A drill pipe bit orientation mechanism

Abstract

The present application relates to the technical field of drill pipe orientation, and specifically discloses a drill pipe and drill bit orientation mechanism, which comprises four movable large linear bearings sleeved on the surface of the drill pipe for positioning, the inner diameter of the large linear bearings is larger than the outer diameter of the drill pipe, and the inner wall is in linear contact with the surface of the drill pipe; the four movable large linear bearings are arranged, when the drill pipe passes through the large linear bearings, the four large linear bearings are moved to form positioning and clamping in four directions of the drill pipe, which can adapt to drill pipes of different diameters, and can effectively orient the drill pipe during rotation and movement of the drill pipe, reduce the friction between the drill pipe and the large linear bearings, and the righting piece of the elastic righting device can be squeezed by the well wall, the righting range is expanded, the stability of orientation is improved, and the elastic righting device is different from the traditional elastic righting device, the contact points of the righting piece of the elastic righting device and the well wall are two, which can effectively improve the shock resistance and further ensure the accuracy of the drill hole.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drill pipe orientation, and specifically discloses a drill pipe and drill bit orientation mechanism. BACKGROUND

[0002] Drill pipes are core tools in drilling operations and are mainly used for underground drilling and are widely used in energy exploitation, geological exploration and engineering construction, etc. In order to ensure that drilling is accurately carried out along a preset path, the drill pipe needs to be oriented, which includes wellhead orientation and downhole orientation. The drill pipe is oriented to position the drill bit on the drill pipe. The wellhead orientation is a key equipment for ensuring that the drill pipe is vertically inserted into the well in drilling operations. The technical characteristics and limitations of the drill pipe directly affect the drilling efficiency and safety of the drill bit on the drill pipe.

[0003] Most current wellhead orientation mechanisms are single drill pipe positioning mechanisms, which only need to ensure that the drill pipe is centered and passed through. The drill pipe is usually not directly contacted and positioned with the well wall. The vibration generated by the drill pipe during drilling directly acts on the orientation mechanism. The orientation mechanism is not limited by the well wall, and the orientation mechanism is greatly affected by the vibration. The drilling accuracy of the drill pipe is relatively low. In particular, for shorter guide mechanisms, the guide contact area is small, and the restraint force on the drill pipe is weaker. Longer guide mechanisms usually have stronger restraint force on the drill pipe, improve drilling stability, and ensure drilling accuracy. However, due to the increase in friction area, higher friction resistance and heat accumulation are caused, which may accelerate the wear of the drill pipe or the guide sleeve. Most orientation mechanisms are only suitable for a single drill pipe outer diameter. When the drill pipe size is changed, the operation needs to be stopped for replacement, which reduces the operation efficiency. The orientation mechanism is usually made of carbon steel or alloy steel, which directly rubs with the drill pipe, causing scratches on the surface of the drill pipe and reducing the fatigue life. The inner wall of the orientation mechanism is quickly worn and needs to be frequently replaced.

[0004] Therefore, there is an urgent need for an orientation mechanism that can improve the drilling accuracy of the drill pipe, adapt to different diameter drill pipes, and reduce the wear of the drill pipe and the orientation mechanism itself. SUMMARY

[0005] To solve the above problems, the present application provides a drill pipe and drill bit orientation mechanism to solve the problems mentioned in the background.

[0006] In order to achieve the above object, the present application adopts the following technical scheme: A drill pipe drill bit orientation mechanism, comprising four movable sleeve sets on the surface of the drill pipe for positioning large linear bearings, the inner diameter of the large linear bearing is larger than the outer diameter of the drill pipe, and one side inner wall is in line contact with the surface of the drill pipe, a plurality of large linear bearings are equidistantly arranged in the installation sleeve, the surface of the large linear bearing is equipped with a mounting sleeve coaxial with the drill pipe, the inside of the mounting sleeve is equipped with an adjusting assembly for adjusting the position of the large linear bearing to adapt to clamping drill pipes of different diameters; the surface of the mounting sleeve is coaxially equipped with an elastic centralizer for fitting inside the well wall, the elastic centralizer comprises two central pipes at the upper end and the lower end and an elastic sheet connecting the two central pipes, the number of elastic sheets is usually 6-8, equidistantly arranged, one end of the elastic centralizer is fixedly installed on the surface of the mounting sleeve, the other end of the elastic centralizer is movably sleeved on the surface of the mounting sleeve, and the surface of the elastic centralizer is equipped with a locking assembly for positioning the movable end; the centralizing sheets of the elastic centralizer are provided in two groups, each group of centralizing sheets is alternately arranged, and the contact points with the well wall are located at different heights.

[0007] Preferably, the adjusting assembly comprises a circular truncated cone-shaped positioning sleeve fixedly sleeved on the surface of the large linear bearing, the surface of the positioning sleeve is equipped with a pressing sleeve for moving the positioning sleeve, the inner wall of the pressing sleeve is circular truncated cone-shaped, and the inner diameter is larger than the outer diameter of the positioning sleeve, the positioning sleeve is in line contact with the pressing sleeve, and the inside of the mounting sleeve is equipped with a positioning assembly for positioning the pressing sleeve.

[0008] Preferably, the positioning assembly comprises a connecting plate for connecting a plurality of pressing sleeves, the upper end of the top pressing sleeve is equipped with a connecting pipe extending above the mounting sleeve, a plurality of positioning plates are fixedly installed on the surface of the connecting pipe, the surface of one of the positioning plates is threadedly installed with an adjusting screw, and the surfaces of the other positioning plates are equipped with guide rods I for guiding.

[0009] Preferably, the surfaces of the two central pipes of the elastic centralizer are each equipped with three groups of axially corresponding connecting blocks, a guide rod II for guiding is arranged between each group of corresponding connecting blocks, the lower end of the guide rod II is threadedly connected with the lower connecting block, and the upper end of the guide rod II movably penetrates the upper connecting block.

[0010] Preferably, the locking assembly comprises an annular protective cover for supporting installation on the drilling platform, the surface of the guide rod II is slidably equipped with a locking block for positioning the upper connecting block, the surface of the locking block is equipped with a locking screw, the locking block can move axially along the locking screw but cannot rotate, a plurality of locking screws are simultaneously driven to rotate through a synchronous assembly, and the guide rod II is equipped on the surface of the protective cover.

[0011] Preferably, the synchronous assembly comprises gears assembled on the surface of the locking screw, the surfaces of the plurality of gears synchronously engage a tooth ring, the tooth ring and the gears are both assembled inside the protective cover, and one of the gear surfaces is assembled with a motor for driving rotation thereof.

[0012] Preferably, the lower end of the locking block is assembled with a compensation rod for abutting against the surface of the connecting block, and the length of the compensation rod is greater than the length of the locking screw.

[0013] Preferably, the inside of the mounting sleeve is symmetrically assembled with two groups of support plates for guiding, the lower end of the large linear bearing is assembled with a ball assembly, and the ball assembly abuts against the surface of the support plate.

[0014] Preferably, the upper end of the large linear bearing is assembled with an annular elastic washer, and the upper end diameter of the elastic washer is greater than the lower end diameter.

[0015] 1. The technical scheme has the following advantages or beneficial effects: the drilling rod bit directional mechanism provided by the application can adapt to drilling rods of different diameters, and can effectively orient the drilling rod and reduce the friction between the directional mechanism and the drilling rod during the rotation and downward movement of the drilling rod.

[0016] 2. The technical scheme has the following advantages or beneficial effects: the drilling rod bit directional mechanism provided by the application can indirectly enhance the constraint force on the drilling rod, thereby improving the stability of the drilling and ensuring the accuracy of the drilling.

[0017] 3. The technical scheme has the following advantages or beneficial effects: the drilling rod bit directional mechanism provided by the application can achieve double orientation of the drilling rod and the well wall, thereby further improving the accuracy of the drilling rod drilling. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application and its features, shapes and advantages will become more apparent from the following detailed description of non-limiting embodiments, with reference to the accompanying drawings. The same reference numbers in all the drawings indicate the same parts, and the drawings are not necessarily drawn to scale, but the emphasis is on illustrating the main idea of the present application.

[0019] Figure 1 is a perspective structural schematic view of the drilling rod bit directional mechanism provided by the application.

[0020] Figure 2 is a perspective structural schematic view of the elastic centralizer in the mounted state.

[0021] Figure 3 is a perspective view of the meshing state of the gear ring and the gear ring.

[0022] Figure 4 is a perspective view of the installation state of the locking screw and the locking block.

[0023] Figure 5 is a planar bottom view of the positioning state of the large linear bearing.

[0024] Figure 6 is a front sectional plan view of Figure 5 .

[0025] Figure 7 is a perspective view of the installation state of the extrusion sleeve and the positioning sleeve.

[0026] Figure 8 is a perspective view of the connection state of the plurality of extrusion sleeves.

[0027] In the figure: 1, large linear bearing; 2, installation sleeve; 3, adjusting assembly; 31, positioning sleeve; 32, extrusion sleeve; 4, elastic centralizer; 5, locking assembly; 51, protective cover; 52, locking block; 53, locking screw; 6, positioning assembly; 61, connecting plate; 62, connecting pipe; 63, positioning plate; 64, adjusting screw; 65, guide rod one; 7, connecting block; 8, guide rod two; 9, synchronization assembly; 91, gear; 92, gear ring; 93, motor; 10, compensation rod; 11, support plate; 12, ball assembly; 13, elastic washer. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0029] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0030] Figure 1 is an installation state diagram of a directional mechanism for a drill pipe and a drill bit on a drilling platform, a construction frame is built on the drilling platform, the drill bit and the drill pipe pass through the construction frame to drill, the inner side of the construction frame is the well wall of the drilling, the directional mechanism is erected above the construction frame and extends to the inside of the well wall, the directional mechanism is directional to the drill pipe, the well wall is directional to the directional mechanism, and double positioning is implemented to effectively reduce the influence of the drill pipe drilling vibration and ensure the drilling accuracy.

[0031] As Figures 5-8 shown in the embodiment, the surface of the drill rod is sleeved with the mounting sleeve 2, the inner wall of the mounting sleeve 2 is fixedly installed with four groups of support plates 11 through bolts, the number of each group of support plates 11 is two, and the four groups of support plates 11 are symmetrically distributed along the axis of the mounting sleeve 2, each group of support plates 11 is slidably installed with a large linear bearing 1, that is, the four large linear bearings 1 are distributed along the axis direction of the mounting sleeve 2, and the drill rod penetrates the four large linear bearings 1 in sequence. It should be noted that the inner diameter of each large linear bearing 1 is greater than the outer diameter of the drill rod, one side of the inner wall of each large linear bearing 1 is in line contact with the drill rod, and the four large linear bearings 1 are equally distributed in the mounting sleeve 2, so that Figure 6 for example, the upper two large linear bearings 1 are in line contact with the left side and the right side of the inner wall of the drill rod respectively, and the lower two large linear bearings 1 are in line contact with the front side and the rear side of the inner wall of the drill rod respectively, forming a wrapped guide as Figure 5 shown. The inside of the mounting sleeve 2 is provided with an adjusting assembly 3, which adjusts the distance between the contact line and the axis of the drill rod, so as to position the drill rod of different diameters. Positioning the drill rod by using the large linear bearing 1 can effectively reduce the friction on the surface of the drill rod, and the damage to the large linear bearing 1 is also small. When the large linear bearing 1 is damaged, it can be replaced alone. In order to prevent the drill rod from colliding with the large linear bearing 1 during downward movement, the top of the large linear bearing 1 is fixedly installed with an annular elastic washer 13 through a screw. The upper end diameter of the elastic washer 13 is greater than the lower end diameter, so that the drill rod will not directly collide with the large linear bearing 1 when it moves downward, reducing the influence on the precision of the large linear bearing 1.

[0032] The adjusting assembly 3 comprises four positioning sleeves 31 with a circular truncated cone shape, one positioning sleeve 31 is installed corresponding to each large linear bearing 1, the middle part of the positioning sleeve 31 is hollow from top to bottom, and the positioning sleeve 31 is fixedly sleeved and installed on the surface of the large linear bearing 1 through a positioning pin. The surface of each positioning sleeve 31 is slidably installed with an extrusion sleeve 32. It should be noted that the height of the extrusion sleeve 32 is only half of the height of the positioning sleeve 31, the inner wall shape of the extrusion sleeve 32 is matched with the inner wall shape of the positioning sleeve 31, the four extrusion sleeves 32 are coaxially installed and coaxially installed with the mounting sleeve 2, the inner diameter of the extrusion sleeve 32 is equal to the outer diameter of the positioning sleeve 31, and the extrusion sleeve 32 and the positioning sleeve 31 are in linear contact. Since the positions of the axes of the four large linear bearings 1 are different, the positions of the linear contact are also different at this time. When the position of the large linear bearing 1 is adjusted, the extrusion sleeve 32 is lowered to extrude the positioning sleeve 31 by using the linear contact position, so that the large linear bearing 1 is driven to move along the support plate 11. Since the large linear bearing 1 itself is a high-precision instrument, in order to reduce the wear generated during movement, the large linear bearing 1 is rotatably installed at the lower end of the large linear bearing 1. Each of the plurality of ball assemblies 12 is provided with a plurality of balls, and the balls are abutted against the surface of the support plate 11. The mounting sleeve 2 is internally provided with a positioning assembly 6 for fixing the position of the extrusion sleeve 32 after movement.

[0033] It should be noted that when positioning the drill pipe with different diameters each time, the large linear bearing 1 in the mounting sleeve 2 needs to be repositioned first, that is, when the extrusion sleeve 32 is at the highest position of the positioning sleeve 31, the positioning sleeve 31 and the extrusion sleeve 32 are in linear contact (see Figure 6 and Figure 7 ), and then the extrusion sleeve 32 is moved to be reduced in diameter.

[0034] As Figure 1 , Figure 4 and Figures 7-8As shown, the positioning assembly 6 comprises three connecting plates 61 located between adjacent extrusion sleeves 32, which are fixedly connected with the extrusion sleeves 32 by welding. It should be noted that the connecting plates 61 cannot hinder the movement of the large linear bearing 1. The topmost extrusion sleeve 32 is fixedly connected with a connecting pipe 62. In this embodiment, the top of the connecting pipe 62 is fixedly connected with three sets of positioning plates 63 which are circumferentially equidistantly welded on the surface of the connecting pipe 62. One of the positioning plates 63 is threadedly installed with an adjusting screw 64, and the other two positioning plates 63 are provided with circular holes in which small linear bearings are installed in interference fit on the inner walls. The small linear bearings are slidably installed with guide rods one 65 on the inner walls. It should be noted that although the single adjusting screw 64 adjusts the connecting pipe 62 to be eccentrically driven, the friction between the small linear bearings and the guide rods one 65 is very small, so that the problem of friction jamming of eccentric driving can be avoided. At this time, the positioning plates 63 can slide along the surface of the guide rods one 65, and the guide rods one 65 are relatively fixed with the construction frame, and the adjusting screw 64 rotates relatively with the construction frame.

[0035] At this time, the positioning of the drill pipe with different diameters can be realized, and the wear on the surface of the drill pipe and the directional mechanism itself can be effectively reduced.

[0036] For the orientation with the well wall, as shown in the figure, Figures 1-4 As shown, the surface of the mounting sleeve 2 is coaxially assembled with an elastic centralizer 4, which comprises a top center pipe and a bottom center pipe, and an elastic centralizing piece connecting the two center pipes. The elastic centralizer 4 is sleeved and installed on the surface of the mounting sleeve 2, with the difference that the position of the bottom center pipe is unchanged, and the top center pipe can slide axially along the surface of the mounting sleeve 2. When the elastic centralizer 4 enters the inside of the well wall, the well wall will extrude the elastic centralizing piece, so that the top of the elastic centralizer 4 slides, the length of the entire elastic centralizer 4 increases, the centralizing range of the mounting sleeve 2 is increased, and the centralizing range of the drill pipe is indirectly increased. The surface of the elastic centralizer 4 is installed with a locking assembly 5 to position the position of the movable end. When the elastic centralizer 4 adapts to the inner diameter of the well wall, the locking assembly 5 is directly used for locking to improve the stability of the orientation and ensure the accuracy of the drilling.

[0037] The locking assembly 5 comprises an annular protective cover 51 coaxially arranged with the well wall, the protective cover 51 is arranged on the construction frame, the installation sleeve 2 is fixedly arranged in the interior of the protective cover 51, the guide rod one 65 is fixedly arranged on the surface of the protective cover 51 through a pin shaft, the adjusting screw rod 64 is rotatably arranged on the surface of the protective cover 51, three guide rods two 8 are fixedly arranged on the surface of the protective cover 51 through bolts, the surfaces of the two central pipes of the elastic centralizer 4 are fixedly welded with three groups of axially corresponding connecting blocks 7, the lower end of the guide rod two 8 is threadedly arranged with the lower connecting block 7, the upper connecting block 7 is movably sleeved on the surface of the guide rod two 8 and axially slides along the surface of the guide rod two 8, the guide rod two 8 is located between the adjacent two elastic centralizing pieces of the elastic centralizer 4, the distance between the elastic centralizing piece and the guide rod two 8 is greater than the deformation distance of the elastic centralizing piece, so that the elastic centralizing piece does not contact the guide rod two 8 during the deformation process, the surface of the guide rod two 8 is slidably arranged with a locking block 52, the lower surface of the locking block 52 is fixedly welded with a compensation rod 10, the compensation rod 10 abuts against the surface of the upper connecting block 7 to be locked, the surface of the locking block 52 is threadedly arranged with a locking screw rod 53, the position of the locking block 52 is adjusted by rotating the locking screw rod 53, it should be noted that the length of the compensation rod 10 is greater than the length of the locking screw rod 53, during the adjustment process, the highest position of the lower end of the compensation rod 10 is still below the locking screw rod 53, when the directional mechanism is located in the interior of the well wall, the elastic centralizer 4 is completely located in the well wall, but the locking screw rod 53 is still located above the well mouth, which does not affect the orientation of the elastic centralizer 4 and the well wall, and the three locking blocks 52 need to be simultaneously locked through a synchronous assembly 9, the guide rod one 65 is fixedly arranged on the surface of the protective cover 51, and the adjusting screw rod 64 is rotatably arranged on the surface of the protective cover 51.

[0038] The synchronous assembly 9 comprises a gear 91 and a tooth ring 92, the gear 91 is fixedly connected with the locking screw rod 53 through a key, the three gears 91 are all engaged with the tooth ring 92, when the tooth ring 92 rotates, the three gears 91 can be driven to rotate at the same time, so as to realize the synchronous adjustment and locking of the three locking blocks 52, the exterior of the protective cover 51 is fixedly arranged with a motor 93 through a motor base, the output shaft of the motor 93 is fixedly arranged in the interior of one of the gears 91, and the gear 91 is a main driving wheel.

[0039] The elastic centralizing pieces of the elastic centralizer 4 are provided with two groups, each group has three elastic centralizing pieces, the outermost point height positions of the elastic centralizing pieces of different groups are different, that is, the point positions abutting against the well wall surface when contacting the well wall are different, so that the elastic centralizer 4 and the well wall form two contact supporting points, which can further improve the directional stability between the elastic centralizer 4 and the well wall and ensure the drilling precision.

[0040] The four large linear bearings 1 are used for orienting the drill rod, which can effectively reduce the wear on the surface of the drill rod, and the position of the large linear bearing is controlled to guide the drill rod with different diameters, and the elastic centralizer 4 installed outside the casing 2 is used, the movable characteristics of the end of the elastic centralizer 4 are used to increase the range of centralization, and the constraint force on the drill rod is indirectly increased, and the drill rod is simultaneously oriented, the stability of the drill rod is effectively improved through double orientation, and then the accuracy of the drilling of the drill rod is ensured.

[0041] The present application provides a drill rod bit orientation mechanism, a construction frame is built on a drilling platform, the protective cover 51 is hoisted into a well, the elastic sheet of the elastic centralizer 4 is in contact with the well wall and is extruded, the upper end of the elastic centralizer 4 is moved and extended, a long-range positioning is formed, then the motor 93 is started to drive the corresponding gear 91 to rotate, the other two gears 91 are driven to rotate through the transmission of the gear ring 92, then the locking screw 53 is rotated to adjust the position of the locking block 52, until the upper end of the elastic centralizer 4, then the drill rod is inserted through the position between the four large linear bearings 1, the position of the extrusion casing 32 is changed by rotating the adjusting screw 64, the positioning casing 31 is extruded, and the four positioning casings 31 are tightly attached to the four directions of the drill rod, the drill rod is oriented, and the friction between the drill rod and the drill rod can be effectively reduced.

[0042] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0043] In addition, the terms "first", "second", "one", "two" are only for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "one", "two" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0044] In this application, unless otherwise clearly indicated and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0045] The embodiments of the specific implementation are the preferred embodiments of the application, not limited by the protection scope of the application, therefore, any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A drill pipe and drill bit orientation mechanism, characterized in that: It includes at least three large linear bearings for positioning that are movably sleeved on the surface of the drill rod. The inner diameter of the large linear bearings is larger than the outer diameter of the drill rod, and one inner wall of one side is in line contact with the surface of the drill rod. The large linear bearings are equidistantly arranged in a mounting sleeve. The surface of the large linear bearings is fitted with a mounting sleeve that is coaxial with the drill rod. The interior of the mounting sleeve is fitted with an adjustment component for adjusting the position of the large linear bearings to adapt to clamping drill rods of different diameters. The surface of the mounting casing is coaxially fitted with an elastic centralizer for fitting inside the well wall. One end of the elastic centralizer is fixedly mounted on the surface of the mounting casing, and the other end of the elastic centralizer is movably sleeved on the surface of the mounting casing. The surface of the elastic centralizer is fitted with a locking component for positioning the movable end. The elastic centralizer has two sets of centralizing plates, with each set of centralizing plates arranged alternately and their contact points with the well wall located at different heights. The adjustment assembly includes a frustum-shaped positioning sleeve fixedly sleeved on the surface of a large linear bearing, a pressing sleeve for moving the positioning sleeve is mounted on the surface of the positioning sleeve, and a positioning assembly for positioning the pressing sleeve is mounted inside the mounting sleeve. The positioning assembly includes a connecting plate for mounting and connecting multiple extrusion sleeves, and the upper end of the top extrusion sleeve is equipped with a connecting pipe extending above the mounting sleeve. The axial positions of the multiple large linear bearings are different.

2. The drill pipe and drill bit orientation mechanism according to claim 1, characterized in that: The inner wall of the extrusion sleeve is frustum-shaped, and its inner diameter is larger than the outer diameter of the positioning sleeve. The positioning sleeve is in line contact with the extrusion sleeve.

3. The drill pipe and drill bit orientation mechanism according to claim 2, characterized in that: Multiple positioning plates are fixedly installed on the surface of the connecting pipe. One of the positioning plates has an adjusting screw threaded onto its surface, and the other positioning plates are equipped with guide rods for guidance.

4. The drill pipe and drill bit orientation mechanism according to claim 1, characterized in that: The surfaces of the two central tubes of the elastic centralizer are each equipped with multiple sets of axially corresponding connecting blocks. Each set of corresponding connecting blocks is equipped with a guide rod II for guidance. The lower end of the guide rod II is threadedly connected to the lower connecting block, and the upper end of the guide rod II movably passes through the upper connecting block.

5. A drill pipe and drill bit orientation mechanism according to claim 4, characterized in that: The locking assembly includes a protective cover mounted on the drilling platform for support installation. A locking block for positioning the upper connecting block is slidably mounted on the surface of the guide rod two. A locking screw is mounted on the surface of the locking block. Multiple locking screws are driven to rotate simultaneously by a synchronization assembly. The guide rod two is mounted on the surface of the protective cover.

6. A drill pipe and drill bit orientation mechanism according to claim 5, characterized in that: The synchronization assembly includes gears mounted on the surface of a locking screw, and the surfaces of a plurality of gears synchronously mesh with a gear ring. Both the gear ring and the gears are mounted inside a protective cover, and one of the gears has a motor mounted on its surface for driving its rotation.

7. A drill pipe and drill bit orientation mechanism according to claim 5, characterized in that: The lower end of the locking block is fitted with a compensating rod for abutting against the surface of the connecting block, and the length of the compensating rod is greater than the length of the locking screw.

8. A drill pipe and drill bit orientation mechanism according to claim 2, characterized in that: The mounting sleeve is symmetrically fitted with two sets of guide support plates inside. The lower end of the large linear bearing is fitted with a ball bearing assembly, which rests against the surface of the support plate.

9. A drill pipe and drill bit orientation mechanism according to claim 1, characterized in that: The upper end of the large linear bearing is fitted with an annular elastic washer, and the upper diameter of the elastic washer is larger than the lower diameter.

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