Overshot
- There are two types of Overshots: Short Catch Overshot, Releasing and Circulating Overshot.
- Connection made by API 5DP, API 5B and GOST.
- Short Catch Overshot is used for catching short length fish which the stuck point is closed or above the coupling, such as tubing, drill pipe, sucker rod and subs.
- Releasing and Circulating Overshot can fish the pipes externally. It can catch drill collar, drill pipe, tubing, subs and other pipes.
- Technical Specification
- Description
- Drawing
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Specification of the Short Catch Overshot
| Type | Outside diameter
O.D. mm（in） |
Salvage range
mm |
Connection | Hole diameter
mm |
Tension |
| DYLT95 | 95（3-3/4） | 47～49 | NC26 | 114.3-120.8 | 450 |
| DYLT105 | 104.8（4-1/8） | 59.7～61.3 | NC31 | 127-139.7 | 500 |
| DYLT114 | 114（4-1/2） | 72～74.5 | NC31 | 139.7-146 | 500 |
| DYLT135 | 135（5-5/16） | 87.9～90.6 | NC31 | 159.6-168 | 600 |
| DYLT146 | 146（5-3/4） | 100.4～103.2 | NC38 | 168-178 | 630 |
| DYLT206 | 206（8-1/8） | 165～170 | NC50 | 224～228 | 1018 |
Specification of Releasing and Circulating Overshot
|
Type |
O.D. of overshot mm（inch）
|
MAX. fish dimension
mm（inch） |
Connection |
|
| Spire slip mm（inch） | Basket slip
mm（inch） |
|||
| T-T324 | 324（12-3/4） | 282.6(11-1/8） | 266.7（10-1/2） | 6-5/8REG |
| LT-T298 | 298（11-3/4） | 257.2（10-1/8） | 228.6（9） | 6-5/8REG |
| LT-T270 | 270（10-5/8） | 228.6（9） | 203.2（8） | 6-5/8REG |
| LT-T206 | 206（8-1/8） | 177.8（7） | 159（6-1/4） | NC50 |
| LT-T200 | 200（7-7/8） | 171.5（6-3/4） | 155.6（6-1/8） | NC50 |
| LT-T146 | 146（5-3/4） | 117.5（4-5/8） | 108（4-1/4） | NC38 |
| LT-T143 | 146（5-5/8） | 120.7（4-3/4） | 108（4-1/4） | NC38 |
| LT-T102 | 102（4） | 77.8（3-1/16） | 65（2-9/16） | NC26 |
Overshot is a downhole tool used in fishing operations to engage on the outside surface of a tube or tool. A grapple, or similar slip mechanism, on the overshot grips the fish, allowing the application of tensile force and jarring action. If the fish cannot be removed, a release system within the Overshot allows the overshot to be disengaged and retrieved.
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Lake Petro is located in Dongying City, which is famous for Shengli Oilfield and the largest manufacturing hub of petroleum equipment in China. Following the principle of “quality first, science and technology innovated, people oriented”, every Lake Petro person is sparing no effort to provide the customers with best products and services. Our products are based on advanced production line and testing equipment, our products are designed and manufactured according to certification of API, ISO, GOST, etc.