Thermal production snubbing device
A technology of well killing and thermal recovery, which is applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., and can solve problems such as pollution, hidden dangers of safety accidents, and cold damage
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[0021] Such as Figure 1~3 As shown, the present invention includes: a Christmas tree 20, a thermal fluid pipe string 24, a top switch valve device 9 and an anti-pollution back pressure valve tool 10. The lower part of the valve tool 10 is equipped with a perforated pipe string 23, and the top switch valve device 9 is arranged on the wellbore casing 21; the thermal fluid pipe string 24 is arranged at the lower part of the top switch valve device 9, and can be inserted into the anti-pollution back pressure valve tool Inside, the Christmas tree 20 is arranged on the top of the top switch valve device 9 .
[0022] The anti-pollution back pressure valve tool 10 is used to automatically close after the hot fluid pipe string 24 is extracted, and close the high-pressure fluid (crude oil, water, etc.) below the position of the anti-pollution back pressure valve tool 10, so that the anti-pollution back pressure valve There is no high pressure in the space above the tool 10 position, a...
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