Drill bit fishing device for petroleum drilling

Abstract

The invention provides a drill bit salvaging device for petroleum drilling, and belongs to the technical field of drill bit salvaging, the drill bit salvaging device comprises a rope body, a supporting plate, a first driving assembly, a second driving assembly, a drill rod and a magnetic suction plate, one end of the rope body is connected with the supporting plate, the other end of the rope body is connected with hoisting equipment, and the magnetic suction plate is arranged below the supporting plate; the first driving assembly is arranged on the supporting plate and used for adsorbing a drill bit, the drill rod is arranged on the lower side of the supporting plate, the second driving assembly is arranged at one end of the drill rod and used for driving the drill rod to rotate, and the first driving assembly is installed on the supporting plate and used for driving the drill rod to move into a rock stratum around the drill bit. Compared with the prior art, when the fractured drill bit in the hoistway is fished, drilling loosening treatment can be conducted on a rock stratum where the fractured drill bit is stuck, so that the stuck state of the fractured drill bit is relieved, the convenience in the fractured drill bit fishing process is improved, and the fishing effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of drill bit salvaging, in particular to a drill bit salvaging device for oil drilling. Background Art

[0002] At present, during the drilling process of oil wells, the drill bit usually breaks due to the high hardness of the rock strata being drilled. The broken drill bit is stranded inside the drilled well. In order to ensure the continuation of construction and based on resource recovery considerations, the broken drill bit needs to be salvaged.

[0003] In the prior art, the salvage of broken drill bits is mostly done by manual salvage down the well or with the help of magnetic suction equipment. Since the drill bit is broken because it is squeezed and stuck by hard rock formations, the broken drill bit is stuck inside the wellbore. Therefore, whether it is manual salvage down the well or salvage with the help of magnetic suction equipment, the salvage effect is not ideal. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a drill bit fishing device for oil drilling.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A drill bit fishing device for oil drilling comprises a rope body, a support plate, a first drive assembly, a second drive assembly, a drill rod and a magnetic suction plate.

[0007] One end of the rope is connected to the support plate, and the other end is connected to the lifting equipment.

[0008] The magnetic plate is arranged below the support plate and is used to absorb the drill bit.

[0009] The drill rod is arranged at the lower side of the support plate, and the second driving assembly is arranged at one end of the drill rod to drive the drill rod to rotate.

[0010] The first driving assembly is mounted on the support plate and is used to drive the drill rod to move into the rock formation around the drill bit so as to drill the rock formation that causes the drill bit to get stuck.

[0011] As a further improvement of the present invention: the first driving assembly includes a first motor, a first ring plate, a screw rod and a diagonal support rod,

[0012] The first motor is fixedly mounted on the support plate, one end of the screw is connected to the output end of the first motor, and the other end is connected to the magnetic plate, the first ring plate is sleeved on the outside of the screw and cooperates with the screw thread, one end of the diagonal support rod is connected to the first ring plate, and the other end is connected to the drill rod.

[0013] As a further improvement of the present invention: a second ring plate is further provided outside the screw rod below the first ring plate, a telescopic rod is provided on the side wall of the second sliding support plate, and one end of the telescopic rod away from the second ring plate is connected to the drill bit.

[0014] The second driving assembly includes a driving rod gear, a transmission gear, an L-shaped bracket plate, a second motor and a supporting sleeve.

[0015] One end of the L-shaped bracket plate is fixedly connected to the telescopic rod, and the other end is fixedly connected to the support sleeve. The support sleeve is fixedly arranged at one end of the telescopic rod away from the second ring plate. The support sleeve is vertically distributed. The second motor is fixedly installed at the bottom of the L-shaped bracket plate.

[0016] The driving gear is installed at the output end of the second motor, and the transmission gear is meshingly arranged on one side of the driving gear. A rotating shaft is fixedly arranged on the upper end of the drill rod, and the upper end of the rotating shaft passes through the supporting sleeve and is fixedly connected to the transmission gear. The rotating shaft is rotatably matched with the supporting sleeve, and one end of the diagonal support rod is hingedly connected to the first ring plate, and the other end is hingedly connected to the L-shaped bracket plate.

[0017] As a further improvement of the present invention: a guide rod is fixedly provided at the bottom of the support plate, and one end of the guide rod away from the support plate vertically penetrates the first ring plate and the second ring plate and movably cooperates with the first ring plate and the second ring plate.

[0018] As a further improvement of the present invention: a limiting assembly is also provided on the upper part of the second ring plate. When the first ring plate moves downward along the outside of the screw rod and thereby drives the drill rod to move horizontally along the inside of the wellbore, the limiting assembly is used to limit the second ring plate and the guide rod to be integrated as one.

[0019] As a further improvement of the present invention: a triangular block is fixedly arranged at the bottom of the first ring plate, a limited insertion hole is provided on the side wall of the guide rod, and a slide rail is fixedly arranged at the upper part of the second ring plate.

[0020] The limiting assembly includes a sliding support plate, a limiting rod, a second elastic member and a stopper.

[0021] The sliding support plate is arranged on one side of the guide rod and slidingly cooperates with the slide rail. One end of the limiting plug rod is fixedly connected to the sliding support plate, and the other end extends into the inside of the limiting plug hole. The stop block is fixedly arranged on the upper part of the second ring plate. One end of the second elastic member is connected to the stop block, and the other end is connected to the sliding support plate, so as to provide elastic support for the sliding support plate.

[0022] As a further improvement of the present invention: a concave hole is provided in the upper portion of the first ring plate at the side of the guide rod, a wedge block is movably inserted into the concave hole, the upper end of the wedge block extends to above the first ring plate, and a first elastic member for providing elastic support to the wedge block is provided inside the concave hole.

[0023] As a further improvement of the present invention: the first elastic member and the second elastic member are springs or metal springs.

[0024] As a further improvement of the present invention: a protective box is fixedly provided on the upper part of the support plate, the first motor is installed inside the protective box, and a plurality of fixing components are provided on the upper part of the support plate, and the fixing components are used to fix the support plate on the inner wall of the well.

[0025] As a further improvement of the present invention: the fixing assembly includes a top support rod and a hydraulic cylinder, the hydraulic cylinder is fixedly arranged on the upper edge of the support plate, and the top support rod is installed on the output end of the hydraulic cylinder.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] In the embodiment of the present invention, when it is necessary to salvage the broken drill bit, the lifting equipment can be used to lower the rope body, and the rope body drives the support plate, the first drive assembly, the second drive assembly, the drill rod and the magnetic plate to move as a whole to the inside of the well. When the magnetic plate contacts the broken drill bit, the second drive assembly drives the drill rod to rotate, and at the same time the first drive assembly drives the drill rod to move, so that the drill rod drills into the rock formation around the broken drill bit, and then the rock formation that causes the broken drill bit to be stuck is drilled, so that the rock formation that causes the broken drill bit to be stuck becomes loose, thereby releasing the stuck state of the broken drill bit. The broken drill bit is in the state, and then the magnetic suction plate absorbs the broken drill bit. Finally, the rope body is lifted by the lifting equipment. The rope body pulls the supporting plate, the first driving assembly, the second driving assembly, the drill rod and the magnetic suction plate as a whole out of the wellbore. The magnetic suction plate brings the broken drill bit out of the wellbore, thereby completing the salvage of the broken drill bit. Compared with the prior art, when salvaging the broken drill bit in the wellbore, drilling relaxation treatment can be performed on the rock formation that causes the broken drill bit to be stuck, thereby releasing the stuck state of the broken drill bit, thereby improving the convenience of the broken drill bit salvage process and improving the salvage effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a drill bit salvage device for oil drilling in a working state;

[0029] Figure 2 A schematic diagram of the structure of a drill bit salvage device for oil drilling Figure 1 ;

[0030] Figure 3 A schematic diagram of the structure of a drill bit salvage device for oil drilling Figure 2 ;

[0031] Figure 4 for Figure 2 A magnified schematic diagram of the middle A area;

[0032] Figure 5 for Figure 2 A magnified schematic diagram of the middle B area;

[0033] Figure 6 for Figure 2 Enlarged schematic diagram of the middle C area;

[0034] Figure 7 for Figure 3 The enlarged schematic diagram of the D area in the middle;

[0035] In the figure: 10-rope body, 20-fixed component, 201-top support rod, 202-hydraulic cylinder, 30-support plate, 301-protection box, 302-guide rod, 40-first drive component, 401-first ring plate, 402-screw rod, 403-second ring plate, 404-oblique support rod, 405-telescopic rod, 406-wedge block, 407-concave hole, 408-first elastic member, 409-slide rail, 410-triangle block, 50-second drive component, 501-drive gear, 502-transmission gear, 503-L-type bracket plate, 504-second motor, 505-support sleeve, 60-drill rod, 601-rotating shaft, 70-magnetic plate, 80-limiting component, 801-sliding support plate, 802-limiting plug rod, 803-second elastic member, 804-block. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] See also Figure 1 , Figure 2 as well as Figure 3 The present embodiment provides a drill bit salvaging device for oil drilling, including a rope body 10, a support plate 30, a first drive assembly 40, a second drive assembly 50, a drill rod 60 and a magnetic plate 70. One end of the rope body 10 is connected to the support plate 30, and the other end is connected to a lifting device (not shown in the figure). The magnetic plate 70 is arranged below the support plate 30 for adsorbing the drill bit. The drill rod 60 is arranged on the lower side of the support plate 30. The second drive assembly 50 is arranged at one end of the drill rod 60 for driving the drill rod 60 to rotate. The first drive assembly 40 is installed on the support plate 30 for driving the drill rod 60 to move to the rock formation around the drill bit to drill the rock formation that causes the drill bit to get stuck.

[0041] When it is necessary to salvage the broken drill bit, the rope body 10 can be lowered by using a lifting device, and the rope body 10 drives the support plate 30, the first drive assembly 40, the second drive assembly 50, the drill rod 60 and the magnetic plate 70 to move as a whole to the inside of the well. When the magnetic plate 70 contacts the broken drill bit, the second drive assembly 50 drives the drill rod 60 to rotate, and at the same time, the first drive assembly 40 drives the drill rod 60 to move, so that the drill rod 60 drills into the rock formation around the broken drill bit, and then drills the rock formation that causes the broken drill bit to be stuck, so that the rock formation that causes the broken drill bit to be stuck becomes loose, thereby releasing the stuck state of the broken drill bit, and then the magnetic plate 70 absorbs the broken drill bit, and finally the rope body 10 is lifted by the lifting device, and the rope body 10 pulls the support plate 30, the first drive assembly 40, the second drive assembly 50, the drill rod 60 and the magnetic plate 70 to move out of the well as a whole, and the magnetic plate 70 brings the broken drill bit out of the well, thereby completing the salvage of the broken drill bit.

[0042] See also Figure 1 , Figure 2 as well as Figure 3In one embodiment, the first driving assembly 40 includes a first motor, a first ring plate 401, a screw 402 and a diagonal support rod 404. The first motor is fixedly mounted on the support plate 30. One end of the screw 402 is connected to the output end of the first motor, and the other end is connected to the magnetic plate 70. The first ring plate 401 is sleeved on the outside of the screw 402 and is threadedly matched with the screw 402. One end of the diagonal support rod 404 is connected to the first ring plate 401, and the other end is connected to the drill rod 60.

[0043] When the magnetic plate 70 contacts the broken drill bit, the first motor can be used to drive the screw 402 to rotate, and the first ring plate 401 can be driven to move downward along the outside of the screw 402 through the threaded cooperation between the screw 402 and the first ring plate 401. When the first ring plate 401 moves downward, the drill rod 60 is driven downward through the diagonal support rod 404, and the drill rod 60 is driven to rotate with the help of the second drive assembly 50, so that the drill rod 60 drills into the rock formation around the broken drill bit, and then the rock formation around the broken drill bit is drilled to loosen the surrounding rock formation to release the stuck state of the broken drill bit.

[0044] See also Figure 2 as well as Figure 4 In one embodiment, a second ring plate 403 is further provided on the outside of the screw rod 402 below the first ring plate 401, a telescopic rod 405 is provided on the side wall of the second sliding support plate 403, and the end of the telescopic rod 405 away from the second ring plate 403 is connected to the drill bit 60, and the second driving assembly 50 includes a driving rod gear 501, a transmission gear 502, an L-shaped bracket plate 503, a second motor 504 and a supporting sleeve 505, one end of the L-shaped bracket plate 503 is fixedly connected to the telescopic rod 405, and the other end is fixedly connected to the supporting sleeve 505, and the supporting sleeve 505 is fixedly arranged on the telescopic rod 405 away from the second ring plate 403. At one end of the second ring plate 403, the support sleeve 505 is vertically distributed, the second motor 504 is fixedly mounted at the bottom of the L-shaped bracket plate 503, the driving gear 501 is mounted at the output end of the second motor 504, the transmission gear 502 is meshed and arranged on one side of the driving gear 501, a rotating shaft 601 is fixedly arranged on the upper end of the drill rod 60, the upper end of the rotating shaft 601 passes through the support sleeve 505 and is fixedly connected to the transmission gear 502, the rotating shaft 601 is rotatably matched with the support sleeve 505, one end of the diagonal support rod 404 is hingedly connected to the first ring plate 401, and the other end is hingedly connected to the L-shaped bracket plate 503.

[0045] When the first motor drives the screw rod 402 to rotate, thereby driving the first ring plate 401 to move downward, one end of the diagonal support rod 404 rotates relative to the first ring plate 401, and the other end rotates relative to the L-shaped bracket plate 503, thereby pushing the L-shaped bracket plate 503 to extend the telescopic rod 405. When the telescopic rod 405 extends, it pushes the supporting sleeve 505, the L-shaped bracket plate 503, the second motor 504, the driving gear 501, the transmission gear 502, the rotating shaft 601 and the drill rod 60 to move horizontally and approach the inner wall of the well. At the same time, the driving gear 501 is driven to rotate by the second motor 504, and the meshing action of the driving gear 501 and the transmission gear 502 is utilized. The rotating rod 601 is driven to rotate, thereby driving the drill rod 60 to rotate. When the rotating drill rod 60 is close to the inner wall of the wellbore, it can be vertically extended into the rock layer of the inner wall of the wellbore. Then the diagonal support rod 404 is rotated to a horizontal state and no longer rotates. At this time, the first ring plate 401 acts on the second ring plate 403, thereby driving the second ring plate 403 to move downward along the outside of the screw rod 402. When the second ring plate 403 moves downward, it drives the drill rod 60 to move vertically downward through the telescopic rod 405, the L-shaped bracket plate 503, the support sleeve 505 and the rotating shaft 601. When the drill rod 60 moves downward, it drills into the rock layer around the broken drill bit, thereby loosening the rock layer that caused the broken drill bit to be stuck.

[0046] See also Figure 1 as well as Figure 2 In one embodiment, a guide rod 302 is fixedly provided at the bottom of the support plate 30, and one end of the guide rod 302 away from the support plate 30 vertically penetrates the first ring plate 401 and the second ring plate 403 and movably cooperates with the first ring plate 401 and the second ring plate 403.

[0047] Through the active cooperation between the guide rod 302 and the first ring plate 401 and the second ring plate 403, the first ring plate 401 can be driven to move smoothly downward along the outside of the screw rod 402 during the rotation of the screw rod 402, so that the diagonal support rod 404 can smoothly push the drill rod 60 so that the drill rod 60 moves horizontally along the inside of the wellbore and then smoothly extends into the rock formation on the inner wall of the wellbore.

[0048] See also Figure 2 In one embodiment, a limiting assembly 80 is further provided on the upper portion of the second ring plate 403. When the first ring plate 401 moves downward along the outside of the screw rod 402 and thereby drives the drill rod 60 to move horizontally along the inside of the wellbore, the limiting assembly 80 is used to limit the second ring plate 403 and the guide rod 302 as a whole, thereby preventing the second ring plate 403 from being subjected to the downward pressure from the first ring plate 401 and the diagonal support rod 404 and thereby moving downward compared to the outside of the screw rod 402, so that the second ring plate 403 can provide stable support for the drill rod 60, and the diagonal support rod 404 can smoothly push the drill bit 60 to allow the drill bit 60 to move horizontally.

[0049] See also Figure 6 as well as Figure 7 In one embodiment, a triangular block 410 is fixedly provided at the bottom of the first ring plate 401, a limiting insertion hole (not shown in the figure) is provided on the side wall of the guide rod 302, and a slide rail 409 is fixedly provided on the upper part of the second ring plate 403. The limiting assembly 80 includes a sliding support plate 801, a limiting insertion rod 802, a second elastic member 803 and a stopper 804. The sliding support plate 801 is arranged on one side of the guide rod 302 and slidably cooperates with the slide rail 409. One end of the limiting insertion rod 802 is fixedly connected to the sliding support plate 801, and the other end extends into the limiting insertion hole. The stopper 804 is fixedly provided on the upper part of the second ring plate 403. One end of the second elastic member 803 is connected to the stopper 804, and the other end is connected to the sliding support plate 801, so as to provide elastic support to the sliding support plate 801.

[0050] When the first ring plate 401 moves downward along the outside of the screw rod 402 and then pushes the drill rod 60 through the diagonal support rod 404 so that the drill rod 60 is horizontally close to the inner wall of the well, the guide rod 302 and the second ring plate 403 can be fixed as a whole through the plug-in cooperation of the limit plug rod 802 and the limit plug hole, and the second ring plate 403 can provide stable support for the drill rod 60, so that the diagonal support rod 404 can smoothly push the drill rod 60 so that the drill rod 60 is horizontally close to the inner wall of the well and vertically extends into the rock layer of the inner wall of the well; when the drill rod 60 vertically extends into the inner wall of the well After the first ring plate 401 is in the rock layer, the first ring plate 401 moves to the top of the second ring plate 403. At this time, the diagonal support rod 404 rotates to a horizontal state and stops rotating. The inclined surface of the triangular block 410 at the bottom of the first ring plate 401 acts on the upper end of the sliding support plate 801, thereby pushing the sliding support plate 801 so that the sliding support plate 801 slides along the upper part of the slide rail 409. When the sliding support plate 801 slides, it drives the limiting plug rod 802 to move. One end of the limiting plug rod 802 moves out from the inside of the limiting plug hole to release the fixing state between the second ring plate 403 and the guide rod 302. Then, as the first ring plate 401 continues to move downward, the first ring plate 401 presses the sliding support plate 801 and then drives the second ring plate 403 to move downward synchronously, and the second ring plate 403 drives the drill rod 60 to move downward through the telescopic rod 405, the L-shaped bracket plate 503 and the support sleeve 505, and the drill rod 60 drills into the rock formation around the broken drill bit to drill and loosen the rock formation that causes the broken drill bit to be stuck, thereby releasing the stuck state of the broken drill bit, making it easy to salvage the broken drill bit; After entering the surrounding rock formation, the first ring plate 401 can slide away from the lower end of the guide rod 302, and the lower end of the guide rod 302 is located above the first ring plate 401. At the same time, the bottom of the second ring plate 403 acts on the magnetic plate 70. As the screw 402 continues to rotate, the first ring plate 401, the second ring plate 403 and the drill rod 60 no longer move downward, and the screw 402 drives the drill rod 60 to move in a circle around the broken drill bit through the second ring plate 403, thereby comprehensively drilling and loosening the rock formation around the broken drill bit, thereby making the broken drill bit easier to salvage.

[0051] See also Figure 5 In one embodiment, a recessed hole 407 is provided on the upper portion of the first ring plate 401 and located on the side of the guide rod 302. A wedge block 406 is movably inserted into the recessed hole 407. The upper end of the wedge block 406 extends to above the first ring plate 401. A first elastic member 408 for providing elastic support to the wedge block 406 is provided inside the recessed hole 407.

[0052] After the first ring plate 401 slides off the lower end of the guide rod 302, as the screw 402 drives the drill rod 60 to perform a circular motion around the broken drill bit, the lower end of the guide rod 302 rotates along the top of the first ring plate 401. When the guide rod 302 rotates, it can act on the inclined surface of the wedge block 406, thereby pushing the wedge block 406 to move into the corresponding recessed hole 407. The first elastic member 408 is compressed. After the guide rod 302 passes the position of the wedge block 406, the first elastic member 408 pushes the wedge block 406 to move up, so that the upper end of the wedge block 406 extends above the first ring plate 401 again; after the drill rod 60 has completed drilling and loosening the rock formation around the broken drill bit, the first motor drives the screw 402 to rotate in the opposite direction. When the screw 402 rotates in the opposite direction, it drives the first ring plate 401 and the second ring plate 403 to rotate in the opposite direction as a whole. The first ring plate 40 Compared with the reverse rotation of the guide rod 302, when the guide rod 302 acts on the vertical surface of the wedge block 406, the first ring plate 401 stops rotating in the reverse direction, and then the screw rod 402 can be matched with the first ring plate 401 in the reverse thread. Under the reverse rotation of the screw rod 402, the first ring plate 401 moves upward along the outside of the screw rod 402, and the guide rod 302 passes through the first ring plate 401 again. When the first ring plate 401 moves upward, the second ring plate 403 is pulled upward by the diagonal support rod 404, the L-shaped bracket plate 503 and the telescopic rod 405, and the guide rod 302 passes through the second ring plate 403 again. When the second ring plate 403 moves upward to the initial position, the second elastic member 803 pushes the sliding support plate 801, so that the limiting plug rod 802 is reinserted into the limiting plug hole on the side wall of the guide rod 302, so as to define the second ring plate 403 and the guide rod 302 as one body again.

[0053] In one embodiment, the first elastic member 408 and the second elastic member 803 may be springs or metal springs, which are not limited herein.

[0054] See also Figure 1 In one embodiment, a protective box 301 is fixedly provided on the upper part of the support plate 30, the first motor is installed inside the protective box 301, and a plurality of fixing components 20 are provided on the upper part of the support plate 30. The fixing components 20 are used to fix the support plate 30 on the inner wall of the shaft, thereby ensuring that the first drive component 40 and the second drive component 50 can operate stably.

[0055] See also Figure 1 In one embodiment, the fixing assembly 20 includes a top support rod 201 and a hydraulic cylinder 202 . The hydraulic cylinder 202 is fixedly disposed on the upper edge of the support plate 30 , and the top support rod 201 is installed at the output end of the hydraulic cylinder 202 .

[0056] After the magnetic plate 70 contacts the broken drill bit, the hydraulic cylinder 202 drives the support rod 201 to extend, so that the support rod 201 is supported on the inner wall of the wellbore, thereby fixing the support plate 30 to ensure that the first drive assembly 40 and the second drive assembly 50 can operate stably.

[0057] The working principle of the present invention is as follows:

[0058] First, use a lifting device to lower the rope body 10, and the rope body 10 drives the support plate 30 and the magnetic plate 70 to move downward along the inside of the well. When the magnetic plate 70 contacts the broken drill bit, start the first motor and the second motor 504, and the second motor 504 drives the driving gear 501 to rotate, and the meshing action of the driving gear 501 and the transmission gear 502 drives the rotating shaft 601 and the drill rod 60 to rotate, and the first motor drives the screw rod 402 to rotate, and the first ring plate 401 is driven to move downward through the threaded cooperation of the screw rod 402 and the first ring plate 401. When the first ring plate 401 moves downward, the L-shaped bracket plate 503 is pushed by the diagonal support rod 404 to extend the telescopic rod 405, and the L-shaped bracket plate 503 drives the second motor 504, the driving gear 501, the transmission gear 502, the rotating shaft 601 and the drill rod 60 to move horizontally along the inside of the wellbore synchronously, and the drill rod 60 horizontally approaches the inner wall of the wellbore and vertically extends into the rock layer of the inner wall of the wellbore. Then, the inclined surface of the triangular block 410 at the bottom of the first ring plate 401 acts on the upper end of the sliding support plate 801, thereby pushing the sliding support plate 801 away from the guide rod 302, so as to bring the limiting plug rod 802 out of the limiting plug hole on the side wall of the guide rod 302, so as to release the fixed state of the second ring plate 403, and then the first ring plate 401 drives the second ring plate 403 to move downward synchronously, thereby driving the drill rod 60 to move downward, and the drill rod 60 drills into the broken drill bit. The first ring plate 401 and the second ring plate 403 are no longer moved downward, and the screw 402 drives the first ring plate 401 and the second ring plate 403 to rotate as a whole, thereby driving the drill rod 60 to perform a circular motion around the broken drill bit, so as to perform a comprehensive drilling and loosening treatment on the rock formation around the broken drill bit. After the drill rod 60 has finished loosening the rock formation around the broken drill bit, the first motor drives the screw 402 to rotate in the opposite direction, thereby driving the first ring plate 401 and the second ring plate 403 to rotate in the opposite direction, and the guide rod 302 is rotated. When 02 acts on the vertical surface of the wedge block 406, the first ring plate 401 stops rotating with the screw rod 402. Through the reverse thread cooperation of the screw rod 402 and the first ring plate 401, the first ring plate 401 and the second ring plate 403 move up along the outside of the screw rod 402, and the guide rod 302 passes through the first ring plate 401 and the second ring plate 403. When the second ring plate 403 moves up, it drives the drill rod 60 to move up, and the drill rod 60 moves out from the rock formation around the broken drill bit. The external lifting equipment lifts the rope body 10, thereby driving the support plate 30 and the magnetic plate 70 to move up. The magnetic plate 70 absorbs the broken drill bit to bring the broken drill bit out from the inside of the wellbore, thereby realizing automatic salvage of the broken drill bit.

[0059] In the embodiment of the present invention, when it is necessary to salvage the broken drill bit, the rope body 10 can be lowered by using a lifting device, and the rope body 10 drives the support plate 30, the first drive assembly 40, the second drive assembly 50, the drill rod 60 and the magnetic plate 70 to move as a whole to the inside of the well. When the magnetic plate 70 contacts the broken drill bit, the second drive assembly 50 drives the drill rod 60 to rotate, and at the same time the first drive assembly 40 drives the drill rod 60 to move, so that the drill rod 60 drills into the rock formation around the broken drill bit, and then the rock formation that causes the broken drill bit to be stuck is drilled, so that the rock formation that causes the broken drill bit to be stuck becomes loose, thereby releasing the broken drill bit. The broken drill bit is in a stuck state, and then the magnetic suction plate 70 absorbs the broken drill bit. Finally, the rope body 10 is lifted by the lifting equipment, and the rope body 10 pulls the support plate 30, the first drive assembly 40, the second drive assembly 50, the drill rod 60 and the magnetic suction plate 70 as a whole out of the wellbore, and the magnetic suction plate 70 brings the broken drill bit out of the wellbore, thereby completing the salvage of the broken drill bit. Compared with the prior art, when salvaging the broken drill bit in the wellbore, the rock formation that causes the broken drill bit to be stuck can be drilled and relaxed, thereby releasing the stuck state of the broken drill bit, thereby improving the convenience of the broken drill bit salvage process and improving the salvage effect.

[0060] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

[0061] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A drill bit salvaging device for oil drilling, characterized in that: It includes a rope body, a support plate, a first drive assembly, a second drive assembly, a drill rod and a magnetic plate. One end of the rope is connected to the support plate, and the other end is connected to the lifting equipment. The magnetic plate is arranged below the support plate and is used to absorb the drill bit. The drill rod is arranged at the lower side of the support plate, and the second driving assembly is arranged at one end of the drill rod to drive the drill rod to rotate. The first driving assembly is mounted on the support plate and is used to drive the drill rod to move into the rock formation around the drill bit so as to drill the rock formation that causes the drill bit to get stuck.

2. A drill bit salvaging device for oil drilling according to claim 1, characterized in that: The first driving assembly includes a first motor, a first ring plate, a screw rod and a diagonal support rod. The first motor is fixedly mounted on the support plate, one end of the screw is connected to the output end of the first motor, and the other end is connected to the magnetic plate, the first ring plate is sleeved on the outside of the screw and cooperates with the screw thread, one end of the diagonal support rod is connected to the first ring plate, and the other end is connected to the drill rod.

3. The drill bit salvaging device for oil drilling according to claim 2, characterized in that: A second ring plate is further provided outside the screw rod and below the first ring plate. A telescopic rod is provided on the side wall of the second sliding support plate. One end of the telescopic rod away from the second ring plate is connected to the drill bit. The second driving assembly includes a driving rod gear, a transmission gear, an L-shaped bracket plate, a second motor and a supporting sleeve. One end of the L-shaped bracket plate is fixedly connected to the telescopic rod, and the other end is fixedly connected to the support sleeve. The support sleeve is fixedly arranged at one end of the telescopic rod away from the second ring plate. The support sleeve is vertically distributed. The second motor is fixedly installed at the bottom of the L-shaped bracket plate. The driving gear is installed at the output end of the second motor, and the transmission gear is meshingly arranged on one side of the driving gear. A rotating shaft is fixedly arranged on the upper end of the drill rod, and the upper end of the rotating shaft passes through the supporting sleeve and is fixedly connected to the transmission gear. The rotating shaft is rotatably matched with the supporting sleeve, and one end of the diagonal support rod is hingedly connected to the first ring plate, and the other end is hingedly connected to the L-shaped bracket plate.

4. A drill bit salvaging device for oil drilling according to claim 3, characterized in that: A guide rod is fixedly provided at the bottom of the support plate, and one end of the guide rod away from the support plate vertically penetrates the first ring plate and the second ring plate and movably cooperates with the first ring plate and the second ring plate.

5. The drill bit salvaging device for oil drilling according to claim 4, characterized in that: A limiting assembly is also provided on the upper portion of the second ring plate. When the first ring plate moves downward along the outside of the screw rod and drives the drill rod to move horizontally along the inside of the wellbore, the limiting assembly is used to limit the second ring plate and the guide rod to be integrated.

6. A drill bit salvaging device for oil drilling according to claim 5, characterized in that: A triangular block is fixedly arranged at the bottom of the first ring plate, a limited insertion hole is provided on the side wall of the guide rod, and a slide rail is fixedly arranged at the upper part of the second ring plate. The limiting assembly includes a sliding support plate, a limiting rod, a second elastic member and a stopper. The sliding support plate is arranged on one side of the guide rod and slidingly cooperates with the slide rail. One end of the limiting plug rod is fixedly connected to the sliding support plate, and the other end extends into the inside of the limiting plug hole. The stop block is fixedly arranged on the upper part of the second ring plate. One end of the second elastic member is connected to the stop block, and the other end is connected to the sliding support plate, so as to provide elastic support for the sliding support plate.

7. A drill bit salvaging device for oil drilling according to claim 6, characterized in that: A concave hole is provided at the upper part of the first ring plate, located on the side of the guide rod, and a wedge block is movably inserted into the concave hole. The upper end of the wedge block extends above the first ring plate, and a first elastic member for providing elastic support to the wedge block is provided inside the concave hole.

8. The drill bit salvaging device for oil drilling according to claim 7, characterized in that: The first elastic member and the second elastic member are springs or metal springs.

9. The drill bit salvaging device for oil drilling according to claim 2, characterized in that: A protection box is fixedly arranged on the upper part of the support plate, the first motor is installed inside the protection box, and a plurality of fixing components are arranged on the upper part of the support plate, and the fixing components are used to fix the support plate on the inner wall of the well.

10. The drill bit salvaging device for oil drilling according to claim 9, characterized in that: The fixing assembly includes a top support rod and a hydraulic cylinder. The hydraulic cylinder is fixedly arranged on the upper edge of the support plate, and the top support rod is installed on the output end of the hydraulic cylinder.

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