US3684008A Expired / Lapsed US ⏱️ 0.0 years remaining

Well bore blocking means and method

Assignee: Individual

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Filing: 1970-07-16

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Granted: 1972-08-15

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Expires: 1990-07-16

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Abstract

Abstract A blow-out preventer comprising a relatively large body means which is placed in a well bore. The body means is provided with a bore through which drill pipe and the like can extend. Traversing the bore through the body is a slideway in which is mounted a slide or blocking means. Using a suitable means of propulsion, the slide or blocking means can be moved from a position from within the slideway of non-engagement with the bore extending through the body to a position where the slide completely intersects or blocks the bore in the body. The propulsion means can be activated automatically or manually from the surface or automatically from below the surface. When the blowout preventer is used in well bores wherein drill strings or production tubing extend through the body, the apparatus is provided with a severing means which first acts to sever the pipe extending through the bore at which point the slide or blocking means is forced through the space between the severed end to completely seal off the well bore. In cases where no drill pipe or the like extends through the bore of the body means, the severing means can be dispensed with and the well bore blocked off simply by propelling the slide into the closed position, i.e. intersecting the bore.

Inventors

👤 Henry U Garrett

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-11-04 14:56

CPC Classifications

E; E21; E21B; E21B29/00; E21B29/02; E21B29/08

Claims Analysis

Total Claims: 11

Claim 1

Independent Claim 96 words

An apparatus for sub-surface closing of a well bore comprising body means having a bore therethrough for the passage of pipes, said body means having in addition a slideway intersecting said bore, means for anchoring said body in said well bore whereby said bore in said body is substantially coaxial with said well bore, and slide means movably mounted in said slideway, said slide means being movable from a position wherein said bore in said body is substantially unobstructed by said slide means to a position wherein said slide means blocks said bore in said body.

Claim 2

Independent Claim 96 words

Claim 3

Dependent Claim 27 words

The apparatus of claim 1 wherein said slideway and the part of said bore above the intersection of said slideway and said bore form an acute angle.

Claim 4

Dependent Claim 54 words

The apparatus of claim 1 including means within said body for severing pipes extending through said bore in said body, said means for severing being located so as to sever pipes extending through said bore in said body in a region substantially at the intersection of said slideway and said bore in said body.

Claim 5

Dependent Claim 59 words

The apparatus of claim 3 wherein said slide means has an opening extending therethrough, said opening being positionable in register with said bore through said body by movement of said slide means in said slideway, and said means for severing comprises a severing explosive located in said slide means in surrounding relationship to said opening in said slide means.

Claim 6

Dependent Claim 17 words

The apparatus of claim 4 wherein said severing explosive in said slide means comprises a shaped charge.

Claim 7

Dependent Claim 64 words

The apparatus of claim 1 wherein said means for moving said slide means includes a piston means on one end of said slide means, said piston means being movably mounted in a piston chamber in said body, and means to apply force against said piston means to move said piston means in said piston chamber and thereby move said slide means in said slideway.

Claim 8

Dependent Claim 65 words

The apparatus of claim 6 wherein said means to apply force to said piston means comprises a propelling explosive, said propelling explosive being contained in an explosion chamber located within said body, at least a Portion of the wall of said explosion chamber being formed by said piston means whereby when said propelling explosive is ignited, said piston means is moved through said piston chamber.

Claim 9

Dependent Claim 59 words

The apparatus of claim 7 wherein said slide means has an opening extending therethrough, said opening being positionable in register with said bore through said body by movement of said slide means in said slideway, and said means for severing comprises a severing explosive located in said slide means in surrounding relationship to said opening in said slide means.

Claim 10

Dependent Claim 30 words

The apparatus of claim 8 including means ignitably connecting said propelling explosive with said severing explosive such that ignition of said propelling explosive results in ignition of said severing explosive.

Claim 11

Dependent Claim 56 words

The apparatus of claim 9 wherein said means ignitably connecting said propelling explosive with said severing explosive comprises a cord-type explosive medium, said cord-type explosive medium being positioned throughout the length of a passage extending through said piston means and said slide means and connecting said propelling explosive with said severing explosive in said slide means.

References Cited (Backward Citations)

US2761384A Cited

US2919111A Cited

US2969838A Cited

US3561526A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1975-08-15	1976-02-14	1976-08-15	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1979-08-15	1980-02-14	1980-08-15	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1983-08-15	1984-02-14	1984-08-15	$7700.00	Window Closed / Lapsed

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