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Special sealing filler applied to pumping-unit wellhead under condition of high-water-content produced liquid

A sealing packing and production fluid technology, which is applied in sealing/isolation, earthwork drilling, wellbore/well parts, etc., can solve problems such as water leakage and poor sealing effect of wellhead packing box, and achieve the purpose of prolonging the life of packing Effect

Active Publication Date: 2019-07-05
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

[0027] (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;

[0028] (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 ;

[0029] (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;

[0030] (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

[0032] (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;

[0033] (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 ℃;

[0034] (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;

[0035] (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.

[0036] 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 special sealing filler applied to a pumping-unit wellhead under a condition of high-water-content produced liquid. The invention mainly solves the problems the sealing effectof packing filler of a pumping-unit wellhead is poor and water leakage is serious in an existing condition of high-water-content produced liquid. The special sealing filler applied to the pumping-unitwellhead under the condition of high-water-content produced liquid is prepared from the following components in percentage by mass: 15-45% of rubber particles, 2-5% of epoxy resin, 5-15% of crude wax, 5-15% of bentonite, 5-15% of super absorbent polymer (SAP) resin, 5-10% of vinyl chloride copolymer resin, 1-2% of a polyurethane foaming agent, 0.2-1.0% of a curing agent and 5-15% of talcum powder. The special sealing filler applied to the pumping-unit wellhead under the condition of high-water-content produced liquid can absorb moisture leaked from the produced liquid, so that the abrasion parts of the filler are continuously supplemented, or medium leakage is delayed by water, and the purposes of replacing abraded filler and prolonging the service life of the packing filler are realized.

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 Applications(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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