Supplying API casing drilling tools 4 inch pipe drill collars for sale

Drill Collar API connections are regularly inspected during and after the machining process for thread profi le,lead, depth, taper and stand-off . Collars are generally manufactured slick, but can also be spiraled or fl exed based on specifi c needs. Short or Pony Collars are also available as slick or fl exed.

Non-magnetic drill collars won’t interfere with specialized electronics found in directional drilling applications. Drilling Tools off ers non-magnetic drill collars that are constructed from 4145 alloy steel,heat treated to API standards with OD sizes ranging from 3 1/8” to 11”.The standard non-mag drill collar is 31’ and IDs range from 1 1/4” – 4”. For corrosive resistance shot peening is available, and for OD or ID protection, hard-banding can be applied. Collars are machined on one of Drilling Tools’ manual or CNC machines with premium cutting tools.

Features:

• ODs from 2-7/8" to 14"
• Slick or spiral
• Mechanical properties guaranteed to 1" below the steel's surface at ambient temperature
• Enhanced fatigue resistance (threads cold rolled, pin-relief groove and box bore back for API  connections)
• Phosphate-coated threads to prevent galling
• Slip & elevator recess
• API stress-relief and bore back
• Hardbanding and internal plastic coating upon request
• Proprietary connections optional
• Pressed steel thread protector

More products

 Integral spiral stabilizer                       Shale shaker                              Desander

Puyang Zhongshi Group Co., Ltd is a professional manufacturer of various oilfield equipments and cementing accessories since 1997, restructured enterprise of SINOPEC. We have the certificates of API 5CT, API 10D, API 11E, API 6A, API 11AX, ISO 9001 and ISO 14001, etc..
Our group have more than 10 years export experience and 9 subsidiary factories, more than 500 employees. We are the first-class supplier of resources market of SINOPEC and CNPC. Our foreign customers are mainly from America, Central Asia, Russia, Southeast Asia, Middle East, etc.