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A Wellhead Suspension Device Suitable for Small Diameter Coiled Tubing Operation

A suspension device and small-diameter technology, applied in wellbore/well components, sealing/packaging, earth-moving drilling, etc., can solve the problems of inability to meet the technical requirements of small-diameter coiled tubing wellhead suspension operations, and achieve a high success rate. Effect

Active Publication Date: 2022-04-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly aims at the problem that the existing wellhead suspension device cannot meet the technical requirements of small-diameter coiled tubing wellhead suspension operation, and designs and provides a wellhead suspension device that meets the requirements of small-diameter coiled tubing operation

Method used

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  • A Wellhead Suspension Device Suitable for Small Diameter Coiled Tubing Operation
  • A Wellhead Suspension Device Suitable for Small Diameter Coiled Tubing Operation
  • A Wellhead Suspension Device Suitable for Small Diameter Coiled Tubing Operation

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] see figure 1 The suspension device of this small-diameter coiled tubing wellhead operation comprises guide device 1, conversion device and three parts of hanger arranged in order from top to bottom, and the concrete structure of each part is described as follows.

[0031] see figure 2 : the guide device 1 is a semi-circular wheel structure, with a rim, spokes, and a hub, and a guide groove 10 adapted to the oil pipe is arranged on the peripheral surface of the rim, and the device is connected with the support frame (L-shaped connecting rod) 2 Converter connection.

[0032] see image 3 : the conversion device is composed of a conversion device body 5, a sealing assembly 4, and a compression cap 3. The conversion device body 5 is a tubular structure, and there is a step in its central hole for arranging the sealing assembly 4; the conversion device The out...

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Abstract

The invention discloses a wellhead suspension device suitable for small-diameter coiled tubing operations, including a hanger, a conversion device and a guide device; the hanger is used for hanging small-diameter coiled tubing at the wellhead, and at the same time plays a role of sealing the small-diameter coiled tubing and gas well tubing ring The role of space, by changing the internal structure of the hanger, the passage and suspension requirements of the small-diameter coiled tubing downhole tool string with the upper, lower, and larger "┻" structures are realized; the conversion device is used to connect the blowout prevention system during daily injection operations, providing Daily blowout prevention, and at the same time, it is used to connect the guiding device when the small-diameter coiled tubing is suspended at the wellhead, which can prevent the small-diameter coiled tubing from being deformed and broken due to excessive bending.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas exploitation, and in particular relates to a suspension device suitable for wellhead operations of small-diameter coiled tubing. Background technique [0002] In the field of oil and gas wells, the conventional coiled tubing wellhead hanger structure in the prior art adopts slip type, rectangular seal and other structures, and the applicable pipe diameter is 11 / 4”~3”. In the range of tons to 60 tons, the tensile strength is high. The small-diameter coiled tubing in use is made of 316L small-diameter coiled tubing, with a load-carrying capacity of only 2 to 2.5 tons and low tensile strength. In addition, the small-diameter coiled tubing downhole string has a special-shaped structure, that is, the diameter of the downhole tool string is 44.5mm, and the diameter of the small-diameter coiled tubing is 9.525mm, which is an inverted "T" structure. The wellhead hanger structure of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/04
CPCE21B33/04
Inventor 柏明宏夏亮亮王旭李祖友严小勇鲁光亮刘大永王雨生赵军昌张帆黄文杰杨筱璧王冬魏朝勇乔林傅春梅田传元朱存实张越符东宇于凯杨波姚远胡腾王峻峰
Owner CHINA PETROLEUM & CHEM CORP
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