PEGAS Technology

A technology in which fracturing is performed using steel cartridges combined with a dissolvable ball, pumped down the tubing string and liner.

Reduced well-completion time and cost. Retrievable collets allow the landing seats to be removed in a single trip without milling, saving dozens of hours of workover-crew time and cutting costs. According to industry practice, time savings can reach 60% compared with milling out the seats.
Full-bore liner cross-section. After the collets are retrieved, the wellbore is free of local restrictions and throttling effects, which improves flow hydrodynamics and reduces the risk of complications in further operations.
Flexibility and the option of repeat operations. The retrievable design makes it possible to perform repeated fracturing or other treatments of selected intervals without a major workover or drilling new bores.
Lower risk of technological complications. Eliminating seat milling minimizes the risks of tool sticking, metal cuttings entering the formation and drilling-fluid losses, which would degrade the reservoir’s filtration properties.
Unlimited number of frac stages. The technology allows an unlimited number of frac stages, which substantially increases reservoir coverage and the efficiency of reserves recovery. This approach is especially in demand at fields with a heterogeneous structure, where a differentiated approach to stimulating individual interlayers is required.

Multistage fracturing in horizontal wells. The main application: activation of sequential frac ports with balls and subsequent retrieval of the landing seats with a collet tool to prepare the well for operation.
Completion of wells with uncemented and cemented liners. The technology is applicable both in open holes and in cased and cemented intervals where selective reservoir treatment is required.
Production stimulation at mature fields. Used to restore well productivity through repeated fracturing, acid treatments or other bottomhole-zone treatment methods.
Development of fields with hard-to-recover reserves. Effective in low-permeability reservoirs, shale and tight formations, where a branched fracture network and precise control of treatment intervals are required.
Wells with complex trajectories and diameter constraints. Thanks to its compact design and retrievable components, the technology suits wells with a small liner diameter or complex borehole geometry, where seat milling is difficult or impossible.