Injector for water injection wellhead and three-tube water injection wellhead device using the same

Abstract

The invention discloses a separate injector for a water injection well mouth. The separate injector comprises a valve body and a bonnet, and is characterized by further comprising a water mouth base and a damping cross flowing water mouth, wherein the bonnet covers the valve body; a medium flowing cavity is formed between the bonnet and the valve body; a liquid inlet hole and a liquid outlet hole are formed in the top of the valve body; side liquid holes are respectively formed in the two sides of the lower part of the valve body; the liquid inlet hole is in penetrating connection with the side liquid hole at the same side; the liquid outlet hole is in penetrating connection with the side liquid hole at the same side; a liquid injection hole penetrating through the valve body is formed in the valve body; one end of the water mouth base extends into the liquid injection hole for connecting; the damping cross flowing water mouth is arranged at the other end of the water mouth base, and is provided with multiple opening holes for flowing a medium; and the medium passing through the opening holes can flow into the liquid injection hole. The separate injector for the water injection well mouth is simple in structure and convenient to use, can keep the pressure of the medium after the shunting, and quickly dredges the clogging part; and the invention further provides a three-pipe water injection well mouth device using the separate injector.

Description

technical field [0001] The invention belongs to the technical field of petroleum machinery, and in particular relates to an injector for oilfield water injection wellheads and a three-pipe water injection wellhead device using the injector. Background technique [0002] In the process of oil extraction, it is often encountered that sand and gravel blockage makes it difficult to pump out crude oil. At this time, it is necessary to try to remove the blockage. Usually, the sand and gravel are washed away by injecting water into the oil well through a single pipe, but Since the oil may be buried in different rock formations, with single-pipe water injection, different rock formations have different pressures into the flowing water, which makes it impossible to dredge the sand and stones in multiple rock formations, which brings difficulties to the extraction of crude oil. Contents of the invention [0003] In order to solve the problems in the prior art, the present invention ...

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Problems solved by technology

[0002] In the process of oil extraction, it is often encountered that sand and gravel blockage makes it difficult to pump out crude oil. At this time, it is necessary to try to remove the blockage. Usually, the sand and gravel are washed away by injecting water into the oil well through a single pipe, but Since the oil may be buried in different rock formations, using single pipe water injection, the pressure of the flowing water entering different rock formations is different, which makes it impossible to dredge the sand and stones in multiple rock formations, which brings difficulties to the extraction of crude oil

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