|
RU2720433C1
|
|
Emulsion drilling mud "oilkarb bio"
|
|
RU2711171C1
|
|
Drillable shoe with power drive for casing string bottom equipment
|
|
RU2701668C1
|
|
Method for isolation of fluid inflows into well
|
|
RU2711222C1
|
|
Heat-resistant biopolymer drilling mud
|
|
RU2711220C1
|
|
System for lubrication and compensation of drilling cone bit pressure
|
|
RU2704049C1
|
|
Bit steel
|
|
RU2696741C1
|
|
Blade bit with wear-resistant cutting structure (embodiments)
|
|
RU2698759C1
|
|
Drilling string arrangement for construction of horizontal sections of large length
|
|
RU2687815C1
|
|
Gel-drill drilling fluid
|
|
RU2646179C1
|
|
Method for processing drill bit foot
|
|
RU2652727C1
|
|
Blade chisel with cylindrical cutting structure
|
|
RU2652726C1
|
|
Blade chisel with wear-resistant cylindrical cutting structure
|
