drill collar

Drill collar is seated between drill bit and dill pipe or drill bit and heavy weight drill pipe. It is mainly used to provide bit pressure for drill b

1. standard:AISI 4145H and API Spec.7
2. Code:NCXX,IIF,REG
3. O.D:4 3/4 -11inch
4. I.D:2-3 inch
5. Lenghth:9150mm,9450mm

Material: AISI4145H
Length: 9.15m
Product: Drill Colar
Standard: API 7-1

Drill collar is mainly used to provide bit weight to drill bit so that drill pipe is in tension

1)certified by ISO9001
2)deliery time
3)high quality

drill collars are made of AISI 4145H or 4145H modified alloy steel. Its bores are trepanned from one direction with no mismatch. All drill collars ar

Drill collars are manufactured from AISI 4145H or 36CrNiMo4 modified steel, and are supplied in the" as rolled" surface finish condition. Alternativ

High-grade Alloy Structural Steel
Good Quality and Most Durable Property,Reasonable Price

4145Mod , 9150mm Length Non Magnetic Drill Collars for Oil Drilling Equipment NC26-35 </span

Drill Collar
Drill collar is mainly used to provide bit weight to drill bit so that drill pipe centralized and hole track by large rigidity.

Drill Collar is mainly used to provide bit weight to drill bit so that drill pipe is in tension. Especially drill collar can keep drill bit centraliz

API Drill Collar Spiral Drill Collar and non magnetic drill collar

Tiptop provides a full range of slick and spiral drill collars in AISI 4145H or AISI 4145H modified steel.

The drill collar is mainly used to provide bit pressure for drill bit, keeping drill pipe in tensile condition. It stabilizes the drill bit and keep w

drill pipe elevator Drill collar
Thickness: 38 - 53 mm
Grade: 12CrMo,35CrMo4,15MnV
Outer Diameter: 79.4 - 279.4 mm
Application: Drill Pipe

It's processed with three right-hand spiral grooves on the outer cylindrical surface of the circle drill collar, in order to reduce the contacting are

Spiral Drill Collar
Spiral drill collar is used to reduce contact area with hole so as to avoid efficient bit sticking from differential pressure

Material: AISI 4145H
Length: 9.15m
OD: 105mm-241mm
Standard: API 7-1

There are three models of DCS drill collar slips:S,R and L.

DERUN non-magnetic drill collars are made from non-magnetic materials with low-magnetic permeability.
API monogram, serial number, OD, ID,

NMDC /Non-Magnetic Drill Collar /Spiral Drill Collar/Slick Drill Collar for drilling projects

The production line for the processing and production of oil drilling pipe, mainly divided into three steps, using the upsetting machine.

LUHAI drill collars are manufactured strictly according to API Spec7-1 and SY5411 standard.

1)certified by ISO9001
2)deliery time
3)high sincerity

Material: AISI 4145H
Length: 9.15m
OD: 105mm-241mm
Certificate: API

Description: It's made from rolled or forged AISI4145H chrome-molybdenum steel. The content of chemical composition and microelement is controlled.

The production line for the processing and production of oil drilling pipe, mainly divided into three steps, using the upsetting machine.

AISI 4145H Mod Spiral Drill Collar is an important part of drill string, which can supply the drill bit and increase the rigidity of drill string.

All drill collars are inspected to comply with API standards and our own internal specifications.

Drilling Tool