Abstract In an offshore oil well production system including a surface platform, a submerged wellhead, and a pipe string interconnecting the wellhead and platform, the provision of a pipe shear and shut-off apparatus between the platform and wellhead having a housing with a through-bore with an enlarged intermediate chamber and end bores for receiving a section of the pipe and means within the apparatus for shearing the pipe and closing the fluid passage through the apparatus when the pipe is severed, means for selective actuation of the apparatus and remote control means for the actuating means which is operative at a remote location from the wellhead notwithstanding the loss of physical connection between the platform and wellhead through the pipe string, such as when the pipe string is ruptured.
Inventors
👤 V Orund
👤 E Cugini
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-27 05:18
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/12; E21B29/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
In an offshore oil well production system, comprising a surface platform, an undersea wellhead, and a pipe string connected to the wellhead and the platform, the provision of: a submerged pipe shear and shut-off apparatus between said platform and said wellhead including, a housing having a through-bore with an enlarged intermediate chamber and end bores for receiving the pipe, means within said chamber for shearing said pipe, closing means within said chamber for preventing fluid passage through said housing after said pipe is severed; said sumbmerged pipe shear and shut-off apparatus shearing means including slidably mounted blade means for movement transverse to said pipe to effect cut-off and said closing means includes a shut-off plug slidably mounted for movement transverse to said pipe to an operative position, said apparatus additionally including means urging said shut-off plug into sealing relation with said housing through-bore; means for selective actuation of said apparatus; and remote control means for said actuating means operative at a remote location from said wellhead.
Claim 2
Dependent Claim
166 words
In an offshore oil well production system, comprising a surface platform, an undersea wellhead, and a pipe string connected to the wellhead and the platform, the provision of: a submerged pipe shear and shut-off apparatus between said platform and said wellhead including, a housing having a through-bore with an enlarged intermediate chamber and end bores for receiving the pipe, means within said chamber for shearing said pipe, closing means within said chamber for preventing fluid passage through said housing after said pipe is severed; said sumbmerged pipe shear and shut-off apparatus shearing means including slidably mounted blade means for movement transverse to said pipe to effect cut-off and said closing means includes a shut-off plug slidably mounted for movement transverse to said pipe to an operative position, said apparatus additionally including means urging said shut-off plug into sealing relation with said housing through-bore; means for selective actuation of said apparatus; and remote control means for said actuating means operative at a remote location from said wellhead.