Abstract: In order to install a ground loop for a geothermal heating and/or cooling system in ground material, a drilling machine having a drill bit connected to an end of first tubing may be used to create an borehole in the ground material. After the borehole is created, grout may be pumped into the borehole through the first tubing as the first tubing is removed from the borehole. This allows the borehole to be grouted from the bottom towards the top. Thereafter, second tubing may be inserted into the grout in order to create the ground loop. This eliminates the need for a “tremie” pipe to insert the ground loop and pump grout into the borehole, while still allowing for the borehole to be grouted from the bottom towards the top to reduce the likelihood of voids.

Abstract: Bottom members for a heat loop for an earth energy transfer system with a moving energy transfer fluid and heat loops with such a bottom member; the bottom member in one aspect including a body with a top surface and a bottom surface, the body configured for connection at a lower end of the heat loop, the bottom surface shaped to facilitate passage of the heat loop through a borehole extending down into the earth.

Abstract: Wellbore heat loop ssystems, fillers for bores in the systems, and methods of the use of such systems; the systems in certain aspects having a heat loop wellbore in the earth having heat loop pipe extending down to one side of a bottom memeber and up therefrom on another side thereof, the bottom member in certaqin aspects having a body with first and second bores therethrough, the second bore sized and configured for securement thereat of an end of coil tubing; and, in certain aspects, filler material around the heat loop in the wellbore with a gel material mixed with the water.

Abstract: A method and system for drilling creating a wellbore which, in at least certain aspects, includes positioning a drilling apparatus at a desired location at the earth surface, the drilling apparatus having rotating and hammering apparatus for simultaneously rotating and hammering a dual tubular string into the earth, the dual tubular string with an outer casing string spaced apart by an annular space from an inner drill pipe string, both the outer casing and inner drill pipe string being hollow, a drill bit secured to a lowermost end of the inner drill pipe string and, optionally, a casing drill apparatus secured at a lowermost end of the casing string, drilling through the earth to form the wellbore by simultaneously rotating and hammering the dual tubular string with the drilling apparatus; and, in certain aspects, installing a geothermal heat loop and grouting the space around it.

Abstract: A grout for use in a borehole of an earth energy transfer system between the exterior of an earth loop in the borehole and an interior wall of the borehole, the system having an energy transfer fluid moving through the loop for transferring energy with respect to the earth, the grout having, in certain aspects, sand, cement, the cement present in particles, water, and, optionally, cement setting retardant material, bentonite, material creating a repelling electrostatic charge on cement particles for reducing friction of the grout, and/or friction reducing material.

Abstract: An earth energy transfer system with a moving energy transfer fluid, the system for transferring energy for an entity, the system, in certain aspects, having apparatus and related items for measuring an amount of energy transferred for the entity to or from the moving energy transfer fluid, and apparatus and related items for invoicing the entity for the amount of energy transferred. The system, in certain aspects, including apparatus and related items for calculating a price for the amount of energy transferred, said invoicing based on said price. The system, in certain aspects, including apparatus and related items for transmitting a signal indicative of a measured amount of energy transferred from the apparatus and related items for measuring to the apparatus and related items for invoicing. Methods are disclosed for using such systems to measure and calculate an amount of energy transferred and/or to invoice an entity for the transferred energy.

Abstract: This invention relates to oil well production, particularly to a method and apparatus for downhole stimulation of oil production from a well by generating cyclic shock waves in and around the wellbore.High pressure air passes through gas supply conduit (16), downwardly through pilot passage (54) of pilot valve (48) into internal piston valve chamber (58) and high pressure chamber (30). When the pressure in chambers (58) and (30) exceed 80% of the line pressure from supply conduit (16), pilot valve (48) shifts vertically, exposing the upper end of piston valve (56) to high pressure, and thereby urging the piston valve downwardly to open the high pressure chambers (58) and (30) into the low pressure chamber (32), thus creating an abrupt charge of gas into the well.

Abstract: The stator for a helical gear device is formed of a plurality of duplicate disks. The disks each include a convoluted cavity having equally spaced symmetrically radially extending lobes for receiving the convex lobes of the rotor. The disks are assembled into the form of a stator by inserting the disks about a mandrel which includes convoluted lobes, so that the convoluted cavities of the disks follow the shapes of the lobes of the mandrel, thereby causing the disks to be progressively radially offset with respect to one another along the length of the stator. The stacked disks are inserted into a heated cylindrical housing so that the housing forms a shrink fit about the disks. The disks and housing are further connected by brazing, and the disks optionally have openings formed between the lobes which function as convoluted channels through the assembled stator for the passage of liquid, wiring, etc. through the stator.