47results about How to "Improve workover efficiency" patented technology

The invention relates to the technical field of petroleum workover operation devices and methods, in particular to an automatic elevator for a sucker rod in oilfield workover operation and a use method. According to the technical scheme, the upper part of a large bevel gear is engaged with a bevel pinion, the lower part of the large bevel gear drives clamping jaws, and a stepping motor drives themultiple clamping jaws to advance and retreat through transmission of the bevel pinion and the large bevel gear; an inductive sensor is installed on the lower surface of an elevator box; and the stepping motor, a stepping motor driver and a stepping motor controller are connected with an elevator end cover through bolts, a direct-current power supply is installed on the upper surface of the elevator end cover, the elevator box is installed on a hanging ring through a hanging hook, and the elevator end cover is connected with the elevator box through bolts. The automatic elevator has the advantages that clamping of a push bearing surface shoulder of the sucker rod is completed through the clamping jaws, and the automation of the elevator is achieved through the inductive sensor; and the workover operation efficiency is improved, the labor intensity of workers is reduced, the personal safety of the workers is guaranteed, and the transformation from man-machine collaborative operation toautomation and intelligentization is achieved.

The invention provides a temporary plugging agent and a preparation method thereof. With the total mass of the temporary plugging agent as 100wt%, the temporary plugging agent comprises the raw materials of 25-35wt% of a high temperature salt-resistant extra high molecular polymer, 25-30wt% of modified oil soluble resin, 15-20wt% of a cross-linking agent, 5-10wt% of a surface active agent, 1-5wt% of solid particles and 1-5wt% of a fiber temperature-resistant material, wherein the sum of the mass percents of the raw materials of the temporary plugging agent is 100%; and the raw materials of the temporary plugging agent are all solid particles, and the diameters of the particles are 200-300 meshes. The invention further provides the preparation method of the temporary plugging agent. The temporary plugging agent can conduct continuous sand washing on an oil well, change of output after operation is not large, and construction and plug removal can succeed for one time; and the temporary plugging agent is suitable for sand washing construction of a heavy oil well, the sand washing effect is good, sand washing is thorough, the leakage amount is less, and the pump inspection period is prolonged.

The invention discloses an under-pressure well repairing working device and method of an oil-gas field. The device comprises a fixed-pressure valve mounted on a getting-in production pipeline; the upper part of a four-way joint is provided with a coupling detector, a lower annular anti-spraying device, a built-in hydraulic lift sub, a three-flashboard anti-spraying device, a sleeve short section and an upper annular anti-spraying device in sequence; the device further comprises a hydraulic control cabinet; the hydraulic control cabinet is connected with the built-in hydraulic lift sub, the three-flashboard anti-spraying device, the upper annular anti-spraying device and the lower annular anti-spraying device respectively; the method comprises the following steps: S1, a sucker rod works; S2, an oil pumping rod, a pump and other tools work. The well repairing working device and method, disclosed by the invention, completely break through a bottleneck of traditional well repairing work; well repairing pressure can be controlled to be lower than getting-in production pressure so that a pressure grade of needed equipment is reduced, the machining and manufacturing cost of the equipment is greatly reduced and the operation cost of an oil-gas well is reduced; furthermore, the difficulty that the well can be repaired only if the well is closed is innovatively overcome.

The invention discloses a one-pass pipe string layered water injection sand control backwashing device, comprises a reservoir casing which is inserted into the first injection layer, the second injection layer, the third injection layer and the fourth injection layer in turn, wherein the reservoir casing is provided with an inner layer setting sealing water injection backwashing integrated pipe string which has water injection function and is compatible with backwashing well function, and an outer layer sand control pipe string which has independent screen pipe type sand control function; Theinner-layer set seal inspection and backwashing integrated pipe string is arranged in the blind pipe of the outer sand control pipe string, and the upper part of the screen pipe is connected with thestandard oil pipe, and the outer part is connected with the release packer of the outer sand control pipe string, and the release packer and the release packer form an integral whole through the cablesuspension release sealing device. The invention realizes setting and checking seal, ensures sealing effect of packers at all levels, realizes water injection and backwashing function after setting,integrates setting and backwashing operation mode, reduces risk of later operation, and improves workover efficiency.

The invention discloses a deformed casing repairing device and belongs to the technical field of deformed casings. The deformed casing repairing device comprises an antisticking hydraulic anchor, a travel booster, a hydraulic accumulator, an intelligent commutator, a hydraulic impactor and a split expansion pipe joint, wherein a lower joint of the antisticking hydraulic anchor is in seamless joint with an upper joint of the travel booster, the lower end of the travel booster is in seamless joint with the upper end of the hydraulic accumulator, and the lower end of the hydraulic accumulator is in seamless joint with the upper end of the intelligent commutator; the lower end of the intelligent commutator is in sealed joint with the upper end of the hydraulic impactor, and a sixth impact cavity of the intelligent commutator is in communicated joint with a hydraulic impactor core tube of the hydraulic impactor; an impact head of the hydraulic impactor is contacted with a boosting block on the split expansion pipe joint. The provided deformed casing repairing device can overcome defects of a conventional repairing technology, continuously repairs a casing and is controllable in repairing, high in repairing efficiency and low in repairing cost.

The invention discloses a petroleum workover operation robot. The petroleum workover operation robot comprises a base device, a righting guiding device, a large arm device, a pendulum seat transmission device, a length measuring device and a hydraulic control system. The hydraulic control system controls the base device, the righting guiding device, the large arm device, the pendulum seat transmission device and the length measuring device to act. Compared with a petroleum workover operation robot in the prior art, the structure is more compact, reasonable and reliable, and the problems that the on-site manual labor intensity is high, the workover efficiency is low, energy consumption is high, and environment pollution is easily caused are solved; and automation of workover operation is achieved. The petroleum workover operation robot is small in occupied area, flexible in wellhead tossing and high in automation degree, and the workover efficiency is greatly improved.

The invention relates to petroleum machinery, in particular to a removable anti-blocking safety valve, which comprises a valve body (1) and a valve spool component (2). An anti-blocking cover (5) is arranged at the upper end of the valve spool component (2), an overflow hole (6) is arranged on the wall of the anti-blocking cover (5), and an elastic clamp (7) is sleeved outside the anti-blocking cover (5). A special fishing tool comprises a cable fixing portion (12) at the upper end and an unlocking fishing portion (13) at the lower end. The removable anti-blocking safety valve has the advantages of simple structure and convenience in disassembly and assembly, and can be rapidly removed by the special fishing tool when a downhole goes wrong, so that well repair efficiency is greatly improved, the process of disassembling and drilling for well repair is avoided, and the removable anti-blocking safety valve has a quite high economic significance.

The invention relates to the technical field of oil and gas development of oil fields, and discloses an operation driving device of an oil-electricity hybrid power workover rig. The operation drivingdevice comprises a permanent magnet synchronous motor and an angle transmission box, wherein a chain wheel is arranged at the power output end of a power shaft of the angle transmission box; the powershaft is rotationally connected with a bevel gear I and a bevel gear II, and is fixedly connected with a reversing shifting fork in the radial direction; the bevel gear I and the bevel gear II are respectively connected with the reversing shifting fork in a sliding manner in the axial direction of the power shaft, and are connected with a bevel gear III in an engaged manner; an input flange is arranged at the power input end of the power shaft of the angle transmission box; and the input flange is fixedly connected with a coupling, an output flange and the permanent magnet synchronous motor in sequence. Through the operation driving device of the oil-electricity hybrid power workover rig, a vehicle-mounted power system and a permanent magnet synchronous motor power system coexist to perform workover operation; vehicle-mounted power is adopted during migration between well sites; permanent magnet synchronous motor power is adopted during light-load workover operation; and hybrid powerof the vehicle-mounted power and the permanent magnet synchronous motor power is adopted during heavy-load workover operation, so that the energy conservation and the environmental protection are realized, and the workover operation efficiency is improved.

The invention relates to the technical field of oil field exploitation, in particular to a pipe rod storage device for oil field workover operation. The pipe rod storage device comprises a base, a bracket located at the left and right ends of the base, a pipe rod blocking member fixedly arranged on the base, a horizontal moving mechanism, a vertical moving mechanism, a clamping mechanism, a detecting mechanism and a control mechanism; the horizontal moving mechanism comprises a guide rail member arranged on the bracket and extending in the front and rear direction of the base, a support wheelrotationally arranged on a moving frame and supported by the guide rail member and a driving motor arranged on the moving frame and used for driving the support wheel to rotate; the vertical moving mechanism is arranged on the moving frame and can move up and down; the clamping mechanism is arranged at the lower end of the vertical moving mechanism and used for clamping a pipe rod; the detecting mechanism is arranged on the bracket and used for detecting the length of the pipe rod clamped by the clamping mechanism; and the control mechanism is arranged on the bracket and used for controlling the horizontal moving mechanism, the vertical moving mechanism, the clamping mechanism and the detecting mechanism to move.

Disclosed is an intelligent large hook for mechanical workover operation. The intelligent large hook for mechanical workover operation comprises a hook body and an automatic locking mechanism. The automatic locking mechanism is arranged on a hook tip at the position of an inlet of the hook body, and comprises a rack and a rack extension driving mechanism, wherein a guide device which guarantees the movement trail of the rack is further arranged on the two sides of the rack. The rack extension driving mechanism comprises a motor, a worm wheel and a worm, wherein the motor is connected with the worm wheel through the worm, the worm wheel sleeves a mandrel, and the worm wheel and the rack are in meshing connection. The guide device comprises hinge pins and rack movement tracks, wherein the hinge pins are installed on the two sides of the rear end of the rack, the rack movement tracks are formed inside the hook tip on the two sides of the rack, and the rack performs front-and-rear linear movement along the rack movement tracks through the hinge pins. According to the invention, a lifting ring and a lifting clamp do not need to be manually taken down or be righted, mechanical workover operation without operators on a wellhead is achieved, the work intensity of workers is reduced, the wellhead axis time is not occupied by operation, and then the efficiency of mechanical workover operation is improved.

A gantry derrick allowing operation under pressure comprises two expansion masts, a mast cross beam, a walking large hook, a large fixed pulley unit, a large hook hydraulic winch and a support platform; the two expansion masts are mounted on a ground vertically through support legs; the upper ends of the two expansion masts are connected through the mast cross beam; the lower ends of the expansionmasts are fixed together through a connection seat; the large fixed pulley unit is mounted on the mast cross beam; the support platform is fixed between the two expansion masts; the large hook hydraulic winch is mounted on the support platform; a wire rope of the large hook hydraulic winch is wound around the large fixed pulley unit and connected with the walking large hook. The gantry derrick with the walking large hook has great lifting force and is convenient to operate, so that workover time is effectively shortened. The defect that existing derricks for operation under pressure have lifting force and working efficiency problems is overcome; the gantry derrick is suitable for the under-pressure workover operation for water wells, oil wells and gas wells having various depths, workoverefficiency can be improved, and consumption of manpower and material sources is reduced.

The invention provides an external power pipe rod conveyor, and relates to the technical field of oil field workover devices. The external power pipe rod conveyor comprises a rack, a hoisting mechanism, a telescopic mechanism, a turnover mechanism and a hydraulic system, wherein at least one side of the rack is provided with a feeding mechanism; the hoisting mechanism is arranged on the rack; thetelescopic mechanism is arranged on the hoisting mechanism; the turnover mechanism is arranged on the telescopic mechanism, the telescopic mechanism is used for driving the turnover mechanism to move,and the turnover mechanism is used for turning over towards one side of the rack; and the hydraulic system comprises a hydraulic quick coupling used for communicating with a hydraulic loop of an external hydraulic source, a flow control system used for controlling the flow of hydraulic oil in the hydraulic system, a high-pressure filter used for filtering the hydraulic oil in the hydraulic systemand a hydraulic valve set used for controlling all the mechanisms to act. Due to the arrangement, the external power pipe rod conveyor can be used in a well site with an electric hydraulic pump station, can also be used in a well site with a vehicle-mounted hydraulic power source when the electric hydraulic pump station cannot be powered on, and can meet the use requirements of any well site.