CN116927659A - Downhole tool for solving stuck drill and unstable borehole - Google Patents
Downhole tool for solving stuck drill and unstable borehole Download PDFInfo
- Publication number
- CN116927659A CN116927659A CN202210374253.XA CN202210374253A CN116927659A CN 116927659 A CN116927659 A CN 116927659A CN 202210374253 A CN202210374253 A CN 202210374253A CN 116927659 A CN116927659 A CN 116927659A
- Authority
- CN
- China
- Prior art keywords
- cutting
- stuck
- teeth
- resolving
- downhole tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 55
- 230000036346 tooth eruption Effects 0.000 claims abstract description 23
- 230000007704 transition Effects 0.000 claims abstract description 11
- 229910003460 diamond Inorganic materials 0.000 claims description 10
- 239000010432 diamond Substances 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims 2
- 238000005553 drilling Methods 0.000 abstract description 20
- 239000000956 alloy Substances 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000003466 welding 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
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
-
- 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
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The application relates to an underground tool for solving the problem of stuck drilling and borehole instability, which comprises a tool body, wherein a plurality of cutting ribs are vertically or spirally distributed along the axial direction of the tool body, chip removal channels are formed between adjacent cutting ribs, cutting blades are formed on two sides of the cutting ribs along the axial direction, a plurality of cutting teeth are arranged on the lip surfaces of the blades, a plurality of gauge protection teeth are fixedly arranged on the surfaces of the cutting ribs between the lip surfaces of the two sides, a slope transition structure is formed at the joint of two ends of the cutting ribs and the tool body, and a plurality of anti-stuck teeth are fixedly arranged on the surfaces of the slope transition structure; the application can effectively reduce the treatment time of underground complex conditions, improve the durability of long-distance drilling and the stability of the well wall, and form a smooth well bore which can be directly used for well completion without single reaming.
Description
Technical Field
The application belongs to the technical field of drilling apparatuses, and particularly relates to a downhole tool for solving the problem of stuck drilling and unstable well bore.
Background
In well sections with similar plasticity, looseness, severe formation interaction and the like, especially in long horizontal section drilling, non-production time is often caused to solve the problems of stuck drilling and other well instability, the drilling period and the production development progress are seriously influenced, and well completion and production are required to be subjected to well drilling and then reaming so as to reduce the problems of well bending, diameter shrinkage and the like, which increases the drilling cost.
Disclosure of Invention
The application solves the technical problems by adopting the following technical scheme:
the utility model provides a solve and block and unstable downhole tool of boring and borehole, includes the instrument body, follows instrument body axial is vertical or spiral distributes has a plurality of cutting ribs, forms the chip removal passageway between the adjacent cutting rib, cutting rib forms the cutting blade along axial both sides, install a plurality of cutting teeth on the blade lip face, both sides cutting rib surface fixed mounting a plurality of gage teeth between the blade lip face, cutting rib both ends with instrument body junction forms slope transition structure, a plurality of anti-sticking teeth of slope transition structure surface fixed mounting.
And two ends of the blade form a conical structure along the slope transition structure, and a plurality of pairs of cutting teeth are arranged on the lip surface of the blade of the conical structure.
Furthermore, a plurality of cutting tooth grooves are formed in the blade lip surface, and the cutting teeth are fixedly arranged in the cutting tooth grooves.
Further, the outermost side of the cutting rib on the tool body ring is not the same as the vertical distance formed at the axis of the tool body.
Further, the vertical distance between the outermost side of the cutting rib on the tool body ring and the axial center of the tool body is sequentially increased.
Further, the cutting ribs on the tool body ring are divided into a plurality of groups, the vertical distance between the outermost side of each group and the axis of the tool body is increased in sequence, and the cutting ribs of each group are mutually adjacent.
Further, the top of the anti-sticking tooth is in a pointed cone shape, and a polycrystalline diamond layer is sintered on the surface of the pointed cone.
Further, the gauge teeth are cylinders, and a polycrystalline diamond layer is sintered at the tops of the cylinders.
Further, PDC cutting teeth are adopted for the cutting teeth and the auxiliary cutting teeth.
The application has the advantages and positive effects that:
the application can effectively reduce the treatment time of underground complex conditions, improve the durability of long-distance drilling and the stability of the well wall, and form a smooth well bore which can be directly used for well completion without single reaming.
Drawings
The technical solution of the present application will be described in further detail below with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for the purpose of illustration only and thus are not limiting the scope of the present application. Moreover, unless specifically indicated otherwise, the drawings are intended to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of a downhole tool for resolving stuck and wellbore instability according to an embodiment of the present application;
FIG. 2 is a cross-sectional view of a downhole tool for resolving stuck and wellbore instabilities, as provided in an embodiment of the application;
FIG. 3 is a top view of a downhole tool configured to address stuck and wellbore instability in accordance with an embodiment of the present application;
Detailed Description
First, it should be noted that the following detailed description of the specific structure, characteristics, advantages, and the like of the present application will be given by way of example, however, all descriptions are merely illustrative, and should not be construed as limiting the present application in any way. Furthermore, any single feature described or implicit in the embodiments referred to herein may still be combined or truncated in any way between such features (or equivalents thereof) to obtain still further embodiments of the application that may not be directly referred to herein.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and the terms "comprising" and "having" and any variation thereof are intended to cover a non-exclusive inclusion, e.g., a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
Examples
As shown in fig. 1, 2 and 3, this embodiment provides a downhole tool for solving the problem of stuck drilling and borehole instability, which comprises a tool body 1, a plurality of cutting ribs 10 are vertically or spirally distributed along the axial direction of the tool body 1, chip removal channels 7 are formed between adjacent cutting ribs, cutting ribs form cutting blades 11 along the axial two sides, a plurality of cutting teeth 5 are installed on the blade lip surfaces, a plurality of gauge teeth 6 are fixedly installed on the cutting rib surfaces between the blade lip surfaces on the two sides, a slope transition structure 4 is formed at the joint of two ends of the cutting ribs and the tool body, and a plurality of anti-sticking teeth 2 are fixedly installed on the surface of the slope transition structure.
Two ends of the blade form a conical structure along the slope transition structure, and a plurality of pairs of cutting teeth 3 are arranged on the lip surface of the blade of the conical structure; the conical structure and the auxiliary cutting teeth 3 can provide active and passive cutting capability, and become active cutting when unstable well wall conditions occur so as to form a smooth well bore which meets regulations;
a plurality of cutting tooth grooves are formed in the blade lip surface, and the cutting teeth are fixedly arranged in the cutting tooth grooves; in the production of the tool, it is conceivable to mill a cutting tooth slot of the same diameter as the cutting tooth on the blade, and to weld the cutting tooth in the slot by welding.
The outermost side of the cutting rib on the tool body ring is different from the vertical distance formed at the axis of the tool body; further, it is considered that the vertical distance between the outermost side of the cutting rib in the tool body ring direction and the axial center of the tool body increases in order; or, the cutting ribs on the ring of the tool body are divided into a plurality of groups, the vertical distance between the outermost side of each group and the axis of the tool body is sequentially increased, and the cutting ribs of each group are mutually adjacent; by way of example, in the present embodiment, as shown in fig. 3, the tool body is cylindrical in shape, the number of cutting ribs is 4, and the cutting ribs are divided into two groups, and the outer diameters of the two groups of cutting ribs are different, such as a group of first cutting ribs 9 and a group of second cutting ribs 8, because: the design can enable the tool to have a certain capability of micro-enlarging the borehole when in use (rotation), can prevent the borehole from being complicated caused by the shrinkage working condition of the drilled section, and particularly, when the tool rotates in use, the tool can have a certain effect of micro-enlarging the borehole, so that the shrinkage of the borehole section can be eliminated (namely, the borehole diameter is reduced due to stratum reasons, such as 311.2 mm of the diameter of a drill bit, the drilled borehole is also required to be 311.2 mm, but due to stratum reasons, the borehole is reduced to 309 mm, and can be restored to 311.2 mm again due to the micro-reaming effect of the tool), and the borehole complicated working condition of the drilling meeting a card can be avoided.
The anti-sticking tooth comprises a polycrystalline diamond layer and a hard alloy matrix, the polycrystalline diamond layer and the hard alloy matrix are sintered into a whole at high temperature and high pressure, the lower part of the anti-sticking tooth is a hard alloy cylinder, the upper part of the anti-sticking tooth is a pointed cone, the polycrystalline diamond layer is sintered on the surface of the pointed cone, the blocking phenomenon caused by blocking of a well wall can be prevented, and the blocking condition of a tool can be reduced.
The gauge protection teeth comprise a polycrystalline diamond layer and a hard alloy matrix, and the polycrystalline diamond layer and the hard alloy matrix are sintered into a whole at high temperature and high pressure. The gauge teeth are cylinders, and the polycrystalline diamond layer is sintered at one end of the top of the cylinders, so that the outer diameter scraping capability of the tool can be enhanced, and the lower torque and resistance of the tool are ensured; the radial-tooth-protecting function is to balance radial vibration load generated at the bottom of the well by the tool, effectively reduce abrasion of the well wall to the surface of the blade of the tool, and enhance the abrasion resistance and stability of the blade, thereby protecting the outer diameter of the cutting rib of the tool.
The cutting teeth 5 and the auxiliary cutting teeth 3 can adopt PDC cutting teeth which can cut stratum, and the well wall is repaired secondarily to eliminate irregular well sections.
In addition, the chip removal channel formed between the adjacent cutting ribs ensures the clearance area so as to ensure the optimal well wall contact, prevent tool balling and improve the stability during drilling.
For example, during the working, drilling usually takes a lot of back-reaming operation time due to the problem of borehole quality, such as the problem of irregular borehole wall like borehole spiral, which often causes excessive directional friction and slight bearing pressure, and meanwhile, during the process of drilling, the situation of hanging cards is also generated, so that a lot of back-reaming and hanging card processing time is consumed; the tool of the application can be placed at the upper part of a drill bit in drilling operation, and can cut and scrape the well wall again along with the rotation of the drill (the drilling of the drill bit is regarded as scraping the well wall for the first time), thereby obtaining a smooth and unimpeded well hole and reducing the risks of complex downhole such as sticking.
In summary, the anti-seize tool of the application adopts a blade symmetrical structure, PDC cutting teeth participate in cutting stratum in real time, and secondary trimming is carried out on the well wall, thus eliminating irregular well sections. Meanwhile, the special force balance design is provided (it is to be noted that the cutting teeth are distributed through the force balance optimization design, and different relief angles and side inclination angles are distributed so that the load and abrasion of the cutting teeth are more uniform, the drilling efficiency and the service life of the teeth can be effectively improved), and more drilling pressure can be transmitted to the drill bit compared with any traditional BHA; by combining with hydraulic optimization calculation, stable well track and higher mechanical drilling rate ROP can be maintained all the time, and the jamming prevention tool can form a smooth and unobstructed well, so that the jamming risk can be greatly reduced.
The foregoing examples illustrate the application in detail, but are merely preferred embodiments of the application and are not to be construed as limiting the scope of the application. All equivalent changes and modifications within the scope of the present application are intended to be covered by the present application.
Claims (9)
1. A downhole tool for resolving stuck and wellbore instability, comprising: including the instrument body, follow the vertical or spiral distribution of instrument body axial has a plurality of cutting ribs, forms the chip removal passageway between the adjacent cutting rib, the cutting rib forms the cutting blade along axial both sides, install a plurality of cutting teeth on the blade lip face, both sides a plurality of gage teeth of cutting rib fixed surface installation between the blade lip face, cutting rib both ends with instrument body junction forms slope transition structure, a plurality of anti-sticking teeth of slope transition structure fixed surface installation.
2. A downhole tool for resolving stuck and unstable well bore according to claim 1, wherein: and two ends of the blade form a conical structure along the slope transition structure, and a plurality of pairs of cutting teeth are arranged on the lip surface of the blade of the conical structure.
3. A downhole tool for resolving stuck and unstable well bore according to claim 1, wherein: the blade lip surface is provided with a plurality of cutting tooth grooves, and the cutting teeth are fixedly arranged in the cutting tooth grooves.
4. A downhole tool for resolving stuck and unstable well bore according to claim 1, wherein: the outermost side of the cutting rib on the tool body ring is different from the vertical distance formed at the axis of the tool body.
5. A downhole tool for resolving stuck and unstable well bore according to claim 1, wherein: the vertical distance between the outermost side of the cutting rib on the tool body ring and the axial center of the tool body is sequentially increased.
6. A downhole tool for resolving stuck and unstable well bore according to claim 1, wherein: the cutting ribs on the tool body ring are divided into a plurality of groups, the vertical distance between the outermost side of each group and the axis of the tool body is increased in sequence, and the cutting ribs of each group are mutually adjacent.
7. A downhole tool for resolving stuck and unstable well bore according to claim 1, wherein: the top of the anti-sticking tooth is in a pointed cone shape, and a polycrystalline diamond layer is sintered on the surface of the pointed cone.
8. A downhole tool for resolving stuck and unstable well bore according to claim 1, wherein: the gauge teeth are cylinders, and a polycrystalline diamond layer is sintered at the tops of the cylinders.
9. A downhole tool for resolving stuck and unstable well bore according to claim 1, wherein: and the cutting teeth and the auxiliary cutting teeth are PDC cutting teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210374253.XA CN116927659A (en) | 2022-04-11 | 2022-04-11 | Downhole tool for solving stuck drill and unstable borehole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210374253.XA CN116927659A (en) | 2022-04-11 | 2022-04-11 | Downhole tool for solving stuck drill and unstable borehole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116927659A true CN116927659A (en) | 2023-10-24 |
Family
ID=88388370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210374253.XA Pending CN116927659A (en) | 2022-04-11 | 2022-04-11 | Downhole tool for solving stuck drill and unstable borehole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116927659A (en) |
-
2022
- 2022-04-11 CN CN202210374253.XA patent/CN116927659A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6390210B1 (en) | Rolling cone bit with gage and off-gage cutter elements positioned to separate sidewall and bottom hole cutting duty | |
| US8672060B2 (en) | High shear roller cone drill bits | |
| US9033069B2 (en) | High-shear roller cone and PDC hybrid bit | |
| CN1755061B (en) | Roller cone drill bits with optimized bearing structure | |
| US8127863B2 (en) | Drill bit having enhanced stabilization features and method of use thereof | |
| CN103080458B (en) | There is the drill bit that anti-drill bit follows old groove structure | |
| USRE34526E (en) | Two cone bit with non-opposite cones | |
| CA2563188C (en) | Drill bit and cutter element having aggressive leading side | |
| US20080164069A1 (en) | Drill Bit and Cutter Element Having Chisel Crest With Protruding Pilot Portion | |
| AU781290B2 (en) | Rolling cone bit with elements fanned along the gage curve | |
| US20160348440A1 (en) | Hybrid drill bit | |
| US8316968B2 (en) | Rolling cone drill bit having sharp cutting elements in a zone of interest | |
| CN114402115A (en) | Hybrid drill bit | |
| CN210289637U (en) | High anticollision PDC drill bit | |
| CN116927659A (en) | Downhole tool for solving stuck drill and unstable borehole | |
| US8579051B2 (en) | Anti-tracking spear points for earth-boring drill bits | |
| CN101025076A (en) | Roller cone drill bit with enhanced debris diverter grooves | |
| US9074431B2 (en) | Rolling cone drill bit having high density cutting elements | |
| US20180328116A1 (en) | Drag bit with wear-resistant cylindrical cutting structure | |
| GB2349405A (en) | Rolling cone bit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |