Circumferential impact assembly

Abstract

The invention relates to the technical field of drilling equipment, in particular to a circumferential impact assembly. The circumferential impact assembly comprises a valve plate, arc-shaped bosses,an impact hammer, a front vertical boss, a rear vertical boss, a left hammer body, a right hammer body, an anvil and flow limiting pieces, a mandrel mounting cavity which is through up and down is formed in the middle of the valve plate, the four arc-shaped bosses are uniformly distributed on the outer side of the valve plate in the circumferential direction at intervals, the arc-shaped boss located on the front side of the valve plate is a front boss, and a front arc-shaped notch with an upward opening is formed in the middle of the front boss. The circumferential impact assembly is reasonable and compact in structure and convenient to use, a first inclined hole, a second inclined hole, a third inclined hole and a fourth inclined hole are formed, and the flow limiting pieces are installedin the first inclined hole, the second inclined hole, the third inclined hole and the fourth inclined hole, so that a negative pressure area is formed in an anvil inner cavity below the correspondingvalve plate to generate a strong negative pressure suction effect, irregular vortexes formed among the valve plate, the impact hammer and the anvil due to reverse backflow of a drilling fluid are avoided, erosion of the drilling fluid to the valve plate, the impact hammer and the anvil is accordingly reduced, and the circumferential impact assembly has the advantages of being efficient, continuous, reliable and long in service life.

Description

technical field [0001] The invention relates to the technical field of drilling equipment, and relates to a circumferential impact assembly. Background technique [0002] In the process of oilfield exploration and development, increasing the ROP is an eternal goal pursued by the oilfield development industry. At present, many different types of drilling speed-increasing tools have been developed at home and abroad and put into field test applications, and good results have been achieved. Existing drilling speed-up tools mainly achieve the speed-up effect by applying impact to the drill bit. According to the form of impact, they can be divided into axial impact speed-up devices and circumferential impact speed-up tools. The circumferential impact speed-up tool improves the working state of the PDC bit by applying periodic high-frequency circumferential impact force to the bit, improves the rock-breaking efficiency of the PDC bit, and then increases the ROP; at the same time,...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a circumferential impact assembly, which overcomes the deficiencies of the prior art and can effectively solve the problems of the existing torsion impactors that the core components are easily damaged by erosion and the continuous circumferential impact effect is poor

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