Spring sheet type collar locator

Abstract

The invention relates to the technical field of collar locators, and provides a spring sheet type collar locator. The spring sheet type collar locator comprises a collar body, a straight spring sheet, a positioning piece, and a measuring projection, at least two vertical spring sheet installation grooves are distributed at intervals along the circumference at the outside of the collar body, the straight spring sheet parallel to the collar body is fixedly arranged in the spring sheet installation grooves, the collar body at the inner side of the middle part of the straight spring sheet is respectively provided with spring sheet retraction grooves, the outer end of the middle part of the straight spring sheet is fixedly provided with the positioning piece, and the positioning piece is fixedly provided with the measuring projection. According to the spring sheet type collar locator, the structure is reasonable and compact, and the usage is convenient; when the measuring projection passes through the bottom port of a sleeve, the straight spring sheet is inwardly compressed, compared with a flexible spring sheet, the straight spring sheet is advantaged by higher elastic resistance, more obvious change of lifting force data, higher sensitivity, and easy control; besides, the bending rigidity of the straight spring sheet is good, plastic deformation is prevented, and the service lifetime of the collar locator is extended.

Description

technical field [0001] The invention relates to the technical field of collar locators, and relates to a shrapnel type collar locator. Background technique [0002] In the production process of water injection wells, in order to accurately judge the position of the downhole casing collar, it is necessary to use a collar locator, including a locator body, a spring piece and a locator piece; A positioning piece is installed on the circumference of the piece, and a rib with an outer diameter larger than the casing is provided on the outer surface of the positioning piece; when in use, first place the collar locator at the bottom of the well, and lift the locator, when the surface of the positioning piece is When the rib meets the bottom end of the casing, the lifting force data changes, that is, it is determined that this position is the installation position of the casing collar; since the spring leaf used is a curved leaf spring, when the rib meets the bottom end of the casin...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a shrapnel-type collar positioner, which overcomes the shortcomings of the above-mentioned prior art, and can effectively solve the problem of collar positioning using bent leaf springs. The device has poor sensitivity and is difficult to control accurately; and the curvature of the spring leaf is reduced so that it cannot form an effective elastic effect, which affects the normal use of the coupling positioner and the problem of low service life

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