Downhole spiral flow shear vibration generator device

A technology of swirling flow generator and shear vibration, which is applied to vibration generating devices, wellbore/well components, earthwork drilling and production, etc., which can solve problems such as excessive rotational torque, too fast rotational speed, and increased operational risks. Achieve the effects of increasing interface cementing strength, improving displacement efficiency, and improving cementing quality

Inactive Publication Date: 2013-06-05
BC P INC CHINA NAT PETROLEUM CORP +1
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AI Technical Summary

Problems solved by technology

[0002] The existing swirl displacement cementing generally adopts the helical flow displacement technology, which mainly has the following aspects: ①The movable casing swirl displacement cementing technology, the principle is to realize the helical flow of the cementing fluid by rotating the casing during the displacement process; the disadvantages : Because the rotation torque is too large and the speed cannot be too fast, the cementing effect is not ideal; if the speed is increased, the operation risk will increase, especially for highly deviated wells and horizontal wells. This technology is even more restricted
②The cementing cyclone is used, which is mainly composed of an oute

Method used

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  • Downhole spiral flow shear vibration generator device
  • Downhole spiral flow shear vibration generator device
  • Downhole spiral flow shear vibration generator device

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Embodiment Construction

[0011] Below in conjunction with accompanying drawing, invention will be further described:

[0012] Depend on Figure 1 to Figure 3 As shown, the downhole swirl shear vibration generator device includes a coupling 1, an outer cylinder 3 and a deflector seat 10 which are screwed in sequence, wherein the upper outer wall of the outer cylinder 3 is fixed by a locking screw 5. Generator 2, the lower part of the inner hole of the outer cylinder 3 is provided with a shear rotor 4, a vibration rotor 7 and a swirl rotor 9 from top to bottom; the swirl generator 2 has evenly distributed spiral blades and is made of plastic material, such as figure 2 As shown, the shearing rotor 4, the vibrating rotor 7 and the swirl rotor 9 are metal structures with helical blades evenly distributed thereon, as image 3 As shown, in this embodiment, the number of helical blades is four. The shearing rotor 4, the vibrating rotor 7 and the swirling rotor 9 are fixed on the shaft 13 through the beari...

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Abstract

The invention relates to a downhole spiral flow shear vibration generator device which is used for spiral flow to replace a well cementation in petroleum drilling engineering and mainly aims to increase spiral flow intensity of cementing fluid and improve cementing effect. The downhole spiral flow shear vibration generator device comprises a coupling, an outer cylinder and a stream-guiding seat which are connected in sequence. A spiral flow generator is fixed on the upper wall of the outer cylinder. A shear rotor, a vibration rotor and a spiral flow rotor are arranged on the lower portion of an inner hole of the outer cylinder in sequence. Due to the fact that the downhole spiral flow shear vibration generator device takes spiral flow, shear and radial vibration pulse technology into account, downhole spiral flow shear vibration is formed, strength property of set cement is improved, and cementing quality is improved.

Description

technical field [0001] The invention relates to a downhole swirl shear vibration generator device used for swirl displacement cementing in petroleum drilling engineering. Background technique [0002] The existing swirl displacement cementing generally adopts the helical flow displacement technology, which mainly has the following aspects: ①The movable casing swirl displacement cementing technology, the principle is to realize the helical flow of the cementing fluid by rotating the casing during the displacement process; the disadvantages : Because the rotating torque is too large and the rotating speed cannot be too fast, the cementing effect is not ideal; if the rotating speed is increased, the operation risk will increase, especially for highly deviated wells and horizontal wells, this technology is restricted even more. ②The cementing cyclone is used, which is mainly composed of an outer pipe, an inner pipe and a spiral flow channel. The flow channel of the cyclone is pr...

Claims

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Application Information

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IPC IPC(8): E21B28/00E21B33/13
Inventor 李国庆郭金平齐玉龙
Owner BC P INC CHINA NAT PETROLEUM CORP
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