US4312405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cementing procedure for casing
Assignee: BP Corp North America Inc
•
Filing: 1980-07-03
•
Granted: 1982-01-26
•
Expires: 2000-07-03
Abstract
Abstract This invention relates to improved methods for cementing a casing in a wellbore to prevent poor cement jobs by twisting the casing string under tension or compression while circulating the cement in the annulus between the casing and wellbore in a conventional manner. A J-slot is positioned on the lower portion of the casing. The lower end of the tubing string is provided with a turning and stressing tool and a lug, the lug being engagable with the J-slot. The lug and J-slot are engaged and the lower portion of the casing is caused to twist and stress while cement is being circulated in the wellbore/casing annulus.
Inventors
- 👤 Lawrence B. Wilder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:54
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/004; E21B23/006; E21B33/00; E21B33/10; E21B33/13; E21B33/14; E21B33/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
71 words
A method for setting a casing in a wellbore comprising: (a) suspending said casing in said wellbore, (b) suspending a tubing string in said casing (c) attaching the lower end of said tubing to the lower portion of said casing; and (d) oscillating and reciprocating said tubing while placing cement in at least a part of the annulus between the lower portion of said casing and the wall of said wellbore.
Claim 2
Independent Claim
71 words
A method for setting a casing in a wellbore comprising: (a) suspending said casing in said wellbore, (b) suspending a tubing string in said casing (c) attaching the lower end of said tubing to the lower portion of said casing; and (d) oscillating and reciprocating said tubing while placing cement in at least a part of the annulus between the lower portion of said casing and the wall of said wellbore.
Claim 3
Dependent Claim
31 words
The method of claim 1 wherein additionally comprises step (e) which follows step (d), step (e) comprising discontinuing oscillation and reciprocation of said tubing prior to the setting of said cement.
Claim 4
Dependent Claim
23 words
The method of claim 1 wherein said cement is placed in said annulus by pumping said cement down the interior of said tubing.
Claim 5
Dependent Claim
19 words
The method of claim 1 additionally comprises maintaining the upper portion of said casing in an essentially fixed position.
References Cited (Backward Citations)
US2072982A
Cited
US2609881A
Cited
US2678082A
Cited
US2738011A
Cited
US2876844A
Cited
US3205945A
Cited
US3557875A
Cited
US4093028A
Cited
US3976139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-25 | 1985-07-27 | 1986-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-25 | 1989-07-27 | 1990-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-25 | 1993-07-27 | 1994-01-26 | $7700.00 | Window Closed / Lapsed |