Engineering & Drilling Machinery As

Bj&oslash;rn Eilertsen

John Daniel Madsen

A rotary table for a drill string, including a stationary frame having a rotating part arranged therein, and hydraulic equipment such as hydraulic slips (wedge-shaped holding collars) and a hydraulic clamp on the rotating part, and also hydraulic power transmission between the stationary part and the rotating part. The hydraulic power transmission for each individual piece of hydraulic equipment includes a hydraulic motor ( ) in the stationary frame ( ), a hydraulic pump ( ) in the rotating part ( ), and a ring ( ) provided with internal and external toothing, wherein the internal toothing is in driving engagement with a gearwheel ( ) on an input shaft in the hydraulic pump and the external toothing is in driving engagement with a gearwheel ( ) on an input shaft in the hydraulic pump and the external toothing is arranged for engageable and disengageable driving interaction with a gearwheel ( ) on an output shaft in the hydraulic motor.

Rotary table

A derrick, especially a drilling rig derrick, including a derrick structure and lifting tackle for a load, for example, a drill string, in the derrick structure. The lifting tackle includes guideways in parallel relation which each includes a vertical main guide rail ( ), a storage guide rail ( ) parallel thereto, and in a lower portion of the derrick a connecting guide portion ( ) between the two said rails, a rack ( ) are slidably arranged in each guideway which racks ( ) are divided into successive, preferably hingedly interconnected rack segments ( ) designed to bear against one another when the rack ( ) or when a part thereof is in the vertical main guide rail ( ) the main guide rail ( ) being designed for horizontal support of the rack segment ( ), a load-being yoke ( ) supported on the rack ( ) in the respective vertical main guide rails ( ), and a driving gear ( ) including a driving gearwheel ( ) in driving engagement with the rack ( ), in the respective vertical guide rails ( ).

Tower

An apparatus for preventing pipe buckling when downwardly directed axial forces are applied to a pipeline (,) which extends from a derrick (,) down into a well bore, especially when snubbing. The apparatus comprises two sets of pipe supports (,) linked together to give a continuous chain (,), which is arranged to extend from a respective guide rail (,) in the derrick (,) to the pipeline (,), and the pipe supports (,) are movably arranged in the guide rail (,) parallel to the pipeline (,). The guide rail (,) extends in a general U-shape with the U-bend (,) located closest to the lower end of the derrick (,) and comprises two legs (,), of which a first leg (,) is arranged close to the pipeline (,) and a second leg (,) is arranged at a greater distance from the pipeline. The pipe supports (,) are designed to be placed in the first leg (,) when operative, and are designed to be transferred to the second leg (,) when they are to be rendered inoperative.

Device for preventing pipe buckling

A drill floor hole comprising a through-going vertical opening in a drill floor. A pipe holder is mounted so as to be capable of vertical movement below the opening. The pipe holder is suspended in a pulley loop in a wire drive wherein a wire is attached to the drill floor, runs down and over the pulley loop and passes up to a winch.

Growing community of inventors

Hundvåg, Norway

Bjørn Eilertsen

Growing community of inventors

Hundvåg, Norway

Bj&oslash;rn Eilertsen

Bjørn Eilertsen