? Product Description ?Product Name:Roller Centralizer ? Rigid centralizer consisits of a rigid body,on which machined five spiral blades and streamlined diversion trenches between blades. On every spiral blades, there are three or four rollers made from modified alloy steel fully heat treated. The assembly is shown as following fig. Because of the rigid body and rolling friction betwwen the rollers and inside wall of well or casing, the capacity of the Rigid centralizer is better than others of all. Recommend to use the tool in cementation of deviated holes and horizontal holes. ? Technical Data: ?

Type	Casing Size	Minimum Hole	I.D.	O.D.	OAL
	(mm/inch)	(mm/inch)	(mm/inch)	(mm/inch)	(mm/inch)
5"	139.7(5-1/2)	215.9(8-1/2)	143(5-5/8)	211(8-5/16)	260(10-1/4)
7"	177.8(7)	215.9(8-1/2)	181(7-1/8)	213.4(8-13/32)	260(10-1/4)
9-5/8"	244. (9-5/8)5	311.15(12-1/4)	247.5(9-11/16)	305.4(12-1/64)	260(10-1/4)
13-3/8"	339.7(13-3/8)	406.4(16)	344(13-35/64)	402(15-53/64)	260(10-1/4)

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