32results about How to "Good water control effect" patented technology

The invention relates to a preparation method of a gas-well controlling agent, which comprises the following steps: proportionally and evenly mixing anionic polyacrylamide, cationic polymer and a cosolvent water solution at room temperature to obtain a polymer composite solution; and compounding the polymer composite solution, organic acid ester and carbonate in the proportion of 100:(0.05-0.5):(0.5-1) to obtain the gas-well water controlling agent. The method has the advantages of simple technique and easily controlled reaction conditions; and the gas-well water controlling agent can change the permeation characteristics and pore throat structure or partial water plugging of the gas-well reservoir to achieve the controlled gas-to-water ratio, has the characteristics of favorable shearing resistance, high thermal stability, high salt resistance, low friction resistance and the like, and is used for near-water or high-water-content low-permeability gas-pool water-control gas production or water-control fracture reconstruction.

The invention relates to a nanometer emulsion type water control fracturing fluid for a tight gas reservation well and a preparation method of the nanometer emulsion type water control fracturing fluid. The nanometer emulsion type water control fracturing fluid is prepared by 0.3-0.5 part of amino silicon oil nanometer emulsion and 100 parts of water by weight. The preparation method comprises the following steps of: adding an emulsifying agent and a low-molecule alcohol into the amino silicon oil; uniformly mixing the emulsifying agent, the low-molecule alcohol and the amino silicon oil; adding an organic acid and some water; continuously stirring, then adding an electrolyte and the rest water, stirring until the phase is homogeneous, and then obtaining amino silicon oil nanometer emulsion. The preparation process mentioned in the invention is simple, the process is easy to control, and the nanometer emulsion type water control fracturing fluid obtained has hydrophobicity, obvious water control effect, low viscosity, small grain size, low surface tension and stable performance, so the nanometer emulsion type water control fracturing fluid is suitable for water control fracturing improvement of a near-water or high-water content tight gas reservation well.

The invention discloses an automatic phase selection control valve. The automatic phase selection control valve comprises a base pipe (1); the outer portion of the base pipe (1) is sleeved with an end cover, an outer loop (3) and a screen pipe (4); a rotational flow restrictor (5) is arranged between the outer loop (3) and the base pipe (1); a lower end cover (7) of the rotational flow restrictor (5) is provided with a separation cavity (10) and a water storage cavity (12); a water nozzle (13) for being communicated with the water storage cavity (12) is arranged on the side wall of the separation cavity (10); and a base pipe liquid outlet (16) which is communicated with an oil nozzle (14) of the separation cavity (10) and a water outlet (15) of the water storage cavity (12) is formed in the base pipe (1). The automatic phase selection control valve has the beneficial effects that liquid can be differentiated to enable oil and water to be automatically separated; output of water is limited; the section is balanced, and the heel and toe effect is removed; the annular flow influence is removed, and the service life of an oil and gas well is prolonged; the recovery efficiency of a horizontal well control reservoir is improved; and the control valve is suitable for side / bottom water oil storage with the high heterogeneity.

The invention relates to a heavy oil displacement method using a wedged vicious slug. The method includes the steps of 1, dividing a nonhomogeneous reservoir into a plurality of layers according to water absorbing capacities, and acquiring permeability Ki of each reservoir; 2, designing three slugs, namely a pre-slug, a main wedged slug and a trailed slug, according to the permeabilities Ki and the physical properties in heavy oil and reservoirs; 3, alternately injecting the heavy oil reservoir with the pre-slug which is prepared with low-concentration B III-type poly-surfactant and which enters a high permeability layer to emulsify crude oil; 4, injecting the reservoirs with the main wedged slug for multiple rounds; and 5, injecting the trailed slug with low-concentration B III-type poly-surfactant or fresh water generally. In each round, the main wedged slug is divided into three small slugs; the small slugs in each round are combined by regulating the corresponding concentrations by the B III-type poly-surfactant according to formation permeability. According to the method, the nonhomogeneous heavy oil reservoirs are emulsified to reduce viscosity, the wedged equivalent vicious slug is used for equi-fluidity displacement, and swept volume is increased; accordingly, recovery efficiency of heavy oil can be further increased, investment can be reduced and operation can be simplified.

The invention provides a deep foundation pit confined water inrushing pressure reduction and water control structure. The deep foundation pit confined water inrushing pressure reduction and water control structure comprises a wellhole vertically formed under the ground. A well casing is arranged in the wellhole. Steel filter tubes are arranged on the upper middle portion and the lower portion of the well casing correspondingly. The bottom of the well casing is filled with filter material bags. A water filtration cushion block is arranged on the outer side of a bottom opening of the well casing. A submersible pump is arranged in the well casing. The submersible pump comprises a drain pipe. The drain pipe extends to a top opening of the well casing. According to the deep foundation pit confined water inrushing pressure reduction and water control structure, the pressure reduction well casing is provided with the upper steel filter tube and the lower filter tube, the combined drainage method of deep-layer drainage of the pressure reduction well casing and shallow-layer drainage of the horizontal filter tube is adopted, and high pressure and large-water-flow confined water inrushing ofa deep foundation pit can be stopped in short time. Compared with a traditional method, the deep foundation pit confined water inrushing pressure reduction and water control structure has the advantages that the water control effect is obvious, the water quality is good, no mud and sand are carried out, and no water inrushing hidden danger occurs again.

The invention discloses a phase-controlled valve. The phase-controlled valve comprises a base pipe (1), flow limiting valves (2) are mounted on the base pipe (1), a lower end cover (4) of each flow limiting valve (2) is provided with an annular flow passage (5) and a control chamber (7), the side wall of the control chamber (7) is provided with a sluice (9) through which the annular flow passage (5) and the control chamber (7) are communicated, and the base pipe (1) is provided with a base pipe liquid inlet (10) communicated with a nozzle (8) of the control chamber (7). The phase-controlled valve has the advantages that fluids can be distinguished, oil and water can be separated automatically, water output is limited to balance profiles and eliminate heel effects, annular flow influences are eliminated, productive life of an oil-gas well can be prolonged, recovery efficiency of a control reservoir of a horizontal well can be improved beneficially, and the phase-controlled valve is applicable to edge / bottom water reservoirs high in anisotropism.

The invention discloses a concrete floor pouring method for pressure reduction and water control of sudden rushing of confined groundwater of a deep foundation pit, relating to the technical field ofcivil and construction. The method comprises the following steps: arranging temporary cofferdams on the bottom surface of the foundation pit in the peripheries of the sudden rushing; symmetrically arranging at least two pressure reducing tube wells in the peripheries of the temporary cofferdams on the outer sides of the temporary cofferdams by taking corresponding sudden welling points as centers;and pumping underground water from the pressure reducing tube wells. Pressure reduction and water control of the sudden rushing of confined groundwater of the deep foundation pit are solved by meansof a pressure reducing water control system. When the sudden rushing of confined groundwater of the deep foundation pit happen, the sudden rushing of high pressure and large capacity confined groundwater can be terminated within a short period. The method overcomes the difficulty that wells are hard to form in the high pressure and large capacity confined groundwater and clean water cannot be discharged, and can be organized and implemented within a short time after sudden rushing, so that the water control effect is obvious.

The invention discloses an automatic hydrant, comprising a hydrant body and a sensor controlling the state of the hydrant body, wherein, the hydrant body comprises a water outlet pipe, a diaphragm and a diaphragm chamber, wherein, the water outlet pipe is used for being connected with water supply equipment; the diaphragm is contacted with the opening plugged on the water outlet pipe through the given pressure; and the diaphragm chamber is formed on the upper side of the diaphragm; the sensor side comprises a floater mechanism and a switching device controlled by the floater mechanism; the switching device comprises a first water control pipe connected with the diaphragm chamber and a second water control pipe connected with the water outlet pipe; the switching device comprises a valve plug and a pressure release opening, wherein, the valve plug is controlled by the floater mechanism and has the freedom degree of the up-and-down movement; and the pressure release opening is arranged on the switching device; the switching device is in a communicated state of the first water control pipe and the pressure release opening at the dead point position of the valve plug; the other dead point position is in a communicated state of the first water control pipe and the second water control pipe. The automatic hydrant has compact structure, low cost and good water control effect.

The invention discloses an urban hard riverway modular multi-system coupled ecological restoration system, which mainly comprises: a microbial attachment substrate module purification system, a submerged plant module purification system and a large-scale macrobenthic module purification system. The submerged plant module purification system is located at the downstream of the microbial attachment substrate module purification system, and the large-scale macrobenthic module purification system is located at the downstream of the submerged plant module purification system. The system provided by the invention can effectively treat urban hard riverway black odor and water deterioration, enhance the self-purification ability of riverway, and make the riverway water reach the surface water standards. The system provided by the invention is conducive to constructing a complex aquatic organism habitat, enhancing riverway animal and plant habitat diversity, and increasing the riverway ecosystem stability.

The invention discloses a quick-drying washing polyurethane foaming spongy cushion. The quick-drying washing polyurethane foaming spongy cushion is prepared from, by weight, 35-45 parts of microcrystalline cellulose, 140-180 parts of soybean oil, 160-200 parts of diethylene glycol, 0.13-0.27 part of potassium hydroxide, 90-110 parts of polyether polyol, 8-12 parts of foaming agent, 1.3-1.6 parts of foam stabilizer, 0.4-0.6 part of catalyst, 56-68 parts of toluene diisocynate, 4-6 parts of distilled water, 3-4 parts of basalt fibers, 14-17 parts of polyester fibers, 0.06-0.1 part of silane coupling agent, 3-4 parts of carbon black, 0.1-0.2 part of stearic acid and 0.1-0.3 part of dibutyltin dilaurate. The quick-drying washing polyurethane foaming spongy cushion is soft, comfortable and not prone to losing the shape, meets ergonomic buffering, is capable of eliminating and relieving fatigue, meets the increasing comfort-degree requirements of persons, and is excellent in air permeability, good in water control performance, excellent in quick-drying performance and worthy of popularization.

The invention relates to a method for wintering and frost protection of vetiver grass in the north. According to the technical scheme, the method includes the following steps that (1), after the outdoor temperature is reduced below zero, cropland is subjected to permeable irrigation once; (2), the vetiver grass is cut till the vetiver grass is 3-10 cm away from the ground, and the rhizomes of thevetiver grass are not damaged; (3), the upper portion and the periphery of the vetiver grass are covered with charcoal, then comprehensive earthing is carried out, and the charcoal is completely covered with earth; (4), on the tenth day after the tomb sweeping day, the earth is removed, the charcoal is left in the cropland, complete watering is carried out once, and germination of the vetiver grass is promoted. The method has the advantages that by means of the method, the wintering survival rate of the vetiver grass can be increased to 95% or above, the wintering survival rate of cultivated seedlings in control treatment is zero, compared with a traditional charcoal material, the vetiver grass is subjected to frost protection treatment in a charcoal mode by means of the method, the biomass is increased to 8 tons per mu from 3 tons per mu after wintering, and the wintering survival rate and the biomass are both remarkably increased.

The invention discloses a concrete floor pouring method for pressure reduction and water control of sudden rushing of confined groundwater of a deep foundation pit, relating to the technical field ofcivil and construction. The method comprises the following steps: arranging temporary cofferdams on the bottom surface of the foundation pit in the peripheries of the sudden rushing; symmetrically arranging at least two pressure reducing tube wells in the peripheries of the temporary cofferdams on the outer sides of the temporary cofferdams by taking corresponding sudden welling points as centers;and pumping underground water from the pressure reducing tube wells. Pressure reduction and water control of the sudden rushing of confined groundwater of the deep foundation pit are solved by meansof a pressure reducing water control system. When the sudden rushing of confined groundwater of the deep foundation pit happen, the sudden rushing of high pressure and large capacity confined groundwater can be terminated within a short period. The method overcomes the difficulty that wells are hard to form in the high pressure and large capacity confined groundwater and clean water cannot be discharged, and can be organized and implemented within a short time after sudden rushing, so that the water control effect is obvious.

The invention discloses a waterproof and drainage device for hydraulic engineering construction. The waterproof and drainage device for the hydraulic engineering construction is composed of a winch with a handle, a lifting lead screw, a temporary cofferdam dam, a supporting steel frame, a flow guiding sealing groove, a water inlet channel, a gate, a gate cavity channel and a water outlet channel;the gate in the gate cavity channel on the lower part of the temporary cofferdam dam is adopted to control the watertightness and the drainage of the hydraulic engineering construction, a water sourcein the temporary cofferdam dam can be effectively controlled to be discharged through the water inlet channel, and a flood outside the temporary cofferdam dam can be further effectively controlled from swarming into through the water outlet channel; the waterproof and drainage device for the hydraulic engineering construction has the advantages of being simple in structure, low in construction cost and good in water control effect; and the device is an ideal waterproof and drainage device for the hydraulic engineering construction.

The invention relates to a nanometer emulsion type water control fracturing fluid for a tight gas reservation well and a preparation method of the nanometer emulsion type water control fracturing fluid. The nanometer emulsion type water control fracturing fluid is prepared by 0.3-0.5 part of amino silicon oil nanometer emulsion and 100 parts of water by weight. The preparation method comprises the following steps of: adding an emulsifying agent and a low-molecule alcohol into the amino silicon oil; uniformly mixing the emulsifying agent, the low-molecule alcohol and the amino silicon oil; adding an organic acid and some water; continuously stirring, then adding an electrolyte and the rest water, stirring until the phase is homogeneous, and then obtaining amino silicon oil nanometer emulsion. The preparation process mentioned in the invention is simple, the process is easy to control, and the nanometer emulsion type water control fracturing fluid obtained has hydrophobicity, obvious water control effect, low viscosity, small grain size, low surface tension and stable performance, so the nanometer emulsion type water control fracturing fluid is suitable for water control fracturing improvement of a near-water or high-water content tight gas reservation well.

The invention discloses an automatic phase selection control valve. The automatic phase selection control valve comprises a base pipe (1); the outer portion of the base pipe (1) is sleeved with an end cover, an outer loop (3) and a screen pipe (4); a rotational flow restrictor (5) is arranged between the outer loop (3) and the base pipe (1); a lower end cover (7) of the rotational flow restrictor (5) is provided with a separation cavity (10) and a water storage cavity (12); a water nozzle (13) for being communicated with the water storage cavity (12) is arranged on the side wall of the separation cavity (10); and a base pipe liquid outlet (16) which is communicated with an oil nozzle (14) of the separation cavity (10) and a water outlet (15) of the water storage cavity (12) is formed in the base pipe (1). The automatic phase selection control valve has the beneficial effects that liquid can be differentiated to enable oil and water to be automatically separated; output of water is limited; the section is balanced, and the heel and toe effect is removed; the annular flow influence is removed, and the service life of an oil and gas well is prolonged; the recovery efficiency of a horizontal well control reservoir is improved; and the control valve is suitable for side / bottom water oil storage with the high heterogeneity.

The invention discloses a well bottom multi-stage split flow control water valve, which comprises a valve cover (1) and a valve body (2), and the valve body (2) is provided with two liquid inlets (3) and three liquid outlets (8,11,12), and offer main flow channel (4), branch flow channel (5) and split flow channel (6,7,9,10) on the surface. The invention does not contain moving parts, and through the design of pre-divided flow channels and multi-stage divided flow channels, the difference in the characteristics of different fluids is used to realize the flow restriction of specific fluids. Its beneficial effect is: as a protective development device for oil and gas reservoirs, it can effectively increase the diversion effect, increase the pressure drop of water flow, and realize oil increase control in solving the heterogeneity problems existing in edge / bottom water reservoirs and horizontal wells. Water plays a huge advantage and potential in strengthening oil and gas reservoir management and protective development.

The invention relates to a high-level liquid control device, which is characterized in that the valve body is made of plastic, the lower end is a water inlet of an internal thread, the outer end is a hexagonal screw head, the side of the lower end has an oblate hole with the same width as the valve body, and the upper and lower ends It is a semicircle with edges around it, and there is a groove along the surface. There are symmetrically distributed screw holes corresponding to the blind plate on the inner side of the groove. There is a 60° positive tapered sealing port on the inner upper side. Line and the center line of the valve body are on the same straight line, there is a flat protrusion with a hole in the middle of the upper end of the oblate hole, the outer arm of the oblate hole has a round boss, and there is a threaded protrusion in the middle The cylindrical countersunk through hole has a blind hole on the inner wall of the opposite side. The beneficial effect of the present invention is that the present invention is widely used, has a good water control effect, can save a lot of manpower and material resources, has a long service life, and is not easily damaged. Maintenance is simple.

The invention relates to a flow control device used in the field of petroleum production. The flow control device comprises a first valve body which is provided with a fluid inlet, a second valve bodyconnected to the first valve body and provided with a plurality of fluid outlets, and a floating disk arranged between the first valve body and the second valve body, wherein a fluid passage communicating the fluid inlet with the fluid outlets is formed between the first valve body and the second valve body; and the floating disk is configured to float in the fluid passage so as to change the flow of fluid in the fluid passage. The flow control device can automatically adjust the size of the fluid passage according to different fluid properties, and has the characteristics of intelligent water control and oil increment, thereby effectively solving the problem of high water cut in oil wells and improving the recovery efficiency in oil reservoirs.

The invention discloses a pretreatment method for carbon stable isotope detection of a plant sample. The pretreatment method comprises the following steps: mixing perlite and quartz sand according to the volume proportion of 1:1-9, air-drying, adding nutrient solution and soaking, and then draining the excessive moisture, and obtaining a perlite and quartz sand matrix; planting plant seedlings to be detected; performing the transplanting seedling cultivation and the water stress cultivation; taking healthy and whole leaves of the plants, washing and removing the excessive moisture on the surface, sterilizing for 15 minutes in 105 DEG C, and then drying in the constant temperature of 65 DEG C until the weight is constant, obtaining the dried leaves; and taking the dried leaves, grinding to be fine powder, sieving by 100 meshes of a sieve, and obtaining a sample for the carbon stable isotope detection. The method is suitable for the long-time water stress treatment of the perennial plant, the test uniformity is better, and the impact factor in the test is single relatively. The test interference factor is easily eliminated, the controllability is better, the more ideal water controlling effect can be realized, and the diction data and result are more accurate and reliable.

The invention provides a blood recovery bottle collection and water control device, and belongs to the technical field of medical auxiliary instruments. The device comprises a support frame; a water control groove is fixedly arranged on the support frame, and is inclined to the horizontal plane by 5-10 degrees; multiple water control columns are arranged in the water control groove, and are perpendicular to the horizontal plane by 90 degrees; embedding grooves are formed in the middle positions of the water control columns; and ultraviolet sterilization lamp tubes are embedded in the embedding grooves. The device is simple in structure and high in practicability, and solves the technical problems of single function, poor water control effect and incapability of collecting drained water in a centralized manner in a blood recovery bottle collection and water control device in the prior art.

The invention discloses an antibacterial medical non-woven fabric and a preparation process thereof, and relates to the technical field of non-woven fabrics. The preparation process comprises the following steps that S1, a non-woven fabric is prepared by adopting a preparation system, and opening, carding, lapping and spunlace are sequentially performed on composite raw material fibers to obtain the non-woven fabric; S2, the non-woven fabric prepared in the step S1 is dried, the drying temperature is controlled to be 95-120 DEG C, and after drying treatment, the moisture content of the non-woven fabric is 20-30%; S3, the non-woven fabric prepared in the step S2 is washed with water for three times, and the non-woven fabric is neutralized with an acetic acid solution with the concentration of 3% to enable a pH value of the non-woven fabric to be 5.0-8.0; S4, the non-woven fabric obtained in the S3 is dried, the drying temperature is controlled to be 95-120 DEG C, and the water content is controlled to be 8-10%; and S5, the non-woven fabric obtained in the step S4 is cooled and rolled. According to the antibacterial medical non-woven fabric and the preparation process thereof, a special antibacterial process and a fiber material are adopted, so that the non-woven fabric has a certain antibacterial effect and is more suitable for being used in the medical field.

The invention provides nano-emulsion for fracturing water control and a preparation method of the nano-emulsion. In a fracturing process of a tight gas well, the nano-emulsion for fracturing water control is injected into a tight gas reservoir along with fracturing fluid; the nano-emulsion for fracturing water control has hydrophobicity and stable adsorbability, after entering a stratum, the nano-emulsion for fracturing water control is adsorbed to surfaces of rock pores, and can resist water washing, water phase permeability can be reduced greatly, and the reduction amplitude reaches 70% or above; influence to gas phase permeability is quite low, the nano-emulsion has the characteristic of changing phase permeability selectively, and a water control effect is obvious; viscosity is low, surface tension is also low, the nano-emulsion is injected easily, and thus, the nano-emulsion is particularly suitable for the tight gas reservoir; and furthermore, the nano-emulsion is compatible to reservoir fluid well, and is good in shear stability, thermal stability and salt stability. Under the condition that influence to the gas phase permeability is quite low, the purpose of controlling water is achieved.

The invention provides a shifting valve, comprising a valve seat, a precise ceramic control valve, a locking cover and a hand group; wherein, the valve seat is internally provided with a receiving trough. The whole circumference of the receiving trough is provided with the locking section of a thread. A water inlet passage is arranged below the receiving trough and a water outlet passage is arranged at one side of the external side of the receiving trough. The precise ceramic control valve is controlled internally by precise ceramic sheets. An internal locking section is arranged above the precise ceramic control valve; a water inlet hole is arranged below the precise ceramic control valve and a water outlet hole is arranged at the side edge of the precise ceramic control valve. A control rod extends above the precise ceramic control valve and controls the actions of the ceramic sheet group. A locking cover is locked and covered outside the receiving trough. The control rod extends out of a prearranged perforation. The handle group is combined on the control rod. With the structures, the shifting valve which has better assembly structure, longer service life and is not easy to generate water leakage phenomenon is formed.

The invention discloses a rotary valve core structure which is successively composed of an upper valve core, an inner valve core sleeved in the upper valve core and a lower valve core sleeved and mounted to the inner valve core partially from top to bottom. An upper clamping strip mounted matched with a hand wheel or a handle to drive the upper valve core to rotate to be protruded is arranged on the outer side of the upper valve core, the upper valve core along the direction of a center axle is provided with an upper valve core cavity penetrating the whole upper valve core, and a slot is sunken in the upper valve core cavity; the inner valve core is of a columnar structure and a middle clamping strip mounted to the slot in a fit manner is formed on the lower part, the inner valve core is provided with an inner valve core cavity closed at the single side from the upward direction of the bottom, and the inner valve core penetrates the upper valve core cavity and protrudes out of the topof the upper valve core. The lower valve core comprises an upper valve rod inserted into the inner valve core cavity, a lower valve rod connected and mounted to the upper valve rod, a valve rod coversleeved to the periphery of the upper valve rod and mounted and joined to the middle clamping strip and a seal ring sleeved to the connecting position of the upper valve rod and the lower valve rod. The rotary valve core structure is small in occupied space, can move all around, and is good in water control effect, comfortable to use and low in noise.

The invention especially relates to a method for producing calcium ferrite applied to production of polyaluminum chloride by using residues in a pickling bath, belonging to the field of production methods for water purifying agents. The method comprises the following steps: adding a desiccant into an iron-containing waste acid solution; then adding an auxiliary catalyst and carrying out uniform stirring; then carrying out calcining at a constant temperature of 600-900 DEG C in an air atmosphere for 1 to 24 h; and successively carrying out cooling to room temperature, crushing and sieving so asto obtain calcium ferrite. In polyaluminum chloride synthesized from calcium ferrite prepared in the invention, the mass percentage of iron is 3.5% or more; and the synthesized polyaluminum chloridehas greater relative molecular weight than the relative molecular weight of commercially available polyaluminum chloride, and is improved in purification effect. Polyaluminum chloride synthesized fromcalcium ferrite prepared in the invention has obviously better coagulation effect compared with current commercially-available polyaluminum chloride.

The invention discloses a test tube drying device for food detection, and relates to the technical field of food safety, the test tube drying device comprises a workbench, a drying unit and a supporting unit; a supporting unit is installed in the middle of the upper end of the workbench. Each drying unit comprises an exhaust pipe, an air inlet pipe, a fastening ring, a filter screen, a metal rod, a heating wire and an air inlet fan, three circular holes in a linear array are formed in the front side of the upper end of the workbench, the exhaust pipes are arranged on the inner walls of the circular holes, the lower ends of the three exhaust pipes are connected with one side of a ventilation pipe, and the air inlet pipe is arranged at the front end of the ventilation pipe; a fastening ring is arranged on the outer side of the front end of the air inlet pipe, a filter screen is arranged on the inner wall of the fastening ring, three metal rods distributed in an array mode are arranged in the middle of the inner wall of the air inlet pipe, the water control effect of the whole structure on a test tube is good, residual water stains can be reduced, the drying time can be shortened, the fixing structure of the test tube is stable, and the test tube can be dried conveniently. And deviation is not easy to generate in the drying process.

The invention discloses a method for preventing and controlling water by using freezing pipes in an annular water intercepting tunnel. The method comprises the following steps of: 1, measuring and paying off: determining the layout positions of the annular water intercepting tunnel required to be dug and a plurality of ear caves according to the layout positions of a plurality of embedded freezing pipes and the structural size of a freezing ring in a freeze sinking process; 2, digging the annular water intercepting tunnel; 3, constructing an annular water blocking body, namely respectively digging the ear caves in the dug annular water intercepting tunnel from front to back, performing water preventing and controlling treatment after digging, and thus forming the annular water blocking body in the construction area; and 4, backfilling the annular water intercepting tunnel, namely backfilling the dug annular water intercepting tunnel by adopting concrete. The method is simple in steps, convenient to construct and low in construction cost, has a good water preventing and controlling effect, and can effectively solve the actual problems of high construction cost, high construction difficulty, poor water preventing and controlling effect and the like in the conventional freezing pipe water preventing and controlling method.