The perforation team at Texery Oil Technologies Inc. are in charge of setting the bridge plugs and pumpdown perforation. This technology is primarily used for shale oil & gas development. The operation typically includes perforating, setting bridge plug, hydraulic fracturing.
Equipments and downhole tools
Logging Truck
Benz logging trucks: Five units
Power: 235kw/320hp Cable lifting speed: 120m/h——11000m/h
Wellhead blowout control equipment
Blowout control equipment: Hunting 105Mpa and Elmar 70Mpa
Operation capacity: Provide services for more than 10 wells simultaneously.
High pressure capability: Used in wells at the bottom hole pressure over 95Mpa.
Downhole tool series
DYNA multi-stage ignition system: Ten sets
Type: Electronic multi-stage optional launching
Temperature rating: 175°C
Pressure rating: 140 Mpa
Perforating gun: 89mm diameters & 20 perforations/m
Bridge plug and setting tools
Fast-drilling bridge plug
Temperature rating: 121-177°C
Pressure rating: 56-105Mpa
Setting tool: Ten sets of Baker 20#
Technology Highlights
•Unified-perforation type perforating technology.
•After perforated by DPEX perforating bullet, the perforated trajectory will be cleaned automatically.
Unified-perforation type perforating bullet
Ordinary perforating bullet
Principle of unified-perforation type perforating bullet
Perforation bullet
The explosive for all the perforating bullets are the same: RDX\HMX\PYX
Different perforating bullets only differ in the design of liner and cartridge.
Unified-perforation type perforating bullet
•The design of liner angle differs from that of ordinary perforating bullet; it can control the explosive within energy collection and scattering.
•After ignition, the set flow will be in the shape of column and launched toward the ground.
Ordinary perforating bullet
•The liner design makes the explosive more energy-gathered.
•After ignition, the set flow will be in the shape of cone and launched toward the ground.
DPEX self-cleaning perforating bullet
Principle of self-cleaning perforating bullet
Perforating bullet
•The explosive for all the perforating bullets are the same: RDX\HMX\PYX
•Different perforating bullets only differ in the design of liner and cartridge
Self-cleaning perforating bullet
•Reactive metal material is adopted for the liner.
•After perforating, exothermic reaction of reactive metal material will occur in the trajectory along with the jet flow.
•After exothermic reaction, ultrahigh pressure will generate in the trajectory, so the perforating fragments will flow back to the shaft along with the fluid.
•The ultrahigh pressure in the trajectory will last for a while, so the fragments in the trajectory will be cleaned up and the trajectory will be clean.
Ordinary perforating bullet
•Inert metal material is adopted for the liner.
•After perforating, the liner will melt or be blasted into fragments.
Oriented perforating
Oriented perforating technology: It realizes the oriented perforations at different positions in a single trip. Contrast to realize the oriented perforation at a position in the past, the operator needs to run the tools in the well for three times: at the first time, set the bridge plug with locationing slot; on the second time, lower the gyroscope to measure the relative azimuth of the locationing slot; at the third time, put the perforation gun into the locationing slot to perforate the well.
Case study
Result:
The max. pumping pressure of the first stage of JY31-3HF well is 82Mpa; and no leakage was found in the Hunting 105Mpa wellhead blowout control equipment.
Since 2012, 618 wells with more than 7000 stages were implemented in JiaoshiBa oil & gas fields, Northeast oil field, Yangchang oil field, East China oil field, and Puguang oil & gas fields.
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