570 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 discloses an automatic oil pipe transfer system and method, and belongs to the technical field of oil automation under-pressure workover pipe column transfer, the system comprises a pipe bin, a storing and taking manipulator, a variable-amplitude arm, a lifting manipulator and a control system, and the pipe bin, the storing and taking manipulator, the variable-amplitude arm and the lifting manipulator are all connected with the control system. Supporting legs of the pipe bin are adjusted, so that the oil pipe column can roll to a pipe column baffle; the control system starts a lifting mechanism of the storing and taking manipulator, and the oil pipe column is transferred between the pipe bin and the variable-amplitude arm; the variable-amplitude arm is converted from a horizontal state to a vertical state under the driving of the displacement device, the variable-amplitude arm and a second manipulator of the lifting manipulator are connected with an oil pipe string, the lifting manipulator is vertically lifted to a preset position under the driving of the lifting mechanism, and the lifting manipulator is driven by the horizontal rotation driving mechanism to complete horizontal rotation and transfer the oil pipe string to a wellhead; according to the invention, operators can be liberated from a high-altitude operation platform, the safety risk in the operation process is reduced, and the operation accuracy is improved.

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.

The utility model relates to the field of workover rig derricks, in particular to a workover rig derrick positioning device which comprises a positioning frame, an adjusting structure is arranged on the outer wall of the inner side of the positioning frame, and auxiliary assemblies are installed on the outer walls of the four corners of the positioning frame. The adjusting structure comprises first adjusting grooves symmetrically formed in the outer wall of the inner side of the positioning frame, a two-way screw rotationally connected to the positioning frame and located in the centers of the first adjusting grooves, and positioning rods screwed to the two ends of the outer wall of the two-way screw. The second adjusting grooves are formed in the outer walls of the sides, close to each other, of the positioning rods, and the positioning screws are rotationally connected to the centers of the second adjusting grooves. The second motor and the first motor drive the positioning rings to be close to each other through the bevel gears, the drill rods are limited in the inner rings of the positioning rings after the positioning rings are combined, shaking of the drill rods is limited, butt joint of the drill rods is facilitated, and adjustment and positioning are facilitated; the positioning frame is located in the center of the interior of the derrick, and safety is improved.

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.

According to the oil pumping unit facilitating well repair receding and the well repair receding method, an innovative framework is adopted in design of the oil pumping unit, and the rotating assembly and the pin pulling assembly are assembled at the working horse head end and the walking beam end correspondingly, so that the intelligent receding function is achieved. The transmission structure is compact and reasonable in layout, and the adopted mechanical mode has high stability and reliability. By means of the design, automatic receding of the horsehead in the well repairing process of the oil pumping unit is achieved, the whole oil pumping unit does not need to be moved, and manual horsehead dismounting operation is not needed. Potential safety hazards possibly caused in the operation processes of climbing operation, hoisting operation and the like of personnel are fundamentally avoided, and meanwhile relevant expenses are saved. In addition, the method greatly simplifies the preparatory work flow before the maintenance operation, and effectively reduces the labor intensity of operators. And moreover, the operation is simple, convenient and feasible, an operator can operate without professional technical knowledge, and an efficient and safe guarantee is provided for preparation work of workover treatment.

The utility model discloses a well workover flow-back fluid treatment system based on oil-based mud. The well workover flow-back fluid treatment system comprises a first heating reaction kettle and a second heating reaction kettle, the vibrating screen is communicated with one end of the first heating reaction kettle; one end of the second heating reaction kettle is communicated with the vibrating screen; one end of the horizontal screw centrifuge is communicated with the other end of the second heating reaction kettle; the three-phase disc type centrifugal machine is communicated with the other end of the horizontal screw centrifugal machine; the oil-water separation filter is communicated with the three-phase disc type centrifugal machine; the rock debris collecting box is communicated with the vibrating screen, the horizontal screw centrifuge and the three-phase disc type centrifuge at the same time; and the white oil tank is simultaneously connected with the oil-water separation filter and the three-phase disc type centrifugal machine. And the oil-based mud well completion flow-back fluid can be directly and continuously operated on site, so that the wastewater reaches the standard and is discharged, and the wellhead operation efficiency of a drilling platform is improved.

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 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 present disclosure provides automated equipment for drilling and workover operations of oil field, and an oil field workover operation device, an integrated hydraulic clamp, a buckling apparatus and a string automated operating apparatus, and a derrick floor pipe handling manipulator for use in the automated equipment. The automated equipment comprises a workover rig, a derrick floor, an elevator, a monkey-board string automatic placement apparatus, a slip, an oil field workover operation device, a power clamp, and a derrick floor pipe handling manipulator, and the workover rig, the derrick floor, the elevator, the monkey-board string automatic placement apparatus, the slip, the oil field workover operation device, the power clamp, and the derrick floor pipe handling manipulator cooperate with each other to realize a lifting operation and a lowering operation of a string at a wellhead. The workover rig has a derrick, the workover rig is arranged along a front-rear direction of the automated equipment, and the derrick is disposed at a rear end portion of the workover rig and aligned with the wellhead. The derrick floor is placed on the ground and disposed at the wellhead, and the derrick floor is disposed adjacent to the derrick. The oil field workover operation device is positioned on one side of the wellhead in a left-right direction of the automated equipment, and the oil field workover operation device is disposed on the derrick floor in a manner of being movable between a raised position where the oil field workover operation device extends out above the derrick floor and a retreated position where the oil field workover operation device retreats below the derrick floor. The automated equipment in the present disclosure significantly improves operation efficiency of the drilling and workover operations, greatly reduces manual operation strength, and improves safety factor.

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 utility model relates to the technical field of oil and gas drilling and production equipment, in particular to a continuous rotary iron roughneck under-pressure operation system. The continuously-rotating iron roughneck comprises a main tong, the main tong is rotationally connected with a back-up tong through a rotating mechanism, the back-up tong is located below the main tong, the main tong is installed on a first shell, the first shell is elastically connected with the rotating mechanism through at least four elastic assemblies, the back-up tong is installed on a second shell, and the second shell is connected with the rotating mechanism through at least four elastic assemblies. And the second shell is fixedly connected with the slewing mechanism. The elastic assembly of the iron roughneck can compensate the distance change caused by tightening or loosening of a pipe column screw thread, and the elastic assembly can adapt to the angle deviation in the horizontal plane to a certain degree and help to better align a pipe column; according to the iron roughneck, various problems caused by rigid connection of the main clamp and the slewing mechanism are ingeniously solved, the adaptability and the operation efficiency of equipment are improved, the risk of damage to a tubular column is reduced, and the safety and the reliability of workover treatment under pressure are 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 a spiral self-tightening type oil pipe anti-jacking slip which is applied to the technical field of oil field workover equipment and comprises a mounting base, a plurality of clamping mechanisms, a pressing ring and a driving mechanism, each clamping mechanism comprises a clamping block, the clamping blocks are arranged on the mounting base in a sliding mode, the multiple clamping blocks are distributed in a circumferential mode, and oil pipe clamping space is formed between the multiple clamping blocks; the inner side ring surface of the pressing ring is a conical surface, the pressing ring is arranged on the multiple clamping blocks in a sleeving mode from top to bottom, and the ends, away from the oil pipe clamping space, of the multiple clamping blocks are matched with the inner side ring surface of the pressing ring; the driving mechanism is used for driving the pressing ring to do lifting motion. According to the oil pipe clamping device, the pressing ring is arranged, when the driving mechanism drives the pressing ring to move downwards, the inner side face of the pressing ring abuts against the multiple clamping blocks, the multiple clamping blocks synchronously move towards one side of the oil pipe clamping space till the ends of the multiple clamping blocks abut against the annular face of the oil pipe, and the oil pipe is clamped; due to the fact that the ends, away from the oil pipe clamping space, of the clamping blocks are matched with the inner side ring face of the pressing ring, the clamping blocks are narrow in upper portions and wide in lower portions, the oil pipe is jacked upwards, the clamping blocks clamp the oil pipe more tightly, and the self-tightening effect is achieved.

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 invention discloses an oil layer anti-pollution pipe column and an oil layer anti-pollution method. The tubular column comprises a central tube, an expansion piece, a protector, a packer and a positioner which are sequentially connected from top to bottom, the positioner can expand outwards and be tightly attached to the inner wall of a shaft so that the oil layer anti-pollution pipe column can be positioned at the preset depth of the shaft. The packer is used for blocking a shaft annulus; the protector is used for controlling the flow direction of fluid in the shaft; the expansion piece can be converted into a free expansion state from a locking state so as to partially counteract the force borne by the packer; according to the tubular column, the flow direction of fluid in a shaft is controlled through the protector, different fluid channels are established, well washing fluid directly flows to the shaft annulus, well washing circulation is formed, crude oil is extracted from the center pipe from the well bottom, and therefore the well washing fluid can be prevented from flowing into the well bottom to cause oil layer pollution, and long-term stable production of an oil well is guaranteed; and the operation cost of well washing and production is reduced, and the well repair period is prolonged.

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.