Process for detecting inner and outer walls of oil-well pump

Abstract

The invention relates to a process for detecting inner and outer walls of an oil-well pump. The process comprises the following steps of: 1) recovering an old oil-well pump; 2) detaching and detecting; 3) describing and recording problems; 4) cleaning; and 5) detecting the inner and outer walls of the pump cylinder, wherein an inner wall detector for the pump cylinder of the oil-well pump is used for detecting in the step 5). The process avoids mixing up oil dirt and scaling and can be finished by one person only, and the working efficiency of repairing the oil-well pump is improved.

Description

technical field [0001] The invention relates to a detection process for the inner and outer walls of an oil well pump. Background technique [0002] The principle of the oil well pump is similar to the hand pump of the water well, the work cylinder and the piston. The working cylinder is connected to the lower part of the oil pipe, and the lower part of the working cylinder has a fixed valve, which is lowered below the liquid level of the wellbore. The piston is hollow and has a floating valve on it, which is lowered into the working barrel with the sucker rod. Pumping principle of oil pump: the sucker rod drives the piston to move up and down, when the piston moves upwards driven by the kowtow machine and the sucker rod, the floating valve is closed under the liquid pressure, at this time the crude oil on the piston is discharged from the working cylinder It is lifted into the oil pipe above, and then flows into the ground pipeline. At the same time, the pressure in the ...

AI Technical Summary

Problems solved by technology

The main disadvantages are: (1) The process is simple, and the test items cannot meet the requirements for use. For example, the oil well pump test and repair process includes: cleaning, visual inspection, fit clearance measurement, replacement of parts, assembly, leakage measurement, sealing performance test, and marking for use

However, the straightness of the pump barrel and plunger, and the sealing performance of the pump valve cannot be tested. The straightness and roundness of the pump barrel, plunger, and the judgment of the pump barrel in the maintenance work of the oil well pump can only be completed based on human work experience.

Lack of scientificity and accuracy, especially since the length of the pump barrel of the oil well pump is mostly more than six meters, the dead oil and scaling left on the inner wall of the pump barrel during cleaning are difficult to distinguish from scratches and peeling by naked eye end observation