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Arranging method and device for centralizer for drill rod

A layout method and centralizer technology, applied in the direction of drill pipe, drill pipe, drilling equipment, etc., can solve the problem of large deviation between calculation results and actual

Active Publication Date: 2014-06-25
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively simple factors considered by the differential method, the calculation result and the actual deviation are relatively large
Therefore, there is no reasonable method for arranging drill pipe centralizers at present.

Method used

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  • Arranging method and device for centralizer for drill rod
  • Arranging method and device for centralizer for drill rod
  • Arranging method and device for centralizer for drill rod

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Embodiment Construction

[0066] The technical scheme of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art Modifications to various equivalent forms of the present invention fall within the scope defined by the appended claims of the present application.

[0067] Such as figure 2 Shown is a flow chart of a method for arranging a centralizer for a drill pipe provided by an embodiment of the present invention, and the method for arranging a centralizer for a drill pipe includes the following steps:

[0068] S1: Taking the three-dimensional wellbore trajectory data points as nodes, setting the drill pipe section between any two adjacent nodes as a drill pipe unit;

[0069] S2: Obtain the basic parameters c...

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Abstract

The invention discloses an arranging method for a centralizer for a drill rod. The method comprises the steps that three-dimensional well track data points are arranged to be joints, and a drill rod section between any two adjacent joints is set to be a drill rod unit; relevant basic parameters are obtained; according to the obtained basic parameters, a finite difference method is used for determining the lateral force on the drill rod units; according to the lateral force of the drill rod units, the positive pressure on the drill rod units is determined; according to the positive pressure on the drill rod units, the equal-abrasion principle is used, the number of centralizers is determined, and the centralizers with the determined number on the drill rod units are located; and finally according to the bent beam theory, the space distance between two adjacent centralizers is checked. According to the arranging method for the centralizer for the drill rod, an arranging device for the centralizer for the drill rod is combined, the centralizers for the drill rod on the drill rod are reasonably arranged, and accordingly anti-eccentric-grinding performance of the drill rod is achieved.

Description

technical field [0001] The invention relates to an anti-eccentric wear design of a drill pipe in the field of drilling and completion, in particular to a method and a device for arranging a centralizer for a drill pipe. Background technique [0002] In the field of oil drilling and completion, it is generally necessary to use a drill string for drilling in the early stage. Such as figure 1 As shown, the drill string 1 is set in the casing 2 . The drill string 1 mainly includes a drill bit 11 and a drill rod 12 . The drill pipe 12 is formed by connecting a plurality of pipe sections, and a collar 13 is provided at the connection position to form a whole drill pipe 12 . Usually, a centralizer 14 is sheathed on the collar 13 . [0003] When the drill pipe 12 is rotary drilling, especially when drilling a directional well, the trajectory of the wellbore is three-dimensionally curved, and the force on the drill pipe 12 is also three-dimensional in space. The three-dimensiona...

Claims

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Application Information

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IPC IPC(8): E21B17/10E21B47/00
Inventor 马振齐海鹰曹传文彭松良曲绍刚张成博刘洪芹宋阳冯伟
Owner PETROCHINA CO LTD
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