Well digging machine

Abstract

The invention is suitable for the field of well digging equipment, and provides a well digging machine which comprises an inner supporting assembly, a hanging ring, a spring, a gear motor, a connecting sleeve and a drill bit assembly. According to the drilling device, the drill bit assembly can be limited and fixed in a well through the inner supporting assembly, when the drill bit assembly conducts well drilling, the inner supporting assembly is opened by means of gravity formed by the balance weight plate, the gear motor, the connecting sleeve and the drill bit assembly, the contact strength between the multiple inner supporting plates and the inner wall of the well is increased, and the inner supporting plates can be inserted into the inner wall of the well; the inner supporting assembly can be automatically fixed in the well drilling process, the well drilling machine only needs to be connected with a hanging ring through steel wires, the drill bit assembly can be controlled to move into a deep well to conduct well drilling operation through the unwound steel wire ropes, well drilling operation can be conducted without using a large number of drill rods, operation is easy, and the drilling efficiency is improved. And the drilling cost is greatly reduced.

Description

Technical Field

[0001] The present invention belongs to the field of well drilling equipment, and particularly relates to a well drilling machine. Background Art

[0002] In traditional well drilling machines, the derrick and the power part are on the ground or on the sea surface, and the drill bit body is driven by a rotating rod. As the drill bit body goes deeper, the rotating rod becomes longer and longer, and the strength of the rotating rod must be higher accordingly. Correspondingly, the weight of the rotating rod is greater, the well casing is larger, more power is required, and more labor is needed, resulting in higher overall costs. Therefore, a well drilling device is needed to solve the above problems. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a well drilling machine to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A well drilling machine includes an inner support assembly, a lifting ring, a spring, a reduction motor, a connecting sleeve, and a drill bit assembly. The inner support assembly includes a fixed rod, and two fixed blocks are connected to the outside of the fixed rod. One end of each of the two fixed blocks close to each other is respectively connected to one end of a plurality of first connecting rods through a plurality of pin shafts, and one end of each of the plurality of first connecting rods far from each other is respectively hinged to a plurality of inner support plates through pin shafts. Anti-slip grooves are provided on the surfaces of the plurality of inner support plates far from each other. An activity block is slidably connected to the outside of the fixed rod. One end of each of the plurality of second connecting rods close to each other is respectively hinged to the activity block through a plurality of pin shafts, and one end of each of the plurality of second connecting rods far from each other is respectively hinged to a plurality of inner support plates through pin shafts. The bottom end of the fixed rod is connected to a counterweight seat, and the surfaces of the activity block and the upper fixed block far from each other are both connected to a baffle;

[0006] The bottom of the counterweight seat is detachably connected to the reduction motor, and the bottom of the reduction motor is connected to the drill bit assembly through a connecting sleeve.

[0007] In a further technical solution, the connecting sleeve includes a fixed pipe, a connection port is provided on one side of the fixed pipe, two sealing bearings are connected inside the fixed pipe, and a connecting pipe is connected inside the two sealing bearings. The top end of the connecting pipe is connected to the output shaft of the reduction motor.

[0008] In a further technical solution, two through holes are provided inside the connecting pipe, and a cavity is provided between the fixed pipe and the connecting pipe.

[0009] In a further technical solution, the cavity is provided between the two sealing bearings, and a fixed ring is threadedly connected to the bottom of the fixed pipe.

[0010] According to a further technical solution, the drill bit assembly includes a drill pipe, the bottom end of the connecting pipe is connected to the drill pipe, the drill pipe is externally connected to a drill bit body, and a water outlet is provided between the bottom of the drill pipe and the drill bit body.

[0011] According to a further technical solution, the connection port is connected to the cavity, the cavity is connected to two through holes, the through holes are connected to the drill pipe, and the drill pipe is connected to the water outlet.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present invention can limit and fix the drill bit assembly in the well through the inner support assembly. When the drill bit assembly is drilling, the inner support assembly is supported by the gravity composed of the counterweight plate, the reduction motor, the connecting sleeve and the drill bit assembly, and the contact force between the plurality of inner support plates and the inner wall of the well is increased, so that the inner support plates are inserted into the inner wall of the well, and the inner support plates inserted in the inner wall of the well slide downward synchronously under the pull of the downward moving drill bit assembly, so that the inner support assembly can be automatically fixed during the drilling process, so that the well drilling machine only needs to be connected to the lifting ring through the steel wire, and the drill bit assembly can be controlled to move to the deep well for drilling operation through the unwinding steel wire rope, and the drilling operation can be carried out without using a large number of drill rods. Not only is the operation simple, but also the drilling cost is greatly reduced.

[0014] The present invention, by setting a spring, pushes a plurality of inner support plates to approach each other, the spring contracts, moves the drill bit body and the inner support plate into the well, loosens the inner support plate, and the movable block moves upward under the action of the elastic force of the contraction spring. The movable block moving upward drives a plurality of inner support plates to move away from each other through a plurality of second connecting rods. The plurality of inner support plates moving away from each other are spread open and contact with the inner wall of the well. In this process, the inner support assembly contacting with the inner wall of the well can limit the drill bit body, so that the drill bit body can be automatically centered.

[0015] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention in a front view;

[0017] Figure 2 It is a schematic diagram of the structure of the present invention when viewed from above;

[0018] Figure 3 It is a schematic diagram of a sectional structure of a front view of the present invention;

[0019] Figure 4 For the present invention Figure 3 Schematic diagram of the structure enlarged at point A in the middle.

[0020] In the figure: 1. Inner support assembly; 11. Fixed rod; 12. Fixed block; 13. Baffle; 14. First connecting rod; 15. Inner support plate; 16. Anti-slip groove; 17. Movable block; 18. Second connecting rod; 19. Counterweight seat; 2. Suspension ring; 3. Spring; 4. Reducing motor; 5. Connecting sleeve; 51. Fixed pipe; 52. Connecting port; 53. Sealing bearing; 54. Connecting pipe; 55. Through hole; 56. Cavity; 57. Fixed ring; 6. Drill bit assembly; 61. Drill pipe; 62. Drill bit body; 63. Water outlet. Detailed implementation manners

[0021] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0023] As Figures 1 - 4 shown, an embodiment of the present invention provides a well drilling machine, including an inner support assembly 1, a suspension ring 2, a spring 3, a reducing motor 4, a connecting sleeve 5 and a drill bit assembly 6. By providing the inner support assembly 1, the inner support assembly 1 supports the well wall, and the gravity of the well drilling machine drives the inner support assembly 1 to slide downward. The inner support assembly 1 provides an axial rotation resistance to offset the axial force generated during well drilling;

[0024] The inner support assembly 1 includes a fixed rod 11. Two fixed blocks 12 are connected to the outside of the fixed rod 11. The two fixed blocks 12 are respectively connected to the closer ends of a plurality of first connecting rods 14 through a plurality of pin shafts. The farther ends of the plurality of first connecting rods 14 are respectively hinged to a plurality of inner support plates 15 through pin shafts. Anti-slip grooves 16 are formed on the farther sides of the plurality of inner support plates 15. By providing the inner support plates 15, since a plurality of upper and lower through anti-slip grooves are formed on the farther sides of the plurality of inner support plates, on the one hand, the contact area between the inner support plates and the inner wall of the well is reduced. When the inner support plate 15 is subjected to a large positive pressure, the inner support plate 15 can be inserted into the inner wall of the well, so that the inner support plate is not easily rotated on the inner wall of the well, and better provides stable support for the well drilling machine;

[0025] A movable block 17 is slidably connected to the outside of the fixed rod 11. One end of the movable block 17 close to several second connecting rods 18 is hinged to each other through several pin shafts. One end of several second connecting rods 18 away from each other is hinged to several inner support plates 15 through pin shafts respectively. The bottom end of the fixed rod 11 is connected to the counterweight base 19. One side of the movable block 17 and the fixed block 12 located above away from each other are both connected to the baffle 13. By arranging the baffle 13, the two baffles 13 can limit the first connecting rod 14 and the second connecting rod 18 rotating above respectively, so that the first connecting rod 14 and the second connecting rod 18 can rotate to the horizontal state at most;

[0026] The bottom of the counterweight base 19 is detachably connected to the reduction motor 4. The bottom of the reduction motor 4 is connected to the drill bit assembly 6 through a connecting sleeve 5.

[0027] Connect the lifting ring 2 to an external steel wire rope, and the top of the steel wire rope is connected to a retractable steel wire reel. And the connection port 52 is connected to an external water pump through a hose. The external water pump is connected to an external water source through a pipeline. The working water pump can extract water from the external water source. The extracted water enters the cavity 56 through the hose. Then the two sealing bearings 53 block the water in the cavity 56 between the two bearings. The water entering the cavity 56 enters the connecting pipe 54 through the through hole 55. Then the water entering the connecting pipe 54 flows out through the water outlet 63 of the drill pipe 61;

[0028] When the lifting ring 2 is lifted under the action of the external steel wire rope, several inner support plates 15 are close to each other, the spring 3 contracts, and the drill bit body 62 and the inner support plates 15 move into the well. Release the inner support plates 15. The movable block 17 moves upward under the action of the elastic force of the contracting spring 3. The upward moving movable block 17 drives several inner support plates 15 away from each other through several second connecting rods 18. Several inner support plates 15 away from each other contact the inner wall of the well.

[0029] The inner support assembly 1 drives several inner support plates 15 to slide downward on the inner wall of the well under the action of the self-weight of the well drilling machine. During this process, the inner support assembly 1 in contact with the inner wall of the well can limit the drill bit body 62, so that the drill bit body 62 can be automatically centered, so that the drill bit body 62 is located in the middle of the well. And when the bottom end of the drill bit body 62 contacts the bottom of the well, control the reduction motor 4 to work. The working reduction motor 4 drives the connecting pipe 54 to rotate in the two sealing bearings 53. The rotating connecting pipe 54 drives the drill pipe 61 to rotate. The rotating drill pipe 61 drives the drill bit body 62 to rotate. The rotating drill bit body 62 performs drilling operations;

[0030] And when the drill bit body 62 is drilling, under the action of the drilling rig structure composed of the reduction motor 4, the connecting sleeve 5 and the drill pipe 61, the fixing rod 11 exerts an expanding force on a plurality of inner support plates 15 through a plurality of first connecting rods 14, increasing the normal pressure of the inner support plates 15 on the inner wall of the well, so that the inner support plates 15 can be inserted into the inner wall of the well, increasing the rotational friction force between the inner support plates and the inner wall of the well, making it difficult for the expanded inner support assembly 1 to rotate under the action of the reaction force of the reduction motor 4, enabling the working reduction motor 4 to drive the drill bit body 62 to smoothly carry out the drilling operation through the connecting pipe 54 and the drill pipe 61. The water in the drill pipe 61 flows into the drilled soil, and the muddy water flows upward along the well wall;

[0031] As Figure 1 and Figure 4 shown, specifically, the connecting sleeve 5 includes a fixed pipe 51. A connecting port 52 is provided on one side of the fixed pipe 51. Two sealing bearings 53 are connected inside the fixed pipe 51. A connecting pipe 54 is connected inside the two sealing bearings 53. The top end of the connecting pipe 54 is connected to the output shaft of the reduction motor 4.

[0032] In this embodiment, by providing the connecting port 52, the connecting port 52 can be connected to an external water pipe, and the water in the water pipe can flow into the cavity 56 through the connecting port 52;

[0033] The fixed pipe 51 can limit and fix the connecting pipe 54 inside the fixed pipe 51 through the sealing bearings 53.

[0034] As Figure 4 shown, specifically, two through holes 55 are provided inside the connecting pipe 54, and a cavity 56 is provided between the fixed pipe 51 and the connecting pipe 54.

[0035] In this embodiment, the water entering the cavity 56 can enter the drill pipe 61 through the two through holes 55.

[0036] As Figure 4 shown, specifically, the cavity 56 is provided between the two sealing bearings 53, and a fixed ring 57 is threadedly connected to the bottom of the fixed pipe 51.

[0037] In this embodiment, the two sealing bearings 53 can block the water entering the cavity 56, so that the water in the cavity 56 can smoothly flow into the rotating connecting pipe 54 through the through holes 55.

[0038] As Figure 1 and Figure 3As shown, specifically, the drill bit assembly 6 includes a drill pipe 61. The bottom end of the connecting pipe 54 is connected to the drill pipe 61. A drill bit body 62 is connected to the outside of the drill pipe 61. A water outlet 63 is provided between the bottom of the drill pipe 61 and the drill bit body 62. The connection port 52 is in communication with the cavity 56. The cavity 56 is in communication with two through holes 55. The through holes 55 are in communication with the drill pipe 61. The drill pipe 61 is in communication with the water outlet 63.

[0039] In this embodiment, the water entering the drill pipe 61 can flow into the well through the water outlet 63.

[0040] The working principle of the present invention is as follows: When using this well drilling machine, first connect the lifting ring 2 to an external steel wire rope. The top of the steel wire rope is connected to a retractable steel wire reel. At the same time, connect the connection port 52 to an external water pump through a hose. The water pump is then connected to a water source through a pipeline.

[0041] Lowering and positioning: Start the steel wire reel to unwind, and the well drilling machine descends under the action of gravity.

[0042] At this time, push several inner support plates 15 closer to each other, the spring 3 contracts, and move the drill bit body 62 and the inner support plates 15 into the well. When reaching the predetermined position, release the inner support plates 15. The movable block 17 moves upward under the elastic force of the contracted spring 3, and drives the inner support plates 15 to move away from each other through several second connecting rods 18 until they contact the well wall.

[0043] The side of the inner support plate 15 with the anti-slip groove 16 fits against the well wall, realizing the preliminary limitation and automatic centering of the drill bit body 62, and making the drill bit body 62 located in the middle of the well.

[0044] Drilling operation: When the bottom end of the drill bit body 62 contacts the bottom of the well, start the reduction motor 4. The reduction motor 4 drives the connecting pipe 54 to rotate within two sealing bearings 53. The connecting pipe 54 then drives the drill pipe 61 and the drill bit body 62 to rotate, and starts the drilling operation.

[0045] During this process, the drilling rig structure composed of the reduction motor 4, the connecting sleeve 5, the drill pipe 61, etc. has a certain gravity. Under the action of this gravity, the fixed rod 11 exerts a spreading force on a plurality of inner support plates 15 through a plurality of first connecting rods 14, further increasing the normal pressure of the inner support plates 15 on the inner wall of the well, so that the inner support plates 15 are inserted into the inner wall of the well, thereby greatly increasing the rotational friction force between the inner support plates 15 and the inner wall of the well. This makes it difficult for the spread inner support assembly 1 to rotate under the action of the reaction force of the reduction motor 4, ensuring that the reduction motor 4 can drive the drill bit body 62 through the connecting pipe 54 and the drill pipe 61 to smoothly drill the well; at the same time, the external water pump extracts water from the water source, enters the cavity 56 between the fixed pipe 51 and the connecting pipe 54 through the hose from the connection port 52, then flows into the drill pipe 61 through the through hole 55 in the connecting pipe 54, and finally flows out from the water outlet 63 between the drill pipe 61 and the drill bit body 62, flows into the drilled soil, mixes the soil into muddy water, and makes it flow upward along the well wall;

[0046] Continuous drilling and downward movement: As the drilling depth increases, under the action of the overall gravity of the well drilling machine, the inner support plates 15 stuck in the inner wall of the well slide downward synchronously, continuously providing stable support for the well drilling machine, offsetting the axial force generated by drilling, and ensuring the stable and efficient progress of the entire drilling process.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A well drilling device, comprising an inner support assembly (1), a lifting ring (2), a spring (3), a reduction motor (4), a connecting sleeve (5) and a drill bit assembly (6), characterized in that: The inner support assembly (1) comprises a fixed rod (11), the fixed rod (11) is externally connected to two fixed blocks (12), the two fixed blocks (12) are respectively connected to a plurality of first connecting rods (14) at one end through a plurality of pins, the plurality of first connecting rods (14) at one end away from the other end are respectively hinged to a plurality of inner support plates (15) through pins, and the plurality of inner support plates (15) are each provided with an anti-slip groove (16) on one side away from the other side. 1) An external sliding connection is provided with a movable block (17), the movable block (17) is hinged to the ends of the plurality of second connecting rods (18) respectively through a plurality of pins, the ends of the plurality of second connecting rods (18) away from each other are hinged to the plurality of inner support plates (15) respectively through pins, the bottom end of the fixed rod (11) is connected to the counterweight seat (19), and the movable block (17) and the fixed block (12) located above are connected to the baffle plate (13) on their sides away from each other; The bottom of the counterweight seat (19) is detachably connected to the reduction motor (4), and the bottom of the reduction motor (4) is connected to the drill bit assembly (6) via a connecting sleeve (5).

2. The well drilling equipment according to claim 1, characterized in that: The connecting sleeve (5) comprises a fixed tube (51), a connecting port (52) is provided on one side of the fixed tube (51), two sealed bearings (53) are connected inside the fixed tube (51), a connecting tube (54) is connected inside the two sealed bearings (53), and the top end of the connecting tube (54) is connected to the output shaft of the reduction motor (4).

3. The well drilling equipment according to claim 2, characterized in that: Two through holes (55) are provided in the connecting pipe (54), and a cavity (56) is provided between the fixing pipe (51) and the connecting pipe (54).

4. The well drilling equipment according to claim 3, characterized in that: The cavity (56) is arranged between two sealing bearings (53), and a fixing ring (57) is threadedly connected to the bottom of the fixing tube (51).

5. The well drilling equipment according to claim 2, characterized in that: The drill bit assembly (6) comprises a drill pipe (61), the bottom end of the connecting pipe (54) is connected to the drill pipe (61), the drill pipe (61) is externally connected to a drill bit body (62), and a water outlet (63) is provided between the bottom of the drill pipe (61) and the drill bit body (62).

6. The well drilling equipment according to claim 2, characterized in that: The connection port (52) is in communication with the cavity (56), the cavity (56) is in communication with two through holes (55), the through holes (55) are in communication with the drill pipe (61), and the drill pipe (61) is in communication with the water outlet (63).

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