API Drill Pipe Tool Joint

 

Drill pipe tool joint main technical advantage 

1. Raw material : choose  alloy steel forging material 

2. Heat treatment :advanced heat treatment temperature control technology 

3. Mechanical property : each tool joint would be tested with body sample 

4. Thread machining with CNC lathe ,ensure its thread accurancy .

 

The following is normal tool joint size 

 

Drill pipe tool joint size ,thread and weight
Double shouldered connection with high resistance torque
Model	Tool joint  OD	Tool joint  ID	Pin length	Pitch	Side step  torque	Main stel torque
NC26	3-3/8	1-3/4	3	2.668	2066	6875
NC31	4-1/8	2	3-1/2	3.813	5020	13389
NC31	4-3/8	1-5/8	3-1/2	3.183	7150	17170
NC38	5	2-9/16	4	3.808	6428	20326
NC38	5	2-7/16	4	3.808	7928	22213
NC38	5	3-1/8	4	3.808	11174	26515
NC40	5-3/8	2-7/16	4-1/2	4.072	11150	29930
NC40	5-1/4	2-9/16	4-1/2	4.072	9623	27760
NC40	5-1/2	2-1/4	4-1/2	4.072	13245	32493
NC40	6-1/2	2-7/16	4-1/2	4.072	11150	30114
NC46	6	3-1/4	4-1/2	4.626	10451	33625
NC46	6	3	4-1/2	4.626	14898	39229
NC46	6-1/4	3	4-1/2	4.626	14898	39659
NC46	6-1/4	2-3/4	4-1/2	4.626	18860	44871
NC46	6-1/4	2-1/2	4-1/2	4.626	22352	49630
NC46	6-1/4	2-1/4	4-1/2	4.626	25389	53936
NC50	6-5/8	3-3/4	4-1/2	5.042	10956	37676
NC50	6-5/8	3-1/2	4-1/2	5.042	16678	44673
NC50	6-5/8	3-1/4	4-1/2	5.042	21859	51447
NC50	6-5/8	3	4-1/2	5.042	26513	57800
NC50	6-5/8	2-3/4	4-1/2	5.042	30656	63406
5-1/2FH	7	3-3/4	5	5.591	25185	60338
5-1/2FH	7	3-1/2	5	5.591	31214	60338
5-1/2FH	7-1/4	3-1/2	5	5.591	29000	72480
5-1/2FH	7-1/4	3-1/4	5	5.591	36672	76156
5-1/2FH	7-1/2	3	5	5.591	41571	87341
Main step torque value is referred to API standard torque