Dynamic push-abutting type rotary motor

Abstract

The invention discloses a dynamic push-abutting type rotary motor used by cooperating with a drill bit. Power is supplied to the drill bit at the position near the drill bit, the drilling rate can beeffectively increased, and the dynamic push-abutting type rotary motor can be used for various drilling technologies such as deep drilling, vertical drilling and a large-displacement horizontal well.The dynamic push-abutting type rotary motor comprises an outer pipe, an upper connector, an upper support, an upper centering ring, a rotor assembly, a sealing rod, a stator, a flow distribution valve, a lower supporting ring, a lower support, a connecting shaft, a connecting sleeve, a lower connector and a main shaft; and the rotor assembly comprises a rotor body and four rotor pushing blocks, and a reset block is arranged between the stator and the rotor assembly. According to the dynamic push-abutting type rotary motor, all the parts are metallic parts and high-temperature-resistant parts,and therefore the dynamic push-abutting type rotary motor can be used in a high-temperature environment at 250 DEG C or above. A volumetric fluid pressure transfer mechanism is applied in the workingprocess of the motor, the advantages of a screw motor are inherited well, no rubber part is used for sealing, and therefore the service life of the motor is effectively prolonged.

Description

technical field [0001] The invention belongs to the field of drilling, and in particular relates to a dynamic pushing type rotary motor. Background technique [0002] At present, my country's exploration and development projects for unconventional oil and gas resources such as deep mineral resources, geothermal energy, shale oil, shale gas, coal bed methane and natural gas hydrate are increasing year by year. Advanced drilling techniques such as wireline coring, vertical drilling, extended-reach horizontal wells, butt wells, and underbalanced drilling used in drilling have also made great progress. The downhole dynamic drilling tool is the core tool used in various drilling processes. Practice has shown that the downhole dynamic drilling tool can enable the drill bit to achieve a higher mechanical penetration rate and greatly reduce the drilling cost. [0003] Downhole dynamic drilling tools mainly contain two types in the prior art, one is a vane type turbo drilling tool, ...

AI Technical Summary

Problems solved by technology

In addition, the rubber bushing between the stator and the rotor is easy to wear during the working process, resulting in motor leakage and failure, and the conventional rubber stator usually has a temperature resistance of <120°C. In some special process blocks that require high temperature resistance, the service life of the screw motor is short

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