CN113738307A - Oil gas downhole multi-point scale taking device and scale taking method thereof - Google Patents
Oil gas downhole multi-point scale taking device and scale taking method thereof Download PDFInfo
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- E21B37/00—Methods or apparatus for cleaning boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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Abstract
The invention discloses an oil gas downhole multi-point scale taking device and a scale taking method thereof, wherein the oil gas downhole multi-point scale taking device comprises a logging truck, a controller and a scale taking device body, wherein the logging truck is electrically connected with the controller; the scale taking device body is positioned in an oil pipe of a shaft and comprises a connecting ring, a first centralizer, a driving mechanism, a scale taking mechanism, a second centralizer and a guide head; the connecting ring is fixedly connected with the top of the first centralizer and is fixedly connected with the logging truck through a logging cable; the connecting ring is fixedly connected with the logging cable; the driving mechanism is connected with the scale taking mechanism; the scale taking mechanism comprises a first connecting disc, a second connecting disc, a sliding rod and a plurality of scale storage mechanisms, the first connecting disc is fixed with the bottom of the shell, and the second connecting disc is positioned at the bottom of the first connecting disc and is fixed at two ends of the sliding rod; a plurality of storage dirt mechanisms are all connected on the slide bar in a sliding mode, the storage dirt mechanisms are used for taking out dirt, and the structure is simple and efficient.
Description
Technical Field
The invention relates to an oil well pipe lower cleaning device, in particular to an oil gas underground multipoint scale taking device and a scale taking method thereof.
Background
In the exploitation of oil and gas fields, the produced fluid is oil, gas, water and mud, the fluid mixture continuously flows in a pipeline, and when certain conditions are reached, a scaling phenomenon can be generated in an oil pipe. For oil and gas wells with high water content, formation water is thermodynamically unstable due to water, water phase ions and inorganic salts in formation liquid are over-saturated and even exceed the solubility of substances, salt scale appears around the well bottom, and the salt scale precipitates under the condition of exceeding a certain pH value. The scaling phenomenon often causes equipment corrosion damage, pipeline blockage and the like, thereby reducing the recovery ratio of oil gas, increasing the production cost, reducing the productivity, increasing the energy consumption, causing the oil gas to be incapable of normally and continuously exploiting, even stopping the production and bringing huge economic loss to an oil-gas field. In addition, due to the fact that the underground scaling mechanism is complex, different blocks, different types of gas wells and different production stages of the gas wells are different in types and characteristics of underground plugs, scale needs to be taken from multiple positions in an oil pipe, and component analysis is carried out on scale samples at different positions, so that scale prevention and removal process technology research and product development are carried out in a targeted mode.
At present, most of the existing underground sampling devices are used for collecting underground fluid samples, the technology is mature, but the scale taking devices for the inner wall of an oil pipe are few, and the technology is not mature enough. Utility model patent CN208918526U discloses a viscous crude is sampling device in pit, and it can gather the fluid sample in the sealed appearance section of thick bamboo. Although the device works stably and is simple to operate, the device cannot finish the operation of taking scales on the inner wall of the oil pipe.
Utility model patent CN206554919U discloses a get dirty instrument in pit, and the device can gather the dirt on the wall of a well more conveniently, but the device gets the dirt operation at every turn and can only get the dirt sample of a certain specific position in the pit, needs the repeated operation when getting the dirt at the multiple spot, expends time.
Therefore, how to provide a multi-point scale removing device and a scale removing method thereof in an oil and gas well so as to overcome the above problems is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides an oil and gas downhole multi-point scale taking device and a scale taking method thereof, which are convenient to operate and high in scale taking efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme: a multi-point scale taking device in an oil gas well comprises a logging truck, a controller and a scale taking device body, wherein the logging truck is electrically connected with the controller; the scale taking device body is positioned in an oil pipe of a shaft and comprises a connecting ring, a first centralizer, a driving mechanism, a scale taking mechanism, a second centralizer and a guide head; the connecting ring is fixedly connected with the top of the first centralizer and is fixedly connected with the logging truck through a logging cable;
the driving mechanism comprises a shell, a first motor, a second motor, a scale taking transmission shaft, a screw rod connecting shaft, a first screw rod and a second screw rod, wherein the top of the shell is fixedly connected with the bottom of the first centralizer; the first motor and the second motor are fixedly positioned in the shell and are electrically connected with the logging truck through logging cables, an output shaft of the first motor is arranged in parallel with and in transmission connection with a lead screw connecting shaft, the end part of an output shaft of the second motor is in transmission connection with a scale taking transmission shaft, the first lead screw is a hollow rod and is in sliding connection with the periphery of the scale taking transmission shaft, the second lead screw is fixed at the bottom end of the lead screw connecting shaft, and the second lead screw is meshed with the first lead screw to drive the first lead screw to axially move;
the scale taking mechanism comprises a first connecting disc, a sliding rod, a second connecting disc and a plurality of scale storage mechanisms, and the first connecting disc is fixed with the bottom of the shell; the top end of the sliding rod is provided with a step part, the second connecting disc is positioned below the first connecting disc and is integrally and fixedly connected with the bottom of the sliding rod, and the first connecting disc is fixed on the step part at the top end of the sliding rod; the scale storage mechanisms on the top layer are fixedly connected with the bottom of the first lead screw to drive the scale storage mechanisms to integrally move up and down, the scale storage mechanisms are connected with the scale storage bin in a sliding manner, and the scale taking transmission shaft extends out of the bottom end of the first lead screw and is in transmission connection with the scale storage bin to drive the scale storage bin to move outwards or inwards along the radial direction of the oil pipe; the second connecting disc is fixedly connected with the top of the second centralizer, and the bottom of the second centralizer is fixedly connected with the guide head.
The invention has the beneficial effects that: the output shaft of the first motor is in transmission connection with the screw rod connecting shaft. The fixed second lead screw in bottom of lead screw connecting axle, the effect drive second lead screw of first motor rotates, the second motor is connected with the transmission of getting the dirty transmission shaft, it is used for driving the storage dirt storehouse of storing up dirty mechanism to get the dirty transmission shaft, realize storing up the radial expansion of dirt storehouse corresponding oil pipe and shrink, and then accomplish the dirt of getting of storing up the dirty storehouse, first lead screw sliding connection is in the periphery of getting the dirty transmission shaft, and with the meshing of second lead screw, under the second lead screw rotation effect, realize shifting up of first lead screw, the bottom fixed connection of first lead screw stores up dirty mechanism, realize storing up the whole of dirty mechanism and shift up, can realize the dirt of getting of different positions, it gets the dirty transmission shaft and the cooperation of the storage dirt mechanism of next floor to get the dirt, it is efficient to get the dirt.
Preferably, the first centralizer and the second centralizer both comprise a main body casing and two connecting pieces, the two ends of the main body sleeve are provided with cannula parts, the connecting pieces are respectively connected with the cannula parts at the two ends, the connecting pieces comprise a bottom plate, a connecting pipe, a transition pipe, a limiting pipe, a spring, a movable hinged disc and a support rod, the middle part of the bottom plate is provided with a wire passing hole, the connecting pipe is fixed at the middle part of the bottom plate, the transition pipe is sleeved and fixed at one end of the periphery of the connecting pipe far away from the bottom plate, the limiting pipe is fixedly sleeved on the periphery of the transition pipe and one end of the limiting pipe far away from the connecting pipe, an annular limiting step is arranged at one end of the limiting pipe far away from the transition pipe, the movable hinge disc is connected on the periphery of the plug pipe part in a sliding manner, one end of the spring is provided with a baffle and is limited in the limiting pipe through an annular limiting step, the spring is positioned on the inner side of the limiting pipe, and one end of the spring is abutted against the baffle; the other end of the spring is abutted against the top pipe, the inserting pipe part is positioned on the inner sides of the limiting pipe and the transition pipe and is fixedly connected with the top pipe, and the spring is positioned on the periphery of the inserting pipe part; one end of each support rod is hinged to the movable hinge disc, the other ends of the two support rods corresponding to the connecting pieces at the two ends of the main casing are hinged, the corresponding hinged part is movably connected with a roller, and the roller is abutted to the side wall of the oil pipe; the bottom plate at the top of the first centralizer is fixedly connected with the connecting ring; the bottom plate at the bottom of the first centralizer is fixedly connected with the top of the shell; the bottom plate at the top of the second centralizer is fixedly connected with the second connecting disc; and the bottom plate at the bottom of the second centralizer is fixedly connected with the guide head.
Preferably, the housing comprises a first motor bin, a second motor bin, a first screw rod protective shell and a second screw rod protective shell, the first motor bin and the second motor bin are both cylindrical, the first motor bin and the second motor bin are separated by a gear box, the second motor bin is positioned at the bottom of the first motor bin, the first motor is positioned in the first motor bin and fixed on the gear box, the second motor is fixed in the second motor bin, the first motor is in transmission connection with a screw rod connecting shaft through the gear box, the first screw rod protective shell is a hollow round tube and fixed at the bottom of the second motor bin, the scale taking transmission shaft and the first screw rod are positioned in the first screw rod protective shell, the second screw rod protective shell is positioned at the bottom of the first screw rod protective shell, and the second screw rod is rotatably positioned in the second screw rod protective shell, the bottoms of the first lead screw protective shell and the second lead screw protective shell are fixedly connected with the first connecting disc.
Preferably, the scale storage mechanism further comprises an annular first cover plate, an annular second cover plate, a connecting column and a scale storage bin main gear, the first cover plate and the second cover plate are fixed through the connecting column, an internal threaded pipe is arranged at the top of the first cover plate, an external threaded pipe is arranged at the bottom of the second cover plate, and the internal threaded pipe of the first cover plate at the top is fixedly connected with the bottom of the first screw rod to drive the scale storage mechanism to move up and down; the internal threaded pipes of the two scale storage mechanisms which are adjacent in the upper and lower positions are correspondingly and fixedly connected with the external threaded pipes; the scale storage bin is connected to the second cover plate in a sliding mode, the scale storage bin main gear rotates to be located on the second cover plate and is in transmission connection with the scale storage bin, and the scale taking transmission shaft is in transmission connection with the scale storage bin main gear to drive the scale storage bin to move.
Preferably, store up the dirt storehouse and be a plurality of and distribute store up the dirt storehouse master gear around, the one end in storage dirt storehouse sets up the guide bar, one side of guide bar sets up tooth portion, tooth portion with store up the meshing of dirt storehouse master gear, all set up a plurality of guide blocks on first apron and the second apron, the guide block with store up the radial expansion and the shrink in dirt storehouse of lateral wall butt direction in dirt storehouse.
Preferably, gear positioning lugs are arranged at the bottom of the middle of the first cover plate and the top of the middle of the second cover plate, the gear positioning lugs are respectively embedded at the two ends of the scale storage bin main gear, a limiting block is fixedly arranged at the middle of the inner peripheral side wall of the scale storage bin main gear, the limiting block is in matched abutting joint with the outer side wall of the scale taking transmission shaft, a limiting key groove penetrating through the two ends of the limiting block is arranged on the limiting block, a key block is arranged on the scale taking transmission shaft, and the key block is correspondingly clamped in the limiting key groove to drive the scale storage bin main gear to rotate; and a notch passing through the key block is reserved on the gear positioning lug.
Preferably, the first motor and the second motor are both servo motors, the controller is electrically connected with the first motor and the second motor through the logging cable, the controller controls the working states of the first motor and the second motor and determines the upward moving or downward moving distance of the first screw rod through the number of rotation turns of the second screw rod.
Preferably, a main gear and a driven gear are rotationally connected in the gear box, the main gear is meshed with the driven gear, the main gear is in key connection with an output shaft of the first motor, and the driven gear is in key connection with the screw rod connecting shaft.
Preferably, the ratio of the axial dimension of the first lead screw protective shell to the axial dimension of the first lead screw is 1.5-2, and the top of the first lead screw is flush with the top of the second lead screw.
The invention also discloses a scale taking method of the oil-gas downhole multi-point scale taking device, which comprises the following steps:
step one; sequentially splicing and assembling the connecting ring, the first centralizer, the driving mechanism, the scale taking mechanism, the second centralizer and the guide head from top to bottom, and electrically connecting and debugging the logging cable and the driving mechanism;
step two: putting the assembled scale taking mechanism into the oil pipe, so that the scale taking mechanism is positioned at a first scale taking position;
step three; the controller is opened, the second motor is started to operate, the scale storage bin of the scale storage mechanism is driven by the scale taking transmission shaft to move and expand to be in full contact with the dirt on the inner wall of the oil pipe, the scale mechanism is slowly taken up by the logging cable, so that the scale storage bin cuts the dirt on the inner wall of the oil pipe, and the dirt falls into the scale storage bin under the action of gravity; the scale taking transmission shaft is matched with the scale storage mechanism on the next layer;
step four; lifting the device to a second scale taking position, and repeating the operation of the third step;
step five; and the taking-out devices are used for respectively storing the scales in the scale storage mechanisms to finish the scale taking-out process.
Drawings
FIG. 1 is an overall schematic view of a multi-point scale removal device for an oil and gas well according to the present invention;
FIG. 2 is a schematic view of a scale remover body of the oil and gas downhole multi-point scale removing device of the invention;
FIG. 3 is an isometric view and a partial schematic view of a drive mechanism of a multi-point scale removal device in an oil and gas well according to the present invention;
FIG. 4 is a schematic cross-sectional view of an A-A multi-point scale removal device for an oil and gas well according to the present invention;
FIG. 5 is a schematic cross-sectional view of a multi-point scale removal device B-B for an oil and gas well according to the present invention;
FIG. 6 is a schematic cross-sectional view of a C-C multi-point scale removal device for an oil and gas downhole according to the present invention;
FIG. 7 is an isometric view and a partial schematic view of a scale taking mechanism of the oil and gas downhole multi-point scale taking device of the invention;
FIG. 8 is a schematic cross-sectional view of a multi-point scale removal device D-D in an oil and gas well according to the present invention;
FIG. 9 is a partial structural view of a first cover plate of the oil and gas downhole multi-point scale removal device of the present invention;
FIG. 10 is a partial structural view of a second cover plate of the oil and gas downhole multi-point scale removal device of the invention;
FIG. 11 is a schematic view of a scale-removing transmission shaft and a scale-storing bin main gear of the oil and gas downhole multi-point scale-removing device according to the present invention;
FIG. 12 is a schematic structural diagram of a first centralizer or a second centralizer of the oil and gas downhole multi-point scale removal device;
FIG. 13 is an enlarged schematic view of an oil and gas downhole multi-point scale removal device E of the present invention.
1 logging truck, 2 controller, 3 scale taking device body, 31 connecting ring, 32 first centralizer, 321 bottom plate, 322 connecting pipe, 323 transition pipe, 324 limit pipe, 325 spring, 326 movable hinged disc, 3261 baffle, 327 support rod, 33 driving mechanism, 331 shell, 3311 first motor cabin, 3312 second motor cabin, 3313 first lead screw protective shell, 3314 second lead screw protective shell, 332 first motor, 3321 first motor shaft, 333 second motor, 3331 second motor shaft, 334 scale taking transmission shaft, 335 lead screw connecting shaft, 336 first lead screw, 337 second lead screw, 34 scale taking mechanism, 341 first connecting disc, 342 second connecting disc, 343 sliding rod, 344 scale storing mechanism, 3441 first cover plate, 3442 second cover plate, 3443, 3444 scale storing cabin, 3445 scale storing cabin main gear, 35 second centralizer, 36 roller wheel, 4, 5 internal threaded pipe, 6 external threaded pipe, 7 guide block, 8 gear positioning lug, 8 gear positioning block, and guide head, 9 limiting blocks, 91 limiting key grooves, 10 inserting pipes, 11 logging cables, 12 gear boxes, 121 main gears, 122 driven gears, 13 mineshafts, 14 oil pipes, 15 ground pulleys, 16 day pulleys, 17 blowout preventers, 18 second motor main gears and 19 second motor driven gears.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to the attached drawings 1 to 13 of the invention, the oil and gas downhole multi-point scale taking device comprises a logging truck 1, a controller 2 and a scale taking device body 3, wherein the logging truck 1 is electrically connected with the controller 2; the scale taking device body 3 is positioned in an oil pipe 14 of a shaft 13 and comprises a connecting ring 31, a first centralizer 32, a driving mechanism 33, a scale taking mechanism 34, a second centralizer 35 and a guide head 36; the connecting ring 31 is fixedly connected with the top of the first centralizer and is fixedly connected with the logging truck through the logging cable 11;
the driving mechanism 33 comprises a housing 331, a first motor 332, a second motor 333, a scale taking transmission shaft 334, a screw rod connecting shaft 335, a first screw rod 336 and a second screw rod 337, wherein the top of the housing 331 is fixedly connected with the bottom of the first centralizer 32; the first motor 332 and the second motor 333 are fixedly positioned in the shell and are electrically connected with the logging truck through logging cables, an output shaft of the first motor 332 is arranged in parallel with and in transmission connection with a screw rod connecting shaft, the end part of an output shaft of the second motor 333 is in transmission connection with a scale taking transmission shaft, the first screw rod 336 is a hollow rod and is in sliding connection with the periphery of the scale taking transmission shaft 334, the second screw rod 337 is fixed at the bottom end of the screw rod connecting shaft 335, the second screw rod 337 is meshed with the first screw rod 336, and the rotation of the second screw rod is converted into the axial movement of the first screw rod;
the scale taking mechanism 34 comprises a first connecting disc 341, a second connecting disc 342, a sliding rod 343 and a plurality of scale storage mechanisms 344, the first connecting disc 341 is fixed with the bottom of the shell, a step part is arranged at the top end of the sliding rod 343, the second connecting disc 342 is positioned below the first connecting disc 341 and fixed at the bottom of the sliding rod, and the first connecting disc is fixed at the step part at the top end of the sliding rod 343; the scale storage mechanisms are fixedly connected in an up-and-down layered mode and are all connected onto the sliding rod 343 in a sliding mode, the scale storage mechanism on the top layer is fixedly connected with the bottom of the first screw rod to drive the scale storage mechanisms to integrally move up and down, the scale taking mechanism is connected with the scale storage bin 3444 in a sliding mode, the scale taking transmission shaft 334 extends out of the bottom end of the first screw rod and is connected with the scale storage bin 3444 in a transmission mode to drive the scale storage bin to move outwards to expand or move inwards to contract along the radial direction of the oil pipe; the second connecting plate 342 is fixedly connected with the top of the second centralizer 35, and the bottom of the second centralizer 35 is fixedly connected with the guide head 36.
When the device is used, the scale storage mechanism of each layer independently acts to take scales, and the scale taking transmission shaft is in transmission fit with the scale storage mechanism of the corresponding layer to drive the scale storage bin to expand and contract towards the side wall of the oil pipe.
Specifically, the bottom of the shell is provided with a second motor main gear 18 and a second motor driven gear 19, the second motor main gear is matched with a second motor shaft, and the second motor driven gear is fixedly connected with the scale taking transmission shaft and transmits the output power of the second motor shaft to the scale taking transmission shaft.
In some embodiments, each of the first centralizer 32 and the second centralizer 35 includes a main casing and two connectors, the main casing has two insertion tube portions 10 at two ends, the connectors are respectively connected to the insertion tube portions at two ends, each connector includes a bottom plate 321, a connecting tube 322, a transition tube 323, a limiting tube 324, a spring 325, a movable hinge plate 326 and a support rod 327, the bottom plate 321 has a wire passing hole at a middle portion thereof, the connecting tube 322 is fixed at the middle portion thereof, the transition tube 323 is fixedly sleeved at an end of the periphery of the connecting tube 322 away from the bottom plate, the limiting tube 324 is fixedly sleeved at the periphery of the transition tube 323 and away from the connecting tube, an annular limiting step is provided at an end of the limiting tube 324 away from the transition tube, the movable hinge plate 326 is slidably connected to the periphery of the insertion tube portion, one end of the limiting tube is provided with a baffle 3261 and is limited in the limiting tube 324 through an annular limiting step, the spring 325 is positioned on the inner side of the limiting tube 324, and one end of the spring is abutted against the baffle; the other end is abutted against the top pipe, the cannula part 10 is positioned at the inner sides of the limiting pipe 324 and the transition pipe 323 and is fixedly connected with the top pipe, and the spring 325 is positioned at the periphery of the cannula part 10; one end of the stay bar 327 is hinged on the movable hinged disk 326, the other ends of the two stay bars 327 corresponding to the connecting pieces at the two ends of the main casing are hinged, the corresponding hinged part is movably connected with a roller 4, and the roller is abutted against the side wall of the oil pipe 14; the bottom plate at the top of the first centralizer is fixedly connected with the connecting ring 31; the bottom plate at the bottom of the first centralizer is fixedly connected with the top of the shell 331; the bottom plate at the top of the second centralizer is fixedly connected with a second connecting disc 342; the bottom plate at the bottom of the second centralizer is fixedly connected with the guide head 36. The first centralizer and the second centralizer play a guiding role. Specifically, tubing 14 is positioned within wellbore 13.
In other embodiments, the housing 331 includes a first motor chamber 3311, a second motor chamber 3312, a first screw rod protection housing 3313, and a second screw rod protection housing 3314, the first motor chamber 3311 and the second motor chamber 3312 are both cylindrical, the first motor chamber 3311 and the second motor chamber 3312 are separated and separated by a gear box 12, the second motor chamber is located at the bottom of the first motor chamber, a first motor 332 is located in the first motor chamber 3311 and fixed on the gear box 12, a second motor 333 is fixed in the second motor chamber, the first motor 332 is in transmission connection with the screw rod connecting shaft through the gear box, the first screw rod protection housing 3313 is a hollow circular tube and fixed at the bottom of the second motor chamber 3312, the scale-removing transmission shaft 334 and the first screw rod 336 are located in the first screw rod protection housing 3313, the second screw rod protection housing 3314 is located at the bottom of the first screw rod 3313, the second screw rod protection housing 3314 is located in the second protection housing, the first lead screw protective shell is communicated with the second lead screw protective shell, and the bottom of the first lead screw protective shell is fixedly connected with the first connecting disc.
Specifically, the scale storage mechanism 344 further comprises an annular first cover plate 3441, a second cover plate 3442, a connecting column 3443 and a scale storage bin main gear 3445, the first cover plate and the second cover plate are fixed by the connecting column, an internal threaded pipe 5 is arranged at the top of the first cover plate 3441, an external threaded pipe 6 is arranged at the bottom of the second cover plate 3442, and the internal threaded pipe of the first cover plate 3441 at the top is fixedly connected with the bottom of the first screw rod 336 to drive the scale storage mechanism to move up and down; the internal threaded pipes of the two scale storage mechanisms 344 which are adjacent at the upper and lower positions are correspondingly and fixedly connected with the external threaded pipes; the scale storage bin 3444 is slidably connected to the second cover plate 3442, the scale storage bin main gear 3445 is rotatably disposed on the second cover plate and is in transmission connection with the scale storage bin 3444, and the scale taking transmission shaft 334 is in transmission connection with the scale storage bin main gear 3445 to drive the scale storage bin to move.
More specifically, the plurality of scale storage chambers 3444 are distributed around the scale storage chamber main gear 3445, one end of the scale storage chamber 3444 is provided with a guide rod, one side of the guide rod is provided with a tooth portion, the tooth portion is engaged with the scale storage chamber main gear 3445, the first cover plate 3441 and the second cover plate 3442 are both provided with a plurality of guide blocks 7, and the guide blocks 7 are abutted against the outer side wall of the scale storage chamber 3444 to guide the radial expansion and contraction of the scale storage chamber.
In other embodiments, gear positioning bumps 8 are respectively arranged at the middle bottom of the first cover plate 3441 and the middle top of the second cover plate, the gear positioning bumps 8 are respectively embedded at two ends of the scale storage bin main gear 3445, a limiting block 9 is fixedly arranged at the middle of the inner peripheral side wall of the scale storage bin main gear 3445, the limiting block 9 is in encircling abutting contact with the outer side wall of the scale taking transmission shaft, a limiting key groove 91 penetrating through two ends of the limiting block is arranged on the limiting block 9, a key block is arranged on the scale taking transmission shaft 334, and the key block is correspondingly clamped in the limiting key groove 91 to drive the scale storage bin main gear 3445 to rotate; and a notch for passing through the key block is reserved on the gear positioning convex block 8.
Step parts are arranged at two ends of the connecting column and two ends of the sliding rod, so that the connecting column and the sliding rod are convenient to limit and fix.
In other embodiments, the first motor 332 and the second motor 333 are both servo motors, the controller 2 is electrically connected to the first motor and the second motor through the logging cable 11, and the controller 2 controls the operating states of the first motor and the second motor and determines the upward movement or downward movement distance of the first lead screw according to the number of turns of the second lead screw.
In other embodiments, a main gear 121 and a driven gear 122 are rotatably connected in the gearbox 12, the main gear 121 is engaged with the driven gear, the main gear 121 is keyed to an output shaft of the first motor 332, and the driven gear 122 is keyed to the lead screw connecting shaft 335.
Specifically, the ratio of the axial dimension of the first lead screw protective shell 3313 to the axial dimension of the first lead screw is 2, and the top of the first lead screw 336 is flush with the top of the second lead screw 337.
When in use, the top of the first screw rod 336 is level with the top of the second screw rod 337 and corresponds to the starting position, the scale taking transmission shaft is positioned in the scale taking mechanism at the top, the scale taking transmission shaft is in matched transmission with the scale storage chamber main gear to realize the expansion and contraction of the scale storage chamber, after the previous scale taking task is completed, the next scale taking mechanism works, at the moment, the first motor drives the second screw rod to rotate, the second screw rod is meshed with the first screw rod to drive the first screw rod to move upwards, at the moment, the first screw rod only moves upwards and downwards and does not rotate circumferentially, when the scale taking transmission shaft is matched with the next scale storage mechanism, the second motor is started to drive the next scale storage mechanism to operate and take scale, because each scale storage mechanism is provided with a notch through which the scale taking transmission shaft and the key block pass, when the key block is aligned with the notch at the upper and lower positions, the scale taking transmission shaft can smoothly reach the scale storage chamber main gear at the corresponding layer, the multi-layer scale storage mechanism can move up and down relative to the scale taking transmission shaft. The scale taking transmission shaft is only provided with one key block, and when the key block corresponds to the limit key groove of the main gear of the scale storage bin, the corresponding layer of scale storage mechanisms can be driven to move to realize expansion and contraction. Therefore, the scale taking mechanism can sequentially finish the scale taking and can finish the scale taking tasks at multiple points and different positions.
In addition, the invention also discloses a scale taking method of the oil-gas downhole multi-point scale taking device, which comprises the following steps: step one; sequentially splicing and assembling the connecting ring, the first centralizer, the driving mechanism, the scale taking mechanism, the second centralizer and the guide head from top to bottom, and electrically connecting and debugging the logging cable and the driving mechanism; the anti-blowout device is used by matching with a ground pulley 15, a top pulley 16 and a blowout preventer 17.
Step two: putting the assembled scale taking mechanism into the oil pipe, so that the scale taking mechanism is positioned at a first scale taking position;
step three; the controller is opened, the second motor is started to operate, the scale storage bin of the scale storage mechanism is driven by the scale taking transmission shaft to move and expand to be in full contact with the dirt on the inner wall of the oil pipe, the scale mechanism is slowly taken up by the logging cable, so that the scale storage bin cuts the dirt on the inner wall of the oil pipe, and the dirt falls into the scale storage bin under the action of gravity; the scale taking transmission shaft is matched with the scale storage mechanism on the next layer;
step four; lifting the device to a second scale taking position, and repeating the operation of the third step;
step five; and the taking-out devices are used for respectively storing the scales in the scale storage mechanisms to finish the scale taking-out process.
For the device and the application method disclosed by the embodiment, the description is relatively simple because the device and the application method correspond to the method disclosed by the embodiment, and the relevant points can be referred to the description of the method part.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The oil gas underground multipoint scale taking device is characterized by comprising a logging truck (1), a controller (2) and a scale taking device body (3), wherein the logging truck (1) is electrically connected with the controller (2); the scale taking device body (3) is positioned in an oil pipe (14) of a shaft (13) and comprises a connecting ring (31), a first centralizer (32), a driving mechanism (33), a scale taking mechanism (34), a second centralizer (35) and a guide head (36); the connecting ring (31) is fixedly connected with the top of the first centralizer (32) and is fixedly connected with the logging truck through the logging cable (11);
the driving mechanism (33) comprises a shell (331), a first motor (332), a second motor (333), a scale taking transmission shaft (334), a screw rod connecting shaft (335), a first screw rod (336) and a second screw rod (337), and the top of the shell (331) is fixedly connected with the bottom of the first centralizer (32); the first motor (332) and the second motor (333) are fixedly positioned in the shell and are electrically connected with a logging truck through logging cables, an output shaft of the first motor (332) is arranged in parallel with the screw rod connecting shaft (335) and is in transmission connection with the screw rod connecting shaft, the end part of an output shaft of the second motor (333) is in transmission connection with the scale taking transmission shaft (334), the first screw rod (336) is a hollow rod and is connected to the periphery of the scale taking transmission shaft (334) in a sliding manner, the second screw rod (337) is fixed to the bottom end of the screw rod connecting shaft (335), and the second screw rod (337) is meshed with the first screw rod (336) and drives the first screw rod (336) to move axially;
the scale taking mechanism (34) comprises a first connecting disc (341), a sliding rod (343), a second connecting disc (342) and a plurality of scale storage mechanisms (344), and the first connecting disc (341) is fixed with the bottom of the shell (331); a step part is arranged at the top end of the sliding rod (343), and the second connecting disc (342) is positioned below the first connecting disc (341) and is integrally and fixedly connected with the bottom of the sliding rod; the first connecting disc is fixed on a step part at the top end of the sliding rod (343); the scale storage mechanisms (344) are fixedly connected in an up-and-down layered mode and are all connected to the sliding rod (343) in a sliding mode, the scale storage mechanism on the top layer is fixedly connected with the bottom of the first screw rod (336) to drive the scale storage mechanisms (344) to integrally move up and down, and the scale storage mechanism is connected with a scale storage bin (3444) in a sliding mode; the scale taking transmission shaft (334) extends out of the bottom end of the first screw rod and is in transmission connection with the scale storage bin (3444) to drive the scale storage bin (3444) to move outwards or inwards along the radial direction of the oil pipe; the second connecting disc (342) is fixedly connected with the top of the second centralizer (35), and the bottom of the second centralizer (35) is fixedly connected with the guide head (36).
2. The oil and gas downhole multi-point scale taking device according to claim 1, wherein each of the first centralizer (32) and the second centralizer (35) comprises a main casing and two connectors, the two ends of the main casing are provided with insertion pipe portions (10), the connectors are respectively connected with the insertion pipe portions at the two ends, each connector comprises a bottom plate (321), a connecting pipe (322), a transition pipe (323), a limiting pipe (324), a spring (325), a movable hinged disc (326) and a support rod (327), the middle of the bottom plate (321) is provided with a line passing hole, the connecting pipe (322) is fixed at the middle of the bottom plate, the transition pipe (323) is fixedly sleeved at one end of the periphery of the connecting pipe (322) far away from the bottom plate, the limiting pipe (324) is fixedly sleeved at the periphery of the transition pipe (323) and at one end of the limiting pipe (324) far away from the transition pipe, an annular limiting step is arranged at one end of the limiting pipe (324) far away from the transition pipe, the movable hinged disc (326) is connected to the periphery of the plug-in pipe part in a sliding mode, a baffle plate (3261) is arranged at one end of the movable hinged disc and limited inside the limiting pipe (324) through an annular limiting step, the spring (325) is located on the inner side of the limiting pipe (324), and one end of the spring is abutted to the baffle plate; the other end of the plug pipe is abutted against a top pipe, the plug pipe part (10) is positioned on the inner sides of the limiting pipe (324) and the transition pipe (323) and is fixedly connected with the top pipe, and the spring (325) is positioned on the periphery of the plug pipe part (10); one end of each supporting rod (327) is hinged to the movable hinged disc (326), the other ends of the two supporting rods (327) corresponding to the connecting pieces at the two ends of the main casing are hinged, the corresponding hinged part is movably connected with a roller (4), and the roller is abutted to the side wall of the oil pipe (14); the bottom plate at the top of the first centralizer is fixedly connected with the connecting ring (31); the bottom plate at the bottom of the first centralizer is fixedly connected with the top of the shell (331); the bottom plate at the top of the second centralizer is fixedly connected with the second connecting disc (342); the bottom plate at the bottom of the second centralizer is fixedly connected with the guide head (36).
3. The multi-point scale removing device for oil and gas downhole according to claim 2, wherein the casing (331) comprises a first motor chamber (3311), a second motor chamber (3312), a first screw rod protection casing (3313) and a second screw rod protection casing (3314), the first motor chamber (3311) and the second motor chamber (3312) are both cylindrical, the first motor chamber (3311) and the second motor chamber (3312) are separated by a gear box (12), the second motor chamber (3312) is located at the bottom of the first motor chamber, the first motor (332) is located in the first motor chamber (3311) and fixed on the gear box (33112), the second motor (333) is fixed in the second motor chamber, the first motor (332) is in transmission connection with a screw rod through the gear box, the first screw rod protection casing (3313) is a hollow circular tube, it is fixed the bottom in second motor storehouse (3312), it is located to get dirty transmission shaft (334) and first lead screw (336) first lead screw protective housing (3313) is interior, second lead screw protective housing (3314) is located the bottom of first lead screw protective housing (3313), the second lead screw rotates to be located in second lead screw protective housing (3314), first lead screw protective housing (3313) and second lead screw protective housing (3314) intercommunication and its bottom all with first connecting disc (341) fixed connection.
4. The oil and gas downhole multi-point scale taking device as claimed in claim 3, wherein the scale storage mechanism (344) further comprises a first annular cover plate (3441), a second annular cover plate (3442), a connecting column (3443) and a scale storage bin main gear (3445), the first cover plate and the second cover plate are fixed through the connecting column, an internal threaded pipe (5) is arranged at the top of the first cover plate (3441), an external threaded pipe (6) is arranged at the bottom of the second cover plate (3442), and the internal threaded pipe of the first cover plate (3441) at the top is fixedly connected with the bottom of the first screw rod (336) to drive the scale storage mechanism to move up and down; the internal thread pipes of the two scale storage mechanisms (344) which are adjacent at the upper and lower positions are correspondingly and fixedly connected with the external thread pipes; the scale storage bin (3444) is connected to the second cover plate (3442) in a sliding manner, the scale storage bin main gear (3445) is rotatably arranged on the second cover plate (3442) and is in transmission connection with the scale storage bin (3444), and the scale taking transmission shaft (334) is in transmission connection with the scale storage bin main gear (3445) to drive the scale storage bin to move.
5. The oil and gas downhole multi-point scale taking device according to claim 4, wherein the scale storage bin (3444) is multiple and distributed around the scale storage bin main gear (3445), one end of the scale storage bin (3444) is provided with a guide rod, one side of the guide rod is provided with a tooth part which is meshed with the scale storage bin main gear (3445), the first cover plate (3441) and the second cover plate (3442) are respectively provided with a plurality of guide blocks (7), and the guide blocks (7) and the outer side wall of the scale storage bin (3444) are abutted to guide radial expansion and contraction of the scale storage bin.
6. The oil and gas downhole multi-point scale removal device according to claim 5, wherein annular gear positioning protrusions (8) are respectively arranged at the middle bottom of the first cover plate (3441) and the middle top of the second cover plate, the gear positioning protrusions (8) are respectively embedded at two ends of the scale storage bin main gear (3445), a limiting block (9) is fixedly arranged at the middle of the inner peripheral side wall of the scale storage bin main gear (3445), the limiting block (9) is in fit abutment with the outer side wall of the scale removal transmission shaft, a limiting key groove (91) penetrating through two ends of the limiting block is arranged on the limiting block (9), a key block is arranged on the scale removal transmission shaft (334), and the key block is correspondingly clamped in the limiting key groove (91) to drive the scale storage bin main gear (3445) to rotate; and a notch passing through the key block is reserved on the gear positioning convex block (8).
7. The multi-point scale taking device for oil and gas downhole according to claim 6, wherein the first motor (332) and the second motor (333) are both servo motors, the controller (2) is electrically connected with the first motor and the second motor through the logging cable (11), the controller (2) controls the working state of the first motor and the second motor, and the moving-up or moving-down distance of the first screw rod is determined through the number of rotation turns of the second screw rod.
8. A multi-point scale removal device for oil and gas downhole according to claim 7, wherein a main gear (121) and a driven gear (122) are rotatably connected in the gearbox (12), the main gear (121) is engaged with the driven gear, the main gear (121) is in key connection with the output shaft of the first motor (332), and the driven gear (122) is in key connection with the lead screw connecting shaft (335).
9. The multi-point scale removal device for oil and gas downhole according to claim 8, wherein the ratio of the axial dimension of the first screw rod protective shell (3313) to the axial dimension of the first screw rod is 1.5-2, and the top of the first screw rod (336) is flush with the top of the second screw rod (337).
10. A method for taking scale of a multi-point scale taking device in a hydrocarbon well as defined in any one of claims 1 to 9, comprising the following steps:
step one; sequentially splicing and assembling the connecting ring, the first centralizer, the driving mechanism, the scale taking mechanism, the second centralizer and the guide head from top to bottom, and electrically connecting and debugging the logging cable and the driving mechanism;
step two: putting the assembled scale taking mechanism into the oil pipe, so that the scale taking mechanism is positioned at a first scale taking position;
step three; the controller is opened, the second motor is started to operate, the scale storage bin of the scale storage mechanism is driven by the scale taking transmission shaft to move and expand to be in full contact with the dirt on the inner wall of the oil pipe, the scale mechanism is slowly taken up by the logging cable, so that the scale storage bin cuts the dirt on the inner wall of the oil pipe, and the dirt falls into the scale storage bin under the action of gravity; the scale taking transmission shaft is matched with the scale storage mechanism on the next layer;
step four; lifting the device to a second scale taking position, and repeating the operation of the third step;
step five; and the taking-out devices are used for respectively storing the scales in the scale storage mechanisms to finish the scale taking-out process.
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| CN202110964985.XA CN113738307B (en) | 2021-08-20 | 2021-08-20 | Oil gas downhole multi-point scale taking device and scale taking method thereof |
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| US4558738A (en) * | 1984-04-02 | 1985-12-17 | Howard Sr Robert G | Oil well casing scraper |
| CN2444056Y (en) * | 2000-09-22 | 2001-08-22 | 中国石油天然气股份有限公司 | Oil well casing scale scraping knife tool |
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