CN115263234B - Pressure-controlled underground switch bridge plug - Google Patents
Pressure-controlled underground switch bridge plug Download PDFInfo
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- CN115263234B CN115263234B CN202211048747.5A CN202211048747A CN115263234B CN 115263234 B CN115263234 B CN 115263234B CN 202211048747 A CN202211048747 A CN 202211048747A CN 115263234 B CN115263234 B CN 115263234B
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- valve body
- upper valve
- pressure
- anchoring sleeve
- rod
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/134—Bridging plugs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention relates to the technical field of petroleum and natural gas exploration exploitation wellbores, in particular to a pressure-controlled underground switch bridge plug, which comprises: the device comprises an upper valve body, a lower valve body, an anchoring sleeve, a blocking plate, a pressure controller, a magnetic induction sensor, a magnetic block and a judging module, wherein the upper valve body comprises an upper valve body fixing assembly, an upper valve body sliding assembly and an elastic piece. According to the invention, the magnetic sensor and the pressure controller are arranged, after the anchoring sleeve is unfolded in place, the blocking plate is retracted, so that the upper valve body sliding assembly can move downwards under the action of top hydraulic pressure, after the top pressure is removed, the upper valve body sliding assembly can rotate upwards under the drive of the elastic piece, and the upper valve body and the lower valve body can be opened for a plurality of times by applying hydraulic pressure to the upper valve body sliding assembly.
Description
Technical Field
The invention relates to the technical field of petroleum and natural gas exploration exploitation wellbores, in particular to a pressure-controlled underground switch bridge plug.
Background
In recent years, the exploration and development of shale oil and gas in China are under way, the reserve scale is rapidly increased, shale gas is the main material in the Chou region, and shale oil is taken into account; the Daqing gulon exploration area is mainly composed of shale oil, and the shale oil contains dissolved gas (gas-liquid ratio is 300-1000) and is listed as a national shale oil development demonstration area. Whether shale oil or shale gas, even compact oil gas, large-scale volumetric fracturing of a long horizontal section horizontal well is currently the most effective development means of low-permeability and ultra-low-permeability oil and gas reservoirs of compact oil and shale oil, the zip-type volumetric fracturing of the horizontal well with the horizontal section length of 1500-5000m is carried out, the cluster of the fracturing section is between 30-100 sections, and the liquid amount reaches 5-12 ten thousand m of single well 3 . Because of large amount of injected stratum liquid and nano-level pore penetration condition of compact oil and shale oil layer, wellhead pressure in the post-pressure drainage and extraction stage is kept at 35-5MPa, and the wellhead high pressure is an underground operation zone for drainage and extractionThe high cost and low efficiency of the existing wellhead pressurized operation process is difficult and intolerable to oilfield managers.
Chinese patent publication No.: CN110145270B. A bridge plug is disclosed. Comprising the following steps: the front end of the central tube is provided with a tube head section, and the center of the tube head section is concaved inwards to form a sliding hole; the periphery of the tube head section is provided with a plurality of sliding grooves distributed along the circumferential direction; the bottom surface of the chute is an outward sliding inclined surface; the end piece comprises a front end part and a rear sliding shaft part; the sliding shaft part is matched in the sliding hole of the central tube in an axial sliding way; the slip sheets are radially arranged on the outer side of the end head, and the slip sheets are radially arranged on the inner side of the end head. Therefore, most of the current downhole switching sliding sleeve tools can only switch the well once, and are unfavorable for downhole resource collection.
Disclosure of Invention
Therefore, the invention provides a voltage-controlled underground switch bridge plug, which is used for solving the problem that most underground switch sliding sleeve tools in the prior art can only switch a well once, and are not beneficial to underground resource collection.
To achieve the above object, the present invention provides a voltage controlled downhole switching bridge plug, comprising,
the upper valve body comprises an upper valve body fixing assembly and an upper valve body sliding assembly, the upper valve body sliding assembly can horizontally rotate and can stretch in the vertical direction, and an elastic piece is arranged between the upper valve body fixing assembly and the upper valve body sliding assembly;
the lower valve body is arranged below the bridge plug upper valve body, the upper end of the lower valve body is arranged in the lower end of the upper valve body, a fixed plate is arranged on the lower valve body, and a through hole is formed in the fixed plate;
the anchoring sleeve is arranged between the upper valve body and the lower valve body and sleeved on the periphery of the bottom of the upper valve body; the surface of the anchoring sleeve is provided with regularly arranged diamond anchoring teeth;
a blocking plate arranged on the upper valve body for preventing the upper valve body sliding component from extending, wherein the blocking plate is provided with a rotary switch;
the pressure controller is arranged at the top end of the joint of the upper valve body and the anchoring sleeve and is positioned on the upper valve body;
the magnetic induction sensor is arranged at the bottom of the anchoring sleeve;
the magnetic block is arranged at the bottom end of the upper valve body;
the judging module is respectively connected with the pressure controller, the magnetic induction sensor and the rotary switch and is used for judging whether the anchoring sleeve is unfolded in place or not;
the upper valve body can move downwards under the action of hydraulic pressure, the anchoring sleeve is outwards propped up while moving, the blocking plate is retracted after the anchoring sleeve is propped up in place, the upper valve body sliding assembly moves downwards under the action of hydraulic pressure, meanwhile, the elastic piece stretches, and when the bottom end of the upper valve body sliding assembly is attached to the fixing plate, the upper valve body and the lower valve body are closed; when the hydraulic pressure of the upper valve body is removed, the elastic piece contracts and drives the upper valve body sliding assembly to move upwards, and the upper valve body and the lower valve body are opened.
Further, the upper valve body fixing assembly comprises,
the outer wall of the lower half part of the upper valve body is an inclined plane and is contacted with the inner surface of the anchoring sleeve;
the sleeve is arranged in the upper valve body main body and is connected with the upper valve body main body through a fixed connecting rod, and a plane bearing is arranged at the bottom end of the sleeve; the blocking plate is arranged at the bottom end of the sleeve;
the top end of the upper valve body main body is provided with an elastic piece groove, an elastic piece is arranged in the elastic piece groove, and the elastic piece is a spring arranged circumferentially.
Further, the upper valve body sliding assembly comprises,
the rotating plate is arranged at the bottom of the upper valve body sliding assembly and is provided with a diversion hole which is obliquely arranged;
the telescopic rod is arranged above the rotating plate, and the bottom end of the telescopic rod is fixedly connected with the rotating plate; the telescopic rod is divided into a first rod body and a second rod body, wherein a cavity is formed in the first rod body and sleeved outside the second rod body, and the second rod body can move up and down along the direction of the cavity; the second rod body is provided with a limiting groove and a limiting block, the limiting groove can limit the first rod body and the second rod body to rotate relatively, and the limiting block can limit the second rod body to move up and down;
and the rotating rod is arranged at the top end of the telescopic rod and is connected with the elastic piece.
Further, when the bridge plug works for the first time, the ground pump injects water into the well body, the upper valve body sliding assembly moves downwards under the action of hydraulic pressure, the blocking plate prevents the telescopic rod from extending, the upper valve body sliding assembly drives the upper valve body to move downwards integrally and outwards to prop up the anchoring sleeve, the pressure controller detects the pressure received in the process of prop up the anchoring sleeve, the magnetic induction sensor detects the sensed magnetic force to judge whether the anchoring sleeve is prop up in place, and after the anchoring sleeve is prop up in place, the blocking plate is retracted.
Further, two whether the anchoring sleeve is in-place or not is judged according to a first stretching standard and a second stretching standard;
the evaluation module can select any one of the first stretching standard and the second stretching standard to judge whether the anchoring sleeve is stretched in place, and can also select the first stretching standard and the second stretching standard simultaneously to judge whether the anchoring sleeve is stretched in place.
Further, when the first distraction criteria is used to evaluate whether the anchor sheath is distracted in place,
the pressure controller detects the pressure F born by the pressure controller in real time and transmits the detection result to the evaluation module, the evaluation module is internally provided with a pressure evaluation parameter Fp, the evaluation module compares the pressure F with the evaluation parameter Fp,
when F is smaller than Fp, the evaluation module judges that the detected pressure is smaller than a preset value, and the anchoring sleeve is not unfolded in place;
when F is more than or equal to Fp, the evaluation module judges that the detected pressure reaches a preset value, the anchoring sleeve is unfolded in place, the evaluation module controls the rotary switch to rotate, and the blocking plate is retracted.
Further, when the second distraction criteria is used to evaluate whether the anchor sheath is distracted in place,
the magnetic induction sensor detects the magnetic induction intensity W in real time and transmits the detection result to the evaluation module, the evaluation module is internally provided with a magnetic induction intensity evaluation parameter Wp, the evaluation module compares the magnetic induction intensity W with the evaluation parameter Wp,
when W is smaller than Wp, the evaluation module judges that the detected magnetic induction intensity is smaller than a preset value, and the anchoring sleeve is not stretched in place;
when W is more than or equal to Wp, the evaluation module judges that the detected magnetic induction intensity reaches a preset value, the anchoring sleeve is unfolded in place, the evaluation module controls the rotation switch to rotate, and the blocking plate is folded.
Further, when the blocking plate is retracted, the rotating plate moves downwards under the action of pressure, in the moving process, the telescopic rod stretches, the rotating plate drives the telescopic rod and the rotating rod to rotate, the rotating rod drives the elastic piece to stretch, when the rotating plate moves downwards to the top end of the fixed plate, and the lower surface of the rotating plate is attached to the upper surface of the fixed plate, the through hole arranged on the fixed plate is located at a dislocation position with the diversion hole of the rotating plate, and the upper valve body and the lower valve body are closed.
Further, when the ground pump is closed, after pressure is released in the well body, the elastic piece contracts to drive the telescopic rod to rotate with the rotary rod, the rotary rod moves upwards, and the upper valve body and the lower valve body are opened.
Further, the fixed plate upper surface is provided with the rubber pad, be equipped with spiral slip track in the lower valve body, the rotor plate is located the track to can follow the track and reciprocate.
Compared with the prior art, the invention has the beneficial effects that the magnetic sensor and the pressure controller are arranged, after the anchoring sleeve is unfolded in place, the blocking plate is retracted, so that the upper valve body sliding assembly can move downwards under the action of top hydraulic pressure, after the top pressure is removed, the upper valve body sliding assembly can rotate upwards under the drive of the elastic piece, and the upper valve body and the lower valve body can be opened for a plurality of times by applying hydraulic pressure to the upper valve body sliding assembly.
Further, the water conservancy diversion hole slope sets up, and when there is the liquid to flow down at the top, receives the influence of pressure, and the rotor plate can produce rotatory trend, when adopting the stopper to restrict the second body of rod to stretch out, the stopper card is on the barrier plate, and the limiting plate has both prevented that the second body of rod stretches out, has prevented the rotor plate again and has rotated, goes up the whole downthehole removal of valve body under the effect of pressure. When the blocking plate is retracted, the rotating plate can rotate, the first rod body and the second rod body are prevented from rotating relatively by the limiting groove, the rotating plate can drive the upper valve body sliding assembly to integrally rotate, the elastic piece is driven to extend in the rotating process, and the elastic piece stores kinetic energy for driving the rotating plate to reversely rotate and rise; the upper valve body and the lower valve body are controlled to be opened for a plurality of times through a mechanical principle.
Further, through setting up the pressure controller and examining, with magnetic induction sensor detects data change information in the time of working in the pit, through the autonomous detection in the pit, increased the timeliness that data was decided, can judge fast and effectively whether the anchor cover struts in place.
Furthermore, a plurality of stretching standards are adopted to adapt to different environments, and meanwhile, when two standards are selected and simultaneously determined, the phenomenon that the blocking plate is not retracted in time due to the fact that a single determination standard does not reach the standard can be prevented.
Further, in the process of expanding the anchoring sleeve, the pressure detected by the pressure controller is continuously increased, and when the pressure is increased to a certain degree, the anchoring sleeve is embedded into the well wall to a certain degree, and the embedding is completed after the strength reaches the standard.
Further, in the process that the upper valve body moves downwards, the magnetic block is continuously close to the magnetic induction sensor, the magnetic induction sensor detects that the numerical value is continuously increased, when the magnetic block is attached to the magnetic induction sensor, the magnetic induction intensity reaches the maximum value, the anchoring sleeve is completely opened, and the blocking plate is retracted, so that the rotating plate can move up and down.
Further, through setting up the track for the rotor plate can be followed appointed route and removed, when having ensured the rotor plate pressfitting on the fixed plate, go up the valve body with the lower valve body is intact closed, simultaneously, can ensure that the rotor plate upwards moves when the rotor plate drives the counter-rotation under the elastic component. Through setting up the rubber pad and ensured the rotor plate pressfitting good leakproofness when on the fixed plate, ensured go up the valve body with the lower valve body is intact closed.
Drawings
FIG. 1 is a schematic diagram of a pressure controlled downhole switching bridge plug according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the structure of the upper valve body according to the embodiment of the present invention;
FIG. 3 is a schematic structural view of a fixing plate according to an embodiment of the present invention;
FIG. 4 is a schematic view of a structure of a rotating plate according to an embodiment of the present invention;
FIG. 5 is a schematic view of a telescopic rod according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a first periodic bridge plug switch-on process according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a bridge plug switching process in an embodiment of the present invention.
Description of the embodiments
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, fig. 2, and fig. 3, fig. 1 is a schematic structural diagram of a pressure-controlled downhole switching bridge plug according to an embodiment of the invention; FIG. 2 is a schematic diagram of the structure of the upper valve body according to the embodiment of the present invention; fig. 3 is a schematic structural view of a fixing plate according to an embodiment of the present invention.
The invention provides a voltage-controlled underground switch bridge plug, which comprises,
an upper valve body 1 disposed at an upper portion of the bridge plug body, the upper valve body 1 including an upper valve body fixing assembly 11 and an upper valve body sliding assembly 12, the upper valve body sliding assembly 12 being horizontally rotatable and vertically retractable, an elastic member 116 being disposed between the upper valve body fixing assembly 11 and the upper valve body sliding assembly 12;
a lower valve body 2 arranged below the bridge plug upper valve body 1, wherein the upper end of the lower valve body 2 is arranged in the lower end of the upper valve body 1, a fixed plate 21 is arranged on the lower valve body 2, and a through hole 211 is arranged on the fixed plate 21;
the anchoring sleeve 3 is arranged between the upper valve body and the lower valve body and sleeved on the periphery of the bottom of the upper valve body; the surface of the anchoring sleeve 3 is provided with regularly arranged diamond anchoring teeth;
a blocking plate 4, which is arranged on the upper valve body and used for preventing the upper valve body sliding component 12 from telescoping, wherein the blocking plate 4 is provided with a rotary switch;
a pressure controller 5 which is provided at the top end of the junction between the upper valve body and the anchor sleeve 3 and is located on the upper valve body;
a magnetic induction sensor 6 arranged at the bottom of the anchoring sleeve 3;
the magnetic block 7 is arranged at the bottom end of the upper valve body;
the judging module is respectively connected with the pressure controller 5, the magnetic induction sensor 6 and the rotary switch and is used for judging whether the anchoring sleeve 3 is unfolded in place or not, and the judging module is arranged above the rotary switch;
the upper valve body can move downwards under the action of hydraulic pressure, the anchoring sleeve 3 is outwards propped up while moving, the blocking plate 4 is retracted after the anchoring sleeve 3 is propped up in place, the upper valve body sliding assembly 12 moves downwards under the action of hydraulic pressure, meanwhile, the elastic piece 116 stretches, and when the bottom end of the upper valve body sliding assembly 12 is attached to the fixing plate 21, the upper valve body and the lower valve body are closed; when the hydraulic pressure of the upper valve body is removed, the elastic member 116 contracts and drives the upper valve body sliding assembly 12 to move upwards, and the upper valve body and the lower valve body are opened.
Through setting up magnetic sensor and pressure controller 5, after anchor cover 3 struts in place, pack up barrier plate 4, make last valve body slip subassembly 12 can be under the hydraulic action of top downwardly moving, after getting rid of top pressure, under the drive of elastic component 116, go up valve body slip subassembly 12 can gyration and move up, through applying hydraulic pressure to last valve body slip subassembly 12 can realize going up the valve body with the multiple opening of lower valve body.
Referring to fig. 4 and 5, fig. 4 is a schematic structural diagram of a rotating plate according to an embodiment of the invention; fig. 5 is a schematic structural view of a telescopic rod according to an embodiment of the present invention.
The upper valve body fixing assembly 11 includes,
an upper valve body 111 disposed in the bridge plug body, wherein an outer wall of an upper half of the upper valve body 111 contacts the bridge plug body, and an outer wall of a lower half of the upper valve body 111 is a slope and contacts an inner surface of the anchor sleeve 3;
a sleeve 112 disposed in the upper valve body 111 and connected to the upper valve body 111 through a fixed connecting rod 113, wherein a planar bearing 114 is disposed at the bottom end of the sleeve 112; the blocking plate 4 is arranged at the bottom end of the sleeve 112;
an elastic piece groove 115 is formed in the top end of the upper valve body 111, an elastic piece 116 is arranged in the elastic piece groove 115, and the elastic piece 116 is a spring arranged circumferentially.
Specifically, the upper valve body slide assembly 12 includes,
a rotating plate 121 disposed at the bottom of the upper valve body sliding assembly 12, wherein the rotating plate 121 is provided with a diversion hole 128, and the diversion hole 128 is disposed obliquely;
the telescopic rod 122 is arranged above the rotary plate 121, and the bottom end of the telescopic rod 122 is fixedly connected with the rotary plate 121; the telescopic rod 122 is divided into a first rod body 124 and a second rod body 125, wherein a cavity is arranged in the first rod body 124 and is sleeved outside the second rod body 125, and the second rod body 125 can move up and down along the direction of the cavity; the second rod 125 is provided with a limiting groove 127 and a limiting block 126, the limiting groove 127 can limit the first rod 124 and the second rod 125 to rotate relatively, and the limiting block 126 can limit the second rod 125 to move up and down;
and a rotating rod 123 disposed at the top end of the telescopic rod 122 and connected to the elastic member 116.
The guiding hole 128 is obliquely arranged, when the top of the guiding hole has liquid flowing down, the guiding hole is influenced by pressure, the rotating plate 121 can generate a rotating trend, when the limiting block 126 is adopted to limit the second rod body 125 to extend out, the limiting block 126 is clamped on the blocking plate 4, the limiting plate prevents the second rod body 125 from extending out, the rotating plate 121 is prevented from rotating, and the whole upper valve body moves downwards under the action of the pressure. When the blocking plate 4 is retracted, the rotating plate 121 rotates, the first rod 124 and the second rod 125 are prevented from rotating relatively by the limiting groove 127, so that the rotating plate 121 can drive the upper valve body sliding assembly 12 to rotate integrally, and in the rotating process, the elastic piece 116 is driven to extend, and the elastic piece 116 stores kinetic energy for driving the rotating plate 121 to rotate reversely and rise; the upper valve body and the lower valve body are controlled to be opened for a plurality of times through a mechanical principle.
Specifically, when the bridge plug works for the first time, the ground pump injects water into the shaft, the upper valve body sliding assembly 12 moves downwards under the action of hydraulic pressure, the blocking plate 4 prevents the expansion rod 122 from being elongated, the upper valve body sliding assembly 12 drives the upper valve body to move downwards integrally and outwards to prop open the anchoring sleeve 3, the pressure controller 5 detects the pressure borne by the upper valve body, the magnetic induction sensor 6 detects the sensed magnetic force to determine whether the anchoring sleeve 3 is propped open in place, and after the anchoring sleeve 3 is propped open in place, the blocking plate 4 is retracted.
Through setting up pressure controller 5 and examining with magnetic induction sensor 6 detects data change information in the during operation in the pit, through the autonomous detection in the pit, increased the timeliness of data judgement, can judge fast and effectively whether anchor sleeve 3 struts in place.
Specifically, two whether the anchoring sleeve 3 is in-place or not is judged according to a first expansion standard and a second expansion standard;
the evaluation module can select any one of the first and second stretching standards to judge whether the anchoring sleeve 3 is stretched in place, and can also select the first and second stretching standards to judge whether the anchoring sleeve 3 is stretched in place at the same time.
The adoption of a plurality of stretching standards adapts to different environments, and simultaneously when two standards are selected and simultaneously determined, the phenomenon that the blocking plate 4 is not retracted in time due to the fact that a single determination standard does not reach the standard can be prevented.
In particular, when the first distraction criterion is used to judge whether the anchoring sleeve 3 is distracted in place,
the pressure controller 5 detects the pressure F born by itself in real time and transmits the detection result to the evaluation module, the evaluation module is internally provided with a pressure evaluation parameter Fp, the evaluation module compares the pressure F with the evaluation parameter Fp,
when F is smaller than Fp, the evaluation module judges that the detected pressure is smaller than a preset value, and the anchoring sleeve 3 is not stretched in place;
when F is more than or equal to Fp, the evaluation module judges that the detected pressure reaches a preset value, the anchoring sleeve 3 is unfolded in place, the evaluation module controls the rotation switch to rotate, and the blocking plate 4 is retracted.
In the process of expanding the anchoring sleeve 3, the pressure detected by the pressure controller 5 is continuously increased, and when the pressure is increased to a certain degree, the anchoring sleeve 3 is embedded into the well wall to a certain degree, and the embedding is completed after the strength reaches the standard.
In particular, when the second distraction criterion is used to evaluate whether the anchoring sleeve 3 is distracted in place,
the magnetic induction sensor 6 detects the magnetic induction intensity W in real time and transmits the detection result to the evaluation module, the evaluation module is internally provided with a magnetic induction intensity evaluation parameter Wp, the evaluation module compares the magnetic induction intensity W with the evaluation parameter Wp,
when W is smaller than Wp, the evaluation module judges that the detected magnetic induction intensity is smaller than a preset value, and the anchoring sleeve 3 is not unfolded in place;
when W is more than or equal to Wp, the evaluation module judges that the detected magnetic induction intensity reaches a preset value, the anchoring sleeve 3 is unfolded in place, the evaluation module controls the rotation switch to rotate, and the blocking plate 4 is retracted.
In the process of downward movement of the upper valve body, the magnetic block 7 is continuously close to the magnetic induction sensor 6, the magnetic induction sensor 6 detects that the numerical value is continuously increased, when the magnetic block 7 is attached to the magnetic induction sensor 6, the magnetic induction intensity reaches the maximum value, and at the moment, the anchoring sleeve 3 is judged to be completely unfolded, the blocking plate 4 is retracted, and the rotating plate 121 can move up and down.
Specifically, when the blocking plate 4 is retracted, the rotating plate 121 moves downward under the action of pressure, in the moving process, the telescopic rod 122 extends, meanwhile, the rotating plate 121 drives the telescopic rod 122 and the rotating rod 123 to rotate, the rotating rod 123 drives the elastic member 116 to stretch, when the rotating plate 121 moves downward to the top end of the fixed plate 21, and when the lower surface of the rotating plate 121 is attached to the upper surface of the fixed plate 21, the through hole formed in the fixed plate 21 and the diversion hole 128 of the rotating plate 121 are in a dislocation position, and the upper valve body and the lower valve body are closed.
Specifically, when the ground pump is turned off, after the pressure in the well body is released, the elastic element 116 contracts to drive the telescopic rod 122 to rotate with the rotating rod 123, the rotating rod 123 moves upwards, and the upper valve body and the lower valve body are opened.
Specifically, a rubber pad is disposed on the upper surface of the fixed plate 21, a spiral sliding rail is disposed in the lower valve body, and the rotating plate 121 is disposed in the rail and can move up and down along the rail.
Through setting up the track for rotor plate 121 can follow the specified route and remove, has ensured when rotor plate 121 pressfitting on fixed plate 21, go up the valve body with the lower valve body is intact closed, simultaneously, can ensure when rotor plate 121 drives the counter-rotation under the elastic component 116 and upwards remove rotor plate 121. By arranging the rubber pad, good tightness is ensured when the rotary plate 121 is pressed on the fixed plate 21, and the upper valve body and the lower valve body are completely closed.
With continued reference to fig. 6 and 7, fig. 6 is a schematic structural diagram illustrating a closing-to-opening process of the first periodic bridge plug according to an embodiment of the present invention; fig. 7 is a schematic diagram of the bridge plug opening and closing process in an embodiment of the present invention, wherein the wellbore 8, the coiled tubing 9, the pump setting 10, the disconnecting tool 102, the bridge plug 101, the low pressure zone 13, the high pressure zone 14, the oil pump 16, the tubing 15, the oil flow 18, and the screw pump 19.
When the pressure-controlled underground switch bridge plug is plugged into a well, the pressure-controlled underground switch bridge plug is conveyed to a preset depth of a shaft by a continuous oil pipe, clean water is pumped into the continuous oil pipe for the first time, the ground pump pressure lasts for 5min under 40MPa, and the anchoring sleeve is unfolded to the wall of the shaft, as shown in (1) in fig. 6.
The ground pump pressure is continued to be raised to 60MPa, and when the pressure suddenly drops, the disengagement tool is disengaged from the bridge plug, as in fig. 6 (2).
After the corresponding process steps are completed in the well bore above the bridge plug, pumping and pressurizing are carried out from the well bore to open the bridge plug, as shown in (3) of fig. 6.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
Claims (9)
1. A voltage controlled downhole switching bridge plug, characterized in that it comprises,
the upper valve body comprises an upper valve body fixing assembly and an upper valve body sliding assembly, the upper valve body sliding assembly can horizontally rotate and can stretch in the vertical direction, and an elastic piece is arranged between the upper valve body fixing assembly and the upper valve body sliding assembly;
the lower valve body is arranged below the bridge plug upper valve body, the upper end of the lower valve body is arranged in the lower end of the upper valve body, a fixed plate is arranged on the lower valve body, and a through hole is formed in the fixed plate;
the anchoring sleeve is arranged between the upper valve body and the lower valve body and sleeved on the periphery of the bottom of the upper valve body; the surface of the anchoring sleeve is provided with regularly arranged diamond anchoring teeth;
a blocking plate arranged on the upper valve body for preventing the upper valve body sliding component from extending, wherein the blocking plate is provided with a rotary switch;
the pressure controller is arranged at the top end of the joint of the upper valve body and the anchoring sleeve and is positioned on the upper valve body;
the magnetic induction sensor is arranged at the bottom of the anchoring sleeve;
the magnetic block is arranged at the bottom end of the upper valve body;
the judging module is respectively connected with the pressure controller, the magnetic induction sensor and the rotary switch and is used for judging whether the anchoring sleeve is unfolded in place or not;
the upper valve body can move downwards under the action of hydraulic pressure, the anchoring sleeve is outwards propped up while moving, the blocking plate is retracted after the anchoring sleeve is propped up in place, the upper valve body sliding assembly moves downwards under the action of hydraulic pressure, meanwhile, the elastic piece stretches, and when the bottom end of the upper valve body sliding assembly is attached to the fixing plate, the upper valve body and the lower valve body are closed; when the hydraulic pressure of the upper valve body is removed, the elastic piece contracts and drives the upper valve body sliding assembly to move upwards, and the upper valve body and the lower valve body are opened.
2. The pressure controlled downhole switching bridge plug of claim 1, wherein,
the upper valve body fixing assembly comprises a lower valve body,
the outer wall of the lower half part of the upper valve body is an inclined plane and is contacted with the inner surface of the anchoring sleeve;
the sleeve is arranged in the upper valve body main body and is connected with the upper valve body main body through a fixed connecting rod, and a plane bearing is arranged at the bottom end of the sleeve; the blocking plate is arranged at the bottom end of the sleeve;
the top end of the upper valve body main body is provided with an elastic piece groove, an elastic piece is arranged in the elastic piece groove, and the elastic piece is a spring arranged circumferentially.
3. The pressure controlled downhole switching bridge plug of claim 2, wherein,
the upper valve body sliding assembly comprises a lower valve body,
the rotating plate is arranged at the bottom of the upper valve body sliding assembly and is provided with a diversion hole which is obliquely arranged;
the telescopic rod is arranged above the rotating plate, and the bottom end of the telescopic rod is fixedly connected with the rotating plate; the telescopic rod is divided into a first rod body and a second rod body, wherein a cavity is formed in the first rod body and sleeved outside the second rod body, and the second rod body can move up and down along the direction of the cavity; the second rod body is provided with a limiting groove and a limiting block, the limiting groove can limit the first rod body and the second rod body to rotate relatively, and the limiting block can limit the second rod body to move up and down;
and the rotating rod is arranged at the top end of the telescopic rod and is connected with the elastic piece.
4. The pressure controlled downhole switching bridge plug of claim 3, wherein when the bridge plug is first operated, a surface pump injects water into a shaft, the upper valve body sliding assembly moves downwards under the action of hydraulic pressure, the blocking plate prevents the expansion rod from extending, the upper valve body sliding assembly drives the upper valve body to move downwards integrally and outwards to prop open the anchoring sleeve, the pressure controller detects the pressure applied during the process of expanding the anchoring sleeve, the magnetic induction sensor detects the sensed magnetic force to determine whether the anchoring sleeve is expanded in place, and the blocking plate is retracted after the anchoring sleeve is expanded in place.
5. The pressure controlled downhole switching bridge plug of claim 4, wherein the two anchor sleeve in-place criteria are a first distraction criteria and a second distraction criteria, respectively;
the evaluation module can select any one of the first stretching standard and the second stretching standard to judge whether the anchoring sleeve is stretched in place, and can also select the first stretching standard and the second stretching standard simultaneously to judge whether the anchoring sleeve is stretched in place.
6. The pressure controlled downhole switching bridge plug of claim 5, wherein when the first distraction criteria is used to evaluate whether the anchor sheath is distracted in place,
the pressure controller detects the pressure F born by the pressure controller in real time and transmits the detection result to the evaluation module, the evaluation module is internally provided with a pressure evaluation parameter Fp, the evaluation module compares the pressure F with the evaluation parameter Fp,
when F is smaller than Fp, the evaluation module judges that the detected pressure is smaller than a preset value, and the anchoring sleeve is not unfolded in place;
when F is more than or equal to Fp, the evaluation module judges that the detected pressure reaches a preset value, the anchoring sleeve is unfolded in place, the evaluation module controls the rotary switch to rotate, and the blocking plate is retracted.
7. The pressure controlled downhole switching bridge plug of claim 6, wherein when the second distraction criteria is used to evaluate whether the anchor sheath is distracted in place,
the magnetic induction sensor detects the magnetic induction intensity W in real time and transmits the detection result to the evaluation module, the evaluation module is internally provided with a magnetic induction intensity evaluation parameter Wp, the evaluation module compares the magnetic induction intensity W with the evaluation parameter Wp,
when W is smaller than Wp, the evaluation module judges that the detected magnetic induction intensity is smaller than a preset value, and the anchoring sleeve is not stretched in place;
when W is more than or equal to Wp, the evaluation module judges that the detected magnetic induction intensity reaches a preset value, the anchoring sleeve is unfolded in place, the evaluation module controls the rotation switch to rotate, and the blocking plate is folded.
8. The pressure controlled downhole switch bridge plug according to claim 7, wherein when said blocking plate is retracted, said rotating plate moves downward under pressure, during movement, said telescoping rod is extended, while said rotating plate drives said telescoping rod and said rotating rod to rotate, said rotating rod drives said elastic member to stretch, and when said rotating plate moves downward to said top end of said fixed plate, and said lower surface of said rotating plate is in contact with said upper surface of said fixed plate, said through hole provided by said fixed plate is in a dislocated position with said rotating plate diversion hole, and said upper valve body and said lower valve body are closed.
9. The pressure controlled downhole switch bridge plug of claim 8, wherein a rubber pad is disposed on an upper surface of the fixed plate, a spiral sliding track is disposed in the lower valve body, and the rotating plate is disposed in the track and can move up and down along the track.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211048747.5A CN115263234B (en) | 2022-08-30 | 2022-08-30 | Pressure-controlled underground switch bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211048747.5A CN115263234B (en) | 2022-08-30 | 2022-08-30 | Pressure-controlled underground switch bridge plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115263234A CN115263234A (en) | 2022-11-01 |
| CN115263234B true CN115263234B (en) | 2023-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211048747.5A Active CN115263234B (en) | 2022-08-30 | 2022-08-30 | Pressure-controlled underground switch bridge plug |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5813456A (en) * | 1996-11-12 | 1998-09-29 | Milner; John E. | Retrievable bridge plug and retrieving tool |
| US6220348B1 (en) * | 1998-10-20 | 2001-04-24 | Polar Completions Engineering Inc. | Retrievable bridge plug and retrieving tool |
| US7255178B2 (en) * | 2000-06-30 | 2007-08-14 | Bj Services Company | Drillable bridge plug |
| US20110017475A1 (en) * | 2009-04-03 | 2011-01-27 | Baker Hughes Incorporation | Nitinol Spring Through Tubing Bridge Plug |
| CN102635328B (en) * | 2012-04-16 | 2015-03-04 | 中国石油化工股份有限公司 | Method for running bridge plug sitting tool by means of differential pressure and bridge plug sitting tool utilized by same |
| CN113090226B (en) * | 2019-12-23 | 2023-02-28 | 中国石油天然气股份有限公司 | Bridge plug control switch |
| CN215292438U (en) * | 2020-10-28 | 2021-12-24 | 中国石油化工股份有限公司 | Recyclable oil pipe bridge plug |
| CN113073958B (en) * | 2021-03-19 | 2023-04-07 | 中国石油天然气集团有限公司 | Recyclable bridge plug and using method |
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