C-plate assembly for use in a cable guided fishing assembly

• US 20070044971A1
• Filed: 09/01/2005
• Published: 03/01/2007
• Est. Priority Date: 09/01/2005
• Status: Active Grant

• Current Assignee: National Oilwell DHT, LP (NOV, Inc.)
• Original Assignee: National Oilwell DHT, LP (NOV, Inc.)
• Inventors: Isaacks, C., Livingston, Jimmy, Garcia, Filiberto, Streater, James, Cordova, Noe, Motley, Jay
• Granted Patent: US 7,461,700 B2
• Time in Patent Office: Days
• US Class Current: 166/301
• CPC Class Codes: E21B 17/10 Wear protectors; Centralising devices , e.g. stabilisers
• CPC Class Codes: E21B 31/00 Fishing for or freeing objects in boreholes or wells

Abstract

A C-plate assembly for use in a cable-guided fishing assembly is disclosed. The disclosed invention provides a C-plate assembly in which a closure member is slidable from an open position, which allows a wellbore tubular or other item to be positioned in the cut-out section of the C-plate base, to a closed position, which closes the opening to the cut-out section and thereby prevents the wellbore tubular or other item from being unintentionally knocked free from the cut-out section during a fishing operation. The closure member is locked in place in the closed position by inserting the ends of a movable handle extending off of one side of the C-plate base into openings in the C-plate base. The ends of the movable handle are spring loaded to allow for the ends to be pulled out of the openings in the C-plate base such that the closure member can be “unlocked” and moved from a closed position to an open position during operation.

Claims

1. A C-plate apparatus comprising:

a base section having an opening that extends inwardly from an outer edge of the base section;

a closure member; and

a plurality of handles, the plurality of handles including a movable handle that is movable in relation to the base section.

2. The C-plate apparatus of claim 1 wherein at least one of the plurality of handles is immovably secured to the base section.

3. The C-plate apparatus of claim 2 wherein the at least one of the plurality of handles immovably secured to the base section is secured within a plurality of housings extending from the base section.

4. The C-plate apparatus of claim 1 wherein the movable handle is operatively connected to the closure member through a plurality of housings extending outwardly from the closure member.

5. The C-plate apparatus of claim 4 wherein each of the plurality of housings contain a compression spring that surrounds a portion of the movable handle.

6. The C-plate apparatus of claim 5 wherein the closure member comprises a bottom section and a top section.

7. The C-plate apparatus of claim 6 wherein the bottom section and the top section are connected together by a plurality of mechanical fasteners.

8. The C-plate apparatus of claim 7 wherein the plurality of fasteners comprise a plurality of threaded bolts.

9. The C-plate apparatus of claim 6 wherein the bottom section and the top section are connected together by welding.

10. The C-plate apparatus of claim 6 wherein the base section comprises a top side and a bottom side, each of the top side and the bottom side having a wall separating a recessed portion in the top side and a recessed portion in the bottom side from an outer portion of the base section.

11. The C-plate apparatus of claim 10 wherein the wall is a vertical wall.

12. The C-plate apparatus of claim 11 wherein the bottom section of the closure member comprises a wall forming the outer surface of the bottom section and a raised ridge along the interior edge of the bottom section.

13. The C-plate apparatus of claim 12 wherein the top section of the closure member comprises a ridge along the interior edge of the top section, the ridge extending downwardly from a top surface of the top section.

14. The C-plate apparatus of claim 13 wherein the raised ridge of the bottom section of the closure member, the ridge of the top section of the closure member, and the walls of the top side and bottom side of the base section function together to operatively connect the closure member with the base section.

15. The C-plate apparatus of claim 14 wherein the closure member is adapted for movement around the outer portion of the base section during use.

16. The C-plate apparatus of claim 15 wherein the raised ridge of the bottom section of the closure member, the ridge of the top section of the closure member, and the walls of the top side and bottom side of the base section function together to guide the movement of the closure member around the outer portion of the base section.

17. The C-plate apparatus of claim 16 wherein the movement of the closure member around the outer portion of the base section is limited by one or more shoulders on the outer portion of the base section.

18. The C-plate apparatus of claim 17 further comprising a plurality of holes in the wall that forms the outer surface of the bottom section.

19. The C-plate apparatus of claim 18 wherein the plurality of holes in the wall that forms the outer surface of the bottom section are adapted to receive ends of the movable handle.

20. The C-plate apparatus of claim 19 further comprising a plurality of holes in the outer portion of the base section, wherein the plurality of holes in the outer portion of the base section are adapted to receive the ends of the movable handle.

21. A C-plate apparatus comprising:

a base section having a top side and a bottom side, the top side and bottom side each having a wall separating a recessed portion in the top side and a recessed portion in the bottom side from an outer portion of the base section;

a plurality of holes in the outer portion of the base section; and

an opening that extends inwardly from an outer edge of the base section;

a fixed handle connected to the outer portion of the base section;

a movable handle that is movable in relation to the base section;

a closure member adapted for movement around the outer portion of the base section through movement of the movable handle, the closure member having a bottom section and a top section, wherein the bottom section comprises a wall forming the outer surface of the bottom section and a raised ridge along the interior edge of the bottom section, and wherein the top section comprises a downwardly extending ridge along the interior edge of the top section;

a plurality of housings extending outwardly from the closure member, the plurality of housings operatively connecting the movable handle to the closure member and each containing a compression spring that surrounds a portion of the movable handle.

22. The C-plate apparatus of claim 21 wherein the bottom section and the top section of the closure member are connected together by a plurality of mechanical fasteners.

23. The C-plate apparatus of claim 22 wherein the plurality of mechanical fasteners comprise a plurality of threaded bolts.

24. The C-plate apparatus of claim 21 wherein the bottom section and the top section are connected together by welding.

25. The C-plate apparatus of claim 21 wherein the raised ridge of the bottom section of the closure member, the downwardly extending ridge of the top section of the closure member, and the walls of the top side and bottom side of the base section function together to operatively connect the closure member with the base section.

26. The C-plate apparatus of claim 25 wherein the raised ridge of the bottom section of the closure member, the ridge of the top section of the closure member, and the walls of the top side and bottom side of the base section function together to guide the movement of the closure member around the outer portion of the base section.

27. The C-plate apparatus of claim 26 wherein the movement of the closure member around the outer portion of the base section is limited by one or more shoulders on the outer portion of the base section.

28. The C-plate apparatus of claim 21 further comprising a plurality of holes in the wall that forms the outer surface of the bottom section of the closure member.

29. The C-plate apparatus of claim 28 wherein the plurality of holes in the wall that forms the outer surface of the bottom section of the closure member are adapted for receiving ends of the movable handle.

30. The C-plate apparatus of claim 29 wherein the plurality of holes in the outer portion of the base section are adapted for receiving the ends of the movable handle.

31. A method of securing a tubular within a C-plate apparatus, the method comprising:

providing a base section with an opening that extends inwardly from an outer edge of the base section and a plurality of holes in an outer portion of the base section;

providing a fixed handle connected to the base section;

providing a movable handle that is movable in relation to the base section, the movable handle comprising a plurality of ends;

providing a closure member adapted for movement around an outer portion of the base section through movement of the movable handle, the closure member having a bottom section and a top section, wherein the bottom section comprises a plurality of holes in an outer surface of the bottom section adapted to allow the plurality of ends of the movable handle to pas through the bottom section;

providing a plurality of housings extending outwardly from the closure member, the plurality of housings operatively connecting the movable handle to the closure member, and each of the plurality of housings containing a compression spring that surrounds a portion of the movable handle;

exerting a force on the movable handle such that the movable handle moves in a direction away from the base section, thereby compressing the compression springs and thereby moving the ends of the movable handle out of the plurality of holes in the outer portion of the base section;

moving the movable handle such that the closure member moves around the outer portion of the base section until the closure member no longer blocks the opening in the base section;

positioning the C-plate apparatus around a tubular such that the tubular resides within the opening in the base section;

moving the movable handle such that the closure member moves around the outer portion of the base section until the closure member blocks the opening in the base section;

releasing the force on the movable handle such that the compression springs force the movable handle inwardly toward the base section, thereby moving the ends of the movable handle into the plurality of holes in the outer portion of the base section.

32. The method of claim 31 further comprising connecting the bottom section and the top section of the closure member together by a plurality of mechanical fasteners.

33. The method of claim 32 wherein the plurality of mechanical fasteners comprise a plurality of threaded bolts.

34. The method of claim 31 further comprising connecting the bottom section and the top section of the closure member together by welding.

35. The method of claim 31 further comprising providing the base section with a top side and a bottom side each having a wall separating a recessed portion in the top side and bottom side from an outer portion of the base section.

36. The method of claim 35 wherein the bottom section of the closure member comprises a wall forming an outer surface of the bottom section and a raised ridge along the interior edge of the bottom section.

37. The method of claim 36 wherein the top section of the closure member comprises a downwardly extending ridge along the interior edge of the top section.

38. The method of claim 37 further comprising operatively connecting the closure member and the base section together by the raised ridge of the bottom section of the closure member, the downwardly extending ridge of the top section of the closure member, and the walls of the top side and bottom side of the base section.

39. The method of claim 38 further comprising guiding the movement of the closure member around a portion of the base section by the raised ridge of the bottom section of the closure member, the ridge of the top section of the closure member, and the walls of the top side and bottom side of the base section.

40. The method of claim 39 further comprising forming one or more shoulders on the outer portion of the base section.

41. The method of claim 40 wherein the movement of the closure member around the outer portion of the base section is limited by the one or more shoulders.

42. A C-plate apparatus comprising:

a base section having a top side and a bottom side, the top side and bottom side each having a wall separating a recessed portion in the top side and a recessed portion in the bottom side from an outer portion of the base section; and

an opening that extends inwardly from an outer edge of the base section;

a closure member adapted for movement around the outer portion of the base section, the closure member having a bottom section and a top section, wherein the bottom section comprises a wall forming the outer surface of the bottom section and a raised ridge along the interior edge of the bottom section, and wherein the top section comprises a downwardly extending ridge along the interior edge of the top section;

a fixed handle connected to the base section;

a movable handle connected to the closure member, the movable handle adapted for moving the closure member around the outer portion of the base section;

a locking mechanism for locking the closure member in a closed position, the locking mechanism comprising an actuator handle, a cable, and a locking member.

43. The C-plate apparatus of claim 42 wherein the base section further comprises a notch in the outer portion of the base section.

44. The C-plate apparatus of claim 43 wherein the locking member comprises a locking head, the locking head adapted for insertion into the notch in the outer portion of the base section when the closure member is in a closed position.

45. The C-plate apparatus of claim 44 wherein the locking mechanism further comprises conduit for housing the cable.

46. The C-plate apparatus of claim 45 wherein the bottom section and the top section of the closure member are connected together by a plurality of mechanical fasteners.

47. The C-plate apparatus of claim 46 wherein the plurality of mechanical fasteners comprise a plurality of threaded bolts.

48. The C-plate apparatus of claim 42 wherein the bottom section and the top section are connected together by welding.

49. The C-plate apparatus of claim 45 wherein the raised ridge of the bottom section of the closure member, the downwardly extending ridge of the top section of the closure member, and the walls of the top side and bottom side of the base section function together to operatively connect the closure member with the base section.

50. The C-plate apparatus of claim 49 wherein the raised ridge of the bottom section of the closure member, the ridge of the top section of the closure member, and the walls of the top side and bottom side of the base section function together to guide the movement of the closure member around the outer portion of the base section.

51. The C-plate apparatus of claim 50 wherein the movement of the closure member around the outer portion of the base section is limited by one or more shoulders on the outer portion of the base section.