초록 ▼

An apparatus for facilitating the connection of tubulars using a top drive, the apparatus comprising a supporting member (13 ) connectable to said top drive (3) characterized in that it further comprises an internal tool (30) for engaging said tubular (7) and an external clamping device (39) for eng

An apparatus for facilitating the connection of tubulars using a top drive, the apparatus comprising a supporting member (13 ) connectable to said top drive (3) characterized in that it further comprises an internal tool (30) for engaging said tubular (7) and an external clamping device (39) for engaging said tubular (7).

대표청구항 ▼

What is claimed is: 1. A clamping apparatus for use with a top drive for gripping and turning a drill string formed of pipe, the clamping apparatus comprising: gripping members positioned to grip and support the pipe; a drive member for moving the gripping members radially inwardly into a pipe gri

What is claimed is: 1. A clamping apparatus for use with a top drive for gripping and turning a drill string formed of pipe, the clamping apparatus comprising: gripping members positioned to grip and support the pipe; a drive member for moving the gripping members radially inwardly into a pipe gripping position and radially outwardly to a pipe releasing position; and an attachment member for connecting the clamping apparatus to the top drive for wellbore drilling, wherein the clamping apparatus is rotatable by the top drive. 2. The clamping apparatus of claim 1, wherein the drive member includes a hydraulic system. 3. The clamping apparatus of claim 1, further comprising a stabbing spear extending out between the gripping members and formed to fit within the pipe to be gripped by the clamping apparatus. 4. The clamping apparatus of claim 3, wherein the stabbing spear includes a drilling fluid conduit for conducting a flow of drilling fluid from the top drive. 5. The clamping apparatus of claim 3, wherein the stabbing spear includes a seal adapted to seal between the stabbing spear and the pipe to be gripped. 6. The clamping apparatus of claim 1, further comprising a drilling fluid conduit for conducting a flow of drilling fluid from the top drive. 7. The clamping apparatus of claim 1, wherein the pipe comprises casing. 8. The clamping apparatus of claim 7, wherein the drive member includes a hydraulic system. 9. The clamping apparatus of claim 7, further comprising a stabbing spear extending out between the gripping members and formed to fit within the pipe to be gripped by the clamping apparatus. 10. The clamping apparatus of claim 1, wherein the gripping members are adapted to transfer torque to the pipe. 11. A gripping apparatus for use in connection with a top drive assembly, comprising: a housing defining a central passageway sized for receipt of a tubular, the housing being coupled to the top drive assembly for rotation therewith; a plurality of gripping elements disposed within the housing and displaceable between disengaged and engaged positions; and a powered system adapted to selectively drive the plurality of gripping members between the disengaged and engaged positions. 12. The gripping apparatus of claim 11, wherein the powered system comprises a hydraulic system. 13. The gripping apparatus of claim 11, wherein the plurality of gripping members are moved radially when displaced between the disengaged and engaged positions. 14. The gripping apparatus of claim 11, wherein the tubular comprises casing. 15. The gripping apparatus of claim 14, wherein the plurality of gripping members are moved radially when displaced between the disengaged and engaged positions. 16. The gripping apparatus of claim 11, wherein the housing is coupled to a drive shaft of the top drive assembly. 17. The gripping apparatus of claim 11, wherein the plurality of gripping members are adapted to engage an exterior portion of the tubular. 18. A clamping apparatus for use with a top drive for gripping and turning a drill string formed of pipe, the clamping apparatus comprising: gripping members positioned to grip and support the pipe; a drive member for moving the gripping members radially inwardly into a pipe gripping position and radially outwardly to a pipe releasing position; an attachment member for connecting the clamping apparatus to the top drive for wellbore drilling; and a stabbing spear extending out between the gripping members and formed to fit within the pipe to be gripped by the clamping apparatus. 19. The clamping apparatus of claim 18, wherein the stabbing spear includes a drilling fluid conduit for conducting a flow of drilling fluid from the top drive. 20. The clamping apparatus of claim 18, wherein the stabbing spear includes a seal adapted to seal between the stabbing spear and the pipe to be gripped. 21. The clamping apparatus of claim 18, wherein the drive member includes a hydraulic system. 22. The clamping apparatus of claim 18, wherein the gripping members are adapted to transfer torque to the pipe. 23. A clamping apparatus for use with a top drive for gripping and turning a drill string formed of casing, the clamping apparatus comprising: gripping members positioned to grip and support the casing; a drive member for moving the gripping members radially inwardly into a casing gripping position and radially outwardly to a casing releasing position; an attachment member for connecting the clamping apparatus to the top drive for wellbore drilling; and a stabbing spear extending out between the gripping members and formed to fit within the casing to be gripped by the clamping apparatus. 24. The clamping apparatus of claim 23, wherein the stabbing spear includes a drilling fluid conduit for conducting a flow of drilling fluid from the top drive. 25. The clamping apparatus of claim 23, wherein the stabbing spear includes a seal adapted to seal between the stabbing spear and the casing to be gripped. 26. The clamping apparatus of claim 23, further comprising a drilling fluid conduit for conducting a flow of drilling fluid from the top drive. 27. The clamping apparatus of claim 23, wherein the drive member includes a hydraulic system. 28. The clamping apparatus of claim 23, wherein the gripping members are adapted to transfer torque to the casing. 29. A method for gripping and turning a tubular using a top drive, comprising: coupling a gripping apparatus to the top drive, the gripping apparatus having radially movable gripping elements adapted to engage the tubular; actuating the gripping elements to engage the tubular; inserting a fluid conduit into the tubular; and rotating the top drive, thereby rotating the tubular. 30. The method of claim 29, wherein actuating the gripping elements comprises moving the gripping elements radially. 31. The method of claim 30, wherein the gripping elements are actuated using a hydraulic fluid. 32. The method of claim 30, further comprising transferring torque to the tubular. 33. The method of claim 29, wherein the gripping elements are actuated using a hydraulic fluid. 34. The method of claim 29, further comprising transferring torque to the tubular. 35. The method of claim 29, wherein the fluid conduit comprises a gripping tool. 36. The method of claim 29, wherein the tubular comprises casing. 37. A clamping apparatus for use with a top drive for gripping and turning a drill string formed of casing, the clamping apparatus comprising: gripping members positioned to grip and support the casing; a drive member for moving the gripping members radially inwardly into a casing gripping position and radially outwardly to a casing releasing position; an attachment member for connecting the clamping apparatus to the top drive for wellbore drilling; and a drilling fluid conduit for conducting a flow of drilling fluid from the top drive. 38. A clamping apparatus for use with a top drive for gripping and turning a drill string formed of casing, the clamping apparatus comprising: gripping members positioned to grip and support the casing; a drive member for moving the gripping members radially inwardly into a casing gripping position and radially outwardly to a casing releasing position; and an attachment member for connecting the clamping apparatus to the top drive for wellbore drilling, wherein the drive member includes a hydraulic system.