11 results about "Scale deposition" patented technology

The invention discloses a low-molecular scale-inhibiting thickening agent for deep coal rock gas reservoir fracturing and a preparation method of the thickening agent. The thickening agent comprises 25-40 parts of a hydrophilic monomer; 3-6 parts of a scale inhibition monomer; 3-5 parts of a functional monomer; 50 to 55 parts of deionized water; 0.5 to 0.8 part of an emulsifier; 0.15 part to 0.2 part of an initiator; 1.5 to 3 parts of hydrophobic monomer; and a proper amount of a pH regulator. According to the prepared scale inhibitor, the sand-carrying performance of fracturing fluid is met, meanwhile, groups with the scale inhibition function are innovatively introduced, during gel breaking, macromolecular chains are broken to release the scale inhibition groups, the scale inhibition groups are complexed with calcium and barium ions in formation water, scale deposition is inhibited, the effect and safety of fracturing construction can be further improved, and powerful guarantee is provided for efficient development of oil and gas fields.

The invention provides an under-cloud / in-cloud removal inversion method based on daily scale nitrate wet sedimentation, which belongs to the field of remote sensing atmospheric environment application science, and is characterized in that a cloud pollutant concentration parameter before a rainfall event is calculated based on satellite data in combination with a backward trajectory model so as to quantify a remote pollution transport effect; a random forest machine learning model is constructed based on multi-source data of satellite observation, ground observation and the like, and daily scale settlement estimation is performed by integrating meteorological factors, pollutant concentration parameters, cloud attribute parameters, social economic factors, terrain factors and the like; a cross validation optimization model is adopted, and the space generalization ability is improved through deviation correction; and analyzing the contribution of each factor, and outputting daily scale wet settlement flux gridding data. According to the under-cloud / in-cloud removal inversion method based on daily scale nitrate wet sedimentation, daily resolution wet sedimentation estimation is achieved for the first time, the short-term sedimentation dynamic state of a summer heavy rainfall event is accurately captured, and the contribution of the in-cloud removal effect to a clean area is quantified.

In a method of removing scale deposits from a used oilfield tube having first and second threaded ends, a coupling collar is unscrewed one or more rotations from a first threaded end about a longitudinal axis of the oilfield tube without detaching the coupling collar from the first threaded end. A spray of water is discharged through a spray tip of a lance. The spray tip is fed along the longitudinal axis from the collar to the second threaded end using a lance feeder, wherein the spray tip travels through a bore of the collar and the interior of the oilfield tube. Scale deposits are removed from the bore of the collar and the interior of the oilfield tube using the spray of water during the feeding of the lance.

The invention relates to the technical field of intelligent closestools, and provides a waterway control system capable of reducing incrustation scale, the waterway control system comprises a water source, a heating device and a flushing waterway which communicate with one another through pipelines, when the flushing waterway uses hot water, water flow of the water source is heated by the heating device and then supplied to the flushing waterway; and after the heating device stops supplying hot water to the flushing water way, the descaling function is executed, and the water source is controlled to at least supply water flow with the temperature lower than a preset threshold value to the flushing water way and / or the heating device so as to flush out at least part of residual hot water in the flushing water way and / or the heating device. On the basis, incrustation deposition can be reduced, incrustation blockage can be improved, the service life of the product is prolonged, and user experience is improved.

The invention relates to the technical field of oilfield injection water treatment, in particular to a scale settling and sewage filtering device, which is used for solving the problems of different problem solving objects, unknown filtering strength and low pertinence caused by the fact that the reason for generating impurities in oilfield injection water is not analyzed clearly in the prior art. An inlet flange and an outlet flange are connected to the shell, the inlet flange is connected to a water supply pipe, the outlet flange is connected to a water injection pump, and the inner diameter of the inlet flange is smaller than that of the shell, so that the flow speed of incoming water is reduced after the incoming water enters the shell through the inlet flange, and scale is deposited; the cross sectional area of the shell of the device is three times that of the water inlet pipe, so that dirt in water can be deposited, particles in the water are greatly reduced, impact on parts such as a valve seat, a valve plate and a plunger in the water injection pump is reduced, the maintenance frequency of the water injection pump is reduced, and the water injection efficiency is improved.

The utility model relates to the technical field of desulfurization process, in particular to an anti-blocking descaling device for a desulfurization process water system, which not only can be used for cleaning scales on the inner walls of a straight pipe and a bent pipe and widening the application range of the device, but also can be used for conveniently detecting the scale deposition condition and the descaling effect in a pipeline and is convenient for workers to operate. Comprising a fixing mechanism; the device further comprises a cleaning mechanism, a water filling mechanism, a sealing mechanism and a scanner, the cleaning mechanism is installed on the fixing mechanism and cleans the interior of the pipeline, the water filling mechanism is installed on the cleaning mechanism and pushes the cleaning mechanism to move, and the sealing mechanism is installed on the cleaning mechanism and enhances the sealing effect of the device. And the scanner is mounted on the cleaning mechanism and scans and detects the internal condition of the pipeline.

The invention relates to the technical field of underground pipeline repair, and discloses a pipeline non-excavation repair method and device, the pipeline non-excavation repair device comprises a bearing mechanism which comprises a shell and a UV lamp set fixedly mounted on the outer side of the shell; and the self-adaptive mechanism comprises a supporting plate, a damping spring annularly and fixedly mounted on one side of the supporting plate, and a limiting rod fixedly mounted on the outer side of the supporting plate. The walking assembly adopts the linkage design of universal guide wheels and transverse guide rods, lateral force is counteracted in real time through mechanical self-balance, a damping spring and a reset spring of the self-adaptive mechanism form a dynamic buffer system, vibration is absorbed, posture deviation is automatically corrected, and a rigid constraint mechanism of a limiting rod and a limiting movable plate is achieved; and meanwhile, a water spraying pipe head of the cleaning assembly and the scraping assembly act synergistically, scale deposition causing uneven stress is removed in advance, the path offset of the equipment within the repair distance is effectively reduced, and the problem that lining materials are poor in attachment due to uneven stress is thoroughly solved.

The present invention provides a method for inverting cloud / in-cloud clearance based on daily-scale nitrate wet deposition, which belongs to the field of remote sensing atmospheric environment applications. Based on satellite data combined with a backward trajectory model, pollutant concentration parameters in the cloud before a precipitation event are calculated to quantify the long-range pollution transport effect; a random forest machine learning model is constructed based on multi-source data such as satellite observations and ground observations, integrating meteorological factors, pollutant concentration parameters, cloud attribute parameters, socioeconomic factors, and topographic factors to estimate daily-scale deposition; a cross-validation optimization model is used and bias correction is used to improve spatial generalization ability; the contribution of each factor is analyzed, and daily-scale wet deposition flux gridded data is output. The present invention adopts the above-mentioned inverting method for cloud / in-cloud clearance based on daily-scale nitrate wet deposition, and for the first time achieves daily-resolution wet deposition estimation, accurately captures the short-term deposition dynamics of heavy precipitation events in summer, and quantifies the contribution of cloud clearance effects to clean areas.

Method of monitoring produced water at each perforation or entry point by real time ion sensor deployed downhole to measure the content of water soluble ions. Methods of determining and differentiating nature of water breakthrough in oil production; such as between cycled injection water through a void space conduit, matrix swept injection water and formation water, especially as relates to offshore oil production. Real time ion sensors are deployed and when compared with known standards are used to monitor and remediate water breakthrough, prevent scale deposition, and the like.

A method for inhibiting scale deposition in a geothermal system, the method includes treating a water stream of the geothermal system with a scale inhibitor composition, wherein the scale inhibitor composition comprises a compound that includes a peptide bond. The compound that includes the peptide bond may be polypeptide, such as polyaspartic acid. The scale inhibitor composition may include a ligand or dispersant polymer.

The present application provides a kind of bionic antifouling coating for complex environment.The bionic antifouling coating has at least one of a conical needle array surface, a rib band array surface and a conical hole array surface.The present application is inspired by the ability of cactus conical structure to direct liquid collection, the high-low rib structure of the bottle grass to quickly transport liquid, and the conical hole structure of duck bill to direct liquid collection.Combining the antisticking properties of the pitcher plant lubricated surface, a bionic antifouling coating is prepared and used for long-term antifouling in oil extraction and oil transportation.In a flowing oil-water environment, the long-term stable maintenance of the isolation layer is achieved, the purpose of inhibiting scale deposition and adhesion is achieved, and the long-term dynamic antifouling function in the oil-water environment can be realized.