Spears grip the fish bore; overshots catch the OD when the bore is blocked or inaccessible.
Controlled release and re-engagement turns a one-shot gamble into a repeatable operation.
Precise catch-size ↔ part-number mapping keeps POs unambiguous and field engagement predictable.
Catch sizes dimensionally verified per part before shipment, with EN 10204 3.1 certificates.
| Parameter | Specification |
|---|---|
| Applicable Casing Sizes | 4-1/2" to 13-5/8" (full matching tables on request) |
| Engagement | Internal (spear) / external (overshot), with releasing mechanism |
| Body Material | AISI 4140 / 4145H alloy steel, quenched & tempered |
| Connections | Per API Spec 7-2 / ISO 10424-2; custom on request |
| Catch Size Verification | Dimensional inspection per part by calibrated CMM |
| Surface Treatment | Phosphating or blackening (standard) |
| Documentation | EN 10204 3.1 certificate, hardness report, lot traceability, batch sample test report |
| Third-Party Inspection | SGS / BV or nominated inspection available on request |
| Casing Weight (lb/ft) | OD (in) | ID (in) | Catch Size Range (in) |
|---|---|---|---|
| 7" 22# | 7.000 | 6.398 | 6.350 – 6.398 |
| 7" 26# | 7.000 | 6.276 | 6.220 – 6.276 |
| 7" 29# | 7.000 | 6.184 | 6.130 – 6.184 |
| 7" 32# | 7.000 | 6.094 | 6.050 – 6.094 |
| 7" 38# | 7.000 | 5.920 | 5.870 – 5.920 |
Full matching tables for 4-1/2" to 13-5/8" casing available on request.
Releasing spears and overshots for internal and external fish engagement — with grapples precision-matched to your casing program and released on command.
Use case: recovery of pipe, drill collars, and tubing where every extra trip is measured in rig days. A 0.1–0.2″ ID difference between adjacent casing weights means a wrong grapple either slips or refuses to engage — which is why every Heverda grapple is matched to the exact casing weight and verified by CMM before it ships. Tell us the fish type, casing program, and objective; we confirm the tool and catch size before you order.
