472 results about "Workover" patented technology

The invention relates to the technical field of electric workover rig thermal management, and discloses a workover pump truck electric drive thermal management method and system, and the system comprises a multi-source temperature collection module, an operation state monitoring module, a thermal management analysis module, a strategy matching engine module, a dynamic execution control module, a feedback optimization module, and a prediction decision module. The method comprises the following steps: acquiring environment temperature, motor temperature, battery temperature and cooling liquid temperature data; obtaining motor power, battery current and a vehicle operation mode; generating a thermal management demand level based on the temperature and the operating parameters; matching natural cooling, air cooling or liquid cooling strategies according to grades; cooling operation is executed, the temperature change rate is calculated in real time, and the cooling intensity is dynamically adjusted; when the threshold value is exceeded, liquid cooling cooperative control is started; predicting a thermal load trend through an LSTM model, generating a dynamic cooling plan, and optimizing an execution priority; and a thermal management efficiency evaluation report is output, so that the operation reliability and energy efficiency of the electrically-driven workover pump truck are improved.

Disclosed is an electric elevator clamp for well workover, which clamp relates to the technical field of well control and blowout prevention. The electric elevator clamp comprises an elevator clamp body (1), a clamp leaf (2), a movable leaf (3), electric push rods (4), a lifting arm (5), a lifting ring (6) and an overturning mechanism, wherein a vertically-penetrating mounting hole is provided in the upper end of the elevator clamp body (1), and a vertically-penetrating notch, the rear portion of which is in communication with the mounting hole, is provided in the upper side of the front portion of the elevator clamp body (1); and after push rods of the two electric push rods (4) are extended, the movable leaf (3) and the clamp leaf (2) are engaged together, and the movable leaf (3), the clamp leaf (2) and the elevator clamp body (1) jointly clamp an oil pipe. By providing the electric push rods (4), traditional hydraulic drive is changed, the laying of a hydraulic pipeline is simplified, and the problem of hydraulic oil leakage is avoided; and the phenomenon in which hydraulic oil has increased viscosity due to the low temperature in winter, resulting in poor fluidity and slow and sluggish actions can be avoided. By providing the overturning mechanism, the upper end of the elevator clamp body (1) can be driven to turn-over back and forth, which facilitates the grasping of the oil pipe on an oil pipe rack; and the electric elevator clamp has the advantages of being safe, labor-saving, simple and efficient.

The invention relates to the technical field of oil field workover treatment, in particular to a rapid blowout wrecking device and method for minor repair operation. According to the technical scheme, a lifting mechanism is installed on workover treatment equipment through a fixing mechanism, a rotary speed reducer is installed at the upper end of the lifting mechanism, a blowout wrecking rotating arm is installed on the upper portion of the rotary speed reducer, the outer end of the blowout wrecking rotating arm is fixedly connected with a fixing base, a turbine is installed in the fixing base, and a rotating short section is installed in the center of the turbine. The lower end of the rotary short section is movably connected with a full-bore plug valve; the worm is installed on one side of the turbine, the worm is driven by the hydraulic cycloid motor to rotate, the worm drives the turbine and the rotary short section to rotate, then the full-bore plug valve is driven to be rotationally connected to an oil pipe of a wellhead, then the switch knob is closed, and blowout wrecking is completed. The full-bore plug valve is installed through mechanical rotation, the follow-up loading function is achieved, potential safety hazards caused by manual installation of the full-bore plug valve are avoided, and rapid blowout wrecking work of blowout is achieved.

The invention discloses an automatic oil pipe feeding and positioning system and an integrated workover rig, and mainly relates to the field of workover equipment. Comprising a second-order feeding module, the second-order feeding module comprises a supporting stand column with a lifting stroke, a supporting rod with a lifting stroke is installed on the supporting stand column, a groove frame horizontally extending in the length direction of the well repair vehicle is arranged at the top end of the supporting stand column, and the groove frame has a horizontal follow-up stroke in the length direction of the groove frame; the hoisting module comprises a mast stand column installed on one side of the derrick, and an elevator mechanism with a lifting stroke is installed on the mast stand column; the wellhead positioning module comprises a strip-shaped frame mounted on one side of the derrick, a large-arm truss with a rotating stroke is mounted on the strip-shaped frame in a liftable manner, a small-arm truss is rotatably mounted on one side of the large-arm truss, and a mechanical gripper is mounted on the small-arm truss. The oil pipe feeding and positioning device has the beneficial effects that the structure is simple, vehicle-mounted installation and use are achieved, actions of all links are tightly and smoothly linked, and oil pipe feeding and positioning in automatic workover operation can be completed.

An apparatus and method for measuring position and magnitude of downhole mechanical friction. The apparatus comprises sensors that reside along, or in-line with, a section of equipment that is installed or removed from a wellbore. The sensing device is configured to measure friction relative to the wellbore during a work-over or other well intervention procedures where said section of equipment (tubing, rods, cable / wireline, etc.) is installed in, or removed from, the wellbore. Recorded measurements are processed to correct for dynamic forces to provide a measure of friction through the wellbore. Additionally, a method for applying the map of wellbore friction to the design and analysis of a rod actuated pump is presented. The method and apparatus presented herein pertain specifically to the handling of continuous rod, continuous tubing, or wireline / cable passing through the wellbore as measured at surface.

The utility model discloses a space-adjustable vehicle-mounted workover rig operation room, which comprises an operation room, a vehicle-mounted workover rig, a vehicle-mounted workover rig and a vehicle-mounted workover rig, an operation table and a seat are sequentially arranged on one side in the fixed bin, an opening matched with the expansion bin is formed in the opposite side, a seat guide rail is arranged at the inner bottom of the fixed bin, and the seat can slide along the seat guide rail so as to be close to or away from the operation table; the expansion bin is arranged at the opening of the fixed bin in a sliding manner; the driving device is arranged in the operation chamber and used for driving the expansion bin to stretch out of the fixed bin or completely retract into the fixed bin relative to the fixed bin; and one end of the bracket is rotationally connected with a vehicle tail seat of the vehicle-mounted workover rig through a first rotating oil cylinder, and the other end of the bracket is rotationally connected with the bottom of the fixed bin through a second rotating oil cylinder. According to the utility model, the transportation size requirement is met, and the operation comfort and safety of the driller room under the working condition are improved.

The invention discloses an electric control system of an electric workover rig, which comprises a control module, a driving module, an execution module, a data acquisition module and a monitoring module, and is characterized in that the control module is used for controlling the starting, stopping, up-down moving and rotating actions of the workover rig through a PLC, the driving module comprises a variable-frequency inverter and a bidirectional DC / DC converter, the variable-frequency inverter is used for driving a motor load to operate, and the bidirectional DC / DC converter is used for controlling the motor load to operate. The bidirectional DC / DC converter is used for carrying out charging and discharging management on the energy storage battery, and the execution module is used for completing the control action of the workover rig according to an instruction sent by the control module. According to the invention, the visual monitoring module, the fault detection and alarm module and the multi-modal data fusion analysis module are matched, and real-time data acquisition and image capture are carried out on key parts of the electric control system, so that real-time safety monitoring is carried out on the key parts; and key parts are monitored in real time, and the use condition can be checked at any time, so that the use safety of the electric workover rig is improved.

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 utility model relates to the technical field of workover rigs, in particular to an electrically-driven automatic workover rig which comprises a workover rig body, a lifting assembly is installed on one side of the workover rig body, and handrails are arranged on the two sides of the lifting assembly. The lifting assembly comprises a fixing plate, a lead screw penetrates through the interior of the fixing plate, a servo motor is installed above the lead screw, the outer wall of the lead screw is connected with a nut pair, a guide block is fixedly installed on the outer wall of the nut pair, one end of the guide block is fixedly connected with a pedal, and the other end of the guide block is fixedly connected with a lifting assembly. A guide rod penetrates through the end, away from the fixing plate, of the pedal. According to the workover rig, due to the arrangement of the lifting assembly, a worker does not need to climb actively, the possibility that the worker slips down is reduced, due to the arrangement of the auxiliary assembly, the worker can step on the rotating plate to enter a driller control room, the rotating plate is attached to the vertical plate, the possibility that oil stains appear on the surface of the rotating plate is reduced, and the safety of structural use is improved.

The invention discloses an intelligent unmanned remote control system and method for an oil field electric workover rig, and relates to the field of remote control of the oil field electric workover rig, and the system comprises a full-dimension sensing network construction module, a digital twin driving cognition module, an edge intelligent decision module, and a man-machine co-fusion interaction module. According to the intelligent unmanned remote control system and method for the electric workover rig in the oil field, a three-level decision-making tree designed by dynamic priority task scheduling sets extremely short response time for different level requirements of emergency braking, working condition adjustment and parameter optimization, various sudden and conventional operation change conditions can be rapidly dealt with, and the operation efficiency is improved. By establishing a comprehensive multi-objective optimization function, energy consumption, operation time and risk indexes can be comprehensively considered, weight coefficients can be flexibly adjusted according to different operation scenes and user requirements, and equipment operation parameters and operation process control schemes which meet multi-objective optimization and conform to equipment and operation safety and performance constraint conditions can be accurately searched.

The invention relates to the technical field of petroleum drilling and workover treatment, in particular to a petroleum drilling and workover rig pipe tool operation method. The pushing and supporting robot is arranged between the wellhead of the drill floor surface and the power catwalk, and is matched with equipment such as a traveling and hoisting system and an iron roughneck to execute the steps of transferring, screwing, lowering and the like of pipes, so that the single pushing and supporting robot can simultaneously cover the transferring of the pipes from the catwalk to the wellhead and a rat hole and the transferring of the pipes from a racking platform to the wellhead, and a special drill floor pipe racking machine does not need to be additionally arranged; and furthermore, the operation method is suitable for various working conditions, and collaborative operation is simple and convenient.

The invention discloses electric-drive automatic workover operation equipment for a vertical derrick. The electric-drive automatic workover operation equipment comprises a self-propelled chassis, the vertical self-balancing derrick, a traveling block guide rail, a traveling block, an electric winch, a wellhead automatic platform and a hydraulic pipe conveying machine. The self-propelled chassis is installed at the bottom of the main vehicle and provided with four stepping supporting legs, and a stepping device is arranged below each stepping supporting leg. A balance beam type crown block is mounted at the top end of the upright self-balancing derrick; the traveling block guide rail is arranged along the front side of the upright self-balancing derrick; the traveling block moves up and down along the traveling block guide rail; the wellhead automatic platform is integrated with a hydraulic clamp, a righting manipulator and an automatic hoop finder; the hydraulic pipe conveying machine adopts a horizontal-to-vertical bidirectional lifting mechanism, the vertical self-balancing derrick is configured, a loaded crown block is small in offset, the derrick is configured with a traveling block guide rail, a traveling block moves along with the guide rail and is small in wind load drift, the wellhead pipe column handover processing efficiency is high, and the time for a traveling crane system of the workover rig to participate in pipe column handover is shorter; and the overall efficiency of the automatic tubular column processing operation of the workover rig is improved.

The invention provides a cement consolidation casing pipe separation process, and relates to the technical field of petroleum engineering well repair, the process comprises the following steps: S1, ground equipment installation, pipeline connection and pressure test; s2, plugging a central through hole of the casing below the target depth, and performing a pressurizing test; s3, the inner wall of the casing pipe is cleaned, the well is washed circularly, gas lift drainage and drying are conducted, and inert gas is injected for well sealing; s4, detecting the contents of combustible gas, oxygen and inert gas in the well; s5, a high-frequency induction heating device is put down to the target depth, and the high-frequency induction heating device is moved from bottom to top to conduct induction heating on the sleeve; s6, a section milling tool is put down to conduct section milling on the casing pipe at the target depth, and the well is washed circularly; and S7, a fishing tool is put down, and the upper casing pipe is lifted out. The device can effectively destroy the binding force between the casing and set cement outside the casing, then the casing can be taken out in sections, and the device has the advantages of being high in efficiency, short in operation period, low in cost, small in environmental pollution and the like.

A visual workover operation method and an operation device. The method comprises the following steps: lowering; anchoring; catching: a fishing structure of a downhole tool string moving forwards to catch a fish, specifically, monitoring pressure information of the fishing structure, and, on the basis of the pressure information, determining whether the fishing structure has caught the fish; sticking releasing: the fishing structure of the downhole tool string moving backwards to fish up the fish, specifically, monitoring tension information of the fishing structure, and, on the basis of the tension information, determining whether the fishing structure has fished up the fish; and unanchoring: separating an anchoring sub from a wellbore wall for unanchoring, specifically, monitoring anchoring pressure information within the anchoring sub, and, on the basis of the anchoring pressure information, determining an anchoring state of the anchoring sub; monitoring angular displacement information and travel displacement information of a rotating shaft of a motor; and, on the basis of the angular displacement information, the travel displacement information and the anchoring state, determining an operational state of the downhole tool string.

The invention belongs to the technical field of oil field well repair equipment, and particularly relates to a pipe and rod two-in-one well repair device which comprises a rack, a large clamp mechanism and a centering mechanism are arranged on the rack, and the centering mechanism is arranged on one side of the large clamp mechanism; the large tong mechanism comprises a main tong, a back-up tong and a driving mechanism, the main tong is arranged over the back-up tong, the main tong and the back-up tong are each provided with two oppositely-arranged clamping blocks, the clamping blocks are each provided with a chuck, the chucks are arranged on the clamping blocks in a replaceable mode, the chucks comprise an oil pipe chuck and an oil rod chuck, and the driving mechanism is used for driving the main tong to do lifting motion. The clamping component is divided into the clamping block and the detachable clamping head, the centering component is divided into the centering shell and the detachable centering plate, when an oil pipe or an oil rod is operated, only the corresponding clamping head and the corresponding centering plate need to be replaced, work can be conducted, and compared with replacement of the whole module, the work efficiency is improved; and the centering mechanism and the tong mechanism are integrated on the rack, so that the operation convenience is improved.

The invention relates to the technical field of digital twinning, in particular to a drilling and workover equipment digital twinning monitoring system which comprises a deposition path reconstruction module, a trend section recognition module, a differential pressure offset positioning module, an oscillation linkage analysis module and a joint control sequence generation module. According to the method, the corresponding relation between a rock debris return path and a drilling depth time sequence is constructed, particle radial deformation and liquid flow channel positioning information are fused, a space mapping map of a deposition track is formed, a continuous evolution section is extracted and a trend distribution set is constructed in combination with the drilling speed amplitude variation trend of a track dense section, and the drilling speed of the track dense section is obtained. The method comprises the following steps: identifying an interlayer abnormal point location based on pressure sequence difference amplitude comparison change, further superimposing a consistency relationship between a drilling tool oscillation amplitude and a drilling speed change direction, screening a linkage feature group with relevance, extracting a key node according to a trigger frequency and an amplitude variation concentration ratio, generating a corresponding operation instruction, and storing the operation instruction. And driving multi-parameter collaborative identification and intelligent generation of a drilling and workover control path.

The invention relates to the technical field of workover rigs, and discloses an electric drive energy storage workover rig which comprises a workover rig body, two sliding rods are fixedly connected to the left side of the workover rig body, a centering disc capable of being lifted up and down is slidably connected between the sliding rods in a sleeved mode, a rotating ring is rotatably connected to the inner wall of the centering disc, and a sliding frame is fixedly connected into the rotating ring. A centering frame is clamped in the middle of the sliding frame in a sliding mode, and a hanging head is spherically hinged to the bottom of the centering frame. The centering frame is used for driving the half clamping pipe to correct the deviation between the half clamping pipe and the center position of a well hole, during moving positioning, the initial half clamping pipe and the well hole are allowed to have large dislocation, the seating positioning difficulty of the derrick is greatly reduced, the two centering sleeves and the cam rod are used in cooperation to conduct fine adjustment centering on the half clamping pipe and the well hole, centering is convenient and fast, the precision is high, and the centering precision is high. The swinging direction of the hanging head is limited through the U-shaped guide plate in a matched mode, the two half clamping pipes are used for vertically and movably taking the pipes in a clamping mode, and therefore the pipe taking accuracy and efficiency are improved.

The invention belongs to the technical field of oilfield chemistry, and particularly relates to a viscosity-reducing paraffin inhibitor for oilfield oil well production and a preparation method of the viscosity-reducing paraffin inhibitor. Comprising the following components in percentage by mass: 15.08%-17.92% of maleic anhydride, 18.01%-26.88% of nonylphenol polyoxyethylene ether, 23.2%-25.4% of a benzylamine solution, 3.97%-5.0% of a 5% ferrous sulfate aqueous solution, 3.97%-5.00% of a 5% ammonium persulfate aqueous solution and 15.87%-17.19% of a sodium hydroxide aqueous solution. The viscosity-reducing paraffin inhibitor solves the problems that the density and viscosity of crude oil are increased in the later stage of development of most oil wells in oil fields, paraffin precipitation is serious, the repair-free period is short, and the effect of the existing paraffin inhibitor becomes poor year by year, prolongs the repair-free period of the oil wells, can effectively relieve frequent well repair caused by paraffin precipitation in production of the oil wells in the oil fields, does not contain chlorine, and is environment-friendly. The paraffin control and viscosity reduction effects are considered, and meanwhile, the influence on downstream refining equipment is avoided.

The utility model relates to the field of salvaging devices, in particular to a directional well salvaging device. The device comprises a mounting shell, a pair of fixing shafts is arranged in the mounting shell, an anti-falling assembly is movably arranged on the two fixing shafts, a transmission assembly is further movably arranged in the mounting shell, and the anti-falling assembly is in transmission connection with the transmission assembly. The problem that in the oil-water well workover operation, some metal sundries often appear in a shaft, and if the metal sundries are not salvaged in time, workover equipment is possibly damaged is solved. And the transmission assembly is arranged to be matched with the anti-falling assembly, so that the adsorbed metal fragments can be covered, the situation that when the device is recycled, the metal fragments adsorbed by a strong magnet collide with the inner wall of a hoistway and fall off is effectively prevented, and the fishing effect is improved. And by arranging the storage disc at the top of the mounting shell, sundries floating on the surface of the liquid in the well can be fished and recycled, and the fishing effect is better.

The utility model relates to the technical field of workover equipment, in particular to an intelligent environment-friendly oil pipe and sucker rod transporting and storing device for workover operation. Comprising a base, side baffles are fixed to the left side and the right side of the base, door plates are hinged to the front side and the rear side of the base, a bridge assembly is fixed to the base, a plurality of storage spaces are formed in the bridge assembly in the vertical direction, pushing devices are arranged on the door plates, and lifting assemblies are arranged on the portions, on the front side and the rear side of the bridge assembly, of the base. The pushing assembly can push the oil pipe or the oil pumping pipe into the lifting assembly on one side of the pushing assembly, and the lifting assembly can lift the oil pumping pipe or the oil pumping rod in the lifting assembly and transfer the oil pipe or the oil pumping rod into the storage space. According to the device, the pushing assembly is arranged, the pushing assembly can push the oil pipe or the sucker rod into the lifting assembly in sequence, the lifting assembly can lift the oil pipe or the sucker rod and convey the oil pipe or the sucker rod into the storage space, and the labor intensity of workers can be reduced in the oil pipe or sucker rod storage process.

The utility model relates to the field of oil field minor repair operation equipment, and discloses a minor repair operation automatic rotation drilling device and a workover rig for oil field workover operation automation, the device comprises a double-arm lifting ring, a side swing oil cylinder, a frame, a single-arm lifting ring, a turnover oil cylinder, a power elevator and a bearing sealing mechanism; the bearing sealing mechanism comprises a suspension nut, a bearing connecting assembly, a bearing sealing rotating assembly and a guiding piece which are sequentially connected from top to bottom. The bearing and connecting assembly comprises a faucet suspension, a faucet bearing component, a protective sleeve and a faucet lower connecting piece. The bearing sealing rotating assembly comprises an outer frame, a bearing sealing block, a left hydraulic cylinder and a right hydraulic cylinder. Through reasonable design of the whole set of device, unmanned special operation procedures such as sand washing, plug drilling and milling are realized; reliable and quick connection of the pipe column is realized by adopting relative rotation of a split type hydraulic oil channel and an embracing sealing type sealing bearing technology.

The present application relates to a kind of telescopic printing lead device for horizontal well, relate to oil well workover technology equipment field, for solving the problem of construction difficulty caused by printing lead device matched with logging technology use, higher cost, longer construction time.Problems include: connecting barrel assembly, one end is connected with upper delivery string, the other end of connecting barrel assembly is provided with sliding cavity;Printing lead module, along the first direction telescopic setting in sliding cavity;Extrusion piece, movably arranged in sliding cavity, and located between printing lead module and the bottom of sliding cavity;Limiting structure, between connecting barrel assembly and printing lead module, for preventing printing lead module from sliding out of sliding cavity.The device in the present application is pulled out to ground, and the specific production orientation of the first lead print in the wellbore can be found by using the second lead print as reference point.In this way, the type and size of the falling object, the degree of wellbore deformation and the orientation of the wellbore can be accurately judged when lowering into horizontal section.

The application discloses a telescopic automatic hydraulic tong control system and a control method thereof. The telescopic automatic hydraulic tong control system comprises an automatic hydraulic tong body control unit and a driller house integrated control unit which are connected with each other in communication. The system can realize the operation of various modes of the telescopic automatic hydraulic tong, can reduce the number of personnel operating the wellhead hydraulic tong, is favorable for guaranteeing the safety of personnel operation and equipment operation, can cooperate with a sensor to obtain position data, can realize unmanned drilling platform surface of workover operation with high cost performance, efficient make-up and break-out operation, and can realize the control method of the telescopic automatic hydraulic tong. The control method controls the operation of the telescopic automatic hydraulic tong in different modes during the process of tripping out and tripping in, can accurately control and monitor the action of the hydraulic tong through several target positions set by a fixed point, can guarantee the accuracy of tripping out and tripping in operation, can improve the system operation efficiency, and can reduce the cost by more than 1 / 3.

An active safety protection device for tripping a tubular column of a workover rig belongs to the safety production technology of oil field workover rigs, overcomes the defects in the prior art, and comprises a pressure sensor, an A / D sampling chip, a main chip, a keyboard, an LED display screen and a safety module, the pressure sensor is connected with the A / D sampling chip, the A / D sampling chip is connected with the main chip, and the main chip is connected with the keyboard. The keyboard, the LED display screen and the safety module are connected with the main chip; the safety module comprises an emergency braking device, an engine throttle disconnecting device, a roller clutch disconnecting device and an audible and visual alarm.

The invention relates to the technical field of petroleum and natural gas development, in particular to a cleaning tool and method for the inner wall of a wellbore tubular column for well repair operation of production wells such as daily oil wells, natural gas wells and water injection wells, and the cleaning tool for the inner wall of the wellbore tubular column comprises a barrel, a first piston, a second piston and a plugging piece. A first channel is arranged in the cylinder body in the axial direction, and through holes are formed in the periphery of the cylinder body; the first piston and the second piston are movably arranged at the two ends of the first channel in the axial direction of the barrel pipe body, and the outer walls of the first piston and the second piston are attached to the inner wall of the first channel; a second channel is formed in the second piston in the axial direction of the barrel, and the water outlet end of the second channel faces the first piston and communicates with the first channel; the blocking piece movably blocks the water inlet end of the second channel. Under-pressure operation can be achieved when a pipe column is put in and pulled out, the most basic process preparation is provided for an existing workover treatment technology, and shaft cleaning is achieved.

The present application belongs to the technical field of automatic workover in oil production engineering of petroleum industry, and discloses a kind of auxiliary lifting device and lifting method of automatic operation oil pipe under pressure, device includes derrick, hydraulic clamp, manipulator, auxiliary lifting device, lifting seat and control system, lifting seat and hydraulic clamp are installed on derrick, auxiliary lifting device is installed on lifting seat, the upper portion of auxiliary lifting device is equipped with clamping structure, clamping sensor is equipped on clamping structure, lifting structure is connected on the both sides of auxiliary lifting device, low sensor, mid sensor and high sensor are arranged on lifting structure.The method is that control system completes automatic auxiliary lifting to pipe column according to sensor signal, and real-time monitoring lifting position, improve the reliability of operation, the whole process is automatically completed by control system, workers only need remote monitoring, without direct participation, exclude the security risk produced by human factor, reduce the generation of oil pipe drop, personnel injury accident.

The invention relates to the technical field of workover rigs, in particular to a main roller brake device of a workover rig, which comprises a main roller and brake equipment, a use structure is arranged on one side of the brake equipment, and the use structure comprises a disassembly and assembly mechanism, a buffer mechanism and a protection mechanism. The dismounting and mounting mechanism comprises a placing plate, a bidirectional threaded rod, a threaded plate, clamping plates and a guide rod I. The inner wall of the placing plate is rotatably connected with one end of the bidirectional threaded rod. According to the main roller brake device of the workover rig, the positions of the two clamping plates can be rapidly and conveniently adjusted, and then brake equipment can be rapidly and conveniently fixedly mounted; and the limiting plate can be inserted into the supporting plate for further limiting and fixing, so that the problem that the brake device cannot be quickly and conveniently disassembled and assembled due to the fact that an operator needs to disassemble a large number of fixing bolts during disassembly and assembly every time is solved, and the working efficiency of the brake device is improved.

The invention discloses a novel stirring device for ocean well drilling and workover mud, which comprises a variable frequency motor, the variable frequency motor is connected with a speed reducer, the bottom of the speed reducer is fixed on a mounting plate, the lower part of the mounting plate is connected with a stirring shaft through a coupler, the upper part of the stirring shaft is connected with the output end of the speed reducer, and the lower part of the stirring shaft is connected with stirring blades; a plurality of mounting pieces are uniformly arranged on the outer cylindrical surface of the drum, the upper surfaces of the mounting pieces and the vertical axis of the drum form acute angles, the upper surfaces of the mounting pieces and the horizontal upper surface of the drum form acute angles, and blades are movably mounted on the mounting pieces to ensure the inclination angle progress of the blades. According to the invention, through CFD simulation design, the influence of the inclination angle, torsion angle, shape and height from the bottom of the container on the stirring effect is analyzed, the design parameters, number and distribution of the blades are optimized, directional flow is formed in the container, the turbulence energy loss is reduced, and the stirring efficiency is improved.

The invention discloses an integrated drilling and workover rig base capable of being rapidly disassembled and assembled and a using method thereof.The base can serve as an integral structure to be loaded on a flat plate transport vehicle for road transportation in the transportation state and comprises a bottom assembly; a top assembly; the front stand column, the rear stand column, the bottom assembly and the top assembly jointly form a parallelogram folding mechanism; the base lifting cylinder is connected between the bottom assembly and the top assembly; in the transportation state, the parallelogram folding mechanism is in the folded state, so that the top assembly is close to the bottom assembly in the height direction, and the overall appearance size of the base meets the height limiting and width limiting requirements of highway transportation. Through the parallelogram folding structure and the integral transportation design, the integral transportation of the base and the accessories in one train is realized. The two-stage hoisting mechanism is used for guaranteeing safe and stable hoisting, the transportation height is remarkably reduced, the road transportation standard is met, and finally the effects of improving the moving efficiency and reducing the operation cost and the safety risk are achieved.

This utility model discloses an electrically controlled precision cement plugging device for well workover operations, comprising a valve body with an equipment placement section; an equipment groove on the outer wall of the equipment placement section and a slide rail communicating with the equipment groove on the inner wall of the equipment placement section; a drive device in the equipment groove and a valve plate in the slide rail; the valve plate and the output shaft of the drive device are connected via a transmission mechanism; the drive device causes the valve plate to slide along the slide rail; and a plug core is placed above the valve plate inside the equipment placement section. This utility model reduces the labor intensity of operators, eliminates the need for backwashing operations, reduces oil layer contamination, avoids the generation of cement slag, and can achieve both solid and suspended plugs. It has a large single-use slurry capacity, capable of completing 30m of cement injection in one operation. Compared with conventional cement plugging operations, this device does not require the insertion of tubing; only a rapid sand dredging machine and cement injection tools are needed to complete the operation, significantly shortening the operation time per well.