A high-power rotary corer suitable for coring in high-deviation wells and complex well conditions

Abstract

The utility model relates to the field of petroleum exploration equipment, a high -power rotary coring device of core taking of application big inclination well, complex well condition, the outer side of stem body is equipped with guide bearing, and the outer wall of stem body is fixedly connected with the inner wall of guide bearing, is provided with guide subassembly on the circumferential outer wall of guide bearing, and guide subassembly includes guide plate, and the position department of guide plate away from stem body is equipped with rolling recess, and rolling recess is connected with rolling ball in rolling, and rolling ball extends out rolling recess, and the end of guide plate is hinged with auxiliary board, and is provided with auxiliary spring between guide plate and auxiliary board, and one end of auxiliary spring is fixedly connected on guide plate, and the other end is fixedly connected on auxiliary board, and the side away from stem body on auxiliary board is equipped with rotating groove, and rotating wheel is rotatably connected in rotating groove, and the rotation axis of rotating wheel is perpendicular to stem body, and the end away from guide plate of auxiliary board is curved and is arranged in the direction of arc shape to the direction of stem body, reaches the effect that prevents the jamming situation that appears because coring device and well wall collide.

Description

Technical Field

[0001] This utility model relates to the field of petroleum exploration equipment technology, specifically to a high-power rotary coring device suitable for coring in highly deviated wells and complex well conditions. Background Technology

[0002] High-angle wells are a type of directional well in oil drilling engineering with an inclination angle between 60° and 86°. High-angle wells can increase the contact area between the oil well and the underground oil layer, improve extraction efficiency and economic benefits, and are one of the most popular drilling methods in the oil industry.

[0003] Currently, throughout the entire process of constructing a large inclined well, workers need to use a core sampler for assistance. In the early stages of construction, workers can use the core sampler to sample the formation structure and reservoir information, thereby refining the well's production plan. During the oil volume evaluation phase, workers use the core sampler to perform dynamic analysis of the reservoir's specific condition after sampling and testing. In subsequent well production operations, workers can use the core sampler to perform coring at any time, allowing them to obtain dynamic values ​​of the reservoir's condition at any time. The core sampler is an essential information-providing device to ensure precise production in large inclined wells and has broad development and research value.

[0004] A relevant Chinese utility model patent, CN203008834U, discloses a rotating wellbore coring device. This device includes: a rod body comprising a bridle; an electronic section connected to the bridle and communicating with a surface control system; a hydraulic section connected to the electronic section and providing power for coring operations; and a mechanical section connected to the hydraulic section for performing pushing, coring, folding, and storing operations. The embodiments in this application simplify the power system and employ an independent modular design, improving operational efficiency.

[0005] The aforementioned prior art has the following drawbacks: Because of the curved sections in highly deviated wells, the coring device is prone to collision with the well wall during its movement through the curved sections and to the sampling point. This collision can easily cause the coring device to get stuck in the highly deviated well, resulting in a detection accident. Utility Model Content

[0006] The purpose of this invention is to provide a high-power rotary coring tool suitable for coring in highly deviated wells and complex well conditions, so as to prevent jamming caused by the coring tool colliding with the well wall and thus solve the problems mentioned in the background art.

[0007] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution: A high-power rotary coring tool suitable for coring in highly deviated wells and complex well conditions includes a rod body. A guide bearing is fitted onto the outer side of the rod body, and the inner wall of the guide bearing is fixedly connected to the outer wall of the rod body. Multiple guide bearings are arranged along the rod body. Each guide bearing has a guide assembly on its circumferential outer wall. The guide assembly includes a guide plate, a rolling groove formed on the guide plate away from the rod body, and a rolling ball rollingly connected within the rolling groove, extending out of the groove. An auxiliary plate is hinged to the end of the guide plate, and the guide plate and auxiliary plate are arranged parallel to each other. An auxiliary spring is provided between the guide plate and auxiliary plate, with one end fixedly connected to the guide plate and the other end fixedly connected to the auxiliary plate. A rotating groove is formed on the side of the auxiliary plate away from the rod body, and a rotating wheel is rotatably connected within the rotating groove. The rotation axis of the rotating wheel is perpendicular to the rod body. The end of the auxiliary plate away from the guide plate is bent into an arc shape towards the rod body.

[0008] As a preferred embodiment of the present invention, a reset component is provided between the guide plate and the guide bearing, the reset component allowing the guide plate to quickly return to its initial position after displacement.

[0009] In a preferred embodiment of this invention, the reset assembly includes a reset rod, which is fixedly connected to the outer wall of the guide bearing. The reset rod is perpendicular to the rod body, and a reset hole is provided at the end of the reset rod away from the rod body. A reset spring is fixedly connected to the reset hole, and a branch rod is fixedly connected to the reset spring. The end of the branch rod away from the reset spring is fixedly connected to the guide plate.

[0010] As a preferred embodiment of this utility model, a first rod is hinged to the circumferential side of the reset rod, a second rod is connected to the end of the first rod away from the reset rod, and the end of the second rod away from the first rod is hinged to the auxiliary plate.

[0011] In a preferred embodiment of this invention, a chip removal tube is connected to the side of the guide plate via a fixing component. The chip removal tube is parallel to the rod body, and the end of the chip removal tube in the well extends to the guide component near the mechanical joint. A chip collection port is fixedly connected to the end of the chip removal tube near the tube body. The chip collection port is funnel-shaped, with its largest size located away from the chip removal tube. The chip collection port communicates with the chip removal tube. An auxiliary port is provided on the tube body of the chip removal tube, located at a position away from the rod body.

[0012] In a preferred embodiment of this utility model, the fixing component includes a fixing ring, which is sleeved on the chip removal tube. A fixing plate is fixedly connected to the fixing ring at the position facing the rod body. The end of the fixing plate away from the fixing ring extends to the side of the guide plate facing the rod body. The guide plate is provided with a fixing bolt, which passes through the fixing plate and is threaded into the guide plate. The fixing bolt presses the fixing plate tightly onto the guide plate, and the relative position of the fixing ring and the guide plate is fixed. Beneficial effects

[0013] The beneficial effects of this utility model are: The guide bearings and guide components are both located above the mechanical joint of the rod, providing stability while not hindering core sampling. After the rod enters the high-angle well, the side of the guide plate with rolling balls approaches the well wall, where the balls abut against the wall. The rolling balls and rolling recesses form a structure similar to a universal ball bearing, reducing friction between the guide plate and the well wall through ball rolling. A rotating wheel connected to the auxiliary plate abuts against the well wall, further reducing friction and facilitating the auxiliary plate's movement along the well wall. When the rod passes through the curved section of the high-angle well, the multiple guide plates, held in contact with the well wall by the rolling balls, slide smoothly, allowing the multiple guide plates to... The guide plate can transmit the changing angle to the branch rod according to the bending degree of the well wall. The branch rod then transmits the changing angle to the reset rod through the return spring. Since the reset rod is fixedly connected to the guide bearing, and the guide bearing is sleeved on the rod body, the angle of the guide bearing is adjusted under the action of the reset rod, which in turn drives the rod body to adjust according to the change of the well wall. This ensures that the head of the rod body can still be aligned with the axis of the high-angle well after impact, preventing the rod body from getting stuck in the high-angle well. This achieves the effect of preventing jamming caused by the core sampler colliding with the well wall. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 To illustrate the structure of a single guide component; Figure 3 This is a schematic diagram illustrating the structure of the reset assembly.

[0016] The attached diagram lists the components represented by each number as follows: 1. Rod body; 2. Guide bearing; 3. Guide assembly; 31. Guide plate; 32. Rolling groove; 33. Rolling ball; 34. Auxiliary plate; 35. Auxiliary spring; 4. Reset assembly; 41. Reset rod; 42. Reset hole; 43. Reset spring; 44. Branch rod; 5. First rod; 6. Second rod; 7. Chip removal tube; 71. Auxiliary port; 8. Fixing assembly; 81. Fixing ring; 82. Fixing plate; 83. Fixing bolt; 9. Rotating wheel; 91. Rotating groove. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] See Figure 1-3 As shown, a high-power rotary coring tool suitable for coring in highly deviated wells and complex well conditions includes a rod body 1, which is divided into a bridle, an electronic joint, a hydraulic joint, and a mechanical joint from top to bottom. By setting a guiding mechanical structure above the mechanical joint, the rod body 1 can quickly return to a state collinear with the axis of the highly deviated well after impact, preventing the rod body 1 from getting stuck in the well and achieving the effect of preventing jamming caused by the coring tool colliding with the well wall.

[0019] See Figure 1-3 As shown, an annular guide bearing 2 is fitted on the outer side of the rod body 1. The inner wall of the guide bearing 2 is fixedly connected to the outer wall of the rod body 1. Multiple guide bearings 2 are provided and distributed along the rod body 1. Each guide bearing 2 has a guide component 3 on its circumferential outer wall. Multiple guide components 3 are provided and evenly distributed along the circumferential outer wall of the guide bearing 2. The guide bearings 2 are designed so that when the rod body 1 rotates for core extraction, the guide components 3 do not rotate synchronously with the rod body 1. This ensures both the guiding effect of the guide components 3 on the rod body 1 and the normal rotation of the rod body 1 for core extraction.

[0020] See Figure 1-3 As shown, each guide assembly 3 includes a long strip-shaped guide plate 31. A reset assembly 4 is provided between the guide plate 31 and the guide bearing 2. The reset assembly 4 allows the guide plate 31 to quickly return to its initial position after displacement. The guide plate 31 is parallel to the axis of the rod 1. A rolling groove 32 is formed on the guide plate 31 away from the rod 1. A rolling ball 33 is rolled in the rolling groove 32. The rolling ball 33 extends out of the rolling groove 32. By using the rolling ball 33 and the rolling groove 32 in cooperation, multiple universal balls are formed on the side of the guide plate 31 that abuts against the well wall. Then, the rolling of the balls reduces the friction between the guide plate 31 and the well wall, making the sliding of the guide plate 31 along the well wall smoother and preventing jamming.

[0021] See Figure 1-3As shown, each end of the guide plate 31 is hinged with a long strip-shaped auxiliary plate 34. The auxiliary plate 34 is arranged collinearly with the guide plate 31 and parallel to it. An auxiliary spring 35 is provided between the guide plate 31 and the auxiliary plate 34. One end of the auxiliary spring 35 is fixedly connected to the guide plate 31, and the other end is fixedly connected to the auxiliary plate 34. A rotating groove 91 is provided on the side of the auxiliary plate 34 away from the rod 1. Multiple rotating grooves 91 are provided and evenly distributed. A rotating wheel 9 is rotatably connected in each rotating groove 91. The rotation axis of the rotating wheel 9 is perpendicular to the rod. The auxiliary plate 34, located away from the guide plate 31, is bent in an arc shape towards the rod body 1. When an obstacle appears on the well wall, the bent end of the auxiliary plate 34 can smoothly contact the obstacle. Then, the auxiliary plate 34 presses against the auxiliary spring 35, causing the auxiliary plate 34 to slide along the obstacle. After the rotating wheel 9 passes over the obstacle, the auxiliary spring 35 restores the auxiliary plate 34 to its original state, preventing the rod body 1 from getting stuck due to obstacles on the well wall. This reduces the impact of the "cuttings bed" on the well wall on the rod body 1 and prevents the rod body 1 from getting stuck in a highly deviated well.

[0022] See Figure 1-3 As shown, the reset assembly 4 includes a reset rod 41, which is fixedly connected to the outer wall of the guide bearing 2. The reset rod 41 is perpendicular to the rod body 1. A reset hole 42 is provided at the end of the reset rod 41 away from the rod body 1. A reset spring 43 is fixedly connected to the reset hole 42. A branch rod 44 is fixedly connected to the reset spring 43. The end of the branch rod 44 away from the reset spring 43 is fixedly connected to the guide plate 31. A first rod 5 is hinged to the circumferential side of the reset rod 41. A second rod 6 is connected to the end of the first rod 5 away from the reset rod 41. The end of the second rod 6 away from the first rod 5 is hinged to the auxiliary plate 34. The first rod 5 and the second rod 6 ensure that the auxiliary plate 34 returns to a state parallel to the guide plate 31, so that the auxiliary plate 34 returns to its correct position each time.

[0023] See Figure 1-3As shown, a high-pressure resin cleaning pipe 7 is connected to the side of the guide plate 31. The cleaning pipe 7 is fixed to each guide plate 31 by a fixing component 8. The end of the cleaning pipe 7 away from the rod 1 is located outside the well. The end of the cleaning pipe 7 outside the well is provided with negative pressure by a water pump to extract the debris. The number of cleaning pipes 7 corresponds to the number of guide components 3 set on a single guide bearing 2. The cleaning pipe 7 is parallel to the rod 1. The end of the cleaning pipe 7 in the well extends to the guide component 3 near the mechanical joint. An elliptical auxiliary port 71 is opened on the pipe body of the cleaning pipe 7. The auxiliary port 71 is located on the pipe body of the cleaning pipe 7 away from the rod 1. The auxiliary port 71 is flush with the side of the guide plate 31 where the rolling ball 33 is set. When encountering a cuttings bed, the auxiliary port 71 can suck up the cuttings in the well wall, reduce the amount of cuttings, and provide a smoother environment for the movement of the rod 1.

[0024] See Figure 1-3 As shown, the fixing assembly 8 includes an annular fixing ring 81, which is sleeved on the chip removal tube 7. A fixing plate 82 is fixedly connected to the fixing ring 81 at the position facing the rod body 1. The end of the fixing plate 82 away from the fixing ring 81 extends to the side of the guide plate 31 facing the rod body 1. The guide plate 31 is provided with a fixing bolt 83, which passes through the fixing plate 82 and is threaded into the guide plate 31. The fixing bolt 83 presses the fixing plate 82 onto the guide plate 31, and the relative position of the fixing ring 81 and the guide plate 31 is fixed.

[0025] In summary, the above steps effectively prevent jamming caused by the core sampler colliding with the well wall.

[0026] Of course, the above description is not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, alterations, additions or substitutions made by those skilled in the art within the scope of the present utility model should be protected by the present utility model.

Claims

1. A high-power rotary corer suitable for coring in high-angle wells and complex well conditions, comprising a rod body (1), characterized in that: A guide bearing (2) is sleeved on the outer side of the rod (1). The inner wall of the guide bearing (2) is fixedly connected to the outer wall of the rod (1). Multiple guide bearings (2) are provided and distributed along the rod (1). A guide assembly (3) is provided on the circumferential outer wall of each guide bearing (2). Multiple guide assemblies (3) are provided and evenly distributed along the circumferential outer wall of the guide bearing (2). The guide assembly (3) includes a guide plate (31). A rolling groove (32) is provided on the guide plate (31) at a position away from the rod (1). A rolling ball (33) is rolled in the rolling groove (32). The rolling ball (33) extends out of the rolling groove. The guide plate (31) is hinged to the end of the groove (32) and the auxiliary plate (34). The guide plate (31) and the auxiliary plate (34) are arranged in parallel. An auxiliary spring (35) is arranged between the guide plate (31) and the auxiliary plate (34). One end of the auxiliary spring (35) is fixedly connected to the guide plate (31) and the other end is fixedly connected to the auxiliary plate (34). A rotating groove (91) is opened on the side of the auxiliary plate (34) away from the rod (1). A rotating wheel (9) is rotatably connected in the rotating groove (91). The rotation axis of the rotating wheel (9) is perpendicular to the rod (1). The end of the auxiliary plate (34) away from the guide plate (31) is bent in the direction of the rod (1) and arranged in an arc shape.

2. The high-power rotary corer suitable for coring in high-deviation wells and complex well conditions according to claim 1, characterized in that: A reset assembly (4) is provided between the guide plate (31) and the guide bearing (2), which allows the guide plate (31) to quickly return to its initial position after displacement.

3. The high-power rotary coring tool for coring in highly deviated wells and complex well conditions according to claim 2, characterized in that: The reset assembly (4) includes a reset rod (41), which is fixedly connected to the outer wall of the guide bearing (2). The reset rod (41) is perpendicular to the rod body (1). A reset hole (42) is provided at the end of the reset rod (41) away from the rod body (1). A reset spring (43) is fixedly connected in the reset hole (42). A branch rod (44) is fixedly connected to the reset spring (43). The end of the branch rod (44) away from the reset spring (43) is fixedly connected to the guide plate (31).

4. The high-power rotary corer suitable for coring in high-deviation wells and complex well conditions according to claim 3, characterized in that: A first rod (5) is hinged to the circumferential side of the reset rod (41), and a second rod (6) is connected to the end of the first rod (5) away from the reset rod (41). The end of the second rod (6) away from the first rod (5) is hinged to the auxiliary plate (34).

5. The high power rotary corer for coring in high angle deviated wells and complex well conditions according to claim 1, characterized in that: A chip removal tube (7) is connected to the side of the guide plate (31) via a fixing component (8). The chip removal tube (7) is parallel to the rod body (1). The end of the chip removal tube (7) in the well extends to the guide component (3) near the mechanical joint. A chip collection port is fixedly connected to the end of the chip removal tube (7) near the tube body. The chip collection port is funnel-shaped and has the largest size at the position away from the chip removal tube (7). The chip collection port is connected to the chip removal tube (7). An auxiliary port (71) is opened on the tube body of the chip removal tube (7). The auxiliary port (71) is located on the tube body of the chip removal tube (7) away from the rod body (1). The auxiliary port (71) is flush with the side of the guide plate (31) where the rolling ball (33) is set.

6. A high power rotary corer suitable for coring in high angle deviated wells and complex well conditions according to claim 5, characterized in that: The fixing component (8) includes a fixing ring (81), which is sleeved on the chip removal tube (7). A fixing plate (82) is fixedly connected to the fixing ring (81) at the position facing the rod (1). The end of the fixing plate (82) away from the fixing ring (81) extends to the side of the guide plate (31) facing the rod (1). The guide plate (31) is provided with a fixing bolt (83). The fixing bolt (83) passes through the fixing plate (82) and is threaded into the guide plate (31). The fixing bolt (83) presses the fixing plate (82) onto the guide plate (31), and the relative position of the fixing ring (81) and the guide plate (31) is fixed.

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