Patent RU-2373380-C1 (RU)
IPC: E21B43/00
Filed: 2008-06-18
Granted: 2009-11-20
Abstract: FIELD: oil and gas production. 
     SUBSTANCE: invention is related to mining industry and may be used to develop gas, gas-condensate deposit for operative control and correction of formation fluid production process parametres. In method, production of formation fluid from deposit objects is done via operational wells combined with aprons and/or at least a single gas-collecting header into system of gas collection, arranged in accordance with a group centralised scheme, used to combine wells in clusters and to communicate them by means of aprons to plant attached to cluster for preliminary preparation of formation fluid, preferably, gas, gas condensate. At the same time specified plants are used to preliminarily separate of formation fluid. Each specified plant is connected by means of gas-collecting header to a gas-collection station that communicates to main gas line at the outlet, where complex separation of formation fluid is carried out, at least part of cleaned gas produced as a result of it is sent to main gas line. At least one operational well included into cluster is equipped with systems of operative, as well as remote control and generation of commands to correct parametres of formation fluid production process, and also with actuating mechanisms for realisation of specified correction, which is arranged in three levels of efficiency: the first level - instantaneous automatic disconnection of formation fluid, mostly, produced gas flow, gas condensate in case of emergency debit rise; the second level - smoothly going operative process in case of planned connection-disconnection of formation fluid supply or current variation of debit; and the third level - planned level, related to disconnection of flow string and/or disconnection of productive bed, well plugging or its changeover to fluid production from new bed. In order to realise the second level of fluid production process efficiency in composition of control equipment, at least one control valve is installed, which comprises body with central channel with a cell stop unit installed in it, with supply and drain nozzles and combined driving mechanism, which consists of at least of two driving mechanisms of single-directed action and single mechanism of counter-directed action. Cell stop unit includes at least a throttling gate valve. At the same time mentioned gate is rigidly connected to stem, on which mentioned driving mechanism are serially installed with a partial overlapping in length with the possibility of autonomous action, and one of them is arranged as main and hydraulic, and the other one - a duplicating mechanical or manual one, and the third mechanism of counter-directed action that combines and supplements them, is arranged in the form of automatic mechanism of stem reciprocal motions with the possibility for it to accumulate kinetic energy transformed into potential one in process of motion aimed at opening of control valve with main or duplicating driving mechanisms. 
     EFFECT: improved efficiency of deposit operation by faster reaction and improved quality of reaction to dynamic changes in process of formation fluid production, more efficient prevention of emergencies, reduced ecological contamination of environment with a produced formation fluid. 
     24 cl, 10 dwg