US3745774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater anchor structure and method of setting same
Assignee: SONAT OFFSHORE DRILLING Inc
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Filing: 1970-07-27
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Granted: 1973-07-17
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Expires: 1990-07-27
Abstract
Abstract An underwater anchor structure having a tubular body, a drill bit secured to the lower end of the body, a stop plate secured to the exterior of the body, means for releasably connecting the upper end of the body to a drill string and a swivel joint rotatably mounted around the body above the stop plate, part of the joint being releasably connected to said body and the method of setting such underwater anchor structure including the steps of drilling a well bore underwater with the anchor structure attached to a drill string, flowing cement through the drill string and the anchor structure into the well bore, releasing the drill string from the anchor structure and recovering the drill string while leaving the anchor structure cemented in the well bore; this abstract is neither intended to define the invention of the application which, of course, is measured by the claim, nor is it intended to be limiting as to the scope of the invention in any way.
Inventors
- 👤 F Sharp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:24
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/12; B; B63; B63B; B63B21/00; B63B21/24; B63B21/26; B63B21/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
149 words
An underwater anchor structure comprising, a tubular body, drilling means secured to an integral width the lower end of said tubular body, means for releasably connecting a drill string to the upper end of said tubular body, means for releasably connecting a cable to said tubular body whereby when the tubular body is set in an underwater well bore said cable can be used to anchor a structure with respect to said tubular body and when desired may be recovered therefrom, said cable connecting means including a swivel joint pivotally mounted around said tubular body, said swivel joint including a first sleeve component rotatably retained on said tubular body and a second sleeve having an anchor cable releasably attached thereto, said first sleeve having opposite arms extending outwardly therefrom, said second sleeve having opposite arms extending outwardly therefrom, and fastening means for releasably connecting the arms of said sleeves.
Claim 2
Dependent Claim
149 words
An underwater anchor structure comprising, a tubular body, drilling means secured to an integral width the lower end of said tubular body, means for releasably connecting a drill string to the upper end of said tubular body, means for releasably connecting a cable to said tubular body whereby when the tubular body is set in an underwater well bore said cable can be used to anchor a structure with respect to said tubular body and when desired may be recovered therefrom, said cable connecting means including a swivel joint pivotally mounted around said tubular body, said swivel joint including a first sleeve component rotatably retained on said tubular body and a second sleeve having an anchor cable releasably attached thereto, said first sleeve having opposite arms extending outwardly therefrom, said second sleeve having opposite arms extending outwardly therefrom, and fastening means for releasably connecting the arms of said sleeves.
Claim 3
Dependent Claim
36 words
An underwater anchor structure according to claim 1 wherein a portion of the arms of said first and second components overlap, and said fastening means extend through aligned holes in the overlapping portions of said arms.
Claim 4
Dependent Claim
41 words
An underwater anchor structure according to claim 1 wherein said first component includes opposed pairs of spaced apart arms, said second component includes opposed arms each having depending portions extending between the respective pairs of the arms of said first component.
Claim 5
Dependent Claim
146 words
An underwater anchor structure comprising, a tubular body, a drill bit secured to the lower end of said tubular body, said tubular body being adapted to have cement flow therethrough for cementing the tubular body in an underwater bore drilled by said drill bit, a stop plate secured around the exterior of said tubular body at a position spaced from said drill bit the desired depth of bore to be drilled, means for releasably connecting a drill string to the upper end of said tubular body, a swivel joint having two components, means for releasably securing said two components together, means for rotatably mounting one of said components to said tubular body above said stop plate, the other of said components thereby being releasable from said tubular body, and a cable connected to said component of said swivel joint which is releasable from said tubular body.
Claim 6
Dependent Claim
146 words
An underwater anchor structure comprising, a tubular body, a drill bit secured to the lower end of said tubular body, said tubular body being adapted to have cement flow therethrough for cementing the tubular body in an underwater bore drilled by said drill bit, a stop plate secured around the exterior of said tubular body at a position spaced from said drill bit the desired depth of bore to be drilled, means for releasably connecting a drill string to the upper end of said tubular body, a swivel joint having two components, means for releasably securing said two components together, means for rotatably mounting one of said components to said tubular body above said stop plate, the other of said components thereby being releasable from said tubular body, and a cable connected to said component of said swivel joint which is releasable from said tubular body.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |