Mfg. Method for integral cylinder stainless steel oil pumping pump

A manufacturing method, stainless steel technology, applied in the direction of pumps, earthwork drilling, pumps with flexible working elements, etc., can solve the problems of complex processing, short service life, low wear resistance, etc., achieve technical parameters improvement, machining process The effect of reducing and processing is simple

Inactive Publication Date: 2007-09-26
温海燕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the combination pump has been basically eliminated, because of its complex processing, it is mainly assembled into a 3-12-meter-long oil well pump (the outer sleeve is also long) with each section of 0.3-meter cylinder liner, which is prone to disorder and consumes steel. It takes a lot of time; carburizing pumps and chrome-plated pumps are now monopolizing the market, but carburizing pumps are mainly made of carbon structural steel (20# steel)
This material is corrosion-resistant and has low wear resistance; while the chromium layer of the chrome-plated pump is 0.07-0.12mm, and the inner surface is electroplated, it is easily scratched by sand, the service life is short, and it is easy to cause the pump to be stuck.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 2Cr13 stainless steel seamless steel pipe is used as the base material of the pump barrel, the outer diameter is φ76mm, the wall thickness is 8.5mm, after rolling twice, the outer diameter is φ50.8mm, the inner diameter is φ37.8+0.15~0.25mm, and the tensile strength is 950M Pa, the yield strength is 900 MPa, the hardness is 35°HRC, after straightening, the inner hole is ground to φ38.1+0~0.005mm, the two ends are turned into threads, and the threads on one end and the plasma deep hole The mold on the top of the heat treatment furnace is connected, the anode is installed in the center of the base material of the cylinder, and the base material is used as the cathode, and an intermittent insulation protection device is installed between the cathode and anode to prevent short circuit. Tightly seal the furnace cover, and vacuumize to make the vacuum in the furnace reach 75Pa. Then heat up, turn on the water circulation system, control the furnace temperature to 600±5°C, and...

Embodiment 2

[0030] 1Cr18Ni9Ti stainless steel seamless steel pipe is used as the base material of the pump barrel, its outer diameter is φ76mm, wall thickness is 8.5mm, after rolling twice, its outer diameter is φ50.8mm, inner diameter is φ37.8+0.15~0.25mm, and the tensile strength is 1000M Pa, the yield strength is 950 MPa, the hardness is 35°HRC, after straightening, the inner hole is ground to φ38.1+0~0.005mm, the two ends are threaded, and the thread at one end is connected with the plasma deep hole The mold on the top of the heat treatment furnace is connected, the anode is installed in the center of the base material of the cylinder, and the base material is used as the cathode, and an intermittent insulation protection device is installed between the cathode and anode to prevent short circuit. Tightly seal the furnace cover, and vacuumize to make the vacuum in the furnace reach 80Pa. Then heat up, turn on the water circulation system, control the temperature to 600±5°C, and the fur...

Embodiment 3

[0032] 1Cr18Ni9Ti stainless steel seamless steel pipe is used as the base material of the pump barrel, its outer diameter is φ76mm, wall thickness is 8.5mm, after rolling twice, its outer diameter is φ50.8mm, inner diameter is φ37.8+0.15~0.25mm, and the tensile strength is 1000M Pa, the yield strength is 950 MPa, the hardness is 35°HRC, after straightening, the inner hole is ground to φ38.1+0~0.005mm, the two ends are threaded, and the thread at one end and plasma infiltration hole The tires on the top of the heat treatment furnace are connected, the anode is installed in the center of the base material of the cylinder, and the base material is used as the cathode, and an intermittent insulation protection device is installed between the cathode and the anode to prevent short circuit. Tightly seal the furnace cover, and vacuumize to make the vacuum in the furnace reach 78Pa. Then heat up, turn on the water circulation system, control the furnace temperature to 600±5°C, and the...

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Abstract

The invention relates to a method of manufacturing an oil field used full-tank stainless steel oil well pump. The basis material of the pump tank is stainless steel seamless steel tube whose outside diameter is 20mm to 25mm bigger than the pump tank and the wall is 2.0mm to 2.5mm bigger. The required size of the inside diameter and outer diameter, the tensile strength between 900MPa to 1000MPa, anti-yield strength between 850MPa to 950MPa and hardness at 35 degree HRC would be available after rolling for one to three times. And hang it on the top of the plasma deep-hole heat-treatment furnace after alignment, abrading and threading at the both ends. Then, put the anode into the basis material and the basis material itself is used as the cathode. The vacuum degree is controlled between 50Pa to 80Pa. The furnace temperature is controlled at 595 degree centigrade to 605 degree centigrade. The inside pressure of the furnace is 80Pa to 100Pa. The impulse high voltage between 800V to 1000V is impressed between the anode and the cathode. Meanwhile, alkaline air is injected in. The depth of the alkaline layer is about 0.4mm to 0.5mm and the hardness is more than 65 degree HRC.

Description

technical field [0001] The invention relates to a method for manufacturing a whole cylinder oil well pump used in an oil field, in particular to a method for manufacturing a whole cylinder stainless steel oil well pump barrel. Background technique [0002] The sand, alkali and acid content in the oil field is relatively large, there are many polymers, and the chemical composition is complex, which will cause wear and corrosion to the oil well pump and shorten its service life. At present, there are three types of oil well pumps used in China: 1. Combination pumps with alloy structural steel surface heat-treated (hereinafter referred to as combined pumps); 2. Whole cylinder carburizing pumps with carbon structural steel surface heat-treated (hereinafter referred to as carburizing pumps); 3. The whole cylinder chrome-plated pump with electroplating on the inner surface of carbon structural steel (hereinafter referred to as chrome-plated pump). The oi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B47/00E21B43/00
Inventor 温海燕温义有
Owner 温海燕
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