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Hollow steel continuous pumping rod resistant to H2S corrosion

A technology of sucker rod and hollow steel, which is applied in the direction of drill pipe, drilling equipment, earthwork drilling and production, etc., can solve the problem of oil field consumption such as alarming, achieve good H2S stress corrosion cracking resistance, high safety and reliability, and convenient operation Effect

Inactive Publication Date: 2016-08-24
BAOJI PETROLEUM STEEL PIPE
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Due to the staggering consumption caused by corrosion and wear to the oil field, a new sucker rod is urgently needed to solve the above-mentioned problems

Method used

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  • Hollow steel continuous pumping rod resistant to H2S corrosion
  • Hollow steel continuous pumping rod resistant to H2S corrosion

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Embodiment Construction

[0014] an anti-H 2 The corroded hollow coiled sucker rod 1 is the whole coiled tubing. The continuous sucker rod 1 is a whole coiled tubing that can be wound on the reel 2 and has no coupling. The length of the entire coiled tubing is ≥ 61m, the diameter is 25.4-88.9mm, the yield strength is ≥ 621MPa, the tensile strength is ≥ 689Mpa, and the corrosion resistance to hydrogen sulfide: the sulfur resistance performance is in accordance with the NACE0177-2005 standard and the A method is used at 85 % above the nominal yield strength of the sample under the load after 720 hours without cracking.

[0015] The manufacturing process of the continuous sucker rod of the present invention is as follows: melting and forging into slabs according to the chemical composition in Table 1; using TMCP process, the slabs with the above components are subjected to rough rolling and finish rolling at a certain temperature to make steel coils ;The steel coil is slit into the required steel strip,...

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Abstract

The invention discloses a hollow steel continuous pumping rod resistant to H2S corrosion. The hollow steel continuous pumping rod resistant to H2S corrosion comprises, by mass, 0.03%-0.08% of C, 0-0.10% of Si, 0.40%-0.7% of Mn, 0-0.01% of P, 0-0.003% of S, 0.4%-0.9% of Cr, 0.2%-0.5% of Mo, 0.1%-0.4% of Cu, 0-0.05% of V, 0-0.04% of Ti and 0-0.04% of Nb. The continuous pumping rod is a complete coiled tubing, the length of the continuous pumping rod is equal to or larger than 61 mm, the diameter of the continuous pumping rod is 25.4-88.9 mm, the yield strength of the continuous pumping rod is equal to or larger than 621 MPa, the tensile strength of the continuous pumping rod is equal to or larger than 689 MPa, and the continuous pumping rod has good H2S corrosion resistance. The length of a single hollow steel continuous pumping rod can reach several kilometers to the greatest extent, the hollow steel continuous pumping rod can be directly guided into a well, the cost is low, working is convenient, and the requirement for exploration and exploitation of corrosive oil and gas fields is met.

Description

Technical field: [0001] The invention belongs to the technical field of oil recovery in oilfields, and in particular relates to an anti-H 2 Corroded hollow steel continuous sucker rod. Background technique: [0002] The sucker rod is an important part of the rod pump pumping device. It connects the polished rod on the top to connect with the pumping unit, and connects the piston of the oil well pump on the bottom to drive the oil well pump to do suction work. During oil extraction, the sucker rod is always at H 2 S, CO 2 In an environment that is easily corroded under the combined action of dissolved oxygen and conductive drilling fluid, it not only bears the dynamic loads of tension, compression, bending and torsion, but also is affected by fluid flow and abrasive wear, making oil pumping Rod corrosion intensifies and is prone to corrosion fatigue, erosion corrosion, etc. Now, the development of oilfields has entered the middle and late stages. With the increase of wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/18C22C38/12C22C38/16C22C38/14E21B17/20
CPCC22C38/04C22C38/02C22C38/12C22C38/14C22C38/16C22C38/18E21B17/20
Inventor 毕宗岳王维亮余晗张晓峰鲜林云汪海涛李鸿斌晁利宁
Owner BAOJI PETROLEUM STEEL PIPE
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