Three-dimensional multidirectional vibration hydraulic oscillator for horizontal well drilling

Abstract

The invention relates to a horizontal well drilling three-dimensional multidirectional vibration hydraulic oscillator which comprises a drill rod connecting part, a circumferential vibration part, an axial vibration part, a radial vibration part, a power part and a radio frequency part which are sequentially connected in the axial direction, and the outer side wall of the drill rod connecting part is in threaded connection with the circumferential vibration part; one end of the drill rod connecting part is elastically connected with the axial vibration part; the power part comprises a single-head screw rod, a stator sleeve and a pressure stabilizing filter element; the radial vibration part comprises a movable valve seat; when the single-head screw is driven by fluid in the gap flow channel to rotate, the movable valve seat radially knocks the stator sleeve to generate radial vibration, and the flow area of the radio frequency flow channel is periodically changed, so that the axial vibration part and the circumferential vibration part respectively perform axial vibration and circumferential vibration relative to the drill rod connecting part.

Description

Technical Field

[0001] The invention relates to the technical field of drilling and development in the oil and gas industry, and in particular to a hydraulic oscillator for three-dimensional multi-directional vibration of horizontal well drilling. Background Art

[0002] With the continuous deepening of the development of unconventional oil and gas resources, horizontal wells have become the main well type for the development of shale oil and gas. During the horizontal well drilling process, the bottom drill string contacts the lower well wall due to gravity, generating a large friction resistance, resulting in the inability to effectively transmit the drilling pressure, causing problems such as pressure support and sticking. Pressure support and sticking lead to the inability to effectively transmit the drilling pressure to the drill bit, thereby reducing the mechanical drilling speed, increasing the drilling cycle, increasing the drilling cost, and even making it difficult to ensure the quality of the wellbore, causing serious downhole accidents. The best way to solve the problems of pressure support and sticking is to make the drill string vibrate at high frequency, convert the static friction of the drill bit into dynamic friction, thereby reducing the friction loss along the drill string. Most of the existing hydraulic oscillators use the method of changing the flow area of ​​the water hole to generate pressure fluctuations, and use the compression and rebound of the spring under the action of pressure fluctuations to generate axial vibrations. Due to the single vibration direction, insufficient vibration force and vibration displacement of this type of hydraulic oscillator, the pressure support problem in the sliding drilling process of ultra-deep and ultra-long horizontal wells has not been effectively solved, and there is a lack of more room for improvement. Summary of the invention

[0003] In order to solve one or more of the technical problems existing in the prior art, the present invention provides a hydraulic oscillator for three-dimensional multi-directional vibration in horizontal well drilling.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: A hydraulic oscillator for three-dimensional multi-directional vibration of horizontal well drilling, comprising a drill pipe connecting part, a circumferential vibration part, an axial vibration part, a radial vibration part, a power part and a radio frequency part connected in sequence axially, the outer side wall of the drill pipe connecting part is threadedly connected to the circumferential vibration part, and one end of the drill pipe connecting part is elastically connected to the axial vibration part;

[0005] The radial vibration part includes a moving valve seat, the power part includes a single-head screw, a stator sleeve and a pressure-stabilizing filter element, the single-head screw is adaptively arranged in the stator sleeve, one end of the single-head screw is rotatably connected to the inner side wall of one end of the stator sleeve through the pressure-stabilizing filter element, the other end of the single-head screw is provided with a moving valve seat, the outer diameter of the moving valve seat is larger than the outer diameter of the end face of the other end of the single-head screw, the inner side wall of the other end of the stator sleeve is connected with a radio frequency part, the radio frequency part has an axially penetrating radio frequency flow channel, a gap flow channel is formed between the single-head screw and the stator sleeve, the moving valve seat has a connecting cavity and is axially abutted against the radio frequency part, a first flow channel through hole connected to the connecting cavity is provided on an end face of the moving valve seat close to the radio frequency part, and a second flow channel through hole connected to the connecting cavity is provided on the side wall of the moving valve seat;

[0006] When the single-head screw is driven to rotate by the fluid in the gap flow channel, the movable valve seat radially knocks the stator sleeve, generating radial vibration, and causing the flow area of ​​the RF flow channel to change periodically, thereby causing the axial vibration part and the circumferential vibration part to vibrate axially and circumferentially relative to the drill pipe connection part respectively.

[0007] The beneficial effects of the present invention are as follows: the hydraulic oscillator of the present invention adopts a single-head screw and is connected to a moving valve seat, and can utilize fluid to drive the single-head screw to rotate in the stator sleeve, drive the moving valve seat to reciprocate up and down and knock the stator sleeve to produce a radial vibration effect, and further utilize the axial vibration part to produce axial vibration, and utilize the circumferential vibration part to produce circumferential vibration. Through multi-dimensional vibration superposition coupling, not only can the oscillation effect of the hydraulic oscillator be improved, but also static friction can be more effectively converted into dynamic friction, thereby reducing the friction coefficient between the drill string and the well wall, and can effectively improve the problems of horizontal well support pressure sticking, reduce friction torque, and improve the extension limit of the drill string in ultra-long horizontal wells.

[0008] Based on the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, a fixed valve seat is provided at one end of the RF part close to the dynamic valve seat, and the fixed valve seat includes a support seat, an eccentric seat and a sleeve, and the sleeve is provided at one end of the RF part close to the dynamic valve seat, the support seat is a hollow structure and is fixed to one end surface of the RF part by a fixing pin, and the eccentric seat is fixed to the support seat and is sealed in the sleeve; an eccentric flow hole connected to the RF flow channel is provided on the eccentric seat, and the eccentric flow hole is arranged upwardly away from the axis of the RF part; the first flow channel through hole is arranged eccentrically downward on one end surface of the dynamic valve seat.

[0010] The beneficial effect of adopting the above further scheme is: the eccentrically arranged first flow channel through hole and the eccentric flow hole can make the moving valve seat reciprocate and radially knock the stator sleeve, generating radial vibration while also causing periodic changes in the flow area of ​​the RF flow channel.

[0011] Furthermore, when the single-start screw is driven to rotate by the fluid in the gap flow channel, the first flow channel through hole of the movable valve seat is axially arranged corresponding to the eccentric flow hole or the movable valve seat blocks the eccentric flow hole.

[0012] Furthermore, the stator sleeve includes a stator inner tube and a stator outer tube, the stator inner tube is fixedly sleeved in the stator outer tube, the single-head screw is adaptively sleeved in the stator inner tube, the other end of the single-head screw extends from the stator inner tube, and the movable valve seat is located outside one end of the stator inner tube.

[0013] Furthermore, the circumferential vibration part includes a threaded outer cylinder, the drill rod connecting part includes a spindle piston, one end of the threaded outer cylinder is sealed and connected to one end of the axial vibration part, the spindle piston is sleeved in the threaded outer cylinder and is threadedly connected to the threaded outer cylinder, and one end of the spindle piston located in the threaded outer cylinder is elastically connected to the axial vibration part.

[0014] Furthermore, a nine-head thread structure is provided on the inner side wall of the threaded outer cylinder.

[0015] Furthermore, one end of the threaded outer cylinder is threadedly connected to an outer side wall of one end of the axial vibration part, and an inner side wall of the threaded outer cylinder and an inner side wall of the axial vibration part are limited by an anti-retraction steel ball.

[0016] Furthermore, the other end of the threaded outer cylinder is sealed and connected with a sealing joint, and the spindle piston passes through the sealing joint and is sealed and rotatably connected with the sealing joint.

[0017] Furthermore, the axial vibration part includes a disc spring outer tube, a disc spring is arranged inside the disc spring outer tube, one end of the disc spring outer tube is sealedly connected to the outer side wall of the stator sleeve, the other end of the disc spring outer tube is sealedly connected to the threaded outer tube, the disc spring is sleeved on the spindle piston, one end of the disc spring is fixed on the inner side wall of the disc spring outer tube, and the other end of the disc spring is connected to the outer side wall of the spindle piston.

[0018] Furthermore, a disc spring groove is provided on the inner wall of the disc spring outer tube, and a pressure cap is provided on the outer wall sealing sleeve of the spindle piston. The outer peripheral side wall of the pressure cap is in sealing and rotatable abutment with the disc spring groove; the other end of the disc spring abuts against the pressure cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the axial cross-sectional structure of the hydraulic vibrator for three-dimensional multi-directional vibration in horizontal well drilling of the present invention;

[0020] Figure 2 It is a cross-sectional structural schematic diagram of the cooperation between the spindle piston and the threaded outer cylinder of the present invention;

[0021] Figure 3 It is a schematic cross-sectional view of the structure of the middle part of the single-start screw rod matching with the stator sleeve of the present invention;

[0022] Figure 4 It is a cross-sectional structural schematic diagram of the cooperation between the end of the single-start screw and the stator sleeve of the present invention;

[0023] Figure 5 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0024] Figure 6 for Figure 1 A schematic diagram of the enlarged structure of the middle B part;

[0025] Figure 7 for Figure 1 The enlarged structural diagram of the middle C part;

[0026] Figure 8 for Figure 1 The enlarged structural diagram of the middle D part;

[0027] Fig. 9 The structural principle of the axial vibration of the hydraulic oscillator of the present invention Figure 1 ;

[0028] Fig.10 The structural principle of the axial vibration of the hydraulic oscillator of the present invention Figure 2 .

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1. Drill pipe connection; 11. Mandrel piston; 12. Threaded outer cylinder; 13. Nine-head thread structure;

[0031] 2. Axial vibration part; 21. Disc spring; 22. Disc spring outer tube; 23. Disc spring groove; 24. Pressure cap;

[0032] 3. Power unit; 31. Single-head screw; 32. Stator inner cylinder; 33. Pressure-stabilizing filter element; 34. Moving valve seat; 35. Clearance flow channel; 36. First flow channel through hole; 37. Communication cavity; 38. Stator outer cylinder;

[0033] 4. RF unit; 41. fixed valve seat; 42. eccentric flow hole; 43. fixing pin; 44. sheath; 45. eccentric seat; 46. support seat; 47. eccentric ring;

[0034] 5. Anti-retraction steel ball; 6. Sealing joint; 7. Rotating sealing ring; 71. Wear-resistant belt; 72. Dustproof ring; 73. Plug; 74. O-ring;

[0035] 8. Connecting tube; 9. Radial vibration part; 10. Circumferential vibration part. DETAILED DESCRIPTION

[0036] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0037] like Figures 1 to 10As shown, a hydraulic oscillator with three-dimensional multi-directional vibration for horizontal well drilling of the present embodiment comprises a drill pipe connection part 1, a circumferential vibration part 10, an axial vibration part 2, a radial vibration part 9, a power part 3 and a radio frequency part 4 which are axially connected in sequence, the outer wall of the drill pipe connection part 1 being threadedly connected to the circumferential vibration part 10, and one end of the drill pipe connection part 1 being elastically connected to the axial vibration part 2; the power part 3 comprises a single-head screw 31, a stator sleeve and a pressure-stabilizing filter element 33, the radial vibration part 9 comprises a moving valve seat 34, the single-head screw 31 is adaptively arranged in the stator sleeve, and one end of the single-head screw 31 is connected to the inner wall of one end of the stator sleeve through the pressure-stabilizing filter element 33. The single-head screw 31 is rotatably connected to the wall, the other end of the single-head screw 31 is provided with a movable valve seat 34, the outer diameter of the movable valve seat 34 is larger than the outer diameter of the other end face of the single-head screw 31, the inner side wall of the other end of the stator sleeve is connected with a radio frequency part 4, the radio frequency part 4 has an axially through radio frequency flow channel, a gap flow channel 35 is formed between the single-head screw 31 and the stator sleeve, the movable valve seat 34 has a connecting cavity 37 and axially abuts against the radio frequency part 4, the end face of the movable valve seat 34 close to the radio frequency part 4 is provided with a first flow channel through hole 36 communicating with the connecting cavity 37, and the side wall of the movable valve seat 34 is provided with a second flow channel through hole communicating with the connecting cavity 37;

[0038] When the single-head screw 31 rotates driven by the fluid in the gap flow channel 35, the movable valve seat 34 radially knocks the stator sleeve, generating radial vibration, and causing the flow area of ​​the RF flow channel to change periodically, thereby causing the axial vibration part and the circumferential vibration part to vibrate axially and circumferentially relative to the drill pipe connection part respectively.

[0039] Specifically, one axial end of the axial vibration part 2 is connected to the stator sleeve, and the other axial end of the axial vibration part 2 is connected to one axial end of the circumferential vibration part 10 .

[0040] Specifically, Figure 8 to Figure 10As shown, in this embodiment, a fixed valve seat 41 is provided at one end of the RF part 4 close to the moving valve seat 34, and the fixed valve seat 41 includes a support seat 46, an eccentric seat 45 and a sheath 44. The sheath 44 is sleeved on one end of the RF part 4 close to the moving valve seat 34. The support seat 46 is a hollow structure and is fixed to one end face of the RF part 4 by a fixing pin 43. The eccentric seat 45 is fixed to the support seat 46 and is sealed and connected in the sheath 44. An eccentric flow hole 42 communicating with the RF flow channel is provided on the eccentric seat 45, and the eccentric flow hole 42 is arranged upward away from the axis of the RF part 4. The first flow channel through hole 36 is arranged eccentrically downward on one end face of the moving valve seat 34. The eccentrically arranged first flow channel through hole and eccentric flow hole can make the moving valve seat reciprocate and radially strike the stator sleeve, generate radial vibration, and also make the flow area of ​​the RF flow channel change periodically. The up and down orientations described in this embodiment are based on the up and down orientations shown in the figures.

[0041] A preferred solution of this embodiment is that both the first flow channel through hole 36 and the eccentric flow hole 42 are circular holes, and the inner diameter of the first flow channel through hole 36 is the same as the inner diameter of the eccentric flow hole 42 .

[0042] Specifically, Figure 8 As shown, one end of the communication cavity 37 of the movable valve seat 34 is an open structure, an eccentric ring 47 is provided in the open structure, and the first flow channel through hole 36 is provided on the eccentric ring 47 .

[0043] like Fig. 9 and Fig.10 As shown, when the single-head screw 31 of this embodiment rotates driven by the fluid in the gap flow channel 35 , the first flow channel through hole 36 of the movable valve seat 34 is axially arranged corresponding to the eccentric flow hole 42 or the movable valve seat 34 blocks the eccentric flow hole 42 .

[0044] like Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, the stator sleeve of this embodiment includes a stator inner tube 32 and a stator outer tube 38, the stator inner tube 32 is fixedly sleeved in the stator outer tube 38, the single-head screw 31 is adaptively sleeved in the stator inner tube 32, the other end of the single-head screw 31 extends out from the stator inner tube 32, and the movable valve seat 34 is located outside one end of the stator inner tube 32. Among them, the structure of the stator sleeve and the single-head screw 31 of this embodiment is matched with the existing commonly used screw drilling tools, and the number of spiral threads of the single-head screw 31 of the screw drilling tool is one less than the number of spiral threads of the stator inner tube 32, as shown in FIG. Figure 3The movable valve seat 34 is located outside one end of the stator inner tube 32 , and when the single-head screw 31 rotates in the stator inner tube 32 , the movable valve seat 34 rotates and moves up and down in the stator outer tube 38 to knock the inner wall of the stator outer tube 38 .

[0045] like Figure 2 and Figure 5 As shown, the circumferential vibration part 10 of this embodiment includes a threaded outer cylinder 12, and the drill rod connecting part 1 includes a spindle piston 11. One end of the threaded outer cylinder 12 is sealed and connected to one end of the axial vibration part 2. The spindle piston 11 is sleeved in the threaded outer cylinder 12 and is threadedly connected to the threaded outer cylinder 12. One end of the spindle piston 11 located in the threaded outer cylinder 12 is elastically connected to the axial vibration part 2.

[0046] like Figure 2 As shown, preferably, a nine-start thread structure 13 is provided on the inner wall of the threaded outer cylinder 12 .

[0047] like Figure 5 As shown, one end of the threaded outer cylinder 12 of this embodiment is threadedly connected to the outer wall of one end of the axial vibration part 2, and the inner wall of the threaded outer cylinder 12 and the inner wall of the axial vibration part 2 are limited by an anti-retraction steel ball 5.

[0048] like Figure 5 As shown, the other end of the threaded outer cylinder 12 of this embodiment is sealed and connected with a sealing joint 6 , and the spindle piston 11 passes through the sealing joint 6 and is sealed and rotatably connected with the sealing joint 6 .

[0049] like Figure 6 As shown, the axial vibration part 2 of this embodiment includes a disc spring outer cylinder 22, a disc spring 21 is arranged inside the disc spring outer cylinder 22, one end of the disc spring outer cylinder 22 is sealedly connected to the outer wall of the stator sleeve, and the other end of the disc spring outer cylinder 22 is sealedly connected to the threaded outer cylinder 12, the disc spring 21 is sleeved on the spindle piston 11, one end of the disc spring 21 is fixed on the inner wall of the disc spring outer cylinder 22, and the other end of the disc spring 21 is connected to the outer wall of the spindle piston 11.

[0050] like Figure 6 As shown, in this embodiment, a disc spring groove 23 is provided on the inner side wall of the disc spring outer cylinder 22, and a pressure cap 24 is provided on the outer side wall sealing sleeve of the spindle piston 11, and the outer peripheral side wall of the pressure cap 24 is in sealing and rotatable contact with the disc spring groove 23; the other end of the disc spring 21 is in contact with the pressure cap 24. The outer side wall of the pressure cap 24 is in sealing and rotatable connection with the inner side wall of the disc spring outer cylinder 22 through a wear-resistant belt 71 and a rotary seal ring 7, and the inner side wall of the pressure cap 24 is in sealing and rotatable connection with the outer side wall of the spindle piston 11 through an O-ring.

[0051] Specifically, Figure 5 As shown, the two ends of the threaded outer cylinder 12 of this embodiment are sealed and limitedly connected with the outer wall of the disc spring outer cylinder 22 and the outer wall of the sealing joint 6 through the anti-retraction steel ball 5 and the plug 73. The inner wall of the sealing joint 6 is sealed and rotatably connected with the outer wall of the spindle piston 11 through the rotating sealing ring 7, the wear-resistant belt 71 and the dust ring 72.

[0052] Specifically, Figure 7 As shown, one end of the stator outer cylinder 38 of this embodiment is connected to the disc spring outer cylinder 22 through a connecting cylinder 8, and the two ends of the connecting cylinder 8 are respectively inserted into the stator outer cylinder 38 and the disc spring outer cylinder 22 and are respectively connected and limited with the stator outer cylinder 38 and the disc spring outer cylinder 22 through anti-retraction steel balls 5 and plugs 73. In addition, the two ends of the connecting cylinder 8 are also sealed and connected with the stator outer cylinder 38 and the disc spring outer cylinder 22 through O-rings 74. Figure 7 In the embodiment, one end of the single-head screw 31 is also provided with a pressure-stabilizing filter element 33, which can be arranged on the inner side wall of the stator outer cylinder 38 or the inner side wall of the connecting cylinder 8, and is used to filter the fluid and stabilize the pressure. A gap is reserved between the pressure-stabilizing filter element 33 and the end of the spindle piston 11. The connecting cylinder 8 can also limit the axial movement of the spindle piston 11. Specifically, one end of the pressure cap 24 can abut against the end of the connecting cylinder 8 to prevent the spindle piston 11 from excessive axial movement.

[0053] The hydraulic oscillator of this embodiment can take the drill pipe connection part (that is, the spindle piston) as one part and all other parts as another part for actual application conditions. In actual application conditions, the spindle piston is connected to the drill pipe and the spindle piston is stationary, then all other parts will perform three-dimensional multi-directional motion relative to the spindle piston, and the axial vibration part and the circumferential vibration part are connected together. In fact, the axial vibration part and the circumferential vibration part perform axial vibration and circumferential vibration at the same time. Except for the axial vibration part and the circumferential vibration part, based on the connection relationship of all other parts, all other parts perform axial vibration and circumferential vibration relative to the spindle piston, that is, the radial vibration part, the power part and the radio frequency part also perform axial vibration and circumferential vibration relative to the spindle piston, and at the same time the radial vibration part also performs radial knocking on the stator sleeve, so that the entire hydraulic oscillator except the spindle piston performs axial vibration, circumferential vibration and radial vibration.

[0054] In order to explain the three-dimensional vibration, we will now explain the principle of the hydraulic oscillator separately from the actual working conditions. The fluid enters the power unit through the inner cavity flow channel of the hydraulic oscillator, driving the single-head screw of the power unit to rotate. The single-head screw acts as a rotor to drive the movable valve seat to reciprocate up and down, such as Figure 4As shown, the radial vibration effect is produced by knocking the stator outer cylinder. The reciprocating motion of the moving valve seat causes the flow area between the moving valve seat and the fixed valve seat to change periodically, thereby generating a radio frequency effect, resulting in a periodically changing pulse pressure near the axial vibration part. Under the action of the pulse pressure, the spindle piston produces axial periodic reciprocating motion. At the same time, due to the threaded connection between the spindle piston and the threaded outer cylinder, the spindle piston also produces circumferential rotation motion, producing a circumferential vibration effect; in actual working conditions, the spindle piston is fixed, and other parts connected to it vibrate axially and circumferentially relative to each other. Fig. 9 In the process, the moving valve seat blocks the eccentric flow hole on the fixed valve seat, the spindle piston moves axially under the pulse pressure, and at the same time moves circumferentially clockwise under the limit of the threaded outer cylinder; in actual working conditions, the spindle piston is fixed and the threaded outer cylinder moves circumferentially clockwise. Fig.10 In the embodiment, the first flow channel through hole of the movable valve seat corresponds to the eccentric flow hole on the fixed valve seat, the spindle piston returns to its original position under the action of the disc spring, and at the same time moves counterclockwise circumferentially under the limit of the threaded outer cylinder; in actual working conditions, the spindle piston does not move, and the threaded outer cylinder moves counterclockwise circumferentially.

[0055] The hydraulic oscillator of this embodiment uses a single-head screw and is connected to a moving valve seat. The single-head screw can be driven by fluid to rotate in the stator sleeve, driving the moving valve seat to reciprocate up and down and knocking the stator sleeve to produce radial vibration effect. The axial vibration part is further used to produce axial vibration, and the circumferential vibration part is used to produce circumferential vibration. Through multi-dimensional vibration superposition coupling, not only can the oscillation effect of the hydraulic oscillator be improved, but also static friction can be more effectively converted into dynamic friction, reducing the friction coefficient between the drill string and the well wall, which can effectively improve the problems of horizontal well support pressure sticking, reduce friction torque, and improve the extension limit of the drill string of ultra-long horizontal wells. The hydraulic oscillator of this embodiment solves the limitation of traditional hydraulic oscillators that only rely on water pulse energy to produce a single vibration mode from a higher vibration dimension, and effectively solves the problem of reducing friction and drag during horizontal well drilling.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0061] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A hydraulic vibrator for three-dimensional multi-directional vibration of horizontal well drilling, characterized in that: It comprises a drill rod connection part, a circumferential vibration part, an axial vibration part, a radial vibration part, a power part and a radio frequency part which are connected in sequence axially, wherein the outer wall of the drill rod connection part is threadedly connected to the circumferential vibration part, and one end of the drill rod connection part is elastically connected to the axial vibration part; The radial vibration part includes a moving valve seat, the power part includes a single-head screw, a stator sleeve and a pressure-stabilizing filter element, the single-head screw is adaptively arranged in the stator sleeve, one end of the single-head screw is rotatably connected to the inner side wall of one end of the stator sleeve through the pressure-stabilizing filter element, the other end of the single-head screw is provided with a moving valve seat, the outer diameter of the moving valve seat is larger than the outer diameter of the end face of the other end of the single-head screw, the inner side wall of the other end of the stator sleeve is connected with a radio frequency part, the radio frequency part has an axially penetrating radio frequency flow channel, a gap flow channel is formed between the single-head screw and the stator sleeve, the moving valve seat has a connecting cavity and is axially abutted against the radio frequency part, a first flow channel through hole connected to the connecting cavity is provided on an end face of the moving valve seat close to the radio frequency part, and a second flow channel through hole connected to the connecting cavity is provided on the side wall of the moving valve seat; When the single-head screw is driven to rotate by the fluid in the gap flow channel, the movable valve seat radially knocks the stator sleeve, generating radial vibration, and causing the flow area of ​​the RF flow channel to change periodically, thereby causing the axial vibration part and the circumferential vibration part to vibrate axially and circumferentially relative to the drill pipe connection part respectively.

2. According to claim 1, a hydraulic vibrator for three-dimensional multi-directional vibration of horizontal well drilling is characterized in that: A fixed valve seat is provided at one end of the RF part close to the moving valve seat, and the fixed valve seat includes a support seat, an eccentric seat and a sleeve. The sleeve is provided at one end of the RF part close to the moving valve seat. The support seat is a hollow structure and is fixed to one end surface of the RF part by a fixing pin. The eccentric seat is fixed to the support seat and is sealed in the sleeve; an eccentric flow hole connected to the RF flow channel is provided on the eccentric seat, and the eccentric flow hole is arranged upward, deviating from the axis of the RF part; the first flow channel through hole is arranged eccentrically downward on one end surface of the moving valve seat.

3. According to claim 2, a hydraulic vibrator for three-dimensional multi-directional vibration of horizontal well drilling is characterized in that: When the single-start screw is driven to rotate by the fluid in the gap flow channel, the first flow channel through hole of the movable valve seat is axially arranged corresponding to the eccentric flow hole or the movable valve seat blocks the eccentric flow hole.

4. The hydraulic vibrator for three-dimensional multi-directional vibration of horizontal well drilling according to claim 1, characterized in that: The stator sleeve comprises a stator inner tube and a stator outer tube, the stator inner tube is fixedly sleeved in the stator outer tube, the single-head screw is adaptively sleeved in the stator inner tube, the other end of the single-head screw extends out from the stator inner tube, and the movable valve seat is located outside one end of the stator inner tube.

5. The hydraulic vibrator for three-dimensional multi-directional vibration of horizontal well drilling according to claim 1, characterized in that: The circumferential vibration part includes a threaded outer cylinder, and the drill rod connecting part includes a spindle piston. One end of the threaded outer cylinder is sealed and connected to one end of the axial vibration part. The spindle piston is sleeved in the threaded outer cylinder and is threadedly connected to the threaded outer cylinder. One end of the spindle piston located in the threaded outer cylinder is elastically connected to the axial vibration part.

6. The hydraulic vibrator for three-dimensional multi-directional vibration of horizontal well drilling according to claim 5, characterized in that: A nine-head thread structure is arranged on the inner side wall of the threaded outer cylinder.

7. The hydraulic vibrator for three-dimensional multi-directional vibration of horizontal well drilling according to claim 5, characterized in that: One end of the threaded outer cylinder is threadedly connected to an outer side wall of one end of the axial vibration part, and an inner side wall of the threaded outer cylinder and an inner side wall of the axial vibration part are limited by an anti-retraction steel ball.

8. The hydraulic vibrator for three-dimensional multi-directional vibration of horizontal well drilling according to claim 5, characterized in that: The other end of the threaded outer cylinder is sealed with a sealing joint, and the spindle piston passes through the sealing joint and is sealed and rotatably connected with the sealing joint.

9. A hydraulic vibrator for three-dimensional multi-directional vibration of horizontal well drilling according to any one of claims 5 to 8, characterized in that: The axial vibration part includes a disc spring outer cylinder, a disc spring is arranged inside the disc spring outer cylinder, one end of the disc spring outer cylinder is sealedly connected to the outer side wall of the stator sleeve, and the other end of the disc spring outer cylinder is sealedly connected to the threaded outer cylinder, the disc spring is sleeved on the spindle piston, one end of the disc spring is fixed to the inner side wall of the disc spring outer cylinder, and the other end of the disc spring is connected to the outer side wall of the spindle piston.

10. The hydraulic vibrator for three-dimensional multi-directional vibration of horizontal well drilling according to claim 9, characterized in that: A disc spring groove is provided on the inner wall of the disc spring outer tube, and a pressure cap is provided on the outer wall sealing sleeve of the spindle piston. The outer peripheral side wall of the pressure cap is in sealing and rotatable abutment with the disc spring groove; the other end of the disc spring abuts against the pressure cap.

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