Test Gate Antifreeze

Abstract

The invention relates to a test sluice gate anti-freezing device, which mainly solves the problem of freezing due to existence of a nonflowing dead water region of the existing test sluice gate. The test sluice gate anti-freezing device is characterized in that a flow guide pipe (1) is in a pipe shape; the lower end of the flow guide pipe (1) is provided with a sealing seat; a sealing seat outer groove is filled with a sealing ring; an annular lug boss (3) is arranged outside the upper part of the flow guide pipe (1); a flow guide groove is formed in the lug boss (3) in the axial direction; the sealing seat of the flow guide pipe (1) is arranged in the lower part of a wellhead small four-way valve (4) and is sealed; a test sluice gate short connector (2) is connected onto the outside of the lug boss (3) of the flow guide pipe (1) through internal screw threads; the lower end of the test sluice gate short connector (2) is connected onto a coupling short connector arranged on the wellhead small four-way valve (4) through screw threads; the upper end of the test sluice gate short connector (2) is connected with the lower end of a test sluice gate (5) through screw threads; and a flow guide annular space is formed between the flow guide pipe (1) and the test sluice gate short connector (2). The test sluice gate anti-freezing device has the characteristics that no dead water region exists; and freezing cannot occur.

Description

Technical field:

[0001] The invention relates to a test gate used for oil production in an oil field, in particular to an antifreeze device for the test gate. Background technique:

[0002] In the field of oil recovery, layered fine water injection is generally used in order to enhance the recovery factor. A test gate is installed on the Christmas tree of the layered water injection well. The test gate is an important tool to ensure the safety of the high pressure test of stratified water injection wells. However, the existing test gates have defects due to structural reasons: in oil fields located in alpine regions, the outdoor temperature is low in winter, and there are insufficient A dead zone of flow that causes the injected water in this zone to freeze. The frozen test gate will have two unfavorable factors for the work: one is that the frozen test gate needs to be baked with a blowtorch or electric heating and other means to thaw the test gate. Increased employee f...

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