88results about How to "Prevent upwards" patented technology

The invention discloses a production-increasing method by water-plugging and fracture, comprising the following steps: mixing 5 to 7 proportions of crack shielding agents with 100 proportions of clean water; injecting a mixture a into pressed cracks of a well layer under the temperature of 0 to 45 DEG C; shielding an aperture in a storage layer; mixing 5 to 10 proportions of bottom water oil reservoir plugging agent with 100 proportions of low-viscosity fracturing fluid; injecting the mixture generated in step c into cracks pressed in oil layer or gas layer under the temperature of 0 to 45 DEG C; plugging lower water layer after deposition of the mixture; carrying out sand-adding and fracturing operation on the oil layer or the gas layer at the upper part of the storage layer; closing a well and waiting for condensation then fishing the construction. In the method, the bottom water oil reservoir type or the bottom water gas reservoir type gas well bottom is plugged, the jumping-up of bottom water is prevented, simultaneously the crack height is controlled effectively, the extending-down of the crack is prevented, therefore, the aims of plugging the water layer is achieved and the single-well output of an oil well or a gas well is improved.

The invention relates to a novel laser welding piston with a forged steel structure. The piston comprises a forged piston ring body and a piston body, wherein the piston ring body and the piston body are welded by laser; a closed cooling oil chamber is formed between the piston ring body and the piston body and is communicated with the external through an oil inlet hole and an oil outlet hole; the lower part of the piston ring body is provided with an oil ring groove; the piston body corresponding to the position of the oil ring groove is provided with an annular groove; a girdle band is arranged between the oil ring groove and the annular groove; the girdle band is provided with a plurality of oil return holes communicating the oil ring groove and the annular groove; or the lower side of the oil ring groove is provided with a plurality of level oil return blind holes. The piston reduces weight of the piston, and increases flexibility of the piston body; and the oil return holes or the level oil return blind holes are favorable for back flow of machine oil of the oil ring groove, particularly the machine oil at the bottom of the oil ring groove so as to prevent the spilling of the machine oil caused by high pressure of the machine oil, and contribute to reducing machine oil consumption and harmful emissions of motors.

The invention discloses a method for transforming an oil field abandoned well into a geothermal well or a brine well. The method comprises the steps that in an oil field exploitation area, an oil field abandoned well with a brine layer below an oil extraction layer or an oil field abandoned well with the bottom boundary of a geothermal reservoir layer 200 m above an oil extraction layer position is selected, a drill pipe drill rig is lowered into an oil layer casing pipe to carry out pigging, and when pigging is smoothly achieved and after it is determined that no abnormal condition exits in the well, the artificial bottom of the well is poured to seal the lower portion oil extraction layer position; a pump chamber section is transformed, and a water drainage pipe is additionally arranged on an exploitation layer; perforation construction is carried out on a technical casing pipe located on the exploited geothermal reservoir layer or the brine layer; a water filtering pipe is lowered into the exploitation layer, and for the transformed geothermal well or the brine well, sand washing well washing is directly carried out, or a water filtering pipe with a sediment pipe on the lower portion is lowered; after well washing, exploitation testing, sampling analysis and acceptance check are carried out. By means of the method, the oil field abandoned well resources are recycled, and the double effects of energy conservation and environment protection, and economic benefits of recycling of the oil field abandoned well resources are achieved.

The invention discloses a brake pump piston ring of a car air compressor. The brake pump piston ring comprises a first ring and a second ring. A first piston ring groove and a second piston ring groove are formed in the piston from top to bottom in the circumferential direction, wherein the first piston ring groove and the second piston ring groove are embedded into the first ring and the second ring respectively. The first ring and the second ring are piston ring sets in the opposite twist directions. According to the brake pump piston ring of the car air compressor, the sealing effect is improved through the opposite twist directions of the piston ring, downward exhaust air of the air compressor is reduced, air pressure inside a crank case in the air compressor is controlled, engine oil is prevented from pumping upwards, and the oil pumping fault rate of the air compressor is reduced by 45 percent.

The invention discloses a concentric-tube double-tube steam injection wellhead device, which comprises a big cross fan and a double-tube cross fan, wherein a lateral path and a longitudinal path which are in cross arrangement are arranged in the big cross fan; the upper end of the longitudinal path is provided with a heat insulation tube hanger in a sealing mode; the heat insulation tube hanger is provided with a steam injection through hole; the double-tube cross fan is connected to the upper part of the big cross fan; the double-tube cross fan is provided with an inner steam injection path; an outer steam injection path is arranged on the periphery of the inner steam injection path; the lower end of the outer steam injection path extends radially and inwards to form a diffusion path; the diffusion path is positioned below the inner steam injection path; the lower end of the inner steam injection path is connected with an inner tube joint; the diffusion path is opposite to the steam injection through hole of the heat insulation tube hanger; and the oil tube joint extends into the steam injection through hole. The concentric-tube double-tube steam injection wellhead device has the advantages of simple structure, small volume, and reliable long-acting sealing and impact resistance in a long-term high-temperature and high-pressure condition in the steam injection process, and is convenient and flexible to operate.

The invention discloses supersaturated potassium chloride cement paste for well cementation. The cement paste is prepared from the following components: high sulfate-resistant G-grade cement, a salt-bearing fluid loss reducer, a preservative, a retarder, water, potassium chloride, a reinforced anti-migration additive, an expanding agent and a weighting agent. The supersaturated potassium chloride cement paste has the effects of stabilizing a well wall and improving the well wall strength; supersaturated potassium chloride assists a cement paste to resist the influence of mirabilite, gypsum, sodium, potassium, magnesium and other halite in an evaporite bed; the technology is reliable; the field construction is simple and convenient; the well cementation effect is good; the requirements on well cementation in the evaporite bed, a high-pressure deep well evaporite bed and a super-thick evaporite bed and other complex conditions can be met; the supersaturated potassium chloride cement paste has favorable application prospect particularly for the exploration and development of a potassium bittern water well.

The invention discloses an operation protective garment with a back-load type filter, relating to labour protection appliances. The operation protective garment comprises a protective garment main body made of non-woven fabric or nylon and a face mask, and further comprises a filtering main body arranged outside the protective garment main body, wherein the face mask is sewn to the protective garment main body; the filtering main body comprises a filtering box, a miniature fan, a storage battery and an air pipe; the storage battery and the miniature fan are fixed to the filtering box, an air inlet of the miniature fan is connected with the filtering box, an air outlet of the miniature fan is connected with one end of the air pipe, the other end of the air pipe extends into the protective garment main body, and the air pipe extends to the head part; and straps are arranged on the filtering box. The operation protective garment has strong purifying capacity for the air seriously polluted by dust, meanwhile is good in comfort, does not hinder the operation of operating personnel, and is simple in structure and low in price. The operation protective garment is particularly suitable for the operating personnel in the work space polluted by dust to use.

An oil and gas separating device comprises an oil and gas inlet, a soleplate of an oil returning hole, a shell, a built-in rotor vane, and a cover plate with an oil and gas outlet; the oil and gas separating device is characterized in that the shell is divided into two stages of upper and lower: a stage-one shell and a stage-two shell; the rotor vane is also divided into an upper stage and a lower stage; a screen is arranged between the two stages; and the screen is provided with a hole array and an oil returning hole. The internal surfaces of the stage-one shell and the stage-two shell are provided with tooth spaces respectively. One weather surface of the rotor vane is provided with a radial oil-guiding trough. The soleplate is also provided with a stepped zonal oil returning trough; and the oil returning holes are uniformly arranged in the zonal oil returning trough. As the staged centrifugal separation and screen separation and the tooth space structure which leads the oil to be agglomerated and bonded in the shell are adopted, the oil and gas separation effect is reinforced, and the oil and gas separating device is applicable to the oil and gas separation of valve chamber cover of the engine.

The invention discloses an energy-saving pressure-combining well head fracturing device, relating to the technical field of oil field development. The device comprises a hydraulically-driven flat valve, a fracturing injection head and a fracturing controller, both of which are orderly connected. The fracturing controller comprises double-gate-disc assemblies which are symmetrically arranged. A passage allowing an oil pipe suspension device to pass through is formed between the double-gate-disc assemblies which comprise semi-sealing housings. The insides of the semi-sealing housings are equipped with upper gate plates and lower gate plates below the upper gate plates. End parts of the upper gate plates are equipped with clamp tiles and first sealing parts below the clamp tiles. Second sealing parts are arranged on the lower gate plates. Under push of an oil cylinder assembly, the upper gate plates and the lower gate plates can be abutted against the oil pipe suspension device. A well head fracturing device and an under-pressure operation device are integrated in order to prevent floating. The device is reliable in sealing performance, great in load weight, compact in structure and convenient in operation and can observe on-off positions of gate plates in a real-time manner.

The invention discloses an invisible squatting pan, comprising a body, wherein, a front cover plate, a rear cover plate, a button, a hydraulic water inlet hole, a stool channel and a stool channel ventage are arranged in the body, the front cover plate and the rear cover plate which are arranged on the stool channel are moveably connected, and the front end of the front cover plate slides on sliding rails on both sides of the stool channel; a left rotating shaft and a right rotating shaft are arranged on the rear cover plate, and the left rotating shaft and (or)the right rotating shaft are (is)connected with a telescopic rod of a hydraulic cylinder by shaft connecting blocks; and the button is connected with a hydraulic valve, each connection opening on the hydraulic valve is connected with the water inlet of the hydraulic cylinder by a pipeline, and pressure water which is needed by the action generation of the hydraulic cylinder is led inside or discharged outside. The invisible squatting pan of the invention enlarges the activity space of a washroom, and can utilize the ground occupied by the squatting pan, thereby beautifying the environment, preventing odour from uprising, and enabling the effect of odour prevention to be favorable; and the invisible squatting pan has high degree of automation, can meet the requirements of users of multiple levels, and is applicable to high-end places.

The invention discloses a foam cutting machine. The foam cutting machine comprises a base, a workbench, a movable seat and an electric heating wire. The workbench is installed on the base. The movable seat can be installed on the workbench in the length direction of the workbench movably. The electric heating wire is located above the movable seat. The workbench is provided with a fixed baffle and a movable baffle in the length direction of the workbench. The fixed baffle is fixedly installed on the workbench. The movable baffle is driven by a ballscrew mechanism and can move relative to the fixed baffle. The two ends of a foam board can be clamped by the movable baffle and the fixed baffle. According to the foam cutting machine, foam board is clamped by the fixed baffle and the movable baffle on the workbench, the clamping effect is good, and the locating precision is high.

A compact and rapid tubing hanger comprises a mandrel type tubing hanger body and a cross body. The tubing hanger body is hung in a cavity of the cross body, a supporting ring is sleeved at the lower end of the mandrel type tubing hanger body, a threaded ring is in threaded connection with the tubing hanger body at the lower end of the supporting ring, the supporting ring is fixed axially by the threaded ring, a lock ring is sleeved on the mandrel type tubing hanger body, a sealing pack is in threaded connection with the tubing hanger body at the upper end of the lock ring, and grooves corresponding to shapes of the supporting ring and the lock ring are formed in the inner wall of the cavity of the cross body. According to the compact and rapid tubing hanger, bearing steps of the cavity of the cross body are not required to be designed, the full bore requirement of the wellhead and the cross is met; a novel retaining lock mode is used, a traditional top thread lock structure is abandoned, and getting down and lock can be completed through one step, so that the preset operation efficiency is greatly improved, and operation time is saved.

The invention discloses a vertical tar tube anti-jacking slip, which is mainly applied to an tar tube clamping tool for preventing an tar tube from moving upwards when the tar tube is jacked out with the pressure under a petroleum well. The vertical tar tube anti-jacking slip comprises a vertical slip seat (1), a slip body (2), a hydraulic cylinder (3), a supporting plate (4), a connecting rod piece (5), an upper pin shaft (6), a lower pin shaft (7) and a tension spring (8). The vertical tar tube anti-jacking slip is of an integral lifting structure and is fixedly connected with a snubbing unit, the operation on a power end is finished by one driller, the wedge-shaped slip body is provided with different-size slip teeth so as to effectively clamp the tar tube more and more tightly; a tube pillar is prevented from being jacked out by the formation pressure; additionally, the central force is large, and the force vertically clamping or loosening the tube pillar is large, the work is reliable, the personal safety and device safety can be ensured when the tube pillar is jacked up or down, and the smooth construction operation can be ensured.

A kind of rain grate not gas blowsy upward wmposed by grate body, gasked ,mounting asis,asle bed,tosrioonal spring. and magnetic absorption. on the back of rain grate set movable caminar mounting corresponding to the let-down hold in the rain grate. The mounting connects to the mounting axis, the axis pierces into the axle bed hole blend wit the roan grate, and trosional spring set in the mounting axis, magnetic absorption is set on the mounting, sealed gasket is set in the grate body. When water fall down, and the waiter's gravity force the sealed mounting open downward. When the water let-down finished, the mounting will seal automatically because of magnetic suction or spring elasticity, and prevent the foul air to go up in the tube effectively.

The invention discloses a novel technology for continuous pneumatic conveying of powder materials. Powder materials from a material bin A are conveyed to a material sending device after passing through a feeder, carrier gas output by a carrier gas source passes through a carrier gas supercharging device to be supercharged, passes through an airflow adjusting device and enters the sending device together with the powder materials, the carrier gas is used for conveying the powder materials to a material diverting device in the sending device, then the powder materials are conveyed to a material receiving bin B1 and a material receiving bin B2 respectively, and the carrier gas is discharged from the top of the material receiving bin B1 and top of the material receiving bin B2, enters the gas supercharging device to be supercharged and returns to a system again, wherein the material receiving B1 and the material receiving B2 are different. The novel technology has the advantages that the procedures are simple, automatic adjustment is simple, equipment investment is small, powder material products can be conveniently and stably conveyed, and in addition, the efficiency of the whole device can be improved. In the long run, the conveying cost of the powder materials can be reduced, and the benefits of an enterprise can be increased.

The invention discloses an inner embedding tooth and outer gear coupler type double-layer drill rod, which comprises a double-layer drill rod body, wherein the double-layer drill rod body comprises an outer pipe, an inner pipe, an upper joint, a lower joint, an upper sealing ring and a lower sealing ring; the inner pipe and the outer pipe are arranged in the same axial direction; a gap is formed between the inner pipe and the outer pipe; the upper joint is arranged at the upper end of the outer pipe; the lower joint is arranged at the lower end of the outer pipe; the upper joint and the lower joint are respectively and fixedly connected with the outer pipe to form a bearing structure of the drill rod; the upper sealing ring and the lower sealing ring are respectively positioned in the upper joint and the lower joint of the drill rod and are connected with the inner pipe to form an inner layer structure of the drill rod; inner embedding teeth are arranged inside the upper joint along the circumferential direction; outer embedding teeth are arranged outside the lower joint along the circumferential direction; the outer periphery of the upper joint and the outer periphery of the lower joint are provided with outer gears in the same structures; an inner gear sleeve sleeves the outside of the outer gear of the lower joint. The drill rod provided by the invention is used as an engineering drilling machine drill rod, is used for power transmission and airlifting reverse circulation fluid transmission, and has the advantages that the bearing is safe, the fast dismounting can be realized, and the double-layer sealing is reliable.

The invention provides a slip clamping type sucker rod blowout preventer which comprises a single-gate disc sucker rod blowout preventer and a slip locking assembly, wherein the single-gate disc sucker rod blowout preventer comprises a body and a single-gate disc assembly; and the slip locking assembly comprises slips, slip seats, slip locking shafts, slip lateral doors, slip locking screws, slip locking glands, locking bolts and limiting nuts. Slip cavities internally provided with the slips are symmetrically arranged on two sides of a main diameter of the body, the outer side of each slip cavity is sequentially provided with the clip lateral door and the slip locking gland, the slip locking shafts are arranged in working gaps remained on the outer sides of the slip lateral doors, the inner ends of the slip locking shafts are connected with the slips, the outer ends of the slip locking shafts are provided with limiting bosses; the inner ends of the slip locking screws are connected with the slip locking shafts, the outer edges of the slip locking screws are provided with the limiting nuts; and the plurality of locking bolts are arranged on the slip locking glands. The slip clamping type sucker rod blowout preventer has a reasonable structure and a remarkably-enhanced locking function on a sucker rod, and effectively prevents phenomena such as upward jumping, falling in a shaft bottom and leaking of the sucker rod from generating, thus safety and reliability of the blowout preventer are improved.

The invention relates to a washing type automatic unpacking system. The washing type automatic unpacking system comprises an integrated box. The integrated box comprises a feeding chute, a sieving cylinder box, a waste bag outlet and a discharging hopper. The front end of the sieving cylinder box is provided with the feeding chute. The rear end of the sieving cylinder box is provided with the waste bag outlet. A waste bag outlet automatic control opening and closing door is arranged at the position of the waste bag outlet. A rear drive sieving mechanism is arranged above the waste bag outlet.The bottom end of the sieving cylinder box is connected with the discharging hopper. The top end of the sieving cylinder box is provided with a dedusting opening. A bag breaking box is installed abovethe feeding chute. A rapid cutter changing mechanism and a bag breaking mechanism with a lip-shaped seal are arranged at the position where the feeding chute is located on the bag breaking box. An inlet sealing mechanism is arranged above a packaging bag inlet. The front face of the sieving cylinder box is provided with a quick-opening observation access door. The bag breaking box and the sievingcylinder box are internally provided with 360-degree automatic washing systems. Compared with the prior art, the washing type automatic unpacking system can achieve automatic unpacking and can be rapidly mounted, demounted and overhauled, and sealed type rapid washing is achieved.

The invention provides a well completing tester which comprises a first shell, a packing device, a drive device, a sliding rod, a testing device, a liquid inlet and a liquid outlet. A runner cavity is formed in the first shell. The packing device is arranged outside the first shell and used for separating the down-hole portion into an upper cavity and a lower cavity. The drive device and the sliding rod connected with the drive device are arranged in the runner cavity. The drive device drives the sliding rod to move in the axial direction. The testing device is arranged in the first shell and located below the sliding rod. The liquid inlet is formed in the lower portion of the first shell and communicated with the runner cavity and the lower cavity. The liquid outlet is formed in the portion, located above the packing device, of the first shell and communicated with the runner cavity and the upper cavity. The drive device controls the sliding rod to move in the axial direction so that the upper cavity and the lower cavity can be communicated or disconnected to open or close the well; then the testing device is utilized for recording the dynamic change process of the down-hole pressure, so that well completing testing is finished, the testing process is simple, and the tester is convenient to use. The invention further provides a well completing testing system.

The invention relates to a heat exchange system capable of realizing waste gas recovery. The heat exchange system comprises a fan, a heat exchanger, a rotary separator, a cold water tower and a gas-liquid mixing tower and further comprises a first-stage purification mechanism, a second-stage purification mechanism and a third-stage purification mechanism; the third-stage purification mechanism controls opening and closing of an air inlet of the heat exchanger through a first transmission assembly and controls switching work of a liquid outlet a of the rotary separator through a second transmission assembly; a purification liquid storage tank is arranged outside the gas-liquid mixing tower, and a purification liquid in the purification liquid storage tank is continuously introduced into the first-stage purification mechanism; an output mechanism is arranged in the second-stage purification mechanism, and the output mechanism quantitatively and intermittently conveys the purification liquid into the third-stage purification mechanism; a separation mechanism is arranged below the third-stage purification mechanism. The technical problem that the waste gas purification effect is low due to the fact that products are fewer and fewer due to the fact that reactants of the purification liquid are fewer and fewer after the purification liquid of the gas-liquid mixing tower is subjected to multiple times of reactions is solved.

The invention belongs to the technical field of oilfield cementing and particularly relates to a cleaning method of a well wall with synthetic drilling fluid before cementing and used cementing prepadfluid. By adopting the cleaning method provided by the invention, drilling fluid base fluid, an organic solvent, flushing fluid and spacer fluid are sequentially contacted with the well wall respectively, various components have synergetic effect, and the flushing effect of the drilling fluid to the well wall is improved. A result of the embodiment shows that by adopting the cleaning method provided by the technical scheme, the cleaning efficiency of the well wall can reach 90 percent or above.

The invention discloses a cylinder sleeve for a medium speed diesel engine. The cylinder sleeve comprises a cylinder sleeve body assembled in an engine body, wherein the bottom of the cylinder sleeve body is matched with the engine body, the top of the cylinder sleeve body is provided with a water passing sleeve with a flange, the outer wall of the bottom of the water passing sleeve is matched with the engine body, a water cavity is formed between the outer wall of the top of the cylinder sleeve body and the inner wall of the water passing sleeve, the flange of the water passing sleeve is provided with a plurality of water outlets communicated with the water cavity, and a cooling water cavity is formed by the outer wall of the middle of the cylinder sleeve body and the inner wall of the engine body and is communicated with the water cavity. The cylinder sleeve for the medium speed diesel engine is simple in structure and reasonable in design, and the cooling water cavity has a bigger water containing space, so that a better cooling effect is achieved.

The invention relates to the field of ladle baking, in particular to a baking method and a device of a ladle. The baking device comprises a baking cover and a burner nozzle; an exhaust pipe is arranged on the baking cover; a metal mesh is arranged at one end of the exhaust pipe and has a mesh size of 2-3 mm; the other end of the exhaust pipe is connected with a vacuum pump; and the exhaust pipe has a diameter of 40-50 mm. A counter weight is arranged at one end of the exhaust pipe. The exhaust pipe is wound on an electric winding device. Compared with the prior art, the baking method and the device of the ladle have the beneficial effects that 1), the bottom of the ladle is exhausted, so that the thermal circulation from top to bottom is formed in the ladle to eliminate baking dead angles in the ladle and keeping uniform baking effect in the ladle; 2), flames are prevented from upward channeling in the baking process to reduce the heat loss and improve the thermal efficiency; and 3), the temperature loss in the baking process is reduced to promote stable production.

A waste plastic bottle pulverizer material-pressing mechanism is arranged on a crushing chamber of a pulverizer and comprises a fixed plate. Two driving motors are disposed on the fixed plate. Output ends of the driving motors are connected with spiral stirring rods, lower ends of which pass through the fixed plate and extend into the crushing chamber above a cutter knife. When the cutter knife crushes and cuts, the spiral stirring rods rotate and run above the cutter knife so as to squeeze bottles inside the crushing chamber and prevent the bottles from scurrying upwards. Thus, crushing uniformity is further realized, and crushing efficiency is raised.

The invention relates to a method for integrally supporting a coil inner paper tube of a transformer, and belongs to the technical field of transformers, wherein the method is applicable to supporting operation in the integral sleeve installation process of coil inner paper tubes of the transformers, electric reactors and mutual inductors. According to the technical scheme, a tool is composed of a clamping part (1), a lead screw inserting-connecting part (2), a lead screw thread buckle (3) and a supporting shaft (4), a compression flange of the tool is fixedly connected with a cantilever of a coil lifting tool, the coil inner paper tube is clamped into two supporting pieces of the tool supporting shaft, after a coil is lifted, the supporting force of the tool is adjusted, the coil inner paper tube is supported in place, and the tool does not loose. The method for integrally supporting the coil inner paper tube of the transformer has the advantages that the coil inner paper tube is reliably supported and prevented from moving upwards, repeated operation work caused by the upward movement of the paper tube can be reduced effectively, product quality is ensured, working efficiency is improved, the tool is convenient to disassemble and can be adjusted at will in the length direction, and operation is easy, convenient and reliable.

The invention discloses a process for continuous pneumatic conveying of powder materials. The powder materials from silo A are transported to a material delivery device after passing through a feeder, and the carrier gas output from a carrier gas source is pressurized by a carrier gas booster device. , and then enter the sending device at the same time through the airflow adjustment device and the powder material. In the sending device, the carrier gas is used to transport the powder material to the material splitting device and then respectively sent to different receiving bins B1 and B2. The carrier gas is sent from the receiving bin The tops of B1 and B2 are discharged, enter the carrier gas pressurization equipment and return to the system after pressurization; the beneficial effects of the present invention are that the process is simple, the automatic adjustment is simple, the equipment investment is small, and it can not only continuously and stably transport powdery material products, Moreover, the efficiency of the whole device can be improved. In the long run, it can reduce the transportation cost of powder materials and increase the benefits of enterprises.

The invention discloses a method for transforming an oil field abandoned well into a geothermal well or a brine well. The method comprises the steps that in an oil field exploitation area, an oil field abandoned well with a brine layer below an oil extraction layer or an oil field abandoned well with the bottom boundary of a geothermal reservoir layer 200 m above an oil extraction layer position is selected, a drill pipe drill rig is lowered into an oil layer casing pipe to carry out pigging, and when pigging is smoothly achieved and after it is determined that no abnormal condition exits in the well, the artificial bottom of the well is poured to seal the lower portion oil extraction layer position; a pump chamber section is transformed, and a water drainage pipe is additionally arranged on an exploitation layer; perforation construction is carried out on a technical casing pipe located on the exploited geothermal reservoir layer or the brine layer; a water filtering pipe is lowered into the exploitation layer, and for the transformed geothermal well or the brine well, sand washing well washing is directly carried out, or a water filtering pipe with a sediment pipe on the lower portion is lowered; after well washing, exploitation testing, sampling analysis and acceptance check are carried out. By means of the method, the oil field abandoned well resources are recycled, and the double effects of energy conservation and environment protection, and economic benefits of recycling of the oil field abandoned well resources are achieved.

The invention provides a pressing opening-closing floor drain which can be opened when required, and is closed at ordinary times to prevent off-flavor gas in a downstair pipeline from channeling intoa room along the floor drain. The pressing opening-closing floor drain comprises a water inlet bowl, a filter screen plate, a partition plate and a pipe, wherein the filter screen plate is fixedly connected with the top end of the water inlet bowl. The pressing opening-closing floor drain is characterized in that the pipe penetrates the water inlet bowl upwards and is fixedly connected with the water inlet bowl, the top end of the pipe is closed, the pipe is provided with a water outlet communicated with the water inlet bowl and the inside of the pipe, the upper portion of the water inlet bowlis provided with a straight tubular structure, the bottom end of the straight tubular structure is lower than the top end of the water outlet, the filter screen plate is provided with a through hole,the partition plate slidably sleeves the pipe through a limit through hole in the middle of the partition plate and is provided with a pressing column penetrating the through hole upwards, the top end of the pressing column penetrates the filter screen plate and is exposed to the filter screen plate, a spring is arranged between the partition plate and the filter screen plate, and the partition plate moves upwards and approaches to the filter screen plate by the aid of elastic force of the spring.

The invention provides a hand-control opening-closing floor drain which can be opened and closed as required and can prevent off-flavor gas in a downstair pipeline from channeling into a room along the floor drain in a closed state. The floor drain comprises a water inlet bowl, a filter screen plate and a pipe, the filter screen plate is fixedly connected with the top end of the water inlet bowl,the pipe penetrates the water inlet bowl upwards and is fixedly connected with the water inlet bowl, the pipe is provided with a water outlet communicated with the water inlet bowl and the inside of the pipe, a sleeve is mounted at the top end of the pipe in a sleeving manner, the top end of the sleeve is closed, the filter screen plate is provided with a through hole corresponding to the sleeve,vertical guide mechanisms are matched each other and arranged on the inner wall of the sleeve and the outer wall of the pipe, a recess is formed in the inner wall of the sleeve, a positioning elasticprojection is arranged on the side wall of the pipe, the water outlet of the pipe is closed by the sleeve when the sleeve slides downwards to the top end of the pipe and is abutted to the pipe, the through hole of the filter screen plate is closed by the sleeve when the positioning elastic projection of the pipe is clamped into the recess of the sleeve, and the water outlet of the pipe is exposed.

The invention relates to a polyester-based label tape. The thickness of the polyester-based label tape is 0.100-0.150 mm. The preparation method of the polyester-based label tape comprises the steps of yarn pre-preparation, base cloth yarn treatment, weaving, shaping, immersion cleaning, drying, alcohol solvent coating, two-section baking and slitting. The specification of base cloth yarns is (60-120) D, the density of warp yarns is (70-150) pieces / cm, the density of weft yarns is (30-60) pieces / cm, and the base cloth yarns are treated by spraying 1-20wt% of a pre-preparation and 0.2-0.8 wt% of an antistatic agent mixed slurry and drying at 105-120 DEG C for 1-3 minutes; after the woven fabric is shaped, carrying out immersion cleaning by adopting a weak base mixed solution, and drying at 110-150 DEG C for 2-10 minutes; coating with a 10-30 wt% alcohol-based solvent compounded by multiple solvents, then carrying out gradient baking, carrying out first-stage baking at 80-120 DEG C for 5-10 min, raising the temperature to 180-200 DEG C, and carrying out second-stage baking for 1-3 min; and after drying and forming, slitting to obtain the terylene-based label tape. The polyester-based label tape alcohol solvent can be coated, and is anti-static, flame-retardant, washable and good in printing effect.