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A simple pressure delivery wellhead protection device

A delivery device and wellhead device technology, applied in wellbore/well components, sealing/package, earthwork drilling and production, etc., can solve problems such as cumbersome operation process, high quality requirements for construction personnel, locking slippage, etc., to achieve Good effect, reduced reservoir pollution, simple structure effect

Active Publication Date: 2021-07-27
CNPC BOHAI DRILLING ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During on-site pumping construction, it is not only easy to cause locking slippage, but also the operation process is cumbersome, which requires high quality of construction personnel

Method used

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  • A simple pressure delivery wellhead protection device
  • A simple pressure delivery wellhead protection device
  • A simple pressure delivery wellhead protection device

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Embodiment Construction

[0015] The above content of the invention of the present invention will be further described in detail below in conjunction with specific embodiments. However, it should not be construed that the scope of the above-mentioned subject matter of the present invention is limited to the following examples. Without departing from the above-mentioned technical idea of ​​the present invention, various replacements and changes made according to common technical knowledge and conventional means in this field shall be included in the scope of the present invention.

[0016] Such as Figure 1-3 As shown, the simple pressurized delivery protection wellhead device of the present invention includes the upper structure of the delivery device and the lower structure of the delivery device. 2a and delivery inner tube 2b, delivery tube 2, delivery inner tube lock sleeve 3, delivery outer tube lock sleeve 4, blowout prevention seal shaft 5, blowout prevention seal shaft lock sleeve 6, fixed beam...

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Abstract

The invention discloses a simple pressurized delivery wellhead protection device, which comprises a delivery device upper structure and a delivery device lower structure. Among them, the upper structure of the delivery device mainly includes the upper joint pipe, the delivery pipe, the delivery inner pipe lock sleeve, the delivery outer pipe lock sleeve, the blowout prevention seal shaft, the blowout prevention seal shaft lock sleeve, the fixed beam lock sleeve, Protect the sealing tube and tubing packer assembly; the lower structure of the delivery device mainly includes the moving beam, the hoisting connection hole of the moving beam, the positioning bolts of the moving beam, the fixed beam, the intermediate pipe of the fixed beam and the two-stage hydraulic cylinder. The invention has the advantages of simple structure, safety and reliability, can be hung on the isolated oil production tree, increases the ground construction pressure limit during pumping, reduces reservoir pollution caused by well killing operations, and ensures good results in oilfield development.

Description

technical field [0001] The invention relates to a pressure operation device for a water injection well in an oil field, in particular to a simple pressure delivery wellhead protection device. Background technique [0002] Oilfield water injection wells are prone to clogging in the middle and later stages of development, resulting in high water injection pressure, and it is necessary to increase the water injection rate through acidification to remove plugging. In order to reduce the construction cost, the technology of plugging removal by acidizing without moving the string is usually adopted. Most of the water injection wells in the oilfield use 350-type Christmas trees. Due to the low pressure resistance level of the wellhead devices, the existing 700-type cement pump trucks suppress the pressure to 30MPa. The 1800 fracturing truck can suppress pressure to 40MPa, but it has exceeded the set pressure limit of the Christmas tree. Usually, when the acidizing pressure is hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/068
CPCE21B33/068
Inventor 平恩顺王林张世林田胜敏马田力潘艳萍赵永杰樊震刚刘玉洲白石
Owner CNPC BOHAI DRILLING ENG
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