A full-rotation hydraulic internal push-type high-build slope rotary guide tool

Abstract

The invention mainly belongs to the technical field of rotary guide systems, and particularly relates to a full-rotation hydraulic inward-pushing-type high-build-up-rate rotation guide tool. The full-rotation hydraulic inward-pushing-type high-build-up-rate rotation guide tool adopts a hydraulic system driven by a turbine and a generator set to convert the energy of the pressure mud into the hydraulic energy. By adopting the hydraulic system driven by the turbine and the generator set, the power is provided for a piston through the hydraulic mode, so that the lateral force obtained by a drillbit is larger. Meanwhile, the hinged mode is adopted, so that the optimal steering capability is achieved. As a result, the high build-up rate is easier to achieve. The hydraulic piston pushes againstthe inner wall of a lower rotating sleeve instead of the wall of a well, so that the abrasion can be reduced. At the same time, only one set of pushing piston assemblies is pushed out at the same moment, so that the unnecessary work is reduced. The service life of the piston is prolonged.

Description

technical field [0001] The invention mainly belongs to the technical field of rotary steerable systems, and in particular relates to a full-rotation hydraulic internal push type high-inclination-rate rotary steerable tool. Background technique [0002] Rotary steerable technology belongs to the field of directional drilling, and is mainly used for three-position trajectory well drilling such as directional wells, horizontal wells, and extended-reach wells. Relying on its own high-precision servo control mechanism and high-precision attitude measurement sensor, it can accurately control the drilling direction of the drill bit in real time, thereby realizing the control of the wellbore trajectory. [0003] In the prior art, take Baker Hughes' AutoTrak Curve rotary steerable tool and Schlumberger's PD Archer rotary steerable tool as examples. The AutoTrak Curve rotary steerable tool uses three sets of hydraulic pushing cylinders and their attached ribs to push against the well...

AI Technical Summary

Problems solved by technology

[0005] 1) Three sets of highly integrated motor-pump-hydraulic module assemblies with independent control are used, which are expensive and the cost of later maintenance is also high

[0006] 2) The bending of the upper part of the rotary steerable tool consumes the pushing force, and at the same time, the bending caused by the pushing force increases the bending stress of the upper drill string. The strength requirements are high, and the pusher pushes against the well wall, resulting in high wear and tear;

[0007] 3) The rotating guide tool is set without rotating the jacket, and the guide tool is not easy to realize the back-cutting operation and there is a risk of drill sticking;

[0009] 5) The disc valve used for flow distribution is a normally open structure, and the rotary guiding tool pushes against the palm and still pushes back and forth against the well wall to work in the process of not needing guidance, resulting in a lower life of the piston seal

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