Shanghai Unite Steel: drill collar

2013/07/19

Drill Pipe Casing Pipe and Oil Tubing at Competitive Prices

, , are our specialty. We supply quality drill pipes, standard heavy weight drill pipes, spiral heavy drill pipes, slick drill collars, spiral drill collars, non-magnetic drill collars, seamless oil casing, ERW oil casing, and oil and gas tubing at very competitive prices. All of our , , , meet the industry standards established by the American Petroleum Institute (API). As a global supplier of quality oilfield equipment to the oil and gas industry, we ship our products around the world.

Besides the drill pipes, drill collars, oil casing and tubing, and line pipes, we supply drilling rigs, workover rigs, top drives, drilling equipment, triplex mud pumps, blowout preventers, BOP control systems, solids control equipment, etc. Please visit our company website or download our comprehensive catalog to see our full line of products.

Drill Pipe and Heavy Weight Drill Pipe

Our are in accordance with API Spec 5D and our are in accordance with. We supply full API size range of drill pipe and heavy weight drill pipes from 2-3/8 to 6-5/8 inches. Our heavy weight drill pipes include integral heavy weight drill pipes and welded heavy weight drill pipes. The steel grades of our drill pipes include E75, X95, G105 and S135. In addition, we can add hardbanding and internal coating by request. We also sell various tool joints and drill stem accessories including pup joints, lift subs, crossover subs, and reamers etc.

Drill Collar and Non-Magnetic Drill Collar

Drill collars are made with material AISI 4145H in accordance with API Spec 7-1. We supply slick drill collars and spiral drill collars; their sizes are from 3-1/8 to 11 inches.

Contact Us:

Email: chuckyan@gaslinepipe.com

Skype: chuck.yan1

2013/06/26

Standard Drill Collar

Drill collar are extra-heavy integral tools used to concentrate weight onto the drill bit so as to produce sufficient force for the drill bit to break rock efficiently while drilling. They are made of AISI 4145H modified steel and are connected between drill pipes and drill bits.

Introduction:

Drill Collar are one of the parts of a drill’s string. Drill for the Collars is meant to provide weight for drilling purposes. Drill collar has bars of solid steel that are drilled from one end to the other to provide a passage for pumping the drilling fluids through the collar.

Application:

Quality Standard: API Spec. 7/7-1, API RP7G

Size Range:

OD 3 1/8″ – 11″
Length: The standard drill collar length is 31′ 6″ . For outside diameters larger than 4″, slip or elevator recesses can be cut according to API-recommended practice RP7G. Connections are cut with standard API relief features, cold rolled and kemplated.

Features and Benefits:

API Boreback Box Connection
API stress relieve groove pin connection
Cold Rolling Thread roots
Phosphate coated connections
A hardness range of 285 to 341 BHN and a Charpy impact value of 40 ft-lbs are guaranteed at evenly distributed 16 points in any sections at room temperature;
Connections are completed（phosphate coated）to protect them from the elements after machining and to help prevent galling upon initial make-up;
Thread roots are cold rolled on API and H-90 connections;
Pressed steel thread protectors are supplied for all drill collar that are equipped with standard connections

Protection:

Standard Pressed Steel Thread Protectors.
Cast Steel Lifting Bail Thread Protectors upon request.

Mill Test Certificates:

Issued in accordance with API 7/7-1 and API RP7G specifications.
Third Party Inspection can be performed on request at buyer’s care and expense.

ORDERING INSTRUCTIONS:

When ordering or requesting quotations on drill collars, please specify:

1. Drill collar OD
2. Drill collar ID
3. Overall length
4. Connections required (size and type)
5. Indicate preference for pressed or cast steel thread protectors
6. Special features desired, for example:

Slick or Spiral
Stress Relief Features
Slip and/or Elevator Recess
Hardbanding