Piston suction device of oil well sand removal device
The technology of a suction device and a piston is applied in the field of oil well machinery, which can solve problems such as inconvenience of use and achieve the effect of convenient operation.
Active Publication Date: 2014-10-08
南通格雷斯智能环保设备有限公司
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Problems solved by technology
However, when pumping sand with a low liquid level, a shorter pipe is used, which is light in weight. Due to the blockage of sediment, the static friction force between the piston and the pipe wall is greater than the gravity of the device itself. , inconvenient to use
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[0012] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0013] attached figure 1 Middle: Outer tube 1, pull rod 2, pump cylinder 3, first cavity 4, second cavity 5, pump cylinder wall hole 6, piston cavity 7, rubber cylinder pressure cap 8, piston body 9, rubber cylinder 10, Spacer ring 11, tie rod joint 12, joint through hole 13, righting joint 14, valve ball 15, valve seat 16.
[0014] The piston suction device of the oil well sand cleaner includes an outer pipe 1, a pull rod 2 with a piston mechanism at one end, the pull rod 2 is provided with a centralizing joint 14, a pump barrel 3, and the outer pipe 1, the pump barrel 3 and the pipe joint Fixed to form a concentric tube mechanism, the piston mechanism includes a piston body 9, a piston cavity 7 is spaced between the central hole of the piston body 9 and the cylindrical surface of the pull rod 2.
[0015] The concentric tube mechanism includ...
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The invention discloses a piston suction device of an oil well sand removal device. The piston suction device comprises an outer tube (1), a pull rod (2), a pump cylinder (3), a concentric tube mechanism, a rubber sleeve pressing cap (8), a rubber sleeve (10) and a pull rod connector (12). The pull rod (2) is provided with a centralizing connector (14). A piston cavity (7) is spaced between a center hole of a piston body (9) and the cylindrical surface of the pull rod (2). The concentric tube mechanism comprises a first cavity (4) and a second cavity (5), the first cavity (4) is communicated with the second cavity (5) through a pump cylinder wall hole (6), and the second cavity (5) is communicated with the piston cavity (7). The rubber sleeve (10) is provided with a distance ring (11), the pull rod connector (12) is provided with a connector through hole (13), and a valve pair mechanism is arranged on the surface of a rod body of the pull rod (2) placed between the centralizing connector (14) and the piston device. The valve pair mechanism comprises a valve ball (15) which slides along the rod body of the pull rod (2) and a valve seat (16) which is fixedly connected with the piston body (9). The piston suction device of the oil well sand removal device has the advantages of being applicable to low liquid level operation, convenient to operate, reliable and durable.
Description
technical field [0001] The invention relates to oil well machinery, in particular to a piston suction device for an oil well sand cleaner. Background technique [0002] There are many wellheads with sand settling in oil fields, shale gas and coalbed methane projects, and a considerable part of them are in a state of low liquid level. If the sand is dredged at a low liquid level, water must be injected into the oil well to ensure the normal operation of the piston friction pair of the sand cleaner, which will bring trouble to the dredging operation and pollute the oil layer. Water injection and well washing operations should be avoided as far as possible during the coalbed methane exploitation process. [0003] In the prior art, the process of piston pressing down is sand discharge, and the process of piston pulling up is sand pumping. For the deep liquid surface, the longer pipeline is adopted, and the weight is heavy. Since the static friction force between the piston and...
Claims
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IPC IPC(8): E21B21/00F04B47/00
Inventor 常琦
Owner 南通格雷斯智能环保设备有限公司