Experimental Study on Friction and Wear between Drill Collar and Casing

Casing wear is one of the key issues in the development of oil and gas fields and in the process of drilling operations. In this study, the relationship between hardness and wear resistance of drill collar and casing was studied; thereby the wear conditions between the two materials were improved. Chemical analysis, optical microscopy, hardness test and friction wear test were conducted to study the effects of heat treatment on hardness of the drill collar 4145H and the casing 30Mn5V, and discuss the relationship between hardness and wear resistance of them. The results showed that the materials of drill collar and casing after different heat treatment had varying degrees of wear, both of the respective wear amounts were gradually increasing with the increase of hardness of them, the wear extent of casing material was greater than that of drill collar material. The hardness of casing material was the lowest and its wear resistance was the best when quenching at 880°C and tempering at 630°C. And when quenching at 900°C and tempering at 690°C, the hardness of drill collar material was the lowest and its wear resistance was the best. Therefore, the hardness of drill collar and casing can be improved by changing the heat treatment process to improve the wear resistance, thereby reducing the wear conditions between them.

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Aspects of multi-well deconvolution technique application on development facilities

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/937/4/042047 ◽

2021 ◽

Vol 937 (4) ◽

pp. 042047

Author(s):

L F Yusupova ◽

G R Izmaylova ◽

K F Gabdrahmanova ◽

L Z Samigullina

Keyword(s):

Oil And Gas ◽

Operation Mode ◽

Innovative Technology ◽

Oil And Gas Fields ◽

Deconvolution Technique ◽

The Russian Federation ◽

Processing Techniques ◽

Gas Fields ◽

Oil And Gas Companies ◽

The Relationship

Abstract Many ways of information about the downhole pressures of existing wells collecting have long been outdated. With the improvement of processing techniques, the need to modernize the ways of information about oil and gas fields obtaining becomes more obvious. Many oil and gas industries are developing in this direction. The article discusses an innovative technology for downhole characteristics monitoring, which is called multi-well deconvolution. It is based on the creation of a system of equations that includes the relationship between the downhole pressure and the flow rate graph. This technique has been widely used among foreign research groups, but it was not until recently that it started to be applied in the Russian Federation. The first oil and gas companies to be interested in the multi-well deconvolution technology were Gazpromneft and Rosneft, which managed to conduct some studies using thу technology and confirmed its profitability. This technology makes it possible to assess the well operation mode and predict its further operation, which in turn makes it possible to optimize the development and operation modes.

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Precision Straightening Method of Thin-Walled Seamless Steel Pipes

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.819.65 ◽

2013 ◽

Vol 819 ◽

pp. 65-70 ◽

Cited By ~ 1

Author(s):

Lian Jin Li ◽

Jia Yang

Keyword(s):

Oil And Gas ◽

Steel Pipes ◽

Performance Quality ◽

Oil And Gas Fields ◽

Thin Walled ◽

Gas Fields ◽

Skew Rolling ◽

Relationship Of ◽

The Relationship ◽

Seamless Steel

With the highest product performance, quality and reliability requirements, oil casing is the most demanding service conditions in the oil and gas fields. However, when solving with thin-walled seamless steel pipes by the existing straightening theory, the cross section distortion phenomenon shall not be considered, and when the proportion of diameter to wall thickness increases, an ideal straightening effect can't be obtained. With the elastic-plastic bending straightening theory, this paper analyzes straightening process of thin-walled seamless steel pipes, studies the relationship of the flattening rate, deflection and straightening force in thin-walled pipes straightening, deduces the best reduction calculation method in the practical six roller skew rolling straightening machine, and in the meantime, results of several steel pipes flattening rate are compared.

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