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A pumping unit wellhead sealing packing capable of repairing polished rods
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A technology of sealing packing and pumping unit, which is applied in sealing/packing, wellbore/well parts, earthwork drilling and production, etc. It can solve problems such as excessive wear of packing, uneven surface of polished rod, and affecting the sealing effect of packing
Active Publication Date: 2021-06-15
PETROCHINA CO LTD +1
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Summary
Abstract
Description
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Problems solved by technology
[0004] The present invention aims to overcome the problem in the background technology that the existing polished rod seriously affects the sealing effect of the packing due to the excessive wear of the packing due to surface unevenness or damage, and provides a pumping unit wellhead sealing packing capable of repairing the polished rod
Method used
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Examples
Experimental program
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Effect test
Embodiment 1
[0027] (1) First, heat 25kg of rubber particles, 5kg of vinyl chloridecopolymer resin, 3kg of alumina, 15kg of phthalate diester, 15kg of epoxy resin powder, 5kg of talcum powder, and 5kg of SAP resin in the oven to 50-65°C, and then send into the mixer for continuous pre-mixing;
[0028] (2) After heating 5kg of 46-58# industrial paraffin to 80-90°C to melt, slowly add it into the running mixer, mix it with the pre-mixed raw materials, and continue stirring until completely absorbed and mixed;
[0029] (3) After detecting that the temperature of the material in the agitator drops below 45°C, add 1 kg of polyurethanefoaming agent and continue stirring for 20 minutes, then add 5 kg of molybdenum disulfide grease and 3 kg of base oil, and continue stirring until well mixed;
[0030] (4) After the mixed material is lowered to normal temperature, pour 2.5 kg of talcum powder into it again to mix and discharge the material, and keep it sealed.
Embodiment 2
[0032] (1) First, heat 50kg of rubber particles, 15kg of vinyl chloridecopolymer resin, 5kg of alumina, 25kg of phthalate diester, 20kg of epoxy resin powder, 10kg of talcum powder, and 10kg of SAP resin to 50-65°C, and send them into Continuous pre-mixing in the mixer;
[0033] (2) Heat 20kg of 46-58# industrial paraffin to 80-90°C and melt it, then add it to the running mixer, mix it with the pre-mixed raw materials, and continue stirring until completely absorbed and mixed;
[0034] (3) After detecting that the temperature of the material in the agitator has dropped below 45°C, put in 2kg of polyurethanefoaming agent and continue to stir for 20 minutes, then add 10kg of molybdenum disulfide grease and 5kg of base oil, and continue to stir until well mixed;
[0035] (4) After the mixed material is lowered to normal temperature, 5 kg of talcum powder is poured into it again, mixed and discharged, and sealed for preservation.
[0036] The pumping unit wellhead sealing packi...
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Abstract
The invention relates to a wellhead sealing packing of a pumping unit capable of repairing polished rods. It mainly solves the problem that the excessive abrasion of the packing caused by the uneven surface of the existing polished rod seriously affects the sealing effect of the packing of the packing. The pumping unit wellhead sealing packing capable of repairing polished rods has the following components and proportions in terms of mass percentages: 25-50% of rubber particles; 15-20% of epoxy resin; 5-20% of crude wax; 5% of SAP resin ‑10%; vinyl chloridecopolymer resin 5‑15%; plasticizer 15‑25%; dehumidifier 3‑5%; foaming agent 1‑2%; curing agent 0.2‑1.0%; talcum powder 5‑15%; Molybdenum disulfide lithium base grease 5‑10%; base oil 3‑5%. The pumping unit wellhead sealing packing capable of repairing polished rods can basically fill and harden the grooves on the surface defects of polished rods, achieve the effect of hot repair, reduce the excessive wear of packing caused by the uneven surface of polished rods, and extend the Root filler lifespan.
Description
technical field [0001] The invention relates to the technical field of oil productionengineering in oil fields, in particular to a wellhead sealing packing of a pumping unit capable of repairing polished rods. Background technique [0002] In recent years, due to the advancement of the scale of tertiary oil recovery in oilfields, various factors have caused surface damage to the polished rods of pumping wells due to electrochemical corrosion, chemical corrosion, electrical burns, and mechanical scraping. Damage to the polished rods also caused serious damage to the packing. Wear and tear directly leads to problems such as serious leakage at the wellhead, and it takes time and effort to replace the polished rod, which brings great trouble to oil field production. [0003] For the above problems, the current mainstream solution direction in the industry is mostly focused on the promotion of wear-resistant alloy coated polished rods, such as patent number CN200710118049.7 "An ...
Claims
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Application Information
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