Abstract: Electric connector, including first and second connector parts which can be coupled to each other and comprise first and second contact elements, and first and second supports, respectively, which support the first and second connector parts, respectively, and can be assembled to each other by means of a screw- or bayonet-fitting. The first connector part comprises a resilient support structure, a proximal end thereof being made integral with the first support, and a distal end thereof supporting the first contact element. The second connector part comprises an abutment ring which is suitable to be slidingly engaged by the first contact element during the fitting between the first and second supports. The second contact element is located at a limited circumferential arc of the abutment ring, and a stop projection is provided which is suitable to stop the first contact element at the second contact element in order to provide the coupling with the connector parts.

Abstract: Electric connector, including first and second connector parts which can be coupled to each other and comprise first and second contact elements, and first and second supports, respectively, which support the first and second connector parts, respectively, and can be assembled to each other by means of a screw- or bayonet-fitting. The first connector part comprises a resilient support structure, a proximal end thereof being made integral with the first support, and a distal end thereof supporting the first contact element. The second connector part comprises an abutment ring which is suitable to be slidingly engaged by the first contact element during the fitting between the first and second supports. The second contact element is located at a limited circumferential arc of the abutment ring, and a stop projection is provided which is suitable to stop the first contact element at the second contact element in order to provide the coupling with the connector parts.

Abstract: A thread spacer for drill pipe with an attached flange is disclosed that is designed to easily break away from a thin thread spacer body. Also disclosed is a thread spacer with a separate flange, the thread spacer and flange each independently fixed to the drill pipe. The thread spacer assembly may include none, one or two flanges, for single or double shouldered threaded connections. In addition, a flange for a thread spacer is disclosed which has a thickness that takes into consideration not only the displacement in the pipes caused by the insertion of the thread spacer, but also compensated to provide the same stress on the shoulders as the joined pipes without a thread spacer. Thread spacer and flange retention apparatus are also disclosed, which retain the flange and/or thread spacer on the pipe connections when the pipes are separated.