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STOP COLLARS
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Features:
1、The stop collars are available in three types: Knock-On Type, Spiral Nail Type and Set Screw Type.
2、The stop collars can be installed on any position on casing to limit the axial movement of centralizers and cement baskets.
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TECHNICAL PARAMETERS：
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Specifications
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13 3/8"
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10 3/4"
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9 5/8"
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8 1/8"
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7 5/8"
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7"
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5 1/2"
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5"
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4 1/2"
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I.D.,mm
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338
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272
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245
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206
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193
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177
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139
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126
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114
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O.D.,mm
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350
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284
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257
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218
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285
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189
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151
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138
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126
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Holding Force ,KN
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40
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40
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40
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30
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30
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30
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30
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24
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24
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SCRATCHER
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SCRATCHER
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Features:
The scratcher can be used to wipe the mud cake inside the upper casing and open hole and improve cementing.
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TECHNICAL PARAMETERS：
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Casing Size
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7"
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5 1/2"
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Open hole Size ,mm
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215.9-222.2
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184-215.9
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Max O.D. ,mm
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279
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254
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