8results about How to "Good plugging effect" patented technology

This invention relates to the field of oil drilling, specifically to a conjugated diene and a plugging gel based on the conjugated diene, and a method for preparing the same. The conjugated diene has a structure as shown in Formula I, and the plugging gel comprises a polymer obtained by monomer polymerization of the conjugated diene, alkenyl amide, and alkenyl sulfonic acid. The plugging gel based on this conjugated diene exhibits excellent resistance to dilution, temperature, salt, and calcium, making it suitable for plugging operations in high-temperature deep wells, especially in high-temperature lost circulation formations with highly mineralized water layers. Formula I

The invention provides a temporary plugging agent and a preparation method thereof. Raw materials of the temporary plugging agent comprise resin and modified particles, and raw materials of the modified particles comprise rigid particles wrapped by composite membranes and a modifier; the modifier is a mixture containing a silane coupling agent and a film-forming agent; the composite membrane is prepared from polyethyleneimine, polyallylamine hydrochloride and nano silicon dioxide. The preparation method of the temporary plugging agent comprises the following steps: sequentially immersing rigid particles into a polyallylamine hydrochloride solution, a nano silicon dioxide dispersion liquid, a polyethyleneimine solution and a nano silicon dioxide dispersion liquid, and repeating for 20-100 times to obtain rigid particles wrapped by a composite film; mixing the rigid particles wrapped by the composite film, a silane coupling agent and a film-forming agent, and heating to obtain modified particles; and mixing the modified particles with resin, and curing to obtain the temporary plugging agent. The temporary plugging agent provided by the invention has good toughness and relatively high strength, and can be used for plugging the interior of a crack through good deformability.

The application discloses a coal mine underground integrated intelligent circulating leak-stopping system, which comprises a single-bag pipeline cleaning and plugging device, a two-plugging-one-injection hole sealing device and an intelligent circulating leak-stopping pump truck, two pipeline fixing sleeves are symmetrically arranged at the left and right ends of the bag of the single-bag pipeline cleaning and plugging device, the right ends of a leak-stopping pipe and a water injection cleaning pipe are connected with a leak-stopping and cleaning conversion valve, the right end outlet of the leak-stopping and cleaning conversion valve is arranged in a fissure sealing section, and the left end of the leak-stopping pipe is connected with the intelligent circulating leak-stopping pump truck. The leak-stopping and cleaning conversion valve is used for realizing the circulating operation of leak-stopping and cleaning of the fissure sealing section, timely cleaning of the leak-stopping pipe can effectively prevent the leak-stopping pipe from being blocked, the grouting leak-stopping effect is greatly improved, meanwhile, the automatic control of the circulating grouting leak-stopping is realized through the intelligent controller, the working strength is reduced, the working failure in the leak-stopping grouting work is reduced, the normal grouting leak-stopping work is ensured, and the leak-stopping effect and the leak-stopping efficiency are further improved.

The invention relates to the technical field of heavy oil thermal recovery reagents, in particular to a strong emulsion system for assisting viscosity reduction and plug removal as well as a preparation method and application thereof. The strong emulsion system is prepared from the following raw materials in percentage by mass: 2%-10% of sorbitol dehydrated ester mixture, 5%-10% of 120 # solvent oil, 3%-6% of alcohol ether carboxylate, 0.5%-1.0% of ethylene glycol tert-butyl ether, 5%-10% of organic acid, 3%-6% of polybasic polycarboxylic acid, 3%-6% of villiaumite, 1%-2% of imidazoline corrosion inhibitor, 1.0%-3.0% of functional additive and 46%-76% of water. The strong emulsion system can perform deep plug removal on an underground reservoir and prevent organic acid of the strong emulsion system from being combined with heavy components in the thick oil so as to avoid formation of acid sludge, so that the plug removal effect of the strong emulsion system can be improved.

This invention discloses a self-expanding, temperature-resistant elastomer plugging agent for drilling fluids and its preparation method. The plugging agent is composed of the following components in parts by weight: 100 parts of temperature-resistant polyolefin elastomer matrix material, 5-20 parts of polymer composite modified water-absorbing reinforcing agent, 5-15 parts of carboxylated carbon nanotube-PEG water-absorbing reinforcing agent, 5-30 parts of reinforcing material, 10-30 parts of superabsorbent resin, and 0.5-1.5 parts of anti-hydrolysis agent. The plugging agent of this invention possesses excellent elasticity and a certain degree of toughness, allowing it to be squeezed into fractures under pressure. After absorbing water, its volume expands, yet it still maintains a certain degree of elasticity and strength. Under its own elasticity, it increases friction with the fracture surface, increasing the elasticity of the entire sealing layer, preventing the plugging material from flowing back or sliding deeper into the fracture, sealing the leakage channels, and achieving effective sealing of wellbore fractures.

This invention discloses a spiral-shell type fire rescue device and method for underwater emergency disaster reduction. Dike breaches are highly dangerous, necessitating the development of simple rescue equipment operable by non-professional personnel. This invention, before a breach forms, uses water pressure to press a water-retaining plate against the upstream slope of the dike, quickly sealing leaks. By splicing multiple devices together, the equipment can be stabilized on the upstream side of the dike, forming a long, narrow rescue platform, and the water-retaining plate can be used to quickly seal the breach, increasing the rescue operation space. This invention effectively solves the problems of difficulty in locating leaks in the early stages of seepage, increasing the sealing area, and addressing the issue that a single device cannot be stabilized on the upstream side of the dike to complete the rescue task when the breach length is large, thus improving rescue efficiency.

The utility model relates to the technical field of ring network switch cabinets, and discloses an anti-misoperation ring network switch cabinet comprising a cabinet body, the left side of the front surface of the cabinet body is movably connected with a first cabinet door through a hinge, the right side of the front surface of the cabinet body is movably connected with a second cabinet door through a hinge, and the back side of the first cabinet door is fixedly connected with a fixed seat. And the back side of the second cabinet door is fixedly connected with a limiting seat, a guide hole is formed in the left side of the fixing seat, a guide rod is arranged in an inner cavity of the guide hole in a penetrating mode, and the surface of the guide rod is sleeved with a reset spring. According to the anti-misoperation looped network switch cabinet, a reset spring restores deformation due to force loss, extends rightwards and drives a guide rod to move rightwards, the guide rod drives an insertion rod to move rightwards through a movable plate, after the right side of the insertion rod is inserted into an inner cavity of an insertion groove, a powerful magnetic attraction block is taken down, and the overall structure cannot be opened in appearance; therefore, the risk of misoperation of external personnel is remarkably reduced.