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Antifreezing sampling valve used for oilfield well

A sampling valve and oilfield technology, applied in wellbore/well valve devices, wellbore/well parts, earthwork drilling and production, etc., can solve problems such as inconvenient sampling, unsmooth sampling, blockage of shut-off valves, etc., to reduce labor Strength, improve work efficiency, increase the effect of economic benefits

Inactive Publication Date: 2005-05-25
戴义明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In winter, due to the low temperature, the shut-off valve is often blocked by freezing, making it impossible to sample smoothly. The solution is to use steam to bake the carburetion before taking out the sample, which brings great inconvenience to daily sampling.

Method used

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  • Antifreezing sampling valve used for oilfield well

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Embodiment Construction

[0010] see figure 1 , the antifreeze sampling valve for oilfield wellhead according to the present invention includes a valve body 1 and a valve stem 2 installed in the valve body 1 . The inner hole of the valve body 1 is divided into three parts with different diameters, forming two steps, the part with the smallest diameter has threads, and the valve body with the middle diameter part is equipped with a sampling nozzle 6 . The valve stem is installed in the valve body through threads, and one end has a conical head placed in the largest diameter hole in the valve body, that is, the valve disc. When the valve stem is rotated, the conical surface of the conical head contacts the inner hole step, that is, the valve seat When the valve is closed, if there is a gap between the two, the oil will flow out from the gap, and the sample can be taken out; the other end of the valve stem is equipped with a handle 4. To prevent leakage, a sealing ring 8 is installed between the valve st...

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PUM

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Abstract

The present invention relates to a freeze-proof sampling valve of wellhead for oil field. Said sampling valve includes valve body and valve stem mounted in the valve body. Said invention also provides the structure characteristics of said valve body and valve stem respectively, between the valve stem and valve body a sealing ring is mounted. On the external cylindrical surface of said valve body a sampling nozzle is mounted, and on said sampling nozzle and a sealing ring also is mounted.

Description

technical field [0001] The invention relates to a special valve for wellhead sampling, in particular to an antifreeze sampling valve for oilfield wellheads. Background technique [0002] At present, the sampling work of the wellhead in the oil field is to install a shut-off valve with a plug at one end of the nozzle sleeve connected with the delivery oil pipe. In winter, due to the low temperature, the shut-off valve is often blocked by freezing, making it impossible to sample smoothly. The solution is to use steam to bake the carburetor before taking out the sample, which brings great inconvenience to daily sampling. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned defects and provide a convenient antifreeze sampling valve for wellheads in oil fields. [0004] The antifreeze sampling valve used for oilfield wellheads according to the present invention includes a valve body and a valve stem installed in the valve b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/02E21B49/08
Inventor 戴义明
Owner 戴义明