Impression tool and methods of use

Patent metadata

Field	Value
Publication number	US-10954752-B2
Application number	US-201414813350-A
Country	US
Kind code	B2
Filing date	Jan 31, 2014
Priority date	Jan 31, 2013
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

An impression tool for providing an impression of an object in a borehole includes a block held by a gripper. The block has a plurality of discrete elements that can deform or move so as to create an impression of an impacted object. The bock can be formed of knitted wire mesh. The tool is impacted on an object such that an impression is formed in the block.

First claim

The invention claimed is:

1. An impression tool for providing an impression of an object in a borehole, said tool comprising a block held by a gripper, wherein the block comprises a plurality of discrete elements that deform or move so as to create the impression, and wherein the block comprises a knitted wire mesh that is permanently deformed upon creation of the impression.

2. The tool according to claim 1 , wherein the plurality of discrete elements of the block define an impression face and wherein the tool comprises one or more spaces behind the impression face of the block.

3. The tool according to claim 1 , wherein the plurality of discrete elements comprises loops of the knitted wire mesh.

4. The tool according to claim 1 , wherein the block comprises knitted wire having a gauge in the range of 0.05 mm to 0.5 mm.

5. The tool according to claim 1 , wherein the block comprises knitted wire having a density in the range of 0.5 to 5 gram/cc.

6. The tool according to claim 1 , wherein the block comprises knitted wire having a loop size of between 0.5 mm and 5 mm in diameter.

7. The tool according to claim 1 , wherein the block comprises knitted wire having a weft knitting pattern.

8. The tool according to claim 1 , wherein the block comprises knitted wire having a warp knitting pattern.

9. The tool according to claim 1 , wherein the block comprises knitted wire having a consistent knit stitch knitting pattern.

10. The tool according to claim 1 , wherein the block comprises knitted wire having an alternating knit stitch and purl stitch knitting pattern.

11. The tool according to claim 1 , wherein the block is configured to be malleable in normal operating conditions.

12. The tool according to claim 1 , wherein the block is configured to resist extrusion in normal operating conditions.

13. The tool according to claim 1 , wherein the block comprises an impression portion projecting from the gripper and a grip portion, wherein the grip portion is of narrower diameter than the impression portion.

14. The tool according to claim 1 , wherein the block is of substantially cylindrical form.

15. The tool according to claim 1 , wherein the gripper comprises a carrier having a channel into which a portion of the block can be received.

16. The tool according to claim 15 , wherein the gripper further comprises a plurality of clamps received within corresponding slots in the carrier, and the plurality of clamps are forced radially inward to grip the portion of the block.

17. The tool according to claim 16 , wherein each clamp of the plurality of clamps is arc shaped and comprises a plurality of inwardly directed teeth.

18. The tool according to claim 16 , wherein the gripper further comprises a sleeve into which the carrier and the plurality of clamps are received, and wherein the sleeve is radially disposed in relation to the plurality of clamps to force the plurality of clamps radially inward.

19. The tool according to claim 1 , further comprising a protective element for the block.

20. The tool according to claim 19 , wherein the protective element comprises a skirt member which at least partially surrounds the block.

21. The tool according to claim 20 , wherein the block comprises and impression portion projecting from the gripper and the skirt member extends axially along the impression portion so that the edge of the skirt member is flush with an impression face of the block.

22. The tool according to claim 19 , wherein the protective element is provided with an engaging formation which secures the protective element into the gripper.

23. The tool according to claim 19 , wherein the protective element is configured to direct impact forces experienced in use to the gripper.

24. The tool according to claim 19 , wherein the protective element is formed from a material selected to be malleable in normal operating conditions.

25. A block of knitted wire mesh for a borehole impression tool, the block comprising a grip portion suitable for being gripped by a gripper of the borehole impression tool, and an impact portion suitable for impacting an object in a borehole so as to create an impression of the object in the block, wherein the knitted wire mesh is permanently deformed upon creation of the impression.

26. The block according to claim 25 , wherein the block comprises knitted wire having a gauge in the range of 0.05 mm to 0.5 mm.

27. The block according to claim 25 , wherein the block comprises knitted wire having a density in the range of 0.5 to 5 gram/cc.

28. The block according to claim 25 , wherein the block comprises knitted wire having a loop size of between 0.5 mm and 5 mm in diameter.

29. The block according to claim 25 , wherein the block comprises an impression portion projecting from the gripper and the grip portion, wherein the grip portion is of narrower diameter than the impression portion.

30. A kit of parts for assembling an impression tool according to claim 1 , the kit comprising:
a block comprising a plurality of discrete elements that deform or move so as to create an impression of an object in a borehole, wherein the block comprises a knitted wire mesh; and
a gripper to hold the block.

31. The kit of parts according to claim 30 further comprising a protective element for the block.

32. The kit of parts according to claim 30 further comprising an assembly tool, the assembly tool comprising an anti-swage ring for the protective element during assembly of the block into the gripper.

Assignees

• Peak Well Systems Pty Ltd
• Schlumberger Technology Corp

Inventors

• Manson David John Copeland
• Brown Gareth

Classifications

• E21B47/098 Primary

  using impression packers, e.g. to detect recesses or perforations · CPC title

• E21B31/00

  Fishing for or freeing objects in boreholes or wells · CPC title

• E21B41/00 Primary

  Equipment or details not covered by groups E21B15/00 - E21B40/00 · CPC title