Perforating Gun

Perforating Gun


Perforation is an extremely important technique in petroleum exploration and recovery engineering, a major means of enhancing the recovery factor of gas and oil wells and also a typical method of tapping the potential of existing oil fields and increasing output. Perforation completion is widely used in China and abroad and accounts for about over 90%of all well completions. Almost all reservoir beds can be opened by this method. In the method  in the course of gas and oil field exploitation the production casing is lowered and cemented  and then special perforation instrument and devices are sent down to the predetermined depth and aimed at the target layer. The perforator down in the well is ignited from ground and the  the lined cavity charge is ignited which result in the detonation wave  to transmit forward at a velocity of 7~8 kmper second and high temperature and high pressure shock waves are generated which penetrate though the casing, cement sheath and enter the stratum forming a hole canal, as illustrated by the diagram. Whichever perforation method you use, the performance and quality of the perforating gun shall have a significant influence on the perforation quality of gas and oil wells.

Through Tubing Perforator（TTP）
Description
The through-tubing swing jet perforator is designed to perforate in WCP. It can convey big charges through tubing to producing formation. Then the releasing detonator is detonated by an electric current to unlock the trigger, and charges swing out to be normal to axis of guns. In this case the formation could be perforated with big charges.

Benefits / Capabilities
Can re-perforate in old well without pulling the tubing out.
Can be used with big charges to achieve deeper penetration.
Firing circuitry is in short before the charges are released.

Specifications
No.
Type
OD(mm)
Casing size
1
ST43TTP9
43
1 11/16”
2
ST51TTP12
51
2”
3
ST54TTP15
54
2 1/8”
4
ST63TTP18
63
2 1/2”


Fracturing Perforator
The fracturing perforator combines perforator and propellant in one single operation. When the charges are detonated, the high temperature would ignite the propellant, result in two more high pressure wave, contentiously impact the stratum and create short fractures near the perforation tunnel. This could achieve the purpose of improving the permeability of stratum. There are two types: Intergraded type and Sleeve type.

Feature and Benefits
Improved production or injectivity
Pre-acid or hydraulic fracturing treatment
One type of stimulation treatment

Specifications
No.
Perforator Type
O.D.
(mm)
Depth
(mm)
Fracturing
Width
(mm)
Casing Size
(g/Shoot)
Temperature Rating
(℃/48h)
1
ST73SK86
86
≥400
≥120
127
160
2
ST86SK102
102
≥450
≥140
140
160
3
ST102SK117
117
≥550
≥170
177.8
160
4
ST114SK130
130
≥650
≥190
177.8
160


Scalloped Gun
We research and manufacture various types and sizes Scalloped Gun perforators that include Scalloped Gun, StimGun, Fullbore and horizontal well perforator.
We could provide all the auxiliaries of perforator such as top sub, tandem, bull plug etc.
We research and manufacture all the explosives for perforating.

Specifications
No.
Type
O.D.(mm)
1
ST51SK7
51
2
ST60SK9
60
3
ST68SK12
68
4
ST73SK16
73
5
ST83SK25
83
6
ST86SK25
86
7
ST89SK25
89
8
ST102SK32
102
9
ST114SK35
114
10
ST127SK35
127
11
ST102SK45
102
12
ST121SK45
121
13
ST127SK45
127
14
ST178SK45
178

Horizontal Perforator
Oriented perforators orient accurately. There are two type: external orienting and internal orienting, Sizes are available on request. The operation is sale and reliable.

Specifications
No.
Type
O.D.(mm)
Shot Density
Oriented Accuracy(*)
Pressure Rating (MPa)
Deflection
(* / m)
1
73SH
Ф73
10-18
±5
105MPa
30/60
2
83SH
Ф83
10-18
±5
140MPa
30/60
3
86SH
Ф83
10-18
±5
140MPa
30/60
4
89SH
Ф89
10-18
±5
140MPa
30/60
5
102SH
Ф102
10-18
±5
105MPa
30/60
6
114SH
Ф114
10-18
±5
105MPa
30/60
7
127SH
Ф127
10-18
±5
105MPa
30/60



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