|
The ornamental design for a drill bit, as shown and described. |
FIG. 1 is a perspective view of a drill bit showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a side elevational view taken from the left of FIG. 1;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a side elevational view taken from the right of FIG. 1;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof.
Patent | Priority | Assignee | Title |
5180022, | May 23 1991 | DOVER BMCS ACQUISITION CORP | Rotary mining tools |
5303787, | May 23 1991 | DOVER BMCS ACQUISITION CORP | Rotary mining tools |
5547033, | Dec 07 1994 | Halliburton Energy Services, Inc | Rotary cone drill bit and method for enhanced lifting of fluids and cuttings |
5595255, | Aug 08 1994 | Halliburton Energy Services, Inc | Rotary cone drill bit with improved support arms |
5606895, | Aug 08 1994 | Halliburton Energy Services, Inc | Method for manufacture and rebuild a rotary drill bit |
5624002, | Aug 08 1994 | Halliburton Energy Services, Inc | Rotary drill bit |
5755297, | Dec 07 1994 | Halliburton Energy Services, Inc | Rotary cone drill bit with integral stabilizers |
D273680, | Nov 18 1980 | Fagersta AB | Roller bit |
D340248, | May 23 1991 | DOVER BMCS ACQUISITION CORP | Roof drill bit for mining |
D372253, | Jan 17 1995 | Halliburton Energy Services, Inc | Support arm and rotary cone for modular drill bit |
D384084, | Jan 17 1995 | Halliburton Energy Services, Inc | Rotary cone drill bit |
D708238, | Jun 12 2013 | Drill bit | |
D775676, | Jul 13 2015 | Button drill bit | |
D892868, | Aug 17 2017 | Downhole Products Limited | Tubing shoe |
D941373, | Sep 16 2019 | KYOCERA SGS PRECISION TOOLS EUROPE LTD | Rougher tool |
D941374, | Mar 16 2020 | KYOCERA SGS PRECISION TOOLS EUROPE LTD | Finisher tool |
Patent | Priority | Assignee | Title |
1663332, | |||
1860587, | |||
2147926, | |||
2901224, | |||
178899, |
Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Date | Maintenance Fee Events |
Date | Maintenance Schedule |