Rotary Sleeve Bottom Packing Device for Gravel Packing

Abstract

The invention provides a rotating sliding sleeve type bottom filling device for gravel fill. The rotating sliding sleeve type bottom filling device for gravel fill comprises a filling tool and a filling service tool. The filling tool comprises a filling cylinder and a rotating sliding sleeve capable of being rotationally arranged on the inner side of the filling cylinder in a sleeved mode, a first filling hole penetrates through the side wall of the filling cylinder, and a second filling hole penetrates through the side wall of the rotating sliding sleeve. The filling service tool is arranged in the filling tool in a penetrating mode and can reciprocate in the axial direction and drive the rotating sliding sleeve to rotate relative to the filling cylinder through the axial reciprocating motion. A filling cavity is formed inside the filling service tool, and a third filling hole penetrates through the side wall of the filling cavity. The rotating sliding sleeve type bottom filling device for gravel fill is provided with a forced-opening and forced-closing type switch mechanism, the switch mechanism can be infinitely opened and closed repeatedly without a spring, and the problem that in the prior art, normal closing cannot not be achieved due to the fatigue failure or insufficient reset force of a spring is solved.

Description

technical field [0001] The invention relates to sand control technology in petroleum engineering, in particular to a rotary sliding sleeve bottom filling device for gravel filling. Background technique [0002] Gravel packing sand control technology is one of the effective technologies for oil well sand control and sand production control, and is widely used in domestic and foreign petroleum industries. Among them, gravel packing devices / tools mainly include two types of top filling tools and bottom filling tools. At present, bottom gravel packing tools are mostly used for horizontal well packing, and the switch mechanism adopts an axially sliding sliding sleeve mechanism. Most of these mechanisms need to be reset by springs, and there are many problems in practical applications: one is the problem that the sliding sleeve cannot be closed normally due to spring fatigue failure; the other is the problem that the sliding sleeve cannot be closed normally due to insufficient sp...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a rotary sliding sleeve type bottom filling device for gravel filling, which can realize infinite repeated switching of the switching mechanism without springs, and is a strong opening and strong closing switching mechanism, which solves the problem of existing Problems existing in technology that cannot be closed normally due to spring fatigue failure or insufficient reset force

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