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Method for preparing wear-resistant and high-temperature-resistant composite material by filling PTFE with nano BN

A composite material and PTFE technology, which is applied in the field of preparation of wear-resistant and high-temperature resistant materials, can solve problems such as low softening temperature, wear, and shedding, and achieve the effect of improving friction and wear resistance and wear resistance

Inactive Publication Date: 2016-11-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the UHMWPE plastic on the outer surface of the coupling has a low softening temperature. When the well depth is large and the downhole temperature is high, the UHMWPE plastic sintered on the outer surface of the sucker rod coupling will be quickly worn out. fall off

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First disperse 1 mass part of nano-hexagonal phase BN and 1 mass part of cetyltrimethylammonium bromide (CTAB) into 200 mass parts of ethanol aqueous solution or acetone aqueous solution, stir at room temperature for 0.5h and then add 100 Parts by mass of polytetrafluoroethylene (PTFE) were stirred for 0.5 h until uniformly mixed, and then dried at 60° C. to obtain a mixed powder. Then put the above mixed powder into the cavity of the mold, preheat at 250°C for 10 minutes, then hold the pressure at 10MPa for 15 minutes, take it out after pressure relief, and then put the compacted blank and the mold into the muffle furnace , fired at 370°C for 1 hour, then cold-pressed for 20 minutes, demolded, and the composite material sample was taken out.

[0019] The sample is under the load of 200N, the friction is 24000r, and the tensile properties are measured according to GB1040-2006. The friction coefficient and wear are shown in Table 1.

[0020] As a reference, preheat pur...

Embodiment 2

[0022] First disperse 5 parts by mass of nano-hexagonal BN and 5 parts by mass of sodium dodecyl sulfate (SDS) into 300 parts by mass of acetone, stir at room temperature for 0.5 h, then add 100 parts by mass of polytetrafluoroethylene and stir for 0.5 h to mix evenly, and then dry at 60°C to obtain mixed powder. Then put the above mixed powder into the cavity of the mold, preheat at 280°C for 5 minutes, then hold the pressure at 15MPa for 10 minutes, take it out after the pressure is released, and then put the pressed blank and the mold into the muffle furnace , fired at 350°C for 2 hours, then cold pressed for 20 minutes, demolded, and the composite material sample was taken out.

[0023] The sample is under the load of 200N, the friction is 24000r, and the tensile properties are measured according to GB1040-2006. The friction coefficient and wear are shown in Table 1.

Embodiment 3

[0025] First disperse 10 parts by mass of nano-hexagonal BN and 10 parts by mass of dodecyl dimethyl betaine (BS-12) into 250 parts by mass of ethanol, stir at room temperature for 0.5 h, then add 100 parts by mass of poly Stir the tetrafluoroethylene for 0.5h until it is evenly mixed, then dry it at 60°C to obtain the mixed powder, then put the above mixed powder into the cavity of the mold, preheat at 200°C for 20min, and then keep it under the pressure of 20MPa Press for 10 minutes, take it out after releasing the pressure, then put the pressed billet and mold together into the muffle furnace, burn at 390°C for 0.5h, then cold press for 20 minutes, take it out. The sample is under the load of 200N, the friction is 24000r, and the tensile properties are measured according to GB1040-2006. The friction coefficient and wear are shown in Table 1.

[0026] Table 1 Friction and wear properties and mechanical properties of modified PTFE

[0027] sample

reference

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Abstract

The invention provides a method for preparing a wear-resistant and high-temperature-resistant composite material by filling PTFE with nano BN, and relates to the technical field of oil extraction in an oil field. The method comprises the steps that nano hexagonal-phase BN is dispersed in a solvent through surfactant and then filled into PTFE, drying, mold pressing and sintering are conducted, and the wear-resistant and high-temperature-resistant composite material is obtained. According to the method for preparing the wear-resistant and high-temperature-resistant composite material by filling PTFE with nano BN, the defects that the size is small, surface energy is high, and agglomeration is prone to occur are overcome, high dispersion of nano hexagonal-phase BN in PTFE is achieved, rub resistance and wear resistance of the composite material are significantly improved, the composite material is applied to sucker-rod coupling, for the polytetrafluoroethylene composite material filled with nano boron nitride, the usage temperature can reach 160 DEG C or above, and compared with pure polytetrafluoroethylene, the wear resistance is greatly improved.

Description

technical field [0001] The invention relates to the technical field of oil production in oil fields, in particular to the preparation technology of wear-resistant and high-temperature-resistant materials for anti-eccentric wear couplings used for rod pumping. Background technique [0002] The current method to improve the wear resistance of the sucker rod coupling is to set a layer of wear-resistant non-metallic layer on the outer surface of the metal part of the sucker rod coupling. The material of this non-metallic layer can be ultra-high molecular weight polyethylene, Polyurethane, polytetrafluoroethylene, etc., Jiangsu Oilfield has developed a flexible anti-wear sucker rod coupling ("Drilling and Production Technology", May 2013). Through the flexible anti-wear coupling, the sucker rod can be deflected in any direction, changing the partial wear into full wear; changing the rigid connection into a flexible connection, which reduces the positive pressure of the sucker rod...

Claims

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Application Information

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IPC IPC(8): C08K3/38C08K9/04C08L27/18
CPCC08K3/38C08K9/04C08K2003/385C08L2201/08C08L27/18
Inventor 唐海军马建杰石国军邹俊松
Owner CHINA PETROLEUM & CHEM CORP
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