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Contact Person : Mr. Zhao Johnson
Company Name : Jiangsu Hexin Petroleum Machinery Co., Ltd.
Tel : 86-515-85322566
Fax : 86-515-85322385
Address : Jiangsu,Yancheng,No. 9, Weiwu Road, Dongtai Economic Development Area
Country/Region : China
Zip : 225400

spiral drill collars 279.4mm*76.2mm

Product Detailed

Related Categories:Steel Pipes

1.standard: API7-1 2.OD:79.4mm-279.4mm 3. factory directly delivery

Spiral drill collar is the main products in Jiangsu HEXIN, such drill collar can provent drilling process in the differential pressure block, the spiral groove will allow the mud around the drill collar of freedom flow to differentialpressure sticking. With the drilling shaft to reduce the contact area. Which can effectively reduce the block have the possibility of differential pressure.

Spiral drill collar had been widely used because of the characteristics of its own decesion,this special spiral drill collar to reduce the tube wall and the contact area. The drill sting so as to avoid “sticking”phenomenon.

Type	OD(mm)	ID(mm)	L(m) ±152.4mm d	DF(mm) ±0.4
NC23-31	79.4	31.8	9.14	76.2
NC26-35	88.9	38.1	9.14	82.9
NC31-41	104.8	50.8	9.14or9.45	100.4
NC35-47	120.6	50.8	9.14or9.45	114.7
NC38-50	127	57.2	9.14or9.45	121
NC44-60	152.4	57.2	9.14or9.45	144.5
NC44-60	152.4	71.4	9.14or9.45	144.5
NC46-62	158.8	57.2	9.14or9.45	149.2
NC46-62	158.8	71.4	9.14or9.45	150
NC46-65	165.1	57.2	9.14or9.45	154.8
NC46-65	165.1	71.4	9.14or9.45	154.8
NC46-67	171.4	57.2	9.14or9.45	159.5
NC50-70	177.8	57.2	9.14or9.45	164.7
NC50-70	177.8	71.4	9.14or9.45	164.7
NC50-72	184.2	71.4	9.14or9.45	169.5
NC56-77	196.8	71.4	9.14or9.45	185.3
NC56-80	203.2	71.4	9.14or9.45	190.1
6-5/8REG	209.6	71.4	9.14or9.45	195.6
NC61-90	228.6	71.4	9.14or9.45	212.7
7-5/8REG	241.3	76.2	9.14or9.45	223.8
NC70-97	247.6	76.2	9.14or9.45	232.6
NC70-100	254	76.2	9.14or9.45	237.3
8-5/8REG	279.4	76.2	9.14or9.45	266.7
NC50-67	171.5	71.4	9.14or9.45	159.5