Title:
WELL HEAD ASSEMBLY
Document Type and Number:
Japanese Patent JPS58173290
Kind Code:
A
Abstract:
A wellhead assembly with an increased through bore for passing slightly oversized drill bits therethrough with a substantially reduced landing shoulder, and an improved landing assembly which transfers a portion of the stresses through the energizing ring and support ring into the wellhead body along the straight bore above said landing shoulder.
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Inventors:
JIERII DEII SUMISU
EDOWAADO JIEI SUJIMATSUKUZATSU
EDOWAADO JIEI SUJIMATSUKUZATSU
Application Number:
JP4304083A
Publication Date:
October 12, 1983
Filing Date:
March 15, 1983
Export Citation:
Assignee:
CAMERON IRON WORKS INC
International Classes:
E21B17/10; E21B33/03; E21B33/04; (IPC1-7): E21B33/03
Attorney, Agent or Firm:
Kyozo Yuasa