A hydraulic fracturing plan executable by a hydraulic fracturing system to hydraulically fracture at least first and second wells. In one or more embodiments, executing the hydraulic fracturing plan includes opening a first valve while hydraulic fracturing fluid is communicated to the second well via a second valve and a manifold, the first valve being associated with both the first well and the manifold, and the second valve being associated with both the second well and the manifold. In one or more embodiments, executing the hydraulic fracturing plan further includes closing the second valve, wherein the second valve is closed after opening the first valve, and while hydraulic fracturing fluid is communicated to the first well via the first valve and the manifold.

A hydraulic fracturing plan executable by a hydraulic fracturing system to hydraulically fracture a plurality of oil and gas wells.

A bearing greasing assembly for simultaneously greasing a plurality of bearings includes an agricultural implement which includes a frame and a plurality of rotating tilling. Each of the plurality of rotating tilling elements includes a bearing which has a grease input. A supply grease conduit is attached to the frame of the agricultural implement and the supply grease conduit has a zerk. A grease gun can be fluidly attached to the zerk to pump grease into the supply grease conduit through the zerk. The supply grease conduit branches into a plurality of outputs which is each in fluid communication with a respective one of the plurality of bearings. In this way each of the plurality of bearings can receive grease from the zerk.

A dental handpiece oiling machine includes a lubricating oil delivery circuit, a gas delivery circuit, and an atomizer. The atomizer is respectively connected to the lubricating oil delivery circuit and the gas delivery circuit and includes a gas acceleration structure used for sharply accelerating gas from the gas delivery circuit to form a high-speed gas flow and an atomization structure used for atomizing lubricating oil from the lubricating oil delivery circuit under the action of the high-speed gas flow to form oil mist which is delivered to dental handpieces. Since lubricating oil is broken into mist-like particles by the high-speed gas flow, oil and gas are sufficiently mixed, sufficient lubrication can be realized merely with a small amount of oil, and environmental pollution is greatly reduced; and an oil pump is not needed, so the dental handpiece oiling machine has a simple structure and a long service life.

A holding member configured to hold an injection portion and an imaging unit of an insertion portion in a state in which the injection portion and the imaging unit are arranged side by side includes an injection-portion insertion portion configured such that the injection portion is press-fitted into the injection-portion insertion portion and an imaging-unit insertion portion configured such that the imaging unit is press-fitted into the imaging-unit insertion portion. The insertion portion is configured to be inserted toward a corresponding portion in a narrow space while being gripped by an operator. The injection portion has a cylindrical shape and is provided with a fluid substance injection port at a tip end portion. The imaging unit has a cylindrical shape and is configured to capture an image including the tip end portion of the injection portion and its surrounding environment.

A method and apparatus for moving pipe rehabilitation objects, such as a pipe liner through a host pipeline. Flexible tubing is used to connect to the pipe rehabilitation object and to apply a force to cause the pipe rehabilitation objection to move through host pipeline. The flexible tubing is also capable of conveying a fluid, such as a lubricant through the tubing.

A dental handpiece oiling machine includes a lubricating oil delivery circuit, a gas delivery circuit, and an atomizer. The atomizer is respectively connected to the lubricating oil delivery circuit and the gas delivery circuit and includes a gas acceleration structure used for sharply accelerating gas from the gas delivery circuit to form a high-speed gas flow and an atomization structure used for atomizing lubricating oil from the lubricating oil delivery circuit under the action of the high-speed gas flow to form oil mist which is delivered to dental handpieces. Since lubricating oil is broken into mist-like particles by the high-speed gas flow, oil and gas are sufficiently mixed, sufficient lubrication can be realized merely with a small amount of oil, and environmental pollution is greatly reduced; and an oil pump is not needed, so the dental handpiece oiling machine has a simple structure and a long service life.

A seal cartridge assembly of a sealing system may include a seal cartridge having a first side surface, a second side surface, opposite to the first side surface, a circumferential inner surface extending from the first side surface to the second side surface, the circumferential inner surface having a first seal-receiving portion, adjacent to the first side surface, a second seal-receiving portion, adjacent to the second side surface, and a protrusion portion between the first seal-receiving portion and the second seal-receiving portion, and at least one grease passage having one opening on the first side surface and another opening on the protrusion portion of the circumferential inner surface. The assembly may also include a first seal provided within the first seal-receiving portion of the circumferential inner surface, and a second seal provided within the second seal-receiving portion the circumferential inner surface.