LU504871B1 - Combined jet drill bit for exploring non-diagenetic hydrate - Google Patents
Combined jet drill bit for exploring non-diagenetic hydrate Download PDFInfo
- Publication number
- LU504871B1 LU504871B1 LU504871A LU504871A LU504871B1 LU 504871 B1 LU504871 B1 LU 504871B1 LU 504871 A LU504871 A LU 504871A LU 504871 A LU504871 A LU 504871A LU 504871 B1 LU504871 B1 LU 504871B1
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- Luxembourg
- Prior art keywords
- cylinder
- rotating shell
- drill bit
- central
- equal intervals
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- 230000036346 tooth eruption Effects 0.000 claims description 9
- 239000012530 fluid Substances 0.000 description 15
- 230000009286 beneficial effect Effects 0.000 description 10
- 239000011435 rock Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention belongs to the technical field of hydrate exploitation, in particular to a combined jet drill bit for exploring non-diagenetic hydrate, comprising: a drill bit body, comprising a first cylinder, a second cylinder with different diameters which are fixedly connected, the end of the first cylinder is provided with a central nozzle; a plurality of obliquely arranged first-stage backward nozzles are arranged on the side wall of the first cylinder at equal intervals; a diverter valve arranged in the inner cavity of the second column; a rotating shell fixedly connected with the end face of the first column and covered on the second column position, wherein the inner cavity of the second column is communicated with the inner cavity of the rotating shell, the central nozzle extends out of the rotating shell; a plurality of obliquely arranged secondary backward nozzles are arranged on the rotating shell at equal intervals.
Description
DESCRIPTION LU504871
COMBINED JET DRILL BIT FOR EXPLORING NON-DIAGENETIC HYDRATE
The invention belongs to the technical field of hydrate exploitation, in particular to a combined jet drill bit for exploring non-diagenetic hydrate.
Jet drill bit is the core equipment of hydraulic jet radial horizontal well drilling and production technology. However, although the existing jet drill bit can drill in the reservoir, there are still the following important problems to be solved urgently: (1) the jet energy is underutilized, the rock crushing efficiency is low, and the rate of penetration (ROP) is low; (2) the hole diameter is small, the hole is irregular, and the hole trajectory cannot be controlled; (3) the extension distance of the branch borehole is short, and it cannot reach the design length.
Therefore, this application designs a combined jet drill bit for exploring non-diagenetic hydrate to solve the above technical problems.
SUMMARY LU504871
In order to solve the above technical problems, the invention provides a combined jet drill bit for non-diagenetic hydrate exploitation.
In order to achieve the above purpose, the present invention provides a combined jet drill bit for exploring non-diagenetic hydrate, including:
A combined jet drill bit for exploring non-diagenetic hydrate comprises: a drill bit body, comprising a first cylinder and a second cylinder with different diameters which are fixedly connected, and the end of the first cylinder is provided with a central nozzle; a plurality of obliquely arranged first-stage backward nozzles are arranged on the side wall of the first cylinder at equal intervals; a diverter valve arranged in the inner cavity of the second column; a rotating shell fixedly connected with the end face of the first column and covered on the second column position, wherein the inner cavity of the second column is communicated with the inner cavity of the rotating shell, and the central nozzle extends out of the rotating shell; a plurality of obliquely arranged secondary backward nozzles are arranged on the outer wall of the rotating shell at equal intervals; a reaming assembly, comprising a plurality of cutting ribs obliquely arranged on the outer wall of the rotating shell at equal intervals, and the secondary backward nozzle is arranged at intervals with the cutting ribs.
Optionally, a plurality of forward holes arranged at equal intervals penetrate through the side wall of the second cylinder, and the forward holes are obliquely arranged to the side far away from the first cylinder.
Optionally, a central hole runs through the end face of the rotating shell far away from the first cylinder, and the central nozzle extends out of the rotating shell from the central hole and is fixedly sealed with the central hole.
Optionally, the end face of the rotating shell far from the first cylinder is provided with a plurality of obliquely arranged forward nozzles, and the forward nozzles are distributed around the central hole at equal intervals.
Optionally, the end face of the cutting wing rib far from the rotating shell is provided/504871 with a plurality of cemented carbide cutting teeth.
Optionally, the diverter valve is provided with a central diversion hole and a plurality of bypass diversion holes, and one end of the diverter valve facing the central nozzle is provided with a diversion blade.
Compared with the prior art, the invention has the following advantages and technical effects: high-pressure fluid enters the drill bit body and is sprayed by the first-stage backward nozzle and the central nozzle respectively, and simultaneously enters the inner cavity of the rotating shell and is sprayed by the second backward nozzle, and the fluids sprayed by the first-stage backward nozzle and the second-stage backward nozzle provide self-propulsion for the drill bit, so that the jet drill bit is pushed to drill in the stratum, and at the same time, the diameter of the borehole is enlarged, which is beneficial to improving the extension length of the borehole; under the action of the diverter valve, the fluid entering the central nozzle forms a straight-rotating combined jet to form a larger hole diameter and depth; the cutting wing rib plays a stable supporting role, which is beneficial to the control of wellbore trajectory. After rotation, the cemented carbide cutting teeth on it can chip the rocks around the wellbore, which is beneficial to borehole enlargement and borehole regularity, and reduces the friction resistance of the bit.
The invention has simple structure, few components, ensures the reliability of tools, can form a borehole with larger depth and diameter, improves the drilling efficiency at the same time, and is beneficial to the formation of regular boreholes.
BRIEF DESCRIPTION OF THE FIGURES LU504871
The accompanying drawings, which constitute a part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application, and do not constitute an improper limitation of this application. In the attached drawings:
Fig. 1 is a schematic structural diagram of the present invention;
Fig. 2 is a three-dimensional schematic diagram of the drill bit body of the present invention:
Fig. 3 is a three-dimensional schematic diagram of the rotating shell of the present invention:
Fig. 4 is a three-dimensional schematic diagram of the diverter valve of the present invention:
Fig. 5 is a schematic view of the rear end of the diverter valve of the present invention:
Fig. 6 is a top view of the diversion blade of the flow valve of the present invention; 1. Bit body; 2. Rotating shell; 3. Positioning nut; 11. First-stage backward nozzle; 12.
Annular protrusion; 13. Forward hole; 14. Diverter valve; 15. Division blade; 16. Bypass diversion hole; 17. Central nozzle; 18. Toothed slip ring combined seal; 19. Central diversion hole; 21. Cutting wing ribs; 22. Cemented carbide cutting teeth; 23. Secondary backward nozzle; 24. Forward nozzle; 25. Central hole; 26. Annular groove.
DESCRIPTION OF THE INVENTION LU504871
In the following, the technical scheme in the embodiment of the invention will be clearly and completely described with reference to the attached drawings. Obviously, the described embodiment is only a part of the embodiment of the invention, but not the whole embodiment. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative labor belong to the scope of protection of the present invention.
In order to make the above objects, features and advantages of the present invention more obvious and easier to understand, the present invention will be further described in detail with the attached drawings and specific embodiments.
Referring to figs. 1-6, this embodiment provides a combined jet drill bit for exploring non-diagenetic hydrate, comprising: a drill bit body, comprising a first cylinder and a second cylinder with different diameters which are fixedly connected, and the end of the first cylinder is provided with a central nozzle 17; a plurality of obliquely arranged first-stage backward nozzles 11 are arranged on the side wall of the first cylinder at equal intervals; a diverter valve 14 arranged in the inner cavity of the second column; a rotating shell 2 fixedly connected with the end face of the first column and covered on the second column position, wherein the inner cavity of the second column is communicated with the inner cavity of the rotating shell 2, and the central nozzle 17 extends out of the rotating shell 2; a plurality of obliquely arranged secondary backward nozzles 23 are arranged on the outer wall of the rotating shell 2 at equal intervals; a reaming assembly, comprising a plurality of cutting ribs 21 obliquely arranged on the outer wall of the rotating shell 2 at equal intervals, and the secondary backward nozzle 23 is arranged at intervals with the cutting ribs 21.
High-pressure fluid enters the drill bit body 1 and is sprayed by the first-stage backward nozzle 11 and the central nozzle 17 respectively, and simultaneously enters the inner cavity of the rotary shell 2 and is sprayed by the second backward nozzle.
The fluids sprayed by the first-stage backward nozzle 11 and the second-stagé&/504871 backward nozzle 23 provide self-propulsion for the drill bit, which pushes the jet drill bit to drill in the stratum, and at the same time enlarges the diameter of the borehole, which is beneficial to improving the extension length of the borehole. The fluid entering the central nozzle 17 forms a straight-rotating combined jet with a larger hole diameter and depth under the action of the diverter valve 14; the cutting wing rib 21 plays a role of stable support, which is beneficial to the control of the well trajectory. After rotation, the cemented carbide cutting teeth 22 on it can chip the rocks around the well bore, which is beneficial to the enlargement of the well bore and the regularity of the well bore, and reduces the friction resistance of the drill bit.
Further, in this embodiment, there are four first-stage backward nozzles 11, which form an included angle of 10-40 degrees with the axis of the first cylinder, and the diameter is 2-6 mm. The water outlets of the first-stage backward nozzles 11 are located on the same cross section of the first cylinder, and the jets are ejected from the first-stage backward nozzles 11 to provide self-propelling force for the drill bit and enlarge the borehole.
Further, a plurality of forward holes 13 arranged at equal intervals penetrate through the side wall of the second cylinder, and the forward holes 13 are obliquely arranged to the side far away from the first cylinder. In this embodiment, four forward holes 13 are provided to provide a flow channel for fluid to enter the rotating shell 2.
Further, a central hole 25 runs through the end face of the rotating shell 2 far away from the first cylinder, and the central nozzle 17 extends out of the rotating shell 2 from the central hole 25 and is fixedly sealed with the central hole 25. The outlet end of the central nozzle 17 protrudes from the central hole 25 and is hermetically combined with the central hole hole; The outlet section of the central nozzle 17 is externally threaded, locked and positioned by the positioning nut 3 and fixed with the rotating shell 2.
Further, the end face of the rotating shell 2 far from the first cylinder is provided with a plurality of obliquely arranged forward nozzles 24, and the forward nozzles 24 are distributed around the central hole 25 at equal intervals.
In this embodiment, three forward nozzles 24 are arranged at equal intervals arourldJ504871 the central hole 25, with the direction facing the front side and the diameter of 2 mm-6 mm. The jet formed by the high-pressure jet passing through the forward nozzles 24 has three-dimensional velocity, and the tangential velocity component of the jet is beneficial to rock breaking. At the same time, the jet recoil force acts on the rotating shell 2, making the rotating shell 2 rotate.
Further, the end face of the cutting wing rib 21 far from the rotating shell 2 is provided with a plurality of cemented carbide cutting teeth 22. In this embodiment, the number of cutting ribs 21 is set to four and arranged on the outer wall of the rotating housing 2 at equal intervals, and the helix angle of the cutting ribs 21 is 18°-30°. The surface of the cutting ribs 21 is provided with cemented carbide cutting teeth 22, and the rotating housing 2 rotates, so that the cemented carbide cutting teeth 22 on the cutting ribs 21 continuously cut the borehole wall rock, thereby enlarging the borehole diameter and forming a more regular borehole.
Further, in this embodiment, four secondary backward nozzles 23 are arranged in the guide grooves between adjacent cutting ribs 21, which form an included angle of 10-40 degrees with the axis of the rotating housing 2, with a diameter of 2-6 mm. The included angle between the second-stage backward nozzle 23 and the axis of the drill bit body 1 is smaller than that between the first-stage backward nozzle 11 and the axis of the drill bit body 1. The water outlet of the second-stage backward nozzle 23 is located on the same cross section of the rotating housing 2, and the jet from the second-stage backward nozzle 23 provides self-propulsion for the drill bit and enlarges the borehole.
Further, the end face of the first cylinder is provided with a plurality of annular protrusions 12 arranged around the second cylinder, and the end face of the rotating housing 2 is provided with an annular groove 26 adapted to the annular protrusions 12, and the annular protrusions 12 are inserted into the annular grooves 26 in a sealing fit.
Further, the diverter valve 14 is provided with a central diversion hole 19 and a plurality of bypass diversion holes 16, and one end of the diverter valve 14 facing the central nozzle 17 is provided with a diversion blade 15.
A central diversion hole 19 and a bypass diversion hole 16 are arranged at the reät504871 end of the diverter valve 14, and a diversion blade 15 is arranged at one end of the diverter valve 14 facing the central nozzle 17. The diversion blade 15 adopts a tangential guide flow mode, and high-pressure fluid enters the central nozzle 17 with a mixing cavity through the diverter valve to form a straight-rotating combined jet, which is beneficial to the formation of a borehole with a larger depth and size.
Further, the end of the first cylinder far from the second cylinder is threaded and connected with the high-pressure hose.
The usage method is as follows:
In the process of exploiting non-diagenetic hydrate in radial horizontal well, high-pressure fluid enters the bit body 1 through high-pressure hose, and is ejected from the first-stage backward nozzle 11, the forward hole 13 and the central nozzle 17 respectively. The fluid ejected from the first-stage backward nozzle 11 provides self-propelled force for the drill bit and pushes the jet drill bit to drill in the stratum. The fluid ejected from the central nozzle 17 forms a straight combined jet under the action of the central diversion hole 19, the bypass guide hole 16 and the tangential diversion blade 15 of the diverter valve 14. The straight combined jet has the advantages of a straight jet and a rotating jet, and can form a larger hole diameter and depth. The fluid ejected from the forward hole 13 enters the interior of the rotating shell 2, and the fluid that enters the rotating shell 2 is ejected from the secondary backward nozzle 23 and the forward hole 13 respectively. The fluid ejected from the secondary backward nozzle 23 provides self-propelling force for the drill bit and enlarges the borehole diameter at the same time. The tangential velocity of the fluid ejected from the forward hole 13 is beneficial to rock breaking and improve the ROP. At the same time, the jet recoil force can provide torque for the rotating shell 2, so that the rotating shell 2 rotates around its own axis, thereby rotating the cutting wing ribs 21 arranged on the outer wall of the rotating shell 2, and the cemented carbide cutting teeth 22 arranged on the cutting wing ribs 21 continuously cut the borehole wall rock, thereby expanding the borehole diameter and forming a more regular and smoother borehole.
In addition, the rotation of the rotating shell 2 can increase the stability of the drill Bit/504871 and ensure the controllability of the well trajectory.
The above-mentioned embodiments only describe the preferred mode of the invention, and do not limit the scope of the invention. Under the premise of not departing from the design spirit of the invention, various modifications and improvements made by ordinary technicians in the field to the technical scheme of the invention shall fall within the protection scope determined by the claims of the invention.
Claims (6)
1. A combined jet drill bit for exploring non-diagenetic hydrate, comprising: a drill bit body, comprising a first cylinder and a second cylinder with different diameters which are fixedly connected, wherein the end of the first cylinder is provided with a central nozzle (17); a plurality of obliquely arranged first-stage backward nozzles (11) are arranged on the side wall of the first cylinder at equal intervals; a diverter valve (14) arranged in the inner cavity of the second column; a rotating shell (2) fixedly connected with the end face of the first column and covered on the second column position, wherein the inner cavity of the second column is communicated with the inner cavity of the rotating shell (2), and the central nozzle (17) extends out of the rotating shell (2); a plurality of obliquely arranged secondary backward nozzles (23) are arranged on the outer wall of the rotating shell (2) at equal intervals; a reaming assembly, comprising a plurality of cutting wing ribs (21) obliquely arranged on the outer wall of the rotating shell (2) at equal intervals, wherein the secondary backward nozzle (23) is arranged at intervals with the cutting wing ribs (21).
2. The combined jet drill bit for exploring non-diagenetic hydrate according to claim 1, wherein a plurality of forward holes (13) arranged at equal intervals penetrate through the side wall of the second cylinder, and the forward holes (13) are obliquely arranged to the side far away from the first cylinder.
3. The combined jet drill bit for exploring non-diagenetic hydrate according to claim 1, wherein a central hole (25) runs through the end face of the rotating shell (2) far away from the first cylinder, and the central nozzle (17) extends out of the rotating shell (2) from the central hole (25) and is fixedly sealed with the central hole (25).
4. The combined jet drill bit for exploring non-diagenetic hydrate according to claibtJ504871 3, wherein the end face of the rotating shell (2) far from the first cylinder is provided with a plurality of obliquely arranged forward nozzles (24), and the forward nozzles (24) are distributed around the central hole (25) at equal intervals.
5. The combined jet drill bit for exploring non-diagenetic hydrate according to claim 1, wherein the end face of the cutting wing rib (21) far from the rotating shell (2) is provided with a plurality of cemented carbide cutting teeth (22).
6. The combined jet drill bit for exploring non-diagenetic hydrate according to claim 1, wherein the diverter valve (14) is provided with a central diversion hole (19) and a plurality of bypass diversion holes (16), and one end of the diverter valve (14) facing the central nozzle (17) is provided with a diversion blade (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU504871A LU504871B1 (en) | 2023-08-07 | 2023-08-07 | Combined jet drill bit for exploring non-diagenetic hydrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU504871A LU504871B1 (en) | 2023-08-07 | 2023-08-07 | Combined jet drill bit for exploring non-diagenetic hydrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU504871B1 true LU504871B1 (en) | 2024-02-08 |
Family
ID=89942786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU504871A LU504871B1 (en) | 2023-08-07 | 2023-08-07 | Combined jet drill bit for exploring non-diagenetic hydrate |
Country Status (1)
| Country | Link |
|---|---|
| LU (1) | LU504871B1 (en) |
-
2023
- 2023-08-07 LU LU504871A patent/LU504871B1/en active IP Right Grant
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG | Patent granted |
Effective date: 20240208 |