Patent ID: 8052176
Filing Date: 2011-11-08
Classification: E21B,F16L

Abstract:
1. A bottom hole assembly tool component comprising a connection apparatus adapted to allow connection of one substantially tubular bottom hole assembly tool component member to another substantially tubular bottom hole assembly tool component member, the connection apparatus comprising: a male connecting member having a thread thereon; a female connecting member having a thread thereon; wherein the threads of the male and female connecting members are arranged to screw together to form a co-operable attachment mechanism; wherein the male and female connecting members each comprises at least one primary surface located at one end of the respective threads and are, together, adapted to form a primary load bearing shoulder joint such that each of the at least one primary surface of the male connecting member contacts at least one primary surface of the female connecting member at an angle greater than zero degrees to a longitudinal axis of the connection apparatus and further each comprises at least one secondary surface adapted to form a secondary load bearing shoulder joint such that each of the at least one secondary surface of the male connecting member contacts at least one secondary surface of the female connecting member at an angle greater than zero degrees to the longitudinal axis; wherein the respective threads of the male and female connecting members are substantially parallel to the longitudinal axis and are located in between each of the respective at least one primary and secondary surfaces; wherein each of the at least one primary surfaces of the male and female connecting members is formed at the same angle to the longitudinal axis of the male and female connecting members, respectively, wherein the secondary surfaces of each of the male and female connecting members are formed at the same angle to the longitudinal axis of the male and female connecting members, respectively, wherein each of the at least one secondary surface of the male connecting member comprises a longitudinally outermost end face and a tapered wall and a flat wall on the longitudinally outermost end face, the tapered wall being angled from radially innermost to outermost, away from the parallel threads, and wherein each of the at least one secondary surface of the male member is substantially perpendicular to the longitudinal axis.