5 results about "Temporary seal" patented technology

The application discloses a kind of underground main structure modular temporary plugging wall and its construction method, and plugging wall includes: the connecting reinforcement for being arranged at the port of underground main structure, for assisting to strengthen positioning plugging wall overall structure;Prefabricated concrete module, including square module main body, module interconnection mechanism, pre-embedded handle, reinforcing rib plate, water stop unit;The module interconnection mechanism includes the groove being opened in the periphery of the module main body, the connecting reinforcement being fixedly connected with module main body and the end being elongated into the groove, the interconnection component for the interconnection of connecting reinforcement between modules;By using modular prefabricated concrete structure assembly to form temporary plugging wall, effectively solve the technical problem that traditional retaining wall needs to use large mechanical equipment to break, cause pre-embedded component and waterproof layer to cause damage, enhance the safety of construction, ensure the structure connection quality, simultaneously detachable module group can realize reuse, with green environmental protection effect.

This invention discloses a method for forming an internal curved flow channel in a PDC (Polymer Diode Cartridge) drill bit. First, a specially shaped bend is designed and fabricated, with dimensions identical to the curved flow channel. Second, the specially shaped bend is assembled into the drill bit mold and temporarily sealed. Then, material is loaded into the drill bit mold and sintered. Finally, the mold is opened to remove the temporary seal, forming the curved flow channel. The specially shaped bend is formed using 3D printing or hot bending. The 3D printing material is nickel-based tungsten carbide, nickel-based high-temperature alloy, or steel, while the hot bending material is low-carbon steel or low-carbon alloy seamless steel pipe. Before assembly with the drill bit mold, the bend is filled with resin sand and cured at 200-300℃. The process of loading, sintering, and mold cleaning produces a precision-controlled internal curved flow channel. This invention provides a new solution for installing high-pressure or ultra-high-pressure nozzles on the cutter wings of a PDC drill bit, significantly improving downhole rock-breaking efficiency.

The present application relates to a kind of water plugging methods of screen gravel filling self-flowing oil well, including accurate identification water layer section by comprehensive well logging, production logging and numerical simulation data;Determine packer setting position based on well condition and indoor experiment;Design coiled tubing and tubing annulus injection temporary plugging agent temporary sealing upper oil production layer and gravel packing annulus, while injecting temporary plugging agent, coiled tubing injects certain viscosity preflush, prevent temporary plugging agent from entering bottom water production layer, prevent subsequent main blocking agent damage;Determine preflush viscosity according to reservoir permeability simulation sand filling pipe test.Determine main blocking agent injection time according to temporary plugging agent gel time, ensure that main blocking agent enters water production layer after gelation.Main blocking agent needs to have lower viscosity, to ensure that it enters water production layer first, and forms high-strength plugging barrier;Finally, release packer and induce flow.This application has achieved the beneficial effects: realize the deep precise plugging of water production layer, maximize the protection of oil production layer, effectively extend the self-flowing period of oil well and improve the recovery of crude oil.

The invention relates to the technical field of plate drilling, and discloses an office table machining plate drilling device which comprises a machining table and further comprises a support fixedly connected to the bottom of the machining table and used for supporting the machining table; the blockboard is placed above the processing table; and the adjusting mechanism is arranged on the machining table and used for moving the punching mechanism installed on the adjusting mechanism to punch the blockboard. When the woodworking board is punched and a drill bit is in contact with the board, a temporary sealed cavity tightly attached to the surface of the board is formed to completely surround a dust production point, and air is directly pumped from the sealed cavity through external negative pressure equipment, so that wood chips and dust generated during drilling are captured at a production source, and the dust is prevented from being damaged. The problem of dust diffusion in traditional processing is solved, the health of operators is effectively protected, the dust explosion risk is avoided, meanwhile, the cleanness of equipment and workshop environment is kept, and the high-standard requirements of modern green production and occupational health and safety are met.

The invention relates to a method for manufacturing battery cells (30) that are provided with a filling opening (38) on an accessible side. The following process steps are carried out: First, the battery cells (30) are filled (10) with an electrolyte and the filling openings (38) are temporarily closed. Then, the battery cells (30) are introduced into a processing station (40) comprising a drying chamber (24), the filling openings (38) of the battery cells (30) are opened, and degassing devices (52) are connected to the battery cells (30). Subsequently, the battery cells (30) are removed from the processing station (40), and a forming process (34) is carried out on the battery cells (30), with simultaneous removal of gases generated during the forming process (34) outside the processing station (40).The formed battery cells (30) are then introduced into the processing station (40), the degassing device (52) is removed from the battery cells (30), and the filling openings (38) of the battery cells (30) are temporarily sealed. Electrolyte is then added to the formed battery cell (30) after the temporary seal is removed. Finally, the filling openings (38) of the battery cells (30) are sealed with a material-locking seal, which is carried out outside the processing station (40).