API Spec7 Oilfield Spiral Drill Collars Weights

Product Description

Oil Well Drilling Parts API Spec7 Oilfield Spiral Drill Collars Weights

Product Description

Key Technical Specifications:

Material: Non magnetic steel
OD: 2 3/8" to 6 5/8"
Wall Thickness: 6.45mm to 12.7mm
Length: R1, R2, R3 (6.10m - 13.72m)
Hard band: Arnco200XT, TCS8000
Standard: API 5DP / API Spec 7-1
RSC Type: NC26, NC31, NC38, NC40, NC46, NC50, NC55, 6-5/8FH
Upset: EU, IU, IEU
Technical: Hot Rolled
Surface treatment: Blank oil painting

Non-Magnetic Drill Collar Details:

Shape: Round pipe with smooth surface and thick wall; machined screw threads at both ends.

Use: Primarily used for inspection during the petroleum drilling process.

Inspection & Test: Full traceability from raw material to final product; serial numbers die-stamped on each body. Rigorous testing at each stage.

Magnetic Permeability: Average Ur < 1.010; Magnetic Field Gradient ΔB ≤ 0.05μT.

Drill Collar Functions:

Apply necessary pressure to the drill bit.
Ensure required compression strength.
Reduce bit vibration, swing, and beating for smooth operation.
Control well deflection during drilling.

Detailed Specifications Table

Type Body Pipe Tool Joint Kg/Piece
OD (mm) ID (mm) Upset Size RSC type OD (mm) ID (mm) Chamfer (mm)
Mid End
3 1/288.957.4101.698.4NC38127.052.4116.3312
4101.665.1114.3106.4NC40133.465.1127.4370
4 1/2114.369.9127.0119.1NC46158.869.9145.3558
5127.076.2139.7130.2NC50168.376.2154.0672
6 5/8168.3114.3184.2176.26 5/8FH203.2144.3195.7964
API Spec7 Oilfield Spiral Drill Collars Weights
OD ID Length (mm) Bevel Diameter DF (mm) Bend Strength
mm inch mm inch
120.74-3/4"50.82"9150/9450114.72.58:1
158.86-1/4"71.42-13/16"9150/94501502.63:1
177.87"71.42-13/16"9150/9450164.72.73:1
203.28"71.42-13/16"9150/9450190.13.02:1
241.39-1/2"76.23"9150/9450223.82.81:1
Our Services

Manufacturing strictly according to ISO9001 standards.

Quality guarantee: Package return policy for quality issues found within one month.

Full fulfillment of contract obligations and responsibilities.

24-hour online customer service support.

Application Field

API Spec7 Drill Collar Application
Frequently Asked Questions
Q: Are you a manufacturer or trading company?
A: We are a specialized manufacturer with over 32 years of history in the drilling equipment industry.
Q: What are your main products?
A: Our main products include core barrels, casings, drill rods, drill rigs, drill collars, and various other drilling parts for mineral exploration.
Q: How do you control product quality?
A: Quality is our priority. We maintain strict inspection procedures for raw materials and final products, and we have obtained ISO9001 certification.
Q: What are your delivery and payment terms?
A: We accept T/T, L/C, Western Union, and PayPal. Standard delivery involves a 30% deposit in advance. Minimum order quantity is just 1 piece.
Q: Do you offer after-sales technical support?
A: Yes, we provide prompt technical support for all questions. We also accept product returns or replacements for any verified quality problems.
Q: Can I order a sample before a bulk purchase?
A: Yes, we accept sample orders. Please contact our service team for specific details and arrangements.
Quality Certificate and Packing

Related Products