Special rotary blowout preventer for 27/8' drilling tools

A technology of rotating blowout preventer and drilling tools, which is applied in earthwork drilling, sealing/packing, wellbore/well components, etc. It can solve problems such as poor righting sealing ability and waste of drilling tools, and achieve reliable sealing and maintenance. Convenient and flexible effect

Inactive Publication Date: 2012-08-22
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] To overcome the unsuitability of the existing rotary BOP 2 7 / 8 "The problem of waste caused by the use of drilling tools and poor righting and sealing ability, the present invention provides a 2 7 / 8 "Special rotary blowout preventer for drilling tools. The rotary blowout preventer has the characteristics of small size, quick installation, reliable sealing and strong righting ability. It is especially suitable for 2 7 / 8 "Drilling tool use

Method used

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  • Special rotary blowout preventer for 27/8' drilling tools
  • Special rotary blowout preventer for 27/8' drilling tools

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with accompanying drawing:

[0015] Depend on figure 1 shown, a 2 7 / 8 "The rotating blowout preventer for drilling tools includes a driver 1, a center pipe 2, an upper cover 3, a lower cover 13 and a housing 15. The driver 1 and the center pipe 2 are connected by bolts, and the bottom of the center pipe 2 is Bolts are connected to the rubber core flange 14, and the bottom of the rubber core flange 14 is connected to the rubber core 17. The rubber core 17 and the drill pipe inside are interference fit, which plays a role in straightening the drill pipe. Between the driver 1 and the upper cover 3 and between the lower cover 13 and the rubber core flange 14 are all limited by steps. The top of the top is provided with a step, and the top of the step is positioned on the bottom of the lower cover 13.

[0016] The bottom of the upper cover 3 is connected to the upper gland 4 by bolts, and an upper fri...

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Abstract

The invention relates to a special rotary blowout preventer for 27 / 8' drilling tools, which mainly solves the problems of waste and poor centralizing and sealing capabilities which are caused by the fact that existing rotary blowout preventers are not applicable to 27 / 8' drilling tools. The special rotary blowout preventer is characterized in that a bolt at the bottom of a central tube (2) is connected with a rubber core flange (14), a rubber core (17) is connected with the bottom of the rubber core flange (14), an upper friction sleeve (5) and an upper moving sealing group (6) are arranged inside a circular gap between the central tube (2) and an upper pressing cover (4), a lower friction sleeve (11) and a lower moving sealing group (10) are arranged inside a circular gap between the central tube (2) and a lower pressing cover (12), and the upper pressing cover (4) and the lower pressing cover (12) are in bolted connection and are arranged on a middle outer cylinder (9) outside a bearing (8). The rotary blowout preventer has the advantages of being small in volume, fast to install, reliable in sealing and high in centralizing capability and is particularly applicable to 27 / 8' drilling tools.

Description

technical field [0001] The invention relates to a device used on the wellhead of an oil field, in particular to an anti-theft and anti-freezing sampling device. Background technique [0002] At present, domestic medium and shallow small drilling tools, especially 2 7 / 8 "Drilling tool underbalanced drilling mostly adopts 5" rotating BOP to replace the small-sized rubber core and use it in conjunction with a large drilling rig, resulting in waste of drilling rigs and wellhead BOP groups. Rotation, dry grinding, and leakage pose hidden dangers to the wellhead safety of underbalanced drilling with small drilling tools. Contents of the invention [0003] To overcome the unsuitability of the existing rotary BOP 2 7 / 8 "The problem of waste caused by the use of drilling tools and poor righting and sealing ability, the present invention provides a 2 7 / 8 "Special rotary blowout preventer for drilling tools. The rotary blowout preventer has the characteristics of small si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/06
Inventor 马晓伟白晓捷杨智光徐永辉杨决算于成龙韩玉安耿晓光高翔杨毅董玉辉
Owner BC P INC CHINA NAT PETROLEUM CORP
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