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US 4,531,592 AGranted
Jet nozzle
OwnerAsadollah Hayatdavoudiinventor
Life of this patent
Estimating the term…
Abstract
Methods and apparatus are provided for extending the effective length of a jet of fluid exiting a nozzle. An elongated jet extension member extends substantially axially outward from a nozzle outlet, and the jet of fluid flowing along and around the extension member tends to cling to the extension member thus decreasing the angle of divergence of the fluid jet.
Claims20
An earth drill bit apparatus comprising:
- a drill bit body;
- a cutting means extending downward from said drill bit body;
- a nozzle passage means, disposed in said drill bit body and having a downwardly open nozzle outlet located above a lowermost portion of said cutting means, for directing a jet of drilling fluid downward toward a bottom of a hole being drilled by said cutting means;
- and
- an elongated jet extension member extending substantially axially downward from said nozzle outlet, said jet extension member having a peripherally encompassing external surface extending generally parallel to a longitudinal axis of said jet extension member, said extension member being so arranged and constructed that said jet of drilling fluid flows downward about and completely surrounds said peripherally encompassing external surface of said extension member.
2 more elements
A nozzle assembly comprising:
- a nozzle body having a nozzle passage disposed therethrough, said nozzle passage extending from a nozzle inlet to a nozzle outlet;
- and
- an elongated jet extension means, extending substantially axially outward from said nozzle outlet a distance greater than a diameter of said nozzle outlet, for extending a length of a jet of fluid exiting said nozzle outlet by causing said jet to follow a peripherally encompassing external surface of said extension means and diverge less than said jet would diverge in the absence of said extension means.
A method of extending a length of a jet of fluid exiting a nozzle outlet, comprising:
- (a) providing an elongated jet extension member extending outward from said nozzle outlet a distance greater than a diameter of said nozzle outlet;
- (b) flowing said jet of fluid about a peripherally encompassing external surface of said extension member along a length of said extension member and thereby causing said jet to follow said extension member;
- (c) thereby decreasing a lateral divergence of said jet of fluid as compared to the divergence which would occur in the absence of said extension member;
- and
- (d) thereby extending said length of said jet of fluid
2 more elements
An earth drill bit apparatus comprising:
- a drill bit body;
- a cutting means extending downward from said drill bit body;
- a nozzle passage means, disposed in said drill bit body and having a downwardly open nozzle outlet located above a lowermost portion of said cutting means, for directing a jet of drilling fluid downward toward a bottom of a hole being drilled by said cutting means;
- an elongated jet extension member extending substantially axially downward from said nozzle outlet;
- and
- extension adjustment means, operably associated with said elongated jet extension member, for varying a distance which said extension member extends downward from said nozzle outlet in response to an upward force exerted upon a lower end of said extension member.
3 more elements
An earth drill bit apparatus comprising:
- a drill bit body;
- a cutting means extending downward from said drill bit body;
- a nozzle passage means, disposed in said drill bit body and having a downwardly open nozzle outlet located above a lowermost portion of said cutting means, for directing a jet of drilling fluid downward toward a bottom of a hole being drilled by said cutting means;
- an elongated jet extension member extending substantially axially downward from said nozzle outlet;
- and
- wherein said elongated jet extension member is circular in cross section along a majority of its length, and has a flat lower end portion having a thickness less than a diameter of said circular cross section.
3 more elements
An earth drill bit apparatus comprising:
- a drill bit body;
- a cutting means extending downward from said drill bit body;
- a nozzle passage means, disposed in said drill bit body and having a downwardly open nozzle outlet located above a lowermost most portion of said cutting means, for directing a jet of drilling fluid downward toward a bottom of a hole being drilled by said cutting means;
- an elongated jet extension member extending substantially axially downward from said nozzle outlet;
- wherein said nozzle passage means is disposed through a nozzle insert, said nozzle insert being received in and detachably connected to said drill bit body;
- and
- wherein said extension merber has a plurality of laterally extending arms at its upper end, said arms engaging said nozzle insert to hold said extension member in said nozzle insert.
4 more elements
A method of extending a length of a jet of fluid exiting a nozzle outlet, comprising:
- (a) providing an elongated jet extension member extending along a central axis of said nozzle outlet outward from said nozzle outlet a distance greater than a diameter of said nozzle outlet;
- (b) flowing said jet of fluid substantially concentrically about said extension member along a length of said extension member and thereby causing said jet to follow said jet extension member;
- (c) thereby decreasing a lateral divergence of said jet of fluid as compared to the divergence which would occur in the absence of said extension member;
- and
- (d) thereby extending said length of said jet of fluid.
2 more elements
Dependencies are inferred from the claim text.