Split diameter-changing oil testing swab

Abstract

The present invention relates to a split diameter-changing oil testing swab in oil well working tool field, which is disposed from up to down with a fishing device, an oil intake lower joint, a central pipe, an upper joint, a loading lever, a conical surface body, a steel cable terminal joint and a support cylinder. A conical surface body with conical surface is disposed between the loading lever and the steel cable terminal joint, the steel cable is jointed with the support cylinder, the outside of the support cylinder is disposed with an upper glue cylinder, the cylinder wall of the support cylinder on the inner side of the upper glue cylinder is disposed with through holes, the outer diameter of the upper cylinder is larger than the outer diameter of the glue cylinder, the upper and lower sides of the upper glue cylinder are disposed with an upper cylinder bearing seat, the support cylinder on the upper side of the upper glue cylinder is disposed with an upper oil outlet, the inner side of the lower end surface of the support cylinder is disposed with a conical surface, the conical surface of the support cylinder is coupled with the conical surface of the conical surface body. The invention not only is adapted for testing oil in equal diameter bushing or oil pipe, but also is adapted for testing oil for diameter-changing bushing or oil pipe.

Description

technical field [0001] The invention relates to a downhole operation tool for oilfields, in particular to a split-type variable-diameter oil-testing pump used for oil-testing of oil wells and oil-fishing of low-production wells. Background technique [0002] The oil test pump is mainly used for oil well test to prove the oil reserves and depth. The oil test pump in the prior art is mainly composed of a fishing device, an oil inlet joint, a ball valve, a pressure seat, a rubber tube, Composed of center pipe, upper joint, weighting rod and wire rope joint, the salvage device is set at the lower end of the oil test pump, the upper end of the salvage device is connected with the lower oil inlet joint, the upper end of the lower oil inlet joint is connected with the center pipe, and the upper end of the center pipe It is connected with the upper joint, the upper end of the upper joint is connected with the weighting rod, the upper end of the weighting rod is connected with the wi...

AI Technical Summary

Problems solved by technology

However, this type of sidetracking well has the characteristics of high sidetracking window opening point, small liner size, low permeability of the target layer, low pressure, and low production.

In the process of oil testing, it is often encountered that due to the low liquid production rate and the difficulty of liquid flowback in the small casing, it is impossible to use conventional swabbing and strong drainage techniques to dredge the formation and obtain production at constant pressure (deep depth). sex questioned

What's more, due to the low production of sidetracked wells, they cannot be put into normal production, so the sidetracked wells are idle and cannot be used; how to solve the liquid drainage problem of such sidetracked small cased wells has become one of the urgent problems for oil production engineers. 1. At present, there is no oil testing tool at home and abroad that can test oil in the reducer

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