Titanium Alloy Drill Pipe First Used in Drilling and Production of Ultra-Short Radius Horizontal Well
After completing 6400m ultra-deep well drilling with titanium alloy drilling pipe for the first time in Northwest Oilfield of Sinopec in June 2020, on July 16, a three-way directional inclined sidetrack drilling task for a ultra-short radius horizontal well with a designed well depth of 7100m was successfully completed in West Oilfield and a new record of ultra-short radius drilling application was set.
At present, titanium alloy drill pipe can only be produced in a few countries, such as the United States. Therefore, the price is high and the order cycle is long.In order to meet the demand of domestic oil and gas field enterprises for "increasing exploration and development efforts" for high-strength drill pipes,In 2016, with the support of the national oil and gas science and technology major special project "deep and ultra deep well efficient and rapid drilling technology and equipment", CNPC Petroleum Pipe Engineering Technology Research Institute, together with Zhongshi Titanium Industry Co., Ltd. and Bohai Nengke Drill Pipe Co., Ltd., jointly carried out research on domestic titanium alloy drill pipe, and successfully developed high-strength titanium alloy drill pipe with independent intellectual property rights,Domestic high strength titanium alloy drill pipe will effectively avoid overload, leakage, corrosion and other failure accidents of traditional steel drill pipe under severe conditions such as ultra deep and short radius sidetracking. The relevant achievements will provide strong technical support for promoting the large-scale application of titanium alloy drill pipe technology in China and promoting the development of ultra deep and short radius drilling technology in China.
Yi Hao, technical director of drilling Institute of Northwest Oilfield Engineering Institute, said: "from the perspective of single drill pipe, the price of titanium alloy drill pipe is 20 times higher than that of steel drill pipe, but from the overall effect, after using titanium alloy drill pipe, the load of drilling rig can be reduced by more than 40%, so as to reduce the specification of drilling rig and reduce construction energy consumption,The service life of titanium alloy drill pipe in air is 10 times that of conventional drill pipe of the same specification, and 100 times of that of conventional drill pipe in corrosive environment, which greatly improves the safety and service life of drilling tools, and is especially suitable for drilling operations in complicated well conditions such as ultra deep wells and short radius wells in Northwest Oilfield.’’
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