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Oriented perforation

Single-use oriented perforating systems of the Scorpion-ON series are designed to solve special geological and technical tasks where formation penetration is required using the self-orientation of charges at the required angle relative to a given formation interval.

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Oriented perforation

Single-use oriented perforating systems of the Scorpion-ON series are designed to solve special geological and technical tasks where formation penetration is required using the self-orientation of charges at the required angle relative to a given formation interval.

Oriented perforating systems possess all the advantages of the Scorpion series perforating systems, such as: high reliability, a wide range of charges, and simplicity and convenience of assembly and application.

Distinctive features
  • Use of special simplified blank sections in the assembly;
  • Application of the entire range of DP, SDP, SBH, BH, or GH type charges, as well as their alternation for various geological and technical tasks;
  • Use of several charge phasing options: 0°, 45°, 60°, 90°, and 180°, depending on the customer's requirements;
  • Application of a perforating system with a maximum charge installation density of up to 18 shots/m at various phasings;
  • Deployment of the perforating system on both tubing (CT) and rigid wireline logging cable.
Characteristics of Scorpion series perforating systems with a self-orientation mechanism
Parameter Value
Scorpion 73 Scorpion 89 Scorpion 102 Scorpion 114
 Outer diameter, mm        
  -  without installed centralizers       73         89         102         114  
  -  with installed centralizers       102         113         131         138  
 Minimum casing drift diameter, mm                
  -  without installed centralizers       88         106         119         143  
  -  with installed centralizers       112         123         141         148  
Maximum allowable operating temperature, when held for 1 hour, °C  (170-200)±51) 
Maximum allowable hydrostatic pressure, MPa  80-1402) 
Maximum carrier diameter after perforator firing, mm:  
in a liquid environment 79 95 108 120
in a gas environment 83 99 112 124
 Section length, m        1/2
Maximum length of a multi-section perforator assembly, m:  
on wireline Limited by the cable load capacity
on tubing Limited by the load capacity of the firing head and plate
Maximum length of blank sections 6
Minimum deviation angle, deg. 30
Orientation accuracy, deg. ±5
Perforation direction, phasing, deg. Up 0, horizontal 180, down 0, down 60, down or up 453)
Maximum perforation density, shots/m 18 14

1) The maximum allowable operating temperature and holding time of the loaded perforator are determined by the operational documentation for the EM (explosive materials) having the lowest allowable application temperature compared to the other EMs included in the explosive train of the perforator, as well as by the characteristics of the rubber products used.

2) The maximum allowable pressure may vary depending on the mechanical properties of the carrier tubes.

3) Any phasing is possible by special order.         
Characteristics of the applied shaped charges
Perforator name Shaped charge name Charge type Total explosive mass in the charge, g Perforation density
shots/m/
phasing, deg.		 Average parameters of charge penetration performance into a QC-type composite target, mm
Penetration depth Entrance hole diameter
Scorpion 73 Scorpion PP-20DP DP 14.3-16.8 18/
0, 45, 60, 90, 180		 750 11
Scorpion PP-20SDP  SDP 950 10
Scorpion PP-20BH  BH 17.3-19.8 380 17.5
Scorpion PP-20SBH  SBH 18.3-20.8 210 21.5
Scorpion 89 Scorpion PP-25DP DP 25.3-27.8

18/
0, 45, 60, 90, 180		 1000 11
Scorpion PP-25SDP  SDP 1200 10
Scorpion PP-25BH  BH 600 20
Scorpion PP-25SBH SBH 24.3-26.8 250 23
Scorpion PP-25GH  GH 25.3-27.8 600 16
Scorpion 102 Scorpion PP-32DP DP 25.3-31.8 18/
0, 45, 60, 90, 180		 1100 11
Scorpion PP-32SDP   SDP 29.3-31.8 1300 10
Scorpion PP-32GH  GH 31.3-33.8 700 17
Scorpion PP-32SBH  SBH 24.3-26.8 210 25
Scorpion PP-36SDP SDP 37.3-41.3 14/
0, 45, 60, 90, 180		 1600 12
 Scorpion PP-36GH GH 35.3-37.8 1000 15
Scorpion 114 Scorpion PP-32DP DP 25.3-31.8 18/
0, 45, 60, 90, 180		 1100 11
Scorpion PP-32SDP  SDP 29.3-31.8 1300 10
Scorpion PP-32SBH  SBH 24.3-26.8 210 25
Scorpion PP-36SDP SDP 37.3-41.3 14/
0, 45, 60, 90, 180		 1600 12
 Scorpion PP-36GH GH 38.8-41.3 1000 15

1) Depending on the explosive material used in the charge.
Phasing and layout
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