Slotted Casing Pipe
Slotted Casing Pipe for Oil Exploration
Casing Slotted Pipe
- Outside Diameter (O.D.):
- Casing: 4 1/2″ – 20″ (114.3mm – 508mm)
- Tubing: 1.05″ – 4 1/2″ (26.7mm – 114.3mm)
- Length:
- R1: 4.88 – 7.62M
- R2: 7.621 – 10.36M
- R3: 10.36 – 14.63M
- Wall Thickness (W.T.): 0.205” – 0.875” (5.21mm – 22.22mm)
- Product Standards: API 5CT, BS EN ISO11960, NFM87-207, JIS G3439, ISO 4270, GOST 632-80
- Material Grades: H40, J55, K55, N80-1, N80Q, R95, L80-1, L80-9Cr, L80-13Cr, C90, T95, C110, P110, Q125
Thread Types
- Casing: STC, LTC, BTC, etc.
- Tubing: NU, EU, XL, PH-4, PH-6, LTC, STC, BTC, etc.
Introduction
Slotted casing pipes are essential in oil exploration for sand control, enhancing well integrity, and increasing the stability of the well. Various slot types and patterns are used to optimize performance based on the specific conditions of the oil well.
| API Casing | ID mm |
Length m |
Slot Length mm |
Slot No.No./m
|
Slot width mm
|
Slot Tolerance
|
Valid Filter Area cm/m
|
Max. Strength KN
|
||
| Spec mm |
Thickness mm |
Per Weight kg/m |
||||||||
| 60.32 | 5 | 6.84 | 50.3 | 3
|
80
|
200 | 0.3
|
±50
|
48 | 512.54 |
| 73.02 | 5.5 | 9.15 | 62 | 240 | 57.6 | 688.55 | ||||
| 88.9 | 6.5 | 13.22 | 75.9 | 280 | 67.2 | 995.1 | ||||
| 101.6 | 6.5 | 15.22 | 88.6 | 300 | 72 | 1151.2 | ||||
| 114.3 | 7 | 18.47 | 100.3 | 10
|
320 | 76.8 | 1400.4 | |||
| 127 | 7.52 | 22.13 | 112 | 340 | 81.6 | 1673.8 | ||||
| 139.7
|
7.72 | 25.11 | 124.3 | 360 | 86.4 | 1900.2 | ||||
| 9.17 | 29.48 | 121.4 | 360 | 86.4 | 2232.4 | |||||
| 168.3 | 8.94 | 35.09 | 150.4 | 400 | 96 | 2672.95 | ||||
| 177.8
|
8.05 | 33.68 | 161.7 | 440 | 105.6 | 2559.2 | ||||
| 9.19 | 38.19 | 159.4 | 440 | 105.6 | 2940.7 | |||||
Specifications
API Spec 5CT – Specification 5CT/ISO 11960,GB/T 19830-2011 Specification for Casing and Tubing, Eighth Edition, Petroleum and natural gas industries-Steel pipes for use as casing or tubing for wells
Mechanical Properties:
| Group | Grade | Type | Total elongation
under load % |
Yield Strength M pa | Tensile strength
min Mpa |
Hardness | ||
| min | max | HRC | HBW | |||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 2 | J55 | – | 0.5 | 379 | 552 | 517 | – | – |
| K55 | – | 0.5 | 379 | 552 | 655 | – | – | |
| N80 | 1 | 0.5 | 552 | 758 | 689 | – | – | |
| N80 | Q | 0.5 | 552 | 758 | 689 | – | – | |
| 3 | L80 | 1 | 0.5 | 552 | 655 | 655 | 23 | 241 |
| L80 | 9Cr | 0.5 | 552 | 655 | 655 | 23 | 241 | |
| L80 | 13Cr | 0.5 | 552 | 655 | 655 | 23 | 241 | |
| C90 | 0.5 | 621 | 689 | 689 | 25.4 | 255 | ||
| C95 | – | 0.5 | 655 | 724 | 724 | – | – | |
| T95 | 0.5 | 655 | 724 | 724 | 25.4 | 255 | ||
| P110 | – | 0.6 | 758 | 862 | 862 | – | – | |
| 4 | Q125 | All | 0.65 | 862 | 931 | 931 | – | – |
Chemical Composition
| Standard | Grade | Composition（%） | ||||||||||
| C | Si | Mn | P | S | Cr | Ni | Cu | Mo | V | AIs | ||
| API SPEC 5CT | J55K55 | 0.34～0.39 | 0.20～ 0.35 |
1.25～1.50 | ≤0.020 | ≤0.015 | ≤0.15 | ≤0.20 | ≤0.20 | ≤0.020 | ||
| (37Mn5) | ||||||||||||
| N80 | 0.34～0.38 | 0.20～ 0.35 |
1.45～1.70 | ≤0.020 | ≤0.015 | ≤0.15 | 0.11 ～0.16 |
≤0.020 | ||||
| (36 Mn2V) | ||||||||||||
| L80(13Cr) | 0.15～0.22 | ≤1.00 | 0.25～1.00 | ≤0.020 | ≤0.010 | 12.0～ 14.0 |
≤0.20 | ≤0.20 | ≤0.020 | |||
| P110 | 0.26～0.35 | 0.17～ 0.37 |
0.40～0.70 | ≤0.020 | ≤0.010 | 0.80～ 1.10 |
≤0.20 | ≤0.20 | 0.15 ～0.25 |
≤0.08 | ≤0.020 | |
Slotted Types
Perforated Rectangular Slotted Trapezoid Slotted Bridge Slotted Wire Wrapped Screen Mechanical Cutting Compound Slotted Pipe Slot Types
Straight Slots
Cut at a right angle to the liner, straight slots have uniform diameter from the inside to the outside of the wall. They are cost-effective but less efficient in sand control compared to keystone slots.
Keystone Slots
Cut at a slight angle, these slots are larger on the inside than on the outside, ensuring that particles entering the slot can pass through freely, reducing the risk of clogging.
Slot Patterns
Line (Straight) Pattern
Slots are placed evenly in identical bands around the pipe, forming straight lines of slots across the length of the liner.
Single-Slot Staggered Pattern
Bands of evenly spaced slots are placed around the pipe, with slots in different bands offset (staggered) to each other. This pattern preserves the pipe’s strength and provides an even distribution of slots.
Gang Pattern (Multiple Staggered Pattern)
Similar to the single-slot staggered pattern but with two slots cut closely together at each position. This pattern withstands higher torque during installation and resists deformation under thermal load, making it suitable for Steam Assisted Gravity Drainage (SAGD) applications.
Quality Assurance
- Quality Systems: API/ISO
- Third-Party Inspections: SGS, DNV, BV, Moody
Conclusion
Slotted casing pipes are vital for preventing sand ingress, enhancing well strength, and maintaining the integrity and stability of oil wells. By selecting the appropriate slot type and pattern, operators can ensure efficient production and long-term well performance.
This comprehensive overview of slotted casing pipes provides detailed information on specifications, slot types, patterns, and quality assurance measures, ensuring a well-informed selection process for optimizing oil well performance.
A casing pipe is a hollow steel tube that is typically rammed into place through the earth by using a hydraulic or pneumatic jack. After being driven, the displaced soil is removed and the product pipe, or carrier pipe, is inserted inside the steel tube. Available Sizes Category:ERW, HFW or SMLS Standards:API 5CT PSL1/PSL2 J55,K55,N80-1,N80-Q,API 5CT PSL1/PSL2 L80-1, L80-9Cr,L80-13Cr,C90, C95, P110, Q125 Steel Grade:H40, J55, K55, N80
Slotted liner casing pipes are a vital component in wellbore applications, providing effective sand control and structural support. By selecting the appropriate slot size, pattern, type, and density, and ensuring the liner dimensions align with industry standards, operators can optimize well performance and longevity.
H40 casing steel pipes are essential components in the drilling and production of oil and gas wells. These pipes are manufactured to meet API Spec 5CT standards, ensuring quality, performance, and reliability. Through rigorous manufacturing processes, precise dimensions and tolerances, and comprehensive testing, H40 casing pipes deliver dependable performance in various drilling and production environments.
The American Petroleum Institute specification API 5CT J55 Pipe is designed for use in the oil and gas industry. API 5CT J55 is a commonly used petroleum casing pipe material. It is produced according to the API 5CT standard and used in a variety of well types, both oil and natural gas. The main purposes of using casing or tubing are to protect the wellbore from collapse and to provide a conduit for well fluids. The casing is placed in the well first, followed by tubing, which is often smaller in diameter and thus can be nested inside the casing. Both casing and tubing must be made from strong materials that can withstand the high pressures and temperatures encountered deep underground. API 5CT J55 meets these requirements and is, therefore, an excellent choice for OCTG (oil country tubular goods) applications. It is typically produced as seamless steel pipe, but can also be procured in welded form. API 5CT J55 has a relatively high yield strength and good fatigue resistance, making it an ideal choice for high-pressure, high-load applications such as petroleum products.
API 5CT K55 is a pipe grade specified by the American Petroleum Institute. API 5CT K55 is a type of well casing that is typically used in well drilling operations. The casing and tubing are OCTG (oil country tubular goods) that are used to form the walls of the well. The steel pipe is placed in the well and held in place by cement. The cement helps to protect the well from collapse and keeps the well fluids from escaping. API 5CT K55 is a popular choice for well drilling because it is durable and can withstand high temperatures and pressures.
M65 casing pipe is a crucial component in the drilling and production of oil and gas wells. It is manufactured to meet API 5CT standards, ensuring quality, performance, and reliability. Through rigorous manufacturing processes, precise dimensions and tolerances, and comprehensive testing, M65 casing pipe delivers dependable performance in various drilling and production environments.
