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 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 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 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 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 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.