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Underground oil and gas nozzle

An oil and gas and oil nozzle technology is applied in the field of throttling devices for high-pressure oil and gas wells, which can solve problems such as unfavorable popularization and application, and achieve the effects of increasing wellhead temperature, reducing production pressure, and reducing unloading flow.

Inactive Publication Date: 2013-02-06
SHAANXI QIYUAN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, both methods have limitations and are not conducive to popularization and application.

Method used

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  • Underground oil and gas nozzle

Examples

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Effect test

Embodiment 1

[0014] A downhole oil and gas nozzle according to the present invention includes a hollow cylindrical body 1, one end of the body 1 is provided with a nozzle 4, the nozzle 4 is a hollow cone, and the nozzle 4 is also provided with a bottom cap 5 matching its shape .

[0015] The main body 1 is further provided with a locking block 2, which is obliquely arranged on the main body 1 through a spring. The angle formed between the lock block 2 and the body 1 is α, and α is 15°.

[0016] In addition, the outer surface of the main body 1 is provided with an external thread 3 matching with the thread of the setting nipple.

[0017] When in use, the present invention is put into the setting sub-joint, the setting sub-joint is lowered to the design depth along with the completion pipe string, and then the well is opened for production. When it is necessary to change the specifications of downhole oil nozzle 4 according to the production situation of oil and gas wells, first fish it ou...

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Abstract

The invention provides an underground oil and gas nozzle and relates to a high-pressure oil and gas well throttling device working under the ground. The underground oil and gas nozzle comprises a hollow cylindrical main body; an oil nozzle is formed at one end of the main body and is a hollow cone; and lock blocks are also obliquely arranged on the main body. The underground oil and gas nozzle has the benefits that the production pressure is reduced, the wellhead temperature is improved, the generation conditions of hydrates are damaged, and the hydrates can be effectively prevented; and in addition, the minimum discharge rate of a wellhead of a gas well is reduced, and the liquid-carrying capacity of the gas well self is enhanced, so that the production of the gas well with lower liquid yield tends to be more stable.

Description

technical field [0001] The invention relates to a throttling device for a high-pressure oil and gas well working underground. Background technique [0002] High-pressure oil and gas wells must be equipped with throttling devices such as oil and gas nozzles or needle valves to control oil and gas well production and wellhead pressure. When the gas passes through the pores whose flow cross section suddenly decreases, the temperature and pressure will decrease and the specific volume will increase due to the large local resistance. When the temperature drops to the dew point temperature of natural gas, the gas will freeze to form hydrates and block the wellhead, resulting in the shutdown of oil and gas wells. During the development of gas fields, gas wells shut down due to the production of hydrates to varying degrees, which brings difficulties to the production management of gas wells. At present, there are mainly two solutions: one is to increase the temperature of natural ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/06
Inventor 张淑芬
Owner SHAANXI QIYUAN TECH DEV
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