FKR design ensures cutting-off casing section all round in any interval
Blades expand to operating position under drop of pressure in body

Preview

ФКР-верт.jpg

Expandable string mills FKR

Expandable mill FKR is designed for continuous casing section milling throughout the diameter in any interval of wellbore. Expansion of blades, reinforced with high quality composite material, into operating position is provided by the effect of differential pressure in mill body. FKR scope of delivery includes back valve, which prevents tool from sludging during round-trip operations.

Features:

  • Wear pads preventing loss of diameter;
  • Hydraulic activation;
  • Changeable blades;
  • Capability of using both for cutting-off and for full milling of casing;
  • Changeable sleeves for different flow rates;
  • Stabilizers provide additional protection from loss of diameter as well as stabilizing FKR relative casing;
  • Bottom stabilizer is equipped with no turn system.

Characteristics

Size

Cutoff casing diameter, mm

Body OD / Stabilizer diameter, mm

Extended blades OD, mm

Tool joint

ГОСТ

28487–90

API

FKR-102-1

102

80 / 82

127

З-66

2 ⅜ Reg

FKR-114-1

114

88 / 94

142

З-73

NC-26

FKR-127-1

127

107 / 107

156

З-86

NC-31

FKR-140-1

140

108 / 116

164

З-86

NC-31

FKR-146-1

146

114 / 124

170

З-86

NC-31

FKR-168-1

168

138 / 141

212

З-102

NC-38

FKR-178-1

178

148 / 150

223

З-102

NC-38

FKR-194-1

194

154 / 164

223

З-102

NC-38

FKR-219-1

219

185 / 187

270

З-147

5 ½ FH

FKR-245-1

245

185 / 212

290

З-147

5 ½ FH

Documentation

Publications

  • Analysis of vibration impact on self-unscrewing of the elements of Expandable Milling and reaming tools

  • Analysis of the Causes of self-unscrewing of the Elements of Expandable Milling and reaming tools

Patents

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