FIELD: technological processes.
SUBSTANCE: invention relates to drilling bits and may be used in drilling of wells. The cone bit support includes balls and non-separator rolls between ball and roll collars of a leg and a rolling cutter. Side contacts of rolls between each other and end contacts of rolls with roll collars are equipped with a scheme of additional coatings, providing in any point of contacts permanent friction pairs "steel - anti-friction coating", making it possible to increase wear resistance of rubbing surfaces compared to the friction pair of "steel on steel" due to the fact that one half of the number of rolls in a path has an anti-friction strengthening coating on the entire surface of the cylinder and ends, and the other half has such coating only at both ends, rolls of both groups are installed with each other in the steel rolling path by alternation method.
EFFECT: increased resistance of a bit support.
3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DISMOUNTABLE WHEEL-TYPE DRILLING BIT WITH SHORTENED SECTIONS OF ARMS | 2007 |
|
RU2369717C2 |
| ROLLER BIT BEARING | 1990 |
|
RU2019669C1 |
| DRILLING ROLLER-BIT BEARING ASSEMBLY | 0 |
|
SU1252473A1 |
| FLUID-TIGHT BEARING ASSEMBLY OF ROTARY DRILLING BIT | 0 |
|
SU927953A1 |
| SEALED-AWAY ROTARY BIT BEARING ASSEMBLY | 0 |
|
SU903558A1 |
| ROLLER-CUTTER DRILLING BIT | 0 |
|
SU1745919A1 |
| BIT GREBENNIKOV-MALINKIN-USHAKOVA'S CONE CUTTER | 2006 |
|
RU2334075C2 |
| ROLLING DRILLING BIT | 2009 |
|
RU2393321C1 |
| SUPPORT OF ROLLING CUTTER DRILLING BIT | 1990 |
|
RU2023857C1 |
| DRILLING BIT WITH SUPPORT SEALING | 2004 |
|
RU2269635C1 |
