Abstract: A process for treating a pin having an external threaded portion and a box having an internal threaded portion wherein the process provides a threadable joint having a high galling resistance. One embodiment of the present invention includes applying a lubricant on the threaded portion of at least one of the pin and box. The threadable joint is made up by threadably engaging the threaded portions of the pin and box to a recommended torque according to the American Petroleum Institute and then breaking out the threaded joint. The making up and breaking out step with lubricant applied on the threaded portion of at least one of the pin and box is performed a plurality of times. One of the threaded portions of the pin and box is then case hardened. The threadable joint made from this process is highly resistant to galling without the requirement of any lubricant.

Abstract: A process for treating a pin having an external threaded portion and a box having an internal threaded portion wherein the process provides a threadable joint having a high galling resistance. One embodiment of the present invention includes applying a lubricant on the threaded portion of at least one of the pin and box. The threadable joint is made up by threadably engaging the threaded portions of the pin and box to a recommended torque according to the American Petroleum Institute and then breaking out the threaded joint. The making up and breaking out step with lubricant applied on the threaded portion of at least one of the pin and box is performed a plurality of times. One of the threaded portions of the pin and box is then case hardened. The threadable joint made from this process is highly resistant to galling without the requirement of any lubricant.

Abstract: A process for treating a pin having an external threaded portion and a box having an internal threaded portion wherein the process provides a threadable joint having a high galling resistance. One embodiment of the present invention includes applying a lubricant on the threaded portion of at least one of the pin and box. The threadable joint is made up by threadably engaging the threaded portions of the pin and box to a recommended torque according to the American Petroleum Institute and then breaking out the threaded joint. The making up and breaking out step with lubricant applied on the threaded portion of at least one of the pin and box is performed a plurality of times. One of the threaded portions of the pin and box is then case hardened. The threadable joint made from this process is highly resistant to galling without the requirement of any lubricant.

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.