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
👤 H Garrett
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-08 21:41
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/08; E21B29/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
A method for sealing off a well bore having at least one pipe extending thereinto comprising placing in said well bore a body having a bore there-through for the passage of said pipe, severing said pipe at a point which is within the bore of said body, and moving a blocking means through the severance in said pipe, said blocking means serving to completely shut-off the bore in said body and said pipe extending through said bore in said body.
Claim 2
Independent Claim
80 words
A method for sealing off a well bore having at least one pipe extending thereinto comprising placing in said well bore a body having a bore there-through for the passage of said pipe, severing said pipe at a point which is within the bore of said body, and moving a blocking means through the severance in said pipe, said blocking means serving to completely shut-off the bore in said body and said pipe extending through said bore in said body.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein said body is secured in said well bore by cementing said body therein.
Claim 4
Dependent Claim
38 words
The method of claim 1 wherein said blocking means is moved through the severance in said pipe by igniting a propelling explosive and permitting the force of the resulting explosion to move said blocking means through said severance.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein said severing of said pipe is accomplished by subjecting said pipe to a severing explosive.
Claim 6
Dependent Claim
13 words
The method of claim 4 wherein said severing explosive comprises a shaped charge.