4results about How to "Improve water injection efficiency" patented technology

The utility model relates to the technical field of salt mine drilling accessories, concretely to salt mine drilling water solution mining anti -blocking water injection head, including the water injection pipe head of salt mine drilling water solution mining, the top end coaxial of water injection pipe head is provided with the connecting socket, the bottom coaxial of water injection pipe head is installed with the water injection end, the utility model discloses the water injection pipe head and the water injection cavity that sets up inside it are set up, cooperate the anti -blocking water injection inner tube of embedding in the bottom of water injection pipe head and the spiral feeding rod of installing in the anti -blocking water injection inner tube, make when salt mine drilling water solution mining, the deceleration motor can drive spiral feeding rod to rotate continuously in the anti -blocking water injection inner tube, effectively prevent solid particles or impurities from accumulating and blocking at the water injection end when salt mine drilling, the water inlet hole of anti -blocking water injection inner tube outer wall opening guarantees the water in water injection cavity can smoothly enter anti -blocking water injection inner tube and transport to the water injection end, and the connecting socket of water injection pipe head top end coaxial setting is convenient for with external water injection equipment stable connection.

The invention discloses a well selection method and system for ultra-low permeability reservoir water injection well updating, and belongs to the technical field of oilfield development. The well selection method comprises the following steps that a target oil reservoir water injection well updating potential evaluation system is established; obtaining index parameters in the target oil reservoir water injection well update potential evaluation system corresponding to the target oil reservoir water injection well update candidate well, and normalizing the index parameters; and determining a potential comprehensive evaluation index of the updated to-be-selected well of each water injection well of the target oil reservoir, and determining a planned implementation well according to descending order arrangement. The method can solve the problems of low manual well selection efficiency, high individual subjectivity and large result difference at present, and ensures the implementation effect of updating of the water injection well.

The utility model discloses a removable integrated intubation water injection bridge plug, which comprises an upper joint, a hydraulic cylinder, a mandrel, a piston, a push cylinder, an intubation tube, a bridge plug central tube and a setting mechanism, and the upper hydraulic cylinder is sleeved on the periphery of the middle lower part of the upper joint and is fixed through an anti-setting shear pin; an upper mandrel is screwed below the upper joint, and a cylinder bottom of an upper hydraulic cylinder is sleeved on the periphery of the upper mandrel; the upper part of the lower mandrel is connected with the lower end of the upper mandrel; the upper expanding section of the lower mandrel is connected with the piston; the lower hydraulic cylinder is connected with the upper hydraulic cylinder, the push cylinder is connected to the lower end of the lower hydraulic cylinder and abuts against the position above the setting mechanism, and the insertion pipe is connected to the lower end of the lower mandrel. The bridge plug central pipe sleeves the periphery of the insertion pipe and is connected with the insertion pipe through a releasing shear pin; the setting mechanism is sleeved on the periphery of the bridge plug central pipe, and the parallel ring guide shoe is screwed at the lower end of the bridge plug central pipe; the sliding sleeve check valve is inserted into the lower port of the bridge plug central pipe and is fixed through a sliding sleeve shear pin. According to the tool, bridge plug setting and intubation water injection can be completed by one tubular column, and drilling and grinding can be used for unblocking during unblocking without being influenced by shaft scaling and corrosion.

This utility model relates to the field of tunnel construction technology, specifically to a vacuum-assisted water pumping system. It includes a centrifugal pump with a pump casing containing an impeller rotatably connected inside. The pump casing has an exhaust port on its top. The system also includes a water tank with an inlet; a vacuum pump with its inlet pipe connected to the exhaust port of the pump casing and its outlet pipe connected to the inlet of the water tank. The vacuum pump, water tank, and centrifugal pump are interconnected. This utility model overcomes the technical problems of existing centrifugal pumps requiring manual water injection before startup, which is time-consuming, labor-intensive, and slow to respond quickly. Furthermore, it easily leaves air bubbles inside the pump casing, leading to low pumping efficiency and cavitation.