Tube pump fixed ball overshot and its use method

Abstract

The invention provides a fishing socket for a fixed valve ball of a tubing pump and a using method of the fishing socket. The fishing socket is suitable for fishing the fixed valve ball when a fixed valve cover of the underground tubing pump of a producing well in the petroleum industry breaks and the valve ball falls into the well and enters oil jacket annulus to become a double-fish-top falling object, so that a form of the underground failing object is enabled to be simplified, and fishing of a falling string is facilitated. The fishing socket comprises an upper joint and a fishing socket body connected with the upper joint, and a valve ball capturing mechanism is fixed in the fishing socket body through a guide rail pin and can slide in the fishing socket body; a guiding shoe is arranged at the lower part of the fishing socket body, a valve is mounted on the inner walls of the two sides of a valve ball guiding track of the guiding shoe, and a ball window of the valve ball capturing mechanism is opposite to the valve. The fishing socket enters the well with the downhole string and performs fishing after circulating well washing. With the adoption of the fishing socket and the using method thereof, the success rate of working can be increased, the well occupation time of the working is shortened, and the production cost is remarkably reduced.

Description

technical field [0001] The invention relates to a fishing tool for falling objects in a well in the petroleum industry, in particular to a tubular pump fixed ball ball overshot and a method for using the same. When the downhole double fish tops the falling object, the fixed ball ball is used for salvage, which simplifies the shape of the downhole falling object and facilitates the salvage of the falling well pipe string. Background technique [0002] It is the most common production form for oil production wells to use tubular oil well pumps to go down well. If the fixed valve cover of the tubular oil pump breaks, the fixed valve ball and the production liner will fall into the well. picture Figure 4 In this case, the ball and the fractured valve seat are juxtaposed and squeezed in the annular space between the tubing and the casing, and the fish top becomes the double fish top form of the valve ball and the broken valve seat. It is impossible to carry out foreign fishing ...

AI Technical Summary

Problems solved by technology

However, in actual construction, the success rate of turning the ball into the seat with the hook is extremely low. At this time, it is necessary to grind the ball and seat together to salvage the remaining downhole debris.

However, minor repairs are very difficult to grind and mill balls and valve seats, so it often leads to the conversion from minor repairs to major repairs, which not only delays production, but also greatly increases operating costs. The production site urgently needs to solve the above problems

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