device within the casing passageway, the well shut-in device defining a shut-in device passageway;positioning a pipe string in the casing passageway so as to pass adjacent the well shut-in device;utilizing the pipe string to drill the wellbore;monitoring the wellbore;wherein the well shut-in device is disposed, based upon monitoring of the wellbore, to sever the pipe string upon the occurrence of a predetermined event and to form a barrier in the shut-in device passageway, so as to block fluid flow through the shut-in device passageway adjacent the well shut-in device. 16. The method of claim 15, further comprising: providing a positive pressure to the well shut-in device to maintain at least one shearing member in a first position in which the shearing member is substantially withdrawn from the shut-in device passageway, the shearing member movable to a second position upon release of the positive pressure in which the shearing members substantially blocks the shut-in device passageway impeding fluid flow therethrough. 17. The method of claim 15, wherein positioning the well shut-in device within the casing passageway of the casing, below the surface of the formation, comprises: disposing at least one shear ram having a shear ram axis in the casing passageway so that the shear ram axis forms an angle with the longitudinal axis of the casing, thereby forming an angle between the shear ram axis and the casing longitudinal axis, wherein the angle is greater than zero degrees and less than ninety degrees. 18. The method of claim 15, further comprising: actuating the well-shut in device to introducing a chemical agent into the casing passageway and to cut a drilling member located in the shut-in device passageway. 19. The method of claim 15, further comprising securing the well shut-in device to the casing. 20. The method of claim 15, wherein the well shut-in device is activated by a redundant actuator. 21. A sub-surface safety system for oil and gas wellbores, the system comprising: at least one casing cemented within the wellbore, the casing defining a casing passageway therein; anda well shut-in device disposed in the casing passageway, the shut in device defining a shut-in device passageway and comprising a mechanism for severing a pipe string disposed in the shut-in device passageway and a mechanism for blocking fluid flow through the shut-in device passageway,wherein the mechanism for severing comprises a shear ram having at least one shearing member that is operable between a first position in which the shearing member is substantially withdrawn from the shut-in device passageway and a second position in which the shearing member substantially blocks the shut-in device passageway impeding fluid flow therethrough, andwherein the casing is disposed along a longitudinal axis and the at least one shearing member is disposed along a shearing member axis, wherein the shearing member axis is positioned at a non-perpendicular angle relative to a longitudinal axis of the casing. 22. A sub-surface safety system for oil and gas wellbores, the system comprising: at least one casing cemented within the wellbore, the casing defining a casing passageway therein; anda well shut-in device disposed in the casing passageway, the shut in device defining a shut-in device passageway and comprising a mechanism for severing a pipe string disposed in the shut-in device passageway and a mechanism for blocking fluid flow through the shut-in device passageway,wherein the mechanism for severing comprises a plurality of shearing members, each of which is pivotally secured within the casing such that the shearing members pivot along a longitudinal axis of the casing, the shearing members being movable between a first position in which the shearing members are substantially withdrawn from the shut-in device passageway and a second position in which the shearing members substantially blocks the shut-in device passageway impeding fluid flow therethrough. 23. A sub-surface safety system for oil and gas wellbores, the system comprising: at least one casing cemented within the wellbore, the casing defining a casing passageway therein; anda well shut-in device disposed in the casing passageway, the shut in device defining a shut-in device passageway and comprising a mechanism for severing a pipe string disposed in the shut-in device passageway and a mechanism for blocking fluid flow through the shut-in device passageway,wherein the mechanism for severing is a chemical cutting agent and the mechanism for blocking is a sealing agent disposed to creating a barrier within the casing passageway of the casing. 24. A sub-surface safety system for oil and gas wellbores, the system comprising: at least one casing cemented within the wellbore, the casing defining a casing passageway therein; anda well shut-in device disposed in the casing passageway, the shut in device defining a shut-in device passageway and comprising a mechanism for severing a pipe string disposed in the shut-in device passageway and a mechanism for blocking fluid flow through the shut-in device passageway,wherein the casing includes a support disposed in the casing passageway of the casing and on which the well shut-in device is mounted.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (14)
Noack Timothy (Dumas TX) Allred Wesley R. (Dallas TX), Ball valve with coiled tubing cutting ability.
Woytek Andrew J. (Allentown PA) Lileck John T. (Tamaqua PA) Steigerwalt Edward J. (Lehighton PA), Method and apparatus for perforating or cutting with a solid fueled gas mixture.
Longbottom James R. ; Gano John C. ; van Petegem Ronald,NOX ; Turner William H.,GBX, Methods of completing a subterranean well and associated apparatus.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.