595 results about "Blowout preventer" patented technology

The utility model relates to the technical field of gas extraction, in particular to an underground gas extraction blowout preventer, and mainly solves the technical problems that the existing gas extraction blowout preventer is high in spewing control difficulty, high in safety risk and high in sprayed slag cleaning workload. The device comprises a movable chassis, a deslagging box, a multi-way pipe, a drilling machine through pipe, a coal seam drilling pipe, a negative pressure pipe, a pressure relief buffer cover, a deslagging pipe and a pressure sensor. According to the device, gushing is detected through the pressure sensor, on-off of the negative pressure pipe and the slag discharging pipe is controlled in a feedback mode, dependence on manual experience is not needed, it can be guaranteed that gushing and corresponding equipment are started consistently, and the gushing control difficulty is greatly reduced; meanwhile, water and residual materials for slag spraying can be discharged into the slag discharging box through the slag discharging pipe in time to be collected, and the workload of slag spraying and cleaning is reduced; the device is further provided with a pressure relief buffer cover, when the pressure is too large due to gushing, buffering can be conducted through the pressure relief buffer cover, and damage to the device caused by the too large pressure is avoided.

The invention discloses an underwater wellhead angle adjusting tool and a using method thereof.The tool comprises a connecting disc, a connecting cylinder, a hydraulic cylinder and a hydraulic cylinder piston, the connecting cylinder is arranged below the connecting disc, the connecting disc is connected with a high-pressure wellhead feeding tool through bolts, and the high-pressure wellhead feeding tool is connected with a high-pressure wellhead; a hydraulic cylinder shell and a hydraulic cylinder piston of a hydraulic cylinder are arranged on the outer side of the connecting cylinder in a sleeved mode, the hydraulic cylinder piston moves downwards to drive a downward locking lining of the high-pressure well mouth to move downwards, the downward locking lining opens a locking ring of the high-pressure well mouth, and the high-pressure well mouth and the low-pressure well mouth are locked. According to the underwater wellhead angle adjusting tool, an angle-adjustable high-pressure wellhead is vertically installed on an inclined low-pressure wellhead, a hydraulic cylinder piston is controlled to move downwards through hydraulic drive, a downward locking bush is forced to open a locking ring, and the angle-adjustable high-pressure wellhead and the low-pressure wellhead are locked; hydraulic driving is achieved, and operation is easy; and well deviation is reduced, and installation of service tools, blowout preventers and Christmas trees is facilitated.

The invention belongs to the technical field of oil and gas drilling well control equipment, and particularly relates to a ram blowout preventer state confirmation method with a locking indication window, which comprises the following steps: arranging a transparent observation window on a blowout preventer shell, and calibrating the alignment position of the end face of a locking shaft and an inner side reference scribed line; after the locking action is executed, the alignment state is confirmed through multi-angle visual observation; a switchable auxiliary light source is integrated to eliminate visual interference; an industrial camera is used for collecting images, displacement deviation is recognized through an edge detection algorithm, and an alarm is given if the displacement deviation exceeds the limit; and generating an encrypted digital report containing a timestamp and equipment information, uploading the encrypted digital report to a monitoring platform, and supporting real-time check and electronic signature of a mobile terminal. Through three layers of mechanisms of standardized vision-mechanical mapping, optical enhancement and digital perception, high-reliability, high-compatibility and traceable locking state confirmation is realized.

A method includes actuating a blow-out preventer (BOP) by moving a ram using an electric motor. The method also includes capturing sensor data with one or more sensors as the BOP is electrically-actuated. The method also includes determining one or more parameters with a controller based upon the sensor data. The method also includes controlling the electric motor based upon the one or more parameters.

A method for quantitative evaluation of gas seal performance of an annular blowout preventer is provided. The equivalent average contact pressure of the tubing-rubber core sealing surface is acquired based on the principle of equivalent seal contact energy, the tubing-rubber core microscopic contact state is simulated by using elastic-plastic normal flattening contact between the rigid smooth flat plate and the uniformly distributed spherical micro-convex body rough plate, the actual contact area of the single spherical micro-convex body under the equivalent average contact pressure of tubing-rubber core sealing surface is acquired, and then the circumferential width and average height of the microscopic leakage channel at the tubing-rubber core contact interface are acquired, the gas leakage volume rate of gas through the tubing-rubber core interface is acquired by using the parallel plate model in hydrodynamics, and the gas leakage volume rate is compared to the allowable gas leakage volume rate.

The angle-adjustable underwater well mouth comprises a high-pressure well mouth, a low-pressure well mouth and a low-pressure well mouth extension sleeve, the high-pressure well mouth and the low-pressure well mouth are positioned and adjusted in direction through a first well mouth spherical pair, and the high-pressure well mouth and the low-pressure well mouth are locked through a locking ring; in the tie-back operation mode, a high-pressure well mouth is connected with a flexible insertion sealing pipe through a high-pressure well mouth thin-wall extension sleeve, a tie-back tail pipe hanger is arranged in a low-pressure well mouth extension sleeve, a guide cylinder is arranged at the upper end of the tie-back tail pipe hanger, and a guide head is arranged at the lower end of the flexible insertion sealing pipe. The flexible insertion sealing pipe can enter the tie-back tail pipe hanger under the guiding action of the guiding head and the guiding cylinder; in the non-tie-back operation mode, the common extension sleeve is connected below the high-pressure wellhead, and the sleeve string is connected below the common extension sleeve. The inclined high-pressure wellhead is adjusted to be approximately vertical as required, so that a service tool, a blowout preventer and a Christmas tree are convenient to mount, the stability of the wellhead is enhanced, and the operation risk is reduced.

The invention provides a deepwater semi-submersible drilling platform pressure control drilling MPD control system which comprises a platform rotary table face. A platform wellhead flow divider, a marine riser expansion joint, a marine riser tension ring, a marine riser rotation control pup joint, an MPD hydraulic control pup joint, an MPD marine riser annulus sealing device, a marine riser four-way joint, a drilling marine riser, an underwater blowout preventer set and a seabed underwater wellhead are sequentially connected to the platform rotary table face from top to bottom. The MPD hydraulic control pup joint is connected with a rotary control pup joint power unit through an umbilical cable I, an umbilical cable roller frame I and a cable hose, and the rotary control pup joint power unit is connected with a deepwater MPD electro-hydraulic control system main control station; the MPD marine riser annulus sealing device is connected with the annulus sealing device and the buffer manifold hydraulic power unit through an umbilical cable II, an umbilical cable roller frame II and a cable hose and is connected with the deepwater MPD electro-hydraulic control system master control station; the throttling hydraulic power unit is connected with the deepwater MPD electro-hydraulic control system master control station. According to the system, pressure regulation and control, equipment management and operation safety guarantee in the deepwater pressure-controlled drilling well are realized.

The invention discloses an automatic hard well shut-in method and system integrated with a petroleum drilling machine control system, and relates to the technical field of petroleum drilling machine well control. According to the method, the drilling working condition is monitored in real time, an overflow trigger index is calculated, the overflow risk in a shaft is judged, and a hard well shut-in process is started after an alarm is given; the position of a hook and the position of a drill rod joint are monitored in real time, a winch safety stop index is calculated, whether the operation state of the winch is safe or not is judged, the hook is automatically moved to the optimal stop point, and the winch is braked; top drive and slurry pump linkage control is started, a top drive and slurry pump linkage control coefficient is calculated, whether the static working condition before well control is met or not is judged, and equipment is stopped or a strategy is executed accordingly; monitoring the action of the blowout preventer and the state of the hydraulic system, calculating the consistency index of the action of the blowout preventer, judging whether the action of the blowout preventer meets the well shut-in requirement or not, and giving a strategy if the action does not meet the well shut-in requirement; real-time judgment of the overflow risk and automatic hard shut-in of the well can be achieved, the safety of the well mouth is guaranteed, and the risk of manual misoperation is reduced.

The invention relates to the technical field of oil drilling and production well control equipment, in particular to a composite sealing rotary blowout preventer capable of regulating and controlling pressure while drilling. The blowout preventer comprises an execution module, a transmission module and a pressure sensing module. According to the execution module, radial extrusion force is applied to the rubber core through a radial shrinkage mechanism composed of a rotating ring, a connecting rod and a push block, meanwhile, a piston outer sleeve is matched with an inner shell in the axial direction under the limiting effect of an adaptive ring, axial compression force is applied to the rubber core, and therefore composite sealing of the rubber core is achieved. The transmission module drives a transmission gear to be meshed with a gear seat through a motor and drives a rotating ring to rotate, and power is transmitted to the radial contraction mechanism. The pressure sensing module is used for monitoring wellhead pressure in real time and actively triggering the generator to operate according to pressure changes, and self-adaptive adjustment of the sealing state is achieved. The device is suitable for the PCWD working condition, active sealing adjustment can be achieved based on wellhead pressure changes, the sealing reliability is improved in an axial and radial composite compression mode, and the device is particularly suitable for complex stratums, pressure fluctuation and continuous drilling scenes.

Systems, methods, and devices for blowout preventer independent alignment and installation of a tubing hanger within a subsea well system. A tubing hanger orientation assembly may be included with a rotary actuator that provides high torque adjustment and fine alignment of the tubing hanger with respect to other subsea equipment. At least one sensor may be included to measure and confirm an orientation of the tubing hanger for proper alignment and connection to a subsea wellhead.

The application discloses a blowout preventer suspension type pressure testing tool and method, which comprises a cup seal packer, a suspension body and a cup seal packer center body. The cup seal packer is sleeved on the outer wall of the cup seal packer center body and is located below the suspension body. The upper end of the cup seal packer center body is suspended on the suspension body, and the suspension body is provided with an axial pressure transmission channel. The application can make the pressure testing pressure and the weight of the pipe column all act on the suspension body, effectively change the force of the pipe column during the blowout preventer pressure testing, improve the construction safety, and improve the success rate and accuracy of the blowout preventer pressure testing.

The invention relates to the technical field of blowout preventer monitoring, in particular to an AI-based blowout preventer product performance monitoring system and method, and the system comprises a data collection module which is used for collecting the operation data of a blowout preventer and outputting a standardized multi-dimensional time sequence data stream; the feature extraction module is used for performing feature extraction on the standardized multi-dimensional time sequence data stream and outputting a multi-dimensional feature vector matrix; the state recognition module is used for constructing a state recognition model to recognize the current performance state of the blowout preventer according to the multi-dimensional feature vector matrix and generating probability distribution of the performance state; the trend prediction module is used for constructing a trend prediction model according to the performance state probability distribution and the historical state sequence, predicting the future performance degradation track and the remaining service life of the blowout preventer and generating a prediction result; the decision early warning module is used for constructing a multi-level early warning system according to the prediction result and generating a maintenance decision scheme; and the learning optimization module is used for continuously optimizing the AI model performance according to the decision scheme and the actual maintenance result feedback.

The invention relates to the technical field of oil and gas drilling and production well control safety, and discloses a hydraulic blowout preventer monitoring method and device and a storage medium. The method comprises the steps that hydraulic flow data in a hydraulic pipeline opening and / or closing process of a hydraulic blowout preventer are obtained, and whether the hydraulic flow data are normal or not is judged; based on the hydraulic flow data, whether the hydraulic blowout preventer completes closing or opening operation or not is judged, and whether closing or opening is normal or not is judged; when it is judged that the hydraulic blowout preventer completes the closing operation, air pressure data associated with an air path for controlling the drilling machine to brake are obtained; judging whether the air pressure data is lower than a safety threshold; and if the air pressure data is lower than the safety threshold value, a first alarm signal indicating brake failure is generated and output. According to the system, the well shut-in state and brake effectiveness can be verified, and an alarm can be given in time when safety interlocking is abnormally removed, so that the accident that a drilling tool is lifted and broken due to state misjudgment or human negligence is fundamentally eradicated, and the problem that the safety state cannot be monitored is solved.

The invention discloses a main machine for directional drilling construction, an angle adjusting device and an angle adjusting control method of the main machine. Comprising a feeding device, a middle angle adjusting device arranged below the rear portion of the feeding device, a front angle adjusting device arranged at the front end of the feeding device, a carriage device and a sliding centralizer which are arranged on the feeding device, a gyrator installed on the carriage device, a driving drill rod set in the gyrator, and a clamping shackle device arranged on the feeding device. The rod loading and unloading mechanical arm is arranged on the middle angle adjusting device; the orifice blowout prevention device is arranged at the front end of the clamping shackle device; the carriage device can drive the gyrator to move on the guide rail of the feeding device, and the gyrator and the driving drill rod set are coaxial with the clamping shackle device. The automatic directional drilling machine is suitable for underground coal mine automatic directional drilling machine construction, the drilling machine can achieve integral layout, and the structure is compact.

The utility model discloses an intelligent blowout prevention device based on a PLC control system, and relates to the technical field of blowout prevention during coal drilling, a slag baffle and an annular inner tube allowing a drill rod to penetrate through are arranged in a four-way pipe, the annular inner tube is connected with an external air source, a methane sensor used for detecting the concentration of methane near a drilled hole is arranged in a roadway, and the external air source is connected with an external air source. The PLC control cabinet is connected with the methane sensor and the external gas source, when hole spraying occurs, the pressure of gas in a drill hole is increased, the gas in the drill hole is diffused to the position near the drill hole through a gap between the drill rod and the four-way pipe, and after the concentration of the methane near the drill hole reaches a preset threshold value of the methane sensor, the PLC control cabinet controls the external gas source to supply gas to the annular inner tube. The annular inner tube expands towards the middle to tightly hold the drill rod, the path that gas in the drill hole continues to escape to the position near the drill hole through the gap between the drill rod and the four-way pipe is cut off, and the problem that normal work in a roadway is affected due to the fact that gas in the drill hole continues to escape through the gap between the drill rod and the four-way pipe is solved.

One form of this technology includes a sealing structure for sealing around the user's airway against the user's face. The sealing structure includes a sheet or membrane extending inward toward the user's airway and includes a structure that prevents the inner boundary of the sheet or membrane from being ejected outward due to internal pressure (e.g., folded back onto itself).

The invention belongs to the field of mechanical design, and relates to a rotary blowout preventer for a coal mine drilling machine. The core structure comprises a transition four-way joint which is provided with a deflation valve and a water drain valve which are respectively used for discharging gas and drilling slag and water; the rotary sealing device comprises a shell, a front end cover, a rear end cover, a rotary inner sleeve and a sealing rubber sleeve, the sealing rubber sleeve is in an inverted cone shape, self-sealing is achieved through the pressure of media returning out of a hole, and the holding force on the drill rod is enhanced. In addition, the device is further provided with an axial limiting structure, various sealing pieces, a nylon supporting ring, a lubricating nipple and other auxiliary components. In some embodiments, an auxiliary sealing ring is additionally arranged on the inner side of the large end of the sealing rubber sleeve, and double-sealing guarantee is formed. The device can effectively solve the problems that an existing coal mine drilling gas leakage-proof device is rapid in sealing abrasion, poor in high-pressure sealing performance and the like, and safe production of a coal mine is guaranteed.

The utility model relates to the technical field of drilling engineering, and particularly discloses a locking device of a flashboard blowout preventer, which comprises a hydraulic cylinder head, the hydraulic cylinder head is provided with an inner hole and an observation groove communicated with the inner hole, the hole wall of the inner hole is provided with at least two first locking petals protruding along the radial direction, and the first locking petals are distributed at intervals along the circumferential direction. A lock groove is formed in the middle of each first lock petal; the manual locking shaft is arranged in the inner hole in a penetrating manner; the locking shaft sleeve is arranged outside the manual locking shaft in a sleeving mode, and second locking petals corresponding to the first locking petals are arranged on the peripheral face of the locking shaft sleeve; the locking rod is used for being arranged in the observation groove in a penetrating mode and inserted into the locking hole so as to drive the locking shaft sleeve and the manual locking shaft to rotate around the axis, and therefore the second locking petal can rotate in the locking groove till the second locking petal is opposite to the first locking petal so as to be locked in the axial direction. The locking device of the flashboard blowout preventer is simple in structure, convenient to operate, safe and reliable, and is not easily locked due to corrosion and other reasons through matched locking of the first locking petal and the second locking petal.

The present application belongs to the technical field of petroleum engineering, and particularly relates to a broken rod blowout preventer wellhead sealing device. The device comprises a functional part, the upper side of the functional part is fixedly connected with a bottom shell, a packing is arranged in the bottom shell, the upper part of the bottom shell is threadedly connected with a top shell, the upper side of the top shell is threadedly connected with a blowout preventer shell, the bottom shell and the top shell are jointly sealed and slidably connected with a pressure applying part for extruding the packing, a first spring is fixedly connected between the pressure applying part and the top shell, and a detection assembly and a plugging assembly are arranged in the blowout preventer shell. The present application utilizes the phenomenon that the packing is rapidly compressed due to the loss of internal support caused by the light rod breakage, judges whether the light rod is broken, judges whether the wellhead needs to be plugged, and thus makes the blowout preventer device not need to be directly in contact with the light rod, avoids the wear between the blowout preventer device and the light rod, reduces the frequency of inspection and maintenance, slows down the wear speed of the light rod, and reduces the maintenance cost and workload.

The utility model relates to the technical field of oil extraction, in particular to a novel oil guide heating annular blowout preventer, which comprises an upper flange, a top cover, a spherical rubber core, a joint ring, a piston and a casing, a heating interface is arranged on the casing, the upper flange, the top cover, the spherical rubber core, the joint ring, the piston and the casing are sequentially arranged from top to bottom, the spherical rubber core is arranged in the top cover, and the joint ring is arranged in the casing. The spherical rubber core is extruded in the top cover through the piston, the upper flange is fixed on the top cover through a hexagon bolt, the top cover is fixed on the shell through a double-end bolt and a cap-shaped nut, a huge force shackle is arranged on the top cover, and a joint ring is arranged between the piston and the top cover. The heating connector is arranged on the shell and communicated with the annular groove, the inner sealing ring, the outer sealing ring, the inner abrasion-resistant ring and the outer abrasion-resistant ring are arranged on the piston, the abrasion-resistant ring and the sealing ring are arranged on the joint ring, the heating effect is further guaranteed, and it is guaranteed that hydraulic oil in the blowout preventer is in a working state.

The invention relates to the technical field of mining, in particular to a dual-purpose well control blowout prevention foundation pier for oil and gas wells, which comprises a foundation pier body, supporting bases are fixed at four corners of the bottom surface of the foundation pier body, a connecting plate is fixed on the bottom surface of the foundation pier body, and two hoop plates are mounted below two ends of the connecting plate. Two threaded rods are inserted into the two ends of the two hoop plates, the top ends of the threaded rods penetrate through the connecting plate, the top ends of the threaded rods are in threaded connection with threaded sleeves in a sleeving mode, the bottom ends of the threaded sleeves are fixed to the top face of the connecting plate, and a plurality of clamping blocks are inserted into the surfaces of the threaded sleeves; the device has the beneficial effects that the multiple clamping blocks are inserted into the surface of the screw sleeve, and the pushing rings are arranged to push the clamping blocks to clamp the screw rod. After the screw rod and the screw sleeve are screwed and locked, the push ring is screwed downwards, and the push ring pushes the clamping block to retract into the insertion hole along the inclined surface of the top surface of the clamping block, so that the rubber ring is tightly clamped on the surface of the screw rod by the clamping block, the friction force between the screw rod and the screw sleeve is increased, and the screw rod and the screw sleeve are effectively prevented from being loosened in the using process.

The application discloses a system and method for monitoring the operation state data of an ultra-high pressure blowout preventer control device, and relates to the technical field of well control in oil drilling and production. The application provides the following scheme: a large number of devices linked with the blowout preventer control device are comprehensively monitored under the ultra-high pressure working condition, and a monitoring system is designed to include multiple devices, multiple gateway nodes, multiple gateway subnodes and a cloud server. The devices are the devices linked with the blowout preventer control device for operation control. Each gateway node is previously associated with an edge network, the edge network is a local area network designed based on the components of the blowout preventer control device, and the edge network is designed to deploy multiple gateway subnodes in a tree structure. Each gateway subnode is an edge computing terminal carried by a remote console of the blowout preventer control device, and each gateway subnode is previously associated with at least one device. The monitoring system can upload the preprocessed data in each edge network to the cloud server.

The utility model relates to the technical field of gas control, in particular to a drilling blowout preventer for gas control, which comprises a single two-cavity pneumatic delay gas-water-slag separating device, one end of the outer surface of the single two-cavity pneumatic delay gas-water-slag separating device is fixedly connected with a fixing pipe, and one end of the fixing pipe is fixedly connected with a fixing flange. According to the drilling blowout preventer for gas control, due to the arrangement of the single two-cavity pneumatic time-delay gas-water-slag separation device, the fixing pipe, the connecting pipe, the positioning pipe and the air bag, when the drilling blowout preventer is used, the single two-cavity pneumatic time-delay gas-water-slag separation device can conduct two-stage separation on gas, water and slag, a two-cavity locking gas sealing chamber structure is adopted, and the gas-water-slag separation device can conduct two-stage separation on the gas, the water and the slag; a pneumatic delay valve element is used for acting according to a certain time period to alternately open and close water slag discharge port valves of the two cavities, gas, water and slag are automatically separated in the closed cavities, space body exchange in the extraction state is achieved, gas overflow is effectively eradicated, and gas alarm over-limit of the environment nearby drilling is prevented.

The blowout preventer crane comprises a main support, a center shaft is rotationally installed at the top of the main support, rear moving wheels are rotationally installed on the two sides of the main support, and a front fixing frame is fixedly installed at the front end of the main support. The center shaft is fixedly sleeved with a main gear, the top end of the center shaft is fixedly sleeved with an upper supporting frame, an upper supporting cantilever is fixedly installed on the top of the upper supporting frame, a winding motor is fixedly installed on the top of the upper supporting cantilever, an output shaft of the winding motor is fixedly sleeved with a winding wheel, and the winding wheel is sleeved with a winding cable. The blowout preventer crane for ocean engineering is simple in structure and convenient to use, a blowout preventer can be conveniently positioned and lifted, the blowout preventer crane is convenient to move, and the whole device is prevented from rolling over in the process of lifting the blowout preventer through the supporting anti-skid structures on the two sides.

The embodiment of the invention provides a distributed optical fiber acoustic logging depth correction method and device, equipment and a medium, and the method comprises the steps: analyzing a distributed optical fiber acoustic logging waterfall plot, and determining an optical fiber length range corresponding to the position of a blowout preventer; performing fast Fourier transform on the distributed optical fiber acoustic logging data within the optical fiber length range, and determining the bottom position of the blowout preventer; and performing logging depth correction on the distributed optical fiber acoustic logging curve according to the bottom position of the blowout preventer to obtain the corrected logging depth. In the embodiment of the invention, the optical fiber length range roughly corresponding to the position of the blowout preventer is determined by analyzing the distributed optical fiber acoustic logging waterfall plot, the specific position of the bottom of the blowout preventer is determined by using the fast Fourier transform of the distributed optical fiber acoustic logging data, and then logging depth correction is performed on the distributed optical fiber acoustic logging curve. The corrected logging depth is obtained, and the accurate logging depth is provided for a distributed optical fiber acoustic logging curve.

One form of this technology includes a sealing structure for sealing around the user's airway against the user's face. The sealing structure includes a sheet or membrane extending inward toward the user's airway and includes a structure that prevents the inner boundary of the sheet or membrane from being ejected outward due to internal pressure (e.g., folded back onto itself).

The invention discloses a vertical automatic connection and disassembly device for blowout prevention pipes, which comprises a base, a rotating mechanism is mounted on the base, a plurality of blowout prevention pipes to be butted are vertically mounted on the rotating mechanism, and a lifting connection mechanism for connecting the blowout prevention pipes is arranged on one side of the rotating mechanism; the lifting connecting mechanism comprises a lifting mechanism arranged on the base, a lifting mechanism is arranged on the side, making contact with the rotating mechanism, of the lifting mechanism, power tongs used for being in butt joint with the blowout prevention pipe are installed on the top of the lifting mechanism, and the power tongs are arranged at the upper end of the lifting mechanism. Automatic connection of the blowout prevention pipes is achieved, the blowout prevention pipes are connected step by step through hydraulic control, manual participation is not needed in the whole connection process of the blowout prevention pipes, manual labor is successfully replaced by the device to achieve full automation of connection of the blowout prevention pipes, manual labor is reduced, meanwhile, personal safety is protected, and production efficiency is improved. And the labor cost in the cable blowout preventer is also greatly reduced.

The utility model discloses a variable diameter blowout preventer pipe relates to wellhead sealing blowout preventer technical field, and its technical key points include main pipeline, the top of main pipeline installs first variable diameter pipe, the top of first variable diameter pipe installs second variable diameter pipe, the top of second variable diameter pipe installs the top pipe, the utility model discloses when using, realized through variable diameter pipe group and realized the passage diameter adaptation, and pressure sensor and blowout preventer valve guarantee safety, with the help of flange, U -shaped clamping plate and locking assembly, realize quick firm connection with least three bolts, trapezoidal positioning structure realizes pipeline accurate butt joint, and the overall operation efficiency, safety and convenience are improved.

The utility model discloses a movable dry-type blowout hole and overrun prevention device, which relates to the technical field of coal mine equipment and comprises a device main body, a shell is mounted in the device main body, an exhaust pipe is mounted at one end, far away from an air inlet end, of the shell, and an exhaust port is formed in the position, located at a port of the exhaust pipe, of the shell. An inner cavity of the exhaust port communicates with the exhaust pipe and an inner cavity of the shell, a gas inlet end is installed at the end, away from the exhaust pipe, of the shell, and a dust removal mechanism used for conducting preliminary dust removal and filtration on gas is arranged on the device body. According to the utility model, through the dust removal mechanism, gas carrying coal dust can be preliminarily and fully filtered, and the preliminarily filtered gas is conveyed to a subsequent device through the exhaust pipe, so that the preliminarily filtered gas can be secondarily filtered, and meanwhile, residual coal dust after filtration is conveniently collected and discharged; therefore, the gas preliminary filtering efficiency is further improved.

The utility model discloses an electric-drive hydraulic-control grease injection system for bridge-shot combined operation, which belongs to the technical field of oil-gas field development and comprises an electric control unit, and an electric-drive high-pressure grease injection unit, an electric-drive hydraulic control unit and a quick pressure test unit which are respectively connected with the software program electric control unit, the electric drive high-pressure grease injection unit is connected with the sealing grease box and used for pumping sealing grease out of the sealing grease box and feeding the sealing grease into the grease injection sealing head or the multi-wellhead blowout preventer. The electric drive hydraulic control unit is connected with the oil tank; the rapid pressure test unit is connected with the oil tank and is used for pressurizing the hydraulic oil and outputting the hydraulic oil to the multi-wellhead rapid pressure test nipple; the electric drive high-pressure grease injection unit, the electric drive hydraulic control unit and the rapid pressure test unit are arranged, the three units share one electric control unit, one grease injection system is integrated, high integration of one-dragging-three and one-dragging-two bridge shooting operation multiple systems is achieved, centralized control can be conducted, and therefore control with higher intelligence is achieved.