39results about How to "Improve residency" patented technology

The invention discloses a purification granule, which comprises: a carrier and a viscous coating loaded on the carrier and having the function of degrading pollutants; the purification granule has a microporous pore structure; the purification granule utilizes the microporous pore structure It not only increases the contact area between solids and pollutants, but also makes the purification particles have a stronger adsorption capacity for pollutants, and can also make pollutants reside in the micropore pore structure to prevent them from overflowing, increasing the concentration of pollutants in the micropore pore structure. The concentration makes the viscous paint degrade the pollutants faster and purify more thoroughly, thus improving the purification efficiency of the purified particles.

The invention discloses a steam channeling plugging method for a horizontal well in thermal recovery of heavy oil, which comprises the following steps: (1) lowering a steam injection pipe string into the oil layer, adopting a general injection method, and injecting steam to preheat the formation; (2) injecting steam into the formation; High-viscosity jelly; (3) Inject silicon salt high-temperature plugging agent; (4) Repeat steps (2) and (3) until the injection pressure requirement of construction design is reached; (5) Inject steam to heat the plugging agent, and shut down the well ~5d; (6) steam injection huff and puff mining. The method of the present invention realizes the integrated pipe string of plugging, steam injection and mining, with simple construction technology and low operating cost; the alternate injection of high and low viscosity systems finally forms a process method of high residence and strong plugging, which is effective Solve the problem of low-viscosity heat-resistant plugging system channeling in the formation, improve the retention of the plugging agent, expand the plugging volume of the temperature-resistant plugging agent, effectively block the steam channeling of steam injection, and thus expand the capacity of steam injection The heating range improves the development effect of heavy oil thermal recovery horizontal wells.

The invention discloses a well kill plugging slurry used for well completion testing and a plugging method thereof, and relates to the technical field of oil and gas well completion testing engineering. Completion and killing fluid mass percentage meter, add the following components: A. Lost circulation plugging agent SDL while drilling: 4.5% to 5.0%; B. Temporary plugging agent PCC for drilling fluid: 4.0% to 5.0%; C. Composite plugging agent Agent FDJ‑Ⅰ: 3.0%~5.5%; D, flexible network fiber plugging agent AT‑FB: 0.2%‑0.5%; adjust the density of plugging slurry to 1.85 g / cm 3 -1.93g / cm 3 , with a concentration of 15.4%‑16.4%, injected into the unpacked packer in positive circulation for plugging. The use of this plugging slurry can not only prevent the gap between the packer and the casing from being blocked, resulting in failure to set or unseal smoothly, but also prevent the jamming of the perforation test string caused by the blockage of the gap between the detonation impact rod of the perforating gun and the tubing ACCIDENT.

The invention provides a temperature-sensitive adhesive bridging plugging system, a plugging slurry, a preparation method and application thereof. The temperature-sensitive adhesive bridging plugging system of the present invention is characterized in that it comprises the following raw materials in mass percentage: 20-50% of temperature-sensitive adhesive resin particles, 20-30% of rigid granular materials, and 20-30% of elastic granular materials 30%, fiber material 10‑20%. The present invention also provides a method for preparing lost circulation slurry, comprising the steps of: adding temperature-sensitive adhesive resin particles, rigid particle materials and elastic particle materials into clear water or drilling fluid, stirring at high speed until uniform dispersion; then adding fiber The materials are stirred at a low speed until they are uniformly dispersed, and then the temperature-sensitive adhesive bridging plugging slurry is obtained. The plugging slurry of the present invention has a high success rate of one-time plugging and effectively avoids re-leakage, and overcomes the problems of low strength of the accumulated plugging layer formed in cracks by conventional bridging plugging materials and being easily affected by pressure fluctuations, resulting in plugging failure.

The invention provides a temperature-sensitive adhesive resin plugging agent as well as its preparation method and application. The temperature-sensitive adhesive resin plugging agent comprises the following raw materials in parts by mass: 75-90 parts of a thermoplastic resin matrix, 5-15 parts of a melting temperature regulator, 2-8 parts of an organic lipid melting range regulator, and 0.5-6 parts of permanent solid-phase filling melting range regulator, and 0-30 parts of modified density regulator. The temperature-sensitive adhesive blocking agent of the present invention is based on different types of thermoplastic resins. When the temperature reaches the melting point of the blocking agent particles in the water phase, the surface of the blocking agent particles begins to melt and has a certain viscosity. Particles can be bonded to each other, and the particles of the lost circulation agent can also be bonded to the wall of the lost channel of the drilling fluid, which not only enhances the residence ability of the lost lost circulation agent in the lost channel, but also improves the overall density of the particles of the lost circulation agent accumulated in the sealing layer. Strength, making it less susceptible to pressure fluctuations, improving the success rate of one-time plugging and effectively avoiding re-leakage.

The invention relates to an electrolytic microbubble generating device based on a micro-drill-bit micro-pit electrolytic micro-bubble on the electrode wall, and relates to the technical field of active drag reduction of underwater vehicles. It includes a substrate, a carbon rod and a regulated DC power supply. The surface of the substrate is provided with a micro-pit structure on the electrode wall, the upper surface of the substrate is covered with a polyimide coating, and the lower surface of the substrate is connected to a regulated DC power supply through a power wire. The negative pole of the carbon rod is connected to the negative pole of the regulated DC power supply. By electrolyzing NaCl solution, the self-adaptive control of microbubble growth can be realized without continuous and long-term gas injection. When the microbubble breaks, falls off or the gas-liquid interface is lower than the laid polyimide coating, the device will automatically trigger The electrolytic circuit realizes adaptive control of micro-bubbles, and is suitable for surface ships and underwater vehicles; it can stably maintain micro-bubbles, which is beneficial to practical engineering and military applications.