192 results about "Workover" patented technology

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 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 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 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.

The invention relates to the technical field of oil and gas wellhead sealing equipment in the field of petroleum engineering, and discloses an oil and gas wellhead rotary sealing device suitable for workover treatment. The device consists of a bottom flange, a self-sealing middle body, a central pipe, a rotor upper body, a thrust bearing, a tapered roller bearing, a deep groove ball bearing, a lower rubber ring, an upper rubber ring, an upper rubber ring compression ring, a lower rubber ring compression ring, a gland and a positioning pin, is simple in structure, small in size and light in weight, adopts an integrated design, reduces redundant parts, is compact in overall structure, is convenient to mount and carry on site, and is convenient to maintain and maintain. The load burden of a wellhead is reduced; the sealing pressure is small, the sealing performance is good, reliable sealing can be achieved under the low pre-tightening pressure through the synergistic effect of mechanical pre-sealing and hydraulic sealing, and the sealing stability under the high-pressure working condition is effectively improved through the double-sealing mode; due to the design of the three-bearing structure and the detachable central pipe, the operation stability of the device under the complex working conditions of rotation, drilling and the like is guaranteed.

The present application belongs to the technical field of oilfield workover equipment, and particularly relates to a multifunctional hydraulic elevator device for oilfield workover operation. The multifunctional hydraulic elevator device for oilfield workover operation has the function of automatic cleaning, improves the functionality of the elevator device, reduces the labor intensity of the workers, and has better cleaning efficiency for the lifting hole. The multifunctional hydraulic elevator device for oilfield workover operation comprises: a lifting arm; the lifting arm is used for lifting the elevator device; a main seat is installed between the lifting arms; a hinge; the hinge is rotatably connected with the main seat through a pin shaft; the main seat and the hinge form a lifting hole; a hydraulic assembly is used for controlling the opening and closing of the hinge; water holes are circumferentially distributed on the top sidewall surface of the lifting hole; the water holes are communicated with an external water source through pipelines.

The utility model discloses an oil pipe lifting device for an integrated workover rig, and mainly relates to the field of oil pipe lifting operation. Comprising a mast stand column, a hinge seat and a fixing sleeve, the fixing sleeve is horizontally fixed to the side, close to a vehicle body, of a derrick, the hinge seat is located above the fixing sleeve and close to one end of the fixing sleeve, a swing seat is rotatably installed on the hinge seat, and a swing rod slidably connected with the swing seat penetrates through the swing seat; a follow-up sleeve perpendicular to the swing rod is fixed to the end, close to the fixed sleeve, of the swing rod, the follow-up sleeve and the fixed sleeve are vertically arranged in parallel, one end of the follow-up sleeve is matched with an upper telescopic rod in a telescopic mode, one end of the fixed sleeve is matched with a lower telescopic rod in a telescopic mode, and the tail end of the upper telescopic rod and the tail end of the lower telescopic rod are hinged to a mast stand column. A hoisting mechanism is installed on the mast stand column. The utility model has the beneficial effects that the device is mounted on the derrick of the workover vehicle, can be unfolded along with operation, and can be folded and attached to the derrick after the operation is completed, so that the convenient operation and movement are realized.

This invention relates to a fishing tool for well workover operations in oil and gas field exploration and development. It discloses a hands-free fishing barrel suitable for both mechanical and hydraulic dual-action. The barrel includes a shell assembly with a central connecting sleeve. An outer piston is fitted onto the outer circumference of the central connecting sleeve, forming a liquid-containing cavity I between the central connecting sleeve and the outer piston. An inner piston is fixedly connected to the central connecting sleeve via a shear pin. The upper ends of the central connecting sleeve and the inner piston enclose a liquid-containing cavity II. A slip and a milling shoe are fixedly connected to the lower end of the outer piston. After a ball is dropped into the neck of the central connecting sleeve, the fluid inside the tubing is pressurized. The fluid enters liquid-containing cavity I, pushing the outer piston upward and causing the slip to move upward. The fluid then enters liquid-containing cavity II, continuing to pressurize, causing the shear pin to break and the inner piston to move downward. This invention's hands-free fishing barrel, suitable for both mechanical and hydraulic dual-action, has a simple structure, is easy to operate, has high operational efficiency, and good performance.

The invention discloses a workover treatment efficient dismounting device based on a hydraulic boosting system and an operation method. The workover treatment efficient dismounting device comprises a supercharger and a back striking wrench. The supercharger comprises a shell, an oil way core, a throttling valve, an overflow valve, a control valve and a filter are installed in the shell, a supercharging module, an operating handle, an input inlet, an input outlet, a pressure measuring connector, an output inlet and an output outlet are installed outside the shell, the operating handle is connected with the control valve, and the supercharging module is connected with the filter. The back beating wrench comprises a bent handle, and the head of the bent handle is connected with a jackscrew. According to the invention, the function of dismounting rusted screws by using the low-pressure hydraulic pump of the workover rig in a manner of driving liquid with liquid is realized, the operation construction efficiency is improved, and the potential safety hazard of operation is eliminated.

The invention relates to the technical field of oil field underground workover treatment, in particular to an expanding milling shoe and a milling channel drilling method. The outer portion of the lower end of the upper connector is in threaded connection with a body, a piston is arranged in the body, a plurality of axial cutter grooves are formed in the side wall of the lower end of the body, cutter holders are fixed in the cutter grooves, the lower ends of the cutter holders are connected with cutter bodies capable of expanding outwards through rotating shafts, and cutter body slopes are arranged on the inner sides of the cutter bodies. A piston inclined face matched with the cutter body inclined face is arranged outside the lower end of the piston, a protruding cutter body boss is arranged at the upper end of the inner side of the cutter body, and a piston clamping table matched with the cutter body boss is arranged on the outer side wall of the piston. According to the expanding milling shoe, well descending can be achieved when the diameter is small, and milling can be achieved when the diameter is large, so that the expanding milling shoe can cover large transverse offset, the milling range is expanded, and the channel drilling success rate can be further increased by adopting the channel drilling method.

The present application relates to the technical fields of deepwater drilling and workover technology of offshore oil engineering, and particularly relates to a joint for emergency release of a deepwater light drilling and workover underwater riser and an operating method thereof. The emergency release joint comprises an upper joint body and a lower joint body which are mutually butted. A locking assembly composed of a clamp and a support ring is arranged on the periphery of the butt joint, and an electromagnetic drive assembly is correspondingly arranged. Upper and lower blowout preventer modules are arranged on both sides of the butt joint along the fluid passage in axial opposition. The electromagnetic drive assembly is used to drive the support ring to move between two working positions, so as to control the locking or releasing of the clamp on the butt joint. In operation, the upper and lower blowout preventer modules are first controlled to be closed, and then the mechanical locking is released to realize the release of the joint. After reconnection, the mechanical locking is restored and the fluid passage is opened. The scheme is suitable for emergency release and subsequent reconnection of the deepwater riser under abnormal working conditions.

The present application relates to the technical field of oil and gas exploitation, and particularly relates to a heat pump circulation viscosity reduction device based on center pipe closed heat exchange and a use method. The technical scheme is that a center pipe heat exchange unit is located in a production oil pipe, and a ground circulation unit is located at one side of a wellhead device; a hollow sucker rod column of the center pipe heat exchange unit is provided with an inner center pipe, a bottom of the inner center pipe is provided with a center pipe bottom head, and a pipe wall of an upper side is provided with more than one center pipe bottom side opening; the beneficial effects are that heat exchange working medium heated by a heat pump is lowered along the inner center pipe to the hollow sucker rod column in a wellbore, and then is raised to a near ground position along the center pipe bottom side opening between the inner center pipe and the hollow sucker rod column, closed heat exchange prevents blockage and circulation, energy consumption is greatly reduced by using the heat pump technology and the geothermal energy, safety is improved, the function of preventing blockage and increasing production is effectively realized, and the number of workover operations is reduced.

The application provides an oil field workover differential sand washing tool comprising an expansion packer and relates to the field of oil field workover tools. The oil field workover differential sand washing tool comprising an expansion packer comprises a backflush valve, the inner middle part of the backflush valve is provided with a differential mandrel, the inner wall of the backflush valve is fixedly connected with expansion packers on the upper side and the lower side, the inside of the differential mandrel is slidably connected with a taper head, one end of the differential mandrel is fixedly connected with a nozzle, the right side of the backflush valve is fixedly connected with a guide head, and the outside of the differential mandrel is provided with a reset spring. The differential sand washing tool can greatly improve the efficiency of sand washing and well washing, reduce sand washing operation time, and prevent the reflow of sand in the wellbore into the bottom layer, so that sand washing is complete. The working state of the tool is controlled only by the displacement and pressure change of a pump truck, and the conversion between the two working states is fast and simple.

The invention discloses an electrically-controlled setting recyclable bridge plug used in the technical field of well completion and well repair of oil and gas wells. The electrically-controlled setting recyclable bridge plug comprises a connecting module, a setting control module and a setting execution module. The setting control module comprises a motor, a lead screw and a piston assembly, and a liquid inlet hole is formed in the center pipe. When the bridge plug descends and does not reach the setting position, the piston does not block the liquid inlet hole, liquid in a well can flow through the central pipe, and the bridge plug cannot form a pressure building state. When the bridge plug reaches a preset setting position, the control unit controls the motor to drive the lead screw to rotate, the piston is pushed to move axially to plug the liquid inlet hole, and pressure building is achieved. And the setting execution module drives the slip to anchor and extrude the rubber sleeve to realize sealing setting under the action of hydraulic pressure. And after setting is completed, the piston is reset by controlling reverse driving of the motor, the liquid inlet hole is opened again, pressure building is canceled, setting is relieved, and bridge plug recycling is completed. The packer is reasonable and compact in structure, controllable in setting process and capable of reducing the number of times of lifting and lowering a tubular column and improving the safety of underground operation.

This invention discloses a hydraulic tongs straightening device and drilling and workover equipment, relating to the field of oil drilling equipment technology. The hydraulic tongs straightening device includes multiple straightening components. The straightening centers of the multiple straightening components and the clamping center of the hydraulic tongs are located on the same straight line. The multiple straightening components are sequentially arranged along the straight line on the drill pipe entry side of the hydraulic tongs. The hydraulic tongs are used to allow the tubing string to enter the clamping center from the drill pipe entry side and clamp the tubing string. While straightening the tubing string, the straightening components allow the tubing string to move along the straightening center towards the hydraulic tongs so that the tubing string enters the hydraulic tongs from the drill pipe entry side. The drilling and workover equipment includes the equipment body, the hydraulic tongs, and the aforementioned hydraulic tongs straightening device. This invention improves the straightening effect on the tubing string and avoids the tubing string impacting and damaging the hydraulic tongs.

This utility model discloses a drilling and workover operation monitoring system, including a trolley. A disc rotates in the middle of the trolley, and a support plate is mounted on the upper side of the disc. A rectangular frame slides on one side of the support plate, and a horizontal plate is mounted on the upper end of the rectangular frame. A concave support column and two plates are mounted on the upper side of the horizontal plate. An arc-shaped top plate rotates in conjunction with the upper end of the concave support column, and a sound sensing pad is mounted on the upper side of the arc-shaped top plate. A rod rotates between the two plates. This utility model uses the rectangular frame to synchronously raise and lower the sound sensing pad and two gas detection heads. The height of the sound sensing pad and the two gas detection heads can be adjusted according to different downhole channel heights. The rod allows a first rope to be wound around its perimeter and pull one end of the arc-shaped top plate, making it better contact with the surface of smaller cracks or holes to detect smaller sounds.

1. The name of the design product: well repair machine operating platform (XJ900). 2. The use of the design product: the design product is used for the operating platform of the well repair machine. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1. 5. The bottom of the design product is the part that is not easy to see or cannot be seen during use, and the top view is omitted.

The application discloses an oil outlet valve cover of a sucker rod pump and the sucker rod pump. The oil outlet valve cover is characterized in that the outer diameter of the oil outlet valve cover body provided with a liquid flow hole is larger than the inner diameter of a pump barrel, the upper end of the oil outlet valve cover body is connected with a sucker rod string, and the lower end of the oil outlet valve cover body is sequentially connected with a valve body of a sucker rod pump plunger and a traveling valve through a connecting short joint. The oil outlet valve cover body can move up and down in the space formed after the oil pipe is connected with an oil pipe connector and the pump barrel and is always located above the pump barrel. The sucker rod pump in the application can be applied to oil wells requiring small pump depth pumping and can also be normally applied to high-inclination wells and small-diameter sidetracking wells. The application effectively improves the working environment of the oil outlet valve cover, significantly reduces or eliminates the failure of the oil outlet valve cover caused by the above problems, and thus completely avoids the short pump inspection period and high workover operation cost caused by the failure of the oil outlet valve cover.

The utility model belongs to the technical field of petroleum workover equipment, concretely relates to a hydraulic tong station adjusting device and workover equipment, including the adjusting frame and the chassis, the longitudinal beam that sets up two hydraulic cylinders in the middle part of chassis is hinged, the piston rod end of two hydraulic cylinders all is hinged on the adjusting frame, the adjusting frame is driven its rotation around the axis of articulation shaft and drives hydraulic tong swing relative to the chassis by the piston rod telescopic drive of hydraulic cylinder, when the adjusting frame swings to the second end of chassis, and the limit support that this end of chassis is perpendicular fixed limits the contact. The utility model has realized the continuous, stable and automatic swing switching of hydraulic tong from the work position to the retreat position, reduced the strength of manual operation, improved the operation efficiency, reduced the operation error and the security risk caused by human factor, ensured that the hydraulic tong in non - working state, the equipment can absolutely stably keep in the retreat position, satisfied the extreme requirement of safety of wellhead unmanned operation.

The invention discloses an intelligent workover rig and an operation method thereof, and relates to the technical field of workover rigs. The intelligent workover rig comprises a loading vehicle, a rack is installed on the loading vehicle, a workover unit is loaded on the front face of the rack, one side of a bottom plate is located at the bottom of the loading vehicle, the bottom of the outer wall of a supporting plate is in sliding clamping connection with the bottom plate, and a supporting assembly is arranged between the supporting plate and a profile steel plate; the adjusting assembly is arranged on one side of the supporting plate and used for adjusting the supporting force, acting on the profile steel plate through the supporting assembly, of the supporting plate. By means of the cooperative use mode of the loading vehicle, the rack, the well repairing unit, the profile steel plate, the bottom plate, the supporting plate, the supporting assembly and the adjusting assembly, the loading vehicle can extrude and position the bottom plate, so that the supporting plate can support and protect the rack through the supporting assembly and the adjusting assembly, and the stability of the operation that the rack loads the well repairing unit is guaranteed; and the adjusting assembly can also detect the operation state of the rack, so that the stability of the rack during operation is improved.

The utility model relates to the technical field of oil field workover bridge seats, and discloses an oil field workover bridge seat safety tilting prevention device which comprises a base and a workover bridge body, a hydraulic oil cylinder support is arranged at the lower end of the base, a connecting seat is arranged on the outer side of the base, fixing bolts are arranged at the ends of the two sides of the connecting seat, and one end of each fixing bolt is in threaded connection with the connecting seat. Four groups of counterweight seats are arranged on the outer side of the base and are mounted at four corners of the base, mounting grooves are formed in one ends of the counterweight seats, limiting rods are arranged in the mounting grooves and are perpendicular to the mounting grooves, the limiting rods are fixedly connected with the counterweight seats, counterweight blocks are arranged on the outer sides of the limiting rods, and connecting plates are arranged between every two adjacent groups of counterweight seats; the two sides of the connecting plate are fixedly connected with the counterweight seat, and a reinforcing assembly capable of improving the stability of the connecting plate is arranged at the upper end of the connecting plate. According to the well repair bridge seat, by arranging the reinforcing assembly, the overall stability of the well repair bridge seat can be improved, the phenomenon that the bridge seat inclines and topples over is avoided, and potential safety hazards of the well repair bridge seat can be reduced.

The present application belongs to the field of oilfield chemistry and workover engineering process, and discloses a stratum working fluid for thick oil viscosity reduction, a working system, a preparation method and application thereof. The stratum working fluid for thick oil viscosity reduction comprises the following components by weight: 60-91 parts of water, 1-5 parts of anti-swelling agent, 5-20 parts of stratum cleaning agent and 3-15 parts of thick oil viscosity reducer. The working system for thick oil viscosity reduction comprises the above-mentioned stratum working fluid and a wellbore working fluid for cleaning dead oil in the wellbore. The stratum working fluid of the present application reduces the viscosity of crude oil in the near wellbore zone through viscosity reduction and dispersion, wetting drag reduction and surfactant assisted cleanup, reduces organic plugging, and has little corrosion to the pipe string. When the working system of the present application is applied, the soak time is greatly shortened, the entire construction process can be completed within three days, the construction period is greatly shortened, and the production efficiency is improved.

The invention discloses a water control type workover fluid and a preparation method thereof. The water control type workover fluid is prepared from the following components in parts by weight: 2 parts of a clay stabilizer, 0.2-1 part of a high-temperature chelating agent, 0.5-1 part of a corrosion inhibition bactericide, 1-2 parts of a waterproof locking agent, 5 parts of a phase change agent and 100 parts of filtered seawater. The method comprises the following steps: filtering the filtered seawater until suspended particles are less than 30 microns in standard value, sequentially adding a clay stabilizer, a high-temperature chelating agent, a corrosion inhibition bactericide, a water blocking prevention agent and a phase change agent, and uniformly stirring to obtain the water control type workover fluid. After the workover fluid enters a reservoir, the oil phase starting pressure can be reduced, the oil-water interfacial tension can be reduced, the effect of inhibiting water content rising after well workover is achieved, the workover fluid can be matched with different field operation types, and the recovery period of an oil well can be shortened.

The present application relates to the technical field of petroleum extraction equipment. Disclosed are an automated workover device and a control method therefor, and an apparatus, a medium and a product. In the automated workover device, a wellhead platform arranged on a wellhead provides a mounting platform for pneumatic slips, workover hydraulic tongs, and a workover hydraulic tong drive module; tubing is fixed by means of the pneumatic slips to prevent the tubing from falling into a well; the workover hydraulic tongs are pushed by means of the workover hydraulic tong drive module to move closer to or away from the wellhead; and after the workover hydraulic tongs are moved closer to the wellhead, an automatic make-up or break-out operation is performed on upper and lower tubing sections at the wellhead on the basis of a preset rotational direction, rotational speed, number of rotations and rotational torque. In the solution of the present application, the workover hydraulic tongs are pushed by the drive module to move closer to and away from the wellhead, thereby replacing the manual dragging manner in conventional solutions, such that automated workover operations can be achieved, and the efficiency of workover operations can be improved while the safety risks of personnel and apparatuses are reduced.

The invention belongs to the field of oil and gas exploration and development, and relates to an oil drilling and workover well mouth centering and aligning device and method.The device comprises an upper flange and a lower flange, the upper flange is connected with a rotary control head, the lower flange is connected with an annular blowout preventer, a sealing device is arranged between the upper flange and the lower flange, and the upper flange and the lower flange are each sleeved with a pressing plate; the pressing plate on the upper flange and the pressing plate on the lower flange are detachably connected through a fastening device, and adjusting bolts used for adjusting the upper flange to move in the horizontal direction are arranged on the pressing plate on the upper flange and the pressing plate on the lower flange. A flange position adjusting device is designed, horizontal multi-direction free adjustment can be simply and rapidly achieved, a wellhead can be rapidly, safely and effectively corrected, and vertical centering alignment of the center of wellhead devices such as a rotary control head of the device and a crown block and a traveling block is achieved.

The application relates to the technical field of oil workover operation, and particularly discloses a sliding rail type variable-diameter running-in device and a running-in method. The sliding rail type variable-diameter running-in device comprises an upper joint, a driving member, a center body, a split claw, an expansion rib and a locking member, the upper joint is sleeved outside one end of the center body, the locking member is sleeved outside the other end of the center body, one end of the upper joint is used for connecting a downhole tool, the other end of the upper joint is radially spaced apart from the center body and is provided with the axially movable driving member between the center body, the split claw is sleeved outside the center body and is connected with the driving member, the driving member can drive the split claw to move axially, the expansion rib is sleeved outside the center body and is located between the split claw and the locking member, the expansion rib can move radially relative to the center body along with the axial movement of the split claw to change the outer diameter of the sliding rail type variable-diameter running-in device. The running-in device and the method for switching the outer diameter are simple and convenient, and the running-in operation of the multiple sizes of casings can be completed by lifting one operation pipe column.

The utility model provides a petroleum workover rig with a horizontal orientation function. The petroleum workover rig comprises a workover rig body. The extension assemblies are fixedly mounted on the front surface and the back surface of the workover rig body respectively; and the adjusting assemblies are arranged at the two ends of the two extending assemblies correspondingly, each adjusting assembly comprises a supporting rod, an adjusting rod and a driving telescopic part, the adjusting rods are slidably connected to the interiors of the bottoms of the supporting rods, and the driving telescopic parts are fixedly installed in the interiors of the tops of the supporting rods. According to the petroleum workover rig with the horizontal orientation function, through cooperative work of the extending assembly and the adjusting assembly, when the petroleum workover rig is used, the petroleum workover rig can be rapidly and accurately adjusted to be in the horizontal state, the influence on workover operation caused by the change of the horizontal position of a derrick is effectively avoided, and the working efficiency is improved. And the accuracy and the safety of workover treatment are improved.

This invention relates to a smart stratified injection-production string for carbon dioxide injection, comprising a first tubing and a second tubing connected by a backwash valve or a release tool. A hydraulic feedback pump is installed on the first tubing, and several packers are installed at intervals on the second tubing. A smart control switch tool is installed between two adjacent packers, each corresponding to an oil layer. An anchoring tool is also installed on the second tubing. This invention enables stratified injection, well shut-in, well release, and stratified production of carbon dioxide in any one or more layers without moving the injection-production string. This effectively improves the effective utilization rate of carbon dioxide, the degree of oil layer utilization, and the injection-production conversion efficiency, thereby increasing injection-production efficiency and oil recovery rate, reducing well workover work, well occupation time, and well cleaning and well layer contamination, and lowering operating costs.