Detachable drill rod for geological prospecting and drilling

Abstract

The utility model relates to the technical field of drilling, and discloses a detachable drill rod for geological prospecting drilling, which comprises a plurality of rod bodies and a rod head, the plurality of rod bodies are connected end to end, the rod head is connected with the uppermost rod body, the front and rear ends of the rod bodies and the bottom end of the rod head are all provided with connecting areas in advance, and the connecting areas are connected with the rod head. And a plurality of threaded holes are formed in the rod body and the rod head at the position of the connecting area. Connecting sleeves are arranged at the connecting areas of the adjacent rod bodies and the connecting areas of the rod bodies and the rod heads, and the connecting areas of the adjacent rod bodies and the connecting areas of the rod heads are all sleeved with the connecting sleeves. Connecting holes are formed in the positions, corresponding to the threaded holes of the connecting areas, of the connecting sleeve, and the connecting sleeve, the rod body and the rod head are fixed through connecting bolts in threaded connection with the connecting holes and the threaded holes. According to the drill rod, the connecting sleeve and the connecting bolt are matched for fixing, torsion generated when the drill rod rotates acts on the connecting bolt, rotation and connection of the drill rod are not directly affected, the drill rod is not affected by the rotation direction of the drill rod, and fixing between the drill rods is stable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling, in particular to a detachable drill rod for geological prospecting drilling. Background Art

[0002] Drilling is mainly used to mine natural resources underground or under the sea, or to take a cross-section of the strata and extract physical samples to provide experiments and obtain relevant data. For example, in the process of prospecting for coal mines, drilling is one of the common methods. Drilling uses drill rods, and most of the current drill rods are multi-section detachable.

[0003] At present, the connection method between drill pipes is mostly direct thread connection, that is, adjacent drill pipes are directly screwed together by relying on the matching threads at their head and tail ends. Since the drill pipe needs to be rotated, the thread direction is opposite to the direction of rotation to avoid falling off during rotation. However, when the drill pipe is reversed to be taken out, if the drill pipe is stuck in the rock formation or the drill bit is stuck in the rock, the reverse force is large, which may cause it to loosen. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a detachable drill rod for geological prospecting drilling to solve the problems in the background technology.

[0006] (II) Technical solution

[0007] In order to solve the above problems, the utility model provides the following technical solutions:

[0008] A detachable drill rod for geological prospecting and drilling includes a plurality of rod bodies and a rod head. The plurality of rod bodies are connected end to end, and the rod head is connected to the uppermost rod body. Connection areas are preset at the front and rear ends of the rod body and the bottom end of the rod head. The rod body and the rod head at the connection area are provided with a plurality of threaded holes. Connection sleeves are provided at the connection areas of adjacent rod bodies and the rod body and the rod head, and the connection areas of adjacent rod bodies and the rod head are all sleeved in the connection sleeves. A connection hole is provided at the threaded hole position corresponding to the connection area on the connection sleeve, and the connection sleeve is fixed to the rod body and the rod head by a connection bolt that is screwed with the inner thread of the connection hole.

[0009] Preferably, the connection area is recessed on the outer peripheral surface of the rod body, and a concave hole is opened on the outer peripheral surface of the connecting sleeve at a position corresponding to the connecting hole, and the diameter of the concave hole is larger than the diameter of the connecting hole.

[0010] Preferably, an annular flange is installed at the middle position of the inner wall of the connecting sleeve, and the end of the connecting area abuts against the side of the flange.

[0011] Preferably, a plurality of equally spaced convex teeth are installed on both side surfaces of the flange, and a plurality of equally spaced tooth grooves are provided on the ends of the connecting area of ​​the rod body and the rod head, the tooth grooves correspond to the convex teeth, and the convex teeth abut against the tooth grooves.

[0012] Preferably, an adapter sleeve is installed at a position corresponding to the connection area of ​​the outer wall of the rod head, and an adapter bolt is screwed on the adapter sleeve at a position corresponding to the threaded hole. The adapter bolt passes through the connection hole of the connecting sleeve and the threaded hole of the rod head and is screwed and fixed.

[0013] Preferably, a concave cavity is provided on the inner circumferential wall of the adapter sleeve corresponding to the position of the adapter bolt, and a movable ring is mounted on the adapter bolt in the concave cavity, the diameter of the ring is smaller than the diameter of the concave hole, and multiple movable rods penetrating to the outer circumferential surface of the adapter sleeve are installed on the ring, and a spring is mounted on the movable rod in the concave cavity, and both ends of the spring are fixed to the ring and the adapter sleeve at corresponding positions, and the end of the movable rod on the outer periphery of the adapter sleeve abuts against the adapter bolt.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a detachable drill rod for geological prospecting drilling, which has the following beneficial effects:

[0016] 1. The drill rod is fixed by the cooperation of the connecting sleeve and the connecting bolt. The torque when the drill rod rotates acts on the connecting bolt, which has no direct effect on the rotation and connection of the drill rod, and is not affected by the rotation direction of the drill rod. The fixation between the drill rods is stable and reliable.

[0017] 2. The drill pipe is provided with convex teeth inside the connecting sleeve, which cooperate with the tooth grooves at the end of the drill pipe to form a counteracting relationship. On the basis of the connecting bolts, additional force points are added to distribute the torque.

[0018] 3. The drill rod has a collar disposed in the adapter sleeve, and the collar is extended or retracted by the spring when the adapter bolt is screwed in and out, so as to form an additional fixed force point, thereby comprehensively improving the connection strength and stability between the rod bodies and between the rod body and the rod head. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the appearance diagram of the utility model;

[0020] Figure 2 It is a cross-sectional view of the utility model;

[0021] Figure 3 It is a three-dimensional diagram of the connecting sleeve in the utility model;

[0022] Figure 4 This is an enlarged view of the connection area in the utility model

[0023] Figure 5 It is an enlarged view of point A in the utility model;

[0024] Figure 6 It is an enlarged view of point B in the utility model;

[0025] Figure 7 This is a schematic diagram of the connection between the rod body and the rod head in the utility model;

[0026] Figure 8 It is an enlarged view of point C in the utility model.

[0027] In the figure: 1. rod body; 2. connecting sleeve; 3. rod head; 4. adapter sleeve; 5. connecting area; 6. threaded hole; 7. recessed hole; 8. connecting hole; 9. connecting bolt; 10. adapter bolt; 11. flange; 12. convex teeth; 13. tooth grooves; 14. collar; 15. movable rod; 16. spring; 17. recessed cavity. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] See also Figure 1-8 A detachable drill rod for geological prospecting and drilling, comprising a plurality of rod bodies 1 and a rod head 3, wherein the plurality of rod bodies 1 are connected end to end, and a connection area 5 is preset at the front end and the rear end of the rod body 1, and the connection area 5 is recessed in the outer peripheral surface of the rod body 1, and a plurality of threaded holes 6 are opened on the rod body 1 at the connection area 5 position, and a connection sleeve 2 is provided at the connection area 5 position of adjacent rod bodies 1, and the connection areas 5 of adjacent rod bodies 1 are all sleeved in the connection sleeve 2, and a connection hole 8 is opened on the connection sleeve 2 at the position corresponding to the threaded hole 6 of the connection area 5, and a concave hole 7 is opened at the outer peripheral surface of the connection sleeve 2 at the position corresponding to the connection hole 8;

[0030] The diameter of the recessed hole 7 is larger than the diameter of the connecting hole 8, and the diameter of the connecting hole 8 is equal to the diameter of the threaded hole 6. The inner wall of the connecting hole 8 is also threaded. The connecting sleeve 2 and the rod body 1 are fixed by a connecting bolt 9 which is screwed together with the inner thread of the threaded hole 6. The nut of the connecting bolt 9 is located in the recessed hole 7, and the top of the nut does not protrude from the recessed hole 7. The outer peripheral surface of the connecting sleeve 2 is flush with the outer peripheral surface of the rod body 1. The rod head 3 is located at the top of the uppermost rod body 1 of the multiple rod bodies 1. A connecting area 5 is also preset at the upper bottom end of the rod head 3. The rod head 3 and the rod body 1 are also fixed by the connecting sleeve 2 and the connecting bolt 9.

[0031] When in use, the rod head 3 is fixed to the drilling machine, and then relying on the connecting sleeve 2, as the drilling depth increases, multiple rod bodies 1 can be connected in sequence. The connections between the rod bodies 1 and the rod body 1 and the rod head 3 are fixed by connecting bolts 9. When the multiple rod bodies 1 rotate, the torque between them directly acts on the connecting bolts 9. Compared with the direct connection method of the drill pipe thread, the rod body 1 will not be driven to rotate by the thread direction when it is rotating forward or reverse, thereby ensuring a reliable and stable connection.

[0032] In this embodiment, an annular flange 11 is integrally formed and installed in the middle position of the inner wall of the connecting sleeve 2, and a plurality of equally spaced convex teeth 12 are integrally formed and installed on both side surfaces of the flange 11. The convex teeth 12 are arranged in a semi-elliptical structure, and a plurality of equally spaced tooth grooves 13 are preset at the end of the connecting area 5 on the rod body 1. The tooth grooves 13 correspond to the convex teeth 12, and the convex teeth 12 abut against the tooth grooves 13. At the same time, the end of the connecting area 5 abuts against the flange 11, and the tooth grooves 13 are also arranged at the end of the connecting area 5 of the rod head 3.

[0033] After the rod body 1 and the connecting sleeve 2 are docked and fixed, the rotating torque of the rod body 1 acts not only on the connecting bolt 9, but also on the convex teeth 12. The convex teeth 12 abut against the tooth grooves 13 to form an additional torque compensation part, thereby reducing the force of the torque on the connecting bolt 9, so that the torque is distributed, avoiding shear damage to the connecting bolt 9 and direct disconnection when the torque is too large.

[0034] In this embodiment, an adapter sleeve 4 is welded and installed at a position corresponding to the connection area 5 on the outer wall of the rod head 3, and an adapter bolt 10 is screwed on the corresponding threaded hole 6 on the adapter sleeve 4. The adapter bolt 10 passes through the connection hole 8 of the connecting sleeve 2 and the threaded hole 6 of the rod head 3 and is screwed and fixed.

[0035] The adapter sleeve 4 increases the connection strength between the rod head 3 and the rod body 1 . Meanwhile, compared with the connecting bolt 9 , the adapter bolt 10 has a longer connection length, more connecting parts and a higher connection strength.

[0036] In this embodiment, a concave cavity 17 is preset on the inner wall of the adapter sleeve 4 at the position corresponding to the adapter bolt 10, and the diameter of the concave cavity 17 is larger than the diameter of the adapter bolt 10. The adapter bolt 10 in the concave cavity 17 is sleeved with a ring 14 that moves along the adapter bolt 10, and the diameter of the ring 14 is smaller than the diameter of the recessed hole 7. A plurality of movable rods 15 that penetrate the outer circumference of the adapter sleeve 4 are welded and installed on the ring 14. The adapter sleeve 4 is opened with holes corresponding to the positions of the movable rods 15, and the movable rods 15 are movably sleeved into the holes. A spring 16 is sleeved on the movable rod 15 in the concave cavity 17, and both ends of the spring 16 are welded and fixed to the ring 14 and the adapter sleeve 4 at the corresponding positions. When the spring 16 is in the initial position, the ring 14 is located in the concave cavity 17, and the end of the movable rod 15 on the outer periphery of the adapter sleeve 4 abuts against the adapter bolt 10.

[0037] When the adapter bolt 10 is screwed in and fixed, it will push the movable rod 15 to move inward, so that the spring 16 is stretched, and then the ring 14 is pushed to move into the recessed hole 7, thereby forming an additional force point, increasing the connection strength between the rod body 1 and the rod head 3. When the adapter bolt 10 is screwed out, the spring 16 returns to its original position and retracts, pulling the ring 14 into the recessed cavity 17. At this time, the connecting sleeve 2 can be removed by pulling it out.

Claims

1. A detachable drill rod for geological prospecting and drilling, comprising a plurality of rod bodies (1) and a rod head (3), characterized in that: A plurality of rod bodies (1) are connected end to end, a rod head (3) is connected to the uppermost rod body (1), front and rear ends of the rod body (1) and the bottom end of the rod head (3) are preset with connection areas (5), and a plurality of threaded holes (6) are opened on the rod body (1) and the rod head (3) at the connection area (5); adjacent rod bodies (1) and the connection areas (5) of the rod body (1) and the rod head (3) are provided with connection sleeves (2), and the connection areas (5) of adjacent rod bodies (1) and the rod head (3) are all sleeved in the connection sleeves (2); a connection hole (8) is opened on the connection sleeve (2) at a position corresponding to the threaded hole (6) of the connection area (5), and the connection sleeve (2) and the rod body (1) and the rod head (3) are fixed by a connection bolt (9) which is screwed with the inner thread of the connection hole (8) and the threaded hole (6).

2. The detachable drill rod for geological prospecting drilling according to claim 1, characterized in that: The connection area (5) is recessed on the outer peripheral surface of the rod body (1), and a concave hole (7) is formed on the outer peripheral surface of the connection sleeve (2) at a position corresponding to the connection hole (8), and the diameter of the concave hole (7) is larger than the diameter of the connection hole (8).

3. The detachable drill rod for geological prospecting drilling according to claim 2, characterized in that: An annular flange (11) is installed at the middle position of the inner wall of the connecting sleeve (2), and the end of the connecting area (5) abuts against the side of the flange (11).

4. The detachable drill rod for geological prospecting drilling according to claim 3, characterized in that: Both sides of the flange (11) are provided with a plurality of equally spaced convex teeth (12); the ends of the connecting area (5) on the rod body (1) and the rod head (3) are provided with a plurality of equally spaced tooth grooves (13); the tooth grooves (13) correspond to the convex teeth (12), and the convex teeth (12) abut against the tooth grooves (13).

5. The detachable drill rod for geological prospecting drilling according to claim 1, characterized in that: An adapter sleeve (4) is installed at a position of the outer wall of the rod head (3) corresponding to the connection area (5), and an adapter bolt (10) is screwed onto the adapter sleeve (4) at a position corresponding to the threaded hole (6). The adapter bolt (10) passes through the connection hole (8) of the connection sleeve (2) and the threaded hole (6) of the rod head (3) and is screwed and fixed.

6. The detachable drill rod for geological prospecting drilling according to claim 5, characterized in that: A concave cavity (17) is provided on the inner circumferential wall of the adapter sleeve (4) at a position corresponding to the adapter bolt (10); a movable collar (14) is sleeved on the adapter bolt (10) in the concave cavity (17); the diameter of the collar (14) is smaller than the diameter of the concave hole (7); a plurality of movable rods (15) penetrating the outer circumferential surface of the adapter sleeve (4) are installed on the collar (14); a spring (16) is sleeved on the movable rod (15) in the concave cavity (17); two ends of the spring (16) are fixed to the collar (14) and the adapter sleeve (4) at corresponding positions; and the ends of the movable rods (15) on the outer circumference of the adapter sleeve (4) abut against the adapter bolt (10).

Images