Exterior wireline cable adapter sub

• US 5,778,978 A
• Filed: 08/06/1996
• Issued: 07/14/1998
• Est. Priority Date: 08/06/1996
• Status: Expired due to Term

• Current Assignee: Pipe Recovery Services LLP
• Original Assignee: Pipe Recovery Services LLP
• Inventors: Crow, Joseph Michael
• Primary Examiner(s): Tsay, Frank
• Application Number:
  US08/692,528
• Time in Patent Office: 707 Days
• Field of Search: 166/254.1, 166/254.2, 166/264, 166/377, 166/378, 166/373, 166/385, 166/66
• US Class Current: 166/254.2
• CPC Class Codes: E21B 17/025 Side entry subs
• CPC Class Codes: E21B 23/14 for displacing a cable or a cable-operated tool, e.g. for logging or perforating operations in deviated wells
• CPC Class Codes: E21B 33/072 for cable-operated tools E21B33/076 takes precedence

Abstract

A system for use in running and operating an electric wireline well tool in a well on coiled tubing includes tubular adapter and connector subs connected end-to-end between the lower end of the tubing and the upper end of the well tool. The armored electric cable extends down along the outside of the tubing, enters the adapter sub through a window in the side thereof, and is anchored within the connector sub where its conductors are electrically connected to the well tool. The tubing and wireline cable can be run into the well under pressure. A system for retrieving an electric wireline well tool using a retrieving tool on the lower end of coiled tubing also is disclosed.

Claims

1. Apparatus for allowing an electric wireline-operated well tool to be run into a well on armored cable and operated on tubing having a lower end within the well, comprising:

a tubular housing assembly having upper and lower ends, said upper end being attached to the lower end of the tubing and said lower end being attached to the well tool;

window means extending through the wall of said housing assembly so that the armored cable by which said tool is operated can extend from the outside said assembly to inside said assembly;

means in said housing assembly for anchoring said armored cable thereto; and

means in said housing assembly for electrically connecting said cable to the well tool.

2. The apparatus of claim 1 wherein said housing assembly includes upper and lower tubular members, said anchoring means and connecting means being located in said lower tubular member.

3. The apparatus of claim 2 further including releasable coupling means for coupling said upper and lower tubular members to one another.

4. The apparatus of claim 3 wherein said releasable coupling means includes shear means that is disrupt in response to a predetermined force.

5. The apparatus of claim 3 where said window means opens through the lower end of said upper tubular member so that release of said coupling means allows said cable to disengage from said window means and suspend said well tool independently of said tubing.

6. Apparatus for use in connection with the operation of an electric wireline well tool that is run into a well on tubing, comprising:

a tubular adapter sub having an upper end and a lower end with said upper end being arranged to be attached to the tubing, said adapter sub having a bore and a wall between said bore and the outer surface of the sub, said adapter sub having a window through the wall;

a tubular connector sub having an upper portion coupled to said lower end of said adapter sub and a lower portion arranged to be attached to said well tool, said upper portion having a central passage extending longitudinally therethrough, said lower portion having a bore in communication with said central passage;

an armored electric cable extending from said exterior of said adapter sub through said window and down into said bore via said central passage, said cable having armor wires around a central core having at least one electrical conductor therein;

means mounted in said bore for anchoring said armor wires to said connector sub; and

means in said bore for electrically connecting said conductor to the said well tool.

7. The apparatus of claim 6 wherein said window is formed by a longitudinally extending slot having upward and outwardly inclined upper and lower ends.

8. The apparatus of claim 6 further including releasable means for coupling said lower end of said adapter sub to said upper portion of said connector sub, said releasable means being released in response to longitudinal force of a predetermined magnitude.

9. The apparatus of claim 8 where said releasable means includes radially arranged shear pins.

10. The apparatus of claim 6 wherein said anchoring means includes a mandrel having an axial passageway that is sized to slidably receive said cable;

and means on the exterior of said mandrel for gripping end portions of said armor wires to secure said cable to said mandrel.

11. Apparatus for use in retrieving an electric wireline tool that has been lowered into a well bore on an armored electric cable, comprising:

retrieving means adapted to be attached to the lower end of a tubular running string and lowered into the well therewith, said retrieving means including a generally tubular housing having a bore and wall and latch means arranged to automatically couple said housing to the wireline tool;

longitudinal slot means through the wall of said housing and opening through the lower end thereof to enable said cable to pass upward into the bore of said housing and then outside said housing as said retrieving means is lowered; and

means extending across said slot means for retaining said cable as said retrieving means is lowered.

12. The apparatus of claim 11 further including a head on said wireline tool having latch detent means thereon, and wherein said latch means including laterally shiftable latch elements cooperable with said detent means to couple said housing to said head.

13. The apparatus of claim 12 further including means for locking said latch elements in engagement with said detent means as said wireline tool is removed from the well by said running string.

14. The apparatus of claim 11 wherein said slot means has an upper end surface that inclines upward and outward.

15. The apparatus of claim 11 wherein said means for retaining said cable includes pin means engaged in aligned holes in said housing on opposite sides of said slot means.

16. A method of operating an electric wireline well tool that is run in a well on continuous or jointed tubing having a lower end within the well, comprising the steps of:

connecting a tubular adapter means between the lower end of the tubing and the well tool, said adapter means having a wall and an opening through said wall;

extending an end portion of an electric cable having armor wires and conductor means through said opening;

establishing an electrical connection between said conductor means and said well tool to enable operation thereof in response to electrical signals; and

lowering said well tool into a well with said cable extending outside of said tubing.

17. The method of claim 16 where said adapter means includes upper and lower members with said upper member having a lower end and said lower member having an upper end, and including the further step of releasably securing the lower end of said upper member to the upper end of said lower member to enable release of said members from one another in response to longitudinal force of a predetermined magnitude.

18. The method of claim 16 including the further step of anchoring said cable within said adapter means so that said cable is pulled into the well by said adapter means.

19. A method of retrieving a well tool that is suspended in a well on an armored electric cable, comprising the steps of:

running a tubing string into the well alongside the cable, said tubing string having a retrieving tool attached to the lower end thereof, said retrieving tool having a tubular housing with a longitudinal slot opening through the lower end thereof;

threading the cable through said slot so that the cable goes up through said lower end and then out through the upper end of said slot;

retaining said cable with respect to said slot to prevent said cable from coming out of said slot as the retrieving tool passes down along said cable;

operating said retrieving tool to latch the retrieving tool to said well tool; and

then retrieving said well tool by pulling said tubing string and said cable out of the well.