A downhole blowout prevention switch with test channel for pumping unit monitoring well
A technology for testing channels and monitoring wells, applied in wellbore/well components, wellbore/well valve devices, buildings, etc., can solve pollution and other problems, and achieve the effect of no spring mechanism, long service life, simple and reasonable structure
Active Publication Date: 2020-11-24
PETROCHINA CO LTD +1
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Problems solved by technology
[0003] The purpose of the present invention is to provide a downhole switch with a test channel suitable for pumping unit monitoring wells, which solves the problem of pollution caused by overflow in the pumping unit monitoring well passing through the annulus test and the process of lifting and lowering the pipe string. Downhole blowout prevention switch with test channel for monitoring well
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specific Embodiment approach
[0010] Specific embodiments: the present invention will be further described below in conjunction with the accompanying drawings: the present invention consists of an upper joint 1, a guide head 2, a guide rail 3, a connecting cylinder 4, a spring claw 5, a positioning pin 6, an upper central tube 7, a positioning cylinder 8, a valve External cylinder 9, guide pin 10, lower central tube 11, connecting rod 12, short shaft 13, valve core 14, guide seat 15, connecting pin 16, wherein the upper joint 1 is threadedly connected with the connecting cylinder 4, the guide rail 3 is connected with the guide head 2 Welded connection, the spring claw 5 is threaded with the guide head 2, the upper central tube 7 and the spring claw 5 are fixedly connected through the positioning pin 6, the positioning cylinder 8 is threaded with the connecting cylinder 4, the valve outer cylinder 9 is threaded with the positioning cylinder 8, and the lower The central pipe 11 is fixedly connected with the u...
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The invention relates to the technical field of oil production engineering in the oil field, and belongs to an underground blowout prevention switch with a test channel for a pumping unit monitoring well. The underground blowout prevention switch is designed in order to solve the problems of pollution caused by overflow in the process of tripping in and lifting up a tubular column of the pumping unit well and through annulus tests. The underground blowout prevention switch comprises an upper joint (1), a guide head (2), a guide rail (3), a connecting cylinder (4), a spring claw (5), a positioning pin (6), an upper central pipe (7), a positioning cylinder (8), a valve body outer cylinder (9), a guide pin (10), a lower central pipe (11), a connecting rod (12), a short shaft (13), a valve element (14), a guide base (15) and a connecting pin (16). The underground blowout prevention switch has the advantages of reasonable structure, simple operation, ability of realizing the through annulstests of the pumping unit well, ability of effectively avoiding safety risks and environmental pollution caused by overflow in the process of tripping in and lifting up the tubular column, and the like.
Description
technical field [0001] The invention relates to the technical field of oil production engineering in an oil field, and belongs to an underground blowout prevention switch with a test channel for a pumping unit monitoring well. Background technique [0002] At present, there are many tools used in downhole blowout prevention, such as flap valves, float valves, etc., but there are some problems in the field application process, such as the spring of flap valves is prone to fatigue failure, and the cleanliness of the sealing surface of float valves is required Higher, poor adaptability to complex downhole environments, resulting in downhole fluid overflow during construction and polluting the environment. In addition, the pumping well needs to be lowered into the test tool for detection, and the existing tools cannot meet this requirement. Therefore, it is necessary to provide a new type of blowout prevention tool that can provide a test channel and achieve effective blowout pr...
Claims
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IPC IPC(8): E21B34/14
CPCE21B34/14E21B2200/05
Inventor 姚飞孙江祝绍功徐晓宇宋兴良刘钰川赵骊川许浩张平安高飞
Owner PETROCHINA CO LTD