WO2010141671A3
Device for the dynamic under balance and dynamic over balance perforating in a borehole
Abstract
According to a preferred embodiment, a dynamic underbalance device has a longitudinally extending tool string including an underbalance part. A first overbalance part is above the underbalance part and a second overbalance part below the underbalance part. Upon application of underbalance from the underbalance part and overbalance from the overbalance part, the overbalance and underbalance interact to isolate the underbalance.
Term
No projected expiry on record.
- Priority
- Filed
- Published
- Today
Every citation, both ways
| Document | Relation | Office | Cited during |
|---|---|---|---|
| WO2009042479A1 | Cites | World Intellectual Property Organization (WIPO) | International search |
| US6598682B2 | Cites | United States of America | International search |
3 priority claims, no other members on record
Priority claims3
| Document | Office | Kind | Date |
|---|---|---|---|
| 18380509 | United States of America | P | |
| 61183805 | – | – | – |
| US20090183805P | – | – | – |
3 legal events, as the office reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | |
|---|---|---|
| Ep: pct application non-entry in european phase122 | 122 | |
| Non-entry into the national phaseNENP | NENP | |
| Ep: the epo has been informed by wipo that ep was designated in this application121 | 121 |
Numbers
- Publication
- 2010/141671
- Publication, DOCDB
- 2010141671
- Publication, EPODOC
- WO2010141671
- Application
- 37188
- Application, DOCDB
- 2010037188
- Application, EPODOC
- WO2010US37188
Titles2
- English
- DEVICE FOR THE DYNAMIC UNDER BALANCE AND DYNAMIC OVER BALANCE PERFORATING IN A BOREHOLE
- French
- DISPOSITIF PERMETTANT LA PERFORATION EN SOUS-PRESSION DYNAMIQUE ET LA PERFORATION EN SURPRESSION DYNAMIQUE DANS UN TROU DE FORAGE
Classification
- CPC, 2
- E21B43/114
- E21B43/117
- IPC, 1
- E21B29 00
Designated states145
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- Sierra Leone
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- Uganda
- Zambia
- Zimbabwe
- Eurasian Patent Organization (EAPO)
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- Azerbaijan
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- Kazakhstan
- Republic of Moldova
and 57 moreShow fewer
- Russian Federation
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