
Expandable reamers
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Underreamers RR
Underreamers RR are designed for enlarging any interval of wellbore (for liners, tail pipes, and profile packer, repair and remedial cementing intervals) in soft and medium hard formations.
Technical characteristics

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Size |
Body OD, mm |
Stabilizer, diameter, mm | Diameter over expanded blades, mm | Length, mm | Tool joint | |
GOST 28487-90 | API | |||||
RR-78-120-1 | 82 | 82 | 120 | 1022 | Z-66 | 2 3/8 Reg |
RR-92-156-1 | 92 | 94 | 156 | 1076 | Z-73 | NC-26 |
RR-94-142-1 | 94 | 94 | 142 | 1216 | Z-73 | NC-26 |
RR-105-132-1C | 105 | 114 | 132 | 1007 | Z-86 | NC-31 |
RR-105-215-1 | 105 | 107 | 215 | 1200 | Z-86 | NC-31 |
RR-118-127-1 | 118 | 118 | 127 | 1480 | Z-86 | NC-31 |
RR-118-130-1 | 118 | 118 | 130 | 1480 | Z-86 | NC-31 |
RR-118-132-1C | 118 | 118 | 132 | 1425 | Z-86 | NC-31 |
RR-118-137-1 | 118 | 118 | 137 | 1480 | Z-86 | NC-31 |
RR-118-146-1C | 118 | 118 | 146 | 1425 | Z-86 | NC-31 |
RR-118-149-1 | 118 | 118 | 149 | 1480 | Z-86 | NC-31 |
RR-118-152-1 | 118 | 118 | 152 | 1480 | Z-86 | NC-31 |
RR-118-156-1 | 118 | 118 | 156 | 1480 | Z-86 | NC-31 |
RR-115-226-1 | 115 | 116 | 226 | 1295 | Z-86 | NC-31 |
RR-115-226-1.118 | 115 | 118 | 226 | 1295 | Z-86 | NC-31 |
RR-120-192-1 | 120 | 122 | 192 | 1295 | Z-86 | NC-31 |
RR-120-226-1 | 120 | 122 | 226 | 1295 | Z-86 | NC-31 |
RR-120-226-1.136 | 120 | 136 | 226 | 1295 | Z-86 | NC-31 |
RR-122-156-1 | 122 | 138 | 156 | 1503 | Z-86 | NC-31 |
RR-132-168-1 | 132 | 142 | 168 | 1685 | Z-102 | NC-38 |
RR-132-168.138 | 132 | 138 | 168 | 1685 | Z-102 | NC-38 |
RR-132-226-1 | 132 | 136 | 226 | 1420 | Z-102 | NC-38 |
RR-138-175-1 | 138 | 148 | 175 | 1747 | Z-102 | NC-38 |
RR-138-190,5-1 | 138 | 160 | 190,5 | 1368 | Z-102 | NC-38 |
RR-138-190,5-1.139 | 138 | 139 | 190,5 | 1368 | Z-102 | NC-38 |
RR-138-215,9-1 | 138 | 139 | 215,9 | 1368 | Z-102 | NC-38 |
RR-138-226-1 | 138 | 142 | 226 | 1366 | Z-102 | NC-38 |
RR-138-240-1 | 138 | 142 | 240 | 1366 | Z-102 | NC-38 |
RR-138-280-1 | 138 | 142 | 280 | 1366 | Z-102 | NC-38 |
RR-142-400-1 | 142 | 142 | 400 | 1426 | Z-102 | NC-38 |
RR-142-500-1 | 142 | 142 | 500 | 1426 | Z-102 | NC-38 |
RR-158-194-1C | 158 | 161 | 194 | 1400 | Z-133 | NC-50 |
RR-185-240-1 | 185 | 212 | 240 | 1694 | Z-147 | 5 ½ FH |
RR-185-310-1 | 185 | 212 | 310 | 1694 | Z-147 | 5 ½ FH |
RR-185-380-1 | 185 | 212 | 380 | 1694 | Z-147 | 5 ½ FH |
RR-208-220,7-1 | 208 | 212 | 220,7 | 1825 | Z-147 | 5 ½ FH |
RR-206-240-1 | 206 | 212 | 240 | 1825 | Z-147 | 5 ½ FH |
RR-208-240-1 | 208 | 212 | 240 | 1825 | Z-147 | 5 ½ FH |
RR-208-400-1 | 208 | 212 | 400 | 1705 | Z-147 | 5 ½ FH |
RR-260-310-1 | 260 | 290 | 310 | 1950 | Z-171 | 6 5 ½ FH |
RR-260-330-1 | 260 | 290 | 330 | 1950 | Z-171 | 6 5 ½ FH |

Underreamers RR H
RR H underreamers are designed for reaming any intervals of wellbore as a part of BHA with pilot bit or for reaming previously drilled section.
Technical characteristics
Size |
Body OD, mm |
Stabilizer, diameter, mm | Diameter over expanded blades, mm | Length, mm | Tool joint | |
GOST 28487-90 | API | |||||
RR-118-132Н | 118 | 118 | 132 | 1194 | Z-86 | NC-31 |
PP-118-137H | 118 | 118 | 137 | 1194 | Z-86 | NC-31 |
RR-118-146Н | 118 | 118 | 146 | 1194 | Z-86 | NC-31 |
RR-118-156Н | 118 | 118 | 156 | 1194 | Z-86 | NC-31 |
RR-138-175Н | 138 | 148 | 175 | 1230 | Z-102 | NC-38 |
RR-158-194Н | 158 | 161 | 194 | 1250 | Z-133 | NC-50 |
RR-208-226Н | 208 | 212 | 226 | 1475 | Z-147 | 5 ½ FH |
RR-208-240Н | 208 | 212 | 240 | 1475 | Z-147 | 5 ½ FH |

Underreamers RR Sp
RR Sp type underreamers are designed for carrying out special operations in open hole implying drilling a rat hole for subsequent sidetracking from main directional well.
Technical characteristics
Size |
Body OD, mm |
Stabilizer, diameter, mm | Diameter over expanded blades, mm | Length, mm | Tool joint | |
GOST 28487-90 | API | |||||
RR-78-120 Sp-1 | 82 | 82 | 120 | 1022 | Z-66 | 2 ⅜ Reg |
RR-94-142 Sp-1 | 94 | 94 | 137 | 1216 | Z-73 | NC-26 |
RR-118-156 Sp-1 | 118 | 118 | 156 | 1480 | Z-86 | NC-31 |
RR-138-200 Sp-1 | 138 | 141 | 200 | 1747 | Z-86 | NC-31 |
All types of reamers are supplied with check valve to prevent clogging of the tool with cuttings during tripping operations, and replaceable blades that can be easily replaced in drilling conditions, which significantly reduces the operating costs for repair and maintenance of the tool.
Characteristics
Tool series |
Body / centralizer diameter, mm |
Opening diameter, mm |
Overall length, mm |
Connection thread |
|
GOST |
API |
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RR |
|||||
|
88 / 94 |
142 |
1,216 |
Z-66 |
|
|
105 / 114 |
132 |
1,337 |
Z-86 |
|
|
115 / 116 |
226 |
1,295 |
Z-86 |
|
|
114 / 118 |
127 |
1,480 |
Z-86 |
|
|
114 / 118 |
130 |
1,480 |
Z-86 |
|
|
114 / 118 |
137 |
1,480 |
Z-86 |
|
|
114 / 118 |
146 |
1,480 |
Z-86 |
|
|
114 / 118 |
152 |
1,480 |
Z-86 |
|
|
114 / 118 |
156 |
1,480 |
Z-86 |
|
|
114 / 118 |
192 |
1,294 |
Z-86 |
|
|
114 / 118 |
226 |
1,294 |
Z-86 |
|
|
122 / 142 |
156 |
1,503 |
Z-86 |
|
|
132 / 142 |
168 |
1,685 |
Z-102 |
|
|
121 / 136 |
226 |
1,420 |
Z-102 |
|
|
138 / 148 |
175 |
1,747 |
Z-102 |
|
|
138 / 160 |
190.5 |
1,386 |
Z-102 |
|
|
130 / 139 |
215.9 |
1,368 |
Z-102 |
|
|
138 / 142 |
226 |
1,366 |
Z-102 |
|
|
138 / 142 |
240 |
1,366 |
Z-102 |
|
|
138 / 142 |
280 |
1,366 |
Z-102 |
|
|
185 / 212 |
240 |
1,694 |
Z-147 |
|
|
185 / 212 |
310 |
1,694 |
Z-147 |
|
|
185 / 212 |
380 |
1,694 |
Z-147 |
|
RR H |
|||||
|
118 / 118 |
132 |
1,194 |
Z-86 |
|
|
118 / 118 |
146 |
1,194 |
Z-86 |
|
|
118 / 118 |
156 |
1,194 |
Z-86 |
|
|
138 / 148 |
175 |
1,230 |
Z-102 |
|
|
158 / 161 |
194 |
1,250 |
Z-133 |
|
|
208 / 212 |
226 |
1,475 |
Z-147 |
|
|
208 / 212 |
240 |
1,475 |
Z-147 |
|
RR Sp |
|||||
|
78 / 82 |
120 |
1,022 |
Z-66 |
|
|
114 / 118 |
156 |
1,480 |
Z-86 |
|
|
138 / 141 |
200 |
1,747 |
Z-86 |
|
Documentation
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Milling tools catalogue
Reviews
Publications
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Analysis of the Causes of self-unscrewing of the Elements of Expandable Milling and reaming tools
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Remedial cementing technology - cutting off fluid migration along the wellbore
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Gubkinsky branch of RN-Burenie LLC engaged the engineering and technical service of “BURINTEKH”, Ltd with RR-118/146 and RR 105/132 reamers. The wellbore was reamed to the nominal diameter, and the work was done to a high standard.
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“BURINTEKH”, Ltd PDC reamers solve the problem of cuttings transport
Patents
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Expandable hole reamer
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Expandable hole reamer
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Expandable reamer
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