5results about How to "Improve flowback capacity" patented technology

The application provides a solar power wireless electric control adjustable flow valve system, and belongs to the technical field of oil and gas well ground throttling pressure control. The system comprises an erosion-resistant adjustable flow valve, an electric actuator, an electric control box and a solar power supply system. The solar power supply system supplies power to the electric control box, and the electric control box controls the adjustment of the erosion-resistant adjustable flow valve nozzle aperture through the electric actuator. The application collects wellhead pressure through a pressure sensor and transmits pressure data to the electric control box in real time. The electric control box controls the electric actuator according to real-time pressure changes, thereby controlling the automatic adjustment of the erosion-resistant adjustable flow valve Φ2-25 mm nozzle aperture. At the same time, the solar power supply system (containing a battery pack) automatically provides sufficient power to the electric control box, thereby ensuring the normal operation of the entire solar power wireless electric control adjustable flow valve system.

The invention discloses a recoverable quasi-interpenetrating network foam fracturing fluid which comprises the following components in percentage by mass: 2-4% of a multi-effect agent, 0.1-2% of a thickening aid, 1-2% of a clay stabilizer, 0.5-2.5% of an iron ion stabilizer, 0.05-0.5% of an enhancer and the balance of water, the multi-effect agent is selected from one or a mixture of more of cocamidopropyl dimethylamine, oleamide propyl dimethylamine, fatty acid amide propyl dimethylamine and erucamide propyl dimethylamine; under the stimulation of CO2, the multi-effect agent obviously reduces the surface tension of the fracturing fluid base fluid, improves the foaming capacity of the foam fracturing fluid, can form wormlike micelles in the base fluid, and greatly improves the stability of foam. The reinforcer is modified nano cellulose, can form hydrogen bonds with the multi-effect agent on an interface, improve the adsorption density of the multi-effect agent and reinforce the foaming capacity, and can also form a quasi-interpenetrating network structure with the wormlike micelles in a liquid film to further improve the stability and the sand-carrying capacity of the foam fracturing fluid, and the foam fracturing fluid can be recycled for multiple times.

The invention discloses a gas reservoir fracturing fluid rock modification system as well as a preparation method and application thereof, and belongs to the technical field of oil and gas reservoir fracturing fluids. The gas reservoir fracturing fluid rock modification system provided by the invention is prepared from the following raw materials in percentage by volume: 0.001 to 0.2 percent of rock modifier, 0.1 percent of cosolvent, 10 percent of mutual solvent, 0.1 percent of glacial acetic acid, 2 percent of cross-linking agent and the balance of water. According to the gas reservoir fracturing fluid rock modification system, hydroxyl groups on the surface of rock can be replaced by strong hydrophobic groups, the wetting angle of a rock interface to water is increased, and the flow-back efficiency of the gas reservoir fracturing fluid is greatly improved.

The utility model belongs to the technical field of underground construction devices for oil-water wells in oil fields, and particularly relates to an underground high-pressure water jet unblocking and flowback device for oil-water wells in oil fields. Comprising an oil pipe, a plug valve, a sliding wellhead, a flowback device, a packer, a high-pressure water jet device and a circulating valve are installed on the oil pipe from top to bottom, a sleeve is installed below the sliding wellhead, the flowback device is provided with a formation liquid suction inlet, the formation liquid suction inlet is communicated with a nozzle through a formation liquid channel, and the nozzle is communicated with a negative pressure cavity. The negative pressure cavity is communicated with a diffusion cavity and a mixed liquid channel, the outer side of the high-pressure water jet device is rotationally connected with a rotary outer sleeve, a plurality of water outlet holes are formed in the high-pressure water jet device, and a plurality of eccentric water holes are obliquely formed in the rotary outer sleeve. According to the utility model, the unblocking and flowback processes are realized by one pipe column, the construction efficiency is high, the bearing pressure of the sleeve is small during flowback, the sleeve leakage is not caused, and the coverage and the unblocking range are large during unblocking construction.

The invention relates to the technical field of oil and gas field yield increase, and provides an integrated composite transformation liquid and a preparation method thereof. The problems that in the prior art, fracturing fluid and acid fluid cannot be used by one liquid, crosslinking in the acid fluid and hydrogen ion slow release for rock surface adsorption cannot be met at the same time, the resistance reducing function is achieved in the acid fluid, and the desorption function is not achieved when the fracturing fluid and the acid fluid are used for a reservoir mainly containing adsorption gas are solved. According to the main scheme, the preparation method comprises the following steps: preparing a resistance reducing agent main agent, a retarding and desorbing component and a cross-linking agent component. The main agent of the resistance reducing agent is prepared from polyacrylamide, poly (N-isopropylacrylamide) and other raw materials; the retarding and desorption component comprises a fluorocarbon surfactant, a titanate coupling agent and the like; the cross-linking agent component is composed of an organic zirconium cross-linking main agent, an organic acid salt cross-linking ligand and the like. The acidizing and fracturing fluid is used for acidizing and fracturing construction of oil and gas fields, can meet the technological requirements of acidizing and fracturing at the same time, and has the advantages of resistance reduction, low residue, high retardance and deep penetration in acid liquor.