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High-temperature high-pressure multi-compound sealed casing head

A high-temperature, high-pressure, composite sealing technology, which is applied in sealing/isolation, wellbore/well components, earthwork drilling and production, etc., can solve the problems of unsafe and reliable use, poor sealing effect, etc., and achieve safe and reliable use and prevent fluid leakage The effect of channeling and reducing the cost of production operations

Pending Publication Date: 2017-11-24
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the shortcomings of poor sealing effect and unsafe and reliable use of the existing casing head

Method used

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  • High-temperature high-pressure multi-compound sealed casing head
  • High-temperature high-pressure multi-compound sealed casing head
  • High-temperature high-pressure multi-compound sealed casing head

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Embodiment Construction

[0020] Such as figure 1 , figure 2 , image 3 As shown, a high temperature and high pressure multiple compound sealed casing head includes a cover flange 1, a high temperature and high pressure flat valve 7 and a casing head body 8; the upper end of the casing head body 8 is connected to the cover flange 1 and the casing head body 8 Both sides are connected with high-temperature and high-pressure flat valve 7, a mandrel hanger assembly 6 is installed inside the casing head body 8, and the mandrel hanger assembly 6 includes a mandrel hanger main body 10, and a mandrel hanger main body A positioning metal sealing steel ring 2 is arranged between the upper end of 10 and the cover flange 1, and an auxiliary non-metallic sealing ring 3 and an upper metal sealing assembly 4 are arranged between the outer wall of the upper end of the mandrel hanger main body 10 and the inner wall of the cover flange 1, A positioning anti-rotation sealing device 5 is arranged on the side wall of th...

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Abstract

The invention relates to a tool for drilling horizontal well in heavy oil thermal recovery deep layer, and in particular relates to a high-temperature high-pressure multi-compound sealed casing head. The upper end of a casing head body of the device is connected with a cover flange, high-temperature high-pressure flat valve is connected with each of two sides of the casing head body, a mandrel type hanger assembly is installed in the casing head body, and the mandrel type hanger assembly comprises a mandrel type hanger body. According to the casing head provided by the invention, utilization of the mandrel type hanger with multiple metal sealing structures is achieved, the casing head is resistant to high temperature and high pressure, reliable in sealing property, capable of preventing fluid from flowing upwards, strong in corrosion resistance and long in service life, prevents a casing pipe from expanding thermally to cause seal failure, and is capable of being exchanged with an emergence slip type hanger of the same specification for use, compact in structure, convenient to install and greatly reduced in production and operation costs; direct setting is achieved via a drilling blowout preventer, after positioning device is tightly screwed, a setting force is stable and durable, the positioning device is firm, and safety and reliability are achieved in use.

Description

Technical field: [0001] The invention relates to a drilling tool for deep horizontal wells in thermal recovery of heavy oil, in particular to a high-temperature and high-pressure multiple composite sealed casing head. Background technique: [0002] During the drilling process of deep horizontal wells in thermal recovery of heavy oil, most of the wells are completed with screens, without ground anchors, and the traditional method of hanging production casings is slips. Since crude oil is exploited by high-temperature and high-pressure multi-component injection, the cement must be cemented to the ground according to the process requirements. Therefore, the pipe string must be pulled to generate pre-tightening force to set the slips before the cement solidifies. The main disadvantages of this structure are: [0003] 1. When the cement is not solidified, there is a risk of well control when removing the blowout preventer and installing slips; [0004] 2. The time is not easy t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/04
CPCE21B33/04
Inventor 刘文科雷广财姜超国聪马锐李雪野刘福东
Owner BC P INC CHINA NAT PETROLEUM CORP
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