A spliced expandable wellbore device for oil drilling and production

Abstract

The present invention discloses a spliced expansion wellbore device for oil drilling and production, which relates to the technical field of oil drilling and production equipment. It includes a fixed plate, on which a central circular groove is provided. At the bottom of the fixed plate, pressing hydraulic rods are evenly arranged. The fixed plate is fixedly installed around the oil hole. A splicing cylinder is inserted into the oil hole. A conical head is arranged at the bottom of the splicing cylinder. An upper connecting ring and a lower connecting ring are respectively arranged at both ends of the splicing cylinder. An insertion hole and a locking groove are arranged on the upper connecting ring, and the insertion hole is connected to the locking groove. The pressing hydraulic rod acts on the upper connecting ring. Locking holes are also evenly arranged on the upper connecting ring. Clamping rods are evenly arranged at the bottom of the lower connecting ring. A contraction section is arranged in the middle of the splicing cylinder, and an expansion positioning mechanism is arranged on the contraction section. The present invention realizes the expansion positioning between the splicing cylinder and the inner wall of the oil hole driven by the driving component, and combines the locking component to maintain the expansion positioning state.

Description

Technical Field

[0001] The present invention relates to the technical field of oil drilling and production equipment, and specifically to a spliced expandable wellbore device for oil drilling and production. Background Art

[0002] During the oil drilling and production process, the oil pipe is inserted after drilling a hole on the ground for exploitation. During the installation of the oil pipe, the unstable installation of the oil pipe is caused by the large gap between the wellbore and the oil pipe, thus affecting oil exploitation. Therefore, an expandable wellbore structure for oil drilling is required to install the oil pipe and facilitate oil exploitation.

[0003] The existing expandable wellbore structure cannot be extended according to the actual usage situation during use. When the oil pipe is extended for use, the outer wall of the oil pipe is easily worn due to the lack of a protection structure, accelerating the wear rate of the oil pipe. Summary of the Invention

[0004] The purpose of the present invention is to provide a spliced expandable wellbore device for oil drilling and production to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution:

[0006] A spliced expandable wellbore device for oil drilling and production, including a fixing plate, a central circular groove is provided on the fixing plate, a pressing hydraulic rod is evenly arranged at the bottom of the fixing plate, the fixing plate is fixedly installed around the oil hole, a splicing cylinder is inserted into the oil hole, a conical head is arranged at the bottom of the splicing cylinder, an upper connecting ring and a lower connecting ring are respectively arranged at both ends of the splicing cylinder, an insertion hole and a locking groove are arranged on the upper connecting ring, the insertion hole is connected to the locking groove, the pressing hydraulic rod acts on the upper connecting ring, locking holes are also evenly arranged on the upper connecting ring, clamping rods and clamping flanges are evenly arranged at the bottom of the lower connecting ring, rotating flanges are evenly arranged on the upper side of the lower connecting ring, the lower connecting ring is rotatably connected to the splicing cylinder through a T-shaped connecting block, a contraction section is arranged in the middle of the splicing cylinder, and an expansion positioning mechanism is arranged on the contraction section.

[0007] The expansion positioning mechanism includes mounting grooves uniformly arranged on the contraction section. An arc-shaped groove is provided at the bottom of the mounting groove. The center of the arc-shaped groove coincides with the axis of the splicing cylinder. An arc-shaped slider is slidably mounted in the arc-shaped groove. A connecting column is provided on the arc-shaped slider. A swing rod is rotatably mounted on the connecting column. A connecting shaft is provided at the end of the swing rod. A rotating rod is arranged in the contraction section. A positioning frame is rotatably mounted on the rotating rod. The end of the positioning frame is rotatably connected to the swing rod through the connecting shaft. A driving component is cooperatively arranged in the splicing cylinder. The driving component acts on the side of the connecting column, driving the connecting column and the arc-shaped slider to slide along the arc-shaped groove, and pushing the positioning frame to open.

[0008] As a further scheme of the present invention: The driving component includes a driving disk. Mounting grooves are uniformly arranged on the edge of the driving disk. A swing rod is rotatably mounted in the mounting groove. The rotation range of the swing rod is ninety degrees. An installation plate is arranged at the part of the driving disk inside the swing rod. A pushing spring is fixedly connected to the installation plate. The other end of the pushing spring is suspended. The driving disk cooperates with the contraction section. A rotating shaft is connected to the driving disk. The rotating shaft is connected to a rotating motor. The rotating motor is fixedly connected to the fixed plate.

[0009] As a further scheme of the present invention: A vertical alignment groove is provided on the contraction section. The width of the alignment groove is equal to the width of the swing rod. A circular chamfer is provided at the opening of the alignment groove.

[0010] As a further scheme of the present invention: A locking component is arranged in the mounting groove. The locking component includes an arc-shaped push rod fixedly arranged on the connecting column. The center of the arc-shaped push rod coincides with the axis of the splicing cylinder. A positioning block is connected to the end of the arc-shaped push rod. A first groove is provided at the end of the positioning block. A second groove is provided at the bottom of the positioning block. A positioning groove is provided at the end of the mounting groove away from the rotating rod. A plugging rod is vertically mounted in the positioning groove. A locking block is provided on the plugging rod. The locking block cooperates with the second groove. A pressing groove is provided at the bottom of the positioning groove. A return spring two is sleeved on the part of the plugging rod between the locking block and the pressing groove. A return spring one is arranged in the arc-shaped groove.

[0011] As a further scheme of the present invention: An auxiliary recovery component is also arranged in the mounting groove. The auxiliary recovery component includes a rotating rod rotatably mounted on the contraction section. A winding drum is arranged on the part of the rotating rod in the contraction section. A pulling rope is wound on the winding drum. An extension section is provided on the upper side of the connecting column. The end of the pulling rope is connected to the extension section.

[0012] As a further solution of the present invention: connecting disks are arranged at both ends of the rotating rod and the inserting rod in the adjacent splicing cylinder, and the connecting disks are fixedly connected by connecting bolts.

[0013] As a further solution of the present invention: ball groove frames are evenly arranged on the inner side of the contraction section, rolling balls are installed in the ball groove frames, the ball groove frames are connected to the telescopic columns, and the telescopic columns are arranged in the contraction section.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1) By arranging a contraction section in the splicing cylinder, combining with the installation groove arranged in the contraction section, arranging a rotationally installed positioning frame through the installation groove, acting on the left side of the connecting column through the driving component, driving the arc-shaped slider to slide along the arc-shaped groove, so that the swing rod swings, pushing the positioning frame to extend outwards, and clamping on the inner wall of the oil hole, performing expansion positioning between the splicing cylinder and the inner wall of the oil hole, effectively avoiding the vertical sliding of the splicing cylinder in the oil hole.

[0016] (2) By arranging a positioning groove at the end of the installation groove, combining with the installation of the inserting rod and the locking block in the positioning groove, when the driving component drives the connecting column and the arc-shaped slider to slide, the positioning frame opens. In order to keep the positioning always in an open state, an arc-shaped push rod and a positioning block are arranged on the connecting column, a first groove and a second groove are arranged on the positioning block. Before the positioning block enters the positioning groove, press the inserting rod to make the locking block enter the pressing groove. After the positioning block enters the positioning groove, release the inserting rod, and the inserting rod and the positioning block rise under the action of the second return spring and cooperate with the second groove to realize the locking of the positioning block, so as to keep the expansion open state of the positioning frame. A first return spring is arranged in the arc-shaped groove. When the locking block disengages from the positioning block, the arc-shaped slider retreats under the action of the first return spring, driving the swing rod back to the initial position and retracting the positioning frame into the contraction section, facilitating the retraction of the expansion positioning mechanism.

[0017] (3) In order to avoid the elasticity of the first return spring being insufficient to push the arc-shaped slider back to the initial end, a rotating winding drum is arranged in the installation groove, a pull rope is arranged in combination with the winding drum and connected to the elongation section on the upper side of the connecting column, and by rotating the winding drum, the connecting column is pulled back to the initial position, thereby retracting the expansion positioning mechanism to the initial position. Description of the Drawings

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is an installation schematic diagram of the fixed plate and the splicing cylinder in the present invention.

[0020] Figure 3 It is a sectional structural schematic diagram of the splicing cylinder in the present invention.

[0021] Figure 4 This is a schematic diagram of the cooperation between the expansion positioning mechanism and the contraction section in the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of the expansion positioning mechanism and the auxiliary recovery component in the present invention.

[0023] Figure 6 This is a schematic diagram of the structure of the positioning block and the locking component in the present invention.

[0024] Figure 7 This is a schematic diagram of the structure of the drive disk in the present invention.

[0025] In the figure: 1, fixed plate; 10, central circular groove; 11, downward hydraulic rod; 2, splicing cylinder; 20, upper connecting ring; 200, insertion hole; 201, locking groove; 202, locking hole; 21, contraction section; 22, lower connecting ring; 23, T-shaped connecting block; 24, rotating flange; 25, clamping flange; 250, clamping rod; 26, installation groove; 260, arc groove; 27, alignment groove; 3, conical head; 4, expansion positioning mechanism; 40, positioning frame; 41, rotating rod; 42, arc slider; 43, connecting column; 44, swing rod; 45, arc push rod; 46, positioning block; 460, first groove; 461, second groove; 47, return spring one; 48, connecting shaft; 5, locking component; 50, positioning groove; 51, plugging rod; 52, locking block; 53, downward pressure groove; 54, return spring two; 6, auxiliary recovery component; 60, rotating rod; 61, connecting disk; 610, connecting bolt; 62, winding drum; 63, pull rope; 64, elongation section; 70, drive disk; 71, rotating shaft; 72, installation groove; 73, swing rod; 74, installation plate; 75, push spring; 80, ball groove frame; 81, ball. Specific embodiments

[0026] The technical solutions of the present invention will be further described in detail below in conjunction with specific embodiments.

[0027] Such as Figure 1 , Figure 2 , Figure 3As shown in the figure, a spliced expandable wellbore device for oil drilling and production includes a fixed plate 1. A central circular groove 10 is provided on the fixed plate 1. The bottom of the fixed plate 1 is evenly provided with downward pressure hydraulic rods 11. The fixed plate 1 is fixedly installed around the oil hole. A splicing cylinder 2 is inserted into the oil hole. A conical head 3 is provided at the bottom of the splicing cylinder 2. Upper connecting rings 20 and lower connecting rings 22 are respectively provided at both ends of the splicing cylinder 2. An insertion hole 200 and a locking groove 201 are provided on the upper connecting ring 20. The insertion hole 200 is connected to the locking groove 201. The downward pressure hydraulic rod 11 acts on the upper connecting ring 20. Locking holes 202 are also evenly provided on the upper connecting ring 20. The bottom of the lower connecting ring 22 is evenly provided with clamping rods 250 and clamping flanges 25. Rotating flanges 24 are evenly provided on the upper side of the lower connecting ring 22. The lower connecting ring 22 is rotatably connected to the splicing cylinder 2 through a T-shaped connecting block 23. A contraction section 21 is provided in the middle of the splicing cylinder 2. An expansion positioning mechanism 4 is provided on the contraction section 21.

[0028] Specifically, after drilling out the oil hole, insert the splicing cylinder 2 into the oil hole. At the same time, fixedly install the fixed plate 1 around the oil hole. Evenly set downward pressure hydraulic rods 11 through the fixed plate 1. The end of the downward pressure hydraulic rod 11 acts on the upper connecting ring 20 of the splicing cylinder 2, and pushes the splicing cylinder 2 into the oil pipe. When it is necessary to extend the oil pipe, align the clamping flanges 25 and the clamping rods 250 at the bottom of the extended splicing cylinder 2 into the insertion holes 200 of the upper connecting ring 20 of the adjacent splicing cylinder 2, and push the rotating flange 24 to make the lower connecting ring 22 rotate, so that the clamping flange 25 cooperates with the locking groove 201 to complete the splicing and locking between the splicing cylinders 2.

[0029] As Figure 4 、 Figure 5 shown in the figure, the expansion positioning mechanism 4 includes mounting grooves 26 evenly provided on the contraction section 21. An arc-shaped groove 260 is provided at the bottom of the mounting groove 26. The center of the arc-shaped groove 260 coincides with the axis of the splicing cylinder 2. An arc-shaped slider 42 is slidably installed in the arc-shaped groove 260. A connecting column 43 is provided on the arc-shaped slider 42. A swing rod 44 is rotatably installed on the connecting column 43. A connecting shaft 48 is provided at the end of the swing rod 44. A rotating rod 41 is provided in the contraction section 21. A positioning frame 40 is rotatably installed on the rotating rod 41. The end of the positioning frame 40 is rotatably connected to the swing rod 44 through the connecting shaft 48. A driving assembly is cooperatively provided in the splicing cylinder 2. The driving assembly acts on the side of the connecting column 43, drives the connecting column 43 and the arc-shaped slider 42 to slide along the arc-shaped groove 260, and pushes the positioning frame 40 to open.

[0030] Specifically, a contraction section 21 is provided inside the splicing cylinder 2. An installation groove 26 is provided in combination with the contraction section 21. A positioning frame 40 rotatably installed is provided through the installation groove 26. The left side of the connecting column 43 is acted on by a driving component to drive the arc-shaped slider 42 to slide along the arc-shaped groove 260, so that the swing rod 44 swings, pushing the positioning frame 40 to extend outwards and be clamped on the inner wall of the oil hole, thereby clamping and positioning the splicing cylinder 2 and preventing the splicing cylinder 2 from sliding vertically in the oil hole.

[0031] Furthermore, as Figure 7 shown, the driving component includes a driving disk 70. Installation grooves 72 are evenly provided on the edge of the driving disk 70. A swing rod 73 is rotatably installed in the installation groove 72. The rotation range of the swing rod 73 is 90 degrees. A mounting plate 74 is provided at the part of the driving disk 70 inside the swing rod 73. A pushing spring 75 is fixedly connected to the mounting plate 74. The other end of the pushing spring 75 is installed in a suspended manner. The driving disk 70 cooperates with the contraction section 21. A rotating shaft 71 is connected to the driving disk 70. The rotating shaft 71 is connected to a rotating motor, and the rotating motor is fixedly connected to the fixing plate 1.

[0032] Specifically, after the splicing cylinder 2 carrying the expansion positioning mechanism 4 is pushed into the oil hole under the action of the pressing hydraulic rod 11, the driving disk 70 is inserted through the top fixing plate 1. The driving disk 70 drives the swing rod 73 to move downwards. Under the action of the pushing spring 75, when the driving disk 70 reaches the position of the installation groove 26, the swing rod 73 falls into the installation groove 26 and is in a horizontal state. At this time, the driving disk 70 is driven to rotate, and the swing rod 73 acts on the left side of the connecting column 43, pushing the connecting column 43 to slide along the arc-shaped groove 260, so that the swing rod 44 swings outwards, and then the positioning frame 40 is pushed to open outwards, completing the expansion positioning operation.

[0033] Before the driving component acts, it is necessary to first fixedly connect the splicing cylinder 2 and the fixing plate 1 through the locking hole 202 to prevent the splicing cylinder 2 from rotating synchronously when the driving component acts.

[0034] More specifically, the function of setting the pushing spring 75 and the mounting plate 74 is to prevent the swing rod 73 from swinging towards the inside of the driving disk 70, ensuring that the swing rod 73 can fall into the installation groove 26 under the action of the pushing spring 75 when it reaches the position of the installation groove 26.

[0035] Furthermore, as Figure 4 shown, a vertical alignment groove 27 is provided on the contraction section 21. The width of the alignment groove 27 is equal to the width of the swing rod 73. A circular chamfer is provided at the opening of the alignment groove 27.

[0036] Specifically, in order to ensure that the swing rod 73 can accurately fall on Figure 5At the left position of the connecting column 43 shown, an alignment groove 27 is provided on the contraction section 21, so that the swing rod 73 slides downward along the alignment groove 27 and lands on the left part of the connecting column 43 under the action of the pushing spring 75 when it reaches the installation groove 26.

[0037] Furthermore, as Figure 6 shown, a locking assembly 5 is provided in the installation groove 26. The locking assembly 5 includes an arc-shaped push rod 45 fixedly arranged on the connecting column 43. The center of the arc-shaped push rod 45 coincides with the axis of the splicing cylinder 2. The end of the arc-shaped push rod 45 is connected with a positioning block 46. A first groove 460 is arranged at the end of the positioning block 46, and a second groove 461 is arranged at the bottom of the positioning block 46. A positioning groove 50 is arranged at one end of the installation groove 26 away from the rotating rod 41. A plugging rod 51 is vertically installed in the positioning groove 50. A locking block 52 is arranged on the plugging rod 51. The locking block 52 cooperates with the second groove 461. A pressing groove 53 is arranged at the bottom of the positioning groove 50. A second return spring 54 is sleeved on the part of the plugging rod 51 between the locking block 52 and the pressing groove 53. A first return spring 47 is arranged in the arc-shaped groove 260.

[0038] Specifically, a positioning groove 50 is arranged at the end of the installation groove 26, and the plugging rod 51 and the locking block 52 are installed in combination with the positioning groove 50. When the driving assembly drives the connecting column 43 and the arc-shaped slider 42 to slide, the positioning frame 40 opens. In order to keep the positioning always in an open state, an arc-shaped push rod 45 and a positioning block 46 are arranged on the connecting column 43, and a first groove 460 and a second groove 461 are arranged on the positioning block 46. Before the positioning block 46 enters the positioning groove 50, the plugging rod 51 is pressed so that the locking block 52 enters the pressing groove 53. After the positioning block 46 enters the positioning groove 50, the plugging rod 51 is released. The plugging rod 51 and the positioning block 46 rise under the action of the second return spring 54 and cooperate with the second groove 461 to realize the locking of the positioning block 46, so as to keep the expansion state of the positioning frame 40.

[0039] More specifically, a first return spring 47 is arranged in the arc-shaped groove 260. After the locking block 52 disengages from the positioning block 46, the arc-shaped slider 42 retracts under the action of the first return spring 47, thereby driving the swing rod 44 back to the initial position and retracting the positioning frame 40 to the contraction section 21 to retract the expansion positioning mechanism 4.

[0040] Furthermore, as Figure 5As shown, an auxiliary recovery component 6 is further arranged in the installation groove 26. The auxiliary recovery component 6 includes a rotating rod 60 rotatably installed on the contraction section 21. A winding drum 62 is arranged on the part of the rotating rod 60 located in the contraction section 21. A pulling rope 63 is wound around the winding drum 62. An extension section 64 is arranged on the upper side of the connecting column 43. The end of the pulling rope 63 is connected to the extension section 64.

[0041] Specifically, in order to avoid the elasticity of the first return spring 47 being insufficient to push the arc-shaped slider 42 back to the initial end, a rotating winding drum 62 is arranged in the installation groove 26. The pulling rope 63 is arranged in combination with the winding drum 62 and is connected to the extension section 64 on the upper side of the connecting column 43. By rotating the winding drum 62, the connecting column 43 is pulled back to the initial position, so that the expansion positioning mechanism 4 is retracted to the initial position.

[0042] Furthermore, as Figure 3 shown, connecting discs 61 are arranged at both ends of the rotating rod 60 and the inserting rod 51 in the adjacent splicing cylinders 2. The connecting discs 61 are fixedly connected by connecting bolts 610.

[0043] Furthermore, as Figure 4 shown, spherical groove frames 80 are evenly arranged on the inner side of the contraction section 21. Ball bearings 81 are rotatably installed in the spherical groove frames 80. The spherical groove frames 80 are connected to telescopic columns, and the telescopic columns are arranged in the contraction section 21.

[0044] Specifically, the spherical groove frames 80 and the ball bearings 81 are arranged through the telescopic columns to support the oil pipe inserted into the splicing cylinder 2, and the frictional resistance between the oil pipe and the inner wall of the splicing cylinder 2 is reduced.

[0045] The working principle of the embodiment of the present invention is:

[0046] As Figures 1-7As shown, after drilling out the oil hole, insert the splicing cylinder 2 into the oil hole. At the same time, fixedly install the fixing plate 1 around the oil hole, and evenly arrange the downward pressing hydraulic rods 11 through the fixing plate 1. The end of the downward pressing hydraulic rod 11 acts on the upper connecting ring 20 of the splicing cylinder 2, and the splicing cylinder 2 is pushed into the oil pipe. When the oil pipe needs to be extended, align the clamping flange 25 at the bottom of the extended splicing cylinder 2 with the insertion hole 200 of the upper connecting ring 20 of the adjacent splicing cylinder 2, and push the rotating flange 24 to make the lower connecting ring 22 rotate, so that the clamping flange 25 is engaged with the locking groove 201 to complete the splicing and locking between the splicing cylinders 2. A contraction section 21 is arranged in the splicing cylinder 2, and an installation groove 26 is arranged in combination with the contraction section 21. A positioning frame 40 rotatably installed is arranged through the installation groove 26. The left side of the connecting column 43 is acted on by the driving component, driving the arc-shaped slider 42 to slide along the arc-shaped groove 260, so that the swing rod 44 swings, pushing the positioning frame 40 to extend outwards and be clamped on the inner wall of the oil hole to perform clamping positioning on the splicing cylinder 2, avoiding the vertical sliding of the splicing cylinder 2 in the oil hole. After the splicing cylinder 2 carrying the expansion positioning mechanism 4 is pushed into the oil hole under the action of the downward pressing hydraulic rod 11, insert the driving disk 70 through the top fixing plate 1. The driving disk 70 drives the swing rod 73 to move downward. Under the action of the pushing spring 75, when the driving disk 70 reaches the position of the installation groove 26, the swing rod 73 falls into the installation groove 26 and is in a horizontal state. At this time, drive the driving disk 70 to rotate. The swing rod 73 will act on the left side of the connecting column 43, pushing the connecting column 43 to slide along the arc-shaped groove 260, so that the swing rod 44 swings outwards, and then pushing the positioning frame 40 to open outwards to complete the expansion positioning operation. The functions of setting the pushing spring 75 and the installation plate 74 are to prevent the swing rod 73 from swinging towards the inner side of the driving disk 70 and ensure that the swing rod 73 can fall into the installation groove 26 under the action of the pushing spring 75 when it reaches the position of the installation groove 26. In order to ensure that the swing rod 73 can accurately fall on Figure 5At the left position of the connecting column 43 shown, an alignment groove 27 is provided on the contraction section 21, so that the swing rod 73 slides downward along the alignment groove 27 and lands on the left part of the connecting column 43 under the action of the pushing spring 75 when it reaches the installation groove 26. A positioning groove 50 is provided at the end of the installation groove 26. The insertion rod 51 and the locking block 52 are installed in combination with the positioning groove 50. When the driving assembly drives the connecting column 43 and the arc-shaped slider 42 to slide, the positioning frame 40 expands. In order to keep the positioning always in an expanded state, an arc-shaped push rod 45 and a positioning block 46 are provided on the connecting column 43. A first groove 460 and a second groove 461 are provided on the positioning block 46. Before the positioning block 46 enters the positioning groove 50, the insertion rod 51 is pressed so that the locking block 52 enters the pressing groove 53. After the positioning block 46 enters the positioning groove 50, the insertion rod 51 is released. The insertion rod 51 and the positioning block 46 rise under the action of the return spring two 54 and cooperate with the second groove 461 to lock the positioning block 46, so as to keep the positioning frame 40 in an expanded state. A return spring one 47 is provided in the arc-shaped groove 260. After the locking block 52 disengages from the positioning block 46, the arc-shaped slider 42 retracts under the action of the return spring one 47, thereby driving the swing rod 44 back to the initial position and retracting the positioning frame 40 to the contraction section 21 to retract the expansion positioning mechanism 4. In order to prevent the elasticity of the return spring one 47 from being insufficient to push the arc-shaped slider 42 back to the initial end, a rotating winding drum 62 is provided in the installation groove 26. A pull rope 63 is provided in combination with the winding drum 62 and is connected to the extended section 64 on the upper side of the connecting column 43. By rotating the winding drum 62, the connecting column 43 is pulled back to the initial position, thereby retracting the expansion positioning mechanism 4 to the initial position. A ball groove frame 80 and balls 81 are provided through the telescopic column to support the oil pipe inserted into the splicing cylinder 2 and reduce the frictional resistance between the oil pipe and the inner wall of the splicing cylinder 2.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. Any reference signs in the claims shall not be construed as limiting the claimed claims.

[0048] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A spliced expandable wellbore device for oil drilling and production, comprising a fixed plate (1). A central circular groove (10) is provided on the fixed plate (1). The bottom of the fixed plate (1) is evenly provided with downward pressing hydraulic rods (11). The fixed plate (1) is fixedly installed around the oil hole, and it is characterized in that, A splicing cylinder (2) is inserted into the oil hole. A conical head (3) is arranged at the bottom of the splicing cylinder (2). An upper connecting ring (20) and a lower connecting ring (22) are respectively arranged at both ends of the splicing cylinder (2). An insertion hole (200) and a locking groove (201) are arranged on the upper connecting ring (20). The insertion hole (200) is connected to the locking groove (201). The downward pressure hydraulic rod (11) acts on the upper connecting ring (20). Locking holes (202) are evenly arranged on the upper connecting ring (20). Clamping rods (250) and clamping flanges (25) are evenly arranged at the bottom of the lower connecting ring (22). Rotating flanges (24) are evenly arranged on the upper side of the lower connecting ring (22). The lower connecting ring (22) is rotatably connected to the splicing cylinder (2) through a T-shaped connecting block (23). A contraction section (21) is arranged in the middle of the splicing cylinder (2). An expansion positioning mechanism (4) is arranged on the contraction section (21). The expansion positioning mechanism (4) includes mounting grooves (26) evenly arranged on the contraction section (21). An arc-shaped groove (260) is arranged at the bottom of the mounting groove (26). The center of the arc-shaped groove (260) coincides with the axis of the splicing cylinder (2). An arc-shaped slider (42) is slidably mounted in the arc-shaped groove (260). A connecting column (43) is arranged on the arc-shaped slider (42). A swing rod (44) is rotatably mounted on the connecting column (43). A connecting shaft (48) is arranged at the end of the swing rod (44). A rotating rod (41) is arranged in the contraction section (21). A positioning frame (40) is rotatably mounted on the rotating rod (41). The end of the positioning frame (40) is rotatably connected to the swing rod (44) through the connecting shaft (48). A driving component is cooperatively arranged in the splicing cylinder (2). The driving component acts on the side of the connecting column (43), drives the connecting column (43) and the arc-shaped slider (42) to slide along the arc-shaped groove (260), and pushes the positioning frame (40) to open.

2. The spliced expandable wellbore device for oil drilling and production according to claim 1, characterized in that The driving component includes a driving disc (70). Mounting grooves (72) are evenly arranged on the edge of the driving disc (70). A swing rod (73) is rotatably mounted in the mounting groove (72). The rotation range of the swing rod (73) is 90 degrees. A mounting plate (74) is arranged at the part of the driving disc (70) inside the swing rod (73). A pushing spring (75) is fixedly connected to the mounting plate (74). The other end of the pushing spring (75) is mounted in the air. The driving disc (70) cooperates with the contraction section (21). A rotating shaft (71) is connected to the driving disc (70). The rotating shaft (71) is connected to a rotating motor. The rotating motor is fixedly connected to the fixing plate (1).

3. The spliced expandable wellbore device for oil drilling and production according to claim 2, wherein, A vertical alignment groove (27) is arranged on the contraction section (21). The width of the alignment groove (27) is equal to the width of the swing rod (73). A circular chamfer is arranged at the opening of the alignment groove (27).

4. A spliced expandable wellbore wall device for oil drilling and production, characterized in that, A locking component (5) is arranged in the installation groove (26). The locking component (5) includes an arc-shaped push rod (45) fixedly arranged on the connecting column (43). The center of the arc-shaped push rod (45) coincides with the axis of the splicing cylinder (2). The end of the arc-shaped push rod (45) is connected with a positioning block (46). A first groove (460) is arranged at the end of the positioning block (46). A second groove (461) is arranged at the bottom of the positioning block (46). A positioning groove (50) is arranged at one end of the installation groove (26) away from the rotating rod (41). A plugging rod (51) is vertically installed in the positioning groove (50). A locking block (52) is arranged on the plugging rod (51). The locking block (52) cooperates with the second groove (461). A pressing groove (53) is arranged at the bottom of the positioning groove (50). A second return spring (54) is sleeved on the part of the plugging rod (51) between the locking block (52) and the pressing groove (53). A first return spring (47) is arranged in the arc-shaped groove (260).

5. The spliced expandable wellbore device for oil drilling and production according to claim 4, characterized in that, An auxiliary recovery component (6) is also arranged in the installation groove (26). The auxiliary recovery component (6) includes a rotating rod (60) rotatably installed on the contraction section (21). A winding drum (62) is arranged on the part of the rotating rod (60) located in the contraction section (21). A pulling rope (63) is wound on the winding drum (62). An extension section (64) is arranged on the upper side of the connecting column (43). The end of the pulling rope (63) is connected with the extension section (64).

6. The spliced expandable wellbore device for oil drilling and production according to claim 5, wherein Connection discs (61) are arranged at both ends of the rotating rod (60) and the plugging rod (51) in adjacent splicing cylinders (2). The connection discs (61) are fixedly connected by connection bolts (610).

7. A spliced expandable wellbore wall device for oil drilling and production, characterized in that, Ball groove frames (80) are uniformly arranged on the inner side of the contraction section (21). Ball bearings (81) are rotatably installed in the ball groove frames (80). The ball groove frames (80) are connected with telescopic columns. The telescopic columns are arranged in the contraction section (21).

Images