Dynamic seal combination plunger assembly with protection device for oil field plunger well pump
A protection device and combined column technology, which is applied to the components of the pumping device for elastic fluids, pump components, variable displacement pump components, etc. Short service life and other problems, to achieve the effect of improving service life, low cost and avoiding direct contact
Active Publication Date: 2016-06-15
许冲
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Problems solved by technology
[0003] 1. The defect of the soft hydraulic feedback seal structure is that the software and metal parts wear quickly and the service life is short
[0004] 2. The elastic metal ring seal structure can solve the sealing problem between the pump barrel and the plunger, but the metal seal ring is always in contact with the pump barrel during the movement of the plunger's up and down strokes, which greatly reduces the metal seal. The service life of the ring, the failure rate is relatively high
Method used
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Embodiment Construction
[0021] Such as figure 1 , figure 2 , image 3 Shown: a dynamic seal combination plunger assembly with a protection device for an oil field plunger oil well pump, the dynamic seal combination plunger assembly includes: an upper tube that is sequentially fitted on the outer tube wall of the center tube 1 from top to bottom Compensation sleeve 4, sealing sleeve 5 and lower compensation sleeve 8. The outer tube wall of the sealing sleeve 5 is fitted with a piston ring 6; the piston ring 6 is a steel ring, and an opening groove 6-1 is cut on the generatrix of the ring. There are multiple piston rings 6, and the multiple piston rings 6 are arranged sequentially without gaps; the outer cylindrical surface of the piston ring and the inner wall of the pump barrel 13 are sealing surfaces. The upper end of the upper compensation sleeve 4 is connected and locked with the central pipe 1 through the upper guide sleeve 2 ; the lower end of the lower compensation sleeve 8 is connected and...
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The invention discloses a dynamic sealing plunger assembly with a protection device for an oil field plunger oil pump, and relates to oil production equipment. The dynamic seal combined plunger assembly includes: an upper compensation sleeve, a sealing sleeve and a lower compensation sleeve. A plurality of piston rings are set on the outer tube wall of the sealing sleeve, and O-rings are installed in the piston rings. When the plunger moves from the top dead center to the bottom dead center, the pressure difference between the top and bottom of the plunger gradually disappears, that is, the pressure on the sealing section of the plunger gradually decreases until it disappears, and the sealing section is in a retracted state, reducing the working friction of the lower stroke and improving the The service life of the metal sealing ring. A protective sleeve is sandwiched between the piston ring and the sealing sleeve, and the protective sleeve is a thin-walled PTFE round tube. damage and prolong service life.
Description
technical field [0001] The invention relates to an oil production equipment used in an oil field, in particular to a dynamic seal combination plunger assembly with a protection device for an oil field plunger pump. Background technique [0002] In the existing oil field mechanical lifting oil production, the utilization rate of the plunger oil well pump accounts for the majority, and during the oil pumping process of the plunger oil well pump, there is rigid friction between the plunger and the pump barrel, and the sealing performance of the plunger oil well pump cannot be guaranteed. It fully cooperates with the reciprocating motion of the pumping unit, and its sealing performance tends to decrease gradually; especially in heavy oil, oil wells with a lot of sand in the oil, and polymer-containing oil wells, with the increase of time and wear, the plunger pump will lose its performance. Leakage increases gradually, resulting in low pumping efficiency and increased idle work ...
Claims
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IPC IPC(8): F04B53/14F04B53/02
Inventor 许冲张兴明
Owner 许冲