CN114412380A - Impact-resistant screw drilling tool - Google Patents

Abstract

The invention relates to the technical field of drilling equipment, and particularly discloses an impact-resistant screw drilling tool which comprises an outer shell, a rotating shaft, a buffer sleeve, a connecting joint and a first buffer assembly, wherein the rotating shaft is rotatably arranged in the outer shell, the lower end of the rotating shaft extends out of the outer shell, the buffer sleeve and the connecting joint are sleeved at the lower end part of the rotating shaft, the first buffer assembly comprises a first wedge block, a sliding block, a second wedge block and a first spring, the sliding block is slidably arranged in a sliding groove, the bottom of the first wedge block is fixedly connected with the sliding block, the second wedge block is fixedly connected with the connecting joint, one end of the first spring is fixedly connected with the side wall of the sliding groove, the other end of the first spring is fixedly connected with the first wedge block, and the inclined surface of the first wedge block is matched with the inclined surface of the second wedge block. Through the structure, the vibration force applied to the drill bit is damped, and the impact resistance of the screw drilling tool is improved.

Description

Impact-resistant screw drilling tool

Technical Field

The invention relates to the technical field of drilling equipment, in particular to an impact-resistant screw drill.

Background

Drilling tool and drill bit are under big brill pressure in the well drilling, and under the condition of big torque of drilling tool output, especially the teeth of a cogwheel constantly crushed the rock and creeps into, just produced vibrations and impact in the moment that the carbon stone receives pressure breakage, often the outstanding that shows in gravel layer or hardness are big and have firm relatively poor bottom, even appear jumping the brill phenomenon, if appear jumping the brill and can produce the resonance effect, can make the drilling tool jump together, it is very big to drilling tool destructive power.

Disclosure of Invention

The invention aims to provide an impact-resistant screw drill which can reduce or eliminate jump drilling and impact vibration during drilling in a jump drilling bottom layer and reduce damage of the screw drill.

In order to achieve the purpose, the impact-resistant screw drilling tool comprises an outer shell, a rotating shaft, a buffer sleeve, a connecting joint and a first buffer assembly, wherein the rotating shaft is rotatably installed in the outer shell, the lower end of the rotating shaft extends out of the outer shell, the buffer sleeve and the connecting joint are sleeved at the lower end part of the rotating shaft, and a mounting hole for mounting a drill bit is formed in the lower end part of the connecting joint;

the lateral wall of axis of rotation is provided with the side slot and is located the sliding tray of the interior bottom of side slot, first buffering subassembly includes first wedge, slider, second wedge and first spring, the slider slide set up in the sliding tray, the bottom of first wedge with slider fixed connection, the second wedge with attach fitting fixed connection, the one end of first spring with the lateral wall fixed connection of sliding tray, the other end of first spring with first wedge fixed connection, just the inclined plane of first wedge with the mutual adaptation in inclined plane of second wedge.

Through the axis of rotation rotates, drives attach fitting rotates to drive the drill bit and bore, realize the probing, when the drill bit receives impact force or atress vibrations at the probing in-process, the drill bit received to holding power this moment, and then supports and hold attach fitting follows the axial direction rebound of axis of rotation drives this moment the second wedge upwards takes place the displacement, because the inclined plane of first wedge with the inclined plane mutual adaptation of second wedge, along with the displacement that makes progress of second wedge and then support and hold first wedge, drive the slider is in remove in the sliding tray, simultaneously the compression behind the first spring atress to this realization plays the shock attenuation effect to the shaking force that the drill bit received, promotes the shock resistance of this screw rod drilling tool.

The lower end part of the buffer sleeve is provided with a first annular depressed part, the connecting joint comprises a joint body and an annular body, the joint body is sleeved at the lower end part of the rotating shaft, the annular body is fixedly connected with the upper end part of the joint body, and the annular body is in clearance fit with the first annular depressed part.

When the rotating shaft drives the joint body to rotate, the annular body can be driven to rotate circumferentially, and the buffer sleeve does not rotate while the joint body rotates due to the clearance fit between the annular body and the first annular concave part.

Wherein, the axis of rotation still has second annular depressed part, the cushion collar is including the cover body, annuliform and damper, the cover body cover is established the outside of axis of rotation, the annuliform cover is established the outside of axis of rotation, and with second annular depressed part clearance fit, just the annuliform with set fixed connection, the damper cover is established the outside of axis of rotation, and is located the top of annuliform.

When the joint body moves upwards along the axial line direction of the rotating shaft, the circular ring slides upwards on the second annular concave part to further abut against the damping piece, and the damping piece is utilized to realize the impact-resistant damping effect, so that the impact resistance of the screw drilling tool is improved.

The shock absorption piece comprises a second spring and an adaptive ring, one end of the second spring is fixedly connected with the circular ring, the other end of the second spring is fixedly connected with the lower end face of the adaptive ring, and the upper end face of the adaptive ring is rotatably connected with the inner top wall of the second annular concave part.

The circular ring slides upwards on the second annular concave part to further abut against the damping piece, namely the second spring, the second spring is compressed after being stressed, and therefore the damping effect is achieved.

The anti-impact screw drilling tool further comprises two telescopic rods, the two telescopic rods are symmetrically arranged along the axial center line of the rotating shaft, and two ends of each telescopic rod are fixedly connected with the outer shell and the connecting joint respectively.

The telescopic rod can increase the connection stability between the outer shell and the connection joint.

The telescopic rod comprises a sleeve and an inner rod, the inner rod is connected with the sleeve in a sliding mode and is located inside the sleeve, one end of the inner rod is fixedly connected with the outer shell, and the sleeve is fixedly connected with the connecting joint.

The inner rod slides inside the sleeve, so that the telescopic rod can stretch out and draw back.

According to the impact-resistant screw drilling tool, if the drill bit is subjected to impact force or stress vibration in the drilling process, the drill bit is subjected to abutting force at the moment, the connecting joint is abutted to move upwards along the axial line direction of the rotating shaft, the second wedge block is driven to displace upwards at the moment, and due to the fact that the inclined surface of the first wedge block is matched with the inclined surface of the second wedge block, the first wedge block is abutted to the second wedge block along with the upward displacement of the second wedge block, the sliding block is driven to move in the sliding groove, and meanwhile the first spring is compressed after being stressed, the vibration force applied to the drill bit is reduced, and the impact resistance of the screw drilling tool is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the structure of an impact resistant screw drill of the present invention.

FIG. 2 is a front view of the impact resistant screw drill of the present invention.

Fig. 3 is a cross-sectional view of the a-a line structure of fig. 2 of the present invention.

Fig. 4 is an enlarged view of a portion of the structure of fig. 3B according to the present invention.

Fig. 5 is an enlarged view of a portion of the structure of fig. 3C according to the present invention.

Fig. 6 is an enlarged view of a portion of the structure of fig. 3 according to the present invention.

1-an outer shell, 2-a rotating shaft, 3-a buffer sleeve, 4-a connecting joint, 5-a first buffer assembly, 6-an installation hole, 7-a side groove, 8-a sliding groove, 9-a first wedge block, 10-a sliding block, 11-a second wedge block, 12-a first spring, 13-a first annular concave part, 14-a joint body, 15-an annular body and 16-a second annular concave part, 17-sleeve body, 18-circular ring, 19-shock absorption piece, 20-second spring, 21-adapter ring, 22-telescopic rod, 23-sleeve, 24-inner rod, 25-transition hole, 26-disc body, 27-outer sleeve, 28-inner sleeve, 29-third spring, 30-fourth spring and 31-reinforcing rib.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 to 6, the invention provides an impact-resistant screw drill, which includes an outer casing 1, a rotating shaft 2, a buffer sleeve 3, a connection joint 4 and a first buffer assembly 5, wherein the rotating shaft 2 is rotatably mounted inside the outer casing 1, the lower end of the rotating shaft 2 extends out of the outer casing 1, the buffer sleeve 3 and the connection joint 4 are sleeved on the lower end of the rotating shaft 2, and the lower end of the connection joint 4 is provided with a mounting hole 6 for mounting a drill bit;

the lateral wall of axis of rotation 2 is provided with side slot 7 and is located the sliding tray 8 of the interior bottom of side slot 7, first buffer unit 5 includes first wedge 9, slider 10, second wedge 11 and first spring 12, slider 10 slide set up in the sliding tray 8, the bottom of first wedge 9 with slider 10 fixed connection, second wedge 11 with attach fitting 4 fixed connection, the one end of first spring 12 with the lateral wall fixed connection of sliding tray 8, the other end of first spring 12 with first wedge 9 fixed connection, just the inclined plane of first wedge 9 with the inclined plane mutual adaptation of second wedge 11.

In this embodiment, through axis of rotation 2 rotates, drives attach fitting 4 rotates to drive the drill bit and bore, realize the probing, when the drill bit receives impact force or atress vibrations at the probing in-process, the drill bit received to holding power this moment, and then held attach fitting 4 follows axis of rotation 2 direction rebound, drive this moment second wedge 11 upwards takes place the displacement, because the inclined plane of first wedge 9 with the inclined plane mutual adaptation of second wedge 11, along with the upwards displacement of second wedge 11 and then support and hold first wedge 9 drives slider 10 is in remove in the sliding tray 8, simultaneously first spring 12 receives the back compression, plays the shock attenuation effect with this realization to the shaking force that the drill bit received, promotes the shock resistance of this screw rod drilling tool.

Further, the lower end of the cushion collar 3 has a first annular recess 13, the connection joint 4 includes a joint body 14 and an annular body 15, the joint body 14 is sleeved on the lower end of the rotation shaft 2, the annular body 15 is fixedly connected with the upper end of the joint body 14, and the annular body 15 is in clearance fit with the first annular recess 13.

In this embodiment, when the rotating shaft 2 drives the joint body 14 to rotate, the annular body 15 can be driven to rotate circumferentially, and the annular body 15 is in clearance fit with the first annular recess 13, so that the cushion collar 3 does not rotate while the joint body 14 rotates.

Further, axis of rotation 2 still has second annular depressed part 16, cushion collar 3 is including the cover body 17, annularity 18 and damper 19, the cover body 17 cover is established the outside of axis of rotation 2, annularity 18 cover is established the outside of axis of rotation 2, and with 16 clearance fit of second annular depressed part, just annularity 18 with cover body 17 fixed connection, damper 19 cover is established the outside of axis of rotation 2, and is located the top of annularity 18. The shock absorbing member 19 comprises a second spring 20 and an adapting ring 21, one end of the second spring 20 is fixedly connected with the circular ring 18, the other end of the second spring 20 is fixedly connected with the lower end face of the adapting ring 21, and the upper end face of the adapting ring 21 is rotatably connected with the inner top wall of the second annular recess 16.

In the present embodiment, when the joint body 14 moves upward along the axial line direction of the rotating shaft 2, the circular ring 18 slides upward on the second annular recess 16, and further abuts against the damper 19, that is, the second spring 20, and the second spring 20 is compressed after being forced, thereby achieving a damping effect, and the installation of the adapter ring 21 enables the second spring 20 not to rotate along with the rotating shaft 2. Therefore, the shock absorbing member 19 is used to achieve shock absorbing effect, thereby improving the shock resistance of the screw drill.

Further, the impact-resistant screw drilling tool further comprises two telescopic rods 22, the two telescopic rods 22 are symmetrically arranged along the axial center line of the rotating shaft 2, and two ends of each telescopic rod 22 are fixedly connected with the outer shell 1 and the connecting joint 4 respectively. The telescopic rod 22 comprises a sleeve 23 and an inner rod 24, the inner rod 24 is connected with the sleeve 23 in a sliding mode and is located inside the sleeve 23, one end of the inner rod 24 is fixedly connected with the outer shell 1, and the sleeve 23 is fixedly connected with the connecting joint 4.

In the present embodiment, the extension and contraction of the telescopic rod 22 are realized by sliding the inner rod 24 inside the sleeve 23, and the arrangement of the telescopic rod 22 can increase the connection stability between the outer housing 1 and the connection joint 4.

Further, the connection joint 4 further has a transition hole 25, a second buffer assembly is disposed in the transition hole 25, the second buffer assembly includes a disc 26, an outer sleeve 27, an inner sleeve 28 and a third spring 29, the disc 26 is rotatably connected to the rotating shaft 2, one end of the inner sleeve 28 is fixedly connected to the disc 26, the other end of the inner sleeve 28 is slidably connected to one end of the outer sleeve 27, the outer sleeve 27 is sleeved on the outer portion of the inner sleeve 28, the other end of the outer sleeve 27 is fixedly connected to the inner bottom of the transition hole 25, and the third spring 29 is disposed inside the outer sleeve 27. The second buffer assembly further comprises a fourth spring 30, and two ends of the fourth spring 30 are respectively and fixedly connected with the tray body 26 and the inner bottom of the transition hole 25, and are sleeved outside the outer sleeve 27 and the inner sleeve 28.

In the present embodiment, when the drill bit is subjected to an impact force or a forced vibration during the drilling process, the drill bit is subjected to a holding force, the outer portion of the inner sleeve 28 is contracted into the inner portion of the outer sleeve 27 to hold the third spring 29, and the third spring 29 is compressed after being stressed, so that the shock absorption effect is achieved, and the impact resistance of the screw drill is improved. While the outer part of the inner sleeve 28 is contracted to the inside of the outer sleeve 27, the fourth spring 30 is compressed after being stressed, and the impact resistance of the screw drill is further improved.

Further, the anti-impact screw drilling tool further comprises a plurality of reinforcing ribs 31, and the plurality of reinforcing ribs 31 are fixedly connected with the outer shell 1 and uniformly distributed outside the outer shell 1.

In the present embodiment, the provision of the plurality of ribs 31 can increase the structural strength of the outer case 1.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (6)

1. An impact-resistant screw drill is characterized in that,

the drill bit assembly comprises an outer shell, a rotating shaft, a buffer sleeve, a connecting joint and a first buffer assembly, wherein the rotating shaft is rotatably arranged in the outer shell, the lower end of the rotating shaft extends out of the outer shell, the buffer sleeve and the connecting joint are sleeved at the lower end of the rotating shaft, and a mounting hole for mounting a drill bit is formed in the lower end of the connecting joint;

the lateral wall of axis of rotation is provided with the side slot and is located the sliding tray of the interior bottom of side slot, first buffering subassembly includes first wedge, slider, second wedge and first spring, the slider slide set up in the sliding tray, the bottom of first wedge with slider fixed connection, the second wedge with attach fitting fixed connection, the one end of first spring with the lateral wall fixed connection of sliding tray, the other end of first spring with first wedge fixed connection, just the inclined plane of first wedge with the mutual adaptation in inclined plane of second wedge.

2. An impact resistant screw drill as defined in claim 1,

the lower tip of cushion collar has first annular depressed part, attach fitting is including connecting body and ring body, connect the body suit in the lower tip of axis of rotation, the ring body with the upper end fixed connection who connects the body, just the ring body with first annular depressed part clearance fit.

3. An impact resistant screw drill as defined in claim 2,

the axis of rotation still has second annular depressed part, the cushion collar is including the cover body, annuliform and damper, the cover body cover is established the outside of axis of rotation, the annuliform cover is established the outside of axis of rotation, and with second annular depressed part clearance fit, just the annuliform with set fixed connection, the damper cover is established the outside of axis of rotation, and is located the top of annuliform.

4. An impact resistant screw drill as defined in claim 3,

the shock attenuation piece includes second spring and adaptation ring, the one end of second spring with ring fixed connection, the other end of second spring with the lower terminal surface fixed connection of adaptation ring, the up end of adaptation ring with the interior roof of second annular depressed part rotates and is connected.

5. An impact resistant screw drill as defined in claim 4,

the impact-resistant screw drilling tool further comprises two telescopic rods, the two telescopic rods are symmetrically arranged along the axial center line of the rotating shaft, and two ends of each telescopic rod are fixedly connected with the outer shell and the connecting joint respectively.

6. An impact resistant screw drill as defined in claim 5,

the telescopic rod comprises a sleeve and an inner rod, the inner rod is connected with the sleeve in a sliding mode and is located inside the sleeve, one end of the inner rod is fixedly connected with the outer shell, and the sleeve is fixedly connected with the connecting joint.

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