Recently, China's first 140 mpa domestic caged jacket throttle valve has been successfully applied in Well Kesen 134 of Petrochina tarim Oilfield. "Guardian" Ma Lei has to check its "physical condition" every day. Keshen 134 well has been running continuously since it was installed with "China Core" for 26 days. By July 13, it had produced 45.18 million cubic meters of gas.

    Valve is an essential control equipment in petrochemical production. There are many kinds of valves. With the continuous improvement of the technological process of all kinds of complete sets of equipment, the types of valves are still increasing. "Twelfth five-year" period, the petrochemical industry in large petrochemical, oil and gas gathering pipelines, coal liquefaction and other major construction projects supporting the valve product development for the development of a key, more than 80 ton and ethylene cracking furnace outlet line of form a complete set with high temperature, large diameter high pressure ball valve, valve, large diameter pipeline ball valve, such as liquefied natural gas with cryogenic valves production increase significantly.

    Although China's petrochemical valve has made progress in the high-end market has a place. But in the petrochemical industry, such as cage type throttle valves and other products still need to be imported.

    Kuqa piet is the main area for CNPC to produce 30 billion cubic meters of natural gas in The construction of Tarim. Each well is characterized by ultra-deep, ultra-high pressure and ultra-high temperature, which requires very high exploration and development technology and process. In Keshen 13 block, the average buried depth of the reservoir is 7,400 meters, and the static pressure of single well shut-in is generally more than 110 mpa. The development complexity of the gas reservoir requires high performance of the wellhead throttle valve. That means 100 megapascals is equivalent to 10,000 tons of weight per square meter. The pressure has made it difficult to extract every cubic metre of gas.

    For a long time, the throttle valve used in keshen gas field wellhead has been imported from abroad, and not only the key technology has been controlled by others. And the cost is high and the purchase cycle is long, which is very unfavorable for the construction of engineering projects. Therefore, Tarim Oilfield takes the "140 mpa domestically made cage-jacket throttle Valve project" as a major pilot test project, and tries its best to solve the practical problems in the development process of Keshen gas field.

    The project developers through continuous optimization of the structure of seal design and perfect the material formula, in view of the "SanChao" area of the kuqa piedmont gas reservoir development difficult problem, is to learn from experience at home and abroad, continue to strengthen the subject research of high pressure module, the pursuit of more pressure and more reliable sealing technology, to achieve the strength of 213 million mpa pressure test without leakage, Created the same type of products dynamic seal pressure record.

    It has been proved by practice that the five exploration Wells and evaluation Wells deployed in Keshen 13 block have obtained high production gas flow, which further confirms the natural gas scale of Keshen 13 gas reservoir, directly promotes the drilling of Keshen 21 well with the designed well depth of 8220 meters, and accelerates the exploration process of Talimu oilfield to 8,000 meters well depth.

    At present, in view of the "SanChao" area of the kuqa piedmont gas reservoir development difficult problem, is to learn from experience at home and abroad, continue to strengthen the tarim oilfield high pressure block of subject research, will intensify promote the use of 140 million mpa localization of throttle, speed up the construction of tarim, 30 million tons of large gas fields process and contribute to national energy efficient development.