Blowout preventers having shear rams
A blowout preventer, is described comprising a housing having a bore therethrough and opposed guideways therein intersecting the bore, a ram movable within each guideway toward and away from one another. Each ram has a cutting edge on its inner end for moving across the cutting edge of the ram in the other guideway in order to shear a pipe within the bore, as the rams move toward one another, and means for sealing between the rams above the cutting edges and between each ram and the guideway in order to close the bore, upon shearing of the pipe and continued movement of the rams toward one another, also included are means carried by the rams for gripping opposite sides of the pipe as the rams move toward one another to shear the pipe, and lifting the upper sheared end of the gripped pipe out of the path of the means for sealing between the rams, as the rams continue to move toward one another.
- Assignee:
- Koomey Blowout Preventers, Inc., Brookshire, TX
- Patent Number(s):
- US 4580626
- OSTI ID:
- 5848202
- Country of Publication:
- United States
- Language:
- English
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