Downhole while-drilling control mechanism

Abstract

The utility model discloses an underground while-drilling control mechanism which comprises a drill rod and a drilling tool, a fixing piece is installed at the tail end of the drill rod, the drill rod is fixedly provided with a driving rod through the fixing piece, the drilling tool is connected outside the drill rod in a sleeved mode, a drill bit is fixedly assembled at the front end of the drill rod, and a plurality of groups of side wings are arranged at the front end of the outer wall of the drill rod. A plurality of groups of blocking blocks are distributed on the inner wall of the drilling tool, clamping grooves are machined in the contact faces of the blocking blocks and the side wings, and the clamping grooves and the blocking blocks abut against each other when the drilling rod and the drilling tool are in a locked state. According to the underground while-drilling control mechanism, the driving rod is arranged, the connecting state of the drill rod and the drilling tool is smoothly controlled and converted, the connecting state of the drill rod and the drilling tool can be rapidly converted through simple external driving force operation, drilling operation does not need to be stopped, the continuity and efficiency of drilling operation are remarkably improved, different drilling requirements are met, and the practicability is high. The problem that the connection state between the drill rod and the drilling tool cannot be quickly switched and adjusted is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling, in particular to an underground drilling-while-drilling control mechanism. Background Art

[0002] Downhole drill bits are one of the core equipment for completing drilling tasks. Their main functions are to drill into rocks, transport drilling fluid, transmit rotational force, and withstand axial loads during drilling. The connection status between the drill bit and the drill pipe directly affects drilling efficiency and safety. In the locked state, the drill bit is tightly connected to the drill pipe, transmitting rotational force and bearing pressure as a whole, which is suitable for drilling into hard rocks or performing straight-line drilling. In the live-jointed state, the drill bit can rotate freely relative to the drill pipe, which is suitable for scenarios where the drill bit direction needs to be adjusted or complex geological conditions need to be handled. The live-jointed state increases the flexibility of drilling operations, allowing the drill bit to adapt to more diverse drilling needs.

[0003] At present, the connection status switching between drill pipes and drilling tools on the market is mostly not flexible enough, and most of them need to be adjusted manually or by complex mechanical devices. This switching solution is not only cumbersome and inefficient, but also has certain safety risks in the complex working environment underground, which increases the difficulty and uncertainty of the operation. Especially in emergency situations where the connection status needs to be quickly switched to cope with special geological conditions, the existing solutions are difficult to meet actual needs.

[0004] Therefore, a downhole control mechanism while drilling is needed to solve the above technical defects. Utility Model Content

[0005] The utility model aims to provide a downhole control mechanism while drilling, so as to solve the problem that the connection state between the drill rod and the drilling tool cannot be quickly switched proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an underground control mechanism while drilling, comprising a drill pipe and a drill tool, a fixing piece is installed at the rear end of the drill pipe, a driving rod is fixed to the drill pipe through the fixing piece, a drill tool is sleeved on the outside of the drill pipe, a drill bit is fixedly assembled on the front end of the drill pipe, a plurality of groups of side wings are arranged at the front end of the outer wall of the drill pipe, a plurality of groups of blocking blocks are distributed on the inner wall of the drill tool, a groove is processed on the contact surface between the blocking block and the side wing, and the groove and the blocking block are in contact with each other when the drill pipe and the drill tool are locked.

[0007] Preferably, two groups of side frames are welded on the right side of the drill tool, and spring rods are movably installed in the side frames. The spring rods are fixedly connected to locking blocks at one end close to the drill rod, and two groups of locking grooves are provided in the middle position of the outer wall of the drill rod. The locking blocks are embedded in the locking grooves, and a movable groove is also processed in the middle position of the outer wall of the drill rod.

[0008] Preferably, the movable groove surrounds the drill rod, and the diameter of the movable groove tends to increase as it approaches the locking groove in the horizontal direction.

[0009] Preferably, the inner wall of the movable groove is inclined near the locking groove, and the inner wall of the locking groove is inclined near the movable groove.

[0010] Preferably, the processing depth of the movable groove is greater than the depth of the locking groove, and the cross-section of the movable groove is a right-angled trapezoidal depression.

[0011] Preferably, a protrusion is welded on one end of the outer wall of the drill rod, and a hook groove is processed on the edge of the outer wall of the drill tool. The hook groove is "L" shaped, and the protrusion abuts against the inside of the hook groove when the drill rod and the drill tool are locked.

[0012] Preferably, the blocking blocks are distributed in six groups in a ring shape in the drilling tool, and the side wings respectively match the shapes of the blocking blocks.

[0013] Preferably, the drill tool and drill rod are both regular hexagons and are nested with each other, and the vertical center lines of the drill rod, drill tool and drill bit coincide with each other.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the downhole control mechanism can not only realize the rapid control and conversion of the connection state of the drill pipe and the drilling tool, but also improve the continuity and efficiency of the drilling operation and adapt to different drilling needs;

[0015] By arranging a driving rod, a fixing part, a drill rod, a side frame, a movable groove, a drilling tool, a slot, a block, a wing, a drill bit, a hook slot, a locking slot, a locking block, a spring rod and a protrusion, when the drill rod and the drilling tool are locked, when the drill rod is driven to rotate by an external driving force, the drilling tool will also rotate accordingly. When switched to a live joint state, the driving rod is slightly rotated in a circular direction by an external driving force. At this time, the slot gradually moves away from the block, and then a horizontal force is applied to the driving rod toward the drill bit. At this time, the spring rod is squeezed, released, and then squeezed by the outer wall of the drill rod at the locking slot, and successfully escapes from the locking slot. It gradually moves to the movable slot with the horizontal movement of the drill rod before rebounding. When the driving rod stops rotating, the spring rod The rod rebounds and is released in the movable groove, and the side wings are also rotated and moved to break away from the limit of the block. Since the processing depth of the movable groove is greater than the locking block, the spring rod will not resist the inner wall of the movable groove after rebounding in the movable groove. Therefore, the drill tool and the drill rod can rotate relative to each other along the axial direction to form a movable joint, which can smoothly control and switch the connection status of the drill rod and the drill tool. Conversely, the operator can intuitively judge the connection status of the drill rod and the drill tool by observing the matching status of the protrusion and the hook groove. Through simple external driving force operation, the connection status of the drill rod and the drill tool can be quickly switched without stopping the drilling operation, which significantly improves the continuity and efficiency of the drilling operation and adapts to different drilling needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the side cross-sectional structure of the blocking block of the utility model;

[0018] Figure 3 For the utility model Figure 1 A partial cross-section at the center is an enlarged structural diagram;

[0019] Figure 4 It is a front view structural diagram of the movable groove of the utility model.

[0020] In the figure: 1. driving rod; 2. fixing piece; 3. drill rod; 4. side frame; 5. movable groove; 6. drilling tool; 7. clamping groove; 8. blocking block; 9. side wing; 10. drill bit; 11. hook groove; 12. locking groove; 13. locking block; 14. spring rod; 15. protrusion. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1: Please refer to Figure 1-4 A downhole control mechanism comprises a drill pipe 3 and a drilling tool 6. A fixing part 2 is installed at the rear end of the drill pipe 3. A driving rod 1 is fixed to the drill pipe 3 through the fixing part 2. The drill pipe 3 is sleeved with the drilling tool 6 on the outside. A drill bit 10 is fixedly mounted on the front end of the drill pipe 3. A plurality of side wings 9 are arranged at the front end of the outer wall of the drill pipe 3. A plurality of blocking blocks 8 are distributed on the inner wall of the drilling tool 6. A groove 7 is processed on the contact surface between the blocking block 8 and the side wing 9. The groove 7 and the blocking block 8 are in contact with each other when the drill pipe 3 and the drilling tool 6 are locked. Two sets of side frames are welded on the right side of the drilling tool 6. 4, spring rods 14 are movably mounted in the side frames 4, and a locking block 13 is fixedly connected to one end of the spring rods 14 near the drill rod 3. Two sets of locking grooves 12 are arranged in the middle of the outer wall of the drill rod 3, and the locking block 13 is engaged with the locking groove 12. A movable groove 5 is also processed in the middle of the outer wall of the drill rod 3. There are six sets of blocking blocks 8 distributed in an annular manner in the drilling tool 6, and the side wings 9 are respectively matched with the shapes of the blocking blocks 8. The drilling tool 6 and the drill rod 3 are both regular hexagons and are nested with each other. The vertical center lines of the drill rod 3, the drilling tool 6 and the drill bit 10 coincide with each other;

[0023] Specifically, Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, when the drill rod 3 and the drill tool 6 are locked, when the drill rod 3 is driven by the external driving force to rotate, the drill tool 6 will also rotate accordingly. When switched to the movable state, the driving rod 1 is slightly rotated in the circumferential direction by the external driving force. At this time, the locking groove 7 gradually moves away from the blocking block 8, and then a horizontal force is applied to the driving rod 1 in the direction of the drill bit 10. At this time, the spring rod 14 is squeezed, released, and then squeezed by the outer wall of the drill rod 3 at the locking groove 12, and successfully escapes from the locking groove 12, and gradually moves to the movable groove 5 with the horizontal movement of the drill rod 3 before rebounding. When the driving rod 1 stops rotating, the spring rod 14 rebounds and releases in the movable groove 5, and the side wing 9 also rotates and moves to escape from the limit of the blocking block 8. Since the processing depth of the movable groove 5 is greater than the locking block 13, the spring rod 14 will not abut against the inner wall of the movable groove 5 after rebounding in the movable groove 5. Therefore, at this time, the drill tool 6 and the drill rod 3 can rotate relative to each other along the axial direction to form a movable joint, so as to smoothly control and convert the connection state of the drill rod 3 and the drill tool 6.

[0024] Embodiment 2: The movable groove 5 surrounds the drill rod 3, and the diameter of the movable groove 5 tends to increase as it approaches the locking groove 12 in the horizontal direction. The inner wall of the movable groove 5 is inclined near the locking groove 12, and the inner wall of the locking groove 12 is inclined near the movable groove 5. The processing depth of the movable groove 5 is greater than the depth of the locking groove 12, and the cross-section of the movable groove 5 is a right-angle trapezoidal depression;

[0025] Specifically, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in the locked state, the protrusion 15 welded on the outer wall of the drill rod 3 is smoothly inserted into the hook groove 11 on the outer wall of the drilling tool 6, and its shape limit prevents the side frame 4 and the drill rod 3 from relative slipping. By adding the limiter, it is easy to intuitively observe the current connection status of the drilling tool 6 and the drill rod 3, and the anti-slip effect is also improved.

[0026] Embodiment 3: A protrusion 15 is welded at one end of the outer wall of the drill rod 3, and a hook groove 11 is processed on the outer wall edge of the drill tool 6. The hook groove 11 is "L" shaped. When the drill rod 3 and the drill tool 6 are locked, the protrusion 15 abuts against the inside of the hook groove 11;

[0027] Specifically, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the drill rod 3 and the drill tool 6 are connected to each other. When operating underground, the connection state is switched by remotely applying a control force to the drive rod 1, so that the drill tool 6 and the drill rod 3 can complete synchronous drilling and relative rotation, so that the drill rod 3 can provide a higher rotation speed based on the drill tool 6 to meet different operation scenarios and needs.

[0028] Working principle: When the drill rod 3 and the drill tool 6 are locked, when the drill rod 3 is driven by the external driving force to rotate, the drill tool 6 will also rotate with it. When it is switched to the live connection state, the driving rod 1 is slightly rotated in the circumferential direction by the external driving force. At this time, the card slot 7 gradually moves away from the block 8, and then a horizontal force is applied to the driving rod 1 in the direction of the drill bit 10. At this time, the spring rod 14 is squeezed, released, and then squeezed by the outer wall of the drill rod 3 at the locking groove 12, and successfully escapes from the locking groove 12, and gradually moves to the movable groove 5 with the horizontal movement of the drill rod 3 before rebounding. When the driving rod 1 is stopped, the spring rod 14 rebounds and releases in the movable groove 5, and the side wing 9 also rotates and moves to escape from the limit of the block 8. Since the processing depth of the movable groove 5 is greater than the locking block 13, the spring rod 14 will not resist the inner wall of the movable groove 5 after rebounding in the movable groove 5. Therefore, at this time, the drill tool 6 and the drill rod 3 can rotate relative to each other in the axial direction to form a live connection, so as to smoothly control and convert the connection state of the drill rod 3 and the drill tool 6, and vice versa.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A downhole control mechanism while drilling, comprising a drill rod (3) and a drilling tool (6), characterized in that: A fixing part (2) is installed at the rear end of the drill rod (3), and a driving rod (1) is fixed to the drill rod (3) through the fixing part (2). A drilling tool (6) is sleeved on the outside of the drill rod (3), and a drill bit (10) is fixedly mounted on the front end of the drill rod (3). A plurality of side wings (9) are arranged at the front end of the outer wall of the drill rod (3), and a plurality of blocking blocks (8) are distributed on the inner wall of the drilling tool (6). A groove (7) is processed on the contact surface between the blocking block (8) and the side wing (9), and the groove (7) and the blocking block (8) are in contact with each other when the drill rod (3) and the drilling tool (6) are locked.

2. The downhole control while drilling mechanism according to claim 1, characterized in that: Two groups of side frames (4) are welded to the right side of the drilling tool (6), and spring rods (14) are movably mounted in the side frames (4). One end of the spring rods (14) close to the drill rod (3) is fixedly connected to a locking block (13). Two groups of locking grooves (12) are arranged in the middle of the outer wall of the drill rod (3), and the locking blocks (13) are engaged with the locking grooves (12). A movable groove (5) is also machined in the middle of the outer wall of the drill rod (3).

3. The downhole control while drilling mechanism according to claim 2, characterized in that: The movable groove (5) surrounds the drill rod (3) for a circle, and the diameter of the movable groove (5) tends to increase as it approaches the locking groove (12) in the horizontal direction.

4. The downhole control while drilling mechanism according to claim 2, characterized in that: The inner wall of the movable groove (5) is inclined on the side close to the locking groove (12), and the inner wall of the locking groove (12) is inclined on the side close to the movable groove (5).

5. The downhole control while drilling mechanism according to claim 2, characterized in that: The processing depth of the movable groove (5) is greater than the depth of the locking groove (12), and the cross section of the movable groove (5) is a right-angled trapezoidal depression.

6. The downhole control while drilling mechanism according to claim 1, characterized in that: A convex block (15) is welded to one end of the outer wall of the drill rod (3), and a hook groove (11) is processed on the edge of the outer wall of the drill tool (6). The hook groove (11) is in an "L" shape. When the drill rod (3) and the drill tool (6) are in a locked state, the convex block (15) abuts against the inside of the hook groove (11).

7. The downhole control while drilling mechanism according to claim 1, characterized in that: The blocking blocks (8) are distributed in six groups in a ring shape inside the drilling tool (6), and the side wings (9) are respectively matched with the shapes of the blocking blocks (8).

8. The downhole control while drilling mechanism according to claim 1, characterized in that: The drilling tool (6) and the drill rod (3) are both regular hexagons and are nested with each other; the vertical center lines of the drill rod (3), the drilling tool (6) and the drill bit (10) coincide with each other.

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