Slips

Slips

Slips are used to grip the drill string or casing during connection and tripping. They contain dies and inserts allowing them to grip the outside diameter of the pipe. They fit around the pipes while lowering them and go into the opening within the rotary table. Slips, that handle larger diameters of pipes "Casings", do not go into the rotary table, but are put on the top of the rig floor. This type of slips are called spiders. Some slips are ordinary or without any powering system. Others are operated by powering systems "using spring coil or compressed air". Automatic slips are a new technology of slips which are operated without the Roughnecks. There are many types of slips such as drill pipe rotary slips, drill collar slips, drill pipe…
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P.D.M

P.D.M

The P.D.M is one of the two kinds of the downhole motors. The Positive Displacement Motor is a hydraulic motor. Its pumping system depends on the Moineau principle to rotate the bit. The main four components are: A) By-pass valve (dump sub) :- This valve allows the pass of the drilling fluids to the hole while tripping in, besides the drainage of the fluids while tripping out. The common type is the spring piston valve which allows the mud to flow through the tool under pressure. When the downward pressure is removed, the spring opens a channel of flow to make the fluid extract through the annulus. B) Motor section:- This part depends on the reverse application of the Moineau principle. It consists of a rubber stator and a steel…
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