975 results about "Blowout preventer" patented technology

The invention discloses a blowout preventer remote automatic grease injection system based on PID control and a control method, and relates to the technical field of grease injection, and the control method comprises the following steps: an initialization stage: automatically matching the specification of a choke tube according to the diameter of a cable, and preheating sealing grease to a set temperature; in the dynamic control stage, wellhead pressure and grease injection pressure are monitored in real time, pressure errors are calculated, the flow of a grease injection pump is adjusted according to a PID algorithm, and when the cable lowering speed suddenly changes, pressure fluctuation is inhibited in advance through a differential link; and according to the safety redundancy mechanism, when the main PID controller fails, the standby PID controller is automatically switched, and emergency locking is triggered when the wellhead pressure exceeds the limit. The flow of a grease injection pump is adjusted in real time through an incremental PID algorithm and a self-adaptive adjustment method, the grease injection amount is accurately controlled, pressure fluctuation is reduced, sudden change of the cable lowering speed is predicted through a differential link, the response precision is improved, stable operation of the system is ensured through a redundant controller and an emergency locking function, PID output is corrected through a dynamic temperature-viscosity model, and the reliability of the system is improved. The system service life is prolonged.

The invention belongs to the field of petroleum engineering, and particularly relates to an ultra-high-temperature and high-pressure blowout preventer set and control system fault diagnosis method and system fusing a deep learning model and an expert knowledge model. The invention discloses an ultrahigh-temperature and high-pressure blowout preventer group and a control system fault diagnosis method. The method comprises three steps of sensor signal data acquisition, sensor signal data fault feature extraction and fault diagnosis reasoning model establishment. An intelligent fault diagnosis system for an ultrahigh-temperature and high-pressure blowout preventer group and a control system comprises an ultrahigh-temperature and high-pressure pressure supply system, an ultrahigh-temperature and high-pressure pilot gas source system, the ultrahigh-temperature and high-pressure blowout preventer group, an ultrahigh-temperature and high-pressure electric power control system, an ultrahigh-temperature and high-pressure sensor signal data acquisition system and a state monitoring and fault alarm system.

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.

The invention belongs to the field of petroleum and natural gas drilling engineering, and particularly relates to an ocean fine pressure control drilling inspection device and method. A wellhead monitoring device is used for monitoring locking information of a hoop of an annular blowout preventer; the drill floor monitoring device is used for monitoring the coupling information of the drilling tool; the gas cut monitoring device is used for monitoring gas cut information in the well pipe; the pressure monitoring and automatic control system state monitoring device is used for monitoring valve information of the wellhead device; and the remote control center is used for receiving information sent by the wellhead monitoring device, the drill floor monitoring device, the gas cut monitoring device and the pressure monitoring and automatic control system state monitoring device. According to the invention, state monitoring of different processes such as a drill floor surface, a well mouth, a gas cut state, pressure monitoring and an automatic control system is realized, information interaction with a fine pressure control well drilling control center can be realized, whole-process monitoring of an equipment operation process is guaranteed, safety of a fine pressure control well drilling operation process is guaranteed, and labor force is saved.

The invention relates to the technical field of blowout preventers, in particular to a shear ram blowout preventer which mainly comprises a shell, a first driving assembly and a second driving assembly which are installed on the two sides of the shell respectively, an upper shear ram and a lower shear ram which are installed at one ends of the two second driving assemblies respectively, a sealing mechanism arranged in the shell, and a protection mechanism arranged in the shell. And the protection mechanism is arranged below the upper shearing flashboard. When the drill rod is cut off by the lower cutting edge and the inclined cutting edge, the rough part at one end of the cut-off drill rod slides on the surface of the protection plate, and the cut-off drill rod is blocked by the protection plate, so that the rough part of the drill rod is not prone to being in contact with the first rubber part and the second rubber part, and the drill rod is prevented from being damaged. The sealing effect between the upper shearing flashboard and the lower shearing flashboard is guaranteed, oil gas is not prone to leakage, and the safety of the device is improved.

The blowout preventer hydraulic driver comprises a blowout preventer and a control system, first protective shells are fixedly arranged on the left side and the right side of the blowout preventer correspondingly, the other end of each first protective shell is in threaded connection with a first hydraulic cylinder, and a first piston is arranged in each first hydraulic cylinder; the other end of each first hydraulic cylinder is in threaded connection with a first valve cover, a second protective shell is welded to the other side of each first valve cover, a first locking rod is arranged in each second protective shell in a penetrating mode, and a balance rod is arranged at the end, close to the blowout preventer, of each first locking rod; the other end of each balance rod is in threaded connection with a first flashboard shaft, the other end of each first flashboard shaft is fixedly connected with a locking flashboard, a blind groove is formed in one side of each locking flashboard, and the problem that an existing blowout preventer is poor in driving sealing performance is solved.

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 a system for lowering and recovering a hydraulic pipe of an underwater blowout preventer, which comprises a winch drum, a driving assembly and a bearing seat are respectively arranged on shafts at two ends of the winch drum, the driving assembly is used for driving the winch drum to rotate, and the bearing seat is used for supporting the winch drum; a replaceable chain wheel and a hydraulic slip ring are sequentially mounted on the projecting shaft on the other side of the bearing seat, and the replaceable chain wheel is connected with a cable arrangement device through a chain; a hydraulic pipe of the underwater blowout preventer is led into the winch roller through the hydraulic sliding ring, then led to the cable arrangement device through the winch roller and finally led to the underwater blowout preventer through the cable arrangement device, and the cable arrangement device is used for enabling the hydraulic pipe to be arranged in order along the winch roller. The driving assembly is connected with a pneumatic control system which is used for controlling the driving assembly to drive the winch drum. According to the system, hydraulic pipes with different diameters can be automatically collected and released, the heat dissipation effect is good in the collecting and releasing process, and serious heating of the hydraulic pipes cannot be caused.

The double tension protection winch for the underwater blowout preventer comprises a rack, a roller is installed on the rack, a plurality of sets of tension devices are evenly distributed and fixed to one end of the roller, and a large gear ring is clamped by the other ends of the multiple sets of tension devices; a motor is fixed to the position, close to the large gear ring, of the rack, and a small gear is arranged on an output shaft of the motor and meshed with the large gear ring. Arc-shaped frames are welded to the positions, at the two ends of the roller, of the rack respectively, cable arrangement supports are fixed to the arc-shaped frames through bolts a, a lead screw is installed between the two cable arrangement supports in the axial direction of the roller, and a lead screw chain wheel is arranged on the lead screw; the rack is provided with a brake disc brake device close to the large gear ring; and the hydraulic control system is respectively connected with the motor, the tension device and the brake disc brake device. According to the double tension protection winch for the underwater blowout preventer, the tension device and the hydraulic control system are arranged for double tension protection, an umbilical cable is prevented from being snapped, the cable arrangement device is designed to be in a rotatable mode, and the universality of the winch is improved.

The invention relates to the technical field of well drilling well control processes, in particular to a well sealing perfecting and adjusting device and a pressure control well drilling empty and measuring working condition wellhead sealing method. The sealing device comprises a sealer and a rotary blowout preventer, the lower end of the sealer is connected with the rotary blowout preventer, the sealer and the rotary blowout preventer are sealed through a rotary blowout preventer sealing piece, and a rotary blowout preventer hoop hydraulic cylinder is installed on the side face of the upper end of the rotary blowout preventer. The sealer comprises a shell, a rubber core is arranged on the inner side of the upper portion of the shell, a sealer inner cavity is formed in the inner side of the rubber core, the lower portion of the rubber core is connected with a hydraulic cylinder mechanism, and the shell and the sealer inner cavity are sealed through a shell sealing piece. According to the sealing device for perfecting and adjusting the well and the wellhead sealing method for the pressure-controlled drilling empty and measuring working conditions, the technical defects of a pressure-controlled drilling technology under the empty and measuring working conditions can be overcome, the pressure-controlled technology under the empty and measuring working conditions can be further achieved, and the drilling cost is saved.

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.

The present application relates to a pressure-operating machine and a conversion method that can be converted between the Additive and American installation modes, belonging to the technical field of pressure-operating machines, including a pressure-operating machine, the pressure-operating machine includes a bracket assembly, a lifting part, a slip device, a well control part, and a hydraulic control part. The slip device includes a fixed slip group and a movable slip group. The fixed slip group includes a movable anti-top slip, a fixed anti-top slip, a fixed load-bearing slip and an active turntable. The active turntable includes a turntable and an upper seat ring, and the movable slip group is connected to the turntable; the well control part includes an annular blowout preventer and a working blowout preventer, and the annular blowout preventer is connected to the fixed load-bearing slip, including a righting column, which is used to be installed between the movable anti-top slip and the lower load-bearing plate, and the fixed anti-top slip is arranged below the lower load-bearing plate to convert from a pressure-operating machine to an American pressure-operating machine. The present application has the effect of reducing the investment cost of oil production equipment.

The present application discloses a mud blowout preventer box for pressure operation equipment, which relates to the technical field of drilling blowout prevention equipment. It includes a box body, a gland and a bottom plate. A central hole for the drill pipe to pass through is provided on the box body. A discharge port is provided on the side wall of the box body. A first sealing pressure ring is provided at the top of the box body, and a second sealing pressure ring is provided at the bottom of the box body. Both the first sealing pressure ring and the second sealing pressure ring are made of elastic materials. The gland is installed on the top of the box body and is used to squeeze the first sealing pressure ring. A first through hole for communicating with the central hole is provided on the gland. The bottom plate is installed at the bottom of the box body and is used to squeeze the second sealing pressure ring. A second through hole for communicating with the central hole is provided on the bottom plate. Fixing structures for fixing the gland and the bottom plate are respectively provided on the box body. The present application has the effect of effectively preventing the mud in the drill pipe from spraying out during the uncoupling process, and avoiding polluting the drill floor and the surrounding environment.

The invention discloses an underwater blowout preventer myriameter photoelectric composite cable lowering and recycling system which comprises an integrated frame, a cable storage winch is connected to one side of the bottom of the integrated frame, a cable arrangement device is further connected to the bottom of the integrated frame, the cable arrangement device is arranged close to the cable storage winch, and a second guide pulley and a compensator are further connected to the bottom of the integrated frame. The middle of the integrated frame is connected with a traction winch, one side of the traction winch is connected with a first guide pulley, the cable storage winch is connected with an umbilical cable, and the umbilical cable sequentially penetrates through the cable arrangement device, the second guide pulley, the compensator, the first guide pulley and the traction winch. Double-closed-loop control is adopted, the problems that distance cable arrangement dislocation is caused by accumulative errors of PLC control synchronous cable arrangement and umbilical cables and underwater blowout preventers cannot be normally recycled and put down due to faults of a single sensor are solved, self-adaptive cable arrangement and real-time correction are conducted in a mechanical mode, accurate cable arrangement is achieved, and the working efficiency is improved. Compared with an angle sensor, the structure is simple and no accumulative error exists.

The invention discloses a blowout preventer sea test effect evaluation method based on game theory combination weighting and fuzzy evaluation, belongs to the technical field of effect evaluation, is used for blowout preventer sea test effect evaluation, and comprises the following steps: constructing a blowout preventer sea test effect evaluation model, performing subjective weight calculation through a triangular fuzzy analytic hierarchy process subjective weighting method, and calculating the evaluation result of the blowout preventer sea test effect. Objective weight calculation is carried out through a CRITIC objective weighting method, game theory subjective and objective combination weighting is carried out, fuzzy comprehensive evaluation is carried out on game theory subjective and objective combination weighting results, and a blowout preventer sea test effect evaluation result is obtained. The method has guiding significance for sea test data acquisition of the blowout preventer group and the control system thereof and scientific evaluation of the performance of the blowout preventer group and the control system thereof, and the evaluation result can provide a reference basis for optimization and improvement of the blowout preventer group and the control system thereof after the sea test.

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 relates to the technical field of petroleum engineering, and provides a shearing and sealing integrated well repair blowout preventer which comprises a shell 6, a shearing flashboard 7 and a flashboard feeding mechanism used for driving the shearing flashboard 7, the shell 6 is in a hollow cross shape, and a sucker rod passes through the drift diameter of the upper side and the drift diameter of the lower side of the cross. A pair of coupled shear flashboards 7 is symmetrically arranged in the left drift diameter and the right drift diameter respectively and comprises an upper shear flashboard 71 and a lower shear flashboard 72 which are coupled, sheared and bent, and the upper shear flashboard 71 and the lower shear flashboard 72 are driven by a flashboard feeding mechanism to shear and bend a sucker rod inwards in a left-right V shape, so that well shut-in and flow control are achieved. The bending groove design is introduced into the shearing flashboard structure, the flashboard can bend an oil pipe while shearing the oil pipe, blowout high-pressure fluid in a pipe column is preliminarily controlled, and the water hammer impact and flow-induced vibration phenomena are effectively relieved; the flow guide mechanism balances the pressure of the upper part and the lower part in the vertical drift diameter, and the well opening difficulty is reduced.

The invention relates to the technical field of blowout preventers, and discloses a hydraulic blowout preventer state monitoring and alarming method based on a flashboard position sensor. The method comprises the steps that S1, at least one position sensor is installed at a flashboard piston pin shaft of the hydraulic blowout preventer and used for detecting the opening and closing state of a flashboard; s2, collecting a signal of the position sensor, and transmitting the signal to a programmable logic controller (PLC) control system for data processing; and S3, the on-off state of the blowout preventer is judged according to signals of the position sensor. A position sensor is adopted to monitor the gate switch state in real time, a PLC control system is combined for data analysis, and high-precision state judgment is achieved. Different from a traditional scheme which only depends on hydraulic pressure feedback or visual inspection of an operator, the device can comprehensively sense the opening and closing conditions of the flashboard, so that misjudgment or missed judgment caused by visual errors, pressure abnormity or signal lag is avoided, and the safety and reliability of the blowout preventer are improved.

The invention provides a blowout preventer and a rubber core sealing adjusting method, and belongs to the technical field of drilling equipment. The blowout preventer comprises an upper shell and a lower shell connected with the upper shell, the self-aligning blowout preventer further comprises a self-aligning assembly, and the self-aligning assembly is installed between the upper shell and the lower shell and is positioned and fixed through the upper shell and the lower shell; the self-aligning assembly comprises a first shell, a rubber core, an upper aligning unit and a lower aligning unit, the first shell is fixedly arranged between the upper shell and the lower shell, the rubber core is arranged in the first shell and makes contact with the upper aligning unit and the lower aligning unit which are installed in the first shell, and the upper aligning unit is used for adjusting the position between the upper portion of the rubber core and the drill rod. The technical problem that in the prior art, in the dynamic well drilling process of a drill column, due to heterogeneity of stratum lithology, the drill column generates high-frequency vibration, so that sealing deviation of a rubber core of the rotary blowout preventer and a drill rod causes sealing failure can be effectively solved.

The invention relates to the technical field of well drilling auxiliary tools, in particular to a rotary blowout preventer delivering and taking tool which comprises a center rod, an outer shell, an elastic component and a guide limiting groove. One end of the center rod is in butt joint with a rubber core connecting disc of the rotary sealing assembly; one end of the outer shell is rotationally arranged on the center rod in a sleeving manner, and a plurality of limiting pins are arranged at the other end of the outer shell in the circumferential direction; the elastic part is arranged in the outer shell and axially abuts against the center rod and the rubber core connecting disc; the limiting pin enters the guide limiting groove from the inlet through axial pressure, is limited and reversed in the guide limiting groove through the reversing limiting structure and is moved out of the outlet. When the rotary sealing assembly is put in and taken out, the tool and the rotary sealing assembly can be installed together through rotation of the outer shell, the tool and the rotary sealing assembly can be separated without rotating a center rod to find the position or shearing a limiting pin, residues do not exist in a well, and the safety performance is improved.

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 relates to the field of offshore oilfield development, and discloses an offshore drilling well control automation simulation system and an operation debugging method thereof.The offshore drilling well control automation simulation system is characterized in that an upper computer is connected with a PLC control box through an optical fiber, and a controller transmits a control signal to the PLC control box through the optical fiber; the PLC control box transmits information of the sensors arranged at the key connection points to the controller through optical fibers; the throttle manifold and control device is connected with the PLC control box through an optical fiber to simulate fluid flowing out of the annulus to generate a throttling effect; the blowout preventer group and the control device are connected with the PLC control box through a cable; the liquid circulation simulation device is connected with the PLC control box through a cable and simulates liquid circulation during well drilling. The gas invasion annulus simulation device is connected with the PLC control box through a cable and simulates gas invasion annulus during well drilling; the simulation top drive and the simulation winch are connected with the PLC control box through cables until the simulation drill column is located at a preset position. According to the invention, manual misoperation probability and manual operation time can be reduced, and offshore drilling well control efficiency can be improved.

The utility model relates to a blowout preventer flashboard rubber core dismounting device, and belongs to the technical field of oil field equipment maintenance. The blowout preventer flashboard rubber core dismounting device comprises a drawing hook, a drawing mechanism and a supporting frame, wherein the drawing mechanism is used for applying tensile force to the drawing hook, the supporting frame is used for being supported on the sealing end face of a flashboard body and providing tensile reaction force for the drawing mechanism when the drawing mechanism applies the tensile force to the drawing hook, and a rubber core avoiding space is formed in the supporting frame. The drawing hook comprises a hook arm connected with the drawing mechanism and a wedge-shaped hook tip which is arranged at one end of the hook arm and used for being wedged into a gap between the gate plate body and the rubber core and hooking the rubber core. The number of the drawing hooks is at least two, and the drawing hooks are used for hooking the rubber core from the two ends of the rubber core installation groove in the flashboard body respectively when the blowout preventer flashboard rubber core dismounting device is used. In the working process of the blowout preventer flashboard rubber core disassembling device, only the flashboard body needs to provide a supporting face, and the blowout preventer flashboard rubber core disassembling device is suitable for separation of various types of blowout preventer flashboard bodies and rubber cores.

The invention belongs to the technical field of petroleum and natural gas drilling engineering, and discloses a device and method for testing wellbore pressure during simulated gas cut shut-in, and the device comprises a gas-liquid conveying and backflow system, a wellbore simulation system and a control and data acquisition system; the shaft simulation system comprises a simulation drill string, a simulation sleeve and an electric flat valve; the gas-liquid conveying and backflow system comprises a liquid injection pipeline, a liquid conveying pump, a liquid inlet pipeline, a liquid storage tank, a liquid return pipeline, a gas-liquid separator, an exhaust pipeline, a suction pump, a liquid discharge pipeline, a gas return pipeline, a nitrogen compressor, a gas injection electromagnetic valve and a gas injection pipeline; the control and data acquisition system comprises a control cabinet and a data acquisition unit. According to the invention, the pressure change of the shaft under different factors during the gas cut shut-in period can be effectively simulated, the pressure data is restored through the similarity principle, the pressure data is compared with the actual pressure grade of the wellhead blowout preventer, the maximum internal pressure resistance strength of the casing and the formation fracture pressure, and the safety and reliability of overflow shut-in are evaluated.

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.

The utility model relates to a valve body fixing assembly for a blowout preventer control device, which belongs to the field of blowout preventers and comprises a valve body, a fixing box is arranged on the lower side of the valve body, and fixing mechanisms used for fixing the valve body are arranged at the left end and the right end between the opposite sides of the inner top wall and the inner bottom wall of the fixing box. The left side and the right side of the bottom of the valve body are each provided with a clamping mechanism used for clamping the valve body. The fixing mechanism comprises connecting plates fixed to the left end and the right end between the opposite sides of the inner top wall and the inner bottom wall of the fixing box. According to the valve body fixing assembly for the blowout preventer control device, a valve body is placed on the fixing box, the valve body is located on the opposite sides of the two clamping mechanisms, then a limiting plate is limited through the fixing mechanism, and then the fixing mechanism is matched with the clamping mechanisms, so that the bottom of the valve body can be clamped and fixed; and therefore, the valve body can be prevented from shaking, a worker can conveniently fix the valve body, and the practicability is improved.