Hebei, China
Business Type:
Manufacturer/Factory
Registered Capital:
3000000 RMB
Plant Area:
501~1000 square meters
Management System Certification:
ISO 9001
Average Lead Time:
Peak season lead time: within 15 workday
Off season lead time: within 15 workday
Sample Available

Used Drill Collar, Drill Equipments, Drilling Machinery manufacturer / supplier in China, offering API Oil Drilling Tool Threaded Used Drill Collar in Stock, 9 5/8 Inch Milled Tooth Tricone Drill Bit for Sale, API 8 3/4" Steel Tooth Oil Driling Tricone Bit and so on.

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Supplier Homepage Products drill pipe and drill collar API Oil Drilling Tool Threaded Used Drill Collar in Stock

API Oil Drilling Tool Threaded Used Drill Collar in Stock

Get Latest Price
Min. Order / Reference FOB Price
1 Piece US $500/ Piece
Port: Tianjin, China
Production Capacity: 300 Pieces for Each Day
Payment Terms: L/C, T/T, Western Union
Logo Printing: Without Logo Printing
Size: Large
Customized: Non-Customized
Type: Used Drill Collar
Material: Stainless Steel
Certification: API

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Basic Info

Model NO.: used Drill Collar
Color: Blue
Application: Well Drilling
Brand Name: Lockheed
Trademark: Lockheed
Transport Package: Wooden Box
Specification: api certification
Origin: Hebei
HS Code: 843143100

Product Description

) 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) 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

 

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