Patent RU-2190781-C1 (RU)
Title: Oil-well jet plant for testing and completion of oil wells and method of plant operation
Inventor: KHOMINETS ZINOVIJ DMITRIEVICH
IPC: F04F5/46
Filed: 2001-07-31
Granted: 2002-10-10
Abstract: FIELD: oil producing industry. SUBSTANCE: invention relates to jet plants for oil production and well stimulation. Said plant has intake funnel with liner, packer with through channel and jet pump, all installed on tube string. Pump housing accommodates on or several coaxially installed active nozzles with mixing chamber and active medium supply channel for each nozzle, and stepped through channel is made with seat between steps for mounting sealing unit. Plant is furnished with radiator and receiver-converter of physical fields installed on logging cable with tip passed through axial channel of sealing unit. Pump housing is provided with several channels to supply handled medium. Inlet section of funnel is located not lower than productive formation top. Summary area of cross section of channel supplying active medium is not smaller than summary area of outlet cross section of active nozzles. Axes of nozzles are parallel to axis of through channel and are located from the latter at a distance not less than 0.55 of diameter of larger step of through channel of pump housing, or at a distance not less than 0.575 of diameter of smaller step of pump housing through channel. Diameter of larger step of pump housing through channel located higher than seat is at least 0.5 mm greater than diameter of its smaller step located below seat. Sealing unit is installed for movement on cable passed through axial channel of sealing unit and it is installed for alternate replacement by functional inserts: pressure testing, depression, locking ones, and also insert for recording formation pressure restoration curves in underpacker space and insert for hydrodynamic vibration action onto productive formation bottom-hole zone. Diameter of axial channel of sealing unit is 0.6 of outer diameter of sealing unit, maximum. Axes of sealing unit and functional inserts are aligned with axis of through channel of pump housing. Functional inserts are made for mounting bottom-hole devices under inserts and are furnished with special means for delivery and extraction of such devices from pump housing by means of cable devices. Sealing unit is made for mounting on cable without disconnection of tip. Radiator and receiver-converter is connected to tip for replacement by other bottom-hole devices. Outer diameter of pump housing is 2 mm less than inner diameter of well casing, minimum. Diameter of sealing unit is I mm less than inner diameter of tube string above pump, minimum. Diameter of radiator and receiver-converter is at least I-mm less than diameter of lower step of pump housing through channel and diameter of through channel of packer. Diameter of cable is at least 0.001 mm less than diameter of sealing unit axial channel. Places for mounting check valves or stoppers are provided in lower part of handled medium supply channels. EFFECT: optimization of plant design member dimensions and sequence of operations at intensification of well and increased plant capacity. 3 cl, 6 dwg