Abstract: A connector (1) for connecting to a tubular member has a body (5, 35, 65) with a bore (7, 37, 67) configured to receive the tubular member, the body having a wedge device (10, 40, 70) within the bore adapted to interact with the body to grip the tubular member (15) when the tubular member is disposed within the bore, wherein the wedge device is at least partially helical, and wherein the connector has an anti-rotation device (23, 53, 83) to restrict relative rotation of the wedge device and the body when the tubular is gripped in the bore.

Abstract: A quick-locking connector and method for use in the oil and gas industry. The quick-locking connector comprises male and female portions, which mate together in a non-coaxial hinged relationship. Rigid connection is achieved by guidance and location of spring-loaded buttons of the male portion into apertures of the female portion. The connector allows the female portion to be attached to a horizontal element, such as a horizontal drill pipe, and to mate with the male portion attached to a vertical element. In this configuration, lifting the male portion vertically upwards allows gravity to locate the spring-loaded buttons of the male portion into the female portion to provide rigid attachment at the connector such that the elements can be secured vertically inline with each other. The connector therefore provides a self lifting capability.

Abstract: A roller sub system for reducing friction between a tool string and a wall in a well bore for use in the oil and gas industry. The apparatus has a roller body and wheel sub system, which is configured to have removably mounted wheels of variable diameters. A plurality of different diameter wheel sets are described for mounting on the roller sub axles and orientating the system in the well bore. The wheels are fixed to the roller sub axles through a quick-release mechanism. A single apparatus can thus be employed with different diameter wheels to operate in well bores of variable diameters.