Friction setting sand prevention pipe column, friction setting packer and method

Abstract

The invention discloses a friction setting sand prevention pipe column, a friction setting packer and a friction setting method. The friction setting sand prevention pipe column comprises the packer, a blind pipe, a safety connector, a sand prevention device, a centralizer and a screwed plug which are sequentially connected from top to bottom. The packer is a friction setting packer; the friction setting packer comprises a setting releasing system and a hanging packing system, and the lower end of the setting releasing system and the upper end of the hanging packing system are connected and fixed through a hanging pin. The setting releasing system comprises a releasing inner pipe, a friction assembly and a limiting ring, and the friction assembly is installed on the outer wall of the releasing inner pipe. Through the action of the friction assembly, the functions of setting, hanging, packing and the like can be completed without pressing of a pump truck, the setting cost of the pump truck can be saved, the time for waiting for the pump truck and a tank truck in construction can also be saved, meanwhile, the damage of working fluid to a reservoir is reduced, and the energy loss of thermal oil recovery is reduced. Conical holes are uniformly distributed in the sand prevention device, so that the validity period is prolonged while sand prevention is met.

Description

technical field [0001] The invention relates to the technical field of oil exploitation sand control, in particular to a friction-set sand control pipe string, a friction-set packer and a method thereof. Background technique [0002] In unconsolidated sandstone reservoirs, sand control technology, as the basic project to ensure the normal production of oil wells, mainly includes chemical sand control, mechanical sand control and composite sand control formed by the combination of chemical and mechanical. Sand control has developed from defensive types such as sand filter tube sand control to extrusion filling and fracturing sand control, which have a certain transformation effect on the formation. However, with the deepening of oilfield exploration and development, deep burial or some new development blocks, the degree of reservoir cementation is high and the sand production is slight; at the same time, oil wells with complex oil-water relationship in old areas, sensitive re...

AI Technical Summary

Problems solved by technology

The construction requires supporting equipment and corresponding construction conditions, the process is cumbersome and the cost is high

There is also a packer that is set by mechanical methods such as lifting or rotating the string, mainly through special tracks (long and short tracks or J-shaped grooves, etc.), and improper operation is easy to set in the middle

Conventional multi-layer sand filter tubes or slotted screens are used in thermal oil recovery. Due to the uneven stress and thermal effect on each part of the sand retaining layer or slit, the sand control pores or slots are deformed, which makes it difficult to maintain the sand retaining accuracy and affect Sand control effect and validity period

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