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Junk Subs

Junk Subs

Junk Subs

During drilling process,drilling fishing cup is applied mainly for fishing of shivers and fallen objects such as carbide tooth, drill bit and bearing which can not be carried out of hole by conventional fluid circulation,etc It possesses important functions to keep hole toe cleaning,increase bit service life,reduce and prevent drill bit from unexpected damage.

Structure

Due to the fact that the O.D. of external bowl of fishing cup is bigger and a smaller circular space is available between extemal bowl of fishig cup and well hole;the mandrel diameter at cup mouth is larger so that it has a bigger annular space,therefore,the fluid at the cup mouth form a swirls and suddenly fall down so as to reduce the carrying capacity. By this way,some heavy objects will drop in cup and be fished out so that the purpose of cleaning ofhole toe is carried out.

Specifications – Junk Sub

Model

Hole Size (mm)

ThreadConn.

I.D. (mm)

O.D. (mm)

LB94

108~117.5

2 3/8 REG

19

94

LB102

117.5~124

2 7/8 REG

32

102

LB114

130~149

3 1/2 REG

38

114

LB127

152.4~162

3 1/2 REG

38

127

LB140

165~190.5

3 1/2 REG

38

140

LB168

190.5~216

4 1/2 REG

57

168

LB178

219~244.5

4 1/2 REG

57

178

LB190

229~273

4 1/2 REG

57

190

LB197

235~279.5

4 1/2 IF

70

197

LB219

244~295

6 5/8 REG

76

219

LB229

254~305

6 5/8 REG

76

229

LB245

292~330

6 5/8 REG

76

245

LB280

330~375

7 5/8 REG

76

280

LB311

327~375

7 5/8 REG

76

311

LB327

375~444.5

7 5/8 REG

76

327

LB340

386~456

7 5/8 REG

76

340

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