30results about How to "Avoid falling well accidents" patented technology

The invention discloses a landing door with an opening protecting function. The landing door is connected to an upper bank of the landing door through a door hanging panel, a landing door lock is arranged on the door hanging panel, a lock body and a rotating center are arranged on the landing door lock, and a primary unlocking device and an auxiliary unlocking device are arranged on the landing door; a landing door opening protective device comprises a sensor, a flexible locking device and a limiting device; the flexible locking device is arranged on the landing door hanging panel, and the limiting device is arranged on the upper bank of the landing door. The landing door disclosed by the invention has the advantages that the primary unlocking device and the auxiliary unlocking device can diversify the unlocking modes of the landing door lock; an inching switch and an indicating lamp are arranged to master whether the primary unlocking device unlocks the landing door lock smoothly or not; the sensor and the unlocking protective device are arranged to guarantee that a car is in the floor, so that a well-falling accident is avoided.

The invention discloses an elevator comprising an elevator shaft and a lift car; each layer of the elevator shaft is provided with an elevator opening; an elevator door is mounted at the elevator opening; the lift car is positioned inside the elevator shaft; even number of safe devices are mounted inside the elevator shaft; every two safe devices are set as a group, the safe devices of the same group are positioned at a same installation height, one is positioned at the elevator opening and the other is positioned at the other side, corresponding to the elevator opening, of the elevator shaft; the number of the safe device groups is identical to that of the elevator openings of the elevator; the safe device comprises a support board, a gear and a track; the elevator shaft is provided with an installing hole; the track is laid in the installing hole; the support board is provided with a rack; the gear is engaged with the rack; the gear is installed inside the installing hole; the gear is driven by a motor which is connected to a controller; a controller switch is installed inside the lift car. By means of the elevator of the invention, falling accidents are avoided when elevator wire ropes are broken.

The invention discloses a height-adjustable well lid structure which comprises a well lid base and a well lid plate, wherein four support blocks are arranged on the well lid plate, and uniformly distributed on the lower surface of the well lid plate; the profile of the well lid base is ring-shaped; the lower surface of the well lid base is a flat straight plane; the upper surface of the well lid base is a heaved surface; N groups of fixed grooves used for being connected with the support blocks are formed in the well lid base; heat-resistant layers are arranged on the surfaces of the well lid base and the well lid plate. According to the height-adjustable well lid structure provided by the invention, different fixed groove groups are replaced to achieve different well lid plate heights, so that the flat surface with the same height as the pavement is realized, and the potential safety hazards of automobiles passing by the well lid structure are eliminated; besides, the highest fixed groove group is adopted to enable the well lid plate to be highest, so that the drainage volume of pavements in rainy days is greatly increased, and accidents that people fall into wells in rainy days are effectively avoided without the adoption of the traditional manner of eliminating well lids; therefore, the well lid structure is safe and practical.

The invention discloses a safety protection device for a wellhead of a pumping unit. The safety protection device for the wellhead of the pumping unit comprises a base. A plurality of sets of mountingholes are formed in the edge of the base. Fixing columns are arranged in the mounting holes. Circular mounting openings are formed in the upper end face of the base. Annular protective plates are vertically and fixedly arranged between the circular mounting openings and the edge of the base. The two sides of the annular protective plates are connected with a horizontal U-shaped insertion rod in asleeved mode by through holes. The end, near the center of the base, of the horizontal U-shaped insertion rod, located at the inner side of the annular protective plates is fixedly provided with an arc-shaped plate. Springs are arranged on the outer portions of the upper and lower ends of the horizontal U-shaped insertion rod between the inner side of the annular protective plates and the middleof the outer side of the arc-shaped plate in a sleeved mode. Screws are installed at the middle of the horizontal U-shaped insertion rod and the middle of the outer side of the arc-shaped plate through bearings. According to the safety protection device for the wellhead of the pumping unit, the annular protective plates and protective cover are arranged to completely protect the wellhead, the structure is stable, the accident of falling into a well caused by the overturn of the protective cover is prevented, the safety is high, and the adjustable arc-shaped plate enlarges the application scopeof the device.

The invention discloses a novel anti-torsion small drill collar joint which comprises a connection sleeve. An upper joint is arranged inside the upper end of the connection sleeve, a lower joint is arranged inside the lower end of the connection sleeve, the upper joint and the lower joint are connected through a spline and a spline groove, and a first sealing ring is arranged on a contact face; the connection sleeve and the upper joint are connected through a thread, and a second sealing ring is arranged on a contact face; the connection sleeve and the lower joint are connected through a thread, and a third sealing ring is arranged on a contact face. Torque transmission and tension and pressure transmission are separated, so that threaded connection portions do not bear torque and tensionand pressure at the same time any more, torsional strength and tensile strength of a pipe column are enhanced, operation requirements are met, and tool service life is prolonged; operation requirements on forward rotation and reverse rotation in the process of salving a fish can be met, the problem of drill collar thread backoff due to rotation of the pipe column in the process of operation is avoided, and downhole accidents are reduced.

The invention provides a multi-functional multi-component composite inspection cover well. The well comprises a well lid and a wellbore which are matched with each other, wherein the well lid is formed by performing rubber coating and rolling on an annular or spiral framework, the wellbore is composed by at least two sections of telescopic cylinders with internal and external threads, wherein, thetwo sections of telescopic cylinders are connected in a sleeving mode, a locking mechanism is arranged at the joint of the well lid and the wellbore, and an anti-falling mechanism is arranged in thewellbore. According to the well, the well lid and the wellbore are made of novel materials, light in weight, high in strength, acid-resistant, alkali-resistant and long in service life.

The invention discloses an agricultural irrigation device. The agricultural irrigation device comprises a water intake pipe, a water pump and a water drain pipe which are sequentially connected, wherein a filtering device is arranged at the bottom end of the water drain pipe; a telescopic mechanism is arranged at the center of the water drain pipe; the top end of the water drain pipe is movably connected with a rotary spray head; a water stop gate is arranged under the rotary spray head; a detachable activated carbon filter element is arranged in the filtering device. The agricultural irrigation device has the advantages that the equipment is simple, the crop irrigation requirement can be met, and the labor force is saved.

The invention relates to a while-drilling measuring instrument self-locking device and method. According to the technical scheme, the while-drilling measuring instrument self-locking device comprisesa self-locking mechanism and an instrument connector, an outer cylinder is arranged on the outer side of a salvage head, three slip grooves are evenly distributed on the outer cylinder in the circumferential direction, slips are placed in the slip grooves, a bevel body is arranged in the outer cylinder, and the bevel body is connected to the lower portion of the salvage head in a threaded mode, and the upper portion of the bevel body is connected to the lower portions of the slips. A locking spring is arranged at the upper end of the bevel body, the instrument connector is arranged on the lower portion of the outer cylinder, small springs are installed on a shell of the instrument connector in a sleeving mode, loose pulleys are arranged on the lower portion of the small springs, semicircleclamping clacks are arranged on the lower portion of the loose pulleys, and a ten-core seat assembly is arranged in the shell of the instrument connector. The while-drilling measuring instrument self-locking device and method has the beneficial effects that the while-drilling measuring instrument self-locking device and method can prevent the instrument from bonding-off when drilling down, a one-way valve is no longer used, the cost and trouble are reduced, the instrument is prevented from falling into a well, the instrument is protected, and the safety is improved; a centralizer is equivalent to a durable measuring instrument centralizer assembly; and the instrument is salvageable.

The invention relates to a portable connecting bolt of B type tongs for well drilling. The upper end face of a bolt body is provided with a lockpin slot with an opening in the upper end, and the a cylindrical stainless steel lockpin is inserted into the lockpin slot in a connected manner; one end of the lockpin is provided with a lockpin head, and the other end of the lockpin is provided with a lockpin open slot; a spring bolt is inserted into the lockpin open slot in the connected manner, and the width of the spring bolt is smaller than the diameter of the lockpin; the length of the lockpin is larger than the diameter of the lockpin, and the spring bolt is connected to a spring bolt pin in an inserted manner; the two ends of the spring bolt pin are fixed in the two side walls of the lockpin open slot; a lockpin gland covers the lockpin slot, and the front and rear sides of the lower end face of the lockpin gland are welded with the upper end face of the bolt body; the middle part, inthe front and back direction, of the lockpin gland is provided with a protruding lockpin gland boss embedded into the upper end of the lockpin slot, and the lower end face of the lockpin gland boss isprovided with a boss groove which is sunken upwards; and the upper part of the lockpin is embedded into the boss groove. The bolt is easy to remove and install, and the working efficiency is improvedgreatly, and the accident that an object falls from a wellhead does not occur.

The invention discloses a safe elevator comprising an elevator shaft and a lift car; each layer of the elevator shaft is provided with an elevator opening; an elevator door is mounted at the elevator opening; the lift car is positioned inside the elevator shaft; even number of safe devices are mounted inside the elevator shaft; every two safe devices are set as a group, the safe devices of the same group are positioned at a same installation height, one is positioned at the elevator opening and the other is positioned at the other side, corresponding to the elevator opening, of the elevator shaft; the safe device comprises a cylinder, an extension spring and a support board; one end of the support board is hinged to the elevator shaft; one end of the extension spring is connected to the elevator shaft and the other end is connected to the support board; a pedestal of the cylinder is mounted on the elevator shaft; a push rod of the cylinder is hinged to the lower surface of the support board; the cylinders of all safe devices are connected to one controller; a switch of the controller is installed inside the lift car. By means of the safe elevator of the invention, falling accidents are avoided when elevator wire ropes are broken.

The present invention discloses a fixing device for downhole rod and pipe, including first cylinder, second cylinder mounted in one end in the first cylinder and conical cylinder mounted in another end in the first cylinder. The described conical cylinder is made up by adopting the material whose hardness is less than at GFRP, and the internal surface of the conical hole of the first cylinder andthe external surface of the conical cylinder are identical in taper, so that they are tightly contacted. Between the described second cylinder and the described conical cylinder a washer is set, and the first cylinder and second cylinder are screw-connected between them, on the radial position of the first cylinder the screw is set, and on the walls of first cylinder, second cylinder, conical cylinder and washer the opening mechanisms are respectively set.

The invention relates to a suspending device for preventing a rotary guiding tool from falling into a well. The suspending device is composed of a suspending system, a tool upper body system, a tool lower body system and a universal joint. The suspending device can prevent accidents that underground tools fall into the well due to fatigue failure of the universal joint effectively. A suspending outer jacket adopts a left spiral thread and a locking nut connecting a drill bit adopts a right spiral thread, so that a pushed outer sleeve can be locked in the tool lower body system effectively, andthe bit pressure that the universal joint is in contact with the tool lower body can be shared effectively, and therefore, the service life of the universal joint is prolonged to a certain extent. Alower solid of the universal joint and a lower side of the pushed sleeve are mounted by using a hexagonal structure, so that contact positioning is facilitated and workshop assembly is facilitated.

The invention discloses a piping shaft and a monitoring system and a construction method thereof. The piping shaft comprises an upper well body and a lower well body which are integrally prefabricated and formed, a well ring is arranged at the top of the upper well body, and a base is arranged at the bottom of the lower well body; the well lid is arranged on the upper well body and is connected with the well ring in an openable and closable matching manner; the upper well body and the lower well body are spliced and connected into an integral pipeline well body, a cavity is formed in the pipeline well body, and pipeline windows communicated with the cavity are formed in the two ends of the pipeline well body. The pipeline well is divided into the upper well body and the lower well body, the upper well body and the lower well body are integrally prefabricated and formed through high polymer materials and fixed through bolts, and the pipeline well is simple in structure, convenient to install and maintain, short in construction period and low in cost. The pipeline well body is in the shape of an ellipsoid, so that the pipeline well body achieves the maximum compressive strength on unit materials. The opening state of the well lid, the liquid level state in the well, the air state in the well and the like are monitored through the intelligent monitoring system, and the use safety and supervision convenience of the pipeline well are improved.

The invention provides an all-metal screw drill. Usually, an all-metal screw drill is composed of a multi-screw hydraulic motor assembly, a transmission shaft assembly and an inside engaged gear, the common inside engaged gear is prone to abrasion in a drilling fluid environment, and the gear is prone to being disengaged to cause fall-into-well accidents after a shell is fractured. An inside engaged gear of the screw drill is made from solid carbide and designed to be a straight gear and is capable of being machined through a linear cutting machining method; an anti-falling ring or an anti-falling disc is mounted on the gear to prevent gear disengagement; and the all-metal screw drill can effectively prevent the fall-into-well accidents caused by shell fracturing, and the service life of the inside engaged gear is long.

A normally-closed type electric car stopper is composed of electric pushers, a control device of the electric pushers, a pulling rod, a rotary shaft and car stop blocks. The two electric pushers are respectively provided with a motor inside, the pulling rod is arranged between two motor pushing rods, a reset spring is arranged between each pushing rod and an upper frame, the lower end of the pulling rod is connected with a connecting rod, the connecting rod is connected with the rotary shaft through a transmission device, the two car stop blocks are arranged on the rotary shaft, and grooves are formed in the corresponding positions of the car stop blocks. The electric pushers are connected with the control device. The normally-closed type electric car stopper has the advantages that automatic control is achieved, the structure is simple, design is reasonable, maintenance is convenient, a whole hydraulic transmission mechanism is located above the ground and dragged by the two electric pushers, and stable and efficient operation of a mine car is guaranteed through multiple protection measures.

The invention discloses a falling-into-well prevention device for an elevator. The falling-into-well prevention device comprises at least one stand column, swing rods and guide wheels, wherein the stand columns are arranged on the hoistway wall on one side of an elevator landing door, at least one swing rod is arranged corresponding to each stand column, and one end of each swing rod is hinged to the corresponding stand column; one guide wheel is arranged corresponding to each swing rod, and each guide wheel is arranged on an elevator car door. Along with the opening of the elevator car door, the guide wheels abut against the swing rods so that each swing rod can swing from a first working position to a second working position, wherein a large included angle is formed between the first working position and the corresponding stand column, and a small included angle is formed between the second working position and the corresponding stand column; along with the closing of the elevator car door, the swing rods are released by the guide wheels so that each swing rod can swing from the second working position to the first working position. Through blocking of the swing rods, it can be effectively avoided that because a passenger enters the elevator by mistake when the landing door is already open but an elevator car is not in a specific position, a falling-into-well accident is caused, and the falling-into-well prevention device is low in manufacturing cost and good in safety.

The invention relates to a safety rope socket and a fuse calculation method for the same in order to overcome the defects that if the prior downhole steel wire operation gets stuck, break points of steel wire and the rope socket are indefinite, the falling accidents happen after the steel wire is broken, and the difficulty in handling the accidents is increased. The safety rope socket comprises a taper sleeve (2) and a taper rod (3). The sectional areas of the upper and lower end parts of a fuse (5) are larger than that of a middle part. One end of the fuse (5) is fixedly connected with the lower end of the taper sleeve (2), while the other end is fixedly connected with an external cylinder (1). The fuse (5) and the lower end of the taper sleeve (2) are connected through a pin I (4); and the fuse (5) and the external cylinder (1) are fixedly connected with each other through a pin II (6). The lower end part of the external cylinder (1) is connected with threads; and a fishing neck (7) is arranged on the external surface of the external cylinder (1). The safety rope socket has the advantages that: the safety rope socket has a simple structure and convenient operation, correctly determines the rupture tensile force value of a safety device, effectively avoids the occurrence of fishing accidents of broken steel wires, and ensures the normal process of the production operation.

The invention discloses a well mouth quick locking steel wire rope multiple protection device for petroleum exploitation. The device comprises a steel wire rope roller (1), a well mouth high-pressure injection preventing pipe (4) and a well mouth injection preventing machine (6), and is characterized by further comprising a roller contact device (2), a first locking steel wire rope device (3) and a second locking steel wire rope device (5); the first locking steel wire rope device (3), the well mouth high-pressure injection preventing pipe (4), the second locking steel wire rope device (5) and the well mouth injection preventing machine (6) are fixedly connected in sequence; the roller contact device (2) and the second locking steel wire rope device (5) are correspondingly arranged; and a steel wire of the steel wire rope roller (1) penetrates through the roller contact device (2) to extend to the first locking steel wire rope device (3). The device can prevent such accidents as falling of salvaging tools into a well due to sudden rupture of the steel wire rope, can detect rupture of the steel wire rope and lock the steel wire rope for the first time to prevent the well falling accidents, and simplifies the accident processing procedures.

The invention relates to a mixed drill bit which comprises a drill bit body, a bit leg and a cone; a stop groove is formed in the drill bit body; the bit leg is fixed on the drill bit body and is provided with a stop block matched with the stop groove; and the cone is fixed on the cone leg. When the cone is subjected to thrust in the radial direction of the drill bit body, the inner wall of the stop groove stops the stop block from moving in the radial direction of the drill bit body. According to the mixed drill bit, when the cone is subjected to outward thrust in the radial direction of the drill bit body and drive the bit leg to tend to move outwards at the same time, the stop block and the stop groove bear most thrust, so that the connection strength between the bit leg and the drill bit body is enhanced, the connection reliability between the bit leg and the drill bit body is guaranteed, and cracking of the bit leg and the drill bit body and falling of the bit leg into a well are avoided.

A normally-closed type electric car stopper is composed of electric pushers, a control device of the electric pushers, a pulling rod, a rotary shaft and car stop blocks. The two electric pushers are respectively provided with a motor inside, the pulling rod is arranged between two motor pushing rods, a reset spring is arranged between each pushing rod and an upper frame, the lower end of the pulling rod is connected with a connecting rod, the connecting rod is connected with the rotary shaft through a transmission device, the two car stop blocks are arranged on the rotary shaft, and grooves are formed in the corresponding positions of the car stop blocks. The electric pushers are connected with the control device. The normally-closed type electric car stopper has the advantages that automatic control is achieved, the structure is simple, design is reasonable, maintenance is convenient, a whole hydraulic transmission mechanism is located above the ground and dragged by the two electric pushers, and stable and efficient operation of a mine car is guaranteed through multiple protection measures.

The invention discloses a safe locking device for a rotary blowout preventer and a locking method. The safe locking device comprises a safe bolt pin, a bolt pin deck and a self-locking device (5). Thesafe bolt pin comprises a large lug nut (1) and a bolt pin screw (3). The bolt pin deck comprises a first bolt pin deck body (2) and a second bolt pin deck body (4). The first bolt pin deck body (2)is fixed to one side of an opening in the top of a shell clamp of the rotary blowout preventer, the second bolt pin deck body (4) is fixed to the other side of the top of the opening of the shell clamp of the rotary blowout preventer, one end of the bolt pin screw (3) is rotationally fixed to the second bolt pin deck body (4), the other end of the bolt pin screw (3) is connected with the large lugnut (1), the large lug nut (1) can be locked on the first bolt pin deck body (2), the self-locking device (5) is fixed to the top of the shell clamp of the rotary blowout preventer, the self-lockingdevice and the first bolt pin deck body are arranged at the positions of the opening in the same side of the shell clamp of the rotary blowout preventer, and the self-locking device can be clamped into the large lug nut.

The invention discloses a safety protection device for a wellhead of a pumping unit. The safety protection device for the wellhead of the pumping unit comprises a base. A plurality of sets of mountingholes are formed in the edge of the base. Fixing columns are arranged in the mounting holes. Circular mounting openings are formed in the upper end face of the base. Annular protective plates are vertically and fixedly arranged between the circular mounting openings and the edge of the base. The two sides of the annular protective plates are connected with a horizontal U-shaped insertion rod in asleeved mode by through holes. The end, near the center of the base, of the horizontal U-shaped insertion rod, located at the inner side of the annular protective plates is fixedly provided with an arc-shaped plate. Springs are arranged on the outer portions of the upper and lower ends of the horizontal U-shaped insertion rod between the inner side of the annular protective plates and the middleof the outer side of the arc-shaped plate in a sleeved mode. Screws are installed at the middle of the horizontal U-shaped insertion rod and the middle of the outer side of the arc-shaped plate through bearings. According to the safety protection device for the wellhead of the pumping unit, the annular protective plates and protective cover are arranged to completely protect the wellhead, the structure is stable, the accident of falling into a well caused by the overturn of the protective cover is prevented, the safety is high, and the adjustable arc-shaped plate enlarges the application scopeof the device.

The invention discloses a downhole positioning device and belongs to the technical field of downhole monitoring. The downhole positioning device comprises a main body structure, a linkage rod, at least two supporting arms and supporting arm shells; the linkage rod comprises a rod main body, a salvaging cap positioned at one end of the rod main body as well as a clamping groove structure positionedat the other end of the rod main body; the main body structure is in sleeving connection with the rod main body; the main body structure is connected with the supporting arm shells; each supporting arm comprises a supporting arm main body and a clamping structure positioned at one end of the supporting arm main body; the clamping structure is arranged in the clamping groove structure; a supporting point is arranged between the clamping structure and the supporting main body; and each supporting arm is movably connected with the supporting arm shell through the supporting point. The downhole positioning device can fix a monitoring instrument underground and can fix the underground position of the monitoring instrument without a steel wire or a cable compared with the prior art, so that thefall-into-well accident caused by breakage under the corrosion of the steel wire or the cable is avoided and the monitoring reliability and safety of an oil water well are improved.

The invention discloses a height-adjustable well lid structure which comprises a well lid base and a well lid plate, wherein four support blocks are arranged on the well lid plate, and uniformly distributed on the lower surface of the well lid plate; the profile of the well lid base is ring-shaped; the lower surface of the well lid base is a flat straight plane; the upper surface of the well lid base is a heaved surface; N groups of fixed grooves used for being connected with the support blocks are formed in the well lid base; heat-resistant layers are arranged on the surfaces of the well lid base and the well lid plate. According to the height-adjustable well lid structure provided by the invention, different fixed groove groups are replaced to achieve different well lid plate heights, so that the flat surface with the same height as the pavement is realized, and the potential safety hazards of automobiles passing by the well lid structure are eliminated; besides, the highest fixed groove group is adopted to enable the well lid plate to be highest, so that the drainage volume of pavements in rainy days is greatly increased, and accidents that people fall into wells in rainy days are effectively avoided without the adoption of the traditional manner of eliminating well lids; therefore, the well lid structure is safe and practical.

The invention discloses a landing door with an opening protecting function. The landing door is connected to an upper bank of the landing door through a door hanging panel, a landing door lock is arranged on the door hanging panel, a lock body and a rotating center are arranged on the landing door lock, and a primary unlocking device and an auxiliary unlocking device are arranged on the landing door; a landing door opening protective device comprises a sensor, a flexible locking device and a limiting device; the flexible locking device is arranged on the landing door hanging panel, and the limiting device is arranged on the upper bank of the landing door. The landing door disclosed by the invention has the advantages that the primary unlocking device and the auxiliary unlocking device can diversify the unlocking modes of the landing door lock; an inching switch and an indicating lamp are arranged to master whether the primary unlocking device unlocks the landing door lock smoothly or not; the sensor and the unlocking protective device are arranged to guarantee that a car is in the floor, so that a well-falling accident is avoided.

The invention belongs to the technical field of petroleum, and particularly relates to a catcher used in the well logging process. The catcher is used for preventing instruments from dropping into a well in the process of measuring high-low pressure of an oil and gas well site in the petroleum industry and in the operation process of lifting and dropping steel wires and cables. According to the technical scheme, the catcher used in the well logging process comprises a catcher outer cover which is cylindrical in shape. The inner diameter of the lower end of the catcher outer cover is smaller than the inner diameter of the upper end, an external thread which is arranged on the outer upper portion of the catcher outer cover is connected with a blowout prevention box, a thread on the inner upper portion of the catcher outer cover is connected with an adjusting elastic piece, a slip is arranged on the inner lower portion of the catcher outer cover, and a control spring is arranged between the slip and the adjusting elastic piece. According to the technical scheme, the catcher is simple in structure and small in size, the catcher is installed inside a blowout prevention pipe, a sealing device does not need to be additionally arranged, and the catcher has the catching function of preventing the instruments from accidentally dropping into the well.

The invention relates to a safety rope socket and a fuse calculation method for the same in order to overcome the defects that if the prior downhole steel wire operation gets stuck, break points of steel wire and the rope socket are indefinite, the falling accidents happen after the steel wire is broken, and the difficulty in handling the accidents is increased. The safety rope socket comprises ataper sleeve (2) and a taper rod (3). The sectional areas of the upper and lower end parts of a fuse (5) are larger than that of a middle part. One end of the fuse (5) is fixedly connected with the lower end of the taper sleeve (2), while the other end is fixedly connected with an external cylinder (1). The fuse (5) and the lower end of the taper sleeve (2) are connected through a pin I (4); and the fuse (5) and the external cylinder (1) are fixedly connected with each other through a pin II (6). The lower end part of the external cylinder (1) is connected with threads; and a fishing neck (7)is arranged on the external surface of the external cylinder (1). The safety rope socket has the advantages that: the safety rope socket has a simple structure and convenient operation, correctly determines the rupture tensile force value of a safety device, effectively avoids the occurrence of fishing accidents of broken steel wires, and ensures the normal process of the production operation.

The invention relates to an anti-flipping device for lifting and lowering a secondary liner auxiliary disc of a frozen deep shaft. Steel wire ropes and protection ropes are installed on a hanging scaffold; the steel wire ropes are sleeved with steel pipes, the auxiliary disc is installed at the lower ends of the steel wire ropes, and multiple channel steels are uniformly welded to the bottom of the auxiliary disc along the outer side of the auxiliary disc. The device is simple in structure and convenient to use, and can effectively prevent the accident that personnel and templates on the discfall into the shaft because the auxiliary disc is hit and turned over during construction of a secondary liner in the frozen deep shaft.

The present invention discloses a fixing device for downhole rod and pipe, including first cylinder, second cylinder mounted in one end in the first cylinder and conical cylinder mounted in another end in the first cylinder. The described conical cylinder is made up by adopting the material whose hardness is less than at GFRP, and the internal surface of the conical hole of the first cylinder and the external surface of the conical cylinder are identical in taper, so that they are tightly contacted. Between the described second cylinder and the described conical cylinder a washer is set, and the first cylinder and second cylinder are screw-connected between them, on the radial position of the first cylinder the screw is set, and on the walls of first cylinder, second cylinder, conical cylinder and washer the opening mechanisms are respectively set.