Split type intelligent plunger with pulley mechanism
A split-type, pulley technology, applied in the fields of mining fluids, mechanical equipment, machines/engines, etc., can solve the problem of uncontrollable movement speed of the plunger, and achieve the goal of shortening the ascending time, enhancing the stability and drainage efficiency, and improving the drainage efficiency. Effect
Inactive Publication Date: 2019-05-07
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
[0007] The purpose of the present invention is to solve the problem of uncontrollable plunger movement speed in actual gas well drainage, and proposes a split type intelligent plunger with pulleys, which realizes real-time control of the speed of the plunger in the process of going up and down, making it safe Smoothly reach the bottom or wellhead, avoid damage to the bottom or wellhead equipment due to excessive impact force, and reduce the risk of downhole accidents
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0038] Embodiment 1: as image 3 As shown, at the top end, the plunger body (4) and the plunger sleeve (7) are thrown into the gas well as a whole.
Embodiment 2
[0039] Embodiment 2: on the basis of embodiment 1, as Figure 4 As shown, the plunger body (4) is separated from the plunger sleeve (7) under the action of the push rod of the top limiter, and then falls first.
Embodiment 3
[0040] Embodiment 3: on the basis of embodiment 2, as Figure 5 As shown, the plunger body (4) performs a free-fall motion in the wellbore until it reaches the optimal speed range calculated by the previous dynamic model.
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The invention relates to the field of gas well drainage and gas production, in particular to a split type intelligent plunger with a pulley mechanism. The split type intelligent plunger with pulley mechanism is characterized in that the intelligent plunger comprises a plunger body, a pulley mechanism at the lower end of the plunger body, a plunger sleeve, a spring slip arranged in the plunger sleeve, an open butterfly valve with a locking device, an upper buffer, a lower buffer, a self-adaptive valve mechanism arranged in the lower buffer and a pressure sensor, a temperature sensor, a speed sensor and a microprocessor control attached to the plunger body and the plunger sleeve; the speed of the plunger body and the plunger sleeve in the ascending or descending process is controlled by controlling the action of the pulley mechanism. Compared with the prior art, the split type intelligent plunger with pulley mechanism has the advantages that the defect that the speed of the plunger usedfor draining water in the prior continuous production operation without closing the well is not controllable is solved, and the problem that an underground or wellhead accident is caused due to serious collision between the plunger body and the plunger sleeve in the a ascending or descending process is effectively avoided.
Description
technical field [0001] The invention relates to the field of gas field drainage and gas production, in particular to a split-type intelligent plunger with a pulley mechanism. Background technique [0002] According to the data of the National Energy Administration, the proportion of my country's primary energy consumption: natural gas accounted for 2.7% in 2003, increased to 5.3% in 2010, and is expected to increase to 9.8% by 2020. It can be seen from this that under the general tone of constantly emphasizing environmental protection, reducing pollution, and green mountains and green waters are golden mountains and silver mountains, my country's energy structure is constantly tilting towards cleaner energy, so my country's natural gas demand is still showing an upward trend . However, nearly 30% of my country's current natural gas consumption depends on imports from overseas. Therefore, it is very necessary to increase my country's total natural gas production to meet the n...
Claims
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IPC IPC(8): E21B43/00E21B34/06F04B47/12
Inventor 朱海燕张庆恺董润刘清友刘文全赵建国
Owner SOUTHWEST PETROLEUM UNIV
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