Roy D Bobo

US Patent:

47113065, Dec 8, 1987

Filed:

Sep 16, 1986

Appl. No.:

6/908106

Inventors:

Roy A. Bobo - Houston TX

International Classification:

E21B 4300

US Classification:

166372

Abstract:

The method of the present invention relates to a gas lift operation wherein pressurized injection gas is mixed with pressurized injection liquid prior to introducing the pressurized mixture into a borehole. The pressurized injection gas and liquid mixture is introduced into one portion of the well bore to a point below an initial column of well fluid present in another portion of the well bore conduit. As the mixture of injection gas and liquid travels towards the bottom of the well bore the gas is compressed more and more by the height of the column of liquid thereabove and is subsequently passed to said another portion of the well bore where the gas rises and expands to lift the oil or other well fluid to the surface. As a result of the expanding rising gas in the production conduit and the lifting of the initial charge of well fluid in the production conduit, the pressure at the lower end of the production conduit adjacent the producing formation drops, thereby inducing additional well fluid to enter said another portion of the well bore from the formation. Further injection of pressurized injection gas and liquid lifts any additional oil or other well fluid emerging from the formation to the surface. '.

US Patent:

41782348, Dec 11, 1979

Filed:

Jul 20, 1978

Appl. No.:

5/926441

Inventors:

Roy A. Bobo - Houston TX

International Classification:

B04C 5107
B04C 513

US Classification:

209211

Abstract:

A new and improved rotating cyclone centrifuge apparatus having an accelerator (A) which receives a liquid feed having solid particles to be separated therefrom in an axial direction and discharges it radially outwardly in a helical flow through diametrically opposite chokes (40b) into a separation chamber (10c) whose diameter substantially coincides with the outer extremities of the chokes, whereby the fluid flow is first brought up to the velocity of the rotating apparatus and is further accelerated in excess of the velocity of the rotating apparatus as the fluid enters the separation chamber without plugging of entranceways or of the chokes by the solids in the liquid feed. The liquid feed is precisely separated into a heavy phase which has the heavier particles and a light phase which has the bulk of the liquid and lighter particles, both of which are discharged from the same end of the separation chamber, and opposite from the feed inlet end. Means (42) is provided for stabilizing an air core for the light phase discharge, and also means (30, 33) is provided to readily adjust the split between the light and heavy phases discharged from the apparatus.