Sealing device for packing of water injection pump of high pressure plunger of offshore oil platform
A technology of offshore oil and sealing devices, which is applied to parts of pumping devices for elastic fluids, pump elements, variable displacement pump parts, etc., and can solve problems such as increased piston wear, reduced density, and no compression. To achieve the effect of convenient disassembly of the structure, increase the service life and reduce the complexity
Pending Publication Date: 2020-09-25
中海石油中国有限公司秦皇岛326作业公司
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Problems solved by technology
[0005] First of all, due to the increase of medium pressure during operation, it is necessary to compress the compression amount more tightly, and the compression is too tight, resulting in increased friction between the piston and the packing, and the existing sealing structure has no auxiliary lubrication, only through reasonable Leakage for lubricating and cooling
When the unit runs for a long time, the plunger and other parts will become high temperature, and a small amount of leakage cannot meet the effect of cooling and lubrication. After a period of operation, the packing will be carbonized and solidified, and there will be no compression, so the sealing effect will not be achieved.
[0006] Secondly, after the packing has been in operation for a period of time, the high temperature will cause the packing to expand and the density will decrease. During the operation of the unit, the packing will bear the impact load during compression for a long time, resulting in packing fatigue and damage to the packing structure for a long time , causing the plunger to puncture
[0007] Moreover, in the prior art, a lead pad is used to buffer between two adjacent packings, and a spring box compensation system composed of a guide spring seat, a spring, and a spring base arranged in sequence is used to provide compensation force, which has a complicated structure and high cost , easily lost
[0008] At the same time, the packing of the rotary seal and reciprocating seal bears a lot of pressure, and the direction of movement is different. The packing is squeezed and deformed, which will cause the trajectory of the piston to change, thereby aggravating the wear of the piston, greatly increasing the wear of the piston, and prematurely scrapped
[0009] In addition, the water injection pressure of the high-pressure plunger water injection pump is high and the temperature is high. The leaked water will enter the crankcase through the tappet seal, causing the crankcase lubricating oil to emulsify and cause equipment failure
Method used
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Embodiment Construction
[0023] The present invention will be further elaborated below according to specific embodiments.
[0024] Such as figure 1 The sealing device shown for the packing of the high-pressure plunger water injection pump on the offshore oil platform includes a packing box 106 sleeved on the plunger 1, and the gap between the packing box 106 and the plunger 1 is placed on the plunger 1 The decompression bottom ring 101, the V-ring set 102, the pressure ring 103, the packing seal set 104 and the end cover 105 are sequentially set up from the direction of the medium. The V-shaped opening of the V-ring set 102 faces the medium side, and the decompression bottom The inner diameters of the ring 101 , the V-ring set 102 , the pressure ring 103 and the packing seal set 104 match the outer diameter of the plunger 1 . A sealant is provided on the contact surface between the end cover 105 and the packing box 106 , and the inner side of the end cover 105 is closely attached to the plunger 1 , ...
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The invention provides a sealing device for a packing of a water injection pump of a high pressure plunger of an offshore oil platform. The sealing device comprises a packing box arranged on the plunger in a sleeving manner, wherein a pressure reducing bottom ring, a V-shaped ring group, a pressure ring, a packing sealing group and an end cover are successively arranged on the plunger in a sleeving manner upward in a medium direction in a gap between the packing box and the plunger; a V-shaped opening of the V-shaped ring group faces a medium side; and the inner diameters of the pressure reducing bottom ring, the V-shaped ring group, the pressure ring and the packing sealing group are matched with the outer diameter of the plunger. As the opening of the V-shaped ring faces the medium side,the opening is increased, so that the pressure from a medium is buffered. A silica gel core packing is provided with a silica gel core structure to replace a spring box compensation system, a continuous sealing compensation force is provided, and the mounting complexity is reduced greatly.
Description
technical field [0001] The invention relates to the technical field of a high-pressure plunger water injection pump on an offshore oil platform, and more specifically, relates to a sealing device for the packing of a high-pressure plunger water injection pump on an offshore oil platform. Background technique [0002] High-pressure plunger water injection pump is the key equipment of offshore oil platform. In the production of oil and gas fields, water injection production is a common process. The specific method is to pressurize the water injection pump and inject it into the oil reservoir through the water injection well to maintain or restore the pressure of the oil layer, so that the oil reservoir has a strong driving force. Improve the production speed and recovery rate of oil reservoirs. Therefore, the water injection system is the basic guarantee for the stable production of the oil field, and the water injection pump is the "heart" of the water injection system. The ...
Claims
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IPC IPC(8): F04B53/02F04B53/00F04B53/22
CPCF04B53/00F04B53/02F04B53/22
Inventor 曹玉林宋海生秦兆刚安创峰刘朋远罗如岗赵士奇
Owner 中海石油中国有限公司秦皇岛326作业公司