7results about How to "Improve sand control effect" patented technology

The invention discloses an immovable string layered extrusion and circulating filling sand control string and a use method thereof, the immovable string layered extrusion and circulating filling sand control string comprises a suspension packer arranged on an oil pipe and a packing sand control unit below the suspension packer, and further comprises a filling unit arranged on the oil pipe; the packing sand prevention unit comprises an interlayer separator arranged on the oil pipe, an upper sand prevention pipe and a lower sand prevention pipe, wherein the upper sand prevention pipe and the lower sand prevention pipe are arranged above and below the interlayer separator respectively. A first filling unit is arranged between the hanging packer and the upper sand prevention pipe, and a second filling unit is arranged below the lower sand prevention pipe. After well completion, holes where sand possibly enters are blocked, the sand prevention effect is improved, one-time construction, layered extrusion and circulating filling are conducted on multiple oil layers and the immovable pipe column at the same time, the technical problem of multi-oil-layer construction safety is solved, and the production cost is reduced.

The invention provides a sand control performance test and evaluation method for a sand stabilizer, which comprises the following steps: step 1, setting the pump flow as Q0, pumping liquid into a stratum sand filling module, and recording the sand production amount; 2, after the fluid pressure is stable, liquid pumping is stopped, and the sand production amount at the moment is recorded; 3, a sand stabilizing agent is pumped into the stratum sand filling module, and the sand stabilizing agent is waited to be solidified; 4, the pump flow is set to be Q0, liquid is pumped into the stratum sand filling module again, and the sand production amount is recorded; 5, after the fluid pressure is stable, the sand production amount is recorded; and 6, the pump flow is adjusted to Q1, the steps p4-5 are repeated till the fluid pressure is stable, and the sand production amount at the moment is recorded. The method for testing and evaluating the sand prevention performance of the sand stabilizer provides an experimental method and a data processing and evaluating method for evaluating the comprehensive sand prevention performance of the sand stabilizer, can be used for sand prevention and control process design of an oil well, and provides an efficient and long-acting sand stabilization effect.

This utility model relates to the field of water pump equipment technology, specifically to a submersible motor for wells with enhanced sand-proof performance. It includes a cover plate, a motor mount, and a sand-proof device. The sand-proof device includes a sand-proof seat, a sand-throwing sleeve, wear-resistant components, and auxiliary components. The sand-proof seat is positioned between the cover plate and the motor mount. The sand-throwing sleeve is fixedly connected to the sand-proof seat. The wear-resistant components are respectively positioned on the sand-proof seat and the motor mount. By setting the sand-proof seat between the cover plate and the motor mount, and setting the sand-throwing sleeve and wear-resistant components on the sand-proof seat, the sand-proof seat has better wear resistance. When the wear resistance of the sand-proof seat is enhanced, the gap between the sand-throwing sleeve and the sand-proof seat can be maintained for a long time, preventing sand and other impurities from entering the motor mount through the gap between the sand-proof seat and the sand-throwing sleeve. Therefore, the service life of the sand-proof seat is improved, thereby improving the sand-proof performance and service life between the motor mount and the cover plate, and preventing water ingress and damage to the motor.

The utility model relates to a sand prevention valve core for an inflatable ball, belongs to the technical field of valve cores, and aims to solve the problems that in the using process of an existing inflatable ball, sand grains or particle sundries can be filled in an inflation hole of the valve core, the sand grains or particle sundries can influence normal use during inflation, and the valve core is damaged or the use of the inflatable ball is influenced. The valve core comprises a valve core body, an inflation hole penetrating through the valve core body is formed in the valve core body, a hole body, at least located at one end of the outer side of a ball body, of the inflation hole is of an air inlet small hole structure, and when the valve core body is installed on the ball body, the air inlet small hole is automatically closed and sealed under the elastic effect. According to the sand-prevention valve core for the inflatable ball, the sand-prevention effect of the ball body can be effectively improved, and the service life of the valve core and the inflatable ball is prolonged.

The sand control pad provided by the utility model comprises a bottom box and a plurality of claw rollers, and the claw rollers are arranged on the bottom box. The pet sand control mat has the advantages that the claw rollers are arranged on the bottom box and can play a supporting role, meanwhile, a pet can improve interactivity with the sand control mat by playing the claw rollers, the sand control effect is improved, in addition, sand is located under the feet of the pet, the sand can be rapidly promoted to leak out from the feet by playing the claw rollers through the claws of the pet, and the pet is more convenient to use. Further, the liquid drops on the bottom box; by arranging the claw rollers made of sisal hemp materials, the entertainment of the pet on the sand control pad can be further improved, and the sand control effect is improved; the upper cover is arranged to be buckled on the bottom box, so that the claw roller can be limited between the upper cover and the bottom box, and jumping of the claw roller is prevented; all the parts are detachably connected and are convenient to mount, replace and replace, when part of the parts are damaged, the damaged parts can be replaced, and interchangeability is good; and the gap is formed in the joint of the upper cover or the bottom box, so that the cat litter can be conveniently poured.

This application provides a coupled sand control and ecological restoration system and its construction method, relating to the fields of ecological environment restoration and sand control technology. The system includes: multiple vertically installed power generation components, arranged along the prevailing wind direction of the area to be restored, with the light-receiving surface of the power generation components perpendicular to or at an acute angle to the prevailing wind direction; sand-blocking components, laid on the surface of the area to be restored, with different laying angles at different locations within the area; and vegetation planted on the ground between the power generation components, and in the area below and / or around the sand-blocking components. This method aims to significantly improve the sand control effect, system stability, and resource utilization efficiency in desertified areas.

The invention provides high-temperature resin precoated sand for sand prevention of a heavy oil thermal production well as well as a preparation method and application of the high-temperature resin precoated sand. The high-temperature resin precoated sand for sand prevention of the heavy oil thermal production well is prepared from the following components in parts by mass: 4.2 to 5.6 parts of modified phenolic resin, 1.2 to 1.6 parts of organic silicon resin, 0.6 to 0.8 part of polyimide resin, 0.1 to 0.2 part of a reinforcing agent, 0.2 to 0.3 part of a toughening agent, 0.03 to 0.05 part of a silane coupling agent, 0.15 to 0.25 part of a catalyst and 100 parts of quartz sand. The high-temperature resin precoated sand for sand prevention of the heavy oil thermal production well can be consolidated at medium and low temperature reservoir temperatures, and the consolidated high-temperature resin precoated sand is high in compressive strength, good in permeability and excellent in sand blocking performance. The thermal decomposition temperature of the resin film of the precoated sand exceeds 390 DEG C, the precoated sand still has high strength and good thermal stability after being aged at the temperature of 300 DEG C, the sand prevention validity period can be prolonged, and the precoated sand is suitable for sand prevention of a heavy oil thermal production well.