Method for locating underground non-cable test system

A test system and positioning method technology, applied in the field of positioning, can solve problems such as unusable, difficult positioning of the downhole cableless test system, complex borehole trajectory, etc., and achieve the effect of simple operation, low hardware cost and accurate calculation method

Inactive Publication Date: 2011-09-14
SHANGHAI UNIV
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Problems solved by technology

[0003] Because the cableless test system cannot use the cable to measure its shrinkage length to locate the well depth, especially in horizontal wells or inclined wells, due to the complexity of the wellbore trajectory, it is also impossible to use GPS, ultrasonic and other wireless positioning technologies, which are very difficult for the downhole cableless test. System positioning creates difficulties

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  • Method for locating underground non-cable test system
  • Method for locating underground non-cable test system
  • Method for locating underground non-cable test system

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Embodiment Construction

[0028] The following combination Figure 1~Figure 7 A preferred embodiment of the present invention is described in detail in order to better illustrate the method features and functions of the present invention.

[0029] figure 1 It is a schematic diagram of the downhole cableless test system being lifted in a horizontal well. The downhole cableless test system involved in the figure is a general term for various downhole test devices, not a specific one. The initial position of its movement starts from the end of the well bottom, and its movement The power comes from the hook and wire rope traction for lifting the drill pipe, and the hoisting speed of the hook is determined by the rotation speed of the wire rope drum on the ground. The figure shows a horizontal well as an example, the vertical drilling distance H , deflection radius R , Horizontal drilling distance L Wait.

[0030] figure 2 It is a flow chart of the positioning steps of the downhole cableless testing ...

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Abstract

The invention provides a method for locating an underground non-cable test system. A pressure sensor and a rotation speed sensor are arranged on a load hydraulic pool output pipeline and a steel wire roller in a well drilling system to acquire data information of large hook load and roller rotation speed, thus positions, at which the underground non-cable test system is arranged at any times, areindirectly determined. The method comprises the following operating steps of: a, installing the pressure sensor to test large hook load time sequence data; b, installing the rotation speed sensor to test the roller rotation speed time sequence data; c, judging the effective lifting time quantum of the underground non-cable test system; d, judging the effective lifting distance of the underground non-cable test system; and e, locating the underground non-cable test system. The method for locating the underground non-cable test system, disclosed by the invention, has low hardware cost and simpleness, convenience and fastness for operation, the work program of a current drilling system does not need to break, and the calculating method is accurate and reliable.

Description

technical field [0001] The invention relates to a positioning method, in particular to a positioning method for an underground cableless testing system. Background technique [0002] Well logging is an important task in the fields of petroleum, coal mines, and water conservancy. It mainly uses various downhole testing systems to detect working parameters (such as well diameter, well pressure, well temperature, and oil-gas ratio) at different positions in the well. , in order to scientifically evaluate the well after drilling. At present, downhole testing systems are mainly divided into two categories: cabled testing systems and cableless testing systems. The power supply, signal transmission, signal control and positioning of the underground cable testing system all depend on the cable, the operation process is complicated and the construction cost is high. The downhole cableless testing system can perform logging when the drill pipe is lifted downhole. It is easy to opera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B47/09
Inventor 刘树林唐友福刘吉成翟宇毅周晓君姜锐红刘颖慧刘锐
Owner SHANGHAI UNIV
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