Overshot is an effective tool used for catch the fish with smooth external surface. It can produce
the high-pressure slurry circulate after catching the fish. A drill mill attached in bottom is
used to cut the upturned edge on the fish top. Some accessories like extension sub, wall hook
and enlarged guide etc. can be used to catch the fishes learn on the well wall. Once the fish
caught gets stuck, overshot is easy to release the fish and withdraw the overshot in the downhole.
Applicable documents: SY/T5068-2000
the type and main parameter of overshot
|
type |
O.D. mm（in |
connection |
Catch size mm(in) |
normal load KN |
|
LT-T76 |
76 ( 3) |
Nc26 |
32～50 |
270 |
|
LT-T89 |
89 ( 3 1/2) |
NC26 |
32～60 |
320 |
|
LT-T95 |
95(3 3/4) |
Nc26 |
48～73 |
400 |
|
LT-T102 |
102（4） |
Nc26 |
48～73 |
500 |
|
LT-T105 |
105 (4 1/8) |
NC31 |
48～79 |
450 |
|
LT-T108 |
108(4 1/4) |
Nc31 |
48～79 |
550 |
|
LT-T114 |
114(4 1/2) |
NC31 |
60～89 |
500 |
|
LT-T127 |
127 (5) |
NC31 |
60～95 |
700 |
|
LT-T134 |
134 (5 1/4) |
NC31 |
60～105 |
700 |
|
LT-T143 |
143 (5 5/8) |
NC31 |
65～115 |
670 |
|
LT-T152 |
152 (6) |
NC31 |
65～121 |
850 |
|
LT-T162 |
162 (6 3/8) |
NC46 |
89～127 |
1000 |
|
LT-T168 |
168 (6 5/8) |
NC50 |
89～127 |
1200 |
|
LT-T178 |
178 (7) |
NC50 |
89～127 |
1500 |
|
LT-T187 |
187 (7 3/8) |
NC50 |
111～159 |
1000 |
|
LT-T194 |
194 (7 5/8) |
NC50 |
111～159 |
1200 |
|
LT-T200 |
200 (7 7/8) |
NC50 |
111～159 |
1450 |
|
LT-T206 |
206(8 1/8) |
NC50 |
111～168 |
1400 |
|
LT-T213 |
213(8 3/8) |
NC50 |
124～178 |
1400 |
|
LT-T219 |
219(8 5/8) |
NC50 |
124～178 |
1650 |
|
LT-T225 |
225(8 7/8) |
NC50 |
124～178 |
1900 |
|
LT-T232 |
232(9 1/8) |
NC50 |
124～178 |
2200 |
|
LT-T238 |
238(9 3/8) |
NC50 |
124～178 |
2500 |
|
LT-T241 |
241(9 1/2) |
NC50 |
124～178 |
2650 |
|
LT-T245 |
245(9 3/4) |
6 5/8REG |
127～203 |
1900 |
|
LT-T254 |
254(10) |
6 5/8REG |
127～203 |
2350 |
|
LT-T260 |
260(10 1/4) |
6 5/8REG |
127～219 |
1950 |
|
LT-T270 |
270(10 5/8) |
6 5/8REG |
127～229 |
2050 |
|
LT-T273 |
273(10 3/4) |
6 5/8REG |
127～229 |
2200 |
|
LT-T286 |
286(11 1/4) |
6 5/8REG |
127～245 |
2150 |
|
LT-T295 |
295(11 1/2) |
6 5/8REG |
127～245 |
2700 |
|
LT-T298 |
298(11 3/4) |
6 5/8REG |
127～245 |
2850 |
|
LT-T302 |
302(11 7/8) |
6 5/8REG |
127～245 |
3100 |
|
LT-T340 |
340(13 3/8) |
6 5/8REG |
229～280 |
3500 |
