REYNALDO CALDERON, M.D.
Medical Practice at Holcombe Blvd, Houston, TX

4293037, Oct 6, 1981

Feb 28, 1980

6/125418

Reynaldo Calderon - Houston TX

Texaco Inc. - White Plains NY

B01D 2534, E03B 320, E21B 3708, E21B 4308

166312

Method for assembling a self-cleaning helical spring sand screen for use at the petroliferous unconsolidated sand strata of an oil well are disclosed. The basic method comprises (1) attaching a helical spring sand screen to the lower end of a production tube for being lowered into a well to the liquid level for producing sand-free liquid from the production tube, (2) mounting a spring biased valve means on the production tube, (3) providing valve means for the production tube for controlling the outlet thereof, and (4) connecting a source of high pressure liquid to the spring biased valve means for storing energy in its spring, for expanding its helical spring sand screen, and for ejecting liquid into its helical spring sand screen for expansion and cleaning thereof. The resultant self-cleaning helical spring sand screen is so formed that upon ceasing of flow of high pressure liquid, the stored energy in another spring contracts the helical spring sand screen for restoring production of sand-free oil from the production tube. A second method which forms and assembles a second modification is disclosed.

4249292, Feb 10, 1981

Jun 4, 1979

6/044896

Reynaldo Calderon - Houston TX

Texaco Inc. - White Plains NY

B23P 1516

291635CW

Methods for cleaning sand from a helical spring sand filter, methods for assembling a self-cleaning helical spring sand filter, and a self-cleaning helical spring sand filter for use at the petroliferous unconsolidated sand strata of an oil well are disclosed. The filter comprises a helical spring connected in tension at each end to an elongated perforated sleeve for spacing apart all convolutions by a predetermined distance for forming the filter. One or more washer shaped cleaning rings with square holes therein are mounted between adjacent convolutions at one end of the spring for being rotated by a square ended rod supported by a sucker rod in a well between all of the convolutions to the spring other end for scraping off all foreign material from between the convolutions. The spring sand filter can be cleaned for as many times as there are cleaning rings instead of making trips to the surface for unclogging.

4237978, Dec 9, 1980

Jul 30, 1979

6/061972

Reynaldo Calderon - Houston TX
Billy H. Towell - Houston TX

Texaco Inc. - White Plains NY

E21B 3708

166311

A method for cleaning a helical spring screen that has become clogged up while filtering liquid deep in a well and while simultaneously producing filtered liquid from the well comprises (1) positioning a cleaning washer with a large opening therein between two coils at one end of the helical spring screen, and (2) rotating the cleaning washer with a rotatable rod of a smaller circumference between all of the coils to the other end of the spring screen for cleaning all foreign material from between the coils of the spring screen, and for simultaneously producing filtered liquid through the cleaning washer large opening while sliding over the rod from one end to the other. A method for forming or assembling a self-cleaning helical screen and two modifications of a new and improved self-cleaning helical spring screen are also disclosed herein. Likewise, a new torque drive mechanism is disclosed between a reversible rotatable square bar means for rotating a washer while providing free longitudinal movement of the square rod in the washer, and for providing free passage of liquid therebetween the bar and the washer.

4714460, Dec 22, 1987

Jun 6, 1986

6/871528

Reynaldo Calderon - Houston TX

A61B 106

604 28

Catheter feedback methods and systems are disclosed for optimizing the infusion of a drug, such as a chemotherapeutic agent via retrograde perfusion through the venous side of the vascular network to a selectively determined portion of a solid tumor. Monitoring and regulatory capability are provided for controlling the outflow of the drug and thereby for controlling the dose rate, the duration of exposure of the drug, the leakage factor, and the level of systemic toxicity, all critical factors in the successful treatment of solid tumors. A feedback loop for practicing the method comprises two concentric balloon catheters capable of extensive maneuvering and selective placement within the venous drainage of the vascular system, creating a third in-vivo space for repeated perfusion of the selected portion of a diseased organ as often as desired, providing maximum exposure of the chemotherapy to the tumor with minimum exposure to any other portions of the patient's body.

4867742, Sep 19, 1989

Aug 7, 1987

7/083673

Reynaldo Calderon - Houston TX

A61B 106

604 28

Tumors in the body of a patient are studied in situ by a monitor, such as computer assisted tomography, X-ray or the like, while optimal flow paths through the tumor area are established. A catheter with a suction lumen and an infusion lumen, with seals associated with each, is placed in the patient's vein near the tumor. Flow is then sealed in the vein with the infusion seal. A carrier medium dye is injected into the tumor at selected flow rates and differential pressures. Flow of the dye through the tumor is observed on the monitor to determine optimal retrograde perfusion paths through the tumor for the selected flow rates and differential pressures. Once the optimal perfusion paths are noted, microspheres with active ingredients, such as chemotherapy, can be selectively perfused through each of the paths in the tumor at desired flow rates, pressures and active ingredient dosages. Alternatively, microspheres with different active ingredients can be selectively introduced through the tumor in different paths at desired active ingredient dosages and established flow rates and pressures.

4227576, Oct 14, 1980

Feb 16, 1979

6/012934

Reynaldo Calderon - Houston TX

Texaco Inc. - White Plains NY

E21B 3708, E21B 4308

166312

Methods for cleaning sand from a helical spring sand screen for use at the petroliferous unconsolidated sand strata of an oil well are the basic steps: (1) ceasing flow from the production tube, (2) injecting high pressure liquid into a reciprocal valve means for expanding the helical spring sand screen, and (3) injecting more high pressure liquid into the helical spring sand screen for cleaning thereof. Then upon ceasing of flow of the high pressure liquid, the stored energy in another spring contracts the helical spring sand screen for restoring production of sand-free oil from the production tube. A second modification is disclosed.

7914514, Mar 29, 2011

Jun 16, 2005

11/154413

Reynaldo Calderon - Houston TX, US

A61M 31/00

604509

A computerized system collects, organizes and stores various sets of data during several phases of treatment relating to monitoring and location of a route in vivo and a visible image of that route for retrograde perfusion of a tumor with a therapeutic agent and for monitoring treatment procedures during such retrograde perfusion. The data obtained from present and past treatment procedures are stored for analysis and also made available real time to treating physicians during treatment procedures.

7947030, May 24, 2011

Dec 30, 2004

11/026103

Reynaldo Calderon - Houston TX, US

A61M 31/00

604509

A system and method permit monitoring and location of a route in vivo and a visible image of that route for retrograde perfusion of a tumor with a therapeutic agent. Once the route is located, the path for flow of therapeutic agent to the tumor is confirmed as being a closed loop. The therapeutic agent is then introduced into the closed loop through retrograde perfusion to treat the tumor. The number of types and amounts of treating agents may be adjusted and observed as the treatment is in progress.

4306428, Dec 22, 1981

Aug 3, 1979

6/063611

Reynaldo Calderon - Houston TX
Billy H. Towell - Houston TX

Texaco Inc. - White Plains NY

F16D 100, E21B 3702, E21B 4308, B01D 3516

64 1S

A new torque drive mechanism is disclosed between a reversible rotatable square bar means for rotating a washer while providing free longitudinal movement of the square rod in the washer, and for providing free passage of liquid therebetween the bar and the washer.