Drill Collar Delivered to Australia
What is the difference between HWDP and drill collar?
Spiral Drill Collar Delivered to Australia Successfully
RFQ of drill collar is received from our client in Australia. After 10 days technical discussion, our client signed contract successfully. After 20 days production, drill collars were delivered to Shanghai port. With the help of our freight forwarder, drill collars has left Shanghai port and gone to Australia to serve oil well drilling operations.
The specifications are as per below,
6 ¾” SPIRAL DRILL COLLARS. Length will be 31 feet and ID will be 2 ¼”, AISI 4145 H,
Box-up & Pin-down API NC-50
Pin and Box connections must be equipped with Stress Relief Features
Cold working of thread roots (Pin and Box) must be performed.
Gall-resistant treatment of zinc or manganese phosphate shall be applied to the threads and sealing shoulders of all end connections of drill collars.
All joints to be supplied with Slip Recess groove ONLY
Radii at the upper shoulder on slip recess must be cold rolled
The surface finish, linear straightness, roundness and O.D. tolerances conform to API specification 7 (Latest Edition).
Drill collars are extremely heavy-duty industrial tubular used to drill into the ground and are used in conjunction with drill pipe. While drill pipe makes up the majority length of a drill string, drill collars make up only a small amount. For example: a 10,000ft drill string may be comprised of 9,000ft of drill pipe, and only 500ft of drill collars. Much like drill pipe, drill collars are made in 31ft lengths and are screwed together vertically on the drilling rig.
Drill collars are usually constructed from thick-walled carbon steel, but can also consist of nonmagnetic copper, steel or other metal alloys. In contrast, to drill pipe, drill collars are thick-walled and heavy, with very limited flexibility. Drill collars are used at the bottom of the drill string, just above the drill bit. They are used mainly for weight on the drill bit but also work as a shock absorber to dampen the vibrations and impact forces caused by drilling. There are two main types of drill collars, slick or spiral grooved, however, both styles accomplish the same task. Spiral groove drill collars were introduced in more recent years and are thought to help prevent the drill string from getting stuck in the hole by allowing drilling debris and lubricant to pass more freely around the drill collar. Drill collar is different from drill pipe.
If you are looking for drill collar manufacturer in China and need drill collar with low price, high quality and fast delivery made in China, kindly send us your enquiry to sales@sinomechanical.com. And we will get back to you within 24 hours.
