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Protector for preventing rod member from falling and one-way locking method

A protection device and component technology, applied in earthwork drilling, wellbore/well components, measurement, etc., can solve problems such as delaying normal production, adding a tripping operation, and damaging instruments

Inactive Publication Date: 2006-06-28
CNPC DRILLING RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Such operation technology has the following problems: when the instrument 22 has reached the wellhead and the drawworks is still running fast, it is easy to break the wire rope, causing the instrument to fall from the wellhead to the bottom of the well
[0006] (1) Forced to trip out the drill ahead of time to take out the instrument, thereby adding a tripping operation, resulting in several hours of lost working hours and economic losses of up to tens of thousands of yuan;
[0007] (2) The falling of the instrument out of control will often damage the instrument, not only causing economic losses of tens of thousands of yuan, but also delaying normal production

Method used

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  • Protector for preventing rod member from falling and one-way locking method
  • Protector for preventing rod member from falling and one-way locking method
  • Protector for preventing rod member from falling and one-way locking method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The invention discloses a one-way locking method of a rod-shaped component and a protection device for preventing the rod-shaped component from falling into a well out of control. The method and the device can be used in the measurement of oil and gas drilling process, geological exploration, geothermal and other underground engineering drilling processes Operation can prevent the instrument from falling into the well, avoid accidents and economic losses.

[0030] In this embodiment, as shown in Figure 2a, using this device, the measuring rod-shaped member 2 can be lowered down along the tapered channel 1 with a large upper part and a smaller one at the lower part, and at least More than two rolling elements 3, the rolling elements 3 keep a tendency to move downward in the tapered channel; The member rolls down along the tapered wall surface of the tapered channel 1, and when the distance between the rolling elements 3 is smaller than the minimum outer contour of the ro...

Embodiment 2

[0044] In this embodiment, it can be as Figure 7 As shown, the conical passage 1 provided by the protection device can be provided with two conical surfaces, and the conical surfaces are two mutually symmetrical inclined surfaces, and the rolling element 3 arranged in the conical passage 1 in the protection device can be a cylinder, The number of cylindrical rolling elements 3 can be two, and the two cylinders are symmetrically arranged on the two slopes forming the tapered channel 1, and the two cylinders 3 are provided with a groove at the corresponding position, and the two cylinders are tangent to each other. At the same time, the two grooves can form a corresponding through hole, which is much smaller than the measuring rod but larger than the diameter of the steel wire, without affecting the steel wire going into the well. When using the present invention, the rod-shaped measuring member is lowered into the well first, and then placed into the two cylinders. Since the g...

Embodiment 3

[0048] In this embodiment, the conical channel 1 provided by the protection device can be provided with three conical surfaces, such as Figure 8a and Figure 8b As shown, the rolling elements in the conical channel in the protection device can be spherical or cylindrical. There are three rolling elements 3 respectively arranged on each conical surface of the conical channel. When using the present invention, when the rod-shaped measuring member is pulled up by the pull-up device 4, the rolling elements 3 are positioned on the protective device. In the upper half section of the upper half section, the diameter of the inscribed circle of the figure formed by the three cylinders is greater than or equal to the diameter of the rod-shaped member 2, and the friction force between the measuring member and the cylinder can ensure that the measuring instrument is in the positive direction. Pass smoothly while exercising without getting stuck.

[0049] When an unexpected failure occu...

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Abstract

The single-way locking method of rod member is that in the conic passage with large upper part and small lower part for the measuring rod member to be laid down, there are at least two rolling bodies with trend of downward moving in the conic passage. When the rod member falls in the dead weight, the rolling bodies will roll downwards together with the rod member, and when the distance between rolling bodies is smaller than the smallest size of the rod member, the rod member will be clamped to stop falling owing to the friction between the rolling bodies and the rod member. The protecting method and device may be used in the job of drilling oil and gas well as well as other similar drilling jobs.

Description

technical field [0001] The invention relates to a protection device and its one-way locking method, especially a protection device for preventing a rod-shaped measuring instrument from falling out of control at the wellhead and a one-way locking method for a rod-shaped member. The protection device and method can not only be used for In the process of oil and gas drilling, it can also be used for geological exploration, geothermal and other underground engineering drilling processes, and it is of value in preventing instruments from falling into wells, avoiding accidents and economic losses. Background of the invention [0002] In the drilling engineering of oil and gas exploration and development, it is necessary to drill vertical wells and directional wells. In order to ensure the quality of the wellbore, it is stipulated that the inclination angle, azimuth angle and tool face angle should be measured frequently during the drilling process. The single-point inclinometer i...

Claims

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Application Information

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IPC IPC(8): E21B47/01E21B47/017
Inventor 苏义脑张润香
Owner CNPC DRILLING RES INST
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