【Major Industrial Equipment in the Chemical Industry】115 – China’s first domestically produced cage-type throttle valve with a pressure rating of 140 megapascals
Thread Content
The past decade has been a period of rapid development for China’s chemical industry, marked by the emergence of many new processes, products, and equipment. There has also been significant progress in China’s chemical processing equipment, which has contributed to the swift advancement of the petrochemical sector. Here, we have compiled some of the achievements and breakthroughs made by Chinese equipment manufacturers in terms of larger-scale production and increased use of domestic equipment. We invite everyone to share their insights and discuss these topics together; let’s cheer for Made in China and support the development of chemical processing equipment! ***********************************
More people are welcome to participate in the relevant discussions. Click on the blue link to access it: The 【HaiChuan Equipment Guessing Game】 series is being updated continuously in 2022; all fans are invited to join actively! https://bbs.hcbbs.com/thread-2079686-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Industry Forum) Summary post on the series 【Major Equipment in the Chemical Equipment Industry】 https://bbs.hcbbs.com/thread-3312079-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Industry Forum) Summary post discussing the components of cracking furnace equipment for 【Ethylene Cracking】 https://bbs.hcbbs.com/thread-3308724-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Industry Forum)
The Kuqa foreland is the key area for CNPC’s efforts to produce 30 billion cubic meters of natural gas in the Tarim Basin; the wells in this area are characterized by extreme depths, ultra-high pressures, and ultra-high temperatures, which imposes very high demands on exploration and production technologies and processes. Among them, in Block Ke Shen 13, where the average depth of the reservoir is 7,400 meters, the static pressure at the wellhead when the wells are shut down generally exceeds 110 megapascals; this high level of complexity in gas reservoir development imposes extremely strict requirements on the performance of the wellhead throttle valves. This means that 100 megapascals is equivalent to a weight of 10,000 tons per square meter. The immense pressure makes it particularly difficult to extract every cubic meter of natural gas. For a long time, the throttle valves used at the wellheads of the Keshen gas field have relied on imports from abroad, with key technologies under foreign control. As the group company accelerates the construction of projects to increase oil and gas equivalent production in Xinjiang by 50 million tons, the high prices and long procurement times of imported throttle valves are clearly no longer suitable for the comprehensive development of these gas fields. “The \"140 MPa Domestic Cage-Type Throttle Valve Project\" is a major pilot project in the Tarim Oil Field, aimed at addressing the practical challenges encountered during the development of the Keshen gas field. By continuously optimizing the design of the sealing structure and refining the material formulations, this project pursued a more pressure-resistant and reliable sealing technology; as a result, it achieved no leakage during pressure tests at 213 megapascals, setting the highest record for pressure resistance in dynamic seals among products of this type. All 5 exploration wells and evaluation wells deployed in the Keshen 13 block produced high-volume gas flows, further confirming the scale of the natural gas reserves in this field. This also facilitated the drilling of Well Keshen 21, which was designed to have a depth of 8,220 meters, thus accelerating the progress of exploration in the Tarim Oil Field toward well depths of 8,000 meters.
This article discusses the application of throttle valves from well-known foreign companies in the Tarim Oil Field from four aspects: the flow characteristics of throttle valves, the structure of throttle valves, the operation of actuators, and the materials used for throttle valve cages. Among the four performance aspects, mismatches in the flow characteristics of the throttle valve have the most significant impact on the valve’s operational performance; therefore, special attention should be paid to the selection of the rated flow coefficient, as well as to ensuring compatibility between the valve’s flow characteristics and those of the gas well. Throttle valves (commonly known as oil nozzles) are specialized devices used for throttling in high-pressure, high-flow gas fields. To cope with the harsh operating conditions in the high-pressure and high-output gas fields of the Tarim Oil Field, products from well-known foreign companies are used; the average price of imported throttle valves is over $50,000. However, in practical use, without exception, these valves suffered from erosion wear and erosion-induced failure to varying degrees, exhibiting defects such as poor stability and uncertain failure cycles. There are mainly two types of throttle valves used in the Tarim Oil Field: one is the sleeve-cage type, and the other is the cage-plunger type. Both types of throttle valves operate on the principle of hydraulic energy consumption, utilizing the sliding of a sleeve over a cage (or the sliding of a plunger within a cage) to create different flow areas in order to control flow rate and pressure. To ensure a continuous supply of natural gas from high-pressure, high-output gas fields to the West-East Gas Pipeline, the problems that arise with the use of throttle valves in the Tarim Oil Field need to be carefully studied.
This one is from the Xuanhan gas field; it’s probably imported
Like: victory: