Asadollah Hayatdavoudi
Engineering in Lafayette, LA

4670161, Jun 2, 1987

Aug 19, 1985

6/766704

Asadollah Hayatdavoudi - Lafayette LA

Premiere Casing Services, Inc. - Lafayette LA

B04C 508

210739

In one embodiment, the cyclone separator includes an adjustable sidearm conduit which selectively receives different strata of particles passing through the radially outer sectors of the cylindrical region defined within the cyclone body. The cyclone separator may further include a traveling cone valve to restrict the size of the lower outlet. The vortex finder of the cyclone may include a vortex side port to extract the heavier particles entrained in the forced vortex received by the intake of the vortex finder. An inner vortex finder tube is further disposed in the passage through the vortex finder. In another embodiment, the traveling cone is replaced by a lower outlet head spaced from the lower outlet and the lower portion of the housing defining the apex of the frustoconical region. A control system may be combined with the cyclone separator to analyze the particles extracted from the various outlets from the cyclone and effect a change of the controllable features of the cyclone such as the position of the sidearm conduit and affecting the size of the lower outlet. A method for separating particles includes establishing a free vortex and a forced vortex within the cyclone and selectively extracting strata of particles traveling in the radially outer sectors in the cylindrical region of the cyclone body.

4587024, May 6, 1986

Aug 21, 1984

6/642803

Asadollah Hayatdavoudi - Lafayette LA

Premiere Casing Services, Inc. - Lafayette LA

B04C 508

210739

In one embodiment, the cyclone separator includes an adjustable sidearm conduit which selectively receives different strata of particles passing through the radially outer sectors of the cylindrical region defined within the cyclone body. The cyclone separator may further include a traveling cone valve to restrict the size of the lower outlet. The vortex finder of the cyclone may include a vortex side port to extract the heavier particles entrained in the forced vortex received by the intake of the vortex finder. A control system may be combined with the cyclone separator to analyze the particles extracted from the various outlets from the cyclone and effect a change of the controllable features of the cyclone such as the position of the sidearm conduit and affecting the size of the lower outlet. A method for separating particles includes establishing a free vortex and a forced vortex within the cyclone and selectively extracting strata of particles traveling in the radially outer sectors in the cylindrical region of the cyclone body.

4488607, Dec 18, 1984

Sep 27, 1982

6/423515

Asadollah Hayatdavoudi - Lafayette LA
Ladd M. Adams - Norman OK

Petroleum Instrumentation & Technological Services - Lafayette LA

E21C 708

175 65

Apparatus and methods are disclosed for drilling a well. A separator sub includes a cyclone separator which separates a stream of drilling mud into a less dense first portion and more dense second portion. The stream of drilling mud flows downward in an annular stream around the cyclone separator and then flows into a lower end of the cyclone separator. The less dense first portion of the stream of drilling mud is directed from the cyclone separator downward to a drill bit so that the drilling mud adjacent the drill bit has a density less than an initial density of the stream of drilling mud. The more dense second portion of the stream of drilling mud is directed upward from the cyclone separator and is ejected into a well annulus with an upward component of velocity and thereby reduces a hydrostatic drilling mud pressure adjacent the drill bit.

4586825, May 6, 1986

Jun 22, 1982

6/390821

Asadollah Hayatdavoudi - Lafayette LA

B01F 1502

366137

A fluid agitating apparatus includes a housing having an inlet at an open lower end thereof, and an outlet at an open upper end thereof, with a flow passage disposed through the housing communicating the inlet and the outlet. The flow passage is preferably circular in cross-section and has a minimum diameter at a throat thereof. The diameter of the flow passage increases continuously from the throat toward both the inlet and the outlet. A vertically upward directed nozzle is located in the flow passage below the throat for inducing flow of fluid from a body of fluid in which the housing is submerged into the inlet and upward through the flow passage. A tangentially directed nozzle is disposed in the flow passage above the throat for inducing a swirling flow in the fluid flowing upward through the flow passage. This creates a swirling vortex type flow exiting the outlet of the housing which provides agitation of the fluid in which the apparatus is submerged.

4417899, Nov 29, 1983

Dec 17, 1981

6/331803

John D. Morris - Norman OK
Asadollah Hayatdavoudi - Lafayette LA

The Board of Regents of The University of Oklahoma - Norman OK

C10L 514, C10L 532

44 6

A coal pellet which disintegrates in the presence of excess heat and comprises coal particles, water soluble binder and water. The binder is first dissolved in water and then coal particles are blended with the aqueous binder solution. The blend is agitated until pellets are formed and then the pellets are coated with a water resistant film. The coal pellets have water entrained therein which is converted to a gaseous form when the pellets are subjected to heat thereby facilitating the heat induced bursting of the pellets to free the coal particles for more efficient burning.

4491414, Jan 1, 1985

Jun 22, 1982

6/390954

Asadollah Hayatdavoudi - Lafayette LA
Ronald F. Marascalco - Lafayette LA

Petroleum Instrumentation & Technological Services - Lafayette LA

B01F 510

366 6

A fluid agitating apparatus is disposed in a vessel containing a body of fluid to be agitated. The fluid agitating apparatus includes a housing having an inlet at an open lower end thereof, and an outlet at an open upper end thereof, with a flow passage disposed through the housing communicating the inlet and the outlet. The flow passage is preferably circular in cross-section and has a minimum diameter at a throat thereof. The diameter of the flow passage increases continuously from the throat toward both the inlet and the outlet. A vertically upward directed nozzle is located in the flow passage below the throat for inducing flow of fluid from the body of fluid in which the housing is submerged into the inlet and upward through the flow passage. A tangentially directed nozzle is disposed in the flow passage above the throat for inducing a swirling flow in the fluid flowing upward through the flow passage. This creates a swirling vortex type flow exiting the outlet of the housing which provides agitation of the body of fluid in which the apparatus is submerged.

4475603, Oct 9, 1984

Sep 27, 1982

6/423527

Asadollah Hayatdavoudi - Lafayette LA

Petroleum Instrumentation & Technological Services - Lafayette LA

E21B 2100

175 65

Apparatus and methods are disclosed for drilling a well. A separator sub is used to separate a stream of drilling mud into a less dense first portion and more dense second portion. The less dense first portion of the stream of drilling mud is directed downward to a drill bit so that the drilling mud adjacent the drill bit has a density less than an initial density of the stream of drilling mud. The more dense second portion of the stream of drilling mud is ejected into a well annulus with an upward component of velocity and thereby reduces a hydrostatic drilling mud pressure adjacent the drill bit.

4715625, Dec 29, 1987

Oct 10, 1985

6/786950

Jess W. Shows - Maurice LA
Asadollah Hayatdavoudi - Lafayette LA

Premiere Casing Services, Inc. - Lafayette LA

B65H 5910

285145

An apparatus for supporting pipe includes a support member defining an inner bowl surface in which is received a plurality of layers of arcuate slip segments. Preferably, the slip segments of each layer are staggered relative to the slip segments of adjacent layers.

4531592, Jul 30, 1985

Feb 7, 1983

6/464672

Asadollah Hayatdavoudi - Lafayette LA

E21B 1060

75 67

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.