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Puyang Zhongshi Group Co., Ltd.

Drill Collar, Non-Magnetic Drill Collar, Drilling Collar manufacturer / supplier in China, offering API 7 Oil Well Drilling Spiral Non-Magnetic Drill Collar, API 10d Non Welded/One Piece/Integral Straight Bow Casing Centralizer, Factory Directly Supply Oilfield Pumping Unit and so on.

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Supplier Homepage Product pipe API 7 Oil Well Drilling Spiral Non-Magnetic Drill Collar

API 7 Oil Well Drilling Spiral Non-Magnetic Drill Collar

Purchase Qty.:
(Pieces)
1-49 50+
FOB Unit Price: US $10,000 US $1,000
Purchase Qty. (Pieces) FOB Unit Price
1-49 US $10,000
50+ US $1,000
Get Latest Price
Port: Qingdao, China
Production Capacity: 1000pieces/Month
Payment Terms: T/T, Western Union

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Basic Info
  • Model NO.: Non-magnetic Drill Collar
  • Standard: API 7
  • Use: Oil Well Drilling
  • Transport Package: Iron Frame Packing
  • Origin: Henan, China
  • Size Range: 3 1/8"--11"
  • Material: Alloy Steel
  • Trademark: Zhongshi
  • Specification: API, ISO
  • HS Code: 8431
Product Description
Product Description

API 7 Oil Well Drilling Spiral Non-Magnetic Drill Collar

1) Standard: API Spec 7
2) API and ISO certified
3) Specification:  3-1/8'', 3-1/2'', 4-1/8'', 4", 4-3/4'', 5'', 6" 6-1/4", 6-3/4", 7", 7-1/4", 7-3/4", 8", 8-1/4", 9", 9-1/2", 9-3/4", 10", 11"
4) Material:  Alloy Steel
 
5) Description

A drill collar is a device used in the drilling of oil wells for weighting the drill bit, enabling it to drill through rock. It is a bar made of solid steel, either plain carbon steel or a non-magnetic steel alloy, drilled lengthwise to permit the passage of drilling fluids. A drill collar forms the lowest element of a drill string, which encompasses all the elements of a down-hole process from the surface to the rock bit.
 
6) Structure

These devices are typically 31 feet (about 9.45 m) long and threaded at both ends, male at one end and female at the other, to allow multiple drill collars to be joined above the bit assembly.
 
The number of drill collars attached to a drill string will depend upon the material composition of the strata at the drill site and the likely depth of the well. A relatively shallow well with less dense geologic structure through which the bit must pass will require fewer drill collars than a deep shaft through dense material.
 
Typically, drill collars will be consistent in length but may vary in diameter, and their outside configuration may be slick or spiral. The outside diameter may vary from about 3-1/2 inches (8.89 cm) to 11 inches (27.9 cm) and greater. The reference to slick or spiral outer configuration refers to the machining of the outside surface of the collar.
 
7)  Characteristic of Non-mechanical Drill Collar
 
Materials of Non-magnetic drill collars are made from chrome manganese low carbon austenitic alloy, which has following characteristic:
a. The chemical composition should be controlled strictly during the refining and forging process.
b. With excellent lower Magnetic permeability, high strength of mechanical properties and outstanding resistant to stress corrosion cracking and no tendency to galling.
 
8) Parameter

Type
OD(mm)ID(mm)
L(m)
±152.4mm
d

DF(mm)    
±0.4

NC23-31
79.431.89.1476.2
NC26-3588.938.19.1482.9
NC31-41104.850.89.14or9.45100.4
NC35-47120.650.89.14or9.45114.7
NC38-5012757.29.14or9.45121
NC44-60152.457.29.14or9.45144.5
NC44-60152.471.49.14or9.45144.5
NC46-62158.857.29.14or9.45149.2
NC46-62158.871.49.14or9.45150
NC46-65165.157.29.14or9.45154.8
NC46-65165.171.49.14or9.45154.8
NC46-67171.457.29.14or9.45159.5
NC50-70177.857.29.14or9.45164.7
NC50-70177.871.49.14or9.45164.7
NC50-72184.271.49.14or9.45169.5
NC56-77196.871.49.14or9.45185.3
NC56-80203.271.49.14or9.45190.1
6-5/8REG209.671.49.14or9.45195.6
NC61-90228.671.49.14or9.45212.7
7-5/8REG241.376.29.14or9.45223.8
NC70-97247.676.29.14or9.45232.6
NC70-10025476.29.14or9.45237.3
8-5/8REG279.476.29.14or9.45266.7
NC50-67171.571.49.14or9.45159.5

9) Mechanical Property
 

OD Size

Yield Strength
σ0.2
Mpa(psi)

Tensile Strength σb
Mpa(psi)

Elongation
δ4%

Reduction of area
%

Reduction of area
%

3-1/8~6-3/4

≥758
-110,000

≥827
-120,000

≥18
50≥50
7~10
≥689
-100,000

≥758
-110,000

≥20


Company Information

Puyang Zhongshi Group Co., Ltd is a professional manufacturer of various oilfield equipments and cementing accessories since 1997, restructured enterprise of SINOPEC. 
 
We have the certificates of API 5CT, API 10D, API 11E, API 6A, API 11AX, ISO 9001 and ISO 14001, etc..  
 
Our  products mainly include: 
 
1. Casing Centralizer                          2.  Float Collar & Float Shoe 
3. Cementing Plug                              4.  Cementing Head
5.  Cement Basket                              6.  Tubing Pump / Rod Pump
7.  Valve Ball & seat                            8. Casing / Tubing Pipe and Coupling
9. Stage Collar                                    10. Pumping Unit
11. Air Blaster                                      12.  Sucker Rod
 
Our group have more than 10 years export experience and 9 subsidiary factories, more than 500 employees. We are the first-class supplier of resources market of SINOPEC and CNPC.  Our foreign customers are mainly from America, Central Asia, Russia, Southeast Asia, Middle East, etc.


Contact Us

PUYANG ZHONGSHI GROUP CO.,LTD

Add: 5th community, Zhongyuan Oilfield, Puyang, China

Tel: 0086-371-87096211

 

Website: www.zs-oilfieldequip.com;
                 www.chinajixie.com
                 www.casingcentralizer.com

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