Rolling propelling device for perforating pipe string of horizontal well with upward inclination angle

Abstract

The invention discloses a rolling propelling device for a perforating pipe string of a horizontal well with an upper dip angle, and relates to the technical field of perforating devices for perforation completion of oil fields. Comprising perforating gun barrels and a rolling propelling connector, and the rolling propelling connector is detachably connected between every two adjacent perforating gun barrels; the rolling propelling connector comprises a connector body, a rotating body, a rolling body, a steel ball and a conductive sealing communication assembly. The rotating body is connected to the side wall of the connector body. The rolling body is in rolling connection with the rotating body through the steel ball; the perforating gun barrel string is supported and eccentrically centralized by the rolling body; a conductive sealing communication assembly is installed in the connector body. The connection between the adjacent perforating gun barrels is stable, the friction resistance in the cable pumping and conveying process of the upper dip angle horizontal well perforating pipe string can be reduced, and gravity reversing can be prevented.

Description

technical field [0001] The invention relates to the technical field of perforation and completion perforation devices in oilfields, in particular to a rolling propulsion device for perforation pipe strings in up-dip horizontal wells. Background technique [0002] Perforation completion in oil and gas fields refers to running the casing in the production layer, sealing the production layer with cement, and then using perforating bullets to shoot through the casing and cement, and penetrate into the rock of some production layers to form a channel for oil and gas flow. Completion method for connecting pay zone and wellbore. Perforation is an operation activity in which special energy-gathering equipment is used to enter the predetermined layer of the wellbore to perform explosive openings to allow the fluid in the underground formation to enter the wellbore. In thin oil layers and fractured oil reservoirs, special structural wells such as highly deviated wells and horizontal ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the many deficiencies in the prior art, the present invention aims to provide a rolling propulsion device for perforation strings in up-dip horizontal wells to make up for the problems of low screening efficiency of single-degree-of-freedom vibrating screens and easy blockage of screens. At the same time, the parallel mechanism There are redundant motion components, which can reduce or eliminate the singular position of the mechanism, and the parallel mechanism is a low-coupling topology mechanism, which is beneficial to reduce the complexity of kinematics and dynamics analysis

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