Weatherford/lamb, Inc.

Joerg-Erich Schulze-Beckinghausen

Bernd-Georg Pietras

Andreas Carlsson

Jorg Lorenz

An apparatus for facilitating the connection of pipes comprises a rotary ( ) and a stator ( ), the rotary comprising at least one hydraulically actuated jaw ( ), and a pump ( ) arranged on the rotary ( ) for pumping hydraulic fluid for actuation of the or each jaw ( ), the stator comprising a motor ( ) arranged on the stator ( ), so that rotational energy can be transferred from the motor to the pump in an operational configuration.

Apparatus and method for facilitating the connection of pipes

A gripping arrangement for gripping casing is both sufficiently flexible to conform to said casing and substantially inelastic. In a preferred embodiment the gripping arrangement comprises a sheet of zircon paper bonded to a flexible metal carrier plate which has side flanges which fit into an arcuate recess in a jaw holder and bear against the ends of an arcuate pad of resilient elastomeric material. In use, radial forces are applied uniformly through the arcuate paid whilst circumferential forces are transmitted through the flexible metal carrier plate and the side flanges to the arcuate pad and thus to the jaw holder.

Gripping arrangement for gripping casing

A positioning device comprising a first flexible member and a second flexible member which can be engaged to form a rigid member, wherein said first flexible member comprises a chain provided with a plurality of compression members, and said second flexible member comprises a locking chain which, when said first flexible member and said second flexible member are brought together inhibits separation of said compression members, characterized in that said compression members are planar.

Positioning device

An apparatus for gripping a pipe comprises an outer member having at least one inclined inner surface and an inner member having an inclined outer surface, a tubular member having an opening to accommodate said inner member and a threaded part, and a threaded gear engaged with the threaded part of the tubular member. On rotation of the threaded gear the tubular member moves the inner member which co-operates with the outer member so that said inner member moves towards a pipe to be gripped. The apparatus is particularly useful for applying 'non-marking' jaws to the outside of tubulars in the oil and gas industry.

Apparatus for gripping a pipe

Positioning apparatus for a power tong

WO 90/06418 discloses a dynamic torque transmitting arrangement which inhibits a power tong and a back-up tong tending to move out of axial alignment whilst coupling or uncoupling adjacent pipes. In the mechanical arrangement disclosed the minimum distance between the power tong and the back-up tong is limited by a strap. In the present invention flanges are mounted on opposite sides of the top of the power tong. Tension arms are pivotally mounted on the flanges and are connected by a hollow tube. Straps are pivotally mounted at one end to the tension arms and at the other end to hollow pillars on which the back-up tong is slideably mounted. When the power tong and the back-up tong are in close proximity the straps are disposed to either side of the power tong. The back-up tong is supported from the power tong by rods which are connected to plates on which the hollow pillars rest.

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Garbsen, Germany

Joerg-Erich Schulze-Beckinghausen