Patent US3827486A successfully refreshed from Google Patents.
US3827486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well reentry system
Assignee: Baker Hughes Holdings LLC
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Filing: 1972-03-17
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Granted: 1974-08-06
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Expires: 1992-03-17
Abstract
Abstract Method and apparatus for completing a well having a wellhead supported on a platform above a body of water and the well bore of which penetrates the floor of the body of water. The method comprises the steps of: running at least one casing string into the well bore; cementing the casing string in the well bore; running a first portion of a tubing string into the casing string; suspending the first portion of the tubing string in the casing string at a point below the floor; lowering a second portion of the tubing string through the body of water into sliding and sealing telescopic engagement with the upper end of the first portion of the tubing string; and suspending the second portion of the tubing string at the wellhead. The apparatus may comprise a safety vavle assembly installed in the first portion of the tubing string at a point below the water body floor. The valve assembly may be hydraulically operated by fluid conducted to the valve assembly through a conduit supported at the wellhead and extending through the body of water for fluid-tight communication with the valve assembly.
Inventors
- 👤 H Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:41
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/10; E21B33/00; E21B33/02; E21B33/03; E21B33/035
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
228 words
A method of completing a well having a wellhead supported on a platform above a body of water and the well bore of which penetrates the floor of said body of water comprising the steps of: a. running at least one casing string into said well bore; b. cementing said casing string in said well bore; c. running a first portion of a tubing string, having connector means on the upper end thereof, into said casing string; d. suspending said first portion of said tubing string in said casing string at a point below said floor; e. lowering a hydraulic conduit and a second portion of a tubing string through said body of water into sliding and sealing telescopic engagement with said connector means, leaving said hydraulic conduit and second tubing string portion free for sliding non-rotational disengagement from said connector means, said first and second tubing string portions being in fluidtight communication with each other; f. suspending said hydraulic conduit and said second tubing string portion at said wellhead; and g. installing a valve in said first string of tubing at a poinT below said floor and in fluidtight communication with said hydraulic conduit, through said connector means, so that said sliding non-rotational disengagement of said hydraulic conduit from said connector means interrupts said fluid communication with said valve closing said first portion of said tubing string.
Claim 2
Independent Claim
228 words
A method of completing a well having a wellhead supported on a platform above a body of water and the well bore of which penetrates the floor of said body of water comprising the steps of: a. running at least one casing string into said well bore; b. cementing said casing string in said well bore; c. running a first portion of a tubing string, having connector means on the upper end thereof, into said casing string; d. suspending said first portion of said tubing string in said casing string at a point below said floor; e. lowering a hydraulic conduit and a second portion of a tubing string through said body of water into sliding and sealing telescopic engagement with said connector means, leaving said hydraulic conduit and second tubing string portion free for sliding non-rotational disengagement from said connector means, said first and second tubing string portions being in fluidtight communication with each other; f. suspending said hydraulic conduit and said second tubing string portion at said wellhead; and g. installing a valve in said first string of tubing at a poinT below said floor and in fluidtight communication with said hydraulic conduit, through said connector means, so that said sliding non-rotational disengagement of said hydraulic conduit from said connector means interrupts said fluid communication with said valve closing said first portion of said tubing string.
Claim 3
Independent Claim
201 words
A method of completing a well having a wellhead supported on a platform above a body of water and the well bore of which penetrates the floor of said body of water comprising the steps of: a. running at least one casing string into said well bore; b. cementing said casing string in said well bore; c. running a first portion of a tubing string into said casing string; d. suspending said first portion of said tubing string in said casing string at a point below said floor; e. lowering a second portion of a tubing string through said body of water into sliding and sealing telescopic engagement with the upper end of said first tubing string portion; and f. suspending said second tubing string portion at said wellhead; g. a safety valve being installed in said first tubing string portion at a point below said floor, said safety valve being in fluid-tight communication with a hydraulic conduit which is lowered through said body of water and suspended from said platform, said hydraulic conduit surrounding said second tubing string portion so as to provide an annular space therebetween through which fluid may be conducted for hydraulic operation of said safety valve.
Claim 4
Independent Claim
201 words
A method of completing a well having a wellhead supported on a platform above a body of water and the well bore of which penetrates the floor of said body of water comprising the steps of: a. running at least one casing string into said well bore; b. cementing said casing string in said well bore; c. running a first portion of a tubing string into said casing string; d. suspending said first portion of said tubing string in said casing string at a point below said floor; e. lowering a second portion of a tubing string through said body of water into sliding and sealing telescopic engagement with the upper end of said first tubing string portion; and f. suspending said second tubing string portion at said wellhead; g. a safety valve being installed in said first tubing string portion at a point below said floor, said safety valve being in fluid-tight communication with a hydraulic conduit which is lowered through said body of water and suspended from said platform, said hydraulic conduit surrounding said second tubing string portion so as to provide an annular space therebetween through which fluid may be conducted for hydraulic operation of said safety valve.
Claim 5
Dependent Claim
75 words
A method of completing a well as set forth in claim 2 characterized by the further steps of: a. removing said hydraulic conduit and said second tubing string portion from said well; b. lowering another string of pipe through said body of water; c. sealingly connecting said another string of pipe to the upper end of said first tubing string portion; and d. killing said well by pumping fluids through said first tubing string portion.
Claim 6
Dependent Claim
45 words
A method of completing a well as set forth in claim 2 characterized in that said hydraulic conduit and said second tubing string portion are surrounded by a casing string extension extending upwardly through said body of water to said platform where it is supported.
Claim 7
Dependent Claim
80 words
A method of completing a well as set forth in claim 4 characterized by the further steps of: a. removing said hydraulic conduit and said second tubing string portion from said well; and b. removing said casing string extension from said well; c. lowering another string of pipe through said body of water into fluid-tight communication with said first tubing string portion; and d. killing said well by pumping fluids through said another string and said first tubing string portion.
Claim 8
Dependent Claim
201 words
Apparatus for completion of a well having a wellhead supported on a platform above a body of water and the well bore of which penetrates the floor of said body of water comprising: a. at least one casing string cemented in said well bore; b. a first portion of a tubing string supported within said casing string at a point below said floor; c. a second portion of a tubing string telescopically engaging the upper end of said first portion in a sliding and sealing fit at a point below said floor, said second portion being supported in said wellhead at said platform, said second portion being free for sliding non-rotational disengagement from said upper end of said first portion; d. valve means installed in said first tubing string portion; e. connector means attached to the upper end of said first tubing string portion; and f. a hydraulic conduit supported at said wellhead and extending through said body of water for engagement with said connector means and fluidtight communication with said valve means, said hydraulic conduit being free to interrupt said fluidtight communication upon non-rotational axial displacement from said connector means to actuate said valve closing said first tubing string portion.
Claim 9
Dependent Claim
201 words
Apparatus for completion of a well having a wellhead supported on a platform above a body of water and the well bore of which penetrates the floor of said body of water comprising: a. at least one casing string cemented in said well bore; b. a first portion of a tubing string supported within said casing string at a point below said floor; c. a second portion of a tubing string telescopically engaging the upper end of said first portion in a sliding and sealing fit at a point below said floor, said second portion being supported in said wellhead at said platform, said second portion being free for sliding non-rotational disengagement from said upper end of said first portion; d. valve means installed in said first tubing string portion; e. connector means attached to the upper end of said first tubing string portion; and f. a hydraulic conduit supported at said wellhead and extending through said body of water for engagement with said connector means and fluidtight communication with said valve means, said hydraulic conduit being free to interrupt said fluidtight communication upon non-rotational axial displacement from said connector means to actuate said valve closing said first tubing string portion.
Claim 10
Dependent Claim
171 words
Apparatus fOr completion of a well having a wellhead supported on a platform above a body of water and the well bore of which penetrates the floor of said body of water comprising: a. at least one casing string cemented in said well bore; b. a first portion of a tubing string supported within said casing string at a point below said floor; and c. a second portion of a tubing string telescopically engaging the upper end of said first portion in a sliding and sealing fit at a point below said floor, said second portion being supported in said wellhead at said platform; and d. valve means installed in said first tubing string portion, said valve means being hydraulically operated by fluid conducted thereto by conduit means supported at said wellhead and extending through said body of water, said conduit means comprising a hydraulic pipe string surrounding said tubing string second portion and telescopically engaging the upper end of said tubing string first portion in a sliding and sealing fit.
Claim 11
Dependent Claim
171 words
Apparatus fOr completion of a well having a wellhead supported on a platform above a body of water and the well bore of which penetrates the floor of said body of water comprising: a. at least one casing string cemented in said well bore; b. a first portion of a tubing string supported within said casing string at a point below said floor; and c. a second portion of a tubing string telescopically engaging the upper end of said first portion in a sliding and sealing fit at a point below said floor, said second portion being supported in said wellhead at said platform; and d. valve means installed in said first tubing string portion, said valve means being hydraulically operated by fluid conducted thereto by conduit means supported at said wellhead and extending through said body of water, said conduit means comprising a hydraulic pipe string surrounding said tubing string second portion and telescopically engaging the upper end of said tubing string first portion in a sliding and sealing fit.
Claim 12
Dependent Claim
37 words
Apparatus as set forth in claim 7 in which the upper end of said tubing string first portion is provided with connector means for said telescopic engagement with said tubing string second portion and said hydraulic string.
Claim 13
Dependent Claim
55 words
Apparatus as set forth in claim 8 in which said connector means comprises a first tubular sleeve means engaging said second portion and a second tubular sleeve means engaging said hydraulic string and surrounding said first sleeve means leaving an annular space therebetween through which said fluid for operation of said valve means is conducted.
Claim 14
Dependent Claim
41 words
Apparatus as set forth in claim 9 in which said second sleeve means comprises an upper tubular section the walls of which are engaged by seal means carried by said hydraulic string and a lower tubular section therebelow provided with threads.
Claim 15
Dependent Claim
27 words
Apparatus as set forth in claim 9 in which said connector means comprises a tubular support section below said first sleeve means for receiving said valve means.
Claim 16
Dependent Claim
32 words
Apparatus as set forth in claim 11 in which said support section has port means through its walls in fluid communication with said annular space between said first and second sleeve means.
Claim 17
Dependent Claim
178 words
Apparatus for completion of a well having a wellhead supported on a platform above a body of water and the well bore of which penetrates the floor of said body of water comprising: a. at least one casing string cemented in said well bore; b. a first portion of a tubing string supported within said casing string at a point below said floor; and c. a second portion of a tubing string telescopically engaging the upper end of said first portion in a sliding and sealing fit at a point below said floor, said second portion being supported in said wellhead at said platform; d. the upper end of said first portion of a tubing string comprising connector means telescopically receiving seal means carried by the lower end of said second tubing string portion, said connector means comprising first sleeve means for telescopically receiving said second tubing string lower portion and second sleeve means surrounding said first sleeve means for telescopically receiving the lower end of a conduit supported at said platform and surrounding said second tubing string.
Claim 18
Dependent Claim
178 words
Apparatus for completion of a well having a wellhead supported on a platform above a body of water and the well bore of which penetrates the floor of said body of water comprising: a. at least one casing string cemented in said well bore; b. a first portion of a tubing string supported within said casing string at a point below said floor; and c. a second portion of a tubing string telescopically engaging the upper end of said first portion in a sliding and sealing fit at a point below said floor, said second portion being supported in said wellhead at said platform; d. the upper end of said first portion of a tubing string comprising connector means telescopically receiving seal means carried by the lower end of said second tubing string portion, said connector means comprising first sleeve means for telescopically receiving said second tubing string lower portion and second sleeve means surrounding said first sleeve means for telescopically receiving the lower end of a conduit supported at said platform and surrounding said second tubing string.
Claim 19
Dependent Claim
38 words
Apparatus as set forth in claim 13 in which said connector means is provided with connection means engageable with corresponding connection means on another pipe string upon the removal of said second tubing string portion and said conduit.
Claim 20
Dependent Claim
46 words
Apparatus as set forth in claim 13 in which said connector means comprises support means for receiving valve means therein, said valve means being hydraulically operable by fluid supplied from said platform through said conduit and an annular space between said first and second sleeve means.
Claim 21
Dependent Claim
42 words
Apparatus as set forth in claim 15 in which the interior of said second sleeve means is provided with connection means engageable with corresponding connection means on another pipe string Upon the removal of said second tubing string portion and said conduit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |