A special anti-corrosion and anti-degumming screw drilling tool for high-sulfur oil and gas wells and its processing technology

A technology for screw drilling tools and oil and gas wells, which is applied in anti-corrosion coatings, driving devices for drilling in boreholes, and earth square drilling, etc., and can solve problems such as high cost, corrosion, and reduced toughness of metal materials

Active Publication Date: 2021-05-04
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 is gradually shifting 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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  • A special anti-corrosion and anti-degumming screw drilling tool for high-sulfur oil and gas wells and its processing technology
  • A special anti-corrosion and anti-degumming screw drilling tool for high-sulfur oil and gas wells and its processing technology

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Embodiment 1

[0032] 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:

[0033] (1) Making motor stator rubber bushing:

[0034] 15% neoprene rubber, 20% acrylic ester, 3% fluorine rubber 246, 20% chlorohydrin rubber, 10% 6μm modified ultrafine carbon fiber powder, the average length of the fiber is 10mm, and 15% polymer poly Ethylene is uniformly mixed and co-refined;

[0035] (2), add 3% dibenzothiazole disulfide, 2% zinc oxide activator, 2% dibutyl phthalate softening agent in the sizing material that mixing co-refining step (1) obtains, 3% % anti-aging agent A, adding 3% nano-silica reinforcing agent, 2% cobalt salt coagulant, and 2% triazine adhesive in batches to make synthetic rubber for motor stator rubber bushing;

[0036] (3) To make the motor stator metal shell, the inner wall of the motor stator metal shell is driven by high-pressure fluid, and the quartz s...

Embodiment 2

[0043] 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:

[0044] (1) Making motor stator rubber bushing:

[0045] 20% neoprene rubber, 10% acrylic ester, 5% fluorine rubber 246, 10% chlorohydrin rubber, 12% 5μm modified ultrafine carbon fiber powder, the average fiber length is 13mm, 20% polymer poly Ethylene is uniformly mixed and co-refined;

[0046] (2), add 4% dibenzothiazole disulfide, 3% zinc oxide activator, 3% dibutyl phthalate softening agent, 4% in the sizing material that mixing co-refining step (1) obtains, % anti-aging agent A, adding 5% nano-silica reinforcing agent, 3% cobalt salt coagulant, and 1% triazine adhesive in batches to make synthetic rubber for motor stator rubber bushing;

[0047] (3) To make the motor stator metal shell, the inner wall of the motor stator metal shell is driven by high-pressure fluid, and the quartz sand is use...

Embodiment 3

[0054] 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:

[0055] (1) Making motor stator rubber bushing:

[0056] 218% neoprene rubber, 18% acrylic ester, 4% fluorine rubber 246, 16% chlorohydrin rubber, 11% 4μm modified ultrafine carbon fiber powder, the average length of the fiber is 15mm, and 16% polymer poly Ethylene is uniformly mixed and co-refined;

[0057] (2), add 3% dibenzothiazole disulfide, 2% zinc oxide activator, 2% dibutyl phthalate softening agent in the sizing material that mixing co-refining step (1) obtains, 3% % anti-aging agent A, add 4% nano-silica reinforcing agent in batches, 1% cobalt salt coagulant, and 1% triazine adhesive to make motor stator rubber bushing synthetic rubber;

[0058] (3) To make the motor stator metal shell, the inner wall of the motor stator metal shell is driven by high-pressure fluid, and the quartz sand is...

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Abstract

The invention discloses an oil-resistant, acid-resistant, sulfur-resistant, H-resistant 2 A special anti-corrosion and anti-degumming screw drilling tool and processing technology for high-sulfur oil and gas wells in highly corrosive media such as S. Including: bypass valve assembly, hydraulic motor assembly, cardan shaft assembly and transmission shaft assembly, the hydraulic motor assembly includes: motor stator metal casing, motor rotor and the motor stator metal casing and motor rotor The rubber bushing of the motor stator between them; several 90° inverted splayed tapered holes are arranged on the metal casing of the motor stator, and plugs are arranged in the 90° inverted splayed tapered holes, and the motor stator The synthetic glue of the rubber bushing is injected into the cavity between the metal casing of the motor stator and the core of the motor rotor, and part of the synthetic glue is injected into the 90° inverted figure-eight tapered hole.

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 is gradually shifting 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 we...

Claims

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Application Information

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Patent Type & Authority Patents(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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