A gritty air anchor
A gas anchor and sand settling technology, which is applied in wellbore/well components, production fluids, earthwork drilling, etc., can solve the problem that the separation effect needs to be improved, and achieve the effect of reducing the pump efficiency.
Active Publication Date: 2020-05-08
PETROCHINA CO LTD
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Problems solved by technology
[0005] The separation effect of gas, liquid and sand particles of the gas sand anchor provided by the prior art still needs to be improved
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[0043] Unless otherwise defined, all technical terms used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art. In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0044] The embodiment of the present invention provides a kind of sand settling air anchor, as attached figure 1 As shown, the sand settling air anchor includes an upper joint 1 , an outer pipe 2 , a collar 3 , a screen pipe 4 and a lower joint 5 which are sequentially connected and conducted from top to bottom. Further, the sand settling gas anchor also includes: a gas-liquid separator 6 arranged in the outer pipe 2 , and a liquid-sand separator 7 arranged in the screen pipe 4 .
[0045] Wherein, the gas-liquid separator 6 includes a central tube 601 with a lower end...
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The invention discloses a sand setting gas anchor and belongs to the field of oil well downhole tools. The sand setting gas anchor comprises an upper connector, an outer pipe, a coupling, a screen pipe, a lower connector, a gas-liquid separator and a liquid-sand separator which sequentially communicate from top to bottom, wherein the gas-liquid separator is arranged in the outer pipe, and the liquid-sand separator is arranged in the screen pipe. The gas-liquid separator comprises a center pipe with the lower end being blocked and a gas-liquid spiral blade spirally arranged around the outer wall of the center pipe, and the outer periphery of the gas-liquid spiral blade makes contact with the inner wall of the outer pipe. The upper end of the center pipe communicates with the outside world through a right-angle pipe connector, and an air inlet hole is formed in the wall. The liquid-sand separator comprises a center column and further comprises an upper spiral blade and a lower spiral blade which are spirally arranged around the outer wall of the center column, a gap is formed between the outer periphery of the upper spiral blade and the inner wall of the screen pipe, and the outer periphery of the lower spiral blade makes contact with the inner wall of the screen pipe. An upper spiral channel with the bottom end being blocked and the top end being open is spirally formed in the upper surface of the upper spiral blade, and the lower spiral channel with the bottom end being open and the top end being blocked is spirally formed in the upper surface of the lower spiral blade. Thesand setting gas anchor is better in gas-liquid-sand separating effect.
Description
technical field [0001] The invention relates to the field of downhole tools for oil wells, in particular to a sand-setting gas anchor. Background technique [0002] Oilfield crude oil lifting equipment is mainly based on plunger-type oil well pumps. When the oil well pumps work downhole, they pump a three-phase crude oil mixture of gas, oil, and water. For the development of unconsolidated sandstone reservoirs in oilfields, In the process of using the oil well pump for suction, there will be considerable impurities such as sand grains in the crude oil mixture being sucked. For the oil well pump, the gas entering it will reduce the pump efficiency and affect the output; the sand entering it will not only accelerate the wear of the oil well pump, but also cause the oil well pump to be stuck and unable to work in severe cases. In order to solve the above-mentioned problems of sand entry and air intake in the oil well pump, sand settling air anchors (also known as air sand anch...
Claims
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IPC IPC(8): E21B43/38
CPCE21B43/38
Inventor 刘树高韩岐清唐庆郑小熊李少甫王新红李海燕马晓雁李瑞清
Owner PETROCHINA CO LTD