Title:
METHOD AND APPARATUS FOR PREVENTING BLOW-OFF OF OIL OR GAS WELL
Document Type and Number:
Japanese Patent JPS6153993
Kind Code:
A
Abstract:
A blowout preventer of the cross ram type has at least a first and second pair of rams which are in the same plane or on the same level. The rams are reciprocable in insertable sleeve-like ram guideways which are replaceable to accommodate different types of rams; for example, a pipe ram or blind ram, or different configurations of rams from different manufacturers. This provides a blowout to preventer which has flexible functions and a low stack height and low weight. A spherical shape also provides lower weight, ease of guideway insertion, and reduction of stress concentrations.
Inventors:
CHIYAARUZU JIYOSEFU MIRAA
Application Number:
JP9943985A
Publication Date:
March 18, 1986
Filing Date:
May 10, 1985
Export Citation:
Assignee:
CHIYAARUZU JIYOSEFU MIRAA
International Classes:
E21B33/06; (IPC1-7): E21B33/06
Attorney, Agent or Firm:
Minoru Nakamura
Previous Patent: The separator for nonaqueous electrolyte rechargeable batteries
Next Patent: JPS6153994
Next Patent: JPS6153994