CO2/H2S and sulfate reducing bacteria corrosion resistant seamless pipeline and manufacturing method thereof
A technology of seamless pipes and sulfates, which is applied in the direction of pipes/pipe joints/fittings, manufacturing tools, drilling pipes, etc., can solve problems such as inadequacies, and achieve excellent corrosion performance and excellent corrosion performance
Active Publication Date: 2018-01-23
CHINA UNIV OF PETROLEUM (BEIJING) +2
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Problems solved by technology
but not resistant to CO 2 -H 2 Corrosion performance of S-SRB coexistence environment
Method used
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[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0046] The composition list of embodiment is shown in table 1
[0047] Table 1 embodiment composition (wt / %)
[0048]
[0049] A line pipe with a specification of 219*14.5 was made by using the alloy with the composition in Table 1. The specific process is as follows:
[0050] 1. Cast the alloy with the above composition into an ingot, and forge the ingot into a round tube billet of φ300mm;
[0051] 2. After the tube billet is heated to 1250°C for 3 hours, it is made into a blank tube through the general hot-rolled line pipe produ...
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Abstract
The invention provides a seamless pipeline with excellent CO2-H2S-SRB corrosion resistant performance. The pipeline is prepared from the following components according to mass percent: 0.03% to 0.10%of C, 0.1% to 0.5% of Si, 0.10% to 1.50% of Mn, less than 0.02% of P, less than 0.005% of S, 1.0% to 4.0% of Cr, 0.1% to 1.5% of Ni, 0.15% to 2.0% of Cu, 0.05% to 0.4% of Mo, 0.01% to 0.05% of Ti, 0.05% to 0.1% of RE and the balance of Fe. A manufacturing method of the pipeline comprises the steps of smelting and rolling into a pipe blank, punching and rolling into a pipe, then heating to 920 to 1000 DEG C by a prepared steel tube, insulating for 0.3 to 1 h according to the wall thickness of the steel pipe, and then performing quick cooling and tempering heat treatment. The seamless pipeline can be used in the fields of oil and gas fluid conveying and the like.
Description
technical field [0001] The invention relates to a seamless line pipe used for transporting oil and gas in an oil and gas field. In particular, a suitable carbon dioxide (CO 2 ), hydrogen sulfide (H 2 S) and sulfate-reducing bacteria (SRB) environment, with excellent uniform corrosion resistance, especially seamless line pipe and manufacturing method with excellent pitting corrosion resistance. Background technique [0002] With the gradual deepening of oil and gas field exploitation and increasingly harsh working conditions, the produced oil and gas are often accompanied by CO 2 and H 2 S corrosive gas. Gathering line pipes are mainly used to connect pipelines between oil and gas wells and comprehensive oil and gas treatment devices, and the oil and gas transported are all oil and gas that have not been pretreated by dehydration, desalination and desulfurization, so the service conditions of gathering and transportation line pipes are relatively harsh. In recent years, ...
Claims
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IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/44C22C38/50C21D1/18C21D8/10
CPCC21D9/14C21D6/002C21D6/005C21D6/008C21D8/105C21D9/085C22C38/002C22C38/005C22C38/02C22C38/04C22C38/42C22C38/44C22C38/50E21B17/00F16L58/00
Inventor 于浩波齐亚猛陈长风于延钊匡园姜瑞景贾小兰郭彦英张俊莹于连武
Owner CHINA UNIV OF PETROLEUM (BEIJING)