- Metal Casting Machinery[7]
- Metal Processing Machinery Parts[10]
- Cast & Forged[10]
- Metallurgy Machinery Parts[2]
- Other Metal Processing Machinery[10]
- Rolling Mill[7]
- Metal Straightening Machinery[4]
- Other Metallurgy Machinery[9]
- Mining Machinery Parts[7]
- Other Machinery[1]
- Industrial Furnace[2]
- Crusher[5]
- Contact Person : Ms. Wong Lisa
- Company Name : Zhengzhou Hengzhong Heavy Machinery Manufacturing Co., Ltd.
- Tel : 86-371-64100199
- Fax : 86-371-64100299
- Address : Henan,Gongyi,Economic Development Zone, Zhitian town, Gongyi city, Henan province, China
- Country/Region : China
- Zip : 451200
Oilfield standard slick drill collar
Oilfield standard slick drill collar
Specification for reference
Product Type:
A. Slick Drill Collar: mainly used to provide bit weight to drill bit so that drill pipe is in tension
B. Spiral Drill Collar: used to reduce contact area with hole so as to avoid efficiently bit sticking from differential pressure
C. Spiral Drill Collar With Elevator Groove And Slip Groove: used as lifting sub and safety slip when trip out. The technical parameters for elevator groove and slip groove is as per API SPEC7_1. Hard banding is optional at customers' request
D.Non magnetic Drill Collar: cold rolled finish on both ID and OD surface with unique technical process strengthen the structure and ensures the tools with optimal resistance to stress, corrosion & cracking
Main Features:
Materials: structure steel alloy forged or rolled from AISI 4145H.
Processing and thermal treatment of deep holes: Thermal treatment is conducted over the whole length of the products. Its Brinell hardness ranges between 285 and 341. And impact energy of its Charpy V shaped notch can be 40 ft lb at a temperature of 1 inch below the surface of the pipe.
Testing procedures: Testing of surface dimensions and ultrasonic wave and magnetic particle testing over the whole length of a product will be included.
Cold forming of thread bases:Cold rolling must be done for the bolt root and elevator recess of a drill collar. Thus, the bearing capacity of the upper radius will be increased via reducing crack diffusion to increase fatigue strength of a drill collar and extend the service life.
Phosphating or brass plating:Phosphating or brass plating will be conducted for all screw threads to increase their corrosion resistance and avoid thread jamming of drilling tools.
Screw thread protector: Steel or plastic-steel ring thread protectors are provided for protecdion.
Oilfield standard slick drill collar
