Hydraulic oscillator for petroleum and natural gas drilling

Abstract

The utility model discloses a hydraulic oscillator for oil and gas well drilling, which comprises a hydraulic oscillator body, the hydraulic oscillator body comprises a main body shell and a transmission shaft arranged in the main body shell, a piston pipe is fixedly sleeved on the transmission shaft, and a ball seat is arranged below the piston pipe. The ball seat is slidably sleeved with an installation sleeve fixedly installed in the main body shell, the same friction fixing mechanism is installed between the top of the outer side of the ball seat and the bottom of the piston pipe, the ball seat and the piston pipe are fixedly connected through the friction fixing mechanism, and a conical groove is formed in the top of the ball seat. Through the arrangement of a series of structures, the communicating hole can be stably plugged and the fixation of the piston pipe can be relieved in an electric driving operation mode, the situation that the fixation of the piston pipe cannot be relieved due to the fact that plugging is relieved due to liquid backflow and the liquid impact force is small can be effectively avoided, and the use stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oscillators, in particular to a hydraulic oscillator for oil and natural gas drilling. Background Art

[0002] The principle of the hydraulic oscillator is to drive the hydraulic motor to rotate through the drilling fluid, and then drive the valve to rotate, so that the valve can be opened and closed. The flow area of ​​the hydraulic oscillator changes periodically with the opening and closing of the valve. When the flow area is large, the liquid flows normally; when the flow area is small, a throttling difference is generated, and the pressure difference drives the hydraulic oscillator to extend, and the hydraulic oscillator compresses the disc spring when it extends; when the flow area becomes larger again, the pressure difference decreases, and the hydraulic oscillator is shortened to the initial length under the push of the disc spring, and the hydraulic oscillator performs periodic expansion and contraction high-frequency vibration; the current hydraulic oscillator is in the starting state during the process of drilling and circulating drilling fluid. The hydraulic oscillator not only consumes drilling pressure, but also affects the service life of the hydraulic oscillator, and this consumption is completely ineffective. For this reason, the application number is: 20232 1671843.5 discloses a switchable hydraulic oscillator for oil and gas drilling, comprising a main body and a transmission shaft, wherein a ferrule, a mounting sleeve, a connecting sleeve, a rotating shaft, a movable valve and a fixed valve are arranged in sequence in the main body, a piston is arranged in the ferrule, an elastic locking head is arranged at the lower end of the piston, a locking groove matched with the elastic locking head is arranged in the ferrule, and a ball seat is arranged between the ferrule and the mounting sleeve; a turbine and a thrust bearing are arranged on the rotating shaft in sequence, a first flow channel connected to each other is opened in the transmission shaft, the piston, the ball seat, the mounting sleeve, the connecting sleeve and the rotating shaft, a second flow channel connected to each other is opened between the mounting sleeve, the connecting sleeve, the rotating shaft and the inner side wall of the main body, and a reflux port is arranged on the rotating shaft between the turbine and the thrust bearing; a first eccentric hole and a second eccentric hole are respectively opened on the movable valve and the fixed valve, and the working principle is as follows: when the hydraulic oscillator is in When in the closed state, the ball seat is inserted into the elastic lock head, and the elastic lock head shrinks toward the ball seat, thereby gripping the ball seat. At this time, the elastic lock head is clamped in the lock groove, so that the piston is in a fixed state, and the liquid flows out from the first flow channel through the first eccentric hole and the second eccentric hole, and the hydraulic oscillator does not vibrate; when the movable valve does not rotate, the first eccentric hole and the second eccentric hole are in a connected state; when the hydraulic oscillator is required to work, a small ball is thrown into the first flow channel opening at the transmission shaft, and the small ball falls into the limit position in the first flow channel in the ball seat and is stuck, thereby blocking the first flow channel. When the liquid is continuously injected, a downward thrust is generated on the ball seat, thereby causing the ball seat to disengage from the elastic lock head, thereby causing the liquid to flow along the second flow channel. When the liquid flows to between the rotating shaft and the inner wall of the main body When the second flow channel is opened, the impact on the rotor of the turbine on the rotating shaft causes the turbine rotor to rotate and drives the rotating shaft to rotate, thereby driving the movable valve to rotate, so that the first eccentric hole and the second eccentric hole are periodically connected and closed; the liquid in the second flow channel flows back to the first flow channel through the reflux port, and the liquid in the first flow channel flows out periodically. At this time, the elastic lock head contracts toward the ball seat, so that the elastic lock head is separated from the lock groove, and the piston is in an active state. The first eccentric hole and the second eccentric hole are periodically connected and closed, so that the flow area changes periodically, so that the hydraulic oscillator generates periodic vibration; It solves the problem that the current hydraulic oscillator cannot be controlled to open separately, so that the hydraulic oscillator keeps working and consumes drilling pressure, reduces the service life, and is easy to cause well wall collapse;

[0003] The switchable hydraulic oscillator for oil and gas drilling disclosed in the above patent, when the hydraulic oscillator needs to work, the first flow channel is blocked by throwing a ball into the ball seat, and the piston is released by the squeezing force of the blocked liquid. The above method has the following shortcomings when used: 1. The stability is low by the method of blocking by throwing a ball, and there is a situation where the liquid backflows and the ball recoils upward, causing the first flow channel to be unblocked; 2. The method of using liquid impact to release the solid is still relatively low in stability. When the impact force of the liquid is small, it cannot achieve release and cannot meet the use requirements. Based on the above situation, we propose a hydraulic oscillator for oil and gas drilling. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a hydraulic vibrator for oil and gas drilling.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A hydraulic oscillator for oil and gas drilling includes a hydraulic oscillator body. The principle of the hydraulic oscillator body generating periodic vibrations is prior art and will not be elaborated on in detail herein. The hydraulic oscillator body includes a main body shell and a transmission shaft arranged in the main body shell. A piston tube is fixedly sleeved on the transmission shaft, a ball seat is arranged below the piston tube, a mounting sleeve is fixedly sleeved on the ball seat and installed in the main body shell. A friction fixing mechanism is installed between the outer top of the ball seat and the bottom of the piston tube. The fixed connection between the ball seat and the piston tube is achieved by the friction fixing mechanism. A conical groove is provided on the top of the ball seat, and a connecting hole is provided on the inner wall of the bottom of the conical groove. The connecting hole is connected to the piston tube through the conical groove. A sealing ball is provided in the conical groove. The conical groove is sealed by the sealing ball. and the connecting hole are sealed, the bottom of the sealing ball is fixedly connected with a vertical driving mechanism, the vertical driving mechanism is used to drive the sealing ball to move vertically, two extrusion blocks are fixedly connected to the inner walls on both sides of the connecting hole, the extrusion blocks cooperate with the vertical driving mechanism, and are used to drive the ball seat to move vertically, thin rods are fixedly connected to the inner walls on both sides of the mounting sleeve, the two thin rods are fixedly connected to the vertical driving mechanism, the top of the thin rods is fixedly connected with an elastic guiding mechanism, the ball seat is sleeved on the two elastic guiding mechanisms, the elastic guiding mechanism has a vertical guiding effect on the ball seat, the top of the thin rod is embedded with a waterproof pressure sensor that cooperates with the elastic guiding mechanism on the left side, the waterproof pressure sensor is used to detect the extrusion force of the elastic guiding mechanism, and the waterproof pressure sensor is electrically connected to the vertical driving mechanism.

[0007] Preferably, the friction fixing mechanism includes two fixing blocks, which are respectively fixedly connected to the top of both sides of the ball seat, and the top of the fixing block is fixedly connected with a plurality of pointed blocks. A hard rubber ring is embedded in the bottom of the piston tube, and the bottom of the hard rubber ring is in close contact with the top of the plurality of pointed blocks. Under the action of the friction force between the hard rubber ring and the pointed blocks, a fixed connection between the ball seat and the piston tube is achieved.

[0008] Preferably, the vertical driving mechanism includes a vertical rod fixedly connected to the bottom of the blocking ball, the bottom end of the vertical rod is fixedly connected to a moving rod, the moving rod is located between two opposite extrusion blocks above, a waterproof box is fixedly connected between the two thin rods, an electric telescopic rod is fixedly connected between the inner walls on both sides of the waterproof box, the waterproof box is used to waterproof the electric telescopic rod to prevent liquid from sticking to the electric telescopic rod, the top end of the output shaft of the electric telescopic rod extends into the connecting hole and is fixedly connected to the bottom of the moving rod, the electric telescopic rod is used to drive the moving rod to move vertically, the front side of the electric telescopic rod is fixedly connected to a controller, and the controller is electrically connected to the waterproof pressure sensor.

[0009] Preferably, the elastic guiding mechanism includes a guiding rod fixedly connected to the top of the thin rod, the ball seat is slidably sleeved on the two guiding rods, the guide rods have a vertical guiding effect on the ball seat, the bottom of the ball seat is fixedly connected to two springs, the springs are movably sleeved on the corresponding guide rods, the bottom end of the spring on the left is fixedly connected to the top of the waterproof pressure sensor, and the bottom end of the spring on the right is fixedly connected to the top of the corresponding thin rod, so that the telescopic characteristics of the spring can be used to provide the ball seat with a spatial distance for vertical movement.

[0010] Preferably, a battery is fixedly connected to the inner wall of the bottom of the waterproof box, and the battery is electrically connected to the controller, the electric telescopic rod and the waterproof pressure sensor, and the battery supplies power to the controller, the electric telescopic rod and the waterproof pressure sensor.

[0011] Preferably, the controller is built with a wireless remote control module, and the wireless remote control module is matched with an external remote control. The wireless remote control module and the external remote control cooperate with each other to remotely control the electric telescopic rod.

[0012] Preferably, guide grooves are provided on both sides of the bottom of the ball seat, and the inner walls of the guide grooves are slidably connected to the outer sides of the corresponding guide rods.

[0013] Compared with the existing technology, the beneficial effects of the utility model are:

[0014] 1. Through the cooperation of the blocking ball and the vertical driving mechanism, the connecting hole can be blocked by electric drive. The electric drive blocking method can effectively avoid the situation where the blockage is released due to liquid backflow;

[0015] 2. Through the cooperation of the extrusion block, the elastic guide mechanism and the vertical drive mechanism, after the connecting hole is blocked, the extrusion ball seat can be driven to move downward to release the fixation of the piston tube, so that the piston tube can move. This electric drive release method can effectively avoid the situation where the liquid impact force is small and the release cannot be caused, and improve the stability of use;

[0016] The utility model adopts a series of structural settings to stably seal the connecting hole and release the fixation of the piston tube by means of electric drive operation, which can effectively avoid the situation where the blockage is released due to liquid backflow and the piston tube cannot be released due to small liquid impact force, thereby improving the stability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a hydraulic oscillator for oil and gas drilling proposed by the utility model;

[0018] Figure 2 This is a partial cross-sectional structural diagram of a main body shell of a hydraulic vibrator for oil and gas drilling proposed by the utility model in a cut-away state;

[0019] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of part A;

[0020] Figure 4 for Figure 2 A schematic diagram of the enlarged structure of part B;

[0021] Figure 5 The utility model is a three-dimensional structural schematic diagram of a sealing ball, a vertical driving mechanism, an elastic guiding mechanism and a thin rod connecting piece of a hydraulic oscillator for oil and gas drilling.

[0022] In the figure: 100, main body shell; 101, transmission shaft; 102, piston tube; 103, ball seat; 104, mounting sleeve; 1, hard rubber ring; 2, fixing block; 3, pointed block; 4, blocking ball; 5, conical groove; 6, connecting hole; 7, vertical rod; 8, extrusion block; 9, moving rod; 10, battery; 11, thin rod; 12, electric telescopic rod; 13, guide rod; 14, spring; 15, waterproof pressure sensor; 16, waterproof box; 17, controller. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Reference Figure 1-5A hydraulic oscillator for oil and gas drilling includes a hydraulic oscillator body. The principle of the hydraulic oscillator body generating periodic vibrations is a prior art, which has been disclosed in a switchable hydraulic oscillator for oil and gas drilling disclosed in patent documents with application number 202321671843.5 and authorization announcement number CN220081318U. The specific description will not be made here. The hydraulic oscillator body includes a main body shell 100 and a transmission shaft 101 arranged in the main body shell 100. A piston tube 102 is fixedly sleeved on the transmission shaft 101. A ball seat 103 is provided below the piston tube 102. The ball seat 103 is provided at the bottom of the piston tube 102. The upper sliding sleeve 03 is provided with a mounting sleeve 104 fixedly mounted in the main body shell 100, and the same friction fixing mechanism is installed between the outer top of the ball seat 103 and the bottom of the piston tube 102, wherein the friction fixing mechanism includes two fixing blocks 2, and the two fixing blocks 2 are respectively fixedly connected to the tops of both sides of the ball seat 103, and the tops of the fixing blocks 2 are fixedly connected with a plurality of pointed blocks 3, and the bottom of the piston tube 102 is embedded with a hard rubber ring 1, and the bottom of the hard rubber ring 1 is in close contact with the tops of the plurality of pointed blocks 3, and under the friction force between the hard rubber ring 1 and the pointed blocks 3, the fixed connection between the ball seat 103 and the piston tube 102 is realized;

[0025] A conical groove 5 is provided on the top of the ball seat 103, and a connecting hole 6 is provided on the inner wall at the bottom of the conical groove 5. The connecting hole 6 is connected with the piston tube 102 through the conical groove 5. A blocking ball 4 is provided in the conical groove 5, and the conical groove 5 and the connecting hole 6 are blocked by the blocking ball 4. A vertical driving mechanism is fixedly connected to the bottom of the blocking ball 4, wherein the vertical driving mechanism comprises a vertical rod 7 fixedly connected to the bottom of the blocking ball 4, and a moving rod 9 is fixedly connected to the bottom end of the vertical rod 7. Thin rods 11 are fixedly connected to the inner walls on both sides of the mounting sleeve 104, and a waterproof box 16 is fixedly connected between the sides where the two thin rods 11 are close to each other. An electric telescopic rod 12 is fixedly connected between the inner walls on both sides of the waterproof box 16, and the waterproof box 16 is used to waterproof and shield the electric telescopic rod 12. To avoid the situation where liquid adheres to the electric telescopic rod 12, the top end of the output shaft of the electric telescopic rod 12 extends into the connecting hole 6 and is fixedly connected to the bottom of the moving rod 9, wherein a circular hole is opened on the top inner wall of the waterproof box 16, and a sealing ring is fixedly sleeved in the circular hole, and the inner wall of the sealing ring is in active contact with the outer side of the output shaft of the electric telescopic rod 12, and the sealing between the circular hole and the outer side of the output shaft of the electric telescopic rod 12 is achieved by the sealing ring. The electric telescopic rod 12 is used to drive the moving rod 9 to move vertically, and the front side of the electric telescopic rod 12 is fixed and electrically connected to the controller 17, and the controller 17 has a built-in wireless remote control module, and the wireless remote control module is matched with an external remote control. The wireless remote control module cooperates with the external remote control to remotely control the electric telescopic rod 12;

[0026] Two extrusion blocks 8 are fixedly connected to the inner walls of both sides of the connecting hole 6, and the moving rod 9 is located between the two extrusion blocks 8 opposite to each other at the top. The moving rod 9 is used to squeeze and drive the extrusion blocks 8, so as to drive the ball seat 103 to move vertically. The top of the thin rod 11 is fixedly connected with an elastic guiding mechanism, and the ball seat 103 is sleeved on the two elastic guiding mechanisms, wherein the elastic guiding mechanism includes a guiding rod 13 fixedly connected to the top of the thin rod 11, and the ball seat 103 is slidably sleeved on the two guiding rods 13, wherein guide grooves are opened on both sides of the bottom of the ball seat 103, and the inner wall of the guiding groove is slidably connected to the outer side of the corresponding guiding rod 13, and the guide rod 13 has a vertical guiding effect on the ball seat 103, and the bottom of the ball seat 103 is fixedly connected with two springs 14, which are movably sleeved on the corresponding guide rod 13, and the bottom end of the spring 14 on the right side is fixedly connected to the top of the corresponding thin rod 11, and the telescopic characteristics of the spring 14 can be used to provide the ball seat 103 with a space distance for vertical movement;

[0027] A waterproof pressure sensor 15 is embedded and fixed on the top of the thin rod 11, and the controller 17 is electrically connected to the waterproof pressure sensor 15. The bottom end of the spring 14 on the left is fixedly connected to the top of the waterproof pressure sensor 15. The waterproof pressure sensor 15 is used to detect the extrusion force of the left spring 14. A battery 10 is fixedly connected to the bottom inner wall of the waterproof box 16. The battery 10 is electrically connected to the controller 17, the electric telescopic rod 12 and the waterproof pressure sensor 15. The battery 10 supplies power to the controller 17, the electric telescopic rod 12 and the waterproof pressure sensor 15. The utility model, through a series of structural settings, can stably block the connecting hole 6 and release the fixation of the piston tube 102 by means of electric drive operation, which can effectively avoid the situation where the blockage is released due to liquid backflow and the piston tube 102 cannot be released due to small liquid impact force, thereby improving the stability of use.

[0028] Working principle: When in use, when the hydraulic oscillator body is in a closed state, the liquid enters through the transmission shaft 101, the piston tube 102, the tapered groove 5 and the connecting hole 6 in sequence. When the hydraulic oscillator is required to work, the connecting hole 6 needs to be blocked. The principle that the connecting hole 6 needs to be blocked when the hydraulic oscillator body works is a prior art, which has been disclosed in the patent document with application number 202321671843.5 and will not be elaborated here in detail;

[0029] When the connecting hole 6 is blocked, the wireless remote control module is controlled by the external remote control to cooperate with the controller 17 to control the electric telescopic rod 12 to start in the reverse direction. The output shaft of the electric telescopic rod 12 drives the moving rod 9 to move downward, and the moving rod 9 drives the vertical rod 7 to move downward. The vertical rod 7 drives the blocking ball 4 to move downward. The blocking ball 4 moves downward until it is in close contact with the inner wall of the conical groove 5. When the moving rod 9 moves downward to contact with the two extrusion blocks 8 below, the blocking ball 4 blocks the conical groove 5. At this time, the moving rod 9 that continues to move squeezes the two extrusion blocks 8 below to move downward. The two extrusion blocks 8 below squeeze and drive the ball seat 103 to move downward. The ball seat 103 slides downward on the two guide rods 13 and is compressed by the two springs 14. While the ball seat 103 moves downward, it also drives The two fixing blocks 2 move downward, and the fixing blocks 2 drive the corresponding multiple pointed blocks 3 to move downward and separate from the hard rubber ring 1, thereby releasing the fixation of the piston tube 102. At the same time, the waterproof pressure sensor 15 detects the squeezing force of the left spring 14 and transmits the detected pressure value to the controller 17. When the waterproof pressure sensor 15 detects that its squeezing force reaches the preset value, it proves that the piston tube 102 is completely released. At this time, the controller 17 controls the electric telescopic rod 12 to close, thereby completing the blocking of the connecting hole 6 and the release of the piston tube 102. The electric drive operation can effectively improve the stability of the operation process, effectively avoid the situation where the blockage is released due to liquid backflow and the piston tube 102 cannot be released due to small impact force, and improve the stability of use;

[0030] After the ball seat 103 moves down to release the fixation of the piston tube 102, the liquid turns to flow out through the outside of the ball seat 103, the piston is in an active state, and the hydraulic oscillator body produces periodic vibrations. The specific working principle of the hydraulic oscillator body producing periodic vibrations has been disclosed in a switchable hydraulic oscillator for oil and gas drilling disclosed in the patent document with application number 202321671843.5 and authorization announcement number CN220081318U, and will not be elaborated here.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hydraulic vibrator for oil and gas drilling, comprising a hydraulic vibrator body, the hydraulic vibrator body comprising a main body shell (100) and a transmission shaft (101) arranged in the main body shell (100), a piston tube (102) is fixedly sleeved on the transmission shaft (101), a ball seat (103) is arranged below the piston tube (102), and a mounting sleeve (104) fixedly installed in the main body shell (100) is slidably sleeved on the ball seat (103), characterized in that: A friction fixing mechanism is installed between the outer top of the ball seat (103) and the bottom of the piston tube (102). A conical groove (5) is provided on the top of the ball seat (103). A connecting hole (6) is provided on the inner wall of the bottom of the conical groove (5). The connecting hole (6) is connected to the piston tube (102) through the conical groove (5). A blocking ball (4) is provided in the conical groove (5). The bottom of the blocking ball (4) is fixedly connected to a vertical driving mechanism. Two extrusion blocks ( 8), the extrusion block (8) cooperates with the vertical driving mechanism, thin rods (11) are fixedly connected to the inner walls of both sides of the installation sleeve (104), the two thin rods (11) are fixedly connected to the vertical driving mechanism, the top of the thin rods (11) is fixedly connected to an elastic guide mechanism, the ball seat (103) is sleeved on the two elastic guide mechanisms, the top of the thin rods (11) is embedded and fixed with a waterproof pressure sensor (15) that cooperates with the elastic guide mechanism on the left side, and the waterproof pressure sensor (15) is electrically connected to the vertical driving mechanism.

2. A hydraulic vibrator for oil and gas drilling according to claim 1, characterized in that: The friction fixing mechanism comprises two fixing blocks (2), the two fixing blocks (2) are respectively fixedly connected to the tops of both sides of the ball seat (103), the tops of the fixing blocks (2) are fixedly connected to a plurality of pointed blocks (3), the bottom of the piston tube (102) is embedded with a hard rubber ring (1), and the bottom of the hard rubber ring (1) is in close contact with the tops of the plurality of pointed blocks (3).

3. A hydraulic vibrator for oil and gas drilling according to claim 2, characterized in that: The vertical driving mechanism comprises a vertical rod (7) fixedly connected to the bottom of the blocking ball (4); a moving rod (9) is fixedly connected to the bottom end of the vertical rod (7); the moving rod (9) is located between two opposite extrusion blocks (8) above; a waterproof box (16) is fixedly connected between the two thin rods (11); an electric telescopic rod (12) is fixedly connected between the inner walls of both sides of the waterproof box (16); the top end of the output shaft of the electric telescopic rod (12) extends into the connecting hole (6) and is fixedly connected to the bottom of the moving rod (9); a controller (17) is fixedly connected to the front side of the electric telescopic rod (12) and is electrically connected; and the controller (17) is electrically connected to the waterproof pressure sensor (15).

4. A hydraulic vibrator for oil and gas drilling according to claim 3, characterized in that: The elastic guide mechanism comprises a guide rod (13) fixedly connected to the top of the thin rod (11); a ball seat (103) is slidably mounted on the two guide rods (13); two springs (14) are fixedly connected to the bottom of the ball seat (103); the springs (14) are movably mounted on the corresponding guide rods (13); the bottom end of the left spring (14) is fixedly connected to the top of the waterproof pressure sensor (15); and the bottom end of the right spring (14) is fixedly connected to the top of the corresponding thin rod (11).

5. The hydraulic vibrator for oil and gas drilling according to claim 3, characterized in that: A storage battery (10) is fixedly connected to the inner wall of the bottom of the waterproof box (16), and the storage battery (10) is electrically connected to the controller (17), the electric telescopic rod (12) and the waterproof pressure sensor (15).

6. The hydraulic vibrator for oil and gas drilling according to claim 3, characterized in that: The controller (17) has a built-in wireless remote control module, and the wireless remote control module is matched with an external remote control.

7. A hydraulic vibrator for oil and gas drilling according to claim 4, characterized in that: Both sides of the bottom of the ball seat (103) are provided with guide grooves, and the inner walls of the guide grooves are slidably connected to the outer sides of the corresponding guide rods (13).

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