Water pressure torsional impact device for well drilling

Abstract

The invention relates to a water pressure torsional impact device for drilling engineering. The water pressure torsional impact device adopts the technical scheme that the water pressure torsional impact device for the well drilling is characterized in that a water pressure torsional impact generator mainly comprises a flow guide location cover, an upper rotating gland, an impact rammer, an impact rammer seat, a steering divider, a cutoff nozzle and a lower rotating gland, wherein the flow guide location cover, the upper rotating gland, the impact rammer seat and the lower rotating gland are fastened with a drilling bit mounting seat by bolts; through holes are formed in axes of the impact rammer, the impact rammer seat and the steering divider; the through hole in the axis of the impact rammer is sleeved with the steering divider; the impact rammer is arranged on the through hole in the axis of the impact rammer seat; with the adoption of the scheme, the water pressure torsional impact device overcomes defects in the prior art, and a downhole tool capable of increasing the rate of penetration in a harder or abrasive stratum and avoiding stick-slip of a PDC (polycrystalline diamond compact) drilling bit is provided.

Description

technical field [0001] The invention relates to a hydraulic torsional impact device used in drilling engineering. Background technique [0002] The existing drill bits have the following problems in the use process: (1) During the drilling process, the drill bit usually has sticking, slipping, and drill sticking phenomena, and the drill string is always tightened like a clockwork, and it is released quickly after the torque is accumulated. , This kind of engineering problem is relatively serious, the torsional vibration of the drill string makes the whole drilling process unstable, and has an adverse effect on the service life of the drill bit and the supporting parts of the drill string. (2) For hard formations or abrasive formations, the penetration depth of the drill bit is not enough, and the ROP needs to be improved. [0003] At present, all kinds of rotary punching or punching rotary tools used in drilling operations can only produce axial impact force, not only will ...

AI Technical Summary

Problems solved by technology

[0002] The existing drill bits have the following problems in the use process: (1) During the drilling process, the drill bit usually has sticking, slipping, and drill sticking phenomena, and the drill string is always tightened like a clockwork, and it is released quickly after the torque is accumulated. , this kind of engineering problem is more serious, the torsional vibration of the drill string makes the whole drilling process unstable, and has an adverse effect on the service life of the drill bit and the supporting parts of the drill string

(2) For hard formations or abrasive formations, the drilling depth of the drill bit is not enough, and the ROP needs to be improved

Among them, the torsional impact generator in the prior art (patent number: US 6742609B2) uses a turbine-driven impact hammer to generate high-frequency torsional impact, and the torsional impact drilling tool of Southwest Petroleum University (patent application number: 200910058083.9) uses a screw drill to drive an impact hammer , these two drilling tools have many wearing parts and consume a large pressure drop

Images