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A special sealing packing applied to the wellhead of the pumping unit under the condition of high water-cut production fluid

A technology of sealing packing and produced fluid, applied in the directions of sealing/isolation, earth-moving drilling, wellbore/well components, etc., can solve the problems of water leakage, poor sealing effect of wellhead packing box, etc. Effect

Active Publication Date: 2021-06-15
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims to overcome the problems of poor sealing effect and serious water leakage of the wellhead packing box of the pumping unit under the condition of high water content production fluid in the background technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Heat 15 kg of rubber particles, 5 kg of bentonite, and 5 kg of SAP resin in agitator A to 45-50°C in proportion, and send them into the agitator for continuous pre-mixing;

[0027] (2) Heat 5kg of 46-58# industrial paraffin to 80-90°C, add it into the mixer A, mix it with the pre-mixed raw materials, continue to stir until it is completely absorbed and mixed, and at the same time continue to cool down to 40-50°C ;

[0028] (3) Heat 5 kg of vinyl chloride copolymer resin, 1 kg of polyurethane foaming agent, 2 kg of epoxy resin, and 0.5 kg of curing agent isocyanate to 45-50 °C in the mixer B, stir for 15-30 min, and pour in talc powder 5kg is mixed and moved to A mixer to continue stirring for 30-60min;

[0029] (4) The above-mentioned mixed material is poured into a long groove-shaped mold with a preset release agent, and it can be taken out after 24 hours after it is basically solidified.

Embodiment 2

[0031] (1) Heat 45kg of rubber particles, 15kg of bentonite, and 15kg of SAP resin in agitator A to 45-50°C in proportion, and send them into the agitator for continuous pre-mixing;

[0032] (2) Heat 15 kg of 46-58# industrial paraffin to 80-90°C, add it into the mixer A, mix it with the pre-mixed raw materials, continue to stir until it is completely absorbed and mixed, and at the same time continue to cool down to 40-50°C ℃;

[0033] (3) Heat 10kg of vinyl chloride copolymer resin, 2kg of polyurethane foaming agent, 5kg of epoxy resin, and 1kg of curing agent isocyanate to 45-50°C in mixer B, stir for 15-30min, pour 10kg of talc powder into the mixture After uniform, move to A mixer and continue to stir for 30-60min;

[0034] (4) Pour the mixed material into a long groove-shaped mold with a preset release agent, and wait for 24 hours to basically solidify before use.

[0035] The special sealing packing applied to the wellhead of the pumping unit prepared in Example 1-2 un...

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Abstract

The invention relates to a special sealing packing applied to the wellhead of a pumping unit under the condition of high water content production fluid. It mainly solves the problems of poor sealing effect and serious water leakage of the wellhead packing box of the pumping unit under the condition of the existing high water content produced fluid. The special sealing packing applied to the wellhead of the pumping unit under the condition of high water-cut production fluid, its components and proportions are as follows in terms of mass percentage: rubber particles 15-45%; epoxy resin 2-5%; crude wax 5-5% 15%; bentonite 5‑15%; SAP resin 5‑15%; vinyl chloride copolymer resin 5‑10%; polyurethane foaming agent 1‑2%; curing agent 0.2‑1.0%; talc 5‑15%. The special sealing packing applied to the wellhead of the pumping unit under the condition of high water-cut production fluid can absorb the water leaked from the production fluid, continuously replenish the worn part of the packing or use water to delay the occurrence of medium leakage, and realize the wear and prolongation of replacement packing. Purpose of packing life.

Description

technical field [0001] The invention relates to the technical field of oil production engineering in oil fields, in particular to a special sealing packing applied to the wellhead of a pumping unit under the condition of high water content production fluid. Background technique [0002] In the oilfield production system, the wellhead packing of pumping wells is mostly made of integral rubber or its derivatives. In recent years, the intensification of water injection production and tertiary recovery in oilfields has caused the water content of the produced fluid to increase and the oil content to decrease, and Affected by various factors, the sealing effect of the packing in the wellhead packing box has deteriorated, and the problem of medium leakage has become increasingly prominent. Many pumping wells are full of water in summer and icebergs in winter, and the pressure on environmental protection is extremely high. For the above problems, the current mainstream solution dir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L17/00C08L63/00C08L91/06C08L33/02C08L27/06C08K9/04C08K3/34C08K5/29C08J9/04C09K3/10E21B33/03
CPCC08J9/04C08J2317/00C08J2433/02C08J2463/00C08J2491/06C08L17/00C08L2205/035C08L2207/24C09K3/10C09K2003/1046E21B33/03C08L63/00C08L91/06C08L33/02C08L27/06C08K9/04C08K3/34C08K5/29
Inventor 汤凯王洪亮张文宇申勇辉李志波杨海波
Owner PETROCHINA CO LTD
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