Self-excited hydraulic oscillation impactor

Abstract

This invention provides a self-excited hydraulic oscillation impactor, comprising a housing with an axially extending cavity inside to allow fluid to pass through; a vortex generating block formed by radially protruding vortex generating blocks on the inner wall of the housing; and a central modulation tube supported by the housing and housed within the cavity, comprising a modulation tube body and an axially extending modulation cavity defined within the modulation tube body; wherein the vortex generating block and the central modulation tube are arranged sequentially along the flow direction of the fluid within the cavity. This self-excited hydraulic oscillation impactor effectively reduces the hydraulic pulse frequency through a hydraulic pulse jet modulation mechanism, thereby improving the bottom hole hydraulic energy utilization rate and drilling efficiency.

Description

Technical Field

[0001] This invention relates to the field of petroleum development technology, and more specifically to a self-excited hydraulic oscillation impactor. Background Technology

[0002] As oil and gas exploration continues, the drilling industry is venturing into deeper and more complex formations. Currently, drilling in deep and ultra-deep hard formations generally suffers from problems such as slow speed, long cycle time, and high cost. In deep and ultra-deep well drilling, drilling costs can account for more than 70% of the total cost, making research on efficient drilling and rock breaking technologies imperative. Conventional mechanical speed-up tools use mechanical components to generate impacts, and these components often age prematurely due to fatigue damage and hydraulic erosion, limiting tool life. In addition, in deep and ultra-deep wells, with increasing depth, hydraulic losses along the drilling path increase, hydraulic energy decreases significantly, and the ability to break rocks and carry cuttings is greatly reduced. Rock cuttings cannot be removed in time, leading to repeated breakage and a significant decrease in drilling efficiency.

[0003] Therefore, how to improve the utilization rate of hydraulic energy at the bottom of the well and improve drilling efficiency has become an urgent technical problem to be solved in the field of oil development. Summary of the Invention

[0004] The purpose of this invention is to provide a self-excited hydraulic oscillation impactor, which effectively reduces the hydraulic pulse frequency through a hydraulic pulse jet modulation mechanism to adapt to the low-frequency resonance characteristics under oil drilling conditions, and increases the hydraulic pulse impact force through a secondary structure pressurization, thereby improving the bottom hole hydraulic energy utilization rate and drilling efficiency.

[0005] According to the present invention, a self-excited hydraulic oscillator is provided, comprising:

[0006] The housing has an axially extending cavity inside to allow fluid to pass through;

[0007] A vortex-generating block is formed by radially protruding sections on the inner wall of the shell; and

[0008] The central modulation tube is supported by a housing and housed within a cavity, and includes a modulation tube body and a modulation cavity that is defined within the modulation tube body and extends axially.

[0009] The vortex generating block and the central modulation tube are arranged sequentially along the flow direction of the fluid inside the cavity.

[0010] According to one embodiment of the present invention, it further includes an upper nozzle and a lower nozzle supported by a housing and housed within a cavity, wherein,

[0011] The upper nozzle is arranged upstream of the vortex generating block along the flow direction, and the interior of the upper nozzle defines an axially extending fluid inlet.

[0012] The lower nozzle is arranged downstream of the central modulation tube along the flow direction, and the interior of the lower nozzle defines an axially extending fluid outlet.

[0013] According to one embodiment of the present invention, the housing includes an upper housing and a lower housing arranged along the flow direction, wherein the upper housing and the lower housing are detachably connected.

[0014] According to one embodiment of the present invention, the upper housing sequentially defines the following structures along the flow direction inside:

[0015] Open at the top;

[0016] The upper nozzle receiving cavity supports and accommodates the upper nozzle;

[0017] An upper chamber, the radial dimension of which is larger than the radial dimensions of the fluid inlet and the modulation cavity, and a vortex generating block is disposed within the upper chamber; and

[0018] The central modulation tube receiving cavity supports and accommodates the central modulation tube.

[0019] According to one embodiment of the present invention, the interior of the lower housing sequentially defines the following structures along the flow direction:

[0020] The lower chamber has a radial dimension larger than that of the modulation chamber.

[0021] A lower nozzle receiving cavity that supports and accommodates the lower nozzle, wherein the radial dimension of the lower nozzle receiving cavity is smaller than the radial dimension of the lower chamber; and

[0022] The opening is at the bottom.

[0023] According to one embodiment of the present invention, the interior of the lower housing further defines a lower housing receiving cavity, wherein the lower housing receiving cavity is arranged downstream of the central modulation tube receiving cavity along the flow direction and is detachably connected to the lower housing by selectively receiving at least a portion of the lower housing.

[0024] According to one embodiment of the present invention, the self-excited hydraulic oscillator includes a plurality of vortex generating blocks, which are circumferentially arranged at equal intervals on the inner wall of the housing at the same axial position to form a vortex generating ring.

[0025] According to one embodiment of the present invention, the self-excited hydraulic oscillator includes a plurality of vortex generating rings arranged at intervals along the axial direction, wherein the radial dimensions of the plurality of vortex generating rings decrease sequentially along the flow direction.

[0026] According to one embodiment of the present invention, the eddy current generating block includes a first surface, a second surface, a third surface, a fourth surface, and a fifth surface, wherein,

[0027] The first, second, third, and fourth faces are adjacent to each other and intersect at the apex of the inner wall away from the shell.

[0028] The first and second surfaces are inclined at a first angle to the flow direction and are streamlined curved surfaces facing upstream of the fluid.

[0029] The third and fourth surfaces are inclined at a second angle to the flow direction and are streamlined curved surfaces facing downstream of the fluid.

[0030] The fifth face is adjacent to the third and fourth faces and is a plane perpendicular to the flow direction.

[0031] According to one embodiment of the present invention, the radial dimension of the modulation cavity first decreases and then increases along the flow direction, and the central modulation tube further includes a plurality of low-speed flow channels that are circumferentially arranged at equal intervals within the modulation tube body and extend axially.

[0032] By adopting the above technical solution, the present invention has at least the following beneficial effects:

[0033] 1. The self-excited hydraulic oscillation impactor according to the present invention can generate a low-frequency hydraulic pulse jet to match the low-frequency resonance environment in oil drilling environments;

[0034] 2. The self-excited hydraulic oscillation impactor according to the present invention effectively increases the pulse force and improves the impact performance of the tool through a two-stage self-excited resonance structure;

[0035] 3. According to the present invention, the high-speed jet generated by the vortex generating block and the nozzle effectively forms a hydraulic pulse vortex, and generates oscillation loss between the vortex generating blocks, thereby effectively reducing the hydraulic pulse oscillation frequency. Attached Figure Description

[0036] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0037] Figure 1 This is a schematic diagram of a self-excited hydraulic oscillator impactor according to an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of a housing according to an embodiment of the present invention;

[0039] Figure 3 yes Figure 1 Sectional view of section AA;

[0040] Figure 4 This is a schematic diagram of a vortex generator block according to an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of a center modulation tube according to an embodiment of the present invention;

[0042] Figure 6 yes Figure 1 Sectional view of section BB.

[0043] In the picture,

[0044] 100 Shell, 110 Upper Shell, 111 Upper Opening, 112 Upper Nozzle Receiving Chamber, 113 Upper Chamber, 114 Central Modulation Tube Receiving Chamber, 115 Lower Shell Receiving Chamber, 120 Lower Shell, 121 Lower Chamber, 122 Lower Nozzle Receiving Chamber, 123 Lower Opening, 200 Vortex Generating Block, 210 First Surface, 220 Second Surface, 230 Third Surface, 240 Fourth Surface, 250 Fifth Surface, 260 Vertex, 300 Central Modulation Tube, 310 Modulation Tube Body, 320 Contraction Tube, 330 Throat, 340 Diffusion Tube, 350 Low-Speed ​​Flow Channel, 400 Upper Nozzle, 500 Lower Nozzle. Detailed Implementation

[0045] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as “length,” “width,” “upper,” “lower,” “left,” “right,” “front,” “rear,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” indicate orientations or positions based on the orientations or positions shown in the accompanying drawings and are for ease of description only, and should not be construed as limiting the technical solution.

[0047] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion; the terms "first," "second," etc., used in the specification, claims, and accompanying drawings are used to distinguish different objects, not to describe a particular order. "A plurality of" means two or more, unless otherwise explicitly specified.

[0048] Furthermore, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0049] Figure 1 A self-excited hydraulic oscillator impactor according to an embodiment of the present invention is shown, which generally includes a housing 100, a vortex generating block 200, and a central modulation tube 300. The housing 100 has an axially extending cavity inside to allow fluid to flow through in the flow direction indicated by arrow F. The vortex generating block 200 may be a protrusion extending radially from the inner wall of the housing 100 to impact the fluid flowing within the cavity, thereby generating vortices. The central modulation tube 300 is supported by the housing 100 and housed within the cavity, and may include a generally tubular modulation tube body 310 and an axially extending modulation cavity defined within the modulation tube body 310. The central modulation tube 300 is arranged downstream of the vortex generating block 200 in the flow direction to cooperate with the vortex generating block 200 to create pressure oscillations in the fluid. Further, the self-excited hydraulic oscillator impactor may also include an upper nozzle 400 and a lower nozzle 500 supported by the housing 100 and housed within the cavity. The upper nozzle 400 is arranged upstream of the vortex generating block 200 along the flow direction, and the interior of the upper nozzle 400 defines an axially extending fluid inlet; the lower nozzle 500 is arranged downstream of the central modulation tube 300 along the flow direction, and the interior of the lower nozzle 500 defines an axially extending fluid outlet. In embodiments of the present invention, the fluid inlet and the fluid outlet may each include a constriction section adjacent to the upstream of the fluid, so that the radial dimensions of the fluid inlet and the fluid outlet gradually decrease along the flow direction.

[0050] Figure 2This is a schematic diagram of a housing 100 according to an embodiment of the present invention. Specifically, the housing 100 includes an upper housing 110 and a lower housing 120 arranged along the flow direction and detachably connected together. Specifically, the upper housing 110 internally defines an upper opening 111, an upper nozzle receiving cavity 112, an upper chamber 113, a central modulation tube receiving cavity 114, and a lower housing receiving cavity 115 sequentially along the flow direction; the lower housing 120 internally defines a lower chamber 121, a lower nozzle receiving cavity 122, and a lower opening 123 sequentially along the flow direction. The upper opening 111 may have internal threads for connecting a drill collar (not shown). Furthermore, the upper opening 111 may be configured with a radial dimension that gradually decreases along the flow direction to facilitate fluid reception. The upper nozzle receiving cavity 112 has a radial dimension matching the outer diameter of the upper nozzle 400 to support and accommodate the upper nozzle 400. Preferably, the upper nozzle receiving cavity 112 may be provided with internal threads for threaded connection with the upper nozzle 400, which is provided with external threads. The upper chamber 113 has a radial dimension larger than that of the fluid inlet and the modulation chamber, and the vortex generating block 200 is disposed within the upper chamber 113. The central modulation tube receiving cavity 114 has a radial dimension matching the outer diameter of the central modulation tube 300 to support and accommodate the central modulation tube 300, while defining the radial position of the central modulation tube 300 to prevent radial displacement. The lower chamber 121 communicates with the modulation chamber of the central modulation tube 300 and has a radial dimension larger than that of the modulation chamber. The lower nozzle receiving cavity 122 has a radial dimension matching the outer diameter of the lower nozzle 500 to support and accommodate the lower nozzle 500. Preferably, the lower nozzle receiving cavity 122 may be provided with internal threads for threaded connection with the lower nozzle 500, which is provided with external threads. In this embodiment, the upper housing 110 may selectively receive at least a portion of the lower housing 120 through the lower housing receiving cavity 115 and be threadedly connected to the lower housing 120. For example, a portion of the lower housing 120 received by the lower housing receiving cavity 115 may include at least the section containing the lower chamber 121, the section containing the lower nozzle receiving cavity 122, and a portion of the lower opening 123. Simultaneously, the end of the lower housing 120 adjacent to the lower chamber 121 may abut against the end of the central modulation tube 300, working in conjunction with the step formed on the inner wall of the upper housing 110 to define the axial position of the central modulation tube 300 and prevent axial displacement. Furthermore, a rectangular groove may be provided at the end of the lower housing receiving cavity 115 to facilitate the installation of the lower housing 120 and the transmission of torque. Alternatively, those skilled in the art may use other methods to connect the upper housing 110 and the lower housing 120.

[0051] Figure 3 It shows Figure 1 A cross-sectional view of section AA, which includes the radial section of the vortex generator block 200, combined with... Figure 4An example of a vortex generating block 200 according to an embodiment of the present invention is shown. The self-excited hydraulic oscillator may include a plurality of vortex generating blocks 200, which are circumferentially arranged at equal intervals at the same axial position on the inner wall of the housing 100 to form a vortex generating ring. Preferably, the same vortex generating ring includes 4-8 vortex generating blocks 200, more preferably 4 vortex generating blocks 200. Specifically, each vortex generating block 200 may include a first surface 210, a second surface 220, a third surface 230, a fourth surface 240, and a fifth surface 250. The first surface 210, the second surface 220, the third surface 230, and the fourth surface 240 are adjacent to each other and converge at the vertex 260 of the inner wall away from the shell 100. The first surface 210 and the second surface 220 are inclined at a first angle to the flow direction and are streamlined convex surfaces facing upstream of the fluid. The third surface 230 and the fourth surface 240 are inclined at a second angle to the flow direction and are streamlined convex surfaces facing downstream of the fluid. The fifth surface 250 is adjacent to the third surface 230 and the fourth surface 240 and is a plane perpendicular to the flow direction. Preferably, the first angle can be greater than the second angle, so that the first surface 210 and the second surface 220 are inclined at a relatively steep angle, while the third surface 230 and the fourth surface 240 are inclined at a relatively gentle angle. The streamlined surfaces of the first surface 210, the second surface 220, the third surface 230, and the fourth surface 240 cooperate with the vertical plane of the fifth surface 250 to facilitate the generation of vortices when the water flows.

[0052] The self-excited hydraulic oscillator impactor according to the present invention may comprise a plurality of vortex generating rings arranged at intervals along the axial direction. Preferably, the radial dimensions of the plurality of vortex generating rings decrease sequentially along the flow direction. Thus, the upstream vortex generating block 200 has a larger volume than the downstream vortex generating block 200, which is used to cooperate with the jet emitted from the upper nozzle 400 to generate vortices, thereby forming a pulsed jet and pressure feedback, and generating hydraulic oscillations between the vortex generating blocks 200, consuming a portion of the high-speed jet and reducing the frequency of the hydraulic pulse oscillation. Further combined with... Figures 1-2 The self-excited hydraulic oscillator impactor may include a first vortex generating ring near the upstream of the fluid and a second vortex generating ring near the downstream of the fluid, wherein the radial dimension of the vortex generating block 200 in the first vortex generating ring is larger than the radial dimension of the vortex generating block 200 in the second vortex generating ring. In an example of the present invention, the first vortex generating ring and the second vortex generating ring have the same number of vortex generating blocks 200, and the positions of the vortex generating blocks 200 are aligned with each other. Alternatively, the first vortex generating ring and the second vortex generating ring may also have different numbers of vortex generating blocks 200, and / or the positions of the vortex generating blocks 200 may also be alternately arranged.

[0053] Figure 5 This is a schematic diagram of a center modulation tube 300 according to an embodiment of the present invention. Figure 6 yes Figure 1 A cross-sectional view of section BB shows the radial section of the central modulation tube 300. In embodiments of the invention, the modulation cavity of the central modulation tube 300 provides a high-speed flow channel, the radial dimension of which first decreases and then increases along the flow direction. For example, the modulation cavity may sequentially include a contraction tube 320 with a gradually decreasing radial dimension, a throat tube 330 with a constant radial dimension, and a diffuser tube 340 with a gradually increasing radial dimension along the flow direction. Further, the central modulation tube 300 further includes a plurality of low-speed flow channels 350 circumferentially arranged at equal intervals within the modulation tube body 310 and extending axially to provide a low-speed flow channel. The central high-speed jet and the edge low-speed jet cooperate to form a vortex, which, in conjunction with the lower chamber 121, generates hydraulic pulse oscillation. The number of low-speed flow channels 350 is preferably four. Alternatively, those skilled in the art may increase or decrease the number of low-speed flow channels 350 according to actual operating conditions.

[0054] When the self-excited hydraulic oscillator impactor according to the present invention is working, drilling fluid flows in from the nozzle 400 on the impactor, forming a high-speed jet. The jet diffuses in the upper chamber 113, and the diffused jet collides with the turbine generating block. It is split at the front end of the vortex generating block 200 and finally converges at the rear of the vortex generating block 200, thereby forming a collision between high-speed and low-speed fluids to generate vortices. Accompanying the jet of vortices flowing downward, the central jet enters the modulation cavity of the central modulation tube 300, and the edge jets and vortices collide with the upper wall of the central modulation tube 300, forming pressure and vortex feedback. The pressure is transmitted downward, and the vortex feedbacks upward and collides with the incoming flow from above, forming pressure oscillation. Due to the low natural frequency of the outer shell, the pressure fluctuation in the cavity forms a low-frequency resonance with the outer shell. The fluid entering the central modulation tube 300 is divided into two parts. The central jet enters from the contraction tube, is accelerated through the contraction tube and throat 330 to form a high-speed jet, and is dispersed by the low-speed flow channel 350. The fluid at the edge flows through the low-velocity channel 350, forming a low-velocity jet. The high-velocity jet at the center and the low-velocity jet at the edge converge at the lower part of the central modulation tube 300, colliding with each other to generate vortices, thus generating a pulsed jet. The pulsed jet impacts the wall of the lower casing 120, creating pressure and vortex feedback, generating hydraulic pressure oscillations within the lower chamber 121, forming a two-stage hydraulic oscillation structure. The drilling fluid continues to flow downwards, entering the drill bit through the lower nozzle 500.

[0055] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0056] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0057] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A self-excited hydraulic oscillator, characterized in that, Include: A housing having an axially extending cavity inside to allow fluid to pass through; A vortex generating block is formed by radially protruding inner wall of the housing; as well as A central modulation tube, which is supported by the housing and housed within the cavity, and includes a modulation tube body and a modulation cavity defined within the interior of the modulation tube body and extending axially; The vortex generating block and the central modulation tube are arranged sequentially along the flow direction of the fluid in the cavity. The vortex generating block includes a first surface, a second surface, a third surface, a fourth surface, and a fifth surface. The first surface, the second surface, the third surface, and the fourth surface are adjacent to each other and converge at the apex of the inner wall away from the shell. The first surface and the second surface are inclined at a first angle to the flow direction and are streamlined curved surfaces facing upstream of the fluid. The third surface and the fourth surface are inclined at a second angle to the flow direction and are streamlined curved surfaces facing downstream of the fluid. The fifth surface is adjacent to the third surface and the fourth surface and is a plane perpendicular to the flow direction.

2. The self-excited hydraulic oscillator impactor according to claim 1, characterized in that, It further includes an upper nozzle and a lower nozzle supported by the housing and housed within the cavity, wherein, The upper nozzle is arranged upstream of the vortex generating block along the flow direction, and the interior of the upper nozzle defines an axially extending fluid inlet. The lower nozzle is arranged downstream of the central modulation tube along the flow direction, and the interior of the lower nozzle defines an axially extending fluid outlet.

3. The self-excited hydraulic oscillator impactor according to claim 2, characterized in that, The housing includes an upper housing and a lower housing arranged along the flow direction, wherein the upper housing and the lower housing are detachably connected.

4. The self-excited hydraulic oscillator impactor according to claim 3, characterized in that, The upper housing internally defines the following structures sequentially along the flow direction: Open at the top; An upper nozzle receiving cavity that supports and accommodates the upper nozzle; An upper chamber, the radial dimension of which is larger than the radial dimensions of the fluid inlet and the modulation cavity, and the vortex generating block is disposed within the upper chamber; and A central modulation tube receiving cavity that supports and accommodates the central modulation tube.

5. The self-excited hydraulic oscillator impactor according to claim 4, characterized in that, The interior of the lower housing is sequentially defined along the flow direction by the following structures: The lower chamber has a radial dimension larger than that of the modulation cavity; A lower nozzle receiving cavity that supports and accommodates the lower nozzle, wherein the radial dimension of the lower nozzle receiving cavity is smaller than the radial dimension of the lower chamber; as well as The opening is at the bottom.

6. The self-excited hydraulic oscillator impactor according to claim 5, characterized in that, The interior of the lower housing further defines a lower housing receiving cavity, wherein the lower housing receiving cavity is arranged downstream of the central modulation tube receiving cavity along the flow direction and is detachably connected to the lower housing by selectively receiving at least a portion of the lower housing.

7. The self-excited hydraulic oscillator impactor according to claim 1, characterized in that, The self-excited hydraulic oscillator includes multiple vortex generating blocks, which are circumferentially arranged at equal intervals on the inner wall of the shell at the same axial position to form a vortex generating ring.

8. The self-excited hydraulic oscillator impactor according to claim 7, characterized in that, The self-excited hydraulic oscillator includes a plurality of vortex generating rings arranged at intervals along the axial direction, wherein the radial dimensions of the plurality of vortex generating rings decrease sequentially along the flow direction.

9. The self-excited hydraulic oscillator impactor according to claim 1, characterized in that, The radial dimension of the modulation cavity first decreases and then increases along the flow direction, and the central modulation tube further includes a plurality of low-speed flow channels that are circumferentially arranged at equal intervals within the modulation tube body and extend axially.

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