FOB Price
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Minimum Order
Localité:
-
Prix de commande minimale:
-
Commande minimale:
-
Packaging Detail:
wooden pallets or as customer's request
Delivery Time:
15-20 days
Supplying Ability:
10000 Piece per Month
Payment Type:
-
Personne àcontacter Ms. Yuki
17- B of Van Metropolis No. 35 Tangyan Road, Xian, Shaanxi
Drill Collar
1. Size: as customer's request
2. Standard: API
9. Certification: ISO***1, API
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 ***5H.
Processing and thermal treatment of deep holes: Thermal treatment is conducted over the whole length of the products. Its Brinell hardness ranges between **5 and **1. And impact energy of its Charpy V shaped notch can be *0 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.
