Blowout preventer and improved ram packer structure
Patent
·
OSTI ID:5862377
A blowout preventer is described having a housing with a bore extending therethrough and guideways intersecting the bore. It has a ram in each of the guideways, a packer in the face of each of the rams, a recess between the back of each packer and the face of the ram into which the packer can expand to partially reduce the sealing pressure on the packers and at least one passage communicating from the bore below the guideways to the recess to transmit well pressure to the recess.
- Assignee:
- Cameron Iron Works Inc
- Patent Number(s):
- US 4265424
- OSTI ID:
- 5862377
- Country of Publication:
- United States
- Language:
- English
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