SET OF EQUIPMENT FOR MULTI-STAGE HYDRAULIC FRACTURING Russian patent published in 2022 - IPC E21B43/10 E21B43/267 E21B23/00 E21B33/12 E21B33/128 E21B33/14 E21B34/06 E21B34/10 E21B17/10 

FIELD: oil and gas equipment.

SUBSTANCE: invention relates to oil and gas equipment, in particular to well completion equipment, and can be used as part of a combined production string in multi-stage hydraulic fracturing (MSHF) operations. A set of equipment for MSHF of a horizontal well by running in one combined casing string includes: a self-rotating casing shoe for equipping the bottom of the casing string in order to orient it when lowering it into the well; a float sleeve with a check valve having a non-ferrous metal spring and an elastomeric seal to equip the bottom of the casing string; circulation valve for hydraulic fracturing; at least one hydraulic clutch for hydraulic fracturing, in the body of which there are circulation windows and a shutter is placed, fixed with shear screws; at least one ball clutch controlled for hydraulic fracturing, in the body of which there is a shutter fixed with shear screws, while in the body and the shutter there are circulation windows; at least one fracturing packer; a polished funnel for seating a floating liner sealing device, equipped with a female thread, connected to a lower sub equipped with a pin thread; stop pipe for sleeve cementing; a packer for collar cementing, in the body of which clips are installed, between which a collar is installed; a cementing sleeve for hydraulic fracturing, in the body of which an opening bushing and a closing bushing are placed; the device for sealing the liner is floating, consisting of a guide shoe connected to the body, on which three sections of collar blocks of four chevron packs are installed.

EFFECT: reducing the time of work and putting the well into operation.

3 cl, 13 dwg