초록 ▼

A hydraulic control system and associated methods provides selective control of operation of multiple well tool assemblies. In a described embodiment, a hydraulic control system includes a control module which has a member that is displaceable to multiple predetermined positions to thereby select fr

A hydraulic control system and associated methods provides selective control of operation of multiple well tool assemblies. In a described embodiment, a hydraulic control system includes a control module which has a member that is displaceable to multiple predetermined positions to thereby select from among multiple well tool assemblies for operation thereof. When the member is in a selected position, an actuator of a corresponding one of the well tool assemblies is placed in fluid communication with a flowpath connected to the control module. When the member is in another selected position, the flowpath is placed in fluid communication with an actuator of another one of the well tool assemblies.

대표청구항 ▼

A hydraulic control system and associated methods provides selective control of operation of multiple well tool assemblies. In a described embodiment, a hydraulic control system includes a control module which has a member that is displaceable to multiple predetermined positions to thereby select fr

A hydraulic control system and associated methods provides selective control of operation of multiple well tool assemblies. In a described embodiment, a hydraulic control system includes a control module which has a member that is displaceable to multiple predetermined positions to thereby select from among multiple well tool assemblies for operation thereof. When the member is in a selected position, an actuator of a corresponding one of the well tool assemblies is placed in fluid communication with a flowpath connected to the control module. When the member is in another selected position, the flowpath is placed in fluid communication with an actuator of another one of the well tool assemblies. ng. 11. The method of claim 10, wherein the surrounding second tubular is a string of production tubing. 12. The method of claim 10, wherein the surrounding second tubular is a sand screen. 13. The method of claim 10, wherein the second surrounding tubular is string of casing. 14. The method of claim 13, wherein the patch has a first elastomeric seal ring circumferentially disposed around the outer surface of the coiled tubing below the point of expansion, and a second elastomeric seal ring circumferentially disposed around the outer surface of the coiled tubing above the point of expansion. 15. The method of claim 14, wherein the wellbore is a live wellbore. 16. The method of claim 13, wherein the slip is positioned at the upper end of the first expansion assembly, and is expanded to engage the inner surface of the coiled tubing when the first expansion assembly is run into the wellbore; the motor is a rotary motor, and is positioned below the slip; and the expander tool is a rotary expander tool. 17. The method of claim 16, wherein the coiled tubing patch engages the surrounding string of casing at a depth of perforations, so as to seal the perforations. 18. The method of claim 16, wherein the coiled tubing patch engages the surrounding string of casing at a depth above and below perforations, so as to straddle the perforations. 19. The method of claim 16, wherein the coiled tubing patch engages the surrounding string of casing at a depth above perforations, so as to support a velocity tube. 20. The method of claim 16, wherein the expander tool is rotated by the motor, and wherein the expander tool comprises an elongated hollow inner body and a plurality of rollers which expand outwardly from the body upon the application of a first amount of hydraulic pressure so as to expand the coiled tubing into frictional engagement with the inner surface of the casing. 21. The method of claim 20, wherein the cutting tool has an elongated hollow inner body, and a plurality of expandable members which expand outwardly from the body upon the application of a second amount of hydraulic pressure which is greater than the first amount of hydraulic pressure, the expandable members having a cutting instrument, and the cutting tool being rotated by the motor. 22. The method of claim 16, further comprising the step of translating the actuated expander tool axially within the wellbore so as to expand the coiled tubing along a desired length, thereby extending the length of the patch. 23. The method of claim 22, wherein the step of translating the actuated expander tool is accomplished by raising the coiled tubing from the surface while the expander tool is actuated. 24. The method of claim 16, wherein the first expansion assembly further comprises a telescoping member below the slip; and the step of translating the actuated expander tool is accomplished by extending the telescoping member while the expander tool is actuated. 25. The method of claim 10, further comprising the step of retrieving the expansion assembly from the wellbore by pulling the severed portion of coiled tubing above the point of severance. 26. The method of claim 25, further comprising the steps of: running a second expansion assembly into the wellbore on a working string, the second expansion assembly being positioned at the lower end of the working string, the second expansion assembly comprising a slip, a rotary motor, and an expander tool; positioning the expander tool of the second expansion assembly adjacent the patch; actuating the expander tool of the second expansion assembly; and translating the expander tool of the second expansion assembly across the entire length of the patch so as to substantially expand the entire length of the patch into frictional engagement with the second surrounding tubular. 27. The method of claim 26, wherein the second surrounding tubular is a string of casing. 28. The method of claim 27, wherein the slip of the f