A flow self-adjusting drilling process efficiency device and positive circulation drilling equipment

Abstract

The present invention relates to the technical field of drilling machinery, in particular to a self-adjusting ring drilling process efficiency device, which includes a connecting pipe and a turbine part; The inner cavity of the pipe communicates with the inner cavity of the spaced drill pipe; the turbine part is rotatably sleeved on the connecting pipe; the blades of the turbine part are hollow and communicated with the inner cavity of the connecting pipe; the blades are connected to the drill pipe There is a water passage between them, and the opening of the water passage can increase as the hydraulic pressure difference between the inside and outside of the drill pipe decreases. By setting the turbine part on the drill pipe above the drill bit, the flushing fluid and the cuttings in it are disturbed, and a relay is formed between the turbine parts to improve the ability to carry the cuttings; Increase to ensure the rotating speed of the turbine part in the depth of drilling, and further ensure the ability to carry cuttings.

Description

technical field [0001] The invention relates to the technical field of drilling machinery, in particular to a flow self-adjusting positive circulation drilling process efficiency device. Background technique [0002] In the positive circulation drilling process, the mud passes through the hollow drill pipe of the drilling rig at high pressure and shoots out from the bottom of the drill pipe. The drill bit at the bottom breaks the formation into cuttings when it rotates, is suspended by the mud, and overflows into the well as the mud rises. outside. In the existing technology, increasing the pump pressure within a certain range can increase the circulation speed of the positive circulation drilling flushing fluid and improve the sand-carrying capacity of the circulating fluid, but the requirements for equipment will increase a lot, and with the increase of drilling depth , Drilling will have higher and higher performance requirements for equipment, it will be more difficult ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of weak sediment-carrying ability, the present invention first sets no less than two automatically rotating turbine parts at intervals between the drill pipe above the drill bit, disturbs the flushing fluid and the drill cuttings therein, and forms a relay between the turbine parts to improve The ability to carry cuttings; at the same time, a water outlet is set at the end of the blade of the turbine part, and the direction of the water outlet is tangent to the rotation trajectory of the outlet end of the elbow, so under the impact of the water flow, the flushing fluid forms a spiral upward vortex, further improving the ability to carry cuttings ; Since the deeper the drill pipe, the smaller the internal and external pressure difference, which is not conducive to the rotation of the deep disturbance part, the invention further sets the opening of the water passage between the drill pipe and the blade to be able to decrease with the hydraulic pressure difference between the inside and outside of the drill pipe and increase to ensure the speed of the turbine part at the depth of the well

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