Anti-clamping oil well pump

Abstract

The invention discloses an anti-clamping oil well pump. The anti-clamping oil well pump comprises an oil pipe, a correcting joint hoop, correcting bodies, a pump barrel, an outer desilting pipe, a casing pipe, an oil rod, a piston, a pump seat and the like. The oil pipe is arranged in the casing pipe. The lower end of the oil pipe is connected with the outer desilting pipe trough the correcting joint hoop. The correcting bodies are arranged in the correcting joint hoop. The lower end of the correcting joint hoop is connected with the upper portion of the pump barrel through the connecting bodies and a fixing ring. The lower end of the pump barrel and the lower end of the outer desilting pipe are connected with a double-wire joint. An inner thread of the lower end of the double-wire joint is connected with the pump seat. The piston and the oil rod are arranged in the pump barrel. The lower end of the outer desilting pipe is connected with an outer thread of the double-wire joint. The pump barrel is connected with an inner thread of the double-wire joint. A piston cap is arranged on the oil rod. The anti-clamping oil well pump has the beneficial effects that scrap iron and sediment are guided into an annular space between the pump barrel and the outer desilting pipe through the piston cap, the normal work of the oil well pump can be guaranteed, the scrap iron and sediment can be collected effectively, the stuck pump fault is avoided, and the service life of the oil well pump is prolonged.

Description

technical field [0001] The invention belongs to the field of oil well production equipment, and in particular relates to an anti-seize oil well pump. Background technique [0002] During the production process of oil wells, pump jam failures often occur. Pump jam failure means that the piston is stuck in the pump barrel and cannot move back and forth, or the piston cannot enter the pump barrel. The main reasons can be divided into two situations: one is Iron filings are stuck in the pump. During workover operations, workers use pipe tongs or hydraulic tongs to twist the oil rod or oil pipe. Because high torque is required to rotate the screw thread, it is very easy to drop iron filings. Once the iron filings fall into the In the oil pipe, only the pump barrel can enter, and the joint of the pump barrel is funnel-shaped, so that the iron filings will naturally fall into the annular groove where the pump barrel is stuck on the piston; the second is that the sediment is stuck i...

AI Technical Summary

Problems solved by technology

[0003] When lifting and unblocking a stuck pump failure, the oil rod back-off operation is required if it cannot be released within the specified lifting tonnage. The oil rod back-off operation is one of the very dangerous downhole operations, and there are great potential safety hazards

In addition, the undercut operation cannot use the percussion oil drainer to drain the oil, which will cause serious environmental pollution and waste of resources

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