FRACline® ASSEMBLY

Perforating-explosive equipment set for preparation of hydrofrac stages according to Pumpdown Perforating or Plug-and-Perf technology is presented in FRACline® assembly with the TPP sequence perforation tandem sub as a main component providing for one-by-one sequence initiation of each separate carrier or group of carriers starting with installation of a bridge plug for isolation of the underlying hydrofrac zone. As a result, cluster perforation is carried out when several intervals are perforated for one trip.

Specific Features

• No additional initiating means are required; each tandem sub has initiating devices such as PVPD-N available at the RF market;
• No complicated ground equipment is required – initiating electrical pulse is coming either from standard PVP or PVV-1 device;
• Delay time for carrier actuation is controlled by the operator;
• Number of carriers with length from 0,5 to 6 m with sequence actuation is limited by wireline load capacity and lock chamber of the lubricator but can not be more than 7 pieces;
• TPP tandem sub design is protected by the patent №2646927 RF.

TPP-TOR Specific Features

• Perforaon on wireline per one round trip is possible during standard explosive-perforang works and works with the use of Plug-and-Perf;
• High safety, easy assembly and minimizaon of the human factor due to the use of TOR-200E wireless electrical detonators without iniang explosives;
• Sequence iniaon is provided by alternate arrangement of assembly tandem subs of different colour (red and blue) marking.
• The operator carries out alternate iniaon of each sequence carrier by current pulse supply of direct or reversed polarity. Iniaon is carried out with PVZ-1700-2,3 or a similar one;
• Reducon of the assembly total length and weight during perforaon of a big number of clusters per one round trip due to the 17% reduced length of the tandem (compared with TPP);
• Higher reliability due to shorter detonaon chain (compared with TPP) – no detonang cord and booster charge;
• For standard explosive-perforang works the reusable XX-TOR switching the boom sub to the mode of pulse transfer to the detonator is installed in the boom part of the assembly.

Unified Designation System of FRACline Arrangement for Preparation of Hydrofrac Stages

FRACline arrangement X-0(M)-YxS-N-L-FP-P, where:

• X– number of hydrofrac stages
• 0 (M) – zero stage is required, M – interval length, m
• BO– no zero stage (hydrofrac collar)
• YxS – diameter and thickness of liner wall
• N– number of clusters (perforaon intervals)
• L – cluster (perforaon interval) length
• FP – plug type
• P – residual well-mouth pressure, atm

Arrangement Opon with 17 Stages of Mulstage Hydrofrac

17-0(2)-114x6,35-3-2,0-RP1-200 FRACline arrangement, where:

• 17 – number of hydrofrac stages
• 0(2) – zero stage is required, explosive-perforang works for 2m interval
• 114x6,35 – diameter and thickness of liner wall
• 3 – number of perforaon clusters
• 2,0 – cluster length, m
• RP1 – soluble plug, type 1
• 200 – residual well-mouth pressure

FRACline arrangement set consists of the following components (sample, top-down):