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Design method of sound insulation structure and drill collar

A design method and drill collar technology, applied in earthwork drilling, drill pipe, drill pipe, etc., can solve problems such as irreparable erosion damage, drilling safety accidents, economic losses, etc.

Active Publication Date: 2022-05-03
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-term erosion leads to the weakening of drill collar strength, which may cause drilling safety accidents in severe cases
In addition, the cost of sonic instruments while drilling is expensive, because the erosion damage cannot be repaired, resulting in great economic losses

Method used

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  • Design method of sound insulation structure and drill collar
  • Design method of sound insulation structure and drill collar
  • Design method of sound insulation structure and drill collar

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Experimental program
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Embodiment Construction

[0053] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0054] figure 1 It is a flow chart of the design method of the sound insulation structure according to the embodiment of the present disclosure, the sound insulation structure belongs to the drill collar, and the drill collar also includes a drill collar with no groove structure, and the sound insulation structure includes The cavity between the inner and outer walls of a grooved drill collar.

[0055] Such as figure 1 As shown, the design method of the sound insulation structure of the present embodiment comprises:

[0056] S11. Obtain the drill collar wave signal received...

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Abstract

The invention discloses a method for designing a sound-insulating structure and a drill collar. The method includes: acquiring a drill collar wave signal from a sound source with a source distance of TR received by a drill collar with no groove structure; The signal and the source distance determine the number n of cavities to be set between the inner wall and the outer wall of the drill collar with no groove structure; the cavities are arranged in the axial direction and are hollow structures; it is determined according to the number n of cavities The axial length of each of the n cavities; wherein, the distance between every two adjacent cavities is twice the larger axial length of the two adjacent cavities.

Description

technical field [0001] The disclosure relates to the technical field of petroleum well logging, in particular to a design method of a sound insulation structure and a drill collar. Background technique [0002] The drill collar is the lowest part of the drill string and is the main component of the lower drill tool assembly. Its main feature is that the wall thickness is large (generally 38-53mm, equivalent to 4-6 times the wall thickness of the drill pipe), and it has greater gravity and rigidity. The main function of the drill collar is to apply drilling pressure to the drill bit, ensure the necessary strength under compression conditions, reduce the vibration, swing and jump of the drill bit, make the drill bit work stably, and control the well deviation. [0003] When the acoustic logging while drilling tool is working, the sound source excites a guided wave that propagates along the drill collar. If there is no sound insulation treatment, the drill collar wave will do...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/00E21B47/18
CPCE21B17/00E21B47/18
Inventor 孙志峰刘西恩仇傲黄涛陈鸣王晓飞李杰彭凯旋罗博赵龙
Owner CHINA NAT OFFSHORE OIL CORP