Selective hydraulic fracturing assembly in horizontal wells

摘要

The proposed utility model relates to the oil and gas industry and is intended for hermetic isolation of intervals of oil and gas wells, with the possibility of pumping solutions and maintaining excess pressure in both directions. The objective of the proposed technical solution is to increase the reliability of multistage hydraulic fracturing in wells with horizontal ends due to hermetic isolation separate intervals, with the possibility of injecting solutions for the assembly and maintaining the excess pressure in both directions. The purpose of this utility model is to develop an assembly device for selective hydraulic fracturing in wells with horizontal completion, the activation of which occurs after lowering the tubing on the tubing lift a plug using a transport hub ... Hydraulic fracturing is injected through a transport device that passes directly through the entire body and protects the plug body from the abrasive effect of the gel-proppant mixture. After hydraulic fracturing, the transport device is removed from the plug, and the check valves are closed. Once the adapter has exited BittFrac, re-login is not possible. For the next interval, the working cycle for the trip of the plug, activation and hydraulic fracturing is repeated using a new transport node. Each time the newly stimulated interval remains isolated until the completion of hydraulic fracturing and drilling out of all deflated plugs. Before development, all installed plugs are drilled out. At all stages of the work, it is assumed that workover is used, without the use of a coiled tubing complex. The novelty and innovation consists in the technological solution of delivery to the target interval and the use of easily drilled plugs to ensure the separation of open intervals and perform selective hydraulic fracturing. Potentially candidates can be all wells with lowered assemblies of Ø114 mm with single or multiple-action hydraulic fracturing collars for opening-closing after completing the preparation of the horizontal part of the well (the requirement for a "equal" section - with a 95 mm bit).