Dual power downhole tools

Abstract

The utility model relates to the field of dual-power downhole drilling tools, specifically a dual-power downhole tool, comprising: a drill string, one end of the drill string is fixedly installed with a connecting seat, the drill string is installed with a deflection short section through the connecting seat, and the end of the deflection short section away from the connecting seat is provided with a guide drill bit; during the drilling process, the front end of the deflection short section drives the guide drill bit to tilt to one side, keeps the deflection short section and the well wall horizontally stationary, and then drives one side of the guide drill bit to tilt toward the well wall, increases the single-sided cutting ability of the guide drill bit, and further achieves the deflection effect, and by utilizing the setting of the deflection component, the electric push rod utilizes the connection between the rotating shaft seat and the guide shaft to drive the guide shaft to deflect toward one side, and then drives the deflection connecting shaft and the deflection short section to bend synchronously, so that the deflection short section tilts toward one side of the well wall, which plays a role in being able to guide the inclination angle of the drill bit during drilling, improves the deflection efficiency of the guide drill bit, and achieves the advantages of stable inclination drilling.

Description

Technical Field

[0001] The utility model relates to the field of dual-power downhole drilling tools, in particular to a dual-power downhole tool. Background Art

[0002] At present, the downhole power device (or screw drill) in the prior art uses a drill bit installed on the head of the drill pipe to perform rock breaking drilling. The rotational power of the drill bit is provided by a screw motor, that is, a rotor connected to the drill pipe and a stator shell form a spiral channel, and the mucus will force the rotor to rotate when passing through the spiral channel; At present, during the drilling process of the drill bit, the conventional drill tool combination has a low inclination rate, and it is more difficult to operate in wells with a small displacement before the target, resulting in a slow mechanical drilling speed.

[0003] Therefore, a dual-power downhole tool is proposed to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a dual-power downhole tool in order to solve the above problems, thereby improving the problem that the conventional drilling tool combination has a low inclination rate, is difficult to operate in wells with a small displacement before the target, and leads to a slow mechanical drilling speed.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions. The dual-power downhole tool includes:

[0006] A drill string, one end of which is fixedly mounted with a connection seat, a deflection sub is mounted on the drill string through the connection seat, and a guide drill bit is arranged at one end of the deflection sub away from the connection seat;

[0007] A deflection mechanism, which is installed inside the deflection short section and can increase the deflection rate;

[0008] Among them, the deflection mechanism includes a deflection connecting shaft installed inside the deflection short section, a universal coupling is fixedly installed on one end of the deflection connecting shaft, the end of the universal coupling away from the deflection connecting shaft is fixedly connected to the deflection short section, the other end of the deflection connecting shaft is connected to the guide drill bit, and the surface of the deflection connecting shaft is provided with a deflection component, and the deflection component is used to increase the deflection rate.

[0009] Preferably, the deflection assembly includes a guide shaft sleeved on the surface of the deflection connecting shaft, the outer wall of the guide shaft is fixedly connected to the inner wall of the deflection short section, electric push rods are arranged inside the deflection short section and on both sides of the guide shaft, and rotating shaft seats are installed at both ends of the electric push rods, the fixed end of the electric push rod is connected to the inner wall of the deflection short section through the rotating shaft seat, and the telescopic end of the electric push rod is connected to the guide shaft through the rotating shaft seat.

[0010] Preferably, a self-aligning bearing is sleeved on the surface of the deflecting connecting shaft, and the outer side wall of the self-aligning bearing is fixedly connected to the inner side wall of the deflecting short section.

[0011] Preferably, a self-aligning ball is fixedly mounted on one side of the surface of the deflecting connecting shaft, a ball cage is rotatably mounted on the surface of the self-aligning ball, and a side of the ball cage away from the self-aligning ball is fixedly connected to the inner wall of the deflecting short section.

[0012] Preferably, a plurality of locking members are installed through the surface of the connection seat, and the connection seat and the deflection short section are connected via the locking members.

[0013] Preferably, the distance that the center point of the self-aligning bearing deviates from the axis of the drill string is equal to the maximum offset distance of the guide shaft.

[0014] Preferably, the self-aligning bearing is composed of an outer ring, an inner ring, rolling elements and a cage, wherein the cage is used to keep the rolling elements in a correct position inside the bearing.

[0015] The beneficial effects of the utility model are:

[0016] 1. During the drilling process, the front end of the deflection sub drives the guide drill bit to tilt to one side, keeping the deflection sub and the well wall horizontally stationary, thereby driving one side of the guide drill bit to tilt toward the well wall, increasing the single-sided cutting ability of the guide drill bit, and further achieving the deflection effect. In addition, by using the setting of the deflection assembly, the electric push rod drives the guide shaft to deflect to one side by using the connection between the rotating shaft seat and the guide shaft, thereby driving the deflection connecting shaft and the deflection sub to bend synchronously, so that the deflection sub tilts toward one side of the well wall, which plays a role in adjusting the inclination angle of the guide drill bit during drilling, improving the deflection efficiency of the guide drill bit, and achieving the advantage of stable inclination drilling.

[0017] 2. During the movement of the deflection connecting shaft, the self-aligning bearing, ball cage and self-aligning ball can be used to stably support the deflection connecting shaft, and at the same time, the stability of the deflection connecting shaft can be increased while ensuring the inclination adjustment of the deflection connecting shaft, so as to avoid the shaking of the deflection connecting shaft when adjusting the inclination direction, which affects the drilling of the guide drill bit. Then, by using the setting of the universal coupling, the universal adjustment of the universal coupling can be used to transmit power to the guide drill bit, so as to maintain the advantage of the guide drill bit in stable inclination drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the deflection short section of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the deflection assembly of the utility model;

[0021] Figure 4 The utility model is a schematic diagram of the connection structure between the ball cage and the self-aligning ball.

[0022] In the figure: 10, drill string; 11, deflection short section; 12, connecting seat; 13, guide drill bit; 20, deflection mechanism; 21, deflection connecting shaft; 22, universal coupling; 23, deflection assembly; 231, guide shaft; 232, electric push rod; 233, rotating shaft seat; 234, self-aligning bearing; 235, ball cage; 236, self-aligning ball. DETAILED DESCRIPTION

[0023] 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.

[0024] When implementing: Figure 1-4 As shown, the dual-power downhole tool comprises:

[0025] A drill string 10, one end of which is fixedly mounted with a connection seat 12, a deflection sub 11 is mounted on the drill string 10 through the connection seat 12, and a guide drill bit 13 is arranged at one end of the deflection sub 11 away from the connection seat 12;

[0026] The deflection mechanism 20 is installed inside the deflection short section 11 and can increase the deflection rate;

[0027] The deflection mechanism 20 includes a deflection connecting shaft 21 installed inside the deflection short section 11, a universal coupling 22 is fixedly installed at one end of the deflection connecting shaft 21, an end of the universal coupling 22 away from the deflection connecting shaft 21 is fixedly connected to the deflection short section 11, and the other end of the deflection connecting shaft 21 is connected to the guide drill bit 13. A deflection component 23 is sleeved on the surface of the deflection connecting shaft 21, and the deflection component 23 is used to increase the deflection rate;

[0028] In this embodiment, a plurality of locking parts are installed through the surface of the connecting seat 12, and the connecting seat 12 and the deflection short section 11 are connected through the locking parts; it is convenient to connect and lock the drill string 10 and the deflection short section 11 to avoid loosening of the two during the drilling process, which affects the drilling stability.

[0029] like Figure 2 and Figure 4As shown, the deflection assembly 23 includes a guide shaft 231 sleeved on the surface of the deflection connection shaft 21, the outer wall of the guide shaft 231 is fixedly connected to the inner wall of the deflection short section 11, and electric push rods 232 are arranged inside the deflection short section 11 and on both sides of the guide shaft 231, and both ends of the electric push rods 232 are installed with rotating shaft seats 233, the fixed end of the electric push rod 232 is connected to the inner wall of the deflection short section 11 through the rotating shaft seat 233, and the telescopic end of the electric push rod 232 is connected to the guide shaft 231 through the rotating shaft seat 233;

[0030] In this embodiment, the front end of the deflection short section 11 drives the guide drill bit 13 to tilt to one side, keeps the deflection short section 11 and the well wall horizontally stationary, and then drives one side of the guide drill bit 13 to tilt toward the well wall, thereby increasing the single-sided cutting ability of the guide drill bit 13 and further achieving the deflection effect. In addition, by utilizing the setting of the deflection component 23, the electric push rod 232 drives the guide shaft 231 to deflect toward one side by utilizing the connection between the rotating shaft seat 233 and the guide shaft 231, thereby driving the deflection connecting shaft 21 and the deflection short section 11 to bend synchronously, so that the deflection short section 11 tilts toward one side of the well wall; the distance from the center point of the self-aligning bearing 234 to the axis of the drill string 10 is equal to the maximum offset distance of the guide shaft 231.

[0031] like Figure 2 , Figure 3 and Figure 4 As shown, a self-aligning bearing 234 is sleeved on the surface of the deflection connecting shaft 21, and the outer wall of the self-aligning bearing 234 is fixedly connected to the inner wall of the deflection short section 11; a self-aligning ball 236 is fixedly installed on one side of the surface of the deflection connecting shaft 21, and a ball cage 235 is rotatably installed on the surface of the self-aligning ball 236, and the side of the ball cage 235 away from the self-aligning ball 236 is fixedly connected to the inner wall of the deflection short section 11;

[0032] In this embodiment, the arrangement of the self-aligning bearing 234, the ball cage 235 and the self-aligning ball 236 can stably support the deflection connection shaft 21, and increase the stability of the deflection connection shaft 21 while ensuring the inclination adjustment of the deflection connection shaft 21, thereby preventing the deflection connection shaft 21 from shaking when adjusting the inclination direction;

[0033] In this embodiment, the self-aligning bearing 234 is composed of an outer ring, an inner ring, rolling elements and a retaining cage, wherein the retaining cage is used to keep the rolling elements in the correct position inside the bearing; the above-mentioned self-aligning bearing 234 only serves as a rotation support in this application, and the application of the self-aligning bearing 234 in the prior art is relatively mature, so no further details will be given here.

[0034] During the drilling process of the utility model, the front end of the deflection short section 11 drives the guide drill bit 13 to tilt to one side, keeps the deflection short section 11 and the well wall horizontally stationary, and then drives one side of the guide drill bit 13 to tilt toward the well wall, thereby increasing the single-sided cutting ability of the guide drill bit 13 and further achieving the deflection effect. In addition, by utilizing the setting of the deflection component 23, the electric push rod 232 drives the guide shaft 231 to deflect toward one side by utilizing the connection between the rotating shaft seat 233 and the guide shaft 231, thereby driving the deflection connecting shaft 21 and the deflection short section 11 to bend synchronously, so that the deflection short section 11 tilts toward one side of the well wall. In addition, during the movement of the deflection connecting shaft 21, the setting of the self-aligning bearing 234, the ball cage 235 and the self-aligning ball 236 can be used to stably support the deflection connecting shaft 21, and increase the stability of the deflection connecting shaft 21 while ensuring the inclination adjustment of the deflection connecting shaft 21.

[0035] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Dual-power downhole tool, characterized in that: include: A drill string (10), wherein a connection seat (12) is fixedly mounted on one end of the drill string (10), a deflection sub (11) is mounted on the drill string (10) via the connection seat (12), and a guide drill bit (13) is disposed on one end of the deflection sub (11) away from the connection seat (12); A deflection mechanism (20), wherein the deflection mechanism (20) is installed inside the deflection short section (11) and can increase the deflection rate; Wherein, the deflection mechanism (20) includes a deflection connecting shaft (21) installed inside the deflection short section (11), one end of the deflection connecting shaft (21) is fixedly installed with a universal coupling (22), the end of the universal coupling (22) away from the deflection connecting shaft (21) is fixedly connected to the deflection short section (11), the other end of the deflection connecting shaft (21) is connected to the guide drill bit (13), and the surface of the deflection connecting shaft (21) is provided with a deflection component (23), and the deflection component (23) is used to increase the deflection rate.

2. The dual-power downhole tool according to claim 1, characterized in that: The deflection assembly (23) comprises a guide shaft (231) sleeved on the surface of the deflection connecting shaft (21); the outer wall of the guide shaft (231) is fixedly connected to the inner wall of the deflection short section (11); electric push rods (232) are arranged inside the deflection short section (11) and on both sides of the guide shaft (231); both ends of the electric push rods (232) are installed with rotating shaft seats (233); the fixed end of the electric push rod (232) is connected to the inner wall of the deflection short section (11) through the rotating shaft seat (233); the telescopic end of the electric push rod (232) is connected to the guide shaft (231) through the rotating shaft seat (233).

3. The dual-power downhole tool according to claim 2, characterized in that: A self-aligning bearing (234) is sleeved on the surface of the deflection connection shaft (21), and the outer side wall of the self-aligning bearing (234) is fixedly connected to the inner side wall of the deflection short section (11).

4. The dual-power downhole tool according to claim 2, characterized in that: A self-aligning ball (236) is fixedly mounted on one side of the surface of the deflection connection shaft (21), a ball cage (235) is rotatably mounted on the surface of the self-aligning ball (236), and a side of the ball cage (235) away from the self-aligning ball (236) is fixedly connected to the inner wall of the deflection short section (11).

5. The dual-power downhole tool according to claim 1, characterized in that: A plurality of locking pieces are installed through the surface of the connection seat (12), and the connection seat (12) and the deflection short section (11) are connected via the locking pieces.

6. The dual-power downhole tool according to claim 3, characterized in that: The distance from the center point of the self-aligning bearing (234) to the axis of the drill string (10) is equal to the maximum offset distance of the guide shaft (231).

7. The dual-power downhole tool according to claim 3, characterized in that: The self-aligning bearing (234) is composed of an outer ring, an inner ring, rolling elements and a retaining frame, wherein the retaining frame is used to keep the rolling elements in the correct position inside the bearing.

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