Adjustable steam flow control device
A steam flow and control device technology, which is applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc., can solve the problems of limiting the thermal efficiency of steam injection in oilfields, the flow control of the regulating valve, and the inability to inject, etc., to improve the thermal efficiency mining effect, reducing invalid steam injection, and increasing production capacity
Active Publication Date: 2018-08-14
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
At present, the single well steam injection in the field is regulated by the steam flow control valve or stop valve in the steam injection pipeline network. During the steam injection process in the oil field, most of the steam dryness is in the range of 30-90%, which belongs to the steam-water two-phase flow. There is a phenomenon of steam-water two-phase slippage, and ordinary control valves cannot achieve precise flow control, resulting in the inability of various steam injection branches or steam injection wells to inject according to the designed flow rate, which greatly limits the improvement of thermal efficiency of steam injection in oil fields
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[0015] The detailed description and technical content of the present invention are described below with the accompanying drawings, but the accompanying drawings are only provided for reference and description, and are not intended to limit the present invention.
[0016] Refer to attached figure 1 , an adjustable steam flow control device on the oil field surface. The front bracket 2 and the rear bracket 11 are fixed inside the pipe wall 1 together to play the role of righting the entire internal mechanism. The structure is a triangular bracket structure, and the front end of the horizontal transmission gear shaft 3 and the front The bracket 2 is connected, the rear end is connected with the movable float 8, and forms a transmission mechanism with the vertical transmission gear shaft 7 above, thereby controlling the movable float 8 to drive the limit spring 10 forward and backward in the critical flow nozzle 9 to reach The purpose of changing the flow area of the steam in th...
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The invention discloses an adjustable type steam flow control device. The adjustable type steam flow control device comprises a flow regulator and a transmission device. The flow regulator comprises a movable floater and a critical flow nozzle. The critical flow nozzle is sleeved with the inner wall of a steam pipe. The movable floater is arranged in the center of the critical flow nozzle. The outline of the movable floater is conical. The inner wall of the critical flow nozzle is in the trumpet shape, and an annular space type runner is formed between the movable floater and the critical flow nozzle. The front end of the movable floater is connected with the transmission device. The transmission device drives the movable floater to move axially, then the flow passing area of the annular space type runner is changed in a stepless mode, and steam flow control is achieved. The axes of the flow regulator, the transmission device and the steam pipe coincide. The conical outer diameter of the movable floater becomes smaller gradually from left to right. The trumpet inner diameter of the critical flow nozzle becomes larger gradually from left to right. According to the adjustable type steam flow control device, the regulation, control and distribution levels of wet steam in the heavy oil thermal recovery and development processes are greatly improved.
Description
technical field [0001] The invention relates to a flow control device, in particular to an adjustable steam flow control device used for the outlet of a steam injection boiler in an oil field or a ground transmission pipeline in the thermal recovery of heavy oil. Background technique [0002] Our country is rich in heavy oil reserves, steam injection is an important method of thermal oil recovery, in which the flow rate and dryness of injected steam play a very important role in increasing production and improving economic benefits of oil wells. At present, the single well steam injection in the field is regulated by the steam flow control valve or stop valve in the steam injection pipeline network. During the steam injection process in the oil field, most of the steam dryness is in the range of 30-90%, which belongs to the steam-water two-phase flow. There is a phenomenon of steam-water two-phase slippage, and ordinary control valves cannot achieve precise flow control, res...
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IPC IPC(8): E21B43/24
Inventor刘明赵晓李友平姜泽菊王超沈静逯国成戴宇婷栾智勇杨玉珍
OwnerCHINA PETROLEUM & CHEM CORP