A multi-frequency carbon dioxide jet tool

Abstract

The present invention discloses a multi-frequency carbon dioxide jet tool, which includes an upper connection terminal, a shunt housing, a rotating housing, a lower connection terminal and a pulse generating mechanism; the shunt housing includes an integrally formed connection part and a jet part; the rotating housing is rotatably arranged on the connection part; a first main flow channel, a first cleaning flow channel and a first pulse flow channel are formed in the lower connection terminal; the pulse generating mechanism includes a plug body and an elastic member, the plug body is slidably arranged in the communication groove, one end of the elastic member is connected to the inner wall of the first pulse flow channel, and the other end of the elastic member is connected to the plug body. The beneficial effect of the technical solution proposed by the present invention is that by injecting pulsed jet through the first side punching into the annulus, the jet has greater kinetic energy, thereby increasing the kinetic energy of the fluid in the annulus and improving its ability to entrain gravel, thereby reducing the amount of gravel accumulated at the bottom of the well and improving the drilling efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of jet tools, in particular to a multi-frequency carbon dioxide jet tool. Background Art

[0002] Hydraulic booster jet technology is a technology that uses a specially designed bottom hole booster device in conjunction with a drill bit to achieve high-pressure jet-assisted drilling and increase drilling speed. The existing downhole booster device has the following technical problems:

[0003] (1) The impact force of the pressurized jet is low, and the rock breaking effect is poor;

[0004] (2) After the jet impacts the rock at the bottom of the well, its kinetic energy decreases rapidly, resulting in lower kinetic energy of the fluid in the annulus flowing upward, and the ability of the fluid to carry gravel and sand is reduced, resulting in a large amount of gravel gathering at the bottom of the well, reducing drilling efficiency. Summary of the invention

[0005] In view of this, it is necessary to provide a multi-frequency carbon dioxide jet tool to solve the technical problems of low jet impact force and poor rock breaking effect of the existing downhole booster device, as well as low kinetic energy of upward return of fluid in the annulus, which leads to a large amount of gravel gathering at the bottom of the well and reduces drilling efficiency.

[0006] In order to achieve the above-mentioned object, the present invention provides a multi-frequency carbon dioxide jet tool, including an upper connecting terminal, a flow dividing shell, a rotating shell, a lower connecting terminal and a pulse generating mechanism;

[0007] The upper end of the upper connecting terminal is used to connect the drill rod;

[0008] The flow splitting housing comprises an integrally formed connection portion and a jet portion, the connection portion is fixedly connected to the lower end of the upper connection terminal, the inner cavity of the connection portion is communicated with the inner cavity of the upper connection terminal, the inner cavity of the jet portion is communicated with the inner cavity of the connection portion, and a plurality of first side punching holes are uniformly opened on the jet portion;

[0009] The rotating shell is rotatably disposed on the connecting portion, and a plurality of spiral shielding strips are fixed on the outer wall of the rotating shell, each of which is attached to the outer wall of the jet portion and can block a portion of the first side punching hole;

[0010] The lower connecting terminal is provided with a first main flow channel, a first cleaning flow channel and a first pulse flow channel, the upper ends of the first main flow channel, the first cleaning flow channel and the first pulse flow channel are all connected to the inner cavity of the jet part, the lower end of the lower connecting terminal is used to connect to the drill tool, the first main flow channel is used to communicate with the inner cavity of the drill tool, the outer side wall of the lower connecting terminal is provided with a second side punching hole connected to the first cleaning flow channel, and the lower end of the first pulse flow channel is connected to the first main flow channel via a connecting groove;

[0011] The pulse generating mechanism comprises a plug body and an elastic member, wherein the plug body is slidably disposed in the connecting groove, one end of the elastic member is connected to the inner wall of the first pulse flow channel, and the other end of the elastic member is connected to the plug body.

[0012] In some embodiments, the diverter shell also includes a diverter portion, in which a second main flow channel, a second cleaning flow channel and a second pulse flow channel are opened, the upper ends of the second main flow channel, the second cleaning flow channel and the second pulse flow channel are connected to the inner cavity of the jet portion, the lower end of the second main flow channel is connected to the upper end of the first main flow channel, the lower end of the second cleaning flow channel is connected to the upper end of the first cleaning flow channel; the lower end of the second pulse flow channel is connected to the upper end of the first pulse flow channel.

[0013] In some embodiments, the first side punching hole and the second side punching hole are both arranged to be inclined upward from the inside to the outside.

[0014] In some embodiments, a mounting portion is formed at the lower end of the upper connecting terminal, and the connecting portion is fixedly inserted into the mounting portion.

[0015] In some embodiments, an annular groove is provided on the outer wall of the mounting portion, the rotating shell is sleeved on the mounting portion, an annular protrusion matching the annular groove is provided on the inner wall of the rotating shell, and the annular protrusion is inserted into the annular groove.

[0016] In some embodiments, a spring placement groove is further opened in the lower connecting terminal, the elastic member is built into the spring placement groove, one end of the elastic member abuts against the plug body, and the other end of the elastic member abuts against the inner bottom wall of the spring placement groove.

[0017] In some embodiments, a blocking block is fixed on the plug body, and the blocking block abuts against one end of the elastic member.

[0018] In some embodiments, a plurality of guide blocks are fixed on the plug body, and the guide blocks are slidably disposed in the first pulse flow channel.

[0019] In some embodiments, the first pulse flow channel is arc-shaped, and the plug body and each of the guide blocks are also arc-shaped.

[0020] In some embodiments, the upper end of the plug body has an arc-shaped notch. When the plug body moves downward to connect the arc-shaped notch with the first main flow channel, the fluid in the first pulse flow channel flows from the arc-shaped notch into the first main flow channel.

[0021] Compared with the prior art, the technical solution proposed in the present invention has the following beneficial effects: a pulsed jet is injected into the annulus through the first side punching hole, so that the jet has greater kinetic energy, thereby increasing the kinetic energy of the fluid in the annulus and increasing its ability to entrain gravel, thereby reducing the amount of gravel accumulated at the bottom of the well to improve drilling efficiency; at the same time, the jet injected into the annulus through the second side punching hole causes the spiral shielding strip to rotate, thereby realizing the periodic opening and closing of the first side punching hole and increasing the impact force of the jet injected from the first side punching hole; in addition, by arranging a plug body and an elastic member in the first pulse flow channel, energy can be periodically stored in the first pulse flow channel and the pulse jet can be injected into the outlet of the first main flow channel, and after mixing with the fluid normally injected in the first main flow channel, it enters the drilling tool and is injected from the spray hole of the drill bit to impact the bottom of the well, assist in rock breaking, and improve the rock breaking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the multi-frequency carbon dioxide jet tool provided by the present invention;

[0023] Figure 2 yes Figure 1 Bottom view of

[0024] Figure 3 yes Figure 2 Section view of mid-section AA;

[0025] Figure 4 yes Figure 2 Sectional view of the middle section BB;

[0026] Figure 5 yes Figure 3 A schematic diagram of the three-dimensional structure of the lower connecting terminal in FIG.

[0027] Figure 6 yes Figure 5 Exploded view of the lower connection terminal in;

[0028] Figure 7 yes Figure 6 Schematic diagram of the structure from another perspective;

[0029] In the figure: 1-upper connecting terminal, 11-mounting part, 2-diverter shell, 21-connecting part, 22-jet part, 221-first side punching hole, 23-diverter part, 231-second main flow channel, 232-second cleaning flow channel, 233-second pulse flow channel, 3-rotating shell, 31-spiral shielding strip, 32-annular protrusion, 4-lower connecting terminal, 41-first main flow channel, 42-first cleaning flow channel, 43-first pulse flow channel, 44-connecting groove, 45-second side punching hole, 46-spring placement groove, 5-pulse generating mechanism, 51-plug body, 511-blocking block, 512-guide block, 513-arc notch, 52-elastic member. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0031] Please refer to Figure 1-Figure 7 , the present invention provides a multi-frequency carbon dioxide jet tool, including an upper connecting terminal 1, a flow dividing shell 2, a rotating shell 3, a lower connecting terminal 4 and a pulse generating mechanism 5;

[0032] The upper end of the upper connecting terminal 1 is used to connect the drill rod;

[0033] The flow splitting housing 2 includes an integrally formed connection portion 21 and a jet portion 22, wherein the connection portion 21 is fixedly connected to the lower end of the upper connection terminal 1, the inner cavity of the connection portion 21 is communicated with the inner cavity of the upper connection terminal 1, and the inner cavity of the jet portion 22 is communicated with the inner cavity of the connection portion 21, and a plurality of first side punching holes 221 are uniformly formed on the jet portion 22;

[0034] The rotating shell 3 is rotatably disposed on the connecting portion 21, and a plurality of spiral shielding strips 31 are fixed on the outer wall of the rotating shell 3, and each spiral shielding strip 31 is attached to the outer wall of the jet portion 22 and can block part of the first side punching hole 221;

[0035] The lower connecting terminal 4 is provided with a first main flow channel 41, a first cleaning flow channel 42 and a first pulse flow channel 43. The upper ends of the first main flow channel 41, the first cleaning flow channel 42 and the first pulse flow channel 43 are all connected to the inner cavity of the jet part 22. The lower end of the lower connecting terminal 4 is used to connect to the drill tool. The first main flow channel 41 is used to communicate with the inner cavity of the drill tool. The outer side wall of the lower connecting terminal 4 is provided with a second side punching hole 45 connected to the first cleaning flow channel 42. The lower end of the first pulse flow channel 43 is connected to the first main flow channel 41 via a connecting groove 44.

[0036] The pulse generating mechanism 5 includes a plug body 51 and an elastic member 52 . The plug body 51 is slidably disposed in the connecting groove 44 . One end of the elastic member 52 is connected to the inner wall of the first pulse channel 43 , and the other end of the elastic member 52 is connected to the plug body 51 .

[0037] When in use, the fluid containing carbon dioxide enters the upper connecting terminal 1 from the drill pipe, and then enters the connecting part 21 and the jet part 22 of the diversion shell 2. At this time, part of the fluid is ejected through the first side punching hole 221, and part of the first side punching hole 221 is covered by the spiral shielding strip 31, and the remaining fluid enters the lower connecting terminal 4. At this time, the fluid is divided into three paths. The first path of fluid enters the first cleaning channel 42, and is ejected to the wellbore annulus through the second side punching hole 45 and flows upward. When the upward-flowing fluid flow in the wellbore annulus passes through the spiral shielding strip 31, it will push the spiral shielding strip 31 to rotate, thereby driving the rotating shell 3 to rotate. The rotation of the spiral shielding strip 31 causes each first side punching hole 221 to open and close periodically, thereby generating a pulsed jet that is injected into the annulus, giving the jet greater kinetic energy. Thereby, the kinetic energy of the fluid in the annulus is increased, and its ability to entrain gravel is improved; the second fluid enters the first pulse flow channel 43, at which time the plug body 51 makes the connecting groove 44 appear to be in a closed state, and as the fluid continues to flow into the first pulse flow channel 43, the pressure increases, compressing the elastic member 52, causing the plug body 51 to move downward, and when the plug body 51 moves downward to the preset position, the connecting groove 44 opens, and the high-pressure fluid in the first pulse flow channel 43 is injected into the outlet of the first main flow channel 41, and the elastic member 52 rebounds, and then continues to store energy and then injects, and this cycle is repeated, continuously generating pulsed high-pressure jets that are injected into the outlet of the first main flow channel 41; the third fluid enters the first main flow channel 41, and after mixing with the high-pressure jet injected from the first pulse flow channel 43, enters the drilling tool, and is ejected from the spray hole of the drill bit to impact the bottom of the well and assist in rock breaking.

[0038] The technical solution provided by the present invention is to inject a pulsed jet into the annulus through the first side punch hole 221, so that the jet has greater kinetic energy, thereby increasing the kinetic energy of the fluid in the annulus and improving its ability to entrain gravel, thereby reducing the amount of gravel accumulated at the bottom of the well to improve drilling efficiency. At the same time, the jet injected into the annulus through the second side punch hole 45 causes the spiral shielding strip 31 to rotate, thereby realizing the periodic opening and closing of the first side punch hole 221, thereby increasing the impact force of the jet injected from the first side punch hole 221; in addition, by arranging a plug body 51 and an elastic member 52 in the first pulse flow channel 43, energy can be periodically stored in the first pulse flow channel 43 and the pulse jet can be injected into the outlet of the first main flow channel 41, and after mixing with the fluid normally injected in the first main flow channel 41, it enters the drilling tool and is injected from the spray hole of the drill bit to impact the bottom of the well, assist in rock breaking, and improve the rock breaking effect.

[0039] In order to realize the flow diversion function of the flow diversion housing 2, please refer to Figure 3 and Figure 4 In a preferred embodiment, the diverter shell 2 also includes a diverter portion 23, in which a second main flow channel 231, a second cleaning flow channel 232 and a second pulse flow channel 233 are opened, and the upper ends of the second main flow channel 231, the second cleaning flow channel 232 and the second pulse flow channel 233 are all connected to the inner cavity of the jet portion 22, the lower end of the second main flow channel 231 is connected to the upper end of the first main flow channel 41, the lower end of the second cleaning flow channel 232 is connected to the upper end of the first cleaning flow channel 42; the lower end of the second pulse flow channel 233 is connected to the upper end of the first pulse flow channel 43.

[0040] To improve the sand-carrying capacity of the fluid in the annulus, please refer to Figure 3 and Figure 4 In a preferred embodiment, the first side punch hole 221 and the second side punch hole 45 are both inclined upward from the inside to the outside, thereby providing kinetic energy for the fluid in the annulus to flow upward.

[0041] In order to realize the fixed connection between the upper connecting terminal 1 and the connecting portion 21, please refer to Figure 3 and Figure 4 In a preferred embodiment, a mounting portion 11 is formed at the lower end of the upper connecting terminal 1 , and the connecting portion 21 is fixedly inserted into the mounting portion 11 .

[0042] In order to realize the rotation of the rotating housing 3, please refer to Figure 3 and Figure 4 In a preferred embodiment, an annular groove is provided on the outer side wall of the mounting portion 11, the rotating shell 3 is sleeved on the mounting portion 11, and an annular protrusion 32 matching the annular groove is provided on the inner side wall of the rotating shell 3. The annular protrusion 32 is inserted into the annular groove, thereby only allowing the rotating shell 3 to rotate and not allowing it to be displaced along the length direction.

[0043] To specifically implement the installation of the elastic member 52, please refer to Figure 3-Figure 7 In a preferred embodiment, a spring placement groove 46 is also opened in the lower connecting terminal 4, and the elastic member 52 is built into the spring placement groove 46, one end of the elastic member 52 abuts against the plug body, and the other end of the elastic member abuts against the inner bottom wall of the spring placement groove 46.

[0044] In order to specifically realize the abutment between one end of the elastic member 52 and the plug body 51, please refer to Figure 3-Figure 7 In a preferred embodiment, a blocking block 511 is fixed on the plug body 51 , and the blocking block 511 abuts against one end of the elastic member 52 .

[0045] In order to improve the stability of the movement of the plug body 51, please refer to Figure 3-Figure 7 In a preferred embodiment, a plurality of guide blocks 512 are fixed on the plug body, and the guide blocks 512 are slidably disposed in the first pulse flow channel 43.

[0046] In order to further improve the stability of the movement of the plug body 51, please refer to Figure 6 In a preferred embodiment, the first pulse flow channel 43 is arc-shaped, and the plug body 51 and each of the guide blocks 512 are also arc-shaped, so that the plug body 51 can be prevented from lateral movement through the limiting effect of the arc.

[0047] In order to facilitate the fluid in the first pulse flow channel 43 to be ejected, please refer to Figure 3-Figure 7 In a preferred embodiment, the upper end of the plug body 51 has an arc-shaped notch 513. When the plug body 51 moves downward to connect the arc-shaped notch 513 with the first main flow channel 41, the fluid in the first pulse flow channel 43 flows from the arc-shaped notch 513 into the first main flow channel 41 to perform a jet.

[0048] In order to better understand the present invention, the following Figure 1-Figure 7 The working process of the multi-frequency carbon dioxide jet tool provided by the present invention is described in detail: when in use, the fluid containing carbon dioxide enters the upper connecting terminal 1 from the drill pipe, and then enters the connecting part 21 and the jetting part 22 of the diversion shell 2. At this time, part of the fluid is ejected through the first side punching hole 221, and part of the first side punching hole 221 is covered by the spiral shielding strip 31, and the remaining fluid enters the diversion part 23. At this time, the fluid is divided into three paths. The first path of fluid enters the second cleaning channel 232, and then enters the first cleaning channel 42, and is ejected to the wellbore annulus through the second side punching hole 45 and flows upward. When the upward-flowing fluid flow in the wellbore annulus passes through the spiral shielding strip 31, it will push the spiral shielding strip 31 to rotate, thereby driving the rotating shell 3 to rotate. The rotation of the spiral shielding strip 31 causes each first side punching hole 221 to open and close periodically, thereby generating a pulsed jet injection into the annulus, which makes the jet The flow has greater kinetic energy, thereby increasing the kinetic energy of the fluid in the annulus and improving its ability to entrain gravel; the second fluid enters the second pulse flow channel 233, and then enters the first pulse flow channel 43. At this time, the plug body 51 makes the connecting groove 44 appear to be in a closed state. As the fluid continues to flow into the first pulse flow channel 43, the pressure increases, compressing the elastic member 52, causing the plug body 51 to move downward. When the plug body 51 moves downward to the preset position, the connecting groove 44 opens, and the high-pressure fluid in the first pulse flow channel 43 is injected into the outlet of the first main flow channel 41. The elastic member 52 rebounds, and then continues to store energy and then injects it, and this cycle is repeated, continuously generating pulsed high-pressure jets that are injected into the outlet of the first main flow channel 41; the third fluid enters the second main flow channel 231, and then enters the first main flow channel 41, and after mixing with the high-pressure jet injected from the first pulse flow channel 43, enters the drilling tool, and is ejected from the spray hole of the drill bit to impact the bottom of the well and assist in rock breaking.

[0049] The technical solution provided by the present invention is to inject a pulsed jet into the annulus through the first side punch hole 221, so that the jet has greater kinetic energy, thereby increasing the kinetic energy of the fluid in the annulus and improving its ability to entrain gravel, thereby reducing the amount of gravel accumulated at the bottom of the well to improve drilling efficiency. At the same time, the jet injected into the annulus through the second side punch hole 45 causes the spiral shielding strip 31 to rotate, thereby realizing the periodic opening and closing of the first side punch hole 221, thereby increasing the impact force of the jet injected from the first side punch hole 221; in addition, by arranging a plug body 51 and an elastic member 52 in the first pulse flow channel 43, energy can be periodically stored in the first pulse flow channel 43 and the pulse jet can be injected into the outlet of the first main flow channel 41, and after mixing with the fluid normally injected in the first main flow channel 41, it enters the drilling tool and is injected from the spray hole of the drill bit to impact the bottom of the well, assist in rock breaking, and improve the rock breaking effect.

[0050] 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 changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A multi-frequency carbon dioxide jet tool, characterized in that, it includes an upper connection terminal, a flow splitting housing, a rotating housing, a lower connection terminal and a pulse generating mechanism; the upper end of the upper connection terminal is used to connect to a drill pipe; the flow splitting housing includes an integrally formed connection part and a jet part, the connection part is fixedly connected to the lower end of the upper connection terminal, the inner cavity of the connection part is communicated with the inner cavity of the upper connection terminal, the inner cavity of the jet part is communicated with the inner cavity of the connection part, and a plurality of first side punching holes are evenly arranged on the jet part; the rotating housing is rotatably arranged on the connection part, and a plurality of spiral shielding strips are fixed on the outer side wall of the rotating housing, and each spiral shielding strip fits on the outer side wall of the jet part and can block part of the first side punching holes; a first main flow channel, a first cleaning flow channel and a first pulse flow channel are arranged in the lower connection terminal, the upper ends of the first main flow channel, the first cleaning flow channel and the first pulse flow channel are all communicated with the inner cavity of the jet part, the lower end of the lower connection terminal is used to connect to a drilling tool, the first main flow channel is used to be communicated with the inner cavity of the drilling tool, a second side punching hole communicated with the first cleaning flow channel is arranged on the outer side wall of the lower connection terminal, and the lower end of the first pulse flow channel is communicated with the first main flow channel through a communication groove; the pulse generating mechanism includes a plug body and an elastic member, the plug body is slidably arranged in the communication groove, one end of the elastic member is connected to the inner wall of the first pulse flow channel, and the other end of the elastic member is connected to the plug body.

2. The multi-frequency carbon dioxide jet tool according to claim 1, characterized in that, the flow splitting housing further includes a flow splitting part, a second main flow channel, a second cleaning flow channel and a second pulse flow channel are arranged in the flow splitting part, the upper ends of the second main flow channel, the second cleaning flow channel and the second pulse flow channel are all communicated with the inner cavity of the jet part, the lower end of the second main flow channel is communicated with the upper end of the first main flow channel, and the lower end of the second cleaning flow channel is communicated with the upper end of the first cleaning flow channel; the lower end of the second pulse flow channel is communicated with the upper end of the first pulse flow channel.

3. The multi-frequency carbon dioxide jet tool according to claim 1, characterized in that, the first side punching holes and the second side punching holes are both inclined upward from inside to outside.

4. The multi-frequency carbon dioxide jet tool according to claim 1, characterized in that, an installation part is formed at the lower end of the upper connection terminal, and the connection part is fixedly inserted into the installation part.

5. The multi-frequency carbon dioxide jet tool according to claim 4, characterized in that, an annular groove is arranged on the outer side wall of the installation part, the rotating housing is sleeved on the installation part, an annular protrusion matched with the annular groove is arranged on the inner side wall of the rotating housing, and the annular protrusion is inserted into the annular groove.

6. The multi-frequency carbon dioxide jet tool according to claim 1, characterized in that, A spring placement groove is further formed in the lower connection terminal, the elastic member is disposed in the spring placement groove, one end of the elastic member abuts against the plug body, and the other end of the elastic member abuts against the inner bottom wall of the spring placement groove.

7. The multi-frequency carbon dioxide jet tool according to claim 6, wherein, a blocking block is fixed on the plug body, and the blocking block abuts against one end of the elastic member.

8. The multi-frequency carbon dioxide jet tool according to claim 1, wherein, a plurality of guiding blocks are fixed on the plug body, and the guiding blocks are slidably disposed in the first pulse flow channel.

9. The multi-frequency carbon dioxide jet tool according to claim 8, wherein, the first pulse flow channel is arc-shaped, and the plug body and each of the guiding blocks are also arc-shaped.

10. The multi-frequency carbon dioxide jet tool according to claim 1, wherein, the upper end of the plug body has an arc-shaped notch. When the plug body moves downward to make the arc-shaped notch communicate with the first main flow channel, the fluid in the first pulse flow channel flows into the first main flow channel from the arc-shaped notch.

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