A circumferential and axial negative pressure impact speed-increasing tool

Abstract

The invention provides a circumferential axial negative pressure impact speeding-up tool. The speeding-up tool comprises an outer barrel, a fixed valve seat, a fixed valve block, a movable valve block, an impact barrel, an impact hammer, a reversing valve and a ball bearing, wherein a main valve and a control valve which are mutually in reversing control are arranged in the tool, the inner wall surface of the impact barrel and the outer wall surface of the impact hammer form the main valve, the inner wall surface of the impact hammer and the outer wall surface of the reversing valve form the control valve, the impact hammer and the reversing valve reciprocate when being driven by drilling fluid, a movable-fixed valve group is also arranged in the tool, a movable valve is fixedly connected with the impact hammer, and the movable-fixed valve realizes opening and closing of a central runner by virtue of swinging of the impact hammer. By adopting the structure, the speeding-up tool provided by the invention has the beneficial effects that one circumferential and high-frequency impact is applied to a drill bit by virtue of reciprocating impact of the impact hammer, and stick-slip vibration phenomenon of the drill bit is obviously improved; a drilling column runner is periodically opened and closed by virtue of the movable-fixed valve group, an instant negative pressure pulse is formed at shaft bottom, chip hold down and repeated breaking are reduced, negative pressure pulse well drilling is realized, and mechanical drilling rate is improved.

Description

technical field [0001] The invention relates to the technical field of increasing drilling speed in oil and natural gas production, and relates to a circumferential axial negative pressure impact tool for increasing drilling speed. Background technique [0002] With the continuous increase of drilling difficulty and drilling depth, especially in deep wells and ultra-deep wells, the problems of low mechanical penetration rate, long drilling cycle and high drilling cost are particularly obvious. Improving the rock breaking efficiency of the drill bit, increasing the drilling speed and shortening the cycle are drilling technologies. The goal that has been pursued. [0003] The most important step in increasing the drilling speed is to improve the crushing efficiency. The pulse jet technology is a technology that can effectively improve the rock breaking efficiency. The distribution of the cuttings bed increases the speed of cuttings going up the bottom of the well, avoids repe...

AI Technical Summary

Problems solved by technology

Existing pulse jet acceleration tools such as the Chinese patent CN202152634U frequency-adjustable pulse jet acceleration tool and CN205025358U the conjugate rotary sealing valve that produces pulse jet are described in their structures. The opening and closing of the flow channel, under the action of the hydraulic pressure, produces an axial downward impact force, thereby increasing the ROP, but the phenomenon of tooth jumping frequently occurs in the PDC drill bit during drilling.

Aiming at the problem that the PDC drill bit is prone to jumping teeth due to stick-slip vibration, the Torkbuster torsional impactor proposed by Atra Company in the world generates high-frequency periodic torsional impacts inside the tool, so that the drill bit can continuously cut the formation and eliminate stick-slip vibration. Drilling speed; the existing torsion impact speed-increasing tool is described in the Chinese patent CN205135405U frequency-adjustable torsion impact speed-increasing tool and CN204984255U torsion impact speed-increasing tool. The impact force makes the drill bit continue to cut the formation, but its flow channel structure is complex, and the impact hammer produces limited hammer force

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