| 摘要 |
Connection apparatus comprising a male connecting member (114) and a female connecting member (116). A co-operable attachment mechanism (118,120) is provided on the male and female connecting members (114,116). The male and female connecting members (114,116) each comprise at least one primary surface (142) adapted to form a primary joint and further each comprise at least one secondary surface (140) adapted to form a secondary joint. At least one primary surface (142) can be adapted to form a primary load bearing shoulder joint (128). At least one secondary surface (140) is adapted to form a secondary load bearing shoulder joint (130). The connection apparatus typically provides a double shoulder high torque connection for downhole tubulars.
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