A fixed orifice and method of designing a fixed orifice

By designing a fixed oil nozzle made of corrosion-resistant alloy 718 and hard alloy YG8, the problem of easy damage to the oil nozzle was solved, the stability and safety of oil and gas transportation were achieved, and maintenance costs were reduced.

CN122328067APending Publication Date: 2026-07-03CNPC BOMCO DRILLING&PROD EQUIP CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CNPC BOMCO DRILLING&PROD EQUIP CO LTD
Filing Date
2025-01-02
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

In oil and gas well surface testing and production processes, nozzles are susceptible to damage from the complexity of backflow fluids, leading to equipment damage, environmental pollution and safety hazards. Furthermore, the material wear is accelerated in the high-pressure fluid flow, resulting in high replacement costs.

Method used

Design a fixed oil nozzle, including an oil nozzle sleeve, an oil nozzle, and a sealing ring, using corrosion-resistant alloy 718 and hard alloy YG8 materials. The oil nozzle is interference-fitted into the oil flow channel, and the sealing ring is embedded in the oil nozzle sleeve. The annular body fits with the inner wall of the throttle valve to ensure stability and sealing.

Benefits of technology

It improves the continuity and safety of oil and gas transportation, reduces the risk of leakage, extends the service life of nozzles, and reduces maintenance costs.

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Abstract

This invention discloses a fixed oil nozzle and its design method, relating to the field of fixed oil nozzle technology. It includes an oil nozzle sleeve, an oil nozzle, and a sealing ring. The oil nozzle sleeve has an oil flow channel extending through both ends along its length. Each end of the oil flow channel has a high-pressure inlet and a low-pressure outlet for oil and gas flow and for the entry of produced material. The oil flow channel extends axially downwards and then contracts to form a limiting step for the oil nozzle. The oil nozzle is interference-fitted into the oil flow channel, and the length of the oil nozzle is consistent with the length of the oil flow channel. This invention features a robust structure and good sealing performance.
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Citation Information

Patent Citations

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