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Anticorrosion and anti-degumming screw drill special for high-sulfur-content oil-gas well and machining process of anticorrosion and anti-degumming screw drill

A technology for screw drilling tools and oil and gas wells, which is applied to anti-corrosion coatings, driving devices for drilling in boreholes, earthwork drilling and production, etc. It can solve the problems of not being able to adapt to the use of high-sulfur oil and gas wells, reduced toughness of metal materials, and high cost. , to achieve the effects of obvious thermal swelling resistance, super toughness and economical cost

Active Publication Date: 2019-08-09
YANCHENG HUAYA GASOLINEEUM MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the increasing demand for oil and gas resources, oil development gradually shifts to ultra-deep formations, high-sulfur and ultra-high-pressure complex formations. At present, about 20% of oil and gas fields are high-pressure and high-temperature (temperature above 150°C, pressure above 105MPa) oil and gas fields, and most of them contain high concentration CO 2 and H 2 S gas, there are more than 400 sulfur-containing oil and gas fields with proven industrial exploitation value in the world. In the development technology of high-temperature, high-pressure and high-sulfur oil and gas fields, my country has formed a complete technical system from scratch, from existing to excellent, and high The domestic screw drilling tools used in sulfur-containing oil and gas wells have never been mature technology. Imported from the United States is expensive and inconvenient to maintain. The domestic drilling tools include four parts: stator assembly, cardan shaft assembly, transmission shaft assembly, and bypass valve assembly. It cannot be used in high-sulfur oil and gas wells. The weakest link is the stator of the motor assembly. The stator rubber bushing of the motor assembly is generally made of nitrile rubber. CO in sulfur-containing oil and gas wells 2 , methane, H 2 S. Organic sulfides in sulfur-containing crude oil will cause strong corrosion to NBR in nitrile, making it embrittled, hardened, invalidated, and peeled off; followed by metal parts such as rotors, cardan shafts, and transmission shafts of drilling tools In high sulfur oil and gas wells with H 2 When S and acidic medium coexist, the metal corrosion rate will be greatly increased, and then hydrogen damage, corrosion, and hydrogen-induced peeling will occur, which will reduce the toughness, crack, brittle fracture, and perforation of the metal material, resulting in drilling and workover accidents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A processing technology for anti-corrosion and anti-degumming screw drilling tools specially used for high-sulfur oil and gas wells, including the following process steps:

[0035] (1) Making motor stator rubber bushing:

[0036] 15% neoprene rubber, 20% acrylic ester, 3% fluorine rubber TP246, 20% chlorohydrin rubber, 10% 6μm modified ultrafine carbon fiber powder, the fiber length is 10mm, and 15% polymer polymer Ethylene is uniformly mixed and co-refined;

[0037] (2) Add 3% dibenzothiazole disulfide, 2% zinc oxide activator, and 2% dibutyl phthalate softener to the rubber compound obtained in the mixing step (1). About 3% of anti-aging agent A is added in batches with 3% of nano-silica reinforcing agent, 2% of cobalt salt coagulant, and 2% of triazine adhesive to make synthetic rubber for motor stator rubber bushing;

[0038] (3) Make the metal casing of the motor stator, use high-pressure fluid as the driving force on the inner wall of the metal casing of the mot...

Embodiment 2

[0045] A processing technology for anti-corrosion and anti-degumming screw drilling tools specially used for high-sulfur oil and gas wells, including the following process steps:

[0046] (1) Making motor stator rubber bushing:

[0047] 20% neoprene rubber, 10% acrylic ester, 5% fluorine rubber TP246, 10% chlorohydrin rubber, 12% 5μm modified ultrafine carbon fiber powder, the fiber length is 13mm, and 20% polymer polymer Ethylene is uniformly mixed and co-refined;

[0048] (2), add 4% of dibenzothiazole disulfide, 3% of zinc oxide activator, and 3% of dibutyl phthalate softener to the rubber compound obtained in the mixing step (1). About 4% of anti-aging agent A is added in batches with 5% of nano-silica reinforcing agent, 3% of cobalt salt coagulant, and 1% of triazine adhesive to make synthetic rubber for motor stator rubber bushing;

[0049] (3) Make the metal casing of the motor stator, use high-pressure fluid as the driving force on the inner wall of the metal casing ...

Embodiment 3

[0056] A processing technology for anti-corrosion and anti-degumming screw drilling tools specially used for high-sulfur oil and gas wells, including the following process steps:

[0057] (1) Making motor stator rubber bushing:

[0058] 218% neoprene rubber, 18% acrylic ester, 4% fluorine rubber TP246, 16% chlorohydrin rubber, 11% 4μm modified ultrafine carbon fiber powder, the average length of the fiber is 15mm, and 16% polymer polymer Ethylene is uniformly mixed and co-refined;

[0059] (2) Add 3% dibenzothiazole disulfide, 2% zinc oxide activator, and 2% dibutyl phthalate softener to the rubber compound obtained in the mixing step (1). About 3% of anti-aging agent A is added in batches with 4% of nano-silica reinforcing agent, 1% of cobalt salt coagulant, and 1% of triazine adhesive to make synthetic rubber for motor stator rubber bushing;

[0060] (3) Make the metal casing of the motor stator, use high-pressure fluid as the driving force on the inner wall of the metal c...

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Abstract

The invention discloses an anticorrosion and anti-degumming screw drill special for a high-sulfur-content oil-gas well and a machining process of the anticorrosion and anti-degumming screw drill, wherein the anticorrosion and anti-degumming screw drill is resistant to oil, acid, sulfur and high-corrosion media such as H2S. The anticorrosion and anti-degumming screw drill mainly comprises a bypassvalve assembly, a hydraulic motor assembly, a cardan shaft assembly and a transmission shaft assembly; the hydraulic motor assembly comprises a motor stator metal shell, a motor rotor, and a motor stator rubber bushing arranged between the motor stator metal shell and the motor rotor; a plurality of 90-degree V-shaped taper holes are formed in the motor stator metal shell, and plugs are arranged in the 90-degree V-shaped taper holes; and synthetic gum of the motor stator rubber bushing is injected into a cavity between the motor stator metal shell and a motor rotor mold core, and part of molten gum is injected into the 90-degree V-shaped taper holes.

Description

technical field [0001] The invention relates to a special anti-corrosion and anti-degumming screw drilling tool for high-sulfur oil and gas wells and a processing technology. Background technique [0002] With the increasing demand for oil and gas resources, oil development gradually shifts to ultra-deep formations, high-sulfur and ultra-high-pressure complex formations. At present, about 20% of oil and gas fields are high-pressure and high-temperature (temperature above 150°C, pressure above 105MPa) oil and gas fields, and most of them contain high concentration CO 2 and H 2 S gas, there are more than 400 sulfur-containing oil and gas fields with proven industrial exploitation value in the world. In the development technology of high-temperature, high-pressure and high-sulfur oil and gas fields, my country has formed a complete technical system from scratch, from existing to excellent, and high The domestic screw drilling tools used in sulfur-containing oil and gas wells h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B4/02C08L71/03C08L27/12C08L11/00C08L23/06C08L33/04C08K13/06C08K7/06C08K5/47C08K3/22C08K3/36C08K5/12C09D1/00C09D5/08C09D7/61
CPCC08K2003/2296C08K2201/004C08K2201/011C08L11/00C08L23/06C08L33/04C08L71/03C08L2201/08C08L2205/035C09D1/00C09D5/08C09D7/61E21B4/02C08L27/12C08K13/06C08K7/06C08K5/47C08K3/22C08K3/36C08K5/12
Inventor 陈梅慧薛彦明陈业宏朱连兰沈郁平陈强刘猛陈飞朱加全
Owner YANCHENG HUAYA GASOLINEEUM MACHINERY MFG
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