Abstract: A method is disclosed for insuring oil well treatment as with a corrosion inhibitor, for example, with a precise slug of a chemical on a regular basis comprising, briefly, repeatedly and precisely ejecting precisely spaced apart consecutive predetermined slugs of a chemical to the oil well by operating a first valve responsive to a first timer, and repeatedly and precisely ejecting a predetermined precise slug of a flush liquid behind each chemical slug by operating a second valve responsive to a second timer for insuring oil well chemical treatment on a regular basis as scheduled and for eliminating personnel time required for manually flushing each chemical slug throughout the oil well for an extended period of time.

Abstract: Disclosed is a system for locating well equipment at preselected locations within a well's tubing string. Positioned within the tubing string are a plurality of series of locating nipples. A locating tool runs through the tubing string. The locating tool may pass through at least one entire series of locating nipples without engaging any one nipple and subsequently engage a selected locating nipple in another series of locating nipples. This abstract is neither intended to define the scope of the invention, which, of course, is measured by the claims, nor is it intended to be limiting in any way.

Abstract: A method for heating a well or for initiating an in situ combustion operation to recover petroleum from a well in a subterranean reservoir, a method for assembling an ignition system for the in situ combustion, and an ignition system comprises an elongated combustion chamber suspended from a hollow electrical cable which supplies both electrical means and fuel gas to the chamber. Air inlet ducts in the walls of the combustion chamber receive air from the annular space between the hollow cable and the wellbore tubing. An electrical ignitor is temporarily energized to ignite the fuel-air mixture in the air inlet cylinder. An adjacent thermocouple is responsive to a flameout for re-energizing an ignitor manually such that burner operation is interrupted only momentarily .

Abstract: Flow channels behind the casing in a well are plugged by detecting a circumferential temperature anomaly on the casing, perforating in the direction of such anomaly, and introducing cement into the perforations. The apparatus for locating and perforating into a flow channel includes a sensitive temperature sensing assembly capable of detecting temperature differences as low as 0.01.degree. F, and an attached perforating gun having a fixed orientation in relation to the temperature sensing assembly.

Abstract: A tubing string device for giving an indication of the location of casing collars in a cased wellbore utilizes a tubular body having a resilient sleeve mounted thereon, and axial spring means abutting the resilient sleeve.

Abstract: A self-operating chemical feeder for an oil well is disclosed comprising a new combination of valves, Timers, a pump, an injection line, a flush line, and a tank of chemical wherein a first valve is responsive to a first timer for repeatedly ejecting spaced apart consecutive precise slugs of a chemical to the injection line for delivery to the oil well and for spacing each of the slugs from the next consecutive slug by a predetermined precise period of time. A second valve is responsive to a second timer for ejecting spaced apart slugs of flush liquid to the injection line, one flush liquid slug for each chemical slug, and for spacing each of the flush liquid slugs by a predetermined precise period of time for insuring oil well treatment on a regular basis as scheduled and for eliminating personnel time required for manually flushing each precise slug of said chemical throughout the well for an extended period of time.

Abstract: A process and system for insitu hydrogenation employing a gas generator in a borehole for burning a hydrogen-rich mixture of hydrogen and oxygen. The gas generator comprises a housing forming a chamber with a combustion zone at one end and a restricted outlet at the other end. Hydrogen and oxygen are supplied downhole to the generator to form a hydrogen-rich combustible mixture in the combustion zone which is burned whereby hydrogen and steam are injected from the restricted outlet. The flow of hydrogen and oxygen to the generator is controlled to maintain the temperature of the exhaust gases at a level sufficient to crack the hydrocarbons in the formation into lighter segments for reaction with the excess hot hydrogen to form lighter and less viscous end products which are recovered from a production well.

Abstract: A collar locating apparatus is disclosed. It is a wire line tool adapted to be run in a tubing string to count the number of collars and thereby determine depth. It incorporates an elongate body. It has a pair of caliper arms which are spring loaded to flare outwardly. The device is run to the bottom of the tubing string and is jar operated to sever a shear pin whereupon the caliper arms are released to deflect outwardly. The extent of deflection of the arms is determined by an adjustable nut below the arms which slides downwardly on the body and releases the arms for controlled outward deflection. The arms are pivoted and clamped at a common collar above the arms to enable them to pivot.

Abstract: Well bore completion method and apparatus which includes a perforating gun suspended from the end of a tubing string. A releasable coulping device is interposed between a stop means and the gun. When the releasable coupling is actuated, the gun, along with the lower marginal portion of the tubing string, is dropped to the bottom of the borehole.A special tool is run downhole and touches bottom, then raised to contact the stop means, to thereby enable a determination to be made regarding the feasibility of firing the gun. The tool is employed to fire the gun as well as to release the releasable coupling member. Provision is made by which the above sequence of operational steps may be interrupted at any time and the tool removed from the borehole.

Abstract: A new and improved wire line operated well tool apparatus and method utilizing a downhole transformer for sensing and testing conditions in a well, such as temperature, incline, and the like.

Abstract: The specification discloses a recovery process and system wherein hydrogen and oxygen are introduced into a vented pressure vessel, known as a gas generator, located at the bottom of a borehole, and ignited and burned to produce steam. The hydrogen and oxygen may be introduced either as a stoichiometric mixture or the combustible mixture may be hydrogen-rich. The gas generator comprises a cooling annulus surrounding a combustion and mixing zone for cooling the gas generator and the combustion products. Hydrogen or water may be supplied to the cooling annulus for cooling purposes. Remotely controlled valves are located downhole near the gas generator for positive control to the gas generator of the hydrogen and oxygen and of the water, if it is employed for cooling purposes. The well casing is sealed just above the gas generator by an inflatable packer.

Abstract: A process and system for insitu hydrogenation employing a gas generator in a borehole for burning a hydrogen-rich mixture of hydrogen and oxygen. The gas generator comprises a housing forming a chamber with a combustion zone at one end and a restricted outlet at the other end. A cooling annulus surrounds the chamber with passages leading from the annulus to the chamber. Hydrogen and oxygen are supplied downhole to the generator to form a hydrogen-rich combustible mixture in the combustion zone which is burned whereby hydrogen and steam are injected from the restricted outlet. Hydrogen also is supplied to the cooling annulus. The flow of hydrogen and oxygen to the generator is controlled to maintain the temperature of the exhaust gases at a level sufficient to crack the hydrocarbons in the formations into lighter segments for reaction with the excess hot hydrogen to form lighter and less viscous end products which are recovered from a production well.

Abstract: Pump-off control apparatus for preventing cavitation of a sub-surface pump which provides artificial lift for fluid produced from a fluid bearing strata located downhole in a borehole. A sound wave is focused downhole and travels down the casing annulus where it strikes the liquid surface and rebounds to a receiver located near the well head. The time lapse of the traveling wave is used to measure the relative location of the liquid surface relative to the pump inlet, thereby enabling the control apparatus to shut-in a well before it can encounter a pump-off condition which can cause fluid pounding.

Abstract: A self-contained wire line inflatable packer useful to carry an impression sleeve into a well for making impressions of the well surface, the inflatable sleeve of the wire line packer being automatically sequentially inflated and deflated by a valve controlled by a sequencing timer actuating means utilizing the flow of a noncompressible liquid through an orifice to provide time-sequenced operation.

Abstract: A self-contained wire line inflatable packer useful to carry an impression sleeve into a well for making impressions of the well surface, the inflatable sleeve of the wire line packer being automatically sequentially inflated and deflated by a valve controlled by a sequencing timer actuating means driven by an operating gas.

Abstract: A self-contained wire line inflatable packer useful to carry an impression sleeve into a well for making impressions of the well surface, the inflatable sleeve of the wire line packer being automatically sequentially inflated and deflated by a valve controlled by a sequencing timer actuating means.

Abstract: A self-contained wire line inflatable packer useful to carry an impression sleeve into a well for making impressions of the well surface, the inflatable sleeve of the wire line packer being automatically sequentially inflated and deflated by a valve controlled by a sequencing timer actuating means utilizing the flow of a noncompressible liquid through an orifice to provide time-sequenced operation.

Abstract: This is a subsurface safety valve for insertion in a tubing string centered in a well drilled in the earth normally for the production of oil or gas. Under normal flow conditions, a spring holds a flapper valve in an open position out of the flow path of the fluid. An increase in the temperature of the fluids flowing through the valve supplies the force to push the flapper into the flow stream where the fluid flow will cause it to close. A heat-sensitive fluid is contained in an annular reservoir surrounding the flow path of the fluid through the valve and an annular piston is in one end of the cylinder. Expansion of the fluid causes movement of the piston which has a rod which forces the flapper valve into the main fluid flow stream.