Granted Patent B2

US 7,353,880 · App. 11/560,211 · Granted Apr 8, 2008

Abstract

Claims (54)

1. An apparatus for connecting casing sections by using a top drive, comprising:

at least one elevator;

at least two bails operatively coupled to the top drive at one end and the at least one elevator at another end;

an actuator operatively coupled to the at least two bails and configured to rotate the at least two bails about a horizontal axis, whereby the at least one elevator is moved from a first location substantially below the top drive to a second location out from under the top drive; and

at least one gripping element operatively coupled to the top drive and configured to be radially displaceable for engagement with an outer wall of a casing.

2. The apparatus of claim 1 , wherein the at least one elevator is adapted to maintain the casing in a substantially vertical position as the casing is moved into alignment with the vertical axis.

3. The apparatus of claim 2 , wherein the at least one gripping element is rotatable by the top drive.

4. The apparatus of claim 1 , wherein the at least one elevator is pivotally coupled to the two bails.

5. The apparatus of claim 1 , wherein the at least two bails share a common axis of rotation.

6. The apparatus of claim 1 , further comprising an axial actuator adapted to move the at least one elevator closer to the pivot point.

7. An apparatus for connecting casing sections by using a top drive, comprising:

at least one elevator;

at least two bails operatively coupled to the top drive at one end and the at least one elevator at another end;

an actuator operatively coupled to each of the at least two bails and configured to rotate the at least one bail about a horizontal axis, whereby the at least one elevator is moved from a first location substantially below the top drive to a second location out from under the top drive; and

at least one gripping element operatively coupled to the top drive and configured to be radially displaceable for engagement with an inner wall of a casing.

8. The apparatus of claim 7 , wherein the at least one elevator is pivotally coupled to the at least two bails.

9. The apparatus of claim 7 , wherein the at least one elevator is adapted to maintain the casing in a substantially vertical position as the casing is moved into alignment with the vertical axis.

10. The apparatus of claim 9 , wherein the at least one gripping element is rotatable by the top drive.

11. The apparatus of claim 9 , further comprising a weight compensator.

12. The apparatus of claim 9 , wherein the actuator comprises at least one piston and cylinder assembly.

13. An apparatus for connecting casing sections by using a top drive, comprising:

an elevator;

at least one gripping element operatively coupled to the top drive and configured to be radially displaceable for engagement with a casing;

at least one extendable member operatively coupled to the top drive at one end and the elevator at another end, wherein the at least one extendable member is retractable to move the elevator closer to the at least one gripping element; and

an actuator operatively coupled to the at least one extendable member and configured to rotate the extendable member about a horizontal axis, whereby the at least one elevator is moved from a first location substantially below the top drive to a second location out from under the top drive.

14. The apparatus of claim 13 , wherein the elevator is pivotally coupled to the extendable member.

15. The apparatus of claim 13 , wherein the elevator is adapted to maintain the casing in a substantially vertical position as the casing is moved into alignment with the vertical axis.

16. The apparatus of claim 15 , wherein the at least one gripping element is rotatable by the top drive.

17. The apparatus of claim 13 , wherein two extendable members are used.

18. The apparatus of claim 17 , wherein the two extendable members share a common axis of rotation.

19. The apparatus of claim 13 , wherein the extendable member comprises a piston and cylinder assembly.

20. A method for handling a pipe in a rig, the rig including a spider, a top drive with a pipe engaging apparatus secured therebelow, and a link arm capable of pivoting relative to the pipe engaging apparatus, comprising:

coupling the link arm to a track on the rig;

using the link arm to pick up the pipe;

hoisting the top drive in the rig such that the pipe is rotated to a substantially vertical position while remaining engaged by the link arm;

positioning a lower end of the pipe onto a joint positioned in the spider such that the pipe is supported thereby;

slidably holding an upper portion of the pipe with the link arm;

engaging the upper portion of the pipe using the pipe engaging apparatus;

driving the pipe to connect it to the joint;

lowering the pipe until it is supported in the spider; and

disengaging the pipe engaging apparatus from the pipe.

21. The method of claim 20 , wherein the pipe engaging apparatus comprises radially movable gripping elements.

22. A method for handling a pipe in a rig, the rig including a spider, a top drive with a pipe engaging apparatus secured therebelow to define a main axis of the rig, the method comprising:

providing a link arm mounted by a pivotal connection to move with the top drive, the link arm driven to pivot about its pivotal connection through a plane of rotation at least between a lowered position and a raised position;

using the link arm to pick up the pipe;

hoisting the top drive in the rig such that the pipe is rotated to a substantially vertical position while remaining engaged by the link arm;

positioning a lower end of the pipe section onto a joint positioned in the rotary table such that the pipe is supported thereby;

slidably holding an upper portion of the pipe with the link arm;

engaging the upper portion of the pipe using the pipe engaging apparatus;

driving the pipe to connect it to the joint, wherein the link arm does not rotate relative to the pipe while the pipe is being driven;

lowering the pipe until it is supported in the spider; and

disengaging the pipe engaging apparatus from the pipe.

23. The method of claim 22 , wherein the link arm is coupled to a track on the rig.

24. The method of claim 22 , wherein the pipe engaging apparatus comprises radially movable gripping elements.

Assignments (8)