Experiment device and method for measuring large displacement well drill column clamping point

A technology for extended-reach wells and experimental devices, which is applied in the directions of measurement, earthwork drilling, boreholes/well components, etc. It can solve the problems of lack of experimental devices and methods for measuring stuck points of drill strings in extended-reach wells, and achieves simple structure and easy installation. And easy to operate, improve the effect of test accuracy

Inactive Publication Date: 2014-02-19
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide an extended-reach well drill string sticking point measurement experimental device an

Method used

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  • Experiment device and method for measuring large displacement well drill column clamping point
  • Experiment device and method for measuring large displacement well drill column clamping point
  • Experiment device and method for measuring large displacement well drill column clamping point

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Example Embodiment

[0029] The present invention will be further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0030] Such as figure 1 As shown, an extended reach well drill string stuck point measurement experiment device provided by an embodiment of the present invention includes a simulated wellbore casing section 4, a simulated wellbore open hole section 7, a simulated drill string 6 and a measuring instrument 10, wherein: The simulated wellbore includes a straight section, a curved section and a horizontal section. The straight section and the curved section are casing sections, and the horizontal section is an open-hole section of the simulated formation, and the two are connected;)

[0031] The simulated wellbore casing section 4 and the simulated wellbore open hole section 7 are connected to form a through passage; the bit end of the simulated drill string 6 operably passes through the passage to be fixed at the end of the si...

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Abstract

The invention discloses an experiment device and method for measuring a large displacement well drill column clamping point. The experiment device comprises a simulation shaft casing pipe section, a simulation shaft naked eye section, a simulation drill column and a measuring instrument. The experiment device is simple in structure and convenient to install and operate. The effect on a correction factor eta of the clamping point position from a water droop ratio lambda is analyzed through a mathematical statistics method, a relation curve, conforming to eta=f (lambda), between eta and lambda is established, the situation that in the process of drilling a large displacement well, the stress state of a drill is complex, and a drill column connector and the well track change affect the measuring errors is corrected as much as possible, the clamping point position is worked out based on the shearing Hooke law, and accordingly the testing precision is improved.

Description

technical field [0001] The invention belongs to the technical field of underground resource drilling and production engineering, and in particular relates to an experimental device and method for measuring sticking points of drill strings in extended-reach wells. Background technique [0002] Extended-reach wells with a water-to-slip ratio of not less than 2 are widely used in offshore oilfield exploitation and offshore oil onshore recovery, and have become an effective means to increase oil and gas recovery and reduce the cost of "ton of oil" production. During extended reach drilling, pipe sticking is one of the drilling accidents with the highest frequency, the longest processing time and the largest economic loss. [0003] At present, the methods for measuring the sticking point of the drill string include the theoretical calculation method of lifting and the measurement method of the special card measuring instrument. Among them, the pulling theory calculation method i...

Claims

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Application Information

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IPC IPC(8): E21B47/00
Inventor 周劲辉高德利房军
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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