Safety blowout preventer for oilfield wellhead

A blowout preventer, safe technology, used in isolation devices, wellbore/well components, springs/shock absorbers, etc., to solve problems such as fractures

Active Publication Date: 2021-11-02
山东尤科斯石油装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an oilfield wellhead safety blowout prevention device to solve the problem of blowout caused by fracture of the polished rod in the wellhead of the drilling wellhead proposed in the above-mentioned background technology

Method used

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  • Safety blowout preventer for oilfield wellhead
  • Safety blowout preventer for oilfield wellhead
  • Safety blowout preventer for oilfield wellhead

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0027] see Figure 1-7 , an embodiment provided by the present invention: an oil field wellhead safety blowout prevention device, including a mounting joint 2, the upper end of the mounting joint 2 is integrally provided with a casing 1, and a sealing cover 3 is installed on the upper end of the casing 1, and the sealing cover The plate 3 and the shell 1 are sealed and fixed by bolts. The inside of the shell 1 is provided with a blowout prevention and pressure relief chamber 5. The lower end of the blowout prevention pressure relief chamber 5 is installed with a first polished rod fixing seat 6. The second polished rod holder 7, the middle position inside the first p...

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Abstract

The invention discloses a safety blowout preventer for an oilfield wellhead, relates to the technical field of safety protection devices for drilling wellheads, and aims to solve the problem of blowout caused by breakage of a polish rod in an existing drilling wellhead due to various factors. A shell is integrally arranged at the upper end of a mounting joint; a blowout prevention pressure relief cavity is formed in the shell; a first polish rod fixing seat is mounted at the lower end of the blowout prevention pressure relief cavity; a second polish rod fixing seat is mounted at the upper end of the blowout prevention pressure relief cavity; polish rod channels are formed in the middles of the insides of the first polish rod fixing seat and the second polish rod fixing seat; arc-shaped pressed blocks are mounted on two sides of the upper portions of the first polish rod fixing seat and the second polish rod fixing seat; a sliding limit seat is integrally arranged at one end, close to the shell, of each arc-shaped pressed block; and plugging devices are mounted on one side of the lower portion of a sealing cover plate; and one side of the lower portion of the first polish rod fixing seat and one side of the lower portion of the second polish rod fixing seat.

Description

technical field [0001] The invention relates to the technical field of drilling wellhead safety protection devices, in particular to an oilfield wellhead safety blowout prevention device. Background technique [0002] Oil wells are perforations drilled by drilling methods. Generally, after the oil well is drilled into the oil layer, the oil layer casing is lowered, and oil well cement is injected into the annular space between the casing and the well wall to maintain the well wall and seal the oil, gas, and water layers. The hole gun shoots through the oil layer to form a channel, which is lowered into the polished rod, and the oil is raised from the bottom of the oil well to the wellhead with a suitable induction method. The polished rod is a special pumping rod for connecting the sucker rod and the rope suspension oil stick. Because it is at the uppermost part of the sucker rod, it bears the greatest force, so the diameter of the polished rod is larger than that of the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/06E21B36/00F16F15/067
CPCE21B33/06E21B36/001F16F15/067
Inventor 魏福芝车希国刘志振刘永明
Owner 山东尤科斯石油装备有限公司
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