Research On Cuban Offshore Extended-reach Horizontal Well Drilling And Completion Technology

This article mainly aims at the extended-reach horizontal well of the Cuban offshore shallow horizontal well geological characteristics,reservoir characteristics,Formulated a series of extended-reach horizontal well cost analysis and risk assessment methods,And through certain theoretical research to develop a set of suitable for extended-reach horizontal well drilling and completion technology solutions.Include extended-reach horizontal well track and well bore structure optimization design of extended-reach horizontal well drilling tool combination optimization design;extended-reach horizontal well torque,friction control technology;Hole cleaning technical measures;extended-reach horizontal well drilling safety measures,etcThis article through to the development of professional tools the extended-reach horizontal well,formulate a set of forming the extended-reach horizontal well l drilling and completion technology,Including 1.the extended-reach horizontal well anti-friction,reduce torque tools,and forecast analysis of friction torque,tuning parameters,increasing the stretch as far as possible,reduce the torque.2.Two-way reaming tools of research and development,the two-way reaming tools adopted the prismatic spiral design structure and inlay alloy cutter,can completely eliminate the sidewall drift process of micro level,reduce the risk of drilling.3.Complete the hole cleaning tools.The tool shape similar to drill spiral centralizer,radial distribution of many spiral cutter,along with the rotation of the drill,the cuttings bed smashed up and with the carrying out of the wellbore drilling fluid,and the tool of special design can instantly improve drilling fluid migration rate,thus improve the effect of cuttings migration,finally realizes the cuttings removal.4.The floating collar casing technology is implemented very well.5.A continuous loop drilling system tools.The system tools can keep the continuous cycle of drilling fluid in hole,hole helps eliminate stop and start pump caused by pressure change and pressure fluctuation,managed to avoid the Cuban extended-reach horizontal well sticking.