Sand-preventing and anti-blocking screw drill
By introducing a filter screen and a slanted groove structure into the screw drill bit, the problem of reduced mud velocity is solved, achieving efficient sand control and filter screen protection, thus ensuring the drill bit's rotational speed and working efficiency.
Patent Information
- Application Number
- CN202520627595.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-04-07
AI Technical Summary
In existing screw drills, after filtering the mud, the speed at which the mud enters the hydraulic motor decreases, resulting in a reduction in drill bit rotation speed and affecting the drill bit's working efficiency.
A sand-proof and anti-clogging screw drill bit is designed, which adopts a filter screen and inclined groove structure. The filter screen filters particulate impurities in the mud, and the inclined groove guides the mud from the large channel to the small channel, increasing the speed at which the mud enters the motor assembly. At the same time, a rubber damping sleeve is set on the inner wall of the collecting sleeve to reduce noise, and a buffer plate is set in the fixed shell to reduce the impact force on the filter screen.
It effectively prevents particulate matter from entering the motor assembly, improves the sand control effect of the drill bit, ensures that the mud enters the motor at a high speed, reduces noise and extends the service life of the filter screen, and ensures the speed and working efficiency of the drill bit.
Smart Images
Figure CN223739301U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to screw drill tool technical field especially relates to a sandproof and anti -blocking screw drill tool. BACKGROUND
[0002] At present, the screw drill tool used in the operation such as plug drilling, milling and lateral drilling for oil well is mainly composed of a hydraulic motor, a universal joint assembly, a transmission assembly and a bypass valve, when the mud pumped by the mud pump flows through the bypass valve into the motor, a certain pressure difference is formed at the inlet and outlet of the motor, the rotor is rotated around the axis of the stator, and the rotating speed and torque are transmitted to the drill bit through the universal shaft and the transmission shaft.
[0003] The mud liquid enters the bypass valve when the existing screw drill tool works, the mud liquid in the bypass valve enters the hydraulic motor, the particles in the mud liquid cause abrasion in the hydraulic motor, which reduces the service life of the hydraulic motor, in order to reduce the abrasion of the particles to the hydraulic motor, a filter screen is arranged on the bypass valve to achieve the sandproof and anti-blocking effect, and the particles are prevented from entering the hydraulic motor, after the mud liquid is filtered through the filter screen, the speed of the mud liquid entering the hydraulic motor is reduced, thereby reducing the rotating speed of the drill bit. UTILITY MODEL CONTENTS
[0004] The utility model discloses a sandproof and anti-blocking screw drill tool, which can prevent the particles in the mud liquid from entering the hydraulic motor, and can ensure that the mud liquid enters the hydraulic motor at a high speed after being filtered through the filter screen, thereby ensuring the rotating speed of the drill bit.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0006] The utility model discloses a sandproof and anti-blocking screw drill tool, which can prevent the particles in the mud liquid from entering the hydraulic motor, and can ensure that the mud liquid enters the hydraulic motor at a high speed after being filtered through the filter screen, thereby ensuring the rotating speed of the drill bit.
[0007] Preferably, the inner wall of the guide piece is sprayed with an anti-abrasion layer, and the anti-abrasion layer is a ceramic wear-resistant coating layer.
[0008] Preferably, a groove is formed in the inner wall of the gathering sleeve, and a rubber damping sleeve is connected to the groove, and one side of the rubber damping sleeve is in contact with the guide piece.
[0009] Preferably, the inner ring radius of the rubber damping sleeve is same as the inner ring radius of the gathering sleeve, the rubber damping sleeve is provided with a connecting protrusion, the groove is provided with a limiting groove, and the connecting protrusion is matched with the limiting groove.
[0010] Preferably, the fixing shell is fixedly connected with a circular ring frame, a first inclined surface is arranged on the inner wall of one end of the circular ring frame, and a second inclined surface is arranged on the inner wall of the other end of the circular ring frame.
[0011] Preferably, the first inclined surface is arranged to be inclined downward towards the filter screen, and the second inclined surface is arranged to be inclined downward towards the one-way valve.
[0012] Preferably, the inner wall of the circular ring frame is fixedly connected with connecting rods on both sides, and a buffer plate is fixedly connected between the two connecting rods, and the axis of the buffer plate is on the same straight line as the axis of the one-way valve.
[0013] Preferably, a through hole is arranged on the buffer plate, and the radius of the through hole near one end of the filter screen is greater than the radius of the other end.
[0014] The anti-sand and anti-blocking screw drill has the advantages that:
[0015] After the particles in the mud are filtered by the filter screen, the particles are prevented from entering the motor assembly, the sand prevention effect of the screw drill is improved, the inner ring radius of the inclined slot is greater than the inner ring radius of the gathering sleeve, the mud liquid enters the small channel from the large channel in the process of entering the gathering sleeve, the speed of the mud liquid entering the guide piece is improved, and the filtered mud is ensured to enter the motor assembly at a certain speed. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 The utility model provides a kind of structure diagram of anti-sand and anti-blocking screw drill Figure 1 ;
[0017] Figure 2 The utility model provides a kind of structure diagram of anti-sand and anti-blocking screw drill Figure 2 ;
[0018] Figure 3 The utility model provides a kind of structure diagram of anti-sand and anti-blocking screw drill
[0019] Figure 4 The Figure 3 local enlarged structure diagram of upper A place
[0020] Figure 5 The utility model provides a kind of structure diagram of connecting rod and buffer plate connection in anti-sand and anti-blocking screw drill.
[0021] In the figure: 1, bypass valve assembly housing; 2, motor assembly; 3, guide; 4, fixed shell; 5, check valve; 6, mounting groove; 7, filter screen; 8, gathering sleeve; 9, groove; 10, rubber damping sleeve; 11, circular ring frame; 12, first inclined surface; 13, second inclined surface; 14, connecting rod; 15, buffer plate; 16, through hole; 17, inclined slot. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.
[0023] Embodiment 1: refer to Figures 1-4 A sand and block prevention screw drill includes a bypass valve assembly housing 1, the bypass valve assembly housing 1 is communicated with a motor assembly 2 at one end, the bypass valve assembly housing 1 is connected with a guide 3, the inner wall of the guide 3 is sprayed with an anti-abrasion layer, the anti-abrasion layer protects the inner wall of the guide 3 from abrasion, the anti-abrasion layer is a ceramic wear-resistant coating layer, the other end of the bypass valve assembly housing 1 is communicated with a fixed shell 4, a mounting groove 6 is arranged between the bypass valve assembly housing 1 and the fixed shell 4, the mounting groove 6 is connected with a filter screen 7, one end of the fixed shell 4 is communicated with a check valve 5, the bypass valve assembly housing 1 is connected with a gathering sleeve 8, the gathering sleeve 8 is located between the guide 3 and the filter screen 7, one end of the gathering sleeve 8 is provided with an inclined slot 17, and the inclined slot 17 and the filter screen 7 are located on the same side.
[0024] Working process:
[0025] The mud liquid is introduced into the fixed shell 4 in one direction through the check valve 5, the mud liquid in the fixed shell 4 contacts the filter screen 7, the filter screen 7 filters the particles in the mud, the filtered mud liquid contacts the inclined slot 17, the inclined slot 17 guides the mud liquid into the gathering sleeve 8, and the mud liquid in the gathering sleeve 8 is guided into the motor assembly 2 through the guide 3.
[0026] After the filter screen 7 filters the particles in the mud, the particles are prevented from entering the motor assembly 2, and the sand prevention effect of the screw drill is improved, since the inner ring radius of the inclined slot 17 is greater than the inner ring radius of the gathering sleeve 8, the mud liquid enters the small channel from the large channel in the process of entering the gathering sleeve 8, so that the speed of the mud liquid entering the guide 3 is improved, and then the filtered mud enters the motor assembly 2 at a certain speed.
[0027] In embodiment 1, the mud liquid rubs against the inner wall of the gathering sleeve 8 during the flow in the gathering sleeve 8, and a large noise is generated, refer to Figures 3-4As another preferred embodiment of the utility model, the difference from the embodiment 1 is that the inner wall of the gathering sleeve 8 is provided with a groove 9, the groove 9 is connected with a rubber damping sleeve 10, one side of the rubber damping sleeve 10 is in contact with the guide 3, the inner ring radius of the rubber damping sleeve 10 is same with the inner ring radius of the gathering sleeve 8, the rubber damping sleeve 10 is connected with a convex, the groove 9 is provided with a limiting groove, the convex is matched with the limiting groove, the fixing effect of the rubber damping sleeve 10 is improved under the cooperation of the convex and the limiting groove, when the mud liquid enters the inside of the gathering sleeve 8, the inner wall of the gathering sleeve 8 is protected by the rubber damping sleeve 10, thereby reducing the noise volume generated in the process that the mud liquid passes through the gathering sleeve 8.
[0028] In the embodiment 1, the mud liquid enters the fixed shell 4 through the one-way valve 5, the mud liquid in the fixed shell 4 impacts the filter screen 7, thereby easily leading to the damage of the filter screen 7, reducing the service life of the filter screen 7, referring to Figures 3-5 As another preferred embodiment of the utility model, the difference from the embodiment 2 is that the fixed shell 4 is fixedly connected with a circular ring frame 11, the one end inner wall of the circular ring frame 11 is provided with a first inclined surface 12, the other end inner wall of the circular ring frame 11 is provided with a second inclined surface 13, the first inclined surface 12 is inclined downward to the direction of the filter screen 7, the second inclined surface 13 is inclined downward to the direction of the one-way valve 5, the inner wall of the circular ring frame 11 is fixedly connected with a connecting rod 14 on both sides, the two connecting rods 14 are fixedly connected with a buffer plate 15, the axis of the buffer plate 15 is on the same straight line with the axis of the one-way valve 5, the buffer plate 15 is provided with a through hole 16, the radius of the one end of the through hole 16 close to the filter screen 7 is greater than the radius of the other end;
[0029] The connecting rod 14 fixes the buffer plate 15, the mud liquid falling in the fixed shell 4 falls on the first inclined surface 12, the mud liquid on the first inclined surface 12 falls on the second inclined surface 13, the second inclined surface 13 buffers the mud liquid, at the same time, the buffer plate 15 contacts with the mud liquid, the buffer plate 15 buffers the mud liquid in the circular ring frame 11, after the mud liquid contacts with the buffer plate 15, the mud liquid passes through the through hole 16, because the radius of the one end of the through hole 16 close to the filter screen 7 is greater than the radius of the other end, the mud liquid passing through the through hole 16 disperses, thereby reducing the impact force received by the filter screen 7, making the filter screen 7 not easy to be damaged, improving the service life of the filter screen 7.
[0030] The above is only the preferred specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art in the technical range disclosed by the utility model, according to the technical scheme and the utility model concept of the utility model, carries out equivalent replacement or change, should be covered in the protection scope of the utility model.
Claims
1. A sand and plug prevention screw drill, comprising a bypass valve assembly shell (1), one end of the bypass valve assembly shell (1) is communicated with a motor assembly (2), a guide (3) is connected in the bypass valve assembly shell (1), characterized in that, Wherein: The other end of the bypass valve assembly housing (1) is communicated with a fixed shell (4), the bypass valve assembly housing (1) and the fixed shell (4) are provided with a mounting groove (6), the mounting groove (6) is connected with a filter screen (7), one end of the fixed shell (4) is communicated with a one-way valve (5), the bypass valve assembly housing (1) is connected with an accumulation sleeve (8), the accumulation sleeve (8) is located between the guide (3) and the filter screen (7), one end of the accumulation sleeve (8) is provided with an inclined slot (17), the inclined slot (17) is located on the same side of the filter screen (7).
2. The sand and plug prevention screw-in drill tool according to claim 1, characterized in that, The inner wall of the guide (3) is sprayed with an anti-wear layer, which is a ceramic wear-resistant coating layer.
3. The sand and plug prevention screw-in drill string of claim 1, wherein, The inner wall of the accumulation sleeve (8) is provided with a groove (9), the groove (9) is connected with a rubber damping sleeve (10), one side of the rubber damping sleeve (10) is in contact with the guide (3).
4. The sand and plug prevention screw-in drill tool of claim 3, wherein, The inner ring radius of the rubber damping sleeve (10) is the same as the inner ring radius of the accumulation sleeve (8), the rubber damping sleeve (10) is connected with a protrusion, the groove (9) is provided with a limiting groove, the protrusion is matched with the limiting groove.
5. The sand and plug prevention screw-in motor stinger of claim 1, wherein, The fixed shell (4) is fixedly connected with a circular ring frame (11), one end of the inner wall of the circular ring frame (11) is provided with a first inclined surface (12), the other end of the inner wall of the circular ring frame (11) is provided with a second inclined surface (13).
6. The sand and plug prevention screw-in drill tool of claim 5, wherein, The first inclined surface (12) is inclined downward to the direction of the filter screen (7), and the second inclined surface (13) is inclined downward to the direction of the one-way valve (5).
7. The sand and plug prevention screw-in drill string of claim 6, wherein, The inner wall of the circular ring frame (11) is fixedly connected with a connecting rod (14) on both sides, the connecting rod (14) is fixedly connected with a buffer plate (15) between the two connecting rods (14), the axis of the buffer plate (15) is on the same straight line with the axis of the one-way valve (5).
8. The sand and plug prevention screw-in drill string of claim 7, wherein, The buffer plate (15) is provided with a through hole (16), the radius of one end of the through hole (16) near the filter screen (7) is greater than the radius of the other end.