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Due to different sizes, some dth hammers cannot be directly connected with the drill pipe, so a reducer joints (adapters)s required.
|
Connection |
Box up |
API 2 3"/8REG |
API 2 3"/8REG |
API 2 3"/8REG |
API 3 1"/2REG |
API 3 1"/2REG |
API 2 7"/8REG |
API |
API |
|
|
Box down |
API2 3"/8REG |
API2 7"/8REG |
API3 1"/2REG |
API3 1"/2REG |
API4 1"/2REG |
API2 3"/8REG |
API3 1"/2REG |
API4 1"/2REG |
||
|
C |
Length(mm) |
140.0 |
134.9 |
146.0 |
101.6 |
134.9 |
134.9 |
134.9 |
174.6 |
|
|
J |
Length Shoulder (mm) |
50.8 |
69.85 |
39.7 |
39.7 |
39.7 |
39.7 |
39.7 |
100.0 |
|
|
E |
Width Apanner Flats (mm) |
65.0 |
50.8 |
50.8 |
50.8 |
50.8 |
50.8 |
50.8 |
50.8 |
|
|
d |
Std bore (mm) |
24.0 |
31.75 |
25.4 |
44.45 |
52.4 |
31.75 |
44.45 |
44.45 |
|
|
Outside diameter |
D1 |
Top (mm) |
88.9 |
88.9 |
114.3 |
127.0 |
114.3 |
88.9 |
114.3 |
114.3 |
|
D2 |
Bottom (mm) |
88.9 |
88.9 |
88.9 |
127.0 |
146.0 |
88.9 |
114.3 |
146.0 |
|
|
F |
Across Flat (mm) |
69.85 |
69.85 |
98.4 |
98.4 |
98.4 |
69.85 |
98.4 |
98.4 |
|
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