Injection and production dual-purpose pipe string structure

A pipe string and dual-purpose technology, which is applied in the field of injection-production dual-purpose pipe string structure, can solve the problems of heavy weight, inconvenient transportation, plug length, etc., and achieve the effects of reducing weight, improving flexibility of use, and shortening length
CN110905467AActive Publication Date: 2020-03-24PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
PETROCHINA CO LTD
Publication Date
2020-03-24

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Abstract

The invention provides an injection and production dual-purpose pipe string structure which includes a tubing pump, an air injection valve and a first sucker rod. The tubing pump includes a shell anda plunger piston, and the plunger piston is movably arranged in the shell to suck fluid; the air injection valve includes a first cylinder body and a sealing structure, the first cylinder body is detachably arranged on the shell, the first cylinder body is provided with a first air injection hole, the sealing structure is movably arranged in the first cylinder body, and the sealing structure has aclosed position where the first air injection hole is blocked and an open position where the first air injection hole is avoided; and the first sucker rod penetrates into the first cylinder body andis connected to the plunger piston, the first sucker rod can drive the plunger piston to move in the shell, and meanwhile, the first sucker rod can drive the sealing structure to move between the closed position and the open position. The injection and production dual-purpose pipe string structure in the technical scheme can effectively solve the problem that a plunger piston of a long injection and production dual-purpose pipe string in the prior art is long, the weight is large, and consequently transportation is not conveniently achieved.
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Description

technical field

[0001] The invention relates to the field of oil field exploitation, in particular to an injection-production dual-purpose pipe string structure. Background technique

[0002] Xinjiang and Liaohe are rich in heavy oil resources. Steam injection and oil pumping operations are required in heavy oil steam huffing and SAGD production. Injection production pumps have been widely used in the field due to their advantages of steam injection and pumping without snubbing. Through investigation, it is found that the injection-production pumps used in the oil field mainly include long plunger injection-production dual-purpose pumps, feedback pumps and thermal recovery rod pumps. At present, these injection-production pumps have the following problems: (1) Long plunger injection-production dual-purpose pumps have long plunger length, heavy weight, difficult processing, high cost, inconvenient transportation, and pump barrel knots during steam injection when used for long...

Claims

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