US4167279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertically moored platform deck casinghead
Assignee: BP Corp North America Inc
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Filing: 1978-09-18
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Granted: 1979-09-11
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Expires: 1998-09-18
Abstract
Abstract A novel casing torque hanger means for supporting the upper end of a string of casing from the upper end of a riser pipe which is supported by a floating vessel such as a Vertically Moored Platform. It includes a cylindrical member having a torque resistant spool below a casing hanger bowl. The casing string to be supported is provided with a casinghead mandrel at its upper end for engaging said torque resistant spool.
Inventors
- 👤 James E. Lucksinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:59
CPC Classifications
B; B63; B63B; B63B35/00; B63B35/44; B63B35/4413; B63B1/00; B63B1/02; B63B1/10; B63B1/107; E; E21; E21B; E21B7/00; E21B7/12; E21B7/128; B63B1/12; B63B2001/128
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
101 words
An apparatus for connecting the upper end of a casing string extending from a subsea well to a floating vessel supporting an upright member which comprises: a casing torque hanger means having a cylindrical torque resistant spool having at least a vertical slot on the interior thereof and a casing hanger bowl at the upper end of said spool; means to support said casing hanger means from said upright member; a casinghead mandrel having a lug mating with said slot when said mandrel is inserted into said casing hanger means and including means to connect said mandrel to said casing string.
Claim 2
Independent Claim
101 words
An apparatus for connecting the upper end of a casing string extending from a subsea well to a floating vessel supporting an upright member which comprises: a casing torque hanger means having a cylindrical torque resistant spool having at least a vertical slot on the interior thereof and a casing hanger bowl at the upper end of said spool; means to support said casing hanger means from said upright member; a casinghead mandrel having a lug mating with said slot when said mandrel is inserted into said casing hanger means and including means to connect said mandrel to said casing string.
Claim 3
Dependent Claim
20 words
An apparatus as defined in claim 1 including a port means in the wall of said casing torque hanger means.
Claim 4
Independent Claim
109 words
An apparatus for supporting the upper end of a string of casing extending from a subsea well to a floating vessel and in which the vessel is anchored to the subsea well by at least a riser pipe which comprises: a casing hanger means having: (i) at least one vertical slot on the interior thereof; (ii) a casing hanger bowl at the upper end of said casing hanger means; means to support said hanger means from the upper end of said riser pipe; a casinghead mandrel connectible to said string of casing and having a lug means at said slot when said mandrel is inserted into said casing hanger.
Claim 5
Independent Claim
109 words
An apparatus for supporting the upper end of a string of casing extending from a subsea well to a floating vessel and in which the vessel is anchored to the subsea well by at least a riser pipe which comprises: a casing hanger means having: (i) at least one vertical slot on the interior thereof; (ii) a casing hanger bowl at the upper end of said casing hanger means; means to support said hanger means from the upper end of said riser pipe; a casinghead mandrel connectible to said string of casing and having a lug means at said slot when said mandrel is inserted into said casing hanger.
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) | 1982-09-10 | 1983-03-12 | 1983-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-10 | 1987-03-12 | 1987-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-10 | 1991-03-12 | 1991-09-11 | $7700.00 | Window Closed / Lapsed |