FIELD: engines and pumps.
SUBSTANCE: proposed unit comprises jet pump and packer mounted on tubing with inlet funnel. Jet pump housing accommodates active nozzle and mixing chamber with diffuser. Besides, its has steeped flow channel converging from top to bottom (SFC) with mount seat between steps, channel to feed fluid pumped from well communicated with SFC and above said mount seat, and channel to feed active fluid communicated, on outlet side, with active nozzle and, on inlet side, with tubing annulus above packer. Active fluid feed channel incorporates check valve pressed by spring against valve seat, SFC is located aligned with tubing and communicated therewith to allow mounting sealing assy therein. Said assy represents hollow cylinder case to house sealing element with axial channel to receive smooth-wall tube coupling. The latter is suspended on logging cable. Coupling top end is located above jet pump casing while its bottom end is located under inlet funnel. Said coupling is consists of top and bottom parts. Note here that coupling top part is passed through axial channel of sealing assy arranged there above. Bore bit to destruct proppant plug, sealing collar arranged in tubing under jet pump casing to slide inside said tubing are mounted on coupling bottom section from bottom to top. Thin-wall tube wall has temporary opening arranged above sealing collar, while thin-wall tube coupling length is, at least, one metre larger than distance from well bottom to jet pump SFC mount seat.
EFFECT: fast and high-quality operation in hydrofrac, testing and development.
1 dwg
