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A tightness regulator for wellhead packing of pumping unit

A pumping unit well and port packing technology, applied in the petroleum industry, lubricating compositions, etc., can solve the problems of poor sealing effect of packing packing, easy leakage of medium, etc., and achieve the effects of reducing resistance, reducing compression degree, and reducing volume

Active Publication Date: 2021-07-16
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at overcoming the problem in the background art that the wellhead packing of the existing oil pumping well is mostly made of integral rubber or its derivatives, and the sealing effect of the packing is poor, and the medium is easy to leak, and provides an oil pumping Special tightness regulator for wellhead packing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Mix 40 kg of 52#-56# semi-refined crude paraffin powder, 2kg of molybdenum disulfide powder, 10kg of silicon dioxide, and 5kg of polyamide in proportion at room temperature with a stirrer;

[0022] (2) Mix 1kg of p-phenylenediamine, 15kg of industrial lithium-based grease, and 5kg of base oil, mix and heat to 55-60°C and stir evenly. After cooling to room temperature, add it to the pre-mixed material in the agitator described in step (1). Stir continuously for 30 minutes to obtain the wellhead packing tightness regulator of the pumping unit of the present invention suitable for use in winter.

Embodiment 2

[0024] (1) Mix 75 kg of 58#-62# semi-refined crude paraffin powder, 10kg of molybdenum disulfide powder, 15kg of silicon dioxide, and 15kg of polyamide in proportion at room temperature with a stirrer;

[0025] (2) Mix 2kg of p-phenylenediamine, 30kg of industrial lithium-based grease, and 15kg of basic white oil, mix and heat to 55-60°C and stir evenly. After cooling to room temperature, add it to the pre-mixed material in the agitator described in step (1). , and continue stirring for 30 minutes to obtain the pumping unit wellhead packing tightness regulator of the present invention suitable for use in summer.

[0026] The industrial lithium base grease that embodiment 1-2 selects is 0# consistency lithium base grease. The wellhead packing tightness regulator of the pumping unit prepared in Example 1-2, when replacing the packing for the wellhead packing box of the pumping unit, the packing regulator of the present invention is mixed with various conventional fillers to quic...

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Abstract

The invention relates to an agent for adjusting the tightness of the wellhead packing of an oil pumping unit. The invention mainly solves the problems of material defect of wellhead sealing packing of existing pumping wells and high packing wear, poor sealing effect and easy leakage caused by low oil content of produced fluid. The wellhead packing tightness regulator of the pumping unit has the following components and proportions in terms of mass percentage: 52#—62# semi-refined crude paraffin powder 40-75%; general industrial lithium grease 15-30%; Molybdenum disulfide powder 2-10%; filler 10-15%; toughening agent 5-15%; anti-aging agent 1-2%; base oil 5-15%. The wellhead packing tightness regulator of the pumping unit can form a solid body with the packing without loss. When the ambient temperature exceeds the melting point of the paraffin wax of the corresponding label in the regulator, it can absorb the initial frictional heat between the packing and the polished rod and quickly reduce the surface temperature of the polished rod. , the regulator turns into a semi-fluid state, which can promote the deformation and creep of the packing, adjust the sealing state of the packing to achieve self-adaptation, minimize the wear of the packing, and achieve the best sealing effect.

Description

technical field [0001] The invention relates to the technical field of oil production engineering, in particular to a tightness regulator for wellhead packing of a pumping unit. Background technique [0002] The essence of the working nature of the packing type seal is to rely on the continuous application of external power to the packing to maintain the process of pressurizing the packing. Generally, the compressive force on the shaft is generated by tightening the gland bolts of the packing box. In the oil field production system, the wellhead packing of the pumping well is mostly made of integral rubber or its derivatives. The hardness of these packing materials is too high or too low. At the same time, due to the low oil content of the production fluid medium, the packing has poor lubricating ability, high friction with the polished rod, serious packing loss, poor sealing effect, and the problem of medium leakage is becoming more and more prominent. Contents of the inv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/06C10N30/06
Inventor 汤凯张文宇王洪亮申勇辉李志波赵浩男
Owner PETROCHINA CO LTD