Perforation Gun Pipe

Perforation is an extremely important technology in the petroleum exploration and development. It is usually one of means boost the recovery of coal and oil wells. In perforating operations, perforating bullets need added with perforating gun pipes or perforating gun barrels as gun carrier to squeeze perforation direction and protect oil casing in the explosion process. The requirements for its quality and performance, especially its transverse impact toughness requirements are generally strict. Steel tube for perforating gun is mainly used for producing perforating gun body in coal and oil wells. The standards and steel grade include API SPEC 5CT, 33Mn2V and 32CrMo4. Perforating gun pipe is composed of gun-barrel, spearhead, gun breech, sealing element and other gear.

  • Advantages

1. Steel tube for perforating gun is made from 25Mn2V and 32CrMo4 (30CrMo) materials. After testing, its performance, dimension and inspection all comply more than set requirements. JST products have high dimensional control accuracy and stable usefulness.

2. The proportions of cold rolled perforating gun pipe adjust a little after heat treatment and straightening, especially the pipe end diameter will produce some initial reduction. Cutting two pipe ends can solve the problem of pipe end reduction so in terms of achieve customers’ requirements for the dimensional accuracy and fulfill the requirements of technical specifications for steel tube for perforating gun.

3. The cold drawing unit of JST perforating gun pipe is configured with one φ76 perforated pipe mill, four sets of φ50 perforation units, 28 sets of 5-120 tons cold drawing machines, straightening machine, testing equipment, etc.

4. We own two professional heat treatment production lines configured with advanced heat treatment equipment, making furnace is actually equal or lower than 5℃ and ensuring stable heating hot temperature. We also configure the rotating spray air conditioning to fully guarantee water quenching uniform cooling of steel tube for perforating gun.

There are two sets of Siemens electronic control six roller straightening machine to guarantee the straightness of tubing and casing after heat treatment. 2 heat treatment production lines for perforating gun pipe can process tubings and casings with the capacity of equal or lower 13.5 m (φ114-φ406 mm) and the magnitude of equal or compared to 12.5 m (48 mm to 180 mm). The annual productions of tubing are 150,000 tons and 50,000 a whole lot.

5. Our proprietary grades allow us to offer the most effective solutions for each customer’s particular well conditions.

6. JST steel tube for perforating gun (perforating gun pipe) is manufactured to the most exacting quality guidelines. We hold a global ISO 9001 registration for our operations, which follow an uniform quality policy and apply an extensive quality management equipment.

Technical Parameters of Perforating Gun Pipe

Steel Grade JST110Q, 25Mn2V, 30CrMo, 32CrMo4, etc.
Item Allowable Deviation
Outer Diameter (mm) 0 to +0.79
Wall Thickness (mm) -10% to 12.5%·S Deviation less than 1 mm
Curvature ≤ 1.0mm/m
Outer Diameter (mm) Wall Thickness (mm)
60.32 5.0
68.5 5.50, 6.30
73.02 5.51, 7.82
83.0 9.0
88.9 6.45, 7.1, 8.0, 8.8, 9.19, 10.0, 12.0
96.0 10.0
101.6 7.0, 9.0, 9.5, 10.0, 11.0
108.0 8.0
114.3 10.0, 12.5, 13.0
127.0 9.5, 11.0, 12.5
159.0 12.0, 12.5, 13.0
178.0 12.0, 12.5

Note: D-Nominal Outside Diameter; S-Nominal Wall Thickness

Performance Control of Steel Tube for Perforating GunMechanical Properties

Grade Yield Strength (Mpa) Tensile Strength (Mpa) Ductility (%) Impact Toughness(J)10*10
Horizontal Longitudinal
110 ≥ 758 ≥ 890 ≥ 17 42 84
130 ≥ 896 ≥ 931 ≥ 15 45 90
145 ≥ 1000 ≥ 1034 ≥ 11 50 100

Note:

    • 1. When diameter of perforating gun pipe is equal or less than 73 mm, do not shock or impact.
    • 2. When diameter is more than 73 mm, do longitudinal impact.
    • 3. When the outside diameter of steel tube for perforating gun is equal or more than 101.6 mm, do horizontal impact.
    • 4. The experimental temperature is 0℃.

Attentions In oil and gas fields, perforating gun pipe is very special different from other metal structures. Perforating projectiles or explosives detonate in a certain depth underground. This results in transient high temperature and strong impact force, breaks down the shot hole location of steel tube for perforating gun, and then shots through the rock stratum or oil and gas layer to achieve the oil and gas well perforating purpose. Therefore, relevant departments have strict requirements for the use of perforating gun pipe and clearly defines that the gun pipe is always in one-time use. Once after perforating operations, steel tube for perforating gun is used as a kind of discarded product or used by downgrade.

    Payment, Packaging and Transportation
    • Customers can choose TT or LC for payment.
    • We use steel wires or steel strips to package perforating gun pipes. Pipe caps are used to protect the pipe ends.
    • Steel tube for perforating gun is transported in bulk or in containers. Customers can choose land transportation, waterway transport or sea transportation.

Founded in 1984, Jiangyin Changjiang Steel Tube Making Factory is a professional manufacturer of seamless steel pipes and perforating gun pipes in China. Our products mainly cover casing, tubing or oil pipe, line pipe, drill pipe, high pressure boiler pipe, marine pipe, cylinder tube, hydraulic prop tube, fluid pipe, structure pipe, etc. They have passed API 5CT, API 5L, API 5DP, CCS, LR, DNV, ABS, NK, BV, GL, PED, SGS, ISO9001:2000 and ISO14001:2004 certifications. JST steel tube for perforating gun has won widespread praise and recognition by customers.

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