Double-layer quick-pushing vertical drilling tool

Abstract

The utility model belongs to the technical field of well drilling, and particularly relates to a double-layer fast-pushing vertical well drilling tool which comprises an outer shell, a main shaft is rotationally connected to the interior of the outer shell, and a guide hole drill bit is installed at the bottom of the main shaft. The main shaft is driven by drilling driving equipment to rotate, so that the guide hole drill bit drills a section of small-diameter guide hole and destroys a stress field of a stratum to be drilled, and meanwhile, the main shaft drives the reaming drill bit outside the rotating sleeve to rotate through transmission matching of the transmission assembly, so that the stress of the stratum to be drilled by the reaming drill bit is effectively released; the mechanical drilling speed is increased, the service life of the drill bit is prolonged, the drilling cost is reduced, the driving force of the transmission assembly and the driving force of the single drilling driving equipment are transmitted to the reaming drill bit and the guide drill bit respectively, and the cost is relatively saved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling, in particular to a double-layer fast-push vertical drilling tool. Background Art

[0002] At present, the number of deep wells drilled for oil field exploration is increasing year by year. With the increase of well depth, not only the pressure holding effect of drilling fluid column on the formation is intensified, but also the strength, vertical ground stress, horizontal ground stress, etc. of the formation rock itself increase accordingly, the drillability of the formation rock deteriorates, resulting in a decrease in mechanical drilling speed, and has seriously affected the drilling cycle and drilling cost of the whole well.

[0003] The existing Chinese patent with the announcement number CN206000453U discloses a two-stage and two-speed drilling tool. The tool mainly solves the problem that the existing two-stage cutting structure drill bit can only drill at a single speed, which affects the overall life of the drill bit and reduces the drilling mechanical speed. The tool is characterized in that: the outer shell (1) is threadedly connected to the reaming drill bit (8), the outer shell (1) is equipped with a main shaft (3), the upper end of the main shaft is threadedly connected to a pressure cap (2), and the lower end of the main shaft (3) is threadedly connected to a pilot drill bit (10); an annular space is provided between the outer shell (1) and the main shaft and the pressure cap, and the outer wall of the main shaft (3) below the pressure cap is sequentially installed with a centering bearing A (4), a hydraulic motor (5), a centering bearing B (6) and a thrust bearing (7); one end of the main shaft is provided with a diversion channel; the pilot drill bit (10) and the reaming drill bit (8) are respectively provided with water holes A and water holes B. The two-stage and two-speed drilling tool can significantly improve the drilling mechanical drilling speed and reduce the drilling cost.

[0004] In view of the above and existing related technologies, the inventors believe that the following defects often exist: the device drives the pilot drill bit and the reaming drill bit respectively through two driving modes, the cost is relatively high, and improvement is needed; therefore, a double-layer fast-push vertical drilling tool is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the utility model proposes a double-layer fast-push vertical drilling tool.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a double-layer fast-push vertical drilling tool described in the utility model comprises an outer shell, the interior of the outer shell is rotatably connected with a main shaft, a pilot drill bit is installed at the bottom of the main shaft, a mounting groove is provided at the bottom of the outer shell, a transmission assembly is installed inside the mounting groove, the transmission assembly comprises a gear ring 1, the gear ring 1 is fixedly installed on the outside of the main shaft, a connecting assembly is installed at the bottom of the main shaft, the connecting assembly comprises a connecting hole 1, a slot and a connecting hole 2, the connecting hole 1 is provided on the lower surface of the main shaft, the main shaft is connected to the driving shaft of the drilling drive equipment, and the outer shell is provided with a mounting groove. The main body is connected to the fixing bracket of the drilling equipment, so that when the drilling drive equipment drives the main shaft to rotate, the outer shell will not rotate along with it, and the main shaft is driven to rotate by the drilling drive equipment, so that the pilot drill bit drills a small diameter pilot hole, destroying the stress field of the formation to be drilled. At the same time, the main shaft drives the reaming drill bit outside the rotating sleeve to rotate through the transmission cooperation of the gear ring 1, the gear and the gear ring 2, so that the formation stress of the reaming drill bit to be drilled is effectively released, thereby accelerating the mechanical drilling speed, extending the service life of the drill bit, and reducing the drilling cost. In addition, the driving force of the single drilling drive equipment is transmitted to the reaming drill bit and the pilot drill bit respectively through the transmission assembly, which saves relatively cost.

[0007] Preferably, a side wall of the gear ring 1 is meshedly connected with a gear, the gear is rotatably connected to the outer shell, and the outside of the gear is meshedly connected with the gear ring 2.

[0008] Preferably, a rotating sleeve is fixedly connected to the bottom of the gear ring 2, and the rotating sleeve is rotatably connected to the outer shell. A reaming drill bit is installed on the outside of the rotating sleeve. Through the transmission cooperation of the gear ring 1, the gear and the gear ring 2, the relative rotation speeds and drilling pressures of the reaming drill bit and the pilot drill bit are different.

[0009] Preferably, the top of the rotating sleeve is fixedly connected to the limiting layer.

[0010] Preferably, a plurality of limiting grooves are provided on the outer surface of the rotating sleeve.

[0011] Preferably, the slot is opened on the top of the pilot drill bit, the bottom end of the main shaft is inserted into the slot, and the second connecting hole is opened on the side wall of the pilot drill bit.

[0012] Preferably, a bolt is inserted into the interior of the second connecting hole, and the bolt passes through the first connecting hole, and a nut is threadedly connected to the surface of the bolt.

[0013] Preferably, the connecting assembly further comprises a limiting sleeve, wherein the limiting sleeve is arranged on the outside of the main shaft and is located above the pilot drill bit.

[0014] Preferably, the connecting assembly also includes a plurality of raised layers, which are fixedly mounted on the inner side wall of the reaming drill bit. When installing the drill bit, the raised layer is inserted into the limiting groove, and the reaming drill bit is pressed against the limiting layer, so that the reaming drill bit is driven to rotate when the rotating sleeve rotates, and then the limiting sleeve is put on the main shaft. Finally, the guide drill bit is connected to the main shaft by the cooperation of bolts and nuts. After the guide drill bit is fixed, the reaming drill bit is limited and fixed by the limiting sleeve, and then the double drill bits can be fixed by fixing the single drill bit, thereby saving installation and disassembly time and realizing rapid installation of the drill bit. When replacing the drill bit, the bolts and nuts are removed, the drill bit falls off, and the drill bit can be quickly replaced.

[0015] The utility model is beneficial in that:

[0016] 1. The utility model drives the main shaft to rotate through the drilling drive equipment, so that the pilot drill bit drills a small diameter pilot hole, destroying the stress field of the formation to be drilled. At the same time, the main shaft drives the reaming drill bit outside the rotating sleeve to rotate through the transmission cooperation of the transmission assembly, so that the formation stress of the formation to be drilled by the reaming drill bit is effectively released, thereby accelerating the mechanical drilling speed, extending the service life of the drill bit, and reducing the drilling cost. In addition, the driving force of the single drilling drive equipment is transmitted to the reaming drill bit and the pilot drill bit respectively through the transmission assembly, which is relatively cost-saving.

[0017] 2. After the pilot drill bit is connected to the main shaft by the cooperation of bolts and nuts, the reaming drill bit is limited and fixed by a limiting sleeve, and then the double drill bits can be fixed by fixing the single drill bit, which saves installation and disassembly time and realizes rapid installation and disassembly of the drill bits. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

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

[0021] Figure 3 This is a schematic diagram of the transmission assembly structure of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the reamer drill bit and the outer shell of the utility model;

[0023] Figure 5This is an exploded view of the connection component of the utility model.

[0024] In the figure: 1. outer shell; 2. main shaft; 3. pilot drill bit; 4. mounting groove; 5. transmission assembly; 51. gear ring 1; 52. gear; 53. gear ring 2; 54. rotating sleeve; 55. limiting layer; 56. limiting groove; 6. reaming drill bit; 7. connecting assembly; 71. connecting hole 1; 72. slot; 73. connecting hole 2; 74. bolt; 75. nut; 76. limiting sleeve; 77. raised layer. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figure 1-5 As shown, a double-layer fast-push vertical drilling tool comprises an outer shell 1, a main shaft 2 is rotatably connected inside the outer shell 1, a pilot drill bit 3 is installed at the bottom of the main shaft 2, a mounting groove 4 is provided at the bottom of the outer shell 1, a transmission assembly 5 is installed inside the mounting groove 4, the transmission assembly 5 comprises a gear ring 1 51, the gear ring 1 51 is fixedly installed on the outside of the main shaft 2, a connecting assembly 7 is installed at the bottom of the main shaft 2, the connecting assembly 7 comprises a connecting hole 1 71, a slot 72 and a connecting hole 2 73, the connecting hole 1 71 is provided on the lower surface of the main shaft 2, the main shaft 2 is connected to the driving shaft of the drilling drive device, the outer shell 1 is connected to the fixing bracket of the drilling equipment, so that When the drilling drive device drives the main shaft 2 to rotate, the outer shell 1 will not rotate along with it. The main shaft 2 is driven to rotate by the drilling drive device, so that the pilot drill bit 3 drills a small-diameter pilot hole to destroy the stress field of the formation to be drilled. At the same time, the main shaft 2 drives the reaming drill bit 6 outside the rotating sleeve 54 to rotate through the transmission cooperation of the gear ring 1 51, the gear 52 and the gear ring 2 53, so that the formation stress of the reaming drill bit 6 to be drilled is effectively released, thereby accelerating the mechanical drilling speed, extending the service life of the drill bit, and reducing the drilling cost. In addition, the driving force of the single drilling drive device is transmitted to the reaming drill bit 6 and the pilot drill bit 3 respectively through the transmission assembly 5, which is relatively cost-saving.

[0027] The side wall of the gear ring 1 51 is meshedly connected with a gear 52 , the gear 52 is rotatably connected to the outer shell 1 , and the outside of the gear 52 is meshedly connected with a gear ring 2 53 .

[0028] A rotating sleeve 54 is fixedly connected to the bottom of the gear ring 2 53, and the rotating sleeve 54 is rotatably connected to the outer shell 1. A reaming drill bit 6 is installed on the outside of the rotating sleeve 54. Through the transmission cooperation of the gear ring 1 51, the gear 52 and the gear ring 2 53, the relative rotation speed and drilling pressure of the reaming drill bit 6 and the pilot drill bit 3 are different.

[0029] The top of the rotating sleeve 54 is fixedly connected to the limiting layer 55 .

[0030] A plurality of limiting grooves 56 are formed on the outer surface of the rotating sleeve 54 .

[0031] The slot 72 is formed on the top of the pilot drill bit 3 , the bottom end of the main shaft 2 is inserted into the slot 72 , and the second connecting hole 73 is formed on the side wall of the pilot drill bit 3 .

[0032] A bolt 74 is inserted into the second connection hole 73 , and the bolt 74 passes through the first connection hole 71 . A nut 75 is threadedly connected to the surface of the bolt 74 .

[0033] The connecting assembly 7 further comprises a limiting sleeve 76 , which is sleeved on the outside of the main shaft 2 and is located above the pilot drill bit 3 .

[0034] The connecting assembly 7 also includes a plurality of raised layers 77, which are fixedly mounted on the inner side wall of the reaming drill bit 6. When installing the drill bit, the raised layer 77 is inserted into the interior of the limiting groove 56, and the reaming drill bit 6 is pressed against the limiting layer 55, so that the reaming drill bit 6 is driven to rotate when the rotating sleeve 54 rotates, and then the main shaft 2 is sleeved with the limiting sleeve 76. Finally, the pilot drill bit 3 is connected to the main shaft 2 by the cooperation of the bolt 74 and the nut 75. After the pilot drill bit 3 is fixed, the reaming drill bit 6 is limited and fixed by the limiting sleeve 76, and then the double drill bits can be fixed by fixing the single drill bit, thereby saving installation and disassembly time and realizing rapid installation of the drill bit. When replacing the drill bit, the bolt 74 and the nut 75 are removed, the drill bit falls off, and the drill bit can be quickly replaced.

[0035] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and a suitable controller should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and does not explain the electrical control.

[0036] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art.

[0037] Working principle: the main shaft 2 is connected to the driving shaft of the drilling drive device, and the outer shell 1 is connected to the fixing bracket of the drilling device, so that when the drilling drive device drives the main shaft 2 to rotate, the outer shell 1 will not rotate with it, and the main shaft 2 is driven by the drilling drive device to rotate, so that the pilot drill bit 3 drills a small diameter pilot hole, destroying the stress field of the formation to be drilled. At the same time, the main shaft 2 drives the reaming drill bit 6 outside the rotating sleeve 54 to rotate through the transmission cooperation of the gear ring 1 51, the gear 52 and the gear ring 2 53, so that the formation stress of the reaming drill bit 6 to be drilled is effectively released, thereby accelerating the mechanical drilling speed, extending the service life of the drill bit, and reducing the drilling cost. In addition, the driving force of the single drilling drive device is transmitted to the reaming drill bit 6 and the pilot drill bit 3 respectively through the transmission assembly 5, which is relatively cost-saving.

[0038] When installing the drill bit, the protruding layer 77 is inserted into the interior of the limiting groove 56, and the reaming drill bit 6 is pressed against the limiting layer 55, so that the rotating sleeve 54 rotates to drive the reaming drill bit 6 to rotate, and then the main shaft 2 is sleeved on the limiting sleeve 76. Finally, the pilot drill bit 3 is connected to the main shaft 2 by the cooperation of the bolt 74 and the nut 75. After the pilot drill bit 3 is fixed, the reaming drill bit 6 is limited and fixed by the limiting sleeve 76, and then the double drill bits can be fixed by fixing the single drill bit, saving installation and disassembly time and realizing rapid installation of the drill bit. When replacing the drill bit, the bolt 74 and the nut 75 are removed, the drill bit falls off, and the drill bit can be quickly replaced.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A double-layer fast-push vertical drilling tool, comprising an outer shell (1), characterized in that: The outer shell (1) is rotatably connected to a main shaft (2), a pilot drill bit (3) is installed at the bottom of the main shaft (2), a mounting groove (4) is provided at the bottom of the outer shell (1), a transmission assembly (5) is installed inside the mounting groove (4), the transmission assembly (5) comprises a gear ring 1 (51), the gear ring 1 (51) is fixedly installed on the outside of the main shaft (2), a connecting assembly (7) is installed at the bottom of the main shaft (2), the connecting assembly (7) comprises a connecting hole 1 (71), a slot (72) and a connecting hole 2 (73), the connecting hole 1 (71) is provided on the lower surface of the main shaft (2).

2. The double-layer fast-push vertical drilling tool according to claim 1, characterized in that: The side wall of the first gear ring (51) is meshedly connected with a gear (52), the gear (52) is rotationally connected to the outer shell (1), and the outside of the gear (52) is meshedly connected with a second gear ring (53).

3. The double-layer fast-push vertical drilling tool according to claim 2, characterized in that: A rotating sleeve (54) is fixedly connected to the bottom of the second gear ring (53), the rotating sleeve (54) is rotatably connected to the outer shell (1), and a reaming drill bit (6) is installed outside the rotating sleeve (54).

4. The double-layer fast-push vertical drilling tool according to claim 3, characterized in that: The top of the rotating sleeve (54) is fixedly connected to a limiting layer (55).

5. The double-layer fast-push vertical drilling tool according to claim 3, characterized in that: The outer surface of the rotating sleeve (54) is provided with a plurality of limiting grooves (56).

6. The double-layer fast-push vertical drilling tool according to claim 1, characterized in that: The slot (72) is provided at the top of the pilot drill bit (3), the bottom end of the main shaft (2) is inserted into the slot (72), and the second connecting hole (73) is provided on the side wall of the pilot drill bit (3).

7. The double-layer fast-push vertical drilling tool according to claim 6, characterized in that: A bolt (74) is inserted into the second connection hole (73), and the bolt (74) passes through the first connection hole (71), and a nut (75) is threadedly connected to the surface of the bolt (74).

8. The double-layer fast-push vertical drilling tool according to claim 1, characterized in that: The connection assembly (7) further comprises a limiting sleeve (76), wherein the limiting sleeve (76) is sleeved on the outside of the main shaft (2), and the limiting sleeve (76) is located above the pilot drill bit (3).

9. The double-layer fast-push vertical drilling tool according to claim 1, characterized in that: The connection assembly (7) further comprises a plurality of raised layers (77), wherein the raised layers (77) are fixedly mounted on the inner side wall of the reaming drill bit (6).

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