Drillable bump-pressure joint

Abstract

The invention discloses a drillable bump-pressure connector, and relates to the technical field of well bridge plug cement packing.The drillable bump-pressure connector comprises an isolation mounting part, a bridge plug propelling part is mounted on the isolation mounting part, and the bridge plug propelling part is used for propelling cement slurry; a detection power connection piece is mounted on the bridge plug propelling piece; a multi-stage horizontal packing piece is mounted on the isolation mounting piece; the multi-stage horizontal packing piece is used for rotating in the isolation mounting piece; a bump pressure driving piece is mounted on the isolation mounting piece; the in-place condition of the bridge plug propelling part can be detected by adopting the packing in-place detection part during packing work, the bridge plug propelling part can be ensured to control the grading packing plate to rotate for packing, and the structure can be more convenient for a worker to judge; the invention relates to a drillable bump-pressure joint, and aims to solve the problems that the existing drillable bump-pressure joint is inconvenient for a worker to detect the packing effect of a bridge plug and the in-place condition of the bridge plug, and the bridge plug is easily blocked by a casing string to interfere the judgment of the worker.

Description

Technical Field

[0001] The invention relates to the technical field of wellbore bridge plug cement isolation, in particular to a drillable impact-pressure joint. Background Art

[0002] In actual cementing construction work, cement needs to be injected into the casing string, and then the cement needs to be discharged from the bottom of the casing string to the outside of the casing string for filling and reinforcement. The lower end of the casing string usually needs to use a floating shoe and a floating collar to play the role of a one-way valve. However, in addition to setting up a floating shoe and a floating collar for one-way flow, in order to ensure that the injected cement can be discharged outside the casing string and avoid cement clogging the casing string, a bridge plug is needed to push the cement and then seal it. A bumping structure needs to be set above the floating shoe and a floating collar to stop the bridge plug. The role of the bridge plug is more important. After the cement is completely pushed into the outside of the casing string, the bridge plug will touch the bumping structure To achieve the purpose of prompting, the impact-pressure structure needs to cooperate with the bridge plug to isolate the cement below from the mud above. The current drillable impact-pressure joint is not convenient for automatically limiting the bridge plug, and most of them are one-way stop bridge plugs, which is not convenient for staff to detect the sealing effect of the bridge plug, and it is also not convenient to detect the position of the bridge plug. The bridge plug is easily stuck by the casing column, which interferes with the judgment of the staff and affects safety. At the same time, traditional impact-pressure packers mostly use structures such as slips or expansions to use friction to isolate. The structure is not strong enough and is easily loosened by the cement pressure in the well, which is not convenient for automatic control and sealing of the pre-buried level.

[0003] To this end, we propose a drillable impact joint. Summary of the invention

[0004] The object of the present invention is to provide a drillable impact-pressure joint to solve the problem mentioned in the above background technology that the current drillable impact-pressure joint is not convenient for staff to detect the sealing effect of the bridge plug, and it is also not convenient to detect the position of the bridge plug, and the bridge plug is easily stuck by the casing column, which interferes with the judgment of the staff.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a drillable impact joint, comprising an isolation mounting part, on which a bridge plug propulsion part is installed, and the bridge plug propulsion part is used to propel cement slurry; a detection power connection part is installed on the bridge plug propulsion part; a multi-stage horizontal packing part is installed on the isolation mounting part; the multi-stage horizontal packing part is used to rotate inside the isolation mounting part; a impact driving part is installed on the isolation mounting part, and the impact driving part is used to drive the multi-stage horizontal packing part to rotate; a floating shoe isolation part is installed on the impact driving part; the floating shoe isolation part is used to close the valve of the cementing float shoe Core; a sealing in place detection part is installed on the isolation mounting part; the sealing in place detection part is used to detect that the bridge plug pusher is in place; the isolation mounting part comprises: a sealing connection tube, a fixed sealing block and a sliding connection block, the upper end of the sealing connection tube is provided with an internal thread, and the lower end of the sealing connection tube is provided with an external thread; a fixed sealing block is fixedly installed inside the sealing connection tube, and the fixed sealing block is provided with four through holes; a sliding connection block is fixedly sleeved on the sealing connection tube; the sliding connection block is fixedly mounted on the fixed sealing block; the sliding connection block is provided with four through holes; the sliding connection block is provided with a hexagonal hole.

[0006] Preferably, the impact-pressure driving component comprises: a lifting column, a guide spiral groove, a plug-in groove and a positioning groove, the lifting column is slidably installed on a sliding connection block; six guide spiral grooves are provided inside the lifting column, and the guide spiral grooves are of a spiral structure; the lifting column is slidably sleeved on a rotating cylinder; the six guide steel balls are respectively located inside the six guide spiral grooves; six plug-in grooves are provided on the lifting column, and the six plug-in grooves are respectively aligned with six isolation positioning pins; a positioning groove is provided on the top of the lifting column; the lifting column is of a hexagonal structure; the impact-pressure spring is located on the inner side of the lifting column; four positioning thorn-shaped blocks are plugged into the positioning groove.

[0007] Preferably, the detection power connection component includes: a connecting column, a power connection docking ring and an electromagnet, the connecting column is slidably inserted on the bridge plug shaft; two power connection docking rings are fixedly installed on the connecting column, and the two power connection docking rings are respectively fitted and connected to the two power connection rings; an electromagnet is fixedly embedded on the connecting column, and the electromagnet magnetically attracts the bridge plug shaft.

[0008] Preferably, the isolation mounting component also includes: an isolation positioning pin and a positioning spring, wherein six isolation positioning pins are provided, and the six isolation positioning pins are respectively slidably mounted on the inner side of the sliding connection block; six positioning springs are sleeved inside the sliding connection block; the ends of the six positioning springs are respectively fixedly mounted on the inner side of the sliding connection block, and the other ends of the six positioning springs are fixedly mounted on the tail of the isolation positioning pin, and the end of the isolation positioning pin is a slope structure.

[0009] Preferably, the float shoe isolation component includes: a float shoe isolation shaft and a valve core isolation cover, the float shoe isolation shaft is fixedly installed at the bottom of the lifting column; the float shoe isolation shaft is slidably sleeved on the isolation rotating shaft; a valve core isolation cover is fixedly installed at the bottom of the float shoe isolation shaft; the valve core isolation cover is used to cover and buckle on the float shoe.

[0010] Preferably, the bridge plug thruster comprises: a bridge plug shaft, a power coil, a bridge plug rubber sleeve, a positioning spike block and an anti-slip spring, the bridge plug shaft is located on the inner side of the isolation connecting tube; a bridge plug rubber sleeve is sleeved on the bridge plug shaft; the bridge plug rubber sleeve is used to be sleeved on the inner side of the isolation connecting tube; four positioning spike blocks are slidably installed on the bottom of the bridge plug shaft, and the ends of the four positioning spike blocks are respectively spike-shaped structures; an anti-slip spring is slidably installed on the bridge plug shaft; the end of the anti-slip spring is connected to the side of the positioning spike block, and the other end of the anti-slip spring is connected to the end of the bridge plug shaft; two power coils are fixedly installed on the top of the bridge plug shaft; the outer ring of the bridge plug rubber sleeve is provided with a bevel groove; the bridge plug thruster is used to push cement.

[0011] Preferably, the multi-stage horizontal isolation component includes: an isolation rotating shaft, a graded isolation plate, a rotating cylinder, a pressure spring and a guide steel ball, the isolation rotating shaft is rotatably mounted on a fixed isolation block; a row of graded isolation plates is fixedly mounted on the isolation rotating shaft, and a row of graded isolation plates are respectively rotatably sleeved on the fixed isolation blocks; a row of graded isolation plates are respectively provided with four through holes; the rotating cylinder is fixedly mounted on the isolation rotating shaft; a pressure spring is sleeved inside the rotating cylinder; six guide steel balls are fixedly mounted on the rotating cylinder; the graded isolation plates are used for isolating cement slurry.

[0012] Preferably, the detection electrical connection part also includes: a detection lead wire and a buzzer, the detection lead wire is fixedly mounted on the connecting column; a buzzer is installed on the detection lead wire; the buzzer is used to prompt that the sealing is in place; the end of the detection lead wire is used to be installed in the mud grouting pipe.

[0013] Preferably, the sealing in place detection component includes: a separation detection column and a docking magnet, and the separation detection column is slidably sleeved on the bottom of the bridge plug shaft; a docking magnet is fixedly installed on the bottom of the separation detection column, and the docking magnet is used to magnetically attract the top of the lifting column.

[0014] Preferably, the sealing in place detection component also includes: a detection microswitch and an anti-accidental touch tension spring, the detection microswitch is fixedly mounted on the separation detection column; the end of the detection microswitch is attached to the inside of the bridge plug shaft; an anti-accidental touch tension spring is fixedly installed inside the bridge plug shaft, and the end of the anti-accidental touch tension spring is connected to the separation detection column; the detection microswitch, the power-on ring, the power-on docking ring, the detection lead wire and the buzzer are connected in series with a power supply.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention adopts an isolation mounting piece that can be directly pre-installed on the floating shoe, and can utilize liquid propulsion pressure. When the bridge plug shaft moves, the lifting column can be controlled to propel the isolation rotating shaft to drive the graded isolation plate to rotate. The fixed isolation block is used in conjunction with the graded isolation plate for sealing. The axial cement pressure resistance effect is better, and the sealing effect is improved. The problem that traditional axial sleeve or cava expansion type packers are easy to fall off can be avoided. The structure has good protection effect and can ensure the sealing quality. At the same time, the graded multi-piece graded isolation plate can be more easily broken during subsequent drilling and crushing, so as to avoid the problem that the shear pin of the traditional sleeve-sealed isolation structure is broken due to high water pressure when cement is pressed into the wellbore, resulting in the problem of incorrect sealing.

[0017] The method of electromagnetically connecting the bridge plug pusher with the detection power connection piece can facilitate dismantling and avoid economic losses caused by cables. At the same time, the quality of in-place detection can be guaranteed. The bridge plug pusher can be used to quickly advance cement. The cement below the bridge plug pusher can be pushed into the isolation connecting tube. The mud above the bridge plug pusher can also be isolated to ensure the isolation effect. The positioning thorn block can be used to achieve rapid positioning to ensure the stability of the bridge plug pusher. At the same time, the bridge plug pusher that can be stably positioned can facilitate pressure measurement by the staff and ensure stability during pressure measurement.

[0018] The use of a float shoe spacer can facilitate the closure of the float shoe, and can seal and fit the valve core inside the float shoe, further preventing the valve core from being loosely closed due to particle impurities and other reasons, thereby ensuring the sealing quality of this structure.

[0019] The use of the sealing in place detection piece can detect the position of the bridge plug pusher during the sealing work, and can ensure that the bridge plug pusher can control the rotation of the graded sealing plate for sealing, which is more convenient for the staff to judge and can ensure the accuracy of the sealing position. At the same time, it can prevent the rubber sleeve of the bridge plug from being stuck due to impurities or protrusions on the inner wall of the casing column during sealing, causing a sudden increase in pressure, causing the staff to mistakenly believe that the impact is completed. At the same time, the structure can use the magnetic control detection method to avoid the problem of false touch of the detection micro switch caused by large pressure below when the sealing in place detection piece is pressed down, thereby ensuring the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a drillable impact-pressure joint of the present invention;

[0021] Figure 2 A partial cross-sectional view of a drillable impact-pressure joint of the present invention;

[0022] Figure 3 A cross-sectional view of a drillable impact-compression joint structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the isolation mounting member of the present invention;

[0024] Figure 5 For the present invention Figure 3 A magnified view of the structure of the middle D region;

[0025] Figure 6 This is a schematic diagram of the structure of the bridge plug propulsion member of the present invention;

[0026] Figure 7 For the present invention Figure 3 A magnified view of the structure of the middle E region;

[0027] Figure 8 This is a schematic diagram of the structure of the power connection component for detecting the present invention;

[0028] Fig. 9 It is a schematic diagram of the structure of the multi-stage horizontal packing member of the present invention;

[0029] Fig.10 This is a schematic diagram of the structure of the impact-pressure driving member of the present invention;

[0030] Fig.11 This is a schematic diagram of the structure of the floating shoe isolation member of the present invention;

[0031] Fig.12 For the present invention Figure 3 A magnified view of the structure of the middle F region.

[0032] In the figure: 1. Isolation mounting part; 101. Sealing connecting tube; 102. Fixed sealing block; 103. Sliding connecting block; 104. Isolation positioning pin; 105. Positioning spring; 2. Bridge plug pusher; 201. Bridge plug shaft; 2011. Electrical connection ring; 202. Bridge plug rubber sleeve; 203. Positioning thorn block; 204. Anti-drop spring; 3. Detection electrical connection part; 301. Connecting column; 302. Electrical connection ring; 303. Electromagnet; 304. Detection lead wire; 305. Buzzer; 4. Multi-level Packing parts; 401, packing rotating shaft; 402, graded packing plate; 403, rotating cylinder; 404, impact spring; 405, guide steel ball; 5, impact drive part; 501, lifting column; 5011, guide spiral groove; 5012, plug-in groove; 502, positioning groove; 6, floating shoe isolation part; 601, floating shoe isolation shaft; 602, valve core isolation cover; 7, packing in place detection part; 701, separation detection column; 702, docking magnet; 703, detection micro switch; 704, anti-accidental touch tension spring. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figure 1-Figure 12 As shown:

[0035] The present invention provides a technical solution: a drillable impact joint, comprising an isolation mounting part 1, a bridge plug propulsion part 2 is installed on the isolation mounting part 1, and the bridge plug propulsion part 2 is used to propel cement slurry; a detection power connection part 3 is installed on the bridge plug propulsion part 2; a multi-stage horizontal packing part 4 is installed on the isolation mounting part 1; the multi-stage horizontal packing part 4 is used to rotate inside the isolation mounting part 1; a impact driving part 5 is installed on the isolation mounting part 1, and the impact driving part 5 is used to drive the multi-stage horizontal packing part 4 to rotate; a floating shoe isolation part 6 is installed on the impact driving part 5; the floating shoe isolation part 6 is used to close the valve core of the cementing floating shoe; a packing in place detection part is installed on the isolation mounting part 1 Part 7; the isolation in place detection part 7 is used to detect that the bridge plug thruster 2 is in place; the isolation mounting part 1 comprises: an isolation connecting tube 101, a fixed isolation block 102 and a sliding connection block 103, the upper end of the isolation connecting tube 101 is provided with an internal thread, and the lower end of the isolation connecting tube 101 is provided with an external thread; a fixed isolation block 102 is fixedly installed inside the isolation connecting tube 101, and the fixed isolation block 102 is provided with four through holes; a sliding connection block 103 is fixedly sleeved on the isolation connecting tube 101; the sliding connection block 103 is fixedly installed on the fixed isolation block 102; the sliding connection block 103 is provided with four through holes; the sliding connection block 103 is provided with a hexagonal hole.

[0036] Among them, the isolation mounting part 1 also includes: isolation positioning pins 104 and positioning springs 105. There are six isolation positioning pins 104, and the six isolation positioning pins 104 are respectively slidably mounted on the inner side of the sliding connection block 103; six positioning springs 105 are sleeved inside the sliding connection block 103; the ends of the six positioning springs 105 are respectively fixedly mounted on the inner side of the sliding connection block 103, and the other ends of the six positioning springs 105 are fixedly mounted on the tail of the isolation positioning pin 104, and the end of the isolation positioning pin 104 is a slope structure; the multi-stage horizontal isolation component 4 includes: an isolation rotating shaft 401, a graded isolation plate 402, a rotating cylinder 403, a pressure spring 404 and a guide steel ball 405, and the isolation rotating shaft 401 is rotatably mounted on the fixed isolation block 102; a row of graded isolation plates 402 is fixedly mounted on the isolation rotating shaft 401, and a row of graded isolation plates 402 are respectively rotatably sleeved on the fixed isolation block 102; a row of graded isolation plates 402 are respectively provided with four through holes; the rotating cylinder 403 is fixedly mounted on the sealing rotating shaft 401; a collision spring 404 is sleeved inside the rotating cylinder 403; six guide steel balls 405 are fixedly mounted on the rotating cylinder 403; the graded sealing plate 402 is used to seal the cement slurry; the collision driving member 5 includes: a lifting column 501, a guide spiral groove 5011, a plug groove 5012 and a positioning groove 502, and the lifting column 501 is slidably mounted on the sliding connection block 103; six guide spiral grooves 501 are opened inside the lifting column 501 1, and the guide spiral groove 5011 is a spiral structure; the lifting column 501 is slidably sleeved on the rotating cylinder 403; the six guide steel balls 405 are respectively located inside the six guide spiral grooves 5011; six plug-in grooves 5012 are opened on the lifting column 501, and the six plug-in grooves 5012 are respectively aligned with the six isolation positioning pins 104; a positioning groove 502 is opened on the top of the lifting column 501; the lifting column 501 is a hexagonal structure; the impact spring 404 is located inside the lifting column 501;Four positioning thorn blocks 203 are inserted into the positioning groove 502. The structure adopts an isolation mounting piece 1 which can be directly pre-installed on the floating shoe. The liquid propulsion pressure can be used. When the bridge plug shaft 201 moves, the lifting column 501 can be controlled to propel the isolation rotating shaft 401 to drive the graded isolation plate 402 to rotate, so as to isolate the fixed isolation block 102. The rotation isolation work can be performed quickly. The structure adopts a rotatable graded isolation plate 402, which rotates in the fixed isolation block 102. The fixed isolation block 102 is used in conjunction with the graded isolation plate 402 for sealing. The axial cement pressure resistance effect is better, the isolation effect is improved, and the traditional axial sleeve type or slip expansion type packer can be avoided. The structure has a good protective effect and can ensure the sealing quality. At the same time, the graded multi-piece graded isolation plate 402 can be broken more easily during subsequent drilling and crushing. The guide spiral groove 5011 can be used to move the guide steel ball 405, and the spiral guide spiral groove 5011 can be used to control the rotating cylinder 403, drive the isolation rotating shaft 401 to rotate together, and control the rotation of the graded isolation plate 402. At this time, the through holes on the graded isolation plate 402 and the through holes on the fixed isolation block 102 are staggered to achieve sealing. The use of the rotary sealed graded isolation plate 402 can avoid the problem of mis-sealing of the traditional sleeve-sealed isolation structure caused by water pressure when cement is pressed into the wellbore. ;

[0037] Among them, the bridge plug propulsion member 2 includes: a bridge plug shaft 201, an electric coil 2011, a bridge plug rubber sleeve 202, a positioning spike block 203 and an anti-slip spring 204. The bridge plug shaft 201 is located on the inner side of the isolation connection tube 101; the bridge plug rubber sleeve 202 is sleeved on the bridge plug shaft 201; the bridge plug rubber sleeve 202 is used to be sleeved on the inner side of the isolation connection tube 101; four positioning spike blocks 203 are slidably installed at the bottom of the bridge plug shaft 201, and the ends of the four positioning spike blocks 203 are respectively spike-shaped structures; an anti-slip spring 204 is slidably installed on the bridge plug shaft 201; the end of the anti-slip spring 204 is connected to the side of the positioning spike block 203, and the other end of the anti-slip spring 204 is connected to the end of the bridge plug shaft 201; two electric coils 2 are fixedly installed on the top of the bridge plug shaft 201 011; the outer ring of the bridge plug rubber sleeve 202 is provided with an inclined groove; the bridge plug propeller 2 is used to propel cement; the detection power connection part 3 includes: a connecting column 301, a power connection docking ring 302 and an electromagnet 303, the connecting column 301 is slidably plugged into the bridge plug shaft 201; two power connection docking rings 302 are fixedly installed on the connecting column 301, and the two power connection docking rings 302 are respectively connected to the two power connection rings 2011; an electromagnet 303 is fixedly embedded on the connecting column 301, and the electromagnet 303 magnetically attracts the bridge plug shaft 201; the detection power connection part 3 also includes: a detection lead-out line 304 and a buzzer 305, the detection lead-out line 304 is fixedly installed on the connecting column 301; a buzzer 305 is installed on the detection lead-out line 304; the buzzer 305 is used The prompt is that the isolation is in place; the end of the detection lead-out line 304 is used to be installed in the mud grouting pipe. The detection power connection part 3 is electromagnetically connected to the bridge plug pusher 2, which can be easily removed to avoid economic losses caused by cables, and at the same time, the quality of in-place detection can be guaranteed. The bridge plug pusher 2 can be used to quickly advance cement, and the cement below the bridge plug pusher 2 can be pushed into the isolation connection tube 101, which can also ensure that the mud above the bridge plug pusher 2 is isolated, and the isolation effect can be guaranteed. The positioning thorn block 203 can be used to achieve rapid positioning, and the stability of the bridge plug pusher 2 can be guaranteed. At the same time, the bridge plug pusher 2 that can be stably positioned can facilitate pressure measurement by the staff, and the stability during pressure measurement is guaranteed. The detection lead-out line 304 is connected with a clamp. One end is connected to the mud grouting pipe. As the grouting proceeds, the bridge plug shaft 201 can be inserted into the casing column in cooperation with the bridge plug rubber sleeve 202. Under the action of pressure, the cement can be pushed out. When the bridge plug shaft 201 is in place, it will touch the lifting column 501. At this time, the pressure suddenly increases, which is also called collision pressure. At this time, under the squeezing of the positioning spring 105, the isolation positioning pin 104 can slide into the positioning groove 502, and the thorn-shaped structure is used to achieve unidirectional positioning. Subsequent staff can detect the pressure and maintain the pressure. After the cement injection is completed, the electromagnet 303 can be powered off to take out the connecting column 301. The connecting column 301 can be reused. After the cement sealing and curing is completed, the drilling drill bit can be used to crush the structure inside the sealing connecting tube 101.

[0038] Among them, the float shoe isolation part 6 includes: a float shoe isolation shaft 601 and a valve core isolation cover 602, the float shoe isolation shaft 601 is fixedly installed at the bottom of the lifting column 501; the float shoe isolation shaft 601 is slidably sleeved on the isolation rotating shaft 401; a valve core isolation cover 602 is fixedly installed at the bottom of the float shoe isolation shaft 601; the valve core isolation cover 602 is used to cover and buckle on the float shoe, and the use of the float shoe isolation part 6 can facilitate the closure of the float shoe, and can be sealed and fitted at the valve core inside the float shoe, further preventing the problem of the one-way valve not being tightly closed due to particle impurities and other reasons of the valve core, and can ensure the sealing quality of this structure.

[0039] Embodiment 2, on the basis of embodiment 1, the sealing in place detection member 7 comprises: a separation detection column 701 and a docking magnet 702, the separation detection column 701 is slidably sleeved on the bottom of the bridge plug shaft 201; a docking magnet 702 is fixedly installed at the bottom of the separation detection column 701, and the docking magnet 702 is used to magnetically attract the top of the lifting column 501; the sealing in place detection member 7 also comprises: a detection micro switch 703 and an anti-mistouch tension spring 704, the detection micro switch 703 is fixedly installed on the separation detection column 701; the detection The end of the micro switch 703 is attached to the inside of the bridge plug shaft 201; the bridge plug shaft 201 is fixedly installed with an anti-misconducting tension spring 704, and the end of the anti-misconducting tension spring 704 is connected to the separation detection column 701; the detection micro switch 703, the power ring 2011, the power connection ring 302, the detection lead wire 304 and the buzzer 305 are connected in series with the power supply, and the isolation in place detection part 7 can be used to detect the in place status of the bridge plug propeller 2 during the isolation work, so as to ensure that the bridge plug propeller 2 can control the grading The isolation plate 402 is rotated for isolation. This structure can be more convenient for the staff to judge and can ensure the accuracy of the isolation position. At the same time, it can prevent the bridge plug rubber sleeve 202 from being stuck and the pressure from increasing suddenly due to the impurities or protrusions on the inner wall of the casing column during isolation, causing the staff to mistakenly think that the collision and pressure are completed. This structure can improve the accuracy of collision and pressure. At the same time, this structure can use the magnetic force control detection method to avoid the problem of false touch of the detection micro switch 703 caused by the large pressure below when the isolation detection member 7 is pressed down, thereby ensuring the detection accuracy and the accurate and reasonable structural control. When the bridge plug shaft 201 touches the top of the lifting column 501, the magnetic force of the docking magnet 702 can drive the separation detection column 701 to move downward and lengthen the anti-false touch tension spring 704. At this time, the detection micro switch 703 is also driven downward and no longer squeezes the inside of the bridge plug shaft 201. At this time, the detection micro switch 703 can be energized to control the buzzer 305 to sound an alarm prompt, which also prompts the positioning thorn block 203 to stably insert the positioning groove 502 to ensure the isolation quality.

[0040] The working principle of this embodiment is as follows: first, the top of the isolation connection tube 101 is threadedly connected to the bottom of the casing column, and the bottom of the isolation connection tube 101 is threadedly connected to the top of the floating shoe. A clamp is used to connect one end of the detection lead-out line 304 to the mud grouting pipe. As the grouting proceeds, the bridge plug shaft 201 can be inserted into the casing column in conjunction with the bridge plug rubber sleeve 202. Under the action of pressure, cement can be pushed out. When the bridge plug shaft 201 is in place, it will touch the lifting column 501. At this time, the pressure suddenly increases, which is also called collision pressure. At this time, the positioning spring 10 5, the isolation positioning pin 104 can slide into the positioning groove 502, and the thorn-shaped structure can be used to achieve one-way positioning. The subsequent staff can detect the pressure and maintain the pressure. The connecting column 301 can be reused. After the cement packing is solidified, the drilling drill bit can be used to crush the structure inside the packing connecting tube 101; under the advancement of the bridge plug shaft 201, the lifting column 501 can be squeezed to control the advancement of the lifting column 501, and the guiding spiral groove 5011 can be used to move the guiding steel ball 405, and the spiral groove 5011 can be used to move the guiding steel ball 405. The spiral guide spiral groove 5011 can control the rotating cylinder 403, drive the isolation rotating shaft 401 to rotate together, and control the rotation of the graded isolation plate 402. At this time, the through holes on the graded isolation plate 402 are staggered with the through holes on the fixed isolation block 102 to achieve closure. When the lifting column 501 is pressed down, it can drive the floating shoe isolation shaft 601 to move down together, drive the valve core isolation cover 602 to close the valve core of the floating shoe, and achieve the close-fitting work. When the bridge plug shaft 201 is pressed down, it can drive the separation detection column 701 When the bridge plug shaft 201 moves downward together, when it touches the top of the lifting column 501, the magnetic force of the docking magnet 702 can drive the separation detection column 701 to move downward, lengthening the anti-mistouch tension spring 704. At this time, the detection microswitch 703 is also driven to move downward and no longer squeezes the inside of the bridge plug shaft 201. At this time, the detection microswitch 703 can be energized to control the buzzer 305 to sound an alarm. After the cement injection is completed, the electromagnet 303 can be powered off, and the connecting column 301 can be taken out to complete the cement injection and sealing work.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drillable impact joint, comprising an isolation mounting member (1), on which a bridge plug propulsion member (2) is mounted, characterized in that: The bridge plug propulsion member (2) is used to propel cement slurry; a detection power connection member (3) is installed on the bridge plug propulsion member (2); A multi-stage horizontal sealing member (4) is installed on the isolation mounting member (1); the multi-stage horizontal sealing member (4) is used to rotate inside the isolation mounting member (1); The isolation mounting member (1) is provided with a collision and pressure driving member (5), and the collision and pressure driving member (5) is used to drive the multi-stage horizontal sealing member (4) to rotate; A float shoe isolating member (6) is installed on the impact pressure driving member (5); the float shoe isolating member (6) is used to close the valve core of the cementing float shoe; The isolation installation component (1) is provided with a sealing in place detection component (7); the sealing in place detection component (7) is used to detect whether the bridge plug propulsion component (2) is in place; The isolation mounting component (1) comprises: an isolation connection tube (101), a fixed isolation block (102) and a sliding connection block (103); the upper end of the isolation connection tube (101) is provided with an internal thread, and the lower end of the isolation connection tube (101) is provided with an external thread; the fixed isolation block (102) is fixedly installed inside the isolation connection tube (101), and the fixed isolation block (102) is provided with four through holes; the sliding connection block (103) is fixedly sleeved on the isolation connection tube (101); the sliding connection block (103) is fixedly installed on the fixed isolation block (102); the sliding connection block (103) is provided with four through holes; the sliding connection block (103) is provided with a hexagonal hole.

2. A drillable pressure joint according to claim 1, characterized in that: The isolation mounting member (1) further comprises: an isolation positioning pin (104) and a positioning spring (105); six isolation positioning pins (104) are provided, and the six isolation positioning pins (104) are respectively slidably mounted on the inner side of the sliding connection block (103); six positioning springs (105) are sleeved inside the sliding connection block (103); the ends of the six positioning springs (105) are respectively fixedly mounted on the inner side of the sliding connection block (103), and the other ends of the six positioning springs (105) are fixedly mounted on the tail of the isolation positioning pin (104); and the ends of the isolation positioning pins (104) are inclined structures.

3. A drillable pressure joint according to claim 2, characterized in that: The bridge plug propulsion member (2) comprises: a bridge plug shaft (201), an electric coil (2011), a bridge plug rubber sleeve (202), a positioning spike block (203) and an anti-drop spring (204); the bridge plug shaft (201) is located inside the packing connection tube (101); the bridge plug rubber sleeve (202) is sleeved on the bridge plug shaft (201); the bridge plug rubber sleeve (202) is used to be sleeved on the inside of the packing connection tube (101); four positioning spike blocks (203) are slidably mounted on the bottom of the bridge plug shaft (201) , and the ends of the four positioning spike blocks (203) are respectively spike structures; an anti-slip spring (204) is slidably installed on the bridge plug shaft (201); the end of the anti-slip spring (204) is connected to the side of the positioning spike block (203), and the other end of the anti-slip spring (204) is connected to the end of the bridge plug shaft (201); two power rings (2011) are fixedly installed on the top of the bridge plug shaft (201); the outer ring of the bridge plug rubber sleeve (202) is provided with an inclined groove; the bridge plug propulsion member (2) is used to propel cement.

4. A drillable press joint according to claim 3, characterized in that: The detection power connection part (3) comprises: a connection column (301), a power connection docking ring (302) and an electromagnet (303); the connection column (301) is slidably plugged on the bridge plug shaft (201); two power connection docking rings (302) are fixedly installed on the connection column (301), and the two power connection docking rings (302) are respectively fitted and connected to two power connection rings (2011); the connection column (301) is fixedly embedded with an electromagnet (303), and the electromagnet (303) magnetically attracts the bridge plug shaft (201).

5. A drillable press joint according to claim 4, characterized in that: The detection electrical connection part (3) further comprises: a detection lead wire (304) and a buzzer (305); the detection lead wire (304) is fixedly mounted on the connection column (301); a buzzer (305) is mounted on the detection lead wire (304); the buzzer (305) is used to prompt that the packing is in place; and the end of the detection lead wire (304) is used to be mounted on a mud grouting pipe.

6. A drillable press joint according to claim 5, characterized in that: The multi-stage horizontal isolation element (4) comprises: an isolation rotating shaft (401), a graded isolation plate (402), a rotating cylinder (403), a pressure spring (404) and a guide steel ball (405); the isolation rotating shaft (401) is rotatably mounted on a fixed isolation block (102); a row of graded isolation plates (402) is fixedly mounted on the isolation rotating shaft (401), and a row of graded isolation plates (402) are respectively rotatably sleeved on the fixed isolation blocks (102); a row of graded isolation plates (402) are respectively provided with four through holes; the rotating cylinder (403) is fixedly mounted on the isolation rotating shaft (401); a pressure spring (404) is sleeved inside the rotating cylinder (403); six guide steel balls (405) are fixedly mounted on the rotating cylinder (403); the graded isolation plates (402) are used to isolate cement slurry.

7. A drillable pressure joint according to claim 6, characterized in that: The impact driving member (5) comprises: a lifting column (501), a guide spiral groove (5011), a plug groove (5012) and a positioning groove (502); the lifting column (501) is slidably mounted on the sliding connection block (103); six guide spiral grooves (5011) are provided inside the lifting column (501), and the guide spiral grooves (5011) are spiral structures; the lifting column (501) is slidably sleeved on the rotating cylinder (403); the six guide steel balls (405 ) are respectively located inside the six guiding spiral grooves (5011); six plug-in grooves (5012) are provided on the lifting column (501), and the six plug-in grooves (5012) are respectively aligned with the six isolation positioning pins (104); a positioning groove (502) is provided on the top of the lifting column (501); the lifting column (501) is of a hexagonal structure; the impact spring (404) is located on the inner side of the lifting column (501); and four positioning thorn-shaped blocks (203) are inserted into the positioning groove (502).

8. The drillable pressure joint according to claim 7, characterized in that: The float shoe isolation member (6) comprises: a float shoe isolation shaft (601) and a valve core isolation cover (602); the float shoe isolation shaft (601) is fixedly mounted on the bottom of the lifting column (501); the float shoe isolation shaft (601) is slidably sleeved on the isolation rotating shaft (401); a valve core isolation cover (602) is fixedly mounted on the bottom of the float shoe isolation shaft (601); the valve core isolation cover (602) is used to cover and buckle on the float shoe.

9. The drillable pressure joint according to claim 7, characterized in that: The sealing in place detection member (7) comprises: a separation detection column (701) and a docking magnet (702); the separation detection column (701) is slidably sleeved on the bottom of the bridge plug shaft (201); a docking magnet (702) is fixedly installed on the bottom of the separation detection column (701), and the docking magnet (702) is used to magnetically attract the top of the lifting column (501).

10. A drillable press joint according to claim 9, characterized in that: The sealing in place detection member (7) further comprises: a detection micro switch (703) and an anti-miscontact tension spring (704), wherein the detection micro switch (703) is fixedly mounted on the separation detection column (701); the end of the detection micro switch (703) is attached to the inside of the bridge plug shaft (201); the inside of the bridge plug shaft (201) is fixedly mounted with an anti-miscontact tension spring (704), and the end of the anti-miscontact tension spring (704) is connected to the separation detection column (701); the detection micro switch (703), the power connection ring (2011), the power connection butt ring (302), the detection lead wire (304) and the buzzer (305) are connected in series with a power supply.

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