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Under balance drilling revolution control device

A rotary control device and underbalanced drilling technology, applied in earthwork drilling, wellbore/well components, sealing/isolation, etc., can solve the problem of low pressure level of rotary control head, difficult maintenance of rotary control head, expensive maintenance, etc. to avoid blowout accidents, shorten the exploration period, and improve exploration efficiency

Active Publication Date: 2012-07-18
JIANGSU WEIDONG MACHINERY
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a rotary control device for underbalanced drilling, on the one hand to solve the problem of low pressure level and unsoundness of the rotary control head in our country, and on the other hand to solve the maintenance difficulty and expensive maintenance of the WILLLIAMS7100EP rotary control head. Issues such as imports are needed to realize the development of the underbalanced drilling market at a lower cost

Method used

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  • Under balance drilling revolution control device
  • Under balance drilling revolution control device
  • Under balance drilling revolution control device

Examples

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Embodiment Construction

[0038] Such as figure 1 , 2 As shown, the rotation control device is composed of a bearing assembly 1, a clamp 2, a housing 3, and a hydraulic cylinder 4. Two sets of hydraulic cylinders 4 are installed on the housing 3, and the clamps 2 are symmetrically embedded in the housing. At the upper end of the body 3, the bearing assembly 1 is installed on the housing 3 through the sealing triangular pad 6.

[0039] In the underbalanced drilling rotation control device of the present invention, the sealing triangular pad such as Figure 5 As shown, the inner circle of the sealing triangular pad 6 is a conical surface, the angle is a=30 degrees, and the sealing triangular pad 6 is tightly embedded in the fixing groove of the housing 3 .

[0040] In the underbalanced drilling rotation control device of the present invention, the hoop such as Image 6 , 7 As shown, the inner circle of the clamp 2 is a circular table surface, and there is a conical surface between the two circular ta...

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Abstract

The present invention discloses an imbalanced drilling rotation control device. A shell (3) is provided with two groups of hydraulic cylinders (4); lathedogs (2) respectively on the left and the right are symmetrically embedded on the upper end of the shell (3); a bearing assembly 1 is arranged on the shell (3), thus forming the rotation control device as a whole. The lathedogs (2) on the left and the right are opened by extending the hydraulic cylinder (4) and closed by drawing back the hydraulic cylinder (4); the bearing assembly (1) is tightly clamped on the shell (3) so as to tighten two groups of upper and lower safety screws (7). The present invention solves the problem that the prior rotation control head in our country is low in level and incomplete, as well as the problems that the maintenance is difficult, the price of maintenance is high and the accessories are imported.

Description

technical field [0001] The invention relates to a mechanical control device, in particular to an underbalanced drilling rotation control device used in petroleum underbalanced drilling. Background technique [0002] At present, underbalanced drilling technology has developed maturely, and the effects of underbalanced drilling technology in discovering and protecting oil and gas layers and improving drilling speed have also been recognized. With the rapid development of the petroleum industry, underbalanced drilling technology has been regarded as a preferred technology in the field of petroleum drilling. [0003] Underbalanced drilling means that during the drilling process, the pressure generated by the formation in the wellbore is always greater than the pressure generated by the density of the drilling circulating medium, and the underbalanced drilling operation must always be carried out under pressure when the formation pressure is greater than the pressure generated by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/03
Inventor 孙道伶严凤春
Owner JIANGSU WEIDONG MACHINERY
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