Anti-sand and anti-scaling long plunger pump

Abstract

Provided is a sand-preventing scale-preventing oil well pump with a long plunger piston. A short pump barrel is connected with a pump barrel lengthening barrel, the upper end of the short pump barrel is provided with a righting ring and a scale scraping ring, the long plunger piston is installed in the short pump barrel and the pump barrel lengthening barrel, a sand-settling pipe is further installed outside the short pump barrel and the pump barrel lengthening barrel, and the lower end of the pump barrel lengthening barrel is provided with at least one one-way valve. The upper end of the sand-settling pipe is connected with an oil pipe coupling through a righting coupling and a extension coupling, and the lower end of the sand-settling pipe is connected with a double-passage joint. Two ends of the long plunger piston are provided with a first traveling valve and a second traveling valve. The sand-preventing scale-preventing oil well pump with the long plunger piston can effectively prevent litter, sand grains and scale form clamping and burying the plunger piston and a plug fixing valve, achieve normal work in a sand-containing and scaled crude oil well, improve pump efficiency and prolong the pump inspection period.

Description

technical field [0001] The invention relates to an oil well pump, in particular to a long plunger oil well pump with anti-sand and anti-scaling, which is used for pumping sandy and scaled crude oil in an oil field. Background technique [0002] At present, oilfields mainly use ordinary tubular oil well pumps for mechanical oil recovery, and in oil well production, there will always be some debris in the tubing: there are debris falling from the wellhead during operation, there are sucker rods and tubing walls Scale and rust that have come off on the surface, mud and sand carried out in the oil, etc.; in oil wells with scaling, the plunger or pump barrel may be stuck after fouling. These conditions will bring harm to oil well production and cause failure of oil pump, mainly as follows: [0003] (1) When the oil well is fouled, the plunger or the pump barrel is fouled, causing the plunger to be stuck and causing the oil well pump to fail. [0004] (2) When pumping oil, sundr...

AI Technical Summary

Problems solved by technology

[0003] (1) When the oil well is scaled, the plunger or the pump barrel is scaled, causing the plunger to be stuck and causing the oil well pump to fail

[0004] (2) When pumping oil, sundries enter the pump barrel and block the plunger, causing the pump to fail

[0005] (3) When pumping oil, sundries are cushioned on the sealing surface of the ball valve, so that the valve ball cannot be set and sealed, resulting in leakage failure of the oil well pump

[0006] (4) When pumping is stopped, sundries are deposited on the oil well pump, which will bury the plunger and block the fixed valve, so that the plunger and fixed valve cannot move during re-pumping, causing the oil well pump to fail

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