Research On Integration Technology Of Wellhead Bop Used In Snubbing Service

Though analyzing the process of application status of technology and equipment of snubbing service at home and abroad, described the working mechanism, advantages and disadvantages of different structure of wellhead blowout preventer device. On the basis of optimized equipment of snubbing service at home and abroad and proposed the technology research about the equipment of BOP wellhead snubbing service. In order to solve the problem of workover operations safety in oil field, efficient and so on, made the integration design programs of BOP wellhead snubbing service; developed a new type of wellhead blowout preventer system with oil under pressure operating on-site practical work.The integrated system design solves the pressure injection well workover operations with quick installation, transportation and other requirements.Ram Blowout Preventer achieved accurate allowing the coupling, the moves of its switch controled through the detect signals sent from hoop detection devices, the role of pressure balance device is balance the pressure difference blowout preventer gates before the action, so that BOP the upper and lower ram pressure balance under the conditions of action switches to reduce the impact of the system, reducing the top of the plastic core of the wear and prolong the life of the rubber core.BOP wellhead with pressure operation system as a whole to move device mainly consists of the bottom of the frame, the supporting frames, telescopic hydraulic cylinders, support beams and a number of key connection parts. The device can reduce the wellhead installation and removal time and improve operational efficiency under pressure. Proposed the welded steel structure which material is steel as the operating wellhead blowout preventer system with pressure as a whole framework for the relocation of equipment foundation, the plan make the flange beam and hollow square steel as carriage, and this basis integrated BOP, lifting cylinder the bottom frame, the supporting frames and others, overall the structure is compact, force is reasonable, Safety is stable. Carried out the structural design on the framework of bottom, supporting frames, telescopic hydraulic cylinders, bearings and other parts, and ANSYS analysis and calculation results show that the load of 10 to 30 tons to meet the strength requirements.Application of finite element analysis software integrated system for structural statics analysis to determine the safety and reliability of the system.In the theoretical study based on the indoor and field experiment,experimental proved that the system can adapt to the oil field operational requirements.