Downhole Motor
Rotary Reamer
Introduction:
Rotary Reamer is designed for various reams in drilling operation. Especially it can perform the double functions of centralization and reaming when drilling in very abrasive formations. This is a versatile tool which can be used for different hole sizes ranging from 4-5/8＂to 26＂by selecting proper rollers and simply adjust the blocks. In addition, its service life can be extended by replacing new rollers when the old rollers are worn and become smaller.
The body is made of modified alloy steel, fully heat treated to 285～341 Brinell hardness and 54J minimum impact strength. Connections are phosphated, coated with thread dope and equipped with thread protectors, and are accord with API standard.
Three different types (T, F and B) of rollers are offered:
Type T: For soft formations.
Type F: For medium hard formations.
Type B: For hard formations.
Specifications:
Item Hole size Rotary Reamers
Connection Overall length
(mm) Neck OD
(mm) Roller Dia.
(mm) Roller length
(mm)
1 26〞 7-5/8H90 3000 254 178 400
2 17-1/2〞 7-5/8REG 2200 228 140 304
3 12-1/4〞 7-5/8REG 2000 228 100 300
4 8-1/2〞 4IF 1730 165 71 200
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