A pumping unit wellhead sealing packing with slow-release self-lubricating function

A sealing packing and self-lubricating technology, applied in the field of oil production engineering in oil fields, can solve the problems of easy leakage of medium, poor lubrication performance and sealing effect of wellhead packing box, etc., and achieve the effects of prolonging life, low thermal wear and reducing equipment energy consumption.

Active Publication Date: 2021-04-27
PETROCHINA CO LTD +1
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims to overcome the problems of poor lubricating performance and sealing effect of the wellhead packing box and easy leakage of the medium existing in the background technology, and provide a sealing packing with slow-release self-lubricating function

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) First, put 25kg of rubber particles with a diameter between 1-10mm and 5kg of talc powder into the mixer for continuous stirring and premixing, then heat 15kg of 46-62# semi-refined paraffin wax to 80-90°C and completely melt , add to the running mixer, mix with the pre-mixed raw materials, and continue to stir for 30-60 minutes until completely absorbed and mixed;

[0027] (2) When the temperature in the agitator drops to 50-65°C, add 5kg of vinyl chloride copolymer resin, 3kg of alumina, 15kg of phthalic acid diester, and 5kg of epoxy resin and mix continuously for 30 minutes;

[0028] (3) After detecting that the temperature of the material in the agitator has dropped below 45°C, continue to put in 15 kg of 52#—62# semi-refined crude paraffin wax powder, 0.5 kg of foaming agent polyurethane, and 0.5 kg of curing agent isocyanate and continue stirring for 10-20 minutes , then add 5 kg of molybdenum disulfide grease and 3 kg of paraffin-based mineral oil, and conti...

Embodiment 2

[0031] (1) First, put 45kg of high-glue rubber particles with a diameter between 1-10mm and 10kg of talcum powder into the mixer for continuous stirring and premixing, then heat 20kg of 46-62# industrial paraffin to 80-90°C and completely melt , add to the running mixer, mix with the pre-mixed raw materials, and continue to stir for 30-60 minutes until completely absorbed and mixed;

[0032] (2) When the temperature in the agitator drops to 50-65°C, add 10kg of vinyl chloride copolymer resin, 5kg of alumina, 25kg of phthalic acid diester, 10kg of epoxy resin particles and other ingredients and continue to mix and stir for 30min;

[0033] (3) After detecting that the temperature of the material in the agitator has dropped below 45°C, continue to put in 25 kg of 46-62# industrial paraffin powder, 1 kg of polyurethane foaming agent, and 1 kg of curing agent isocyanate and continue stirring for 10-20 minutes, and then mix the two Add 15 kg of molybdenum sulfide grease and 5 kg of ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to a wellhead sealing packing of a pumping unit with slow-release self-lubricating function. The utility model mainly solves the problem that the sealing effect of the existing wellhead sealer deteriorates and the medium easily leaks, which causes increased energy consumption and reduces the service life of the packing. The pumping unit wellhead sealing packing with slow-release self-lubricating function has the following components and proportioning by mass percentage: rubber particles 25-45%; epoxy resin 2-5%; 46-62# semi-refined paraffin wax 15% ‑20%; 52#—62# semi-refined crude paraffin powder 10‑15%; vinyl chloride copolymer resin 5‑10%; plasticizer 15‑25%; dehumidifier 3‑5%; foaming agent 0.5‑1% ; Curing agent 0.2‑1.0%; Talc powder 5‑15%; Molybdenum disulfide lithium-based grease 5‑15%; Base oil 3‑5%. The pumping unit wellhead sealing packing with slow-release self-lubricating function improves the material of the packing and provides a solid and liquid slow-release lubricant structure, which can slowly release the lubricating ability according to the contact pressure between the polished rod and the packing, reducing The stroke resistance of the polished rod reduces the energy consumption of the equipment and prolongs the life of the packing.

Description

technical field [0001] The invention relates to the technical field of oil production engineering in oil fields, in particular to a wellhead sealing packing for pumping units with slow-release self-lubricating function. Background technique [0002] In the oil field production system, the wellhead packing of the pumping unit is mostly made of integral rubber or its derivatives. In order to ensure its good operation, some lubricating grease needs to be added at the same time when filling to reduce the friction between the polished rod and the packing. At the same time, the crude oil contained in the produced fluid also plays a certain lubricating effect on the two. In recent years, affected by the rise of water content and the loss of conventional grease, the sealing effect of the wellhead packing box has deteriorated, and the problem of medium leakage has become increasingly prominent. In view of the above problems, the current mainstream solution direction in the industry i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C08L21/00C08L63/00C08L27/06C08L91/00C08L91/06C08K13/02C08K5/12C08K3/22C08K3/30C08K3/34C08J9/04
Inventor 汤凯杨海波张文宇王洪亮李静申勇辉
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap