Patent ID: 6422782
Filing Date: 2002-07-23
Classification: E21B,Y10T

Abstract:
A joint, comprising:a pair of first and second members; a projection extending in a lengthwise direction from one of the members, a socket in an end of the other of the members, which socket is sized to slidingly receive the projection; a first set of alignable transverse holes in the projection and in a wall defining the socket, which openings are configured to receive a removable pin for mechanically interlocking the projection in the socket; a second set of alignable transverse holes in the projection and in a wall defining the socket, which holes are configured to receive a removable retainer for mechanically interlocking the pin in the first set of alignable transverse holes; and wherein the second set of alignable transverse holes at least partially intersects the first set of alignable transverse holes, whereby when a pin is inserted in the first set of holes, a retainer for engaging the pin may be inserted in the second set of holes in a manner effective to engage the pin, so that the pin remains in the first set of alignable transverse holes. 2.The joint of claim 1, further comprising the pin and the retainer.