FIELD: soil or rocks drilling.
SUBSTANCE: group of inventions relates to a shank adaptor having a reinforced region of the flush hole. Rock drilling device comprises a shank adaptor. Shank adaptor comprises an elongated body having a first end to be positioned towards a piston and a second end to be positioned towards a drill string. Body has an axially extending internal bore to allow passage of a flushing fluid to the drill string via the second end. Adaptor comprises one flush hole or two diametrically arranged flush holes extending radially through the body to the internal bore. Cross sectional area of the body at an axially reinforced region of the flush hole is equal to or greater than a cross sectional area of the body at an axial position of the internal bore axially beyond the reinforced region.
EFFECT: reduction of localised stress concentrations in the wall of the adaptor.
15 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| SHANK ADAPTER WITH REINFORCED FLUSHING HOLE | 2016 |
|
RU2706042C2 |
| SHANK ADAPTOR WITH FRACTURE RESISTANT FLUSHING HOLE | 2014 |
|
RU2656272C2 |
| DRILLING ROD OR ADAPTER WITH REINFORCED CONNECTING ELEMENT IN FORM OF BUSHING | 2016 |
|
RU2713548C2 |
| PERCUSSIVE ROCK DRILL BIT WITH FLUSHING GROOVES | 2014 |
|
RU2674487C2 |
| DRILL BIT WITH GROOVES IN CRUSHING SURFACE | 2015 |
|
RU2681762C2 |
| DRILL STRING WITH BEND RESISTANT COUPLING | 2014 |
|
RU2666801C2 |
| ARRANGING DRILL BIT ASSEMBLY WITH SUBMERSIBLE STRIKER | 2017 |
|
RU2718705C2 |
| ENERGY TRANSMISSION EFFICIENT DRILL STRING COUPLING | 2014 |
|
RU2667552C2 |
| QUICK RELEASE DOWN-THE-HOLE HAMMER DRILL BIT ASSEMBLY | 2014 |
|
RU2671366C2 |
| THREADED CONNECTING END FOR COMPONENT OF DRILL STRING | 2016 |
|
RU2714405C2 |
