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Eccentric-wear-preventing packing for oil extraction

A technology of grinding and anti-biasing, which is applied in earth-moving drilling, drilling equipment, wellbore/well components, etc., can solve the problems of poor elastic compensation ability of packing, short service life of packing, and low utilization rate of base material, etc. To achieve the effect of reducing the difficulty of replacement, reducing one downtime and reducing labor intensity

Pending Publication Date: 2019-12-31
张程
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the problems of difficult digging out when replacing the existing packing, poor elastic compensation ability of the packing, premature failure of the packing due to partial wear of the polished rod, short service life of the packing, and low utilization rate of the base material after the packing fails.

Method used

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  • Eccentric-wear-preventing packing for oil extraction
  • Eccentric-wear-preventing packing for oil extraction

Examples

Experimental program
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Effect test

Embodiment Construction

[0021] Such as figure 1 , figure 2 As shown, an anti-eccentric wear packing for oil production includes two semi-annular disc root bodies 1; a liquid chamber 2 is designed inside the disc root body 1, and the liquid chamber 2 is filled with a filling liquid.

[0022] The liquid chamber 2 is an annular space matching the shape of the disc root body 1 .

[0023] The thickness of the outer side of the top of the disc root body 1 from the liquid chamber 2 is smaller than the thickness of the inner side of the top of the disc root body 1 from the liquid chamber 2, which not only ensures the strength of the top of the packing, but also saves the use of raw materials. At the same time, when replacing the packing , easy to remove the old packing. The outer wall thickness of the disc body 1 on the outer side of the liquid chamber 2 is 2 mm, which ensures the overall strength of the packing and reduces the material consumption of the non-friction contact surface. The inner wall thic...

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Abstract

The invention relates to the technical field of polish rod sealing devices of oil pumping units in oil fields, in particular to an eccentric-wear-preventing packing for oil extraction. The packing comprises two semi-annular packing bodies; the packing bodies are internally provided with liquid cavities, and the liquid cavities are filled with filling liquid. The liquid cavities are formed in the packing, the packing replacement difficulty is reduced, the elasticity compensation capability of the packing is increased, the sealing effect of the packing is improved, the packing automatically adapts to the deviation degree of a polish rod and a wellhead, eccentric wear phenomena are eliminated, the use of parent metal is reduced, the service life of the packing is greatly prolonged, the structure is simple, and the use is convenient.

Description

Technical field: [0001] The invention relates to the technical field of a polished rod sealer for an oil field pumping unit, in particular to an anti-eccentric wear packing for oil production. Background technique: [0002] The polished rod sealer of the pumping unit is mainly composed of the packing box on the top of the oil tree and the packing in the box. With the continuous reciprocating movement of the polished rod, the contact surface between the packing and the polished rod will gradually wear and tear, increasing the pressure of the packing box. Cover the pressure, adjust the sealing ability, until the pressure can no longer increase the sealing ability and replace the new packing. [0003] The packing is deformed under the vertical axial pressure of the packing box gland, and the radial pressure is generated through the deformation, which promotes the tight combination between the packing and the polished rod to achieve the sealing effect. There are many kinds of p...

Claims

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Application Information

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IPC IPC(8): E21B33/03E21B17/10
CPCE21B33/03E21B17/1085
Inventor 张程张桐语
Owner 张程
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