Hydraulic power depressurization acceleration tool for deep drilling well bottom

A drilling and power technology, which is applied in the field of deep well drilling bottom-hole hydrodynamic depressurization and speed-up tools, can solve the problems of hindering the timely removal of bottom-hole cuttings, affecting the rock breaking efficiency of the drill bit, and increasing the wear of the drill bit, so as to improve the efficiency of rock breaking, The effect of prolonging the life of the drill bit and increasing the ROP

Inactive Publication Date: 2017-06-06
CNPC DRILLING RES INST +1
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AI Technical Summary

Problems solved by technology

The main reason is that the bottom hole pressure difference has a holding effect on the newly broken cuttings, which hinders the timely remov

Method used

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  • Hydraulic power depressurization acceleration tool for deep drilling well bottom

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Embodiment Construction

[0018] The following is attached figure 1 , describe the present invention in detail, as follows:

[0019] The deep well drilling bottom hole hydrodynamic decompression and speed-up tool consists of a solid phase collector 1, a solid guide tube 2, a turbo accelerator 3, a rotary sealer 4, a power connector 5, a cyclone separator 6, a support rod 7, and a deflector 8. Thread 9, drill pipe 10, solid discharge nozzle 11, external conical steel shell 12 of cyclone separator, and cyclone rotor 13.

[0020] The high-pressure and high-speed drilling fluid pumped into the ground through ground pressure impacts the turbo accelerator 3, and the axial flow of the drilling fluid drives the turbo accelerator 3 to rotate. The turbo accelerator 3 rotates at the same speed; the drilling fluid passing through the turbo accelerator 3 flows down along the gap between the inner wall of the drill pipe 10 and the cyclone accelerator, passes through the deflector 8 to buffer and change direction, a...

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Abstract

The invention relates to a hydraulic power depressurization acceleration tool for a deep drilling well bottom, which mainly consists of a solid-phase collector, a solid draft tube, a turbine accelerator, a rotational sealer, a power connector, a rotational flow separator, a support rod and a flow guider. The tool mainly aims at solves the problems that at the bottom of a deep well, the drilling fluid density is high, the chiphold down effect is serious, and the mechanical drilling rate is low. The concrete implementation mode of the hydraulic power depressurization acceleration tool for the deep drilling well bottom is as follows: high-pressure high-speed drilling fluid is pumped underground from the ground surface, the drilling fluid lashes the turbine accelerator to supply rotational power for the rotational flow separator, after the drilling fluid is separated by the rotational flow separator, the solid phase in the drilling fluid enters an annular space between the drilling rod and a stratum, and is brought back to the ground surface by the drilling fluid which moves upwards in the annular space, and the drilling fluid after separation flows downwards to enter a drill bit through the interior of a rotational flow rotor. By the hydraulic power depressurization acceleration tool, the power problem of tools can be solved, the separation efficiency of solid-phase particles in the drilling fluid is improved, meanwhile, the chiphold down effect at the bottom of the deep well is effectively reduced, the mechanical drilling rate is improved, the drill bit life is prolonged, and the cost is lowered.

Description

technical field [0001] The invention relates to a deep well drilling bottom-hole hydraulic pressure-reducing and speed-increasing tool, which belongs to a supporting device for oil and natural gas drilling, and in particular can reduce the density of drilling fluid at the bottom of the well, reduce the holding effect, reduce the wear of the drill bit, increase the drilling speed, and prolong the life of the drill bit. Background technique [0002] With the reduction of shallow oil and gas resources in the world, oil and gas exploration and development are gradually shifting to deep wells. The speed of drilling in deep formations directly affects the economic benefits of oil and gas exploration and development. However, deep drilling is subject to high formation pressure and requires a high density of drilling fluid. High-density drilling fluid greatly affects the speed of penetration. Urgent problems. [0003] As the drilling process continues and the drilling depth continu...

Claims

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Application Information

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IPC IPC(8): E21B4/02E21B21/00E21B21/08
CPCE21B4/02E21B21/002E21B21/08
Inventor 刘明鑫任威严葛云华查永进王灵碧韩树邱心明张建忠
Owner CNPC DRILLING RES INST
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