A mechanical analysis method for coiled tubing running into horizontal wells

An analysis method and horizontal well technology, applied in instrumentation, design optimization/simulation, calculation, etc.

Active Publication Date: 2022-03-01
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that whether the buckling behavior will occur in the process of running the coiled tubing into the horizontal well cannot be accurately judged, to provide a mechanical analysis method for running the coiled tubing into the horizontal well, and to prepare and judge whether buckling occurs before the coiled tubing is run into the horizontal well Behavior to ensure that the coiled tubing can be successfully run into the horizontal well

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  • A mechanical analysis method for coiled tubing running into horizontal wells
  • A mechanical analysis method for coiled tubing running into horizontal wells
  • A mechanical analysis method for coiled tubing running into horizontal wells

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Embodiment Construction

[0067] Below in conjunction with accompanying drawing, the present invention is described in detail.

[0068] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0069] The final spatial trajectory formed by drilling is called the wellbore trajectory, which actually refers to the axis of the wellbore. The actual drilling trajectory is three-dimensional, which is a complex three-dimensional space curve. figure 1 is a schematic diagram of the spatial geometric relationship of the wellbore trajectory, see figure 1 As shown, the well depth, inclination angle α and azimuth angle can be used Describe the well trajectory.

[0070] for figure 1 The natural c...

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Abstract

The invention discloses a mechanical analysis method for running a coiled tubing into a horizontal well. The synthetic external force per unit length of tubing, the concentrated internal moment of coiled tubing and the distributed external moment of coiled tubing per unit length are brought into the equilibrium equation of coiled tubing microelements to obtain the mechanical model of axial load of horizontal well coiled tubing; according to the buckling critical load of coiled tubing and The result of solving the axial load mechanical model of coiled tubing in horizontal wells is used to determine whether buckling behavior will occur when coiled tubing is run into a horizontal well. The invention considers the borehole trajectory when establishing the axial load mechanical model of the coiled tubing in the horizontal well, and judges whether the buckling behavior occurs when the coiled tubing runs into the horizontal well more accurately, thereby ensuring that the coiled tubing can be successfully run into the horizontal well.

Description

technical field [0001] The invention relates to the technical field of coiled tubing operations, in particular to a mechanical analysis method for running a coiled tubing into a horizontal well. Background technique [0002] Coiled tubing has the characteristics of low operating cost, high efficiency, convenient operation, and wide range. It is known as the "universal operating machine" in the petroleum industry. The application of coiled tubing in workover operations can often reduce costs, and the use of coiled tubing can reduce the number of operating equipment, especially on offshore platforms, which can often save the narrow operating area of ​​the platform and improve the operation of operating equipment. transfer efficiency. Coiled tubing is composed of flexible tubing strings welded one by one. Compared with conventional tubing strings, its rigidity is smaller. Buckling behavior is prone to occur during the process of coiled tubing running into the bottom of a horiz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/28G06F113/08G06F119/14
CPCG06F30/23G06F30/28G06F2113/08G06F2119/14
Inventor 毛良杰付燈煌王国荣聂荣国杨雁
Owner SOUTHWEST PETROLEUM UNIV
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