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Corrosion-resistant oil casing coupling made of pure steel

A technology of oil casing and pure steel, applied in casing, drill pipe, drilling equipment, etc., can solve the problem of easy-to-corrosion special oil pipe and other problems, and achieve the effect of improving corrosion resistance, improving service life, and improving the chemical composition of materials

Inactive Publication Date: 2015-12-09
TIANJIN DEHUA GASOLINEEUM EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an anti-corrosion oil casing made of pure steel to solve the defect in the prior art that it is easy to corrode the special oil pipe when exploiting oil and gas resources containing hydrogen sulfide

Method used

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  • Corrosion-resistant oil casing coupling made of pure steel
  • Corrosion-resistant oil casing coupling made of pure steel
  • Corrosion-resistant oil casing coupling made of pure steel

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Embodiment Construction

[0013] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0014] It should be noted that the "connection" mentioned in this application and the words used to express "connection", such as "connected", "connected", etc., include not only a direct connection between a certain component and another component, but also a certain One part is connected to another part through other parts.

[0015] Such as figure 1 , figure 2 , image 3 As shown, the present invention provides a corrosion-resistant oil casing coupling made of pure steel, which is used for the connection of the oil casing body 1. Both ends of the coupling 3 are provided with internal threads 4, and respectively Connect an oil casing pipe body 1, the end of the oil casing pipe b...

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Abstract

The invention provides a corrosion-resistant oil casing coupling made of pure steel. The corrosion-resistant oil casing coupling is used for connecting oil casing bodies (1). The two ends of the coupling (3) are provided with internal threads (4) and are connected with two oil casing bodies (1) respectively, the ends of the oil casing bodies (1) are provided with external threads (2), the external threads (2) and the internal threads (4) are matched to be used, and the oil casing bodies (1) and the coupling (3) are made of pure steel. Compared with the prior art, due to the adoption of a unique pure steel production technology, material chemical components are improved, the corrosion resistance is improved, the oil casing coupling adapts to the oil and gas well conditions in poor environmental conditions better, and the service lives of oil casings are prolonged.

Description

technical field [0001] The invention belongs to the technical field of drilling equipment for oil exploitation, and relates to an oil casing threaded connection technology and an anti-corrosion technology of the drilling equipment, in particular to a corrosion-resistant oil casing coupling made of pure steel. Background technique [0002] The API standard oil casing threaded joint is the most commonly used oil casing joint in my country, and it is also the leading product of various oil casing manufacturers in my country. This product has mature technology and is easy to process. However, the oil casing still has some inherent defects in its structure, such as low make-up efficiency, which limits the use of API oil casing. [0003] According to statistics, about 1 / 3 of the world's oil and gas fields contain hydrogen sulfide gas. Many oilfields in China, such as Sichuan, Changqing, North China, Xinjiang, Jianghan, Daqing and other oilfields contain hydrogen sulfide in the oi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/02
Inventor 武磊张国辉
Owner TIANJIN DEHUA GASOLINEEUM EQUIP MFG