10results about How to "Reduce embedding" patented technology

The invention provides a fracturing process method for a horizontal well to laterally penetrate through a mudstone communication oil layer. The fracturing process method mainly solves the problem that due to the fact that an existing sandstone layer section fracturing process method is adopted, the length of a crack formed in mudstone is not enough, and a wellbore and lateral oil-containing sandstone cannot be effectively fractured. The method is characterized by comprising the following steps that S1, a fracturing wellhead is installed, and a fracturing manifold and a vehicle set are connected; s2, performing pressure test on a surface pipeline and a gate until the pressure is qualified; s3, perforation is conducted on the target interval; s4, main fracturing construction is started, and an artificial fracture is formed to communicate with a lateral oil layer; s5, all fracturing construction of the remaining sections of the target horizontal well is completed section by section; and S6, after construction of all designed target layer sections is completed, the well is closed, and flowback is conducted according to design requirements. According to the fracturing process method for laterally penetrating through the mudstone communication oil layer of the horizontal well, it can be ensured that an effective oil flow channel is formed between the shaft and the oil layer, effective utilization of the lateral oil layer is achieved, and the production requirement of the lateral oil layer is met.

The utility model discloses a kind of semiconductor polishing liquid anti-deposition devices, including the storage tank for storing semiconductor polishing liquid, the side surface of the storage tank is equipped with circulation conveying component for semiconductor polishing liquid circulation, rotating drive component is installed on the position of the storage tank and corresponding the circulation conveying component, the bottom of the storage tank is also equipped with agitating component for semiconductor polishing liquid agitation, the circulation conveying component includes fixedly connected in the bottom of the side surface of the storage tank circulation pump, conveying pipe is installed on the circulation pump, rotatable annular pipe is connected to the other end of the conveying pipe.The utility model is by circulation pump and is sent to annular pipe by conveying pipe in the storage tank polishing liquid and is evenly sprayed by spray head, positive and negative rotation motor drives driving link to make annular pipe reciprocating rotation expand spraying range, while agitating motor drives agitating blade to agitate the polishing liquid in the storage tank, ensure its uniform distribution.

The invention provides a preparation method of a negative electrode active material, the negative electrode active material, a negative electrode plate and a secondary battery. The preparation method comprises the following steps: obtaining a precursor; pre-treating the precursor to obtain a pre-treated material; carrying out carbonization treatment on the pretreated material to obtain a negative electrode active material; the precursor comprises saccharides containing a furan ring structure and a zinc source; in the carbonization treatment process, a C-O-Zn intermediate structure is formed. The negative electrode active material prepared by the preparation method has higher specific capacity and more excellent rate capability, and the preparation method is simple in process, low in cost and easy for large-scale production.

The present invention provides a negative active material, a preparation thereof, a negative pole piece, a battery and a device wherein the negative active material comprises graphite and a coating layer located on the surface of the graphite and comprising amorphous carbon, the graphite satisfies the following relational expression: 0.25 < = (I3R (101) * 15 / 12) / (I3R (101) * 15 / 12 + I2H (101)) < = 0.5, the I3R (101) is the peak intensity of an X-ray diffraction peak of a diamond phase 101 crystal face of graphite in the negative electrode active material, and the I2H (101) is the peak intensity of an X-ray diffraction peak of a hexagonal phase 101 crystal face of graphite in the negative electrode active material. The lithium ion secondary battery including the negative electrode active material of the present invention has an excellent cycle life.

The invention discloses a preparation method of D-allose, and relates to the technical field of D-allose production, after a D-allose conversion solution is subjected to centrifugation, decoloration, desalination, concentration, chromatographic separation and re-concentration, ethanol is added in batches for segmented cooling crystallization, suction filtration and ethanol washing to obtain white crystals, and the white crystals are dried to obtain the D-allose. The production cost is reduced, the obtained product is good in crystal form, and the product quality is improved.

This invention discloses a hybrid optical cable combining hollow-core and solid-core optical fibers and its fabrication method, belonging to the field of low-carbon, high-density optical cable technology. It includes a central skeleton with multiple spirally arranged grooves along its circumference. Multiple first optical units are housed within each groove, and each first optical unit includes multiple hollow-core optical fibers and a flexible sleeve. Multiple second optical units are stranded around the outer periphery of the central skeleton, with the stranding direction opposite to the spiral arrangement direction of the grooves. Each second optical unit includes multiple solid-core optical fibers, which can be G.652D, G.654E, G.655, G.657A, etc., forming a hybrid optical cable. This invention solves the problem of accommodating hollow-core optical fibers through the cooperation of the central skeleton and the flexible sleeve. By reverse-stranding the second optical units, the possibility of the second optical units embedding into the grooves is reduced, avoiding pressure on the flexible sleeve. Furthermore, the shared use of solid and hollow optical fibers effectively improves the overall fiber core density of the optical cable.

The utility model discloses a geotechnical composite drainage net capable of preventing geotechnical cloth from being embedded, which belongs to the technical field of geotechnical composite drainage nets and comprises a supporting mechanism arranged in a drainage channel and non-woven cloth arranged on the supporting mechanism. The supporting mechanism comprises a supporting plate placed in the drainage channel and sawtooth blocks fixedly installed on the supporting plate and making contact with the non-woven fabric, at least four sawtooth blocks are provided with limiting mechanisms used for limiting the position of the non-woven fabric, and the supporting mechanism further comprises protruding blocks fixedly installed on the sawtooth blocks and making contact with the non-woven fabric. Through cooperative use of all the devices, the supporting plate supports the whole non-woven fabric through the sawtooth blocks, after the non-woven fabric is installed, the non-woven fabric is limited through the limiting mechanism, then embedding of the non-woven fabric is reduced, the whole drainage net is more stable and firmer through the supporting plate, and the situation that the drainage net is compressed easily and blocked is avoided; the situation that the drainage net is prone to collapse is avoided, and stability is higher.

The invention relates to a skirt-edge-free end cover structure and a reverse osmosis membrane element, and relates to the field of reverse osmosis membranes, the skirt-edge-free end cover structure comprises an end cover, the end cover comprises a middle ring sleeve, an outer ring sleeve and a plurality of rib plates, the middle ring sleeve and the outer ring sleeve are coaxially arranged, the rib plates extend in the radial direction of the middle ring sleeve, and the rib plates are evenly distributed around the circumference of the middle ring sleeve; the two ends of each rib plate are fixedly connected with the outer circumferential face of the middle ring sleeve and the inner circumferential face of the outer ring sleeve correspondingly. At least three embedding grooves which are axially distributed at intervals are formed in the peripheral surface of the outer ring sleeve, and the distance between the surfaces of the rib plates and one end face of the outer ring sleeve ranges from 1 mm to 3 mm. According to the application, the constraint on the large-diameter membrane unit piece can be reduced, and the situation of glass fiber embedding caused by an overlarge gap can be reduced.

This invention relates to a graphite anode material with an in-situ grown onion carbon layer structure and its preparation method. The core of the graphite anode material is graphite, and the outer shell is an in-situ grown onion carbon layer with a thickness of 1 nm to 1000 nm; the particle size of the graphite anode material ranges from 500 nm to 100 μm. By growing a complete onion carbon layer on the surface of graphite particles, the embedding of polar molecules in the electrolyte is reduced. Compared to the currently commonly used method of coating amorphous carbon, the onion carbon layer grown on the surface of graphite particles has a smaller specific surface area, resulting in a thinner and more uniform SEI film, which can further reduce irreversible capacity.