Claims
- 1. An assembly for performing a well operation with a well tool in a cased borehole, comprising:a reference member having a predetermined depth and angular orientation within the cased borehole; said reference member having a first engagement member engaging the casing; said reference member having no sealing engagement with the cased borehole; an anchor member disposed adjacent said reference member; said anchor member having a second engagement member engaging the casing; and said anchor member withstanding the compression, tension, and torque of the well tool during the well operation.
- 2. An assembly for performing a well operation with a well tool in a cased borehole, comprising:a reference member having a predetermined depth and angular orientation within the cased borehole; said reference member having a first engagement member engaging the casing; an anchor member disposed adjacent said reference member; said anchor member having a second engagement member engaging the casing; said anchor member withstanding the compression, tension, and torque of the well tool during the well operation; and wherein said reference member is not latched to said anchor member.
- 3. The assembly of claim 2 wherein said reference member has no sealing engagement with the cased borehole.
- 4. An assembly for performing a well operation with a well tool in a cased borehole, comprising:a reference member having an upper end with an orientation surface with a depth and angular orientation within the cased borehole; said reference member having an engagement member engaging the casing; a tool assembly with an anchor member, said tool assembly having a lower end which engages said orientation surface to orient said tool assembly within the cased borehole; said anchor member having a securing member engaging the casing; and said anchor member withstanding the compression, tension, and torque of the well tool during the well operation.
- 5. The assembly of claim 4 wherein said reference member does not include a seal bore.
- 6. The assembly of claim 4 wherein said engagement member includes a slip adapted to engage the cased borehole and further including a cam engaging said slip and a bore extending through said reference member.
- 7. The assembly of claim 6 wherein said bore has a diameter which is no more than ¾ of an inch less than the diameter of the cased borehole.
- 8. The assembly of claim 6 wherein the cased borehole has a diameter and said bore has a diameter which is no more than one inch less than the diameter of the cased borehole.
- 9. The assembly of claim 4 wherein said orientation surface locates the depth of the well tool in the cased borehole.
- 10. The assembly of claim 4 wherein said orientation surface angularly orients the well tool within the cased borehole.
- 11. The assembly of claim 4 wherein said orientation surface is mounted on said engagement member.
- 12. The assembly of claim 4 wherein said orientation surface includes an inclined surface with an apex and a slot adapted to receive an orientation key.
- 13. The assembly of claim 4 wherein said tool assembly includes said anchor member, a whipstock and a mill adapted to mill a window in the cased wellbore.
- 14. The assembly of claim 9 wherein said engagement member includes a body with a bore. therethrough and said orientation surface is disposed on said body and does not project into said bore.
- 15. The assembly of claim 4 wherein the cased borehole has a drift diameter and said bore has a diameter which approximates the drift diameter of the cased borehole.
- 16. The assembly of claim 4 wherein said tool assembly includes a deflector having a guide surface.
- 17. The assembly of claim 4 wherein said reference member has a bore extending therethrough, said bore sized to receive the next consecutive sized casing.
- 18. The assembly of claim 4 further including a setting tool engageable with said engagement member to set said reference member in the cased borehole.
- 19. The assembly of claim 18 wherein said setting tool sets the anchor member.
- 20. The assembly of claim 18 wherein said setting tool is releaseable and removable from said reference member.
- 21. The assembly of claim 4 wherein said reference member is permanently installed on the cased borehole.
- 22. An assembly for performing a well operation with a well tool in a cased borehole, comprising:a reference member having an upper end with a stop surface with a depth within the cased borehole; said reference member having an engagement member engaging the casing; and a tool assembly having a lower end which engages said stop surface to set the depth of said tool assembly within the cased borehole.
CROSS-REFERENCE TO RELATED APPLICATIONS
The present application claims the benefit of 35 U.S.C. 119(e) of U.S. Provisional Application Ser. No. 60/134,799, filed May 19, 1999 and entitled “Well Reference Apparatus and Method,” hereby incorporated herein by reference.
US Referenced Citations (18)
Foreign Referenced Citations (2)
Number |
Date |
Country |
2191 803 |
Dec 1987 |
GB |
2291447 |
Aug 1995 |
GB |
Non-Patent Literature Citations (3)
Entry |
UK Search Report for Application No. GB 0012227.5 dated Oct. 18, 2000. |
Praful C. Desai and Charles H. Dewey; Smith International, Inc., Red baron Group; IADC/SPE 59237; Milling Variable Window Openings for Sidetracking; 2000 IADC/SPE Drilling Conference, New Orleans, LA, Feb. 23-25, 2000; (9 p.). |
PCT Search Report for International Application No. PCT/US01/16442 Dated Aug. 28, 2001 (7 p.). |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/134799 |
May 1999 |
US |