2716 results about "Water well" patented technology

This invention proposes a method for completing an interval of an open-hole injection wellbore penetrating a subterranean formation, said wellbore being communicating with the formation by way of an interface that comprises at least a filter cake invaded zone comprising bridging materials and other embedded solid materials, said method comprising the steps of injecting a clean-up fluid and contacting it with the filtercake for a period of time sufficient to loose some of the other solids embedded in the filter cake; removing the loosened solids by a high-rate displacement fluid comprising suspending additives; and then injecting a dissolving fluid comprising a diverter and an effective amount of a salt or acid capable of dissolving the bridging material.

A kind of mining oil gas method of the convection heating up oil-shale, involves the underground solid state energy and the mineral mining method improvement. The existing technical mining method efficiency is low, the cost is high, the scale is small, the big area implements and lacks the market competition ability with difficulty. This invention through in the ground arrangement group well, and selects the compression fracture method causes the group well to be interlinked, then the gap takes turns to choose the note hot-well and work-well, hot-well pours into 400 deg.C - 700 deg.C steam along the note oil-shale the ore level, heats up the ore level causes cheese root thermal decomposition to form the oil gas, and carries after the low temperature steam or the water along the production separates to the ground, finally forms the oil gas product. In the separation process may simultaneously the pre- hot water, and uses the water-injection well withdraws with work-well the convection way dries up oil-shale and the ore level around shale region afterheat, thus realized the goal of this invention is fast, big scale, low cost from oil-shale ore level mining oil gas.

The present invention provides an evaluation method and an evaluation device for water breakthrough risk of gas wells in gas reservoirs with aquifers, the method comprising the following steps: building evaluation factors that influence water breakthrough risk of gas wells in gas reservoirs with aquifers; acquiring weight vectors of the evaluation factors based on an analytic hierarchy process; building a fuzzy relationship matrix between the water breakthrough risk of gas wells in gas reservoirs with aquifers and its evaluation factors; and synthesizing the fuzzy relationship matrix and the weight vectors according to a weighted average fuzzy synthesis operator, to acquire a comprehensive evaluation result of water breakthrough risk of gas wells in gas reservoirs with aquifers. The present invention improves the accuracy of the evaluation result of water breakthrough risk of the gas wells, and is able to obtain an evaluation result that is more consistent with the case of actual water breakthrough of gas wells in gas reservoirs with aquifers.

One embodiment of the present invention is a system comprising one or more subsystems, which can be practiced alone or in combination, which together allow for monitoring of groundwater, rock, and casing for production flow and leakage of hydrocarbon fluids. A flow measurement subsystem measures flow of hydrocarbons in the horizontal casing string. A well mechanical integrity monitoring subsystem monitors the mechanical integrity of the natural gas production well, including the junctures of a completed well. An aquifer monitoring subsystem directly monitors water aquifer(s) underneath and surrounding a natural gas production well or pad, including monitoring wells or existing water wells. A communication subsystem is used to communicate measurements taken downhole to the surface. The present invention may be used to enhance the production from a gas bearing shale formation, mitigate liability associated with hydrocarbon migration, and monitor for a loss of mechanical integrity of a well.

A architectural engineering area technology controllable a well lamination construction, including: (1) falls water well use two section or more strainer designs, in the diving water-bearing stratum and the bearing pressure water-bearing stratum has the strainer separately; (2) in the well, between the diving water-bearing stratum and in bearing pressure water-bearing stratum's section of well tubes installs stops the water installment controllably; when (3) tenth well constructs, outside between well tube's wall and the opening wall, the diving water-bearing stratum and the bearing pressure water-bearing stratum's aquiclude place establishment stops the water section; when (4) precipitation construction, carries on the diving unwater precipitation first, when in has the dangerous depth which structure excavation to the confined water produces wells up suddenly, opens in the well to stop the water installment, the extraction confined water, and may continue to the diving water-bearing stratum to carry on the unwater precipitation; In the pump process, in the well stops the water installment to open repeatedly and to close, realizes to the precipitation level, the precipitation process, the precipitation degree control. This invention uses a well to solve the diving unwater and the confined water voltage dropping or the unwater question.

This invention relates a method for combined precipitation with pit phreatic water and aquifer layers including the following steps: applying one well structure to a precipitation well, closing a controllable water valve when evacuating the phreatic water, analyzing 3-D underground water seep to determine limit elements, pumped volume and influence radius, when the dig reaches to a water-isolation layer, the water in the aquifer layer is pumped to reduce water pressure to determine the dig depth, water-pump volume, orifice of wells, numbers, the influence radius of water power fall and sedimentation of surrounding ground using a method for computing limit elements determined based on 3-D underground water seepage and ground sedimentation based on plane diameters of the pit, dig depth, embedded depth of underground wall and structure condition of the aquifer layer.

The invention relates to a method of shallow embedment and concealed excavation based on the PBA method for construction on super large cross-section of tunnel, comprising the following steps: 1. to detect the geologic cavity over the wide span tunnel structure; 2. to arrange the ground dewatering well and the tunnel horizontal well; 3. to take the horizontal channels of vertical well as the front large pipe shed on the arch part of the main body and to inject for strengthening the terrain formation; 4. to carry out the supporting arch construction on the side span of small pilot tunnel and the supporting major arch construction on the main body; 5. to excavate the soil mass of lower cross section as the extended foundation and the central partition wall; 6. to remove the bottom central partition wall section by section, construct bottom underlayer and waterproof layer, pour the reinforced concrete; 7. to remove the central partition wall of the upper part section by section and temporary steel shotcrete in the small pilot tunnel, construct the waterproof layer and concrete of the side wall and the main arch. The method of shallow embedment and concealed excavation based on the PBA method for construction on super large cross-section of tunnel has the advantages of guaranteeing the safety, quality and time limit of the construction, saving cost and enhancing work efficiency.

The invention offers a method of exploiting seabed hydrate. It includes the following steps: using at least two well arrays to form a injecting exploiting well array; using horizontal or deflected section to connect with water injection well and gas production well at hydrate layer; transferring carried heat quantity to hydrate to make it decompose; exploiting the decomposed natural gas; separating gas and water; injecting the separated water to deep part geothermal water layer. The invention combines heating and decompression. The invention has the advantages of simple equipment, convenient operation, and environmental protection. It can apply in large scale exploiting seabed hydrate.

The invention discloses a low permeability oil field thermochemical cleanup additive and applications thereof in acidification and fracturing technologies of low permeability oil field oil and water wells. The thermochemical cleanup additive consists of an agent A and an agent B. The agent A consists of certain parts by weight of phosphoric acid, sodium nitrite, dodecyl benzene sulphonic acid, emulsifier, surfactant and water; the agent B consists of certain parts by weight of urea, ammonium chloride and water. The agent A and the agent B thermally react under certain conditions to produce a large amount of nitrogen, carbon dioxide and high-temperature-hot-water and a large amount of heat simultaneously; in addition, the nitrogen and the carbon dioxide with certain pressure can form a large amount of bubbles under the function of a highly efficient active foaming agent for residues to be drained out of the oil and water wells. The thermochemical cleanup agent does not burn or explode easily and is mainly applied to the cleanup technology of the acidification and fracturing techniques of the low permeability oil and water wells for solving the problems such as inadequate drainage strength, reducing pollutions of remaining operating fluid to reservoir stratums and effectively enhancing the acidification and fracturing effects.

The invention belongs to the technical field of polluted ground water remediation, and particularly relates to a method and a system by using micro-namo bubbles to perform reinforcement in-situ remediation on polluted ground water. The method comprises the steps of: arranging a water injection well at the upper reaches of a region with ground water polluted by pollutants, and feeding micro-nano bubble water containing nutrient salts; leading the micro-nano bubble water to flow to the polluted region with the ground water, so as to decompose the pollutants or continuously compensate electron acceptors or electron donors for microorganisms and facilitate degradation and removal of organic pollutants; at the same time, arranging a water pumping well to pump water at lower reaches of the polluted region, so as to form a subsurface flow field; and using a monitoring well to monitor and analyze parameters in real time during the process of removing the organic pollutants, and adjusting the generating time and the aeration intensity of the micro-nano bubbles. According to the invention, the micro-nano bubbles are good in oxygen supply effect, long in lasting time and wide in influencing range, the method and the system provided by the invention can make up the shortages of common in-situ remediation technologies such as natural degradation, bioventing and the like and are low in cost and high in energy-saving efficiency, thereby being applicable in remediation for a field with a limit area and a high pollution load.

The present invention is method of regulating oil field water injecting and oil producing system in very high water containing stage, and aims at solving the problems of too great ratio between oil producing well number and water injecting well number, too high water injecting pressure, and too low stratum pressure and flow pressure in very high water containing stage. The present invention adopts water injecting and oil producing mode with transverse linear water injecting well net, five point area well net, longitudinal linear water injecting well net, and determinant type water injecting well net. The present invention can raise oil output greatly.

A method for stimulating production of resources from a coal seam includes forming a drainage well bore in the coal bed that has a first end coupled to a ground surface and a second end in the coal seam. The method further includes inserting a liner into the well bore. The liner has a wall including a number of apertures and a second diameter that is smaller than the first diameter of the drainage well bore such that a gap is formed between the wall of the liner and the well bore. The method also includes collapsing the drainage well bore around the liner to relieve stress in the coal seam proximate to the liner.

The invention relates to a circulation well method for removing pollutants in underground water. The circulation well is arranged in a polluted place and is in a continuous plum-blossom-shaped, square or hexagonal layout according to soil property, pollution level and radius of influence on soil by equipment. The circulation well is characterized in that 1-N water wells of which the diameter is not smaller than 100 mm and the depth is greater than one meter are drilled, and treatment processes of aeration, air stripping, extraction and dosing are performed to treat the polluted water in the well, wherein the air stripping treatment process: the well water (i.e. underground water) is lifted to the top of the well and is then sprayed downwards through a spray head; in the aeration and extraction treatment processes: the in-well aeration and the air-emptied extraction increase the air-liquid mass transfer interface and enhance the air stripping effect, and the dissolved oxygen content in the underground water is increased in the in-well aeration process, so that the polluted water is placed in an aerobic environment; and in the dosing treatment process: according to different pollution levels and pollutants, oxidizer, a microbial preparation, ozone or / and flocculant are added at an air inlet A of a high-pressure air pump for aeration or in a special dosing pipe.

The system of subterranean wells includes a subsurface flow line 20 having at least a portion within or underlining one or more subterranean formations 12. One or more drainage wells 26, 28, 30, 32, and 34 each extend from the surface and intercept at least one of the subterranean formations at a respective interception location. A lower portion of each drainage well is in fluid communication with the subsurface flow line. A recovery well 42 extends from the surface and is also in fluid communication with the subsurface flow line, so that fluids entering the drainage well flow into the subsurface flow line and then into the recovery well.

Methods of placing off-shore wells on production comprising the steps of separating a gas from oil or oil and water produced by the well, introducing the gas into the seawater surrounding the well at a depth where the temperature and pressure of the seawater are such that solid gas hydrates are formed when the gas is mixed with the seawater, mixing the gas with the seawater whereby the gas is converted to solid gas hydrates and depositing the solid gas hydrates on the sea floor.

The invention relates to a deep profile control method for a fractured oil reservoir. By the method, the recovery ratio of crude oil can be increased. Four sections of plugs are provided for plugging different types of fluid-channeling channels, wherein in the first section of plug, a high-strength solidification system is used for plugging fracture; in the second section of plug, inorganic gel is used for plugging microfracture or large pores; in the third section of plug, a water drive flow direction changing agent and weak gel are used for further filling the fracture and the pores so as to displace residual oil in the pores; and in the fourth section of plug: a strong gel YQY plugging agent is used for plugging the fracture near the wellbore. By the method, the problem that the oil well is flooded by water caused by the fracture of the fractured oil reservoir water injection well can be effectively solved; the water absorption condition of a storage layer is changed; the utilization ratio of the injected water is increased; the swept volume is enlarged; and the oil displacement efficiency is improved finally.

A mud pump is provided with two cylinders for pumping mud in connection with water well drilling, and two sets of hydraulic oil cylinders with pistons connected to and driving the pistons of the mud pump by piston rod connecting plates. A flow divider located downstream from a hydraulic oil power supply pump applies hydraulic power evenly to two sets of mud pump driving cylinders, but the flow divider accommodates re-routing of hydraulic oil to one driving cylinder during a directional valve shift for the other driving cylinder. Rod position sensing switches coupled to an electro-hydraulic control system coordinates the action of the sets of pump driving cylinders and thereby of the mud pumping cylinders, to control and phase the mud driving pistons produce a steady mud pump output simulating the effect of constant velocity pistons.

A dynamic compaction soft foundation reinforcing method by combing layered dead weight and pre-pressing drain concretion includes: filling a water-isolation cofferdam; a water collecting well is arranged in the middle of the cofferdam; a sand layer of 0.5m to 0.8m is filled by hydraulically filled or manually filled on the original water-drained ground; a horizontal drain pipe is embedded in the sand layer to carry out first earth hydraulic filling; a drain pump is arranged in the water collecting well to continuously drain water; when the thickness of hydraulic filling reaches the designed elevation of the first layer, the hydraulic filling is stopped; when the surface of the hydraulic filling earth forms a hard shell layer with a thickness of 30m to 40m under the actions of vaporizing and dead weight drain, the hydraulic filling to a second layer and a third layer are carried out according to the steps; even a required hydraulic filling height is designed; finally hill-skill soil or mixed backfill soil and sandy soil are back filled on the layers; dynamic compaction is carried out after leveling. The invention has the technical economic indexes of fast speed, saving investment, small settlement after construction and high surface layer bearing capacity, etc., and has remarkable technical advantages on lower ground elevation and the projects of polder reclamation by hydraulically fill the soft soil like silt.

The invention is a method for implementing high-water content well same-well injection production by multi-cup uniform-flux underground oil-water separator, characterized in: using multi-cup uniform-flux underground oil-water separator to make the produced liquid from the extracted bed automatically deposit when underground flowing through the separator, after the oil and water are separated from each other, using two lifters to lift and reinject through the respective independent flow channels and the two lifter are respectively called extraction pump and injection pump, the produced liquid with low water content is lifted by the extraction pump through the flow channel of the extraction pump up to the ground and the produced liquid with higher water content is reinjected by the injection pump through the flow channel of the injection pump into the injection bed. And it can perfectly complete underground separation of oil and water, implement economic and effective extraction for high-water content wells and implement water injection for other oil beds in the same well site at the same time.

It relates to the after potential exploration of an oil filed, with the ability of analyzing the oil distribution, left resource quantity, and so on. It comprises the data inspection device, data preprocessing device, KH value separation device, oil well water absorption preprocessing device, water absorption section separation device, dynamic personnel analysis separation device, small layer weighting separation device, single sand separation result accumulation device, data base, water filling effect, strata HK, and weighting of the oil reserve weighting by the dynamic personnel, determining the strata output through the water absorption section, water content of the strata through well fluid section, with the whole process being computerized and accurate.

A system (10) for video inspection of a passage such as a bore hole (2) is provided. The system (10) includes a carrying case (1) having a deep housing (12) and a removable cover (14) with a spool (16) of coaxial cable (18) stored inside the carrying case (1). The coaxial cable (18) exits the carrying case (1) at an opening (13). A cable arm (20) attached to the carrying case (1) and supported by an adjustable leg (22) conveys the coaxial cable (18) to the passage. Attached to the end of the coaxial cable (18) is a camera assembly (24). Camera assembly (24) includes a single camera operable to capture an image in a first direction along a long axis and a second direction, ninety degrees offset from the first direction.

The invention relates to a multi-well water storage system, which comprises a water storage container with the upper part being provided with an opening and water collection wells, wherein the wall of the water storage container is of a waterproof structure; the water collection wells are arranged inside the water storage container, the water collection well is provided with a waterproof well cover, the wall of the well is of a water penetration structure, stuffing is filled between the water collection well and the water storage container, a water penetration surface layer is arranged above the stuffing, the stuffing comprises sand and water penetration storage carriers, the water penetration storage carrier is provided with a water storage space, the quantity of the water collection wells is multiple, the plurality of water collection wells are communicated with each other through communication pipes, and the upper bore of at least one water collection well extends out of the water penetration surface layer and is provided with a water proof cover. Rainy water or sewage collected by the multi-level water storage system is filtered by the water penetration surface layer and precipitated and filtered by sand to obtain pure water; and moreover, water is difficult to go bad and to stink being stored in the stuffing or the water collection wells; and at the same time, the water penetration storage carriers in the stuffing effectively increase the storage capacity, and the multiple water collection wells satisfy the demand of the a great amount of water.

The invention relates to a heat-gaining combined heat and power system, which belongs to the application field of the energy technology, and consists of a gas engine, a power generator, an absorption-type heat pump, a high-temperature smoke-water heat exchanger, a middle-temperature smoke-water heat exchanger, a low-temperature smoke-water heat exchanger, a water-water heat exchanger, a solution dehumidifying system, a ground heat exchanger, a superficial-layer underground water well or a sewage heat exchanger and accessories such as connection pipes and valves. The system can realize two work conditions of heat supply and coldness supply, and is provided with multiple pipeline switching forms under the work conditions of the heat supply and the coldness supply so as to adapt to the requirements of different situations; the system can ensure the adequate utilization of the heat of the gas engine, can adequately recycle the surplus heat of the exhausted smoke of the gas engine in winter, and can realize the extraction of the heat of the low-temperature heat source so as to improve the comprehensive efficiency of the system and to reduce the environmental pollution; and the system can discharge the heat of the low-temperate smoke and the heat of the cooling water into the low-temperature heat source to be stored in summer; and moreover combined with the solution dehumidification and the living hot water, the energy utilization efficiency of the system can be improved.

The invention discloses an automatic circulation separate zone periodical water injection method of a water injection well. More than two automatic circulation switchers are arranged in a water injection string and in a way of corresponding to each oil layer; in each automatic circulation switcher, a motor for opening or closing an eccentric water distribution valve is connected with a micro processor; the micro processors of the automatic circulation switchers are configured with opening and closing programs respectively; and the automatic circulation switchers automatically and alternately open and close according to a set time sequence to inject water into each oil layer circularly to realize periodical pulse water injection to underground oil layers. The method is simple in operation, reliable in operation and high in success rate, avoids manual control and a manual control factor, which causes errors easily, and improves water injection development effect.

A water cycling system with compressor motive force and with turbine electric power generation, includes: (a) a water piping subsystem that has a circuitous loop means for continuously or intermittently circulating water in a loop, the loop having an upward flowing side and a downward flowing side, the loop having a bottom level and a top level with a head differential of at least fifty feet between the bottom level and the top level; (b) an air compressor subsystem including at least one air compressor having a compressed air outlet with the air outlet being located below the top level in the upwardly flowing side of the loop; and, (c) at least one electric power generating water-driven turbine located within the loop. In some instances the subsystem of piping is part of a water well; in other instances, part of a geothermal well; in yet other instances a different system, such as an above-ground system, e.g. a water tower.

A deep section regulating technique for regulating the water absorbing section of water injection well features that its section regulating agent is prepared from the additive and oil-contained sludge which has high compatibility to stratum. Its advantage is high plugging effect to high penetration stratum.

The operation unit with pressure for oily water well in oil field consists of upper cross beam, traveling slips, elevating hydraulic cylinder, energy accumulator, annular blowout preventer, transverse regulator, single ram blowout preventer, fixed slips, middle cross beam, elevating nipple, spherical blowout preventer, three ram blowout preventer, longitudinal regulator, lower cross beam, load display, coupler detector, oil tank water preventing loop unit and remote control system. The comprehensive operation unit with pressure has reasonable structure, high sealing performance, high safety and reliability, low cost and labor strength, and may be used in various kinds of complicated operation.

The invention relates to a method for controlling a track of a well hole of a special horizontal well of an edge-top water reservoir. The method comprises the following steps: a fishhook-shaped well hole track is adopted in the drilling construction process of the horizontal well and a sidetrack horizontal well of the edge-top water reservoir; the well hole is drilled to mudstone of the lower part of the reservoir; well completion in the middle part of the mudstone realizes effective packing of the edge-top water of the upper part and ensures the safe drilling of the horizontal well section of the lower part. The method has main advantages that as a technical sleeve runs to a mudstone layer, the method can effectively prevent the edge-top water from invading an oil layer and can improve the well fixing quality of the technical sleeve in the middle well completion; and as the track of the well hole of the horizontal well is smooth, the normal running of the sleeve and a sieve tube is ensured.

An intelligent water draining system of urban roads is applied to road surfaces and a water well. The intelligent water draining system of the urban roads comprises a water draining well lid, a hydraulic device and a pressure sensor. The water draining well lid comprises a fixed well lid and a movable well lid. The fixed well lid is fixedly inset into the road surfaces, the hydraulic device is fixed on the side wall of the water well and is connected with the movable well lid, the hydraulic device is electrically connected with the pressure sensor, and the pressure sensor is arranged on the fixed well lid. According to the intelligent water draining system of the urban roads, the degree of opening of the water draining well lid can be controlled according to the depth of surface gathered water, and the purpose of draining water fast is achieved. The water flowing volume of a water well lid is controlled according to the road surface rain volume, rain water can be effectively drained to the water draining system to reduce the surface gathered water, and riding comfort and pedestrian safety in sunny days or days with small amount of rain can be guaranteed. The intelligent water draining system is arranged under the road surfaces, so that the intelligent water draining system is not damaged by people easily.