Design of the Deflector Disc Valve for Static Push Vertical Drilling Tool
Rui Zhang a, Feng Sun b, Yifeng Wang c, Ruiwen Feng d and Yifan Yang d
aProfessor, College of Petroleum Engineering, China University of Petroleum (East China), Qingdao, 266580, China State Key Laboratory of Deep Oil and Gas, China University of Petroleum ( East China), Qingdao 266580, China
bSenior Engineer, SINOPEC Research Institute of Petroleum Engineering Co., LTD, Beijing 102206, China National Key Laboratory of Shale Oil and Gas Enrichment Mechanism and Efficient Development, Beijing 102206, China
cEngineer, Geosteering & Logging Research Institute, Sinopec Matrix Corporation, Qingdao, 266071, China
dGraduate Student, College of Petroleum Engineering, China University of Petroleum (East China), Qingdao, 266580, China State Key Laboratory of Deep Oil and Gas, China University of Petroleum ( East China), Qingdao 266580, China
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Abstract:
Under the technical background of static push vertical drilling tool, the design targeted at its key component - the annular disc valve is carried out. According to the friction force calculation of the disc valve, it is considered to design the valve seat structure in the form of a convex platform. Based on the finite element analysis, the clearance between the upper and lower plate valves and the height of the valve seat convex platform are determined. The annular valve structure and its flow path are further designed based on the quick shutdown response of the high and low sides of the hole. The horizontal bench test is carried out to verify its reliability. The results show that: In order to reduce the friction area of the disc valve, the two-layer combination designing is considered. The upper special-shaped hole with convex platform, and the lower special-shaped side channel structure are designed. The cemented carbide material is used to mould. The clearance between the upper and the lower disc valve should be controlled at 0.5mm, and the height of the disc valve convex platform should be controlled at 0.25mm accordingly. The horizontal bench test verifies the sealing and diversion effect of the valve. This paper provides reference for the design of vertical drilling tools.
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