Spiral Drill Collar Made Of Aisi 4145h Steel - China

Drill collar is made of AISI 4145H steel, which the special

steel of each chemical element control is quite tight, after

a medium frequency induction heating quenching and

tempering, from 1 "below the surface of tube body can ensure

the brinell hardness of 285-341 - hb.

Charpy impact energy

reaches more than 54 j.

Spiral Drill Collar

Spiral drill collars are widely used because its own

features, the special spiral drill collar can reduce the

contact area of wall and pipe body, thereby avoiding the

phenomenon of "sticking" of the drill string.

Type A (cylindrical) : using ordinary alloy steel

manufacturing, the tube is circular cross section inside and

outside the drill collar.

Type B (spiral) : using ordinary alloy steel manufacturing,

pipe surface with spiral groove drill collar in vitro.

C (no magnet) : with very low permeability of stainless

steel manufacturing, pipe body inside and outside all is

circular cross section of the drill collar.

Material: AISI 4145H MOD

The hole diameter: 101 mm

Application: oil drilling

Outer diameter : 101.6-117.5 120.6-142.9 146.0-168.3

171.4-219.1 ≥222.2

Depth of elevator

slot+-0.2 : 5.6 6.4 7.9

9.5 11.1

R1: 3.2+-0.4

4.8+-0.8 6.4+-0.8

Angle: 4° 5° 6°

7.5° 9°

Depth of slip

groove=-0.4: 6.4

6.4 6.4

Angle: 5°

5° 5°

top hole-0.8: OD-7.9 OD-9.5 OD-12.7

OD-14.3 OD-15.9

bottom hole+1.6: OD+3.2

OD+3.2 OD+3.2

Elevator slot depth and the size of the slip groove depth

according to the nominal outer diameter of the drill collar

Angle is reference and approximation

Radius cold machining

Company Contact:

• Posted By: JIYUAN HUAZHONG METALLURGICAL MACHINERY CO.LTD

• Phone: 03916080816

• Address: Jiyuan City Henan Province of China Mainland, Jiyuan , China

• Email:

• Business Description: JIYUAN CITY HUAZHONG METALLURGICAL MACHINERY CO.
  
  LTD is located in Jiyuan
  
  City Henan Province of China Mainland, created in 2006 with the
  
  registered capital RMB 5 million.
  
  Nowdays it has grown as a middle
  
  export enterprise which operates metallurgical spare parts, machining,
  
  steel products and forging so on.
  
  We have heat treating and machining workshops with the variety of equipments.
  
  Such as, box type resistance furnace, pit type resistance furnace, the domestic advanced double medium frequency quenching machine handling the maximal workpiece diameter of 600 mm, the maximal workpiece length of 5000 mm in heat treating workshops .
  
  In mechanical processing workshop with strong mechanical processing capacity, there are a variety of large and medium and heavy duty lathe, deep hole drilling and boring machine, CNC gantry milling machine, horizontal boring machine, grinding machine, sawing machine and a series of heavy machinery processing equipment.
  
  There are many senior technicians , experienced technical personnel and management personnel.
  
  The products we could manufacture include forged steel roller, leveling rolls, corrugated roller and pipe mould so on as per the customer s specific requirements.
  
  Our aim is to use our service and sincere exchange for your trust and supports, Quality and credibility are the most basic concepts to build our brand and create mutual benefit and win win situation.
  
  
  
  We are willing to sincerely cooperate with all the colleagues home and abroad in order to create a better future.