AU2020102875A4 - Recyclable Fishbone Stimulation Tool - Google Patents
Recyclable Fishbone Stimulation Tool Download PDFInfo
- Publication number
- AU2020102875A4 AU2020102875A4 AU2020102875A AU2020102875A AU2020102875A4 AU 2020102875 A4 AU2020102875 A4 AU 2020102875A4 AU 2020102875 A AU2020102875 A AU 2020102875A AU 2020102875 A AU2020102875 A AU 2020102875A AU 2020102875 A4 AU2020102875 A4 AU 2020102875A4
- Authority
- AU
- Australia
- Prior art keywords
- shell
- tool
- drill rod
- recyclable
- fishbone
- 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.)
- Ceased
Links
- 230000000638 stimulation Effects 0.000 title claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 37
- 238000005553 drilling Methods 0.000 claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims description 29
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 6
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 239000003208 petroleum Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002028 premature Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000126 substance Substances 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0035—Apparatus or methods for multilateral well technology, e.g. for the completion of or workover on wells with one or more lateral branches
Landscapes
- 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 discloses a recyclable fishbone stimulation tool, which comprises a shell, a
firstjoint and a secondjoint arranged at two ends of the shell and a sealing cylinder, a flexible
drill rod and a power device arranged in the shell; the first joint and the second joint are in
threaded connection with the shell through a conventional drill rod; wherein the sealing
cylinder is limited in the shell through a pin and in clearance fit with shell; and one end of the
flexible drill rod extends out of the shell and is provided with a drill bit, and the other end of
the flexible drill rod is rotationally connected with the power device. The tool can replace two
operation processes of perforation and fracturing in an alternative completion process; all
operation procedures can be completed at one time, the operation can be completed only by
adoption of the original drilling tool without adding other auxiliary equipment, and the tool has
the characteristics of simple operation procedure, short operation time and obvious operation
signal; the drilling hydraulic pressure drop is adopted as the operation completion signal of the
tool, and no other equipment is required to be added for monitoring; and the tool is completely
recyclable, so that the tool has great economic value and popularization value.
Figures
2 ! 3 5 6 7 8 9 10 11
Figure 1
Figure 2
Description
Figures
2! 3 5 6 7 8 9 10 11
Figure 1
Figure 2
Recyclable Fishbone Stimulation Tool
The invention relates to the technical field of petroleum and natural gas drilling tools, in particular to a recyclable fishbone stimulation tool.
As an emerging multi-branch drilling technique, fishbone stimulation technology is commonly used to replace both perforating and fracturing operations during alternative completion stage. Compared with perforating and fracturing operations, the recyclable fishbone stimulation tool provided by the invention can provide larger petroleum/gas production diameter, larger petroleum and gas flow area, and better and more purposely improve the characteristics of reservoir heterogeneity, natural fracture and high porosity/high permeability. Meanwhile, the fracturing fluid used in fracturing operation may cause the fracturing fluid to leak into the underground water body, resulting in pollution, and a higher risk of adoption of high explosive substances in perforating operation exists. At present, in the fracturing operation, a large number of vehicle sets and equipment are required to cooperate and a large number of personnel are required to participate in the operation, which will require a large amount of cost. It frequently costs hundreds of thousands or even millions for fracturing operation, accounting for a large part of the total well construction cost.
The fishbone stimulation technology adopts pure mechanical design, which will not generate any pollution and explosion risks. At present, in the use process of the existing multi-branch drilling tools, particularly after the multi-branch drilling tool operations are finished, the tools are generally left at the bottom of the well. The tool cannot be reused, resulting in the increase of operation cost, the well construction cost is further increased, and meanwhile, hidden troubles are left for an petroleum/gas well; the inner diameter of a petroleum production/gas pipe column is reduced due to the fact that the multi-branch drilling tools are left, which impacts the subsequent stimulation operation and the use of stimulation measures, thereby further impacting the petroleum production/gas yield; and in terms of the gas well, it will also lead to that the drainage tools cannot be lowered to the bottom of the well, causing the water flooding and affecting the yield and service life of gas wells.
Therefore, the research of a recyclable stimulation tool is an important research direction of multi-branch drilling technology at present.
The objective of the invention is to provide a recyclable fishbone stimulation tool to solve the problems in the prior art, which can complete two operations of perforation and fracturing at one time, complete the operation without increasing the original drilling operation personnel, and has the characteristics of simple tool operation, drilling cost saving and well building time saving.
In order to achieve the above objective, the invention provides a recyclable fishbone stimulation tool, which comprises a shell, wherein a first joint and a second joint are arranged at two ends of the shell, wherein a sealing cylinder, wherein a sealing cylinder, a flexible drill rod and a power device are arranged in the shell; wherein the first joint and the second joint are in threaded connection with the shell through a conventional drill rod; the sealing cylinder is limited in the shell through a pin and is in clearance fit with shell; and the flexible drill rod extends out of the shell and is provided with a drill bit, and the other end of the flexible drill rod is rotationally connected with the power device.
Preferably, the shell and the sealing cylinder are arranged through the clearance fit, so that smooth relative displacement can be ensured; meanwhile, the sealing ring is arranged between the shell and the sealing cylinder, so that the tightness of the tool can be ensured; and meanwhile, in order to avoid premature pressure relief warning caused by premature sliding of the sealing cylinder under the action of drilling fluid, the shell and the sealing cylinder are fixed through the pin, so that premature relative displacement between the sealing cylinder and the shell can be avoided.
Furthermore, for the purpose of practical use, the main body has the characteristics of simple structure, easy installation and no damage to main components during the use process, the components can be repeatedly used, only part of the components need to be replaced for repeated use, and the use cost of the tool is low. The length of the tool body is reasonably lower than that of the lengthened flexible drill rod, and the requirement on drilling equipment is low. The tool adopts high strength conventional components, so that the tool has the advantages of high safety, effectiveness and long service life.
Wherein the power device comprises a cutter, a power turntable, a transmission shaft, a power source and a wiper block, wherein the flexible drill rod is in transmission connection with the power turntable; wherein the cutter corresponds to the position of the flexible drill rod, and is arranged close to the sealing cylinder; wherein the cutter is in transmission connection with the power source through the transmission shaft; wherein the power turntable is arranged between the cutter and the transmission shaft, and is in key connection with the transmission shaft;
Wherein the axial line of the power source coincides with the axial line of the shell; wherein the wiper block is in clearance fit with the power source, and the wiper block also abuts against the inner wall of the shell.
Wherein the cutter and the transmission shaft are fixed by adoption of key connection and bolt connection; and the transmission shaft is in key connection with the power source.
Preferably, the shell and the sealing cylinder are sealed by means of a high temperature rubber ring, so that the shell and the sealing cylinder are not impacted by underground pressure and temperature, and have the advantage of wide application range.
Wherein a sealing ring is also arranged between the sealing cylinder and the shell, and the sealing ring is preferably a high-temperature resistant rubber ring.
Wherein the head of the cutter is in a tooth-shaped structure.
Preferably, the head part of the cutter adopts a tooth-shaped design, so that the double actions of grinding and shearing on the flexible drill rod can be realized, which is conducive to facilitate the quick shearing of the flexible drill rod, so that the operation time is reduced, and the success rate of the operation is ensured.
Wherein the power source is an impeller.
Preferably, the power source is preferably the impeller because the impeller is capable of generating a greater drilling pressure than a turbine and a screw, so an additional supercharging device is not necessary to be installed.
The invention discloses the following technical effects that two operations of perforation and fracturing can be completed at one time, at the same time, the operation can be completed without the increase of the original drilling operation personnel, the tool operation is simple, the operation time is reduced, and the success rate of the operation can be ensured;
Therefore, it can be seen from the above aspects that the tool has great economic value and popularization value.
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings which are required to be used in the embodiments will be briefly described below, and it is obvious the drawings in the following description are only some embodiments of the invention, and those ordinary skilled in the art can obtain other drawings from these drawings without devoting inventive labor.
Figure 1 refers to a schematic structural diagram of the invention.
Figure 2 refers to a schematic structural diagram of a saw tooth head of the cutter according to the invention;
wherein a first joint 1, a shell 2, a sealing cylinder 3, a pin 4, a flexible drill rod 5, a cutter 6, a power turntable 7, a transmission shaft 8, a power source 9, a centering block and a secondjoint 11.
The technical scheme in the embodiments of the invention will be clearly and fully described below in conjunction with the drawings of the embodiments of the invention, and it is obvious that the described embodiments are only a part of the embodiments of the invention, and not all the embodiments. Based on the embodiments of the invention, all other embodiments obtained by ordinary skilled in the art without creative labor are within the protection scope of the invention.
In order to make the above objects, features and advantages of the invention more obvious and easy to understood, the invention will now be further described in detail with reference to the drawings and specific implementation mode.
The invention provides a recyclable fishbone stimulation tool, which comprises a shell 2, a first joint 1 and a second joint 11 arranged at two ends of the shell 2, a sealing cylinder 3 arranged in the shell 2, a flexible drill rod 5 and a power device; wherein the first joint 1 and the second joint 11 are in threaded connection with the shell 2 through a conventional drill rod; wherein the sealing cylinder 3 is limited in the shell 2 through a pin 4 and is in clearance fit with the shell 2; and one end of the flexible drill rod 5 extends out of the shell 2, and is provided with a drill bit, and the other end of the flexible drill rod 5 is rotationally connected with the power device.
Wherein the power device comprises a cutter 6, a power turntable 7, a transmission shaft 8, a power source 9 and a wiper block 10; wherein the flexible drill rod 5 is in transmission connection with the power turntable 7; the cutter 6 corresponds to the flexible drill rod 5 and is arranged close to the sealing cylinder 3; the cutter 6 is in transmission connection with the power source 9 through the transmission shaft 8; the power turntable 7 is arranged between the cutter 6 and the transmission shaft 8, and is in key connection with the transmission shaft 8;
The axial line of the power source 9 coincides with the axial line of the shell 2; wherein the wiper block 10 is in clearance fit with the power source 9, and the wiper block 10 also abuts against the inner wall of the shell 2.
The cutter 6 and the transmission shaft 8 are fixed by adoption of key connection and bolt connection; and the transmission shaft 8 is in key connection with the power source 9.
A sealing ring is also arranged between the sealing cylinder 3 and the shell 2, and the sealing ring is preferably a high-temperature resistant rubber ring.
The head of the cutter 6 is in a tooth-shaped structure.
The power source 9 is preferably an impeller.
In one embodiment of the invention, the tool is designed with a drilling fluid flow passage, which can ensure that the drilling fluid reaches the bottom of the well smoothly without causing a pressure drop that affects the drilling pressure.
In another embodiment of the invention, the flexible drill rod 5 is a flexible drill rod which has the advantages of good in elasticity, high tensile resistance and compression resistance; and the power source 9 adopts an impeller.
In another embodiment of the invention, as shown in Figure 1, the installation is conducted by the means of from left to right: the first joint 1 and the shell 2 are connected with the shell 2 and the sealing cylinder 3 through conventional drill rod threads, so as to ensure the relative displacement effectiveness, and the sealing ring is installed to ensure the tightness of the tool; the pin 4 is used to fix the shell 2 and the sealing cylinder 3, so as to ensure that the shell 2 and the sealing cylinder 3 do not generate relative displacement; the flexible drill rod 5 is connected with the power turntable 7, the power turntable 7 transmits the torque generated by the power assembly to the flexible drill rod , and the flexible drill rod 5 further transmits the torque to the drill bit for rock breaking drilling;
The cutter 6 and the transmission shaft 8 are connected by means of key connection and bolt connection, which ensures that the displacement will not occur relatively while the transmission of pressure and torque is ensured; the transmission shaft 8 and the power source 9 are in key connection, so that the effective transmission of torque generated by the power source 9 can be ensured; the center shaft of the power source 9 and the wiper block 10 adopts in the means of clearance fit, so that the smooth rotation of the center shaft is ensured; meanwhile, the wiper block 10 ensures that the shaft center of the power source 9 is centered, and no circumferential displacement is generated, so that the effectiveness of the power source 9 is ensured; and the shell 2 is in threaded connection with the second joint 11 through a flexible drill rod. The first joint 1, the shell 2 and the second joint 11 are adopted as shell support part of the tool.
When the power source 9 is an impeller, the torque generated by the impact impeller of the underground drilling fluid during construction can meet the requirement of drilling operation; when the drilling operation is finished, the tool continuously moves towards the bottom of the well, the cutter 6 cuts off the flexible drill rod 5 under the action of force; after the cutter 6 cuts off the flexible drill rod 5, the cutter 6 continuously moves towards the bottom of the well under the action of the force of the drilling fluid to act on a sealing cylinder 3; the sealing cylinder 3 transmits the pressure and acts on pin 4, and after the cutter 6 cuts off pin 4, the cutter 6 continues to move to the bottom hole under the force of drilling fluid; when the upper edge of the sealing cylinder 3 exceeds the remaining through-hole on the shell 2, the tool can generate a pressure channel with the downhole environmental control, thereby generating obvious pressure drop, and then the pressure drop is taken as a signal to inform the completion information to the surface operation; and in the surface operation, the tools are lifted off the bottom of the well to the ground, and after maintenance and replacement operation of parts, the next stimulation operation is prepared. And the next operation can be carried out only by reinstalling parts such as the flexible drill rod, the drill bit and the like when the next operation is carried out.
The invention can replace two operation processes including perforation and fracturing operation in the well alternative completion process; and all the operation procedures can be completed at one time, the operation can be completed only by means of the original drilling tool, which does not need to add other auxiliary equipment, and has the advantages of simple operation procedure, short operation time and obvious operation signal, and no additional equipment is required for monitoring by adoption of the drilling hydraulic pressure drop as the signal of the completion of the tool operation;
And the tool is completely recyclable, only an uncased wellbore is left after the operation is finished, which will not affect the the application of subsequent well completion operation, stimulation measures and other measures.
In the description of the invention, it is to be understood that the orientation or positional relations indicated by the terms of "longitudinal", "transverse, "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like are based on the orientation or positional relations shown in the drawings, and is only intended to facilitate the description of the invention, and does not indicate or imply that the device or element in the invention must have a specific orientation, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation of the invention.
The above-mentioned embodiments are only illustrative of the preferred embodiments of the invention and are not intended to limit the scope of the invention, and various modifications and improvements made by those of ordinary skilled in the art without departing from the spirit of the design of the invention shall be fallen within the scope of protection defined by the claims.
Claims (8)
1. A recyclable fishbone stimulation tool, which is characterized in comprising: a shell (2), a first joint (1) and a second joint (11) arranged at both ends of the shell (2), and a sealing cylinder (3), a flexible drill rod (5) and a power device are arranged in the shell (2); wherein the first joint (1) and the second joint (11) are both in threaded connection with the shell (2); wherein the sealing cylinder (3) is limited in the shell (2) through a fastener, and is in clearance fit with the shell (2); and the end of flexible drill rod (5) extending out of the shell (2) is equipped with a drilling bit, and the other end is rotationally connected with the power device.
2. The recyclable fishbone stimulation tool according to claim 1, which is characterized in that wherein the power device comprises a cutter (6), a power turntable (7), a transmission shaft (8), a power source (9) and a wiper block (10); wherein the flexible drill rod (5) is in transmission connection with the power turntable (7); wherein the cutter (6) corresponds to the flexible drill rod (5) in position, and is arranged close to the sealing cylinder (3); wherein the cutter (6) is in transmission connection with the power source (9) through the transmission shaft (8); and the power turntable (7) is arranged between the cutter (6) and the transmission shaft (8) and is in key connection with the transmission shaft (8);
Wherein the axial line of the power source (9) coincides with the axial line of the shell (2); wherein the wiper block (10) is in clearance fit with the power source (9), and the wiper block (10) also abuts against the inner wall of the shell (2).
3. The recyclable fishbone stimulation tool according to claim 2, which is characterized in that the cutter (6) and the transmission shaft (8) are fixed by adoption of key connection and bolt connection; and the transmission shaft (8) is in key connection with the power source (9).
4. The recyclable fishbone stimulation tool according to claim 1, which is characterized in that a sealing ring is also arranged between the sealing cylinder (3) and the shell (2), and the sealing ring is preferably a high-temperature resistant rubber ring.
5. The recyclable fishbone stimulation tool according to claim 2, which is characterized in that the head of the cutter (6) is in a tooth-shaped structure.
6. The recyclable fishbone stimulation tool according to claim 2, which is characterized in that the power source (9) is an impeller.
7. The recyclable fishbone stimulation tool according to claim 1, which characterized in that the fastener is a pin (4).
8. The recyclable fishbone stimulation tool according to claim 1, which is characterized in that both the first joint (1) and the second joint (11) are in threaded connection with the shell (2) by means of a conventional drill rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2020102875A AU2020102875A4 (en) | 2020-10-19 | 2020-10-19 | Recyclable Fishbone Stimulation Tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2020102875A AU2020102875A4 (en) | 2020-10-19 | 2020-10-19 | Recyclable Fishbone Stimulation Tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2020102875A4 true AU2020102875A4 (en) | 2020-12-17 |
Family
ID=73746696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2020102875A Ceased AU2020102875A4 (en) | 2020-10-19 | 2020-10-19 | Recyclable Fishbone Stimulation Tool |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2020102875A4 (en) |
-
2020
- 2020-10-19 AU AU2020102875A patent/AU2020102875A4/en not_active Ceased
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |