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CN-121758842-B - Wear-resistant tower type packing for petroleum drilling equipment and preparation method thereof

CN121758842BCN 121758842 BCN121758842 BCN 121758842BCN-121758842-B

Abstract

The invention discloses a wear-resistant tower type packing for petroleum drilling equipment, which comprises 100 parts of rubber compound, 1-1.5 parts of stearic acid, 30-40 parts of filler, 20-25 parts of N330 carbon black, 8-10 parts of graphite, 2.3-2.6 parts of sulfur, 2.4-3 parts of accelerator and 12-15 parts of dioctyl phthalate. The adopted rubber matrix has high wear resistance and rebound resilience, and reinforcing cloth is transversely distributed in the rubber matrix, so that the service life of the packing can be greatly prolonged.

Inventors

  • TANG LIGUO
  • WANG CHENGJIE
  • QI JIAN
  • YANG LEI

Assignees

  • 新疆耶路高特工贸有限公司

Dates

Publication Date
20260512
Application Date
20260228

Claims (6)

  1. 1. A preparation method of a wear-resistant tower type packing for petroleum drilling equipment is characterized in that the wear-resistant tower type packing comprises a packing (1), wherein the packing (1) is a tower type spiral packing, the packing (1) is composed of a rubber matrix (3) and reinforcing cloth (2), the rubber matrix is prepared from the following raw materials, by weight, 100 parts of mixed rubber, 1-1.5 parts of stearic acid, 30-40 parts of a filler, 20-25 parts of N330 carbon black, 8-10 parts of graphite, 2.3-2.6 parts of sulfur, 2.4-3 parts of an accelerator and 12-15 parts of dioctyl phthalate, and the filler is prepared by mixing zinc oxide whiskers, aluminum-magnesium hydrotalcite and nano silicon nitride according to a weight ratio of 5:5:1-2; The preparation method of the wear-resistant tower-type packing comprises the following steps: 1) Adding the rubber compound into an internal mixer for plasticating, adding stearic acid, filler, N330 carbon black, graphite and dioctyl phthalate for mixing after wrapping a roller, adding sulfur and an accelerator for continuous mixing after uniform mixing, and discharging after uniform mixing; 2) Mixing the product obtained in the step 1) with a solvent to prepare adhesive cement, dip-coating the adhesive cement on the reinforcing cloth, and drying to form adhesive plaster; 3) Cutting the rubberized fabric into a circular shape, stacking the rubberized fabric on a cylinder (5) in a die (4), pre-pressing and forming the rubberized fabric, filling the rubber material prepared in the step 1) in the die, pressing and vulcanizing the rubber material for forming, and spirally cutting the rubber material to obtain the product.
  2. 2. The method for preparing the wear-resistant tower-type packing for the petroleum drilling equipment, which is disclosed in claim 1, is characterized in that the rubber compound is formed by mixing nitrile rubber and butadiene rubber according to a weight ratio of 7-8:2.
  3. 3. The method for preparing the wear-resistant tower-type packing for the petroleum drilling equipment, which is disclosed in claim 1, is characterized in that the accelerator is formed by mixing an accelerator DM and an accelerator CZ according to a weight ratio of 1:1.
  4. 4. The method for preparing the wear-resistant tower type packing for the petroleum drilling equipment according to claim 1, wherein the zinc oxide whisker is loaded with CeO 2 , and the loading method comprises the following steps: And dispersing Ce (NO 3 ) 3 ·6H 2 O, PVP-K30) in an ethanol water solution, adding zinc oxide whiskers, stirring at 170-180 ℃ for reaction for 24-28h, centrifuging, washing and drying to obtain a product, wherein the weight ratio of the zinc oxide whiskers to the Ce (NO 3 ) 3 ·6H 2 O, PVP-K30 is 9-10:2:1.
  5. 5. The method for preparing the wear-resistant tower type packing for the petroleum drilling equipment, which is disclosed in claim 1, is characterized in that the aluminum-magnesium hydrotalcite is modified aluminum-magnesium hydrotalcite, and is prepared by the following steps: Slowly dropwise adding an ethanol solution of 1, 10-decanediamine into an ethanol solution of citric acid under the condition of ice water bath, wherein the molar ratio of the 1, 10-decanediamine to the citric acid is 3:2, stirring for 20-30min, carrying out reflux stirring reaction at 60-70 ℃ for 2h, standing for 24h, filtering out precipitate, washing and drying to obtain a product I; And mixing the product I and aluminum-magnesium hydrotalcite according to the weight ratio of 1-1.5:1, dispersing in ethanol, refluxing and stirring at 90 ℃ for 18-20h, filtering, washing and drying to obtain the product.
  6. 6. The method for manufacturing a wear-resistant tower packing for petroleum drilling equipment according to claim 1, wherein the reinforcing cloth is polytetrafluoroethylene fiber cloth or aramid fiber cloth.

Description

Wear-resistant tower type packing for petroleum drilling equipment and preparation method thereof Technical Field The invention relates to the technical field of petroleum drilling equipment, in particular to a wear-resistant tower type packing for petroleum drilling equipment and a preparation method thereof. Background The packing for oil drilling equipment is common, such as a packing box of an oil pumping well, is a sealing device of a wellhead, and plays a sealing role with the packing in the packing box when a polish rod moves up and down. In the prior art, a packing is used for petroleum drilling equipment, more packing is spirally coated, the packing is shaped like a cone or a tower, the packing is embedded into a polish rod of a pumping well to play a role of sealing, and because the polish rod is continuously operated, the packing is required to have good wear resistance and rebound resilience, in order to increase the wear resistance of the spiral packing, the inner side contacted with the polish rod is coated with a rubber cloth layer in the prior art, the structure has the defects that 1, the rubber cloth is easily rolled up from rubber under the action of longitudinal friction with the polish rod to influence the tightness of the packing, 2, the preparation process of the rubber cloth coating is complex, and 3, the rubber cloth coating layer has limited improvement on the wear resistance when the wear resistance is insufficient, so that the packing is frequently replaced, and the service life is short. Disclosure of Invention In view of the above, the invention aims to overcome the defects in the prior art, and provides the wear-resistant tower-type packing for the petroleum drilling equipment, wherein the adopted rubber matrix is high in wear resistance and rebound resilience, and reinforcing cloth is transversely distributed in the rubber matrix, so that the service life of the packing can be greatly prolonged. In order to achieve the above purpose, the invention adopts the following technical scheme: The wear-resistant tower type packing for the petroleum drilling equipment comprises 100 parts of rubber compound, 1-1.5 parts of stearic acid, 30-40 parts of filler, 20-25 parts of N330 carbon black, 8-10 parts of graphite, 2.3-2.6 parts of sulfur, 2.4-3 parts of accelerator and 12-15 parts of dioctyl phthalate. Further, the rubber compound is formed by mixing nitrile rubber and butadiene rubber according to the weight ratio of 7-8:2. Further, the accelerator is formed by mixing an accelerator DM and an accelerator CZ according to a weight ratio of 1:1. Further, the filler is formed by mixing zinc oxide whisker, aluminum magnesium hydrotalcite and nano silicon nitride according to the weight ratio of 5:5:1-2. Further, the CeO 2 is loaded on the zinc oxide whisker, and the loading method comprises the following steps: And dispersing Ce (NO 3)3·6H2 O, PVP-K30) in an ethanol water solution, adding zinc oxide whiskers, stirring at 170-180 ℃ for reaction for 24-28h, centrifuging, washing and drying to obtain a product, wherein the weight ratio of the zinc oxide whiskers to the Ce (NO 3)3·6H2 O, PVP-K30 is 9-10:2:1. Further, the aluminum-magnesium hydrotalcite is modified aluminum-magnesium hydrotalcite and is prepared by the following steps: Slowly dropwise adding an ethanol solution of 1, 10-decanediamine into an ethanol solution of citric acid under the condition of ice water bath, wherein the molar ratio of the 1, 10-decanediamine to the citric acid is 3:2, stirring for 20-30min, carrying out reflux stirring reaction at 60-70 ℃ for 2h, standing for 24h, filtering out precipitate, washing and drying to obtain a product I; And mixing the product I and aluminum-magnesium hydrotalcite according to the weight ratio of 1-1.5:1, dispersing in ethanol, refluxing and stirring at 90 ℃ for 18-20h, filtering, washing and drying to obtain the product. A preparation method of a wear-resistant tower-type packing comprises the following steps: 1) Adding the rubber compound into an internal mixer for plasticating, adding stearic acid, filler, N330 carbon black, graphite and dioctyl phthalate for mixing after wrapping a roller, adding sulfur and an accelerator for continuous mixing after uniform mixing, and discharging after uniform mixing; 2) Mixing the product obtained in the step 1) with a solvent to prepare adhesive cement, dip-coating the adhesive cement on the reinforcing cloth, and drying to form adhesive plaster; 3) Cutting the rubberized fabric into a circular shape, stacking the circular shape on a cylinder in a mould, pre-pressing and forming the circular shape, filling the rubber material prepared in the step 1) in the mould, pressing and vulcanizing the circular shape, and spirally cutting the circular shape to obtain the finished product. Further, the reinforcing cloth is polytetrafluoroethylene fiber cloth or aramid fiber cloth. The beneficial effects of the invention are as follows: 1. The applica