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82 results about "Temporary seal" patented technology

Manifold for use in cleaning combustion turbines

The present invention is directed to a manifold for temporarily blocking the air intake of the compressor section of a combustion turbine to facilitate cleaning. A manifold suitable for providing a temporary seal about the air intake of the compressor section and through which a foamed cleaning solution can be pumped is disclosed. The manifold is conveniently provided as a flexible manifold body having an inflatable tubular member along the periphery thereof for sealing with the air intake and a plurality of hose connections through which a foamed cleaning solution can be delivered to the compressor section of the combustion turbine. Particulate films and contaminants adhering to the internal components of the compressor section of a turbine are readily removed by pumping a foamed cleaning solution such as a foamed, aqueous surfactant solution through the manifold and into the compressor section. Contaminants resulting from fuel combustion and deposited in the combustion and turbine sections are removed by pumping a second, foamed cleaning solution through those sections. The second solution typically comprises a foamed, aqueous acid solution optionally including a corrosion inhibitor. The compressor section must be isolated from such acid solutions, e.g. by pumping the foamed surfactant solution through the manifold and compressor section prior to and simultaneously with pumping the foamed acid solution through the combustion section.
Owner:GENERAL ELECTRIC CAPITAL AS AGENT

Composite salt low-activity anti-sloughing drilling fluid and construction method thereof

InactiveCN103146363AAvoid differential pressure lossThe system has strong chemical inhibition and anti-collapse effectDrilling compositionSealing/packingFriction reductionMass ratio
The invention discloses a composite salt low-activity anti-sloughing drilling fluid and a construction method thereof. The composite salt low-activity anti-sloughing drilling fluid consists of the following raw materials in percentage by mass: 0.2-0.3% of drilling fluid viscosifier, 2-3% of carboxymethyl starch, 1.5-2% of aqueous dispersion cation emulsified asphalt, 0.2-0.3% of anti-salt anti-calcium filtrate reducer, 1% of sulfonated phenolic resin, 2% of acid-soluble temporary seal reservoir protective agent, 1% of superfine calcium, 0.1% of caustic soda and the balance of clean water. In construction, the composite salt accounting for 5-15% of the dosage of the composite slat low-activity anti-sloughing drilling fluid is added, and the composite salt is formed by mixing sodium formate and sodium chloride at a mass ratio of 2:1. By utilizing the composite salt, the function of chemically suppressing mudstone and preventing sloughing in the drilling fluid as well as the density of the drilling fluid are improved. With strong chemical suppression and low solid phase, the composite salt low-activity anti-sloughing drilling fluid completely meets the strict high-quality requirements of a long open-hole section for friction reduction and resistance reduction of the drilling fluid.
Owner:中国石油集团川庆钻探工程有限公司长庆钻井总公司

Double-split starting method of small-clearance double-line tunnel shield

PendingCN110748349ASmall construction cross-effectsRelieve schedule pressureMining devicesUnderground chambersArchitectural engineeringStructural engineering
The invention discloses a double-split starting method of a small-clearance double-line tunnel shield. The method comprises the following steps that arranging a starting station main body structure, backfilling and reinforcing a starting end, installing a temporary seal of a tunnel door, installing a starting frame, assembling and debugging a shield, installing a reaction frame, installing a negative ring segment, and performing starting trial tunneling of the shield. According to the method, the reasonable space layout is carried out on a starting station structure well, temporary reverse hidden excavation pilot tunnel is constructed to assist split starting, the shield starting frame, the reaction frame and the negative ring segment are sequentially installed, the split starting construction of the double-line small-clearance tunnel shield under the condition that the whole starting is difficult due to the insufficient space of a site is realized, and engineering practice verifies that the split starting method has the advantages of small construction cross influence, small influence on the surrounding environment, reduction of construction period pressure, safety, reliability and the like, and can be applicable to projects with insufficient length of the end well of the subway shield starting vehicle station.
Owner:中铁隧道集团一处有限公司 +1

Anti-oxidation batch filling system for coating material production line and filling method thereof

The invention discloses an anti-oxidation batch filling system for a coating material production line and a filling method thereof. The anti-oxidation batch filling system for the coating material production line comprises a conveying device, a piston type filling head, an air exhausting device, a nitrogen supplying source, a coating material supplying source and a barrel lid buckling mechanism. The piston type filling head partially extends into a coating material barrel, so that a variable coating material filling space is formed between the bottom of the piston type filling head and the inner bottom of the coating material barrel. The air exhausting device is used for exhausting air in the variable coating material filling space. The nitrogen supplying source is used for feeding nitrogen into the variable coating material filling space to enable the variable coating material filling space to form a nitrogen filling environment. The coating material supplying source is used for filling the variable coating material filling space in the nitrogen filling environment with the coating material. A temporary seal barrel lid is buckled to a mouth of the coating material barrel through the barrel lid buckling mechanism to seal the coating material barrel containing the coating material. By the adoption of the anti-oxidation batch filling system for the coating material production line, the manner that the air is exhausted and then the nitrogen is filled is adopted, so that the variable coating material filling space of the coating material barrel can form the nitrogen filling environment, and therefore the phenomenon that the coating material is in contact with the air and is oxidized in the filling process is avoided.
Owner:江苏金鼎建设集团有限公司

Shield with-water receiving tunnel hole temporary sealing device and shield with-water receiving tunnel hole temporary sealing method

The invention discloses a shield with-water receiving tunnel hole temporary sealing device, which comprises a plurality of bases, a spring steel plate beam and a plurality of press plates, wherein the bases are uniformly distributed on the circumference of an embedded steel ring; the spring steel plate beam comprises one or a plurality of spring steel plate layers; a plurality of spring steel plates form an annular structure; the length of each spring steel plate is smaller than the radius of the embedded steel ring; the press plates are uniformly distributed on the spring steel plate beam and are in opposite arrangement to the plurality of bases; and one end of each press plate is bent at a certain radian in a direction towards a receiving well. The invention also discloses a shield with-water receiving tunnel hole temporary sealing method. The temporary sealing device achieves the goal of blocking the stratum water and soil loss through tightly attaching the spring steel plates onto the shield outer wall and the duct piece outer wall by the self rebounding force. The temporary sealing method solves the problem of tunnel hole sealing implementation difficulty under the with-water receiving condition, and has the advantages that the operation is simple; the labor is reduced; and the efficiency is improved, so that a good tunnel hole temporary sealing effect is achieved.
Owner:CCCC SECOND HARBOR ENG +1
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