Asymmetric diamond impregnated drill bit
Abstract
A drill bit including a bit body and a plurality of blades formed in the bit body. The blades are formed, at least in part, from a base matrix material that on one embodiment is impregnated with abrasive particles. One side of the bit is formed, with respect to its axis of rotation, to a smaller radius than the opposite side of the bit. The asymmetry of the bit enables the bit to drill a larger diameter hole than a pass through diameter of the bit. The opposite side defines a contact angle between the bit and a formation. In one embodiment, the contact angle is at least 140 degrees.. In one embodiment, a plurality of inserts may be located on the blades to provide gage protection. In another embodiment, the bit may also include a gage sleeve that helps keep the bit stabilized in the wellbore.

Term
Term ended
Projected expiry passed 18 July 2021, 5.2 years ago.
- Priority
- Filed
- Published
- Projected expiry
- Today
1 sheet
Sheet 1
Every citation, both ways
| Document | Relation | Office | Category | Cited during | Relevant claims |
|---|---|---|---|---|---|
| EP0822318A1 | Cites | European Patent Office (EPO) | Y | Search report | 1,2,4,10,11,25 |
| US3367430A | Cites | United States of America | Y | Search report | 1,2,4,10,11,25 |
6 members in 3 offices
Priority claims5
| Document | Office | Kind | Date |
|---|---|---|---|
| 619742 | United States of America | – | |
| 61974200 | United States of America | A | |
| 61974200 | United States of America | A | |
| 619742 | – | – | – |
| US20000619742 | – | – | – |
Members6
| Document | Office | Kind | |
|---|---|---|---|
| EP1174584A2 | European Patent Office (EPO) | A2 | |
| US6474425B1 | United States of America | B1 | |
| EP1174584A3This record | European Patent Office (EPO) | A3 | |
| EP1174584B1 | European Patent Office (EPO) | B1 | |
| DE60117435D1 | Germany | D1 | |
| DE60117435T2 | Germany | T2 |
32 legal events, as 4 offices reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | Office | |
|---|---|---|---|
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal feeWithdrawnR119 | R119 | DE | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Notification of lapseLapsedST | ST | FR | |
| Gb: european patent ceased through non-payment of renewal feeCeasedGBPC | GBPC | EP | |
| Be: lapsedLapsedBERE | BERE | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| No opposition filedOpposition26N | 26N | EP | |
| No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE | PLBE | EP | |
| Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA | STAA | EP | |
| Fr: translation filedET | ET | EP | |
| Corresponds to:REF | REF | EP | |
| Designated contracting statesAK | AK | EP | |
| European patent grantedGrantedFG4D | FG4D | GB | |
| (expected) grantORIGINAL CODE: 0009210GRAA | GRAA | EP | |
| Grant fee paidORIGINAL CODE: EPIDOSNIGR3GRAS | GRAS | EP | |
| Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOSNIGR1GRAP | GRAP | EP | |
| First examination report despatched17Q | 17Q | EP | |
| Designation fees paidAKX | AKX | EP | |
| Request for examination filed17P | 17P | EP | |
| Designated contracting statesAK | AK | EP | |
| Request for extension of the european patentAL;LT;LV;MK;RO;SIAX | AX | EP | |
| Search report despatchedORIGINAL CODE: 0009013PUAL | PUAL | EP | |
| Information provided on ipc code assigned before grant7E 21B 10/46 A, 7E 21B 10/56 BRIC1 | RIC1 | EP | |
| Designated contracting statesAK | AK | EP | |
| Request for extension of the european patentAL;LT;LV;MK;RO;SIAX | AX | EP | |
| Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI | PUAI | EP |
Numbers
- Publication
- 1174584
- Publication, DOCDB
- 1174584
- Publication, EPODOC
- EP1174584
- Application
- 1117366
- Application, DOCDB
- 01117366
- Application, EPODOC
- EP20010117366
Titles3
- German
- Asymmetrischer diamantimprägnierter Bohrmeissel
- English
- Asymmetric diamond impregnated drill bit
- French
- Trépan de forage asymétrique en diamants imprégnés
Classification
- CPC, 3
- E21B17/1092
- E21B10/46
- E21B10/265
- IPC, 3
- E21B10 26
- E21B10 46
- E21B17 10
Designated states2
- Contracting states, 1
- Türkiye
- Extension states, 1
- Slovenia