PEMSCO Ltd. Products - Safety Clamps

4. Heavy Weight Drill Pipe

General
Heavy weight drill pipe is an intermediate-weight drill string element. It can effectively reduce the stress between drill pipe and drill collar and provide part of drill pressure.
The integral heavy weight drill pipe is made from AISI 4145H alloy steel and is fully heat treated. The tool joints of welded heavy weight drill pipe are made from AISI 4145H alloy steel too. All physical properties conform to API Spec 7. Every drill pipe is fully inspected by an ultrasonic unit (at full length and over full section). The standard hardbanding is on the pipe connections and center upset. On the pipe ends, it is 4-inch wide hard metal, while on the center upset, it is 3-inch wide hard metal. The hardbanding is completely flush on either side of the connection. The thickness of the hardbanding is not more than 3.2 mm (l/8 in) compared to that of the adjacent pipe surface. The thickness may be specified by customers.
Product type
• Standard integral heavy weight drill pipe
• Standard welded heavy weight drill pipe
• Spiraled integral heavy weight drill pipe

Main Technical Parameters of Standard Integral/Welded HW Drill Pipe

Nomina lsize	Total length	Pipe body						Toot joint				Weight
mmin	mft	ID mmin	WT mmin	Area cm² in²	Center upset OD mmin	Center upset length mmin	Elevator upset mmin	Joint threadtype & size	ODmmin	IDmmin	Pin & boxlengthmmin	kg/mlb/ft
88.9	9.45	57	16	36.3	102	610	86	NC38	121	57	635/584	34.5
3-1/2	31	2-1/4	0.625	5.625	4	24	3-5/8	NC38	4-3/4	2-1/4	25/23	23.2
101.6	9.45	57	16	42.8	114	610	105	NC40	133	57	635/584	40.5
4	31	2-1/4	0.625	6.627	4-1/2	24	4-1/8	NC40	5-1/4	2-1/4	25/23	27.2
114.3	9.45	57	22	64.3	127	610	117	NC46	159	57	635/584	61.0
4-1/2	31	2-1/4	0.875	9.965	5	24	4-5/8	NC46	6-1/4	2-1/4	25/23	41.0
127.0	9.45	76	25.4	81	140	610	130	NC50	171	76	635/584	70.0
5	31	3	1.000	12.586	5-1/2	24	5-1/8	NC50	6-3/4	3	25/23	49.7
139.7	9.45	89	27	95.6	152	610	144	5-1/2 FH	178	89	635/584	84.9
5-1/2	31	3-1/2	1.063	14.812	6	24	5-11/16	5-1/2 FH	7	3-1/2	25/23	57.0
168.3	9.45	114	27	120	181	610	171	6-5/8 FH	203	114	635/584	105.0
6-5/8	31	4-1/2	1.063	18.567	7-1/8	24	6-3/4	6-5/8 FH	8	4-1/2	25/23	70.8

Notes: ¹ Any kind of combination of standard integral/welded HW drill pipe and tool joint of other models and sizes is available;
²We can supply the HW drill pipe with other outside and inside diameters according to the customers' requirements.
Main Technical Parameters of Spiraled Integral HW Drill Pipe

Nomi- nal size mmin	Length mft	Pipe body						Toot joint				Weight
Nomi- nal size mmin	Length mft	ID mmin	WT mmin	Area cm²in²	Center upset OD mmin	Center upset length mmin	Elevator upset mmin	Joint threadtype & size	ODmmin	IDmmin	Pin & boxlengthmmin	kg/mlb/ft
88.9	9.45	57	16	36.3	102	470	86	NC38	121	57	635/584	39.8
3-1-2	31	2-1-4	0.625	5.625	4	18.5	3-5-8	NC38	4-3-4	2-1-4	25/23	26.7
101.6	9.45	57	16	42.8	114	470	105	NC40	133	57	635/584	46.2
4	31	2-1-4	0.625	6.627	4-1-2	18.5	4-1-8	NC40	5-1-4	2-1-4	25/23	31
114.3	9.45	57	22	64.3	127	470	117	NC46	159	57	635/584	67
4-1-2	31	2-1-4	0.875	9.965	5	18.5	4-5-8	NC46	6-1-4	2-1-4	25/23	45
127	9.45	76	25.4	81	140	470	130	NC50	171	76	635/584	80.4
5	31	3	1	12.566	5-1-2	18.5	5-1-8	NC50	6-3-4	3	25/23	54
139.7	9.45	89	27	95.6	152	470	144	5-1/2 FH	178	89	635/584	93.4
5-1-2	31	3-1-2	1.063	14.812	6	18.5	5-11-16	5-1/2 FH	7	3-1-2	25/23	62.7
165.1	9.45	114	27	120	181	470	156	6-1/2 FH	203	114	635/584	114
6-1-2	31	4-1-2	1.063	18.567	7-1-8	18.5	6-1-8	6-1/2 FH	8	4-1-2	25/34	76.3

Notes: ¹ Any kind of combination of standard integral/welded HW drill pipe and tool joint of other models and sizes is available;
² We can supply the HW drill pipe with other outside and inside diameters according to customers' equirements.

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