Apparatus and method for obtaining proper space-out in a well

• US 6,758,272 B2
• Filed: 09/03/2002
• Issued: 07/06/2004
• Est. Priority Date: 01/29/2002
• Status: Expired due to Fees

• Current Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Original Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Inventors: Toffanin, Ezio, Bixenman, Patrick W.
• Primary Examiner(s): Bagnell, David
• Assistant Examiner(s): HALFORD, BRIAN D
• Application Number:
  US10/233,900
• Publication Number:
  US 20030141075A1
• Time in Patent Office: 672 Days
• Field of Search: 166/65.1, 166/66, 166/113, 166/255.1
• US Class Current: 166/255.1
• CPC Class Codes: E21B 47/04 Measuring depth or liquid level
• CPC Class Codes: E21B 47/09 Locating or determining the position of objects in boreholes or wells , e.g. the position of an extending arm; Identifying the free or blocked portions of pipes

Abstract

The present invention provides an apparatus and method for achieving proper space-out of well components. One aspect of the invention utilizes a dummy production string with a sliding measurement device to measure the proper space-out distance.

Claims

1. A method for accurately spacing out equipment in a well, comprising running a lower completion into a well on a dummy production string, the dummy production string having a pup joint in the place of a completion jewelry of a final production string.

2. The method of claim 1, further comprising the pup joint having one or more of a length, a diameter, a wall thickness, and a material, that is similar to that of the replaced completion jewelry.

3. The method of claim 1, further comprising:

applying a set-down weight on the dummy production string; and

then

measuring the length of the dummy production string.

4. The method of claim 1, further comprising sliding a measurement device along the dummy production string to indicate a desired point on the dummy production string.

5. The method of claim 1, further comprising:

measuring the length of the dummy production string;

removing the dummy production string from the well;

assembling the final production string using the measurement from the measuring step; and

running the final production string into the well.

6. The method of claim 1, further comprising completing a wet connect when running the final production string.

7. The method of claim 1, further comprising:

positioning a measuring device at a first position on the dummy production string;

applying a set down weight to the dummy production string;

moving the measuring device to a second position; and

the distance between the first and second positions representative of the change in the length of the dummy production string when the load on the dummy production string changes from tension to compression.

8. A method for accurately spacing out equipment in a well, comprising:

running a lower completion into the well on a dummy production string having a sliding measurement device;

removing the dummy production string from the well;

measuring the space-out distance using the sliding measurement device;

assembling and running an upper completion string into the well.

9. The method of claim 8, further comprising releasably restraining the measurement device during the running step.

10. The method of claim 8, further comprising completing a wet connect between the upper completion string and the lower completion.

11. The method of claim 10, further comprising providing an anchor in the upper completion string above the wet connect.

12. The method of claim 8, further comprising applying a set-down weight to the dummy production string.

13. An apparatus for use in measuring the proper space out distance for equipment in a well, comprising a running string having a sliding measurement device;

a pup joint of the running string having a characteristic that is similar to that of a characteristic of an upper completion string;

the characteristic selected from the group consisting of a length, a diameter, a wall thickness, and a material.

14. The apparatus of claim 13, further comprising a release mechanism connecting the sliding measurement device to the running string.

15. The apparatus of claim 14, where in the release mechanism is selected from the group consisting of a shear pin, a dog, a collet, a solenoid, a sleeve, and a set of ratchet teeth.

16. The apparatus of claim 13, further comprising a position lock connecting the sliding measurement device to the running string.

17. The apparatus of claim 16, wherein the position lock is selected from the group consisting of a friction device and a ratchet mechanism.