Friction device
A friction device and main body technology, applied in wellbore/well components, earth-moving drilling, etc., can solve the problems of high manufacturing cost and complex structure, and achieve the effects of low manufacturing cost, simple structure and easy processing
Inactive Publication Date: 2008-04-09
白霞
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- Application Information
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Problems solved by technology
This friction device has the disadvantages of complex structure and high manufacturing cost
Method used
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Embodiment Construction
[0010] Embodiments of the present invention will be described below in conjunction with accompanying drawing 3 .
[0011] There is a main body 1 and a cantilever slat spring 2, one end of the cantilever slat spring 2 is in a free state, and the other end is distributed and installed on the main body 1. The outer diameter of the main body 1 is smaller than the inner diameter of the casing, and the axis of the cantilever slat spring 2 has an included angle with the axis of the main body 1, so that the diameter of the circle formed by the free ends of several cantilever slat springs 2 is larger than the diameter of the circle formed by the fixed ends The diameter of the circle formed by the free ends of several cantilever slat springs 2 is also greater than the inner diameter of the sleeve, so that the free ends of the cantilever slat springs 2 can be tightly attached to the inner wall of the sleeve, thereby generating friction with the sleeve. The main body 1 is punched with obl...
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The invention relates to a friction device, which comprises a main body and suspension arm leaf springs. One end of the leaf spring is in a free state, while the other end of the leaf spring is arranged on the main body. The outer diameter of the main body is smaller than the inner diameter of a bushing, and an angle forms between an axial line of the suspension arm leaf spring and an axial line of the main body, so as to lead the free ends of a plurality of suspension arm leaf springs to be connected into a circle with a diameter which is larger than that of a circle connected by the fixed ends; and the diameter of the circle formed by the free ends of a plurality of suspension arm leaf springs is also larger than the inner diameter of the bushing; and the free ends of the suspension arm leaf springs are led to cling to the bushing inner wall so as to generate a friction force. Inclined holes of the same quantity with the suspension arm leaf springs are cut on the maim body, and an annular groove is arranged on an outer side of the main body and the suspension arm leaf springs are inserted into the inclined holes on the main body. And the suspension arm leaf springs are welded on the main body through the annular groove of the main body. The invention has simple structure, and the manufacturing is easy and the manufacturing cost is low.
Description
1. Technical field [0001] The invention is a device on a downhole tool used for oil recovery in an oil field, and is a friction device. 2. Background technology [0002] In some oil fields, friction devices are installed on the downhole tools used for oil production, such as Y211, Y221 and other packers. up and down. The function of the friction device is to generate axial force or radial force, temporarily fix some parts on the downhole tool, and make some parts on the downhole tool move relative to each other when the ground rotates or raises and lowers the tubing, so that the tool is in the working status. The existing friction device is shown in Figure 1. This friction device has the disadvantages of complicated structure and high manufacturing cost. 3. Contents of the invention [0003] The object of the present invention is to provide a friction device with simple structure and low manufacturing cost. [0004] The purpose of the present invention is achieved lik...
Claims
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Inventor 孙瑞霞于同印李铭樊风翔
Owner 白霞