Automatic false rotary

• US 7,314,090 B2
• Filed: 09/20/2004
• Issued: 01/01/2008
• Est. Priority Date: 09/19/2003
• Status: Active Grant

• Current Assignee: Weatherford Technology Holdings, LLC (Weatherford International PLC)
• Original Assignee: Weatherford/Lamb Incorporated (Weatherford International PLC)
• Inventors: Hayes, Michael, Wiens, Jim, Thomas, Allen Keith Jr.
• Primary Examiner(s): Bagnell; David
• Assistant Examiner(s): Harcourt; Brad
• Application Number:
  US10/945,544
• Publication Number:
  US 20060027375A1
• Time in Patent Office: 1,198 Days
• Field of Search: 166/77.1, 166/77.51, 166/85.1, 166/78.1, 166/98, 166/378, 166/379, 166/380
• US Class Current: 166/380
• CPC Class Codes: E21B 19/06 Elevators, i.e. rod- or tube-gripping devices
• CPC Class Codes: E21B 19/16 Connecting or disconnecting pipe couplings or joints E21B19/20 takes precedence
• CPC Class Codes: E21B 3/04 Rotary tables

Abstract

A method and apparatus for remotely performing a pipe handling operation is provided. In one aspect, the method and apparatus includes a false rotary table capable of supporting one or more tubulars during the pipe handling operation which is moveable between a position for landing one or more tubulars to a position for running one or more tubulars into a wellbore. In another aspect, the present invention provides a method and apparatus for remotely connecting elevator links alternatingly between interchangeable elevators which are capable of axially engaging one or more tubulars above the wellbore.

Claims

1. An apparatus for handling tubulars, comprising:

at least two elevators for engaging one or more tubular sections, the at least two elevators interchangeable to support one or more tubular sections above a wellbore and to lower the one or more tubular sections into the wellbore;

elevator links attachable to each elevator, wherein the elevator links are remotely transferable between the at least two elevators; and

a link spreading assembly attaching the elevator links to one another, wherein the link spreading assembly is configured to remotely extend a distance between the elevator links in order to transfer the elevator links between the at least two elevators.

2. The apparatus of claim 1, further comprising a false rotary table remotely moveable between a landing position for supporting one or more tubular sections above a wellbore using at least one of the at least two elevators and a running position for lowering the one or more tubular sections into the wellbore.

3. The apparatus of claim 2, further comprising a piston and cylinder assembly for remotely moving the false rotary table from the landing position to the running position.

4. The apparatus of claim 2, wherein moving the false rotary table to the landing position provides a narrowed hole in the false rotary table for supporting the one or more tubular sections.

5. The apparatus of claim 4, wherein the false rotary table comprises at least two sliding plates moveable into engagement with one another to form the narrowed hole.

6. The apparatus of claim 5, wherein the false rotary table further comprises a base plate having a hole therein exposable upon movement of the sliding plates away from one another into the running position, the hole larger in diameter than the narrowed hole.

7. The apparatus of claim 1, wherein the link spreading assembly is a piston extendable from a cylinder to release the elevator links from at least one of the at least two elevators.

8. The apparatus of claim 1, wherein each elevator comprises elevator link retainer assemblies which are remotely actuated to alternately retain the elevator links with the elevator and release the elevator links from at least one of the at least two elevators.

9. The apparatus of claim 8, wherein the elevator links are lockable to the elevator within the elevator link retainer assemblies.

10. The apparatus of claim 9, wherein the elevator link retainer assemblies are lockable by biasing force of a resilient member.

11. The apparatus of claim 8, wherein the elevator links are releasable by a force exerted by the elevator links on the elevator link retainer assemblies.

12. The apparatus of claim 1, wherein each elevator has a bore therethrough having a diameter less than an outer diameter of a shoulder of the one or more tubular sections to axially engage the one or more tubular sections below the shoulder.

13. The apparatus of claim 1, further comprising a top drive attached to the opposite ends of the elevator links from the at least two elevators, wherein the elevator links are remotely pivotable from the top drive so that the at least two elevators are capable of axially engaging one or more tubular sections located away from the wellbore.

14. A method of remotely transferring elevator links between at least two elevators, comprising:

providing elevator links attachable interchangeably to a first elevator and a second elevator, wherein each elevator link comprises a body with a link retainer at a lower end thereof;

detaching the elevator links from the first elevator by remotely exerting a force on the body of the each elevator link thereby extending a distance between the elevator links, and

attaching the elevator links to the second elevator by retracting the distance between the elevator links.

15. The method of claim 14, wherein attaching the elevator links to the second elevator further comprises remotely moving elevator link retainer latches to retain elevator link retainers with lifting ears of the elevator.

16. The method of claim 14, wherein detaching the elevator links from the first elevator further comprises remotely moving elevator link retainer latches to permit elevator link retainers to move outward relative to the lifting ears of the first elevator.

17. The method of claim 14, wherein pressurized fluid introduced from a remote location from a link spreading apparatus extends the link spreading apparatus, thereby exerting the force on the body of each elevator link.

18. The method of claim 17, wherein the link spreading apparatus comprises a piston extendable from a cylinder.

19. The method of claim 14, further comprising locking the elevator links to the second elevator.

20. The method of claim 19, wherein locking the elevator links comprises lifting the second elevator from a surface.

21. The method of claim 14, further comprising unlocking the elevator links from the first elevator.

22. The method of claim 21, wherein unlocking the elevator links comprises placing the first elevator into contact with a surface.

23. The method of claim 14, wherein detaching the elevator links comprises forcing the elevator links against elevator link retainer assemblies retaining the elevator links with the first elevator by remotely extending the distance between the elevator links.

24. The method of claim 14, wherein attaching the elevator links comprises forcing the elevator links against elevator link retainer assemblies to retain the elevator links with the first elevator using the elevator link retainer assemblies by remotely retracting the distance between elevator links.

25. A method of forming and lowering a tubular string into a wellbore using a remotely operated elevator system, comprising:

providing elevator links attached to a first elevator and a sliding false rotary table located above a rig floor, wherein the false rotary table is disposed in a landing position to axially support a tubular;

axially engaging the tubular with the first elevator;

locating the first elevator substantially coaxial with the wellbore on the false rotary table;

remotely detaching the elevator links from the first elevator by utilizing a link spreader arrangement, wherein the link spreader assembly is disposed between the elevator links and operatively attached to each elevator link; and

remotely attaching the elevator links to a second elevator.

26. The method of claim 25, further comprising:

axially engaging a tubular section with the second elevator; and

rotating the tubular section to connect the tubular section to the tubular.

27. The method of claim 26, further comprising remotely opening the first elevator.

28. The method of claim 27, further comprising moving the false rotary table by remote actuation into a running position to provide a hole in the false rotary table of sufficient diameter to permit lowering of a shoulder of the tubular therethrough.

29. The method of claim 28, further comprising remotely actuating an elevator retaining mechanism to retain the first elevator in position with respect to the hole.

30. The method of claim 28, further comprising lowering the shoulder of the tubular through the hole in the false rotary table.

31. The method of claim 30, further comprising moving the false rotary table back to the landing position by remote actuation without moving the first elevator.

32. The method of claim 31, further comprising locating the second elevator on the false rotary table substantially coaxial with the wellbore.

33. The method of claim 32, further comprising remotely detaching the elevator links from the second elevator.

34. The method of claim 33, further comprising remotely attaching the elevator links to the first elevator.

35. The method of claim 25, wherein remotely detaching the elevator links from the first elevator comprises extending a link spreading apparatus connecting the elevator links.

36. The method of claim 25, wherein the steps are performed automatically.

37. An apparatus for handling tubulars, comprising:

at least two elevators for engaging one or more tubular sections, the at least two elevators interchangeable to support one or more tubular sections above a wellbore and to lower the one or more tubular sections into the wellbore;

elevator links attachable to each elevator, wherein the elevator links are remotely transferable between the at least two elevators; and

a false rotary table remotely moveable between a landing position for supporting one or more tubular sections above a wellbore using at least one of the at least two elevators and a running position for lowering the one or more tubular sections into the wellbore, wherein the false rotary table comprises a table slidable along a stationary surface to move the false rotary table between the landing position and the running position.

38. The apparatus of claim 37, wherein the false rotary table further comprises at least one elevator retaining assembly mounted on the stationary surface for retaining one of the at least two elevators with the stationary surface while sliding the slidable table from the landing position to the running position.

39. The apparatus of claim 38, wherein the at least one elevator retaining assembly is extendable to engage a hole within one of the at least two elevators to retain the elevator with the stationary surface.