US3608652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater drilling apparatus
Assignee: Drilex Systems Inc
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Filing: 1968-11-13
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Granted: 1971-09-28
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Expires: 1988-11-13
Abstract
Abstract The combination of a drill string, a tubular structure such as an underwater anchor or conductor pipe supported on the drill string for underwater drilling and an antirotational device and the device itself wherein the device has ground engaging elements to grip the bottom of the body of water in which the tubular structure is being set and a connection coacting between the ground-engaging elements and the tubular structure to restrain the tubular structure against rotation during drilling.
Inventors
- 👤 Weldon Medders
- 👤 Lawrence Sanford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:34
CPC Classifications
E; E21; E21B; E21B15/00; E21B15/02; E21B7/00; E21B7/12; E21B7/128
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
219 words
An antirotational device for use with a drill string and a tubular structure in underwater drilling, comprisiNg, an annular structure surrounding said tubular structure and drill string and adapted to be supported thereon during lowering of the tubular structure and drill string into the water, said annular structure having projections extending downwardly therefrom for engagement with the bottom whereby said annular structure is held against rotation when said drill string is rotated, and means coacting between said annular structure and said tubular structure to resist rotation of said tubular structure when said drill string is rotated, said coacting means allowing said annular structure to be slidable along said tubular structure whereby said annular structure engages the bottom during drilling to hold said tubular structure against rotation while allowing said tubular structure to slide therethrough into the well bore as it is being drilled, said annular structure including a second tubular structure, said second tubular structure defining a longitudinal slot extending throughout the length of said second tubular structure, a flange secured to one end of said second tubular structure and defining a hole therethrough, said flange hole being larger than said drill string and smaller than said tubular structure whereby said second tubular structure is supported by said tubular structure on said drill string during lowering into the water.
Claim 2
Dependent Claim
219 words
An antirotational device for use with a drill string and a tubular structure in underwater drilling, comprisiNg, an annular structure surrounding said tubular structure and drill string and adapted to be supported thereon during lowering of the tubular structure and drill string into the water, said annular structure having projections extending downwardly therefrom for engagement with the bottom whereby said annular structure is held against rotation when said drill string is rotated, and means coacting between said annular structure and said tubular structure to resist rotation of said tubular structure when said drill string is rotated, said coacting means allowing said annular structure to be slidable along said tubular structure whereby said annular structure engages the bottom during drilling to hold said tubular structure against rotation while allowing said tubular structure to slide therethrough into the well bore as it is being drilled, said annular structure including a second tubular structure, said second tubular structure defining a longitudinal slot extending throughout the length of said second tubular structure, a flange secured to one end of said second tubular structure and defining a hole therethrough, said flange hole being larger than said drill string and smaller than said tubular structure whereby said second tubular structure is supported by said tubular structure on said drill string during lowering into the water.
Claim 3
Dependent Claim
38 words
A device according to claim 1 wherein said coacting means includes, a swivel connected to said first tubular structure and having a tongue extending outwardly therefrom, said tongue engaging in the longitudinal slot in said second tubular structure.
Claim 4
Independent Claim
242 words
An apparatus for setting a structure underwater comprising, a drill string, a tubular structure which is to be set in the earth underwater, means releasably mounting said tubular structure on said drill string whereby said tubular structure is supported on said drill string during lowering and said drill string may be rotated during drilling, an annular structure mounted around said tubular structure and having a plurality of downwardly projecting teeth, said teeth being adapted to engage the bottom of the body of water during drilling, and means coacting between said annular structure and said tubular structure allowing said tubular structure to move axially within said annular structure and to resist rotation of said tubular structure within said annular structure, said coacting means allowing said annular structure to be slidable along said tubular structure whereby said annular structure engages the bottom during drilling to hold said tubular structure against rotation while allowing said tubular structure to slide therethrough into the well bore as it is being drilled, said annular structure including a second tubular structure, said second tubular structure defining a longitudinal slot extending throughout the length of said second tubular structure, a flange secured to one end of said second tubular structure and defining a hole therethrough, said flange hole being larger than said drill string and smaller than said tubular structure whereby said second tubular structure is supported by said tubular structure on said drill string during lowering into the water.
Claim 5
Independent Claim
242 words
An apparatus for setting a structure underwater comprising, a drill string, a tubular structure which is to be set in the earth underwater, means releasably mounting said tubular structure on said drill string whereby said tubular structure is supported on said drill string during lowering and said drill string may be rotated during drilling, an annular structure mounted around said tubular structure and having a plurality of downwardly projecting teeth, said teeth being adapted to engage the bottom of the body of water during drilling, and means coacting between said annular structure and said tubular structure allowing said tubular structure to move axially within said annular structure and to resist rotation of said tubular structure within said annular structure, said coacting means allowing said annular structure to be slidable along said tubular structure whereby said annular structure engages the bottom during drilling to hold said tubular structure against rotation while allowing said tubular structure to slide therethrough into the well bore as it is being drilled, said annular structure including a second tubular structure, said second tubular structure defining a longitudinal slot extending throughout the length of said second tubular structure, a flange secured to one end of said second tubular structure and defining a hole therethrough, said flange hole being larger than said drill string and smaller than said tubular structure whereby said second tubular structure is supported by said tubular structure on said drill string during lowering into the water.
References Cited (Backward Citations)
US2929610A
Cited
US3252528A
Cited
US3115755A
Cited
US3322191A
Cited
US3426844A
Cited
US3519071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |