72 results about "Relief well" patented technology

A method for surveying a borehole is provided. The method includes providing a tool having a magnetic field measurement device disposed thereon and positioning the tool in a borehole. Magnetic interference vectors are determined at at least two positions in the borehole by comparing the measured magnetic fields at those positions with a known magnetic field of the earth. The magnetic interference vectors indicate a direction to a target subterranean structure. Various embodiments of the invention compare the directions to the target subterranean structure with a historical survey thereof, so as to determine a distance between the borehole and the subterranean structure and an azimuth of the borehole. The surveying methodology of this invention may advantageously improve borehole surveying data obtained, for example, in relief well and/or well twinning drilling applications.

The invention provides an electromagnetic system for detecting a distance between adjacent wells while drilling, which is capable of providing accurate guide measurement and calculation for the control of well tracks of wells with complex structures, such as a cross well, a U-shaped communicated well, a dual-horizontal well, an accident rescue well and the like. The electromagnetic system for detecting the distance between adjacent wells while drilling mainly comprises a magnetic pipe nipple, an electromagnetic measuring instrument and a method for calculating the distance between adjacent wells, wherein the magnetic pipe nipple is a hollow cylinder with API standard ports at the two ends consisting of a non-magnetic drill collar and a plurality of permanent magnets, and is used as a signal source for an electromagnetic guide system; the measuring instrument mainly comprises an underground searching tube and a ground system, and is mainly used for detecting a magnetic vector signal ofthe magnetic pipe nipple and for sending data to a computer through an RS-232 interface; and the computer processes and analyzes measured information by using the method for calculating the distance between adjacent wells so as to convert the measured information of a drill position into readable data for engineers. The electromagnetic system for detecting the distance between adjacent wells while drilling has a simple structure and convenient use, and provides an effective high and new technological measure for the detection and control of the distance between adjacent wells with complex structures.

The invention provides a system using solenoid groups to achieve the electromagnetic guiding distance measurement while drilling (MWD) and providing precise guiding measurement and calculation for the directional drilling control of dual horizontal wells, communicated wells, infill wells, relief wells and other complex wells. The system mainly comprises a nipple joint of the solenoid group, a converted MWD device, an adjacent well distance calculation system and surface equipment. By arranging two orthogonal solenoid groups as a magnetic signal emission source in a drilled well, the system of the invention can generate a rotating magnetic field just as that generated by the rotating magnetic nipple joint of an RMRS (rotating magnet ranging system), thus ensuring the measurement precision equivalent to that of the RMRS; meanwhile, by using the method for increasing the current intensity of the solenoid coil, the system of the invention can increase the intensity of the magnetic signal emission source and help extend the distance measurement range; and the invention has the advantages of high guiding accuracy, wide distance measurement range and simple structure, thus providing an effective hi-tech way for the detection and control while drilling the adjacent well distance.

The invention discloses an emergency treatment method for sudden gushing of a high confined water stratum foundation pit. The method is characterized by comprising the steps that the water gushing condition is proved, a steel casing is arranged on the water gushing point in a covering manner to serve as an energy-releasing relief well, a simple back pressure platform is arranged at the bottom of the steel casing, the height of the steel casing should be 1 m above the static water level, water gushing kinetic energy can be guided into the steel casing, then, the water head pressure is released, and the water level in the steel casing depends on the pressure difference to be balanced; and meanwhile, the top face of the casing is sealed, communication of internal gas pressure and external gas pressure of the casing is prevented, the backpressure backfilling sealing grouting condition is simulated, a WSS double-tube non-shrinkage two-fluid grouting technology is adopted for carrying out advancing type segmented grouting, and therefore the aims of rapidly controlling water gushing of the foundation pit and reducing the risks of the foundation pit are achieved. According to the method, the number of emergency treatment materials and machine tools is small, the source is convenient, a construction technology is simple, the workload is small, and the construction cost is low; the emergency treatment time is short, and the dangerous omen can be rapidly controlled; and the method is suitable for treating water gushing of the foundation pit in various foundation pit excavation processes, and is particularly best in sudden gushing treatment effect of the high confined water head stratum foundation pit.

A method of drilling a well is disclosed. A first estimate is obtained of a location of the well with respect to a reference well at a selected depth. A magnetic measurement is obtained at the selected depth using a sensor. The obtained magnetic measurement is related to a residual magnetic charge distribution in the reference well. An expected value of the magnetic measurement at the selected depth is determined from the residual magnetic charge distribution. A second estimate is obtained of the location of the well using the first estimate of the location, the obtained magnetic measurement and the expected value of the magnetic measurement. A drilling parameter of the well is altered using the second estimate of the location.

The invention relates to a device for positioning and detecting an accident well on the basis of a transient electromagnetic method. The device comprises a relief well and the accident well, an emitting electrode and a micro inertial measurement unit combination are arranged on a drill collar in the relief well at an interval, the micro inertial measurement unit combination comprises a three-axis flux-gate sensor, a gravity accelerometer and an underground receiving unit, the emitting electrode is connected with a high-power pulse generation circuit through a cable, the micro inertial measurement unit combination is sequentially connected with a ground receiving unit and a high-power power supply through cables, the high-power power supply can provide power for the high-power pulse generation circuit and the ground receiving unit, the emitting electrode receives current signals and generates a primary field, the primary field motivates an accident well sleeve to generate a secondary field, and signals received by the three-axis flux-gate sensor and the gravity accelerometer are transmitted to and processed in the underground receiving unit and are uploaded to the ground receiving unit. The device can be widely used in the processes of rescuing and detecting in the accident well, grade assessing of an accident and formulating of rescue schemes.

Methods and systems are provided for obtaining both magnetic and apparent resistivity ultra-deep reading electromagnetic measurements at the same time and/or by a single tool. The system can include a magnetometer, a current source electrode, a pair of voltage measuring electrodes, and a current return electrode. Using such a system can enable a lowering a tool into a relief well and obtaining both magnetic and apparent resistivity ultra-deep reading electromagnetic measurements in a single trip in order to provide a more accurate and faster determination of the distance and direction to a cased blown out well in order to shorten the time required to intersect and kill the blown out well.

The invention discloses a method for plugging a relief well of a deep foundation pit. The method comprises the following steps of (1) necessary preparation before relief well plugging; (2) plugging construction on the relief well, wherein after base plate construction is completed, a body structure meets anti-floating requirements, and a fixed water level in a relief well in the foundation pit is located 2-3m below a foundation pit face, the plugging construction on the relief well can be carried out, the relief well in a working state is firstly plugged in an interval mode due to a large water yield, after the relief well is partially plugged, the working state of the relief well which is not plugged continues to be observed and comprises the water yield condition, the variation value of the water level, the fixed water level elevation and the water pump position elevation, the rest of the relief well continues to be plugged in an interval mode, and time is earned for well plugging by increasing pump output. The method has the advantages that the relief well can be successfully plugged when underwater pressure or water inflow is large, plugging quality is good, construction cost is lowered, and the method is worthy of popularization and application.

The invention relates to the engineering technique for protecting a river dyke, in particular to a method for constructing a relief well, comprising the steps of: hole creating, hole cleaning, borepipe making and hoisting, filter material making and filling, hole flushing, pumping test and well top processing, etc. The method is characterized in that: in the hole creating step, a direct soil-borrowing type drilling machine is used to create holes, and created holes are protected by high polymer composite slurry; in the hole clean step, the high polymer composite slurry is directly used to clean holes, and the hole clean step includes a cyclic process of the recovery, the purification, the storage and the reutilization. The high polymer composite slurry is prepared by following components in portion by weight: 1000 portions of water, 70 to 130 portions of bentonite, 5 to 25 portions of polyacrylamide, 2 to 15 portions of cellulose ether, 0 to 9 portions of weight additive, 0 to 5 portions of industrial alkali and 0 to 3 portions of fluid loss additive, and the mixture is stirred into slurry by a swirling flow type pulping machine. The method has the advantages of easy and quick operation, high production efficiency, good product quality and long service life; moreover, in the process of construction, the method has the advantages of energy and water conservation, low cost, low noise and no pollution.

The invention relates to a relief well or a pressure measuring tube for monitoring a dike (dam) body in a water conservancy project. A cleaning method for pressure relief wells or piezometric tubes is proposed, which includes cleaning tool preparation, inserting the cleaning tubes into the relief wells or piezometer tubes, cleaning, and taking out the cleaning tubes from the well pipes, etc., wherein the cleaning tools include winches, air compressors, etc. And the cleaning tube, the cleaning tube includes a hard tube and a pressure-resistant hose, one end of the pressure-resistant hose extends into the proximal end of the hard tube, and the other end of the pressure-resistant hose is connected to the air compressor; when cleaning, move the hard tube And pressure-resistant hose, so that sedimentation and sewage can be discharged out of the relief well or piezometric tube through the hard pipe. The present invention has the following features: 1) Cleaning and sewage discharge are carried out at the same time, the cleaning effect is good, and a large amount of external water sources for cleaning can be saved. 2) Using the air suction method to discharge silt, the gravel, sand and silt at the bottom of the well (pipe) can be discharged out of the well (pipe), without being limited by the depth of the relief well or piezometric tube.

The invention relates to an omnibearing magnetostatic-field while-drilling positioning method and positioning system for a relief well. The method comprises: (1), a three-axis high-precision flux gate sensor, a three-axis acceleration sensor and a three-axis gyro are installed at a front end of an underground measurement exploring tube; (2), before going down a well, an operator measures a geomagnetic field vector affected by a drill head; (3), after an inclination stage task of a relief well is started, according to magnetic field measurement data obtained by the high-precision flux gate sensor, a measurement while drilling (MWD) exploring tube carries out space projection operation on each group of obtained magnetic field measurement values of a rescued well casing tube by combining attitude information of the MWD, thereby obtaining magnetic field component strength data of the magnetic field of the rescued well casing tube on a horizontal plane in a drilling direction and a direction perpendicular to the drilling direction; (4), least square operation is carried out on the obtained magnetic field component strength data of the rescued well casing tube after space projection of multiple times, thereby obtaining a spatial position of the drilling exploring tube relative to the rescued well casing tube; and (5), filter operation is carried out by a Kalman filter, so that a precise spatial position of a relief well exploring tube relative to the rescued well is obtained.

The invention provides a relief well dredging device which comprises a pipe body and a high-pressure water spraying pipe. The high-pressure water spraying pipe is aligned to a lower port of the pipe body, a pressure equalizing chamber is fixed outside the pipe body, the pressure equalizing chamber is communicated with a plurality of air delivery pipes and communicated with the pipe body through a plurality of air spraying pipes. High-pressure water sprayed by the high-pressure water spraying pipe impacts sludge and soil blocks deposited in a relief well to form granules, the granules and water are mixed to form slurry, high-pressure air is led into the pressure equalizing chamber through the air spraying pipes, compressed air in the pressure equalizing chamber is jetted towards the slurry inside the pipe body through the air spraying pipes, the pressure intensity of the compressed air in the pipe body is reduced, formed air bubbles rapidly expand and float upward, the slurry is sucked into the pipe body by utilizing negative pressure, and finally the slurry is carried out of the relief well. In the process, the air bubbles rolling in the slurry also accelerate slurry forming by utilizing the sludge and soil blocks in the pipe body. The relief well dredging device has the advantages of being good in dredging effect and high in working efficiency and saving water resources.

The invention relates to a deep foundation pit dewatering, purification and recharging all-in-one system and a control method, and belongs to the technical field of foundation pit engineering. The deep foundation pit dewatering, purification and recharging all-in-one system comprises a plurality of pressure relief wells located in a foundation pit, water pumps located in the pressure relief wells,a plurality of recharging wells located outside the foundation pit, an impounding reservoir, a purification tank and a recharging control system, wherein one end of a water inlet of the impounding reservoir is connected with a multi-way pipe I; a purification filter net is arranged in the purification tank; and the recharging control system comprises a multi-way pipe II and a water valve and a water meter which are arranged on the multi-way pipe II. The deep foundation pit dewatering, purification and recharging all-in-one system can realize all-in-one operation of pressure relief by the pressure relief wells in the foundation pit, initial settlement by the impounding reservoir, effective purification of water by the purification tank and control over water levels in the recharging wellsby the recharging control system, can effectively make use of water resources, and is simple in structure, convenient to operate and low in cost. Meanwhile, the invention further provides a control method of the deep foundation pit dewatering, purification and recharging all-in-one system.

A method for constructing relief well in high quality includes applying positive circulation to drill hole, using slurry as retainer of hole and hole wall, using high quality of stabilizing liquid to replace slurry as retainer of hole and removing off mud skin on hole wall after designed depth of hole is reached then applying high quality of stabilizing liquid as retainer of complete hole after said mud skin on hole wall is removed off.

The invention discloses a gripping device for a falling object in a pressure-relief well. The gripping device comprises a pipe body and a gripping component; the gripping component comprises a lifting rod, at least three connecting rods and at least three claw hooks, wherein the lifting rod is arranged inside the pipe body, the upper parts of the claw hooks are hinged to the lower end of the pipe body, the middle part of each claw hook is hinged to one end of the corresponding connecting rod, and the other ends of the corresponding connecting rods are hinged to the lower end of the lifting rod. Under the effect of self gravity, the lifting rod of the gripping component moves to drop, the lifting rod drives the connecting rods to move relatively, and further drives the at least three claw hooks to stretch outward along the lower end of the pipe body, the device is vertically placed inside the pressure-relief well so as to enable a foreign object in the pressure-relief well to be positioned among the claw hooks, the lifting rod is pulled upward, the claw hooks are gathered together to be close to the direction of the lifting rod under the effect of the corresponding connecting rods until the foreign object is gripped firmly, finally, the relative position between the lifting rod and the pipe body is kept, the device is integrally lifted, and the foreign object is discharged out of the pressure-relief well.

The invention belongs to the technical field of underground resource drilling engineering, and particularly relates to a current signal emission source down-hole three-electrode system which comprises an upper halter, a lower halter, an electrode system outer shell, an electrode pushing and supporting mechanism and an electrode conduction unit. The current signal emission source down-hole three-electrode system is characterized in that the upper halter and the lower halter seal the upper end and the lower end of the electrode system outer shell respectively, and the electrode pushing and supporting mechanism is arranged in the electrode system outer shell and pushes the electrode conduction unit to be opened and closed. The current signal emission source down-hole three-electrode system can effectively increase the magnitude of currents which are injected to a ground layer through a signal emission source, low-frequency alternating currents collected on an sleeve pipe of an accident well are further increased, so that a relatively-large low-frequency alternating magnetic field generated through the low-frequency alternating currents collected on the sleeve pipe of the accident well can be detected through an exploring tube in a relief well, the distance measuring range of a relief well and accident well communication detection system is easily enlarged, and the current signal emission source down-hole three-electrode system is better suitable for deep well communication directional drilling engineering.

The invention discloses a deep foundation pit piping erosion blocking method. The deep foundation pit piping erosion blocking method comprises the steps that firstly, a water gushing hole is filled byadopting steel tubes and quilts, and the water quantity is reduced preliminarily; then a steel retaining cylinder is driven into a soil body to the certain depth from the upside of the water gushinghole, and a cofferdam is formed; then, pea grit, graded broken stone and block stone are sequentially added into the steel retaining cylinder to form a filtering material, and piping erosion with sandis avoided; meanwhile, at least two pressure relief wells are arranged around a piping erosion point according to the piping erosion condition; in the next step, the existing steel retaining cylinderis heightened, the water pressure is balanced, and preparations are made for still water grouting; and finally, drilling grouting is carried out around a piping erosion port to form a water-resistinglayer so as to block the piping erosion point. The construction is rapid, the condition of the piping erosion with the sand can be avoided within a relatively short time, the piping erosion conditionis prevented from being further expanded, the dangerous circumstance is stabilized preliminarily, and the blocking effect can be exerted on the piping erosion point through the subsequent compactinggrouting treatment.

The invention relates to a method for connecting a titanium aluminum turbine and a steel shaft. The method comprises the titanium aluminum turbine (1), a turbine dorsal disk (2), a turbine internal thread (3), a pressure relief well (4), the steel shaft (5) and a shaft end matching thread (6), wherein the titanium aluminum turbine (1) is connected with the steel shaft (5) through the turbine dorsal disk (2); the shaft end external thread of the steel shaft (5) is connected with the internal thread of the turbine dorsal disk (2); the titanium aluminum turbine (1) is fixedly connected with the turbine dorsal disk (2) through bolts. The method overcomes the difficulties caused by welding connection, and the connecting method is simple and convenient and easy to implement.

The invention provides a bag grouting well wall sealing structure. The structure is characterized by comprising a bag and a grouting pipe; the bag is fixed on the outer wall of a well pipe; the bag isconnected with the grouting pipe, and a grouting port of the grouting pipe extends to the ground; after the bag is grouted, the bag is expanded to a hole wall original soil body to be in full contactwith the original soil body or is expanded to be embedded in the original soil body. The bag grouting well wall sealing structure has the advantages that 1, the operation is simple, the effect is reliable, the purpose of well wall sealing can be achieved quickly; 2, the well wall sealing effect can be maximally improved, and the effect of resisting confined groundwater head pressure of the well wall can be improved, thereby ensuring the sealing effect of the well wall a relief well or recharge well.

The invention discloses equipment, in particular a relief well washing and grappling combined system for water engineering, which comprises four parts, namely air supply equipment, hoisting equipment, grappling equipment and water outlet equipment. The air supply equipment consists of a tyre type air compressor, a flexible duct and a hard duct; the hoisting equipment consists of a triangular support, a hoisting cable, a fixed windlass and a diesel engine; the grappling equipment is a three-tooth jet-grab-cone; and the water outlet equipment is a seamless steel pipe. The relief well washing and grappling combined system has the advantages of simple, reasonable and applicable structure, convenient operation, novel design, adaption to different geographical conditions and good washing and grappling effect, and is simple and practical.

The invention relates to a ground device used for a relief well electromagnetic detection and positioning tool. The ground device comprises a cable which is arranged on a Martin-Decker photoelectric coder in a winding way. One end of the cable is connected with an acquisition device. The ground device also comprises a test data processing subunit, a depth data acquisition subunit, a data communication subunit and a control system. The other end of the cable is connected with the test data processing subunit. The test data processing subunit receives test data transmitted by the acquisition device arranged in a relief well and transmits the test data to the control system through the data communication subunit. The depth data acquisition subunit receives pulse data transmitted by the Martin-Decker photoelectric coder and converts the pulse data into depth data of the acquisition device in the relief well and then transmits the depth data to the control system through the data communication subunit. The control system comprises a data initialization subunit and a data display subunit. The data initialization subunit receives the test data and the depth data transmitted by the data communication subunit and respectively transmits the test data and the depth data to the data display subunit to be displayed.

A system and method for establishing hydraulic communication between relief and target wells, wherein a relief well is drilled to include a portion of the target wellbore that is axially offset from and substantially parallel to a portion of the relief wellbore. A perforating system is carried by a tubing string in a cased portion of the relief well. The perforating system includes a latch assembly, a non-rotational packer and perforating gun having charges radially oriented in a limited direction. Tubing string parameters are obtained during the run-in of the perforating system, and thereafter the tubing string parameters are utilized to engage the latch assembly with a latch coupling carried by the casing in the relief wellbore. Axial and rotational forces are applied to the tubing string to engage the latch assembly. Discharge of the perforating gun yields perforations only between the relief well and target well, establishing fluid communication.

The invention discloses an engineering non-fines concrete water storage and pressure relief well anti-floating structure and an implementation method thereof, and relates to the technical field of mines. The engineering non-fines concrete water storage and pressure relief well anti-floating structure comprises an emergency pool and a water storage and pressure relief well, wherein the water storage and pressure relief well is arranged at a water source gushing point on the edge of the emergency pool. The emergency pool comprises an emergency pool body, an overflow pipe and a drainage pipe, theoverflow pipe is installed at the top of an inner cavity of the emergency pool body, the drainage pipe is installed at the bottom of the inner cavity of the emergency pool body, and the drainage pipecorresponds to the overflow pipe. The water storage and pressure relief well comprises a gravel layer and a shaft, the gravel layer is buried under the ground, the shaft is arranged at the top of thegravel layer, and part of the shaft is arranged under the ground. According to the engineering non-fines concrete water storage and pressure relief well anti-floating structure and the implementationmethod thereof, underground water can be collected, so that the buoyancy to the bottom of the emergency pool is reduced, the anti-floating effect is achieved, and the collected underground water is supplied to other places as production and greening water and is supplied for production and domestic water.

The invention relates to the technical field of fire extinguishment for buildings, in particular to a pressure relief well. The pressure relief well comprises a main pressure relief well body for forming a pressure relief well cavity; the main pressure relief well body comprises an indoor part arranged in the building indoor space and an outdoor part bulging out of the roof of the building from the indoor part; the indoor part comprises one or more pressure relief ports communicating with the pressure relief well cavity and the building indoor space; the outdoor part comprises an exhaust port communicating with the pressure relief well cavity and the building outdoor space; and a normally-closed smoke discharging fire damper is mounted on each pressure relief port. With the pressure relief well, the outer wall structure of the building can be complete and reliable while gas fire-extinguishment and pressure relief in a protection zone is realized, and the appearance is better. Besides, with the pressure relief well, the indoor temperature control effect by the aid of an air conditioner cannot be affected, temperature control by the aid of the air conditioner is more energy-saving and efficient, the cleanliness of the indoor environment is guaranteed, and the service life of indoor equipment or products can be prolonged.

The invention provides a high-rise deviation rectifying drainage well construction device, a pressure relief well construction device and a deviation rectifying method. The high-rise deviation rectifying drainage well construction device comprises an outer casing pipe, an inner pipe and a pipe tip, the pipe tip comprises a large-diameter pipe, a circular steel plate, a guide pipe fitting and a small-diameter pipe, the large-diameter pipe, the circular steel plate and the small-diameter pipe are coaxially welded and fixed in sequence, the guide pipe fitting is in a horn shape and fixed outsidethe small-diameter pipe in a sleeving mode, the large end of the guide pipe fitting is welded and fixed to the circular steel plate, the small end of the guide pipe fitting is welded and fixed to thesmall-diameter pipe, the outer diameter of the outer casing pipe is matched with the inner diameter of the large-diameter pipe, one end of the outer casing pipe is inserted into the large-diameter pipe, a lubricating oil layer is arranged between the outer casing pipe and the large-diameter pipe, and the inner pipe is inserted into the outer casing pipe. According to the high-rise deviation rectifying drainage well construction device, the pressure relief well construction device and the deviation rectifying method, the device structure is simple, the cost is low, the method is easy to operate, construction time is short, and safety is high.