General pilot production tool with pressure measuring function

Abstract

The invention provides a general pilot production tool with a pressure measuring function, and relates to the technical field of oil field pilot production equipment. The general pilot production tool comprises a pressure gauge, a reservoir switch short circuit and a core plug device, the reservoir switch short circuit comprises an outer sleeve and an inner sliding sleeve, a liquid passing gap communicating with the inside and the outside is arranged on the side wall of the outer sleeve, and the inner sliding sleeve is in axial sliding seal fit with the outer sleeve. A lower joint is fixedly connected to the lower end of the outer sleeve, a lock sleeve is fixedly connected to the outer sleeve below the inner sliding sleeve or the lower joint, a circular ring is arranged on the lower part of the lock sleeve and is in sealing fit with the outer sleeve, and the upper part of the lock sleeve is of a petal type structure. The petal type structure comprises a plurality of elastic strips, spaces for the elastic strips to bounce in the radial direction of the outer sleeve are reserved between the elastic strips and the outer sleeve, clamping openings are formed in the elastic strips, clamping teeth are correspondingly arranged on the outer side of the lower part of the inner sliding sleeve, the inner sliding sleeve moves downwards till the clamping teeth and the clamping openings are aligned, then the inner sliding sleeve and the clamping teeth are clamped, ascending of the inner sliding sleeve is limited, and at the moment, the upper end faces of the elastic strips limit the lower end face of the inner sliding sleeve at the same time.

Description

technical field [0001] The invention belongs to the field of oil field test production equipment, in particular to a general test production tool with pressure measurement function. Background technique [0002] Test production is actually production, that is, small-scale or short-term production in oilfields, generally the production of evaluation wells or detailed exploration wells (including pre-exploration wells). The main purpose of test production is to understand the production performance of oil wells and the decline of production pressure. A series of well tests shall be carried out in the test production process. [0003] At present, for the test production of multi-reservoir wells, the single-layer test production from bottom to top is mainly adopted. After the test production of the upper layer is completed, the pipe string must be pulled out before the test production of the upper layer, and the bridge plug must be lowered to seal the test production layer, an...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing general test mining tools need to frequently lift and lower pipe strings during the test mining test process one by one, the present invention provides a general test production tool with pressure measurement function. The reservoir switch in the present invention is short-circuited It can be opened or closed, so there is no need to lower the bridge plug to block during the upward return test mining process, so the trial mining test cycle is greatly shortened

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