Patent US4817716A successfully refreshed from Google Patents.
US4817716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe connector and method of applying same
Assignee: Cameron International Corp
•
Filing: 1987-04-30
•
Granted: 1989-04-04
•
Expires: 2007-04-30
Abstract
Abstract An improved repair connector for a subsea tubular member and the method of making such repair. The improved repair connector includes a annular housing and an annular guide, said annular housing having internal grooves filled with pressure compensating material, a concave recess having serrations therein, a rib having a downwardly facing shoulder on the interior of said housing, threads on the upper interior of said housing for receiving a string, and means carried by said guide for sealing against the exterior of a string on which the connector is to be installed. Also, a band of brittle material is positioned within a groove in the exterior of the housing which generates a noise upon the deformation of the housing responsive to completion of the forming of the tubular member therein. The method of connecting the improved connector includes the steps of preparing the casing at a level below the defect, lowering the improved connector into engagement with the upper end of the prepared casing within the well bore, exerting deforming pressure within the upper end of the casing to deform the casing into sealing engagement within the internal grooves in the connector, and releasing and recovering the means generating the deforming pressure.
Inventors
- 👤 William M. Taylor
- 👤 Thomas G. Cassity
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:36
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/10; E21B43/103; E21B17/00; E21B17/02; E21B29/00; E21B29/10; E21B29/12; E21B43/106; E21B47/00; E21B47/09; E21B47/095; E21B47/12; E21B47/14; E21B47/16; F; F16; F16L; F16L55/00; F16L55/16; F16L55/1608
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
158 words
A casing repair connector comprising: a tubular housing having means at its upper end for connecting to a string extending upwardly from its upper end, internal rib locating means below said connecting means and internal sealing and gripping profiles below said rib locating means, said sealing and gripping profiles including annular grooves in the interior of said tubular housing, and an annular shallow recess lined with serrations, a tubular guide connected to the lower end of said tubular housing to guide said housing in locating it in surrounding relationship to the upper end of the casing to be repaired, said tubular housing being sufficiently strong to withstand deformation of the upper end of the casing into gripping and sealing engagement with the interior of said tubular housing, an annular groove on the interior of said tubular guide, and resilient packing means positioned within said annular groove in said tubular guide for sealing against the exterior of said casing.
Claim 2
Dependent Claim
158 words
A casing repair connector comprising: a tubular housing having means at its upper end for connecting to a string extending upwardly from its upper end, internal rib locating means below said connecting means and internal sealing and gripping profiles below said rib locating means, said sealing and gripping profiles including annular grooves in the interior of said tubular housing, and an annular shallow recess lined with serrations, a tubular guide connected to the lower end of said tubular housing to guide said housing in locating it in surrounding relationship to the upper end of the casing to be repaired, said tubular housing being sufficiently strong to withstand deformation of the upper end of the casing into gripping and sealing engagement with the interior of said tubular housing, an annular groove on the interior of said tubular guide, and resilient packing means positioned within said annular groove in said tubular guide for sealing against the exterior of said casing.
Claim 3
Dependent Claim
16 words
A casing repair connector according to claim 1 including: pressure compensating material in said annular grooves.
Claim 4
Dependent Claim
27 words
A casing repair connector according to claim 3 wherein: said pressure compensating material includes microspheres in a matrix selected from the group of epoxy and syntatic foam.
Claim 5
Independent Claim
110 words
The method of repairing a damaged casing within a well bore including the steps of: preparing the upper end of the damaged casing, lowering a casing repair connector into surrounding relation to the upper end of the prepared casing, said casing repair connector having internal sealing and griping means immediately surrounding the exterior of the upper end of the casing, lowering a pressure forming tool into the upper interior of said prepared casing, delivering fluid under pressure to said pressure forming tool to pressure form the casing into sealing and gripping engagement with said internal sealing and gripping means within said casing repair connector, and recovering said pressure forming tool.
Claim 6
Independent Claim
110 words
The method of repairing a damaged casing within a well bore including the steps of: preparing the upper end of the damaged casing, lowering a casing repair connector into surrounding relation to the upper end of the prepared casing, said casing repair connector having internal sealing and griping means immediately surrounding the exterior of the upper end of the casing, lowering a pressure forming tool into the upper interior of said prepared casing, delivering fluid under pressure to said pressure forming tool to pressure form the casing into sealing and gripping engagement with said internal sealing and gripping means within said casing repair connector, and recovering said pressure forming tool.
Claim 7
Dependent Claim
40 words
The method according to claim 4 including the step of: detecting the completion of the forming step by sensing the noise generated by the fracturing of a brittle band of material carried in the exterior of the casing repair connector.
Claim 8
Dependent Claim
105 words
A casing repair connector comprising: a tubular housing having means at its upper end for connecting to a string extending upwardly from its upper end, internal rib locating means below said connecting means and internal sealing and gripping profiles below said rib locating means, and a tubular guide connected to the lower end of said tubular housing to guide said housing in locating it in surrounding relationship to the upper end of the casing to be repaired, said tubular housing being sufficiently strong to withstand deformation of the upper end of the casing into gripping and sealing engagement with the interior of said tubular housing.
Claim 9
Dependent Claim
105 words
A casing repair connector comprising: a tubular housing having means at its upper end for connecting to a string extending upwardly from its upper end, internal rib locating means below said connecting means and internal sealing and gripping profiles below said rib locating means, and a tubular guide connected to the lower end of said tubular housing to guide said housing in locating it in surrounding relationship to the upper end of the casing to be repaired, said tubular housing being sufficiently strong to withstand deformation of the upper end of the casing into gripping and sealing engagement with the interior of said tubular housing.
Claim 10
Dependent Claim
32 words
A casing repair connector according to claim 6 wherein said sealing and gripping profiles include: annular grooves in the interior of said tubular housing, and an annular shallow recess lined with serrations.
Claim 11
Dependent Claim
40 words
A casing repair connector according to claim 6 including: an annular groove on the interior of said tubular guide, and resilient packing means positioned within said annular groove in said tubular guide for sealing against the exterior of said casing.
Claim 12
Dependent Claim
59 words
A casing repair connector according to claim 6 including: a groove around the exterior of said tubular housing at the level slightly below the level of the internal locating means, and a brittle material filling said external groove in said tubular housing, said brittle material being selected to fail at a preselected hoop tension to produce an audible noise.
Claim 13
Dependent Claim
25 words
A casing repair connector according to claim 9 wherein: said brittle material is selected from the group consisting of a thermosetting resin and a ceramic
References Cited (Backward Citations)
US2477676A
Cited
US2134311A
Cited
US2438529A
Cited
US2495352A
Cited
US3194310A
Cited
US3191677A
Cited
US3432916A
Cited
US3534988A
Cited
US4330144A
Cited
US4388752A
Cited
US4593448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |