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Intubation and isolation device

A technology of isolation device and sealing device, which is applied in the direction of sealing/isolation, wellbore/well components, production fluid, etc., and can solve the problem that is not suitable for offshore thermal recovery wells and difficult to meet multiple rounds of repeated plugging and unplugging of offshore thermal recovery wells production conditions and other issues, to achieve the effect of high efficiency, convenient operation and low risk

Active Publication Date: 2018-12-21
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The insertion and sealing devices in the prior art are mostly developed for conventional oil production and water shutoff, and the working cylinder and packer are designed together, which is difficult to meet the production conditions of multiple rounds of repeated insertion and extraction in offshore thermal production wells. Suitable for offshore thermal recovery wells

Method used

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Embodiment Construction

[0025] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0026] Embodiments of the present invention provide a cannula isolation device, such as figure 1 As shown, it includes: an intubation tube assembly, a mandrel 4 and a sealing device.

[0027] Wherein, the intubation assembly includes variable buckle joint 1, cannula nipple 2 and cannula 3, and the upper and lower ends of cannula nipple 2 are airtightly connected with variable buckle joint 1 and cannula 3 respectively, specifically, the cannula nipple 2 is a threaded sub-joint with threads on the inner wall surface, and threads are provided on the outer walls of the variable ...

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Abstract

The invention discloses a packing device for an inserting pipe. The packing device comprises an inserting pipe assembly including an adapter connector, a short section of the inserting pipe and the inserting pipe. The upper end of the short section of the inserting pipe is connected with the adapter connector in a sealing manner. The lower end of the short section of the inserting pipe is connected with the inserting pipe in a sealing manner. The packing device comprises a working cylinder. The working cylinder can be connected with a releasing handle at the lower portion. The lower end of the inserting pipe penetrates through the working cylinder. The packing device also comprises a sealing device arranged between the inserting pipe and the working cylinder. The packing device for the inserting pipe has following beneficial effects: the packing device is applicable to the technical field of oil exploitation; the inserting pipe and the working cylinder are adopted for utilization in a matching mode so that a pipe column is conveniently and easily subjected to rountrip operation at the low risk and high operation effectiveness is obtained; and the packing device for an inserting pipe is capable of effectively packing annular space of an oil sleeve and prevents a kill fluid from entering a strata and avoids pollution of the kill fluid to an oil layer.

Description

technical field [0001] The invention relates to the field of oil exploitation equipment, in particular to an intubation tube isolation device. Background technique [0002] The huff and puff of multi-element thermal fluid is an economical and effective technical method for developing offshore heavy oil fields. By injecting multi-element thermal fluid, the temperature of the oil layer is increased, the viscosity of crude oil is reduced, and the flow capacity of crude oil is improved. At the same time, the injected nitrogen helps to expand the capacity of the multi-element thermal fluid. Sweeping range, increasing energy and maintaining pressure, the injected carbon dioxide has the effect of dissolving, swelling and reducing viscosity of heavy oil, so as to achieve the purpose of improving oil recovery. [0003] Due to the limitations of equipment and space, the huff and puff of multiple thermal fluids in offshore heavy oil fields can only use two separate pipe strings for ste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/12E21B43/24
Inventor 刘花军孙永涛胡厚猛马增华顾启林王通孙玉豹林涛
Owner CHINA NAT OFFSHORE OIL CORP
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