DOG Drilling on Gauge Sub
17/10/2016

drilling on gauge sub has been specifically designed to deliver at-the-bit reaming. Its short body design and durable cutting structure enables placement between the bit and motor for directional applications. This results in a smoother build section and reduction in hole drag allowing for better weight transfer to the drill bit. The cutting structure is comprised of synthetic diamond-enhanced inserts, which gives the DOG sub its continuous reaming capability. Each insert is brazed into the body, eliminating moving parts found in conventional reamers.

Hole size, in	Connection dize	Bore diameter,	Shoulder to	Rib length,	Weight,
	and type	in	shoulder length, in	in	lbm
4¾	27⁄8 Reg	1¼	6½	57⁄8	39
57⁄8	3½ Reg	1¼	73⁄8	6 ⁄16	51
6	3½ Reg	1¼	73⁄8	63⁄8	54
61⁄8	3½ Reg	1¼	7½	67⁄16	57
6¼	3½ Reg	1¼	7½	67⁄16	61
6½	3½ Reg	1¼	77⁄8	65⁄8	66
6¾	3½ Reg	1¼	81⁄8	65⁄8	71
73⁄8	4½ Reg	2¼	8¼	65⁄8	64
7½	4½ Reg	2¼	73⁄8	63⁄8	79
77⁄8	4½ Reg	2¼	8	65⁄8	88
8¼	4½ Reg	2¼	83⁄8	67⁄8	95
83⁄8	4½ Reg	2¼	83⁄8	71⁄8	102
87⁄16	4½ Reg	2¼	83⁄8	7	107
8½	4½ Reg	2¼	83⁄8	7	111
8¾	4½ Reg	2¼	89⁄13	7¼	115
9	4½ Reg	2¼	9½	67⁄8	110
9½	65⁄8 Reg	3	85⁄8	77⁄8	112
97⁄8	65⁄8 Reg	3	91⁄8	7¾	159
105⁄8	65⁄8 Reg	3	97⁄8	81⁄8	181
11	65⁄8 Reg	3	103⁄8	83⁄8	187
115⁄8	65⁄8 Reg	3	10½	87⁄8	174
121⁄8	65⁄8 Reg	3	11½	7	214
12¼	65⁄8 Reg	3	113⁄8	9	206
14¾	75⁄8 Reg	33⁄8	217⁄8	9¾	563
15½	75⁄8 Reg	33⁄8	22¼	7¼	523
16	75⁄8 Reg	33⁄8	225⁄8	101⁄8	578
17½	75⁄8 Reg	3	241⁄8	105⁄8	706
20	75⁄8 Reg	3	26¾	83⁄5	980
22	75⁄8 Reg	3	287⁄8	9	1122