Injection gun special for oilfield wellhead sealing device

A technology of sealing device and injection gun, which is applied in the field of oil field exploration, can solve the problems of inconvenient connection and fixation, laborious pressure on the ejector rod, easy leakage or leakage, etc., and achieves the effect of simple structure, simple connection and convenient injection process

Inactive Publication Date: 2016-11-23
TIANJIN BAOJUN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the sealing device of dynamic plastic injection packing, the injection gun needs to be used for injection. The existing structural design of the injection gun cannot completely match the injection port on the wellhead sealing device. It is inconvenient to connect and fix the two. It is easy to leak or escape during the material process. Moreover, the injection gun is usually pushed by the ejector rod to inject the filler into the wellhead sealing device. Because there is a certain pressure in the gun barrel, it is very laborious to press the ejector rod downward. The material process is time-consuming and labor-intensive, and the efficiency is low

Method used

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  • Injection gun special for oilfield wellhead sealing device
  • Injection gun special for oilfield wellhead sealing device

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Embodiment Construction

[0020] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0021] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention Creation and simplification of description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should no...

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Abstract

The invention provides an injection gun special for an oilfield wellhead sealing device, comprising a barrel and an injection component; one end of the barrel is provided with an injection head, and the other end of the barrel is provided with a gun rear cover; the injection component includes a push bar and a piston arranged in the barrel, one end of the push bar is connected to a piston, and the other end of the push bar runs through the gun rear cover and extends out of the barrel; the push bar is a threaded bar in threaded with the gun rear cover; the injection head comprises a first connecting portion connected with the barrel and a second connecting portion connected with an injection port of the wellhead sealing device. The injection gun is simple in structure and reasonable in design; by turning the push bar, the push bar pushes the piston to enter filling material, and the filling material is injected into the wellhead sealing device, with good convenience and low labor consumption.

Description

technical field [0001] The invention belongs to the technical field of oilfield exploration, and in particular relates to a special injection gun for an oilfield wellhead sealing device. Background technique [0002] In modern oil production, oil wells are mostly erected on the oil field. After the oil well is drilled into the oil layer, it is lowered into the oil layer casing, 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. Afterwards, according to the requirements of oilfield development, use a perforating gun to open the oil layer, form a channel, and lower it into the oil pipe, and use a suitable induction method to raise the oil from the bottom of the oil well to the head of the well. Usually, a sealing device is installed at the wellhead for sealing when sealing the well and producing oil. Aiming at the sealing device of dynamic plastic injection packing, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/03
CPCE21B33/03
Inventor 崔忠宝崔忠骏
Owner TIANJIN BAOJUN TECH DEV
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