IMPRESSION BLOCK

TECHNICAL SUMMARY

Impression block is used for judging the depth of fish and shape of fish’s top. To make workers know the shape of fishing top and location and choose suitable fishing tools to fish successfully.

Impression block is made of joint steel body and Pub rooted in bottom of joint steel body, there is a circle hole in center of impression block to circle drill fluid. there is ring groove on the casting part of joint so that fixing impression block, joint connects with pipe string with its upper connection thread.

IMPRESSION BLOCK

SPECIFICATION

Spec.

Thread Connection

I.D. of Lead Die

Length (mm)

OAL (mm)

O.D.

Thread Model (in)

270

203

6 ⅝ REG

40

150

450

225

165

4 ½ REG

40

130

400

195

159

4 IF

30

10

35

170

121

3 ½ IF

30

120

300

120

108

2 ⅞ IF

20

100

300

100

89

2 ½ ZG

0

100

250