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Class Information
Number: 175/393
Name: Boring or penetrating the earth > Bit or bit element > With fluid conduit lining or element (e.g., slush tube)
Description: Apparatus in which the bit is provided with means to conduct fluid comprising (1) a coated or treated passage or (2) a distinct element which is limited in use to fluid conducting, directing or blocking a fluid passage.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4437708 |
Cutting devices for mining and tunnelling machines |
Mar. 20, 1984 |
| 4429755 |
Drill with polycrystalline diamond drill blanks for soft, medium-hard and hard formations |
Feb. 7, 1984 |
| 4398611 |
Mining drill |
Aug. 16, 1983 |
| 4397362 |
Drilling head |
Aug. 9, 1983 |
| 4396077 |
Drill bit with carbide coated cutting face |
Aug. 2, 1983 |
| 4392534 |
Composite nozzle for earth boring and bore enlarging bits |
Jul. 12, 1983 |
| 4391467 |
System for producing a uniform rubble bed for in situ processes |
Jul. 5, 1983 |
| 4391339 |
Cavitating liquid jet assisted drill bit and method for deep-hole drilling |
Jul. 5, 1983 |
| 4381825 |
Drill bit nozzle |
May. 3, 1983 |
| 4373594 |
Rotary drill bit |
Feb. 15, 1983 |
| 4369850 |
High pressure fluid jet cutting and drilling apparatus |
Jan. 25, 1983 |
| 4360069 |
Diamond drill bits |
Nov. 23, 1982 |
| 4359115 |
Novel rotary drill bits and drilling process |
Nov. 16, 1982 |
| 4352399 |
Bit breaker and handle |
Oct. 5, 1982 |
| 4341273 |
Rotary bit with jet nozzles |
Jul. 27, 1982 |
| 4336850 |
Internal fluid screen to prevent nozzle and port plugging |
Jun. 29, 1982 |
| 4334585 |
Insert retention and cooling apparatus for drag bits |
Jun. 15, 1982 |
| 4323130 |
Drill bit |
Apr. 6, 1982 |
| 4303136 |
Fluid passage formed by diamond insert studs for drag bits |
Dec. 1, 1981 |
| 4299298 |
Down-the-hole drilling |
Nov. 10, 1981 |
| 4290498 |
Ablatible drill |
Sep. 22, 1981 |
| 4280572 |
Chisel for a percussive tool |
Jul. 28, 1981 |
| 4262757 |
Cavitating liquid jet assisted drill bit and method for deep-hole drilling |
Apr. 21, 1981 |
| 4246977 |
Diamond studded insert drag bit with strategically located hydraulic passages for mud motors |
Jan. 27, 1981 |
| 4200160 |
Sweep pickup for a big hole bit |
Apr. 29, 1980 |
| 4195700 |
Large diameter bit with sweep pickup |
Apr. 1, 1980 |
| 4174759 |
Rotary drill bit and method of forming bore hole |
Nov. 20, 1979 |
| 4126194 |
Rock bit with extended pickup tube |
Nov. 21, 1978 |
| 4124162 |
Shroud for a submerged jet cutting nozzle |
Nov. 7, 1978 |
| 4106577 |
Hydromechanical drilling device |
Aug. 15, 1978 |
| 4086972 |
Method and apparatus for roof drilling |
May. 2, 1978 |
| 4083417 |
Jetting apparatus |
Apr. 11, 1978 |
| 4022287 |
Percussion drill bit |
May. 10, 1977 |
| 4022286 |
Auger |
May. 10, 1977 |
| 4009760 |
Apparatus for roof drilling |
Mar. 1, 1977 |
| 3951220 |
Archimedes spiral drill bit |
Apr. 20, 1976 |
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