Spiral Drill Collar

Product Detail

Drill Collar

Technical features

l   A hardness range of 25 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;

l   Connections are completed (phosphate coated) to protect them from the elements after machining and help prevent galling upon initial make-up;

l   Thread root are cold rolled on API and H-90 connections;

l   Pressed steel thread protectors are supplied for all drill collar that are equipped with standard connections

When ordering please specify;

l   Drill collar OD and ID;

l   Overall length;

l   Connections required (size and type);

l   Special features desired, for example:

              Slick or spiral;

          Stress relief features;

          Slip and/or elevator recess;

      Hardbanding;

Technical parameters

Number and Connection Table	Product Code	Outside Diameter		Inside Diameter		Length mm	Bevel Diameter mm	Bending Strength Ratio
		mm	in	mm	in
NC23-31	Z01/Z02-01000	79.4	3 1/8	31.8	1 1/4	9150	76.2	2.57:1
NC35-47	Z01/Z02-06000	120.6	4 3/4	50.8	2	9150	114.7	2.58:1
NC46-65(4IF)	Z01/Z02-09100	165.1	6 1/2	71.4	2 13/16	9150 or 9450	154.8	3.05:1
6 5/8 REG	Z01/Z02-15000	209.6	8 1/4	71.4	2 13/16	9150 or 9450	195.7	2.93:1
NC70-97	Z01/Z02-25000	247.6	9 3/4	76.2	3	9150 or 9450	232.6	2.57:1
8 5/8 REG	Z01/Z02-19000	279.4	11	76.2	3	9150 or 9450	266.7	2.84:1