CN114033299A - Drilling method for improving broken formation rock - Google Patents
Drilling method for improving broken formation rock Download PDFInfo
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- CN114033299A CN114033299A CN202111227656.3A CN202111227656A CN114033299A CN 114033299 A CN114033299 A CN 114033299A CN 202111227656 A CN202111227656 A CN 202111227656A CN 114033299 A CN114033299 A CN 114033299A
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- drilling
- drill bit
- formation rock
- fluid
- fractured formation
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Links
- 238000005553 drilling Methods 0.000 title claims abstract description 115
- 239000011435 rock Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 18
- 239000012530 fluid Substances 0.000 claims abstract description 32
- 238000011010 flushing procedure Methods 0.000 claims abstract description 16
- 229920001938 Vegetable gum Polymers 0.000 claims abstract description 15
- 238000005070 sampling Methods 0.000 claims abstract description 15
- 239000002002 slurry Substances 0.000 claims description 33
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000002689 soil Substances 0.000 claims description 11
- 239000002585 base Substances 0.000 claims description 10
- 239000003513 alkali Substances 0.000 claims description 8
- 229910003460 diamond Inorganic materials 0.000 claims description 6
- 239000010432 diamond Substances 0.000 claims description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- 238000005406 washing Methods 0.000 abstract description 4
- 239000003292 glue Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterized by means for land transport with their own drive, e.g. skid mounting or wheel mounting
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/20—Natural organic compounds or derivatives thereof, e.g. polysaccharides or lignin derivatives
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/34—Lubricant additives
Abstract
An improved drilling method for breaking stratum rocks relates to the field of stratum drilling. The improved drilling method for breaking formation rock comprises the following steps: selecting a drilling tool and a drill bit to be matched for carrying out a field drilling test, using vegetable gum as mud to treat flushing fluid in the drilling test, adjusting the flow and the rotating speed of drilling fluid in the field drilling test, checking the core sampling rate obtained by drilling, and selecting the drilling tool and the drill bit with qualified core sampling rate and the corresponding flow and rotating speed of the drilling fluid. The drilling method for improving the broken formation rock provided by the embodiment can screen drilling tools, drill bits and corresponding drilling processes with the broken loose formation core taking rate of over 90 percent, shorten the time for washing wells and salvaging rock debris by workers and reduce the labor intensity.
Description
Technical Field
The present application relates to the field of rock formation drilling, and in particular, to an improved drilling method for breaking formation rock.
Background
The pipeline crossing technology of the large river in China has experienced the development course of decades, from the early crossing mode mainly by immersed tube to the directional drilling crossing mode introduced in 90 years, along with the development of the pipeline construction technology, the existing directional drilling construction technology is very mature, the pipeline construction is developed with sudden and violent advancement in the last decade, the pipe diameter is also larger and larger, the requirements of planning and environmental protection on pipeline engineering are higher and higher, the large river basically adopts a deep-buried mode for crossing, and the crossing mode adopted in China at present mainly comprises a directional drilling mode and a tunnel. The fresh air pipeline passes through a large river, and part of the fresh air pipeline passes through the large river in a tunnel manner due to the large pipe diameter and the complex geological condition of the large river.
Based on the reasons, the conventional drilling methods such as alloy drill bit and single-pipe rock core pipe, clear water flushing, pipe following reaming, slurry circulation and the like are generally adopted in China, so that the coring quality is poor, in order to improve the rock core sampling rate and reduce the disturbance of drilling on rock and soil samples, a plurality of new methods exist in China, such as cement slurry is added into a drill hole, drilling is carried out after cement is solidified, or biological gel is added to solidify a stratum, and in some cases, liquid nitrogen is adopted to freeze the stratum and then drilling and sampling are carried out, but the methods have various defects, mainly long exploration period of field industry and high cost.
Disclosure of Invention
The application aims to provide an improved drilling method for breaking stratum rock, which can screen drilling tools, drill bits and corresponding drilling processes with the broken loose stratum core taking rate reaching more than 90%, shorten the time for washing wells and salvaging rock debris by workers and reduce the labor intensity.
The embodiment of the application is realized as follows:
the embodiment of the application provides an improved drilling method for breaking stratum rocks, which comprises the following steps:
selecting a drilling tool and a drill bit to be matched for carrying out a field drilling test, using vegetable gum as mud to treat flushing fluid in the drilling test, adjusting the flow and the rotating speed of drilling fluid in the field drilling test, checking the core sampling rate obtained by drilling, and selecting the drilling tool and the drill bit with qualified core sampling rate and the corresponding flow and rotating speed of the drilling fluid.
In some alternative embodiments, the drilling tool is selected from one of a single-tube core barrel, a double-tube single-action core barrel, and a half-box drilling tool.
In some alternative embodiments, the drill bit is selected from one of an alloy drill bit, a compact drill bit, a diamond drill bit, and a tine compact drill bit.
In some alternative embodiments, the diamond bit is used after being softened using a nitric acid bubble.
In some alternative embodiments, the drilling fluid flow rate is 60-80L/m.
In some alternative embodiments, the linear speed of penetration of the drill bit is 1.5 to 3.2 m/s.
In some alternative embodiments, the mass ratio of the base slurry to the gum lye in the slurry treatment rinse is 1; 0.015-0.02; the mass ratio of water, soil and sodium hydroxide in the base slurry is 1: 0.25-0.3: 5% of soil weight, and the mass ratio of water, plant gum and sodium hydroxide in the gum alkali solution is 1: 0.03-0.05: 0.005.
In some optional embodiments, the upward flow rate of the slurry treatment flushing liquid is above 0.3-0.5m/s, and the height of the water gap of the drill bit is above 3 mm.
The beneficial effect of this application is: the embodiment provides an improved drilling method for breaking stratum rocks, which comprises the following steps: selecting a drilling tool and a drill bit to be matched for a field drilling test, using vegetable gum as mud to treat flushing fluid in the drilling test, adjusting the flow and the rotating speed of drilling fluid in the field drilling test, checking the core sampling rate obtained by drilling, and selecting the drilling tool and the drill bit with qualified core sampling rate and the corresponding flow and rotating speed of the drilling fluid. According to the improved drilling method for the broken formation rock, drilling tools, drill bits and corresponding drilling processes with the broken loose formation core taking rate of over 90% can be obtained through screening, the well washing and rock debris salvaging time of workers is shortened, and the labor intensity is reduced.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of embodiments of the present application may be arranged and designed in a wide variety of different configurations.
Thus, the detailed description of the embodiments of the present application provided below is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the present application. All other embodiments that can be derived by a person skilled in the art from the embodiments given herein without making any creative effort fall within the protection scope of the present application.
The features and properties of the improved drilling method for fracturing formation rock of the present application are described in further detail below with reference to the examples.
The embodiment of the application provides an improved drilling method for breaking stratum rocks, which comprises the following steps: selecting a drilling tool and a drill bit to be matched for carrying out a field drilling test, using the implant glue as mud to treat flushing fluid in the drilling test, adjusting the flow and the rotating speed of drilling fluid in the field drilling test, checking the core sampling rate obtained by drilling, and selecting the drilling tool and the drill bit with qualified core sampling rate and the corresponding flow and the rotating speed of the drilling fluid. Optionally, the drilling tool is selected from one of a single-tube core barrel, a double-tube single-action core barrel and a half-box-tube drilling tool. Optionally, the drill bit is selected from one of an alloy drill bit, a compact drill bit, a diamond drill bit, and a tine compact drill bit. Optionally, the diamond bit is used after being softened by nitric acid bubbles. Optionally, the drilling fluid flow rate is 60-80L/m. Optionally, the linear speed of the drill bit is 1.5-3.2 m/s. Optionally, the mass ratio of the base slurry to the glue alkali liquor in the slurry treatment washing liquid is 1; 0.015-0.02; the mass ratio of water, soil and sodium hydroxide in the base slurry is 1: 0.25-0.3: 5% of soil weight, and the mass ratio of water, plant gum and sodium hydroxide in the gum alkali solution is 1: 0.03-0.05: 0.005. Optionally, the upward return flow rate of the slurry treatment flushing liquid is more than 0.3-0.5m/s, and the height of a water gap of the drill bit is more than 3 mm.
The drilling method for improving the broken stratum rock provided by the embodiment is characterized in that different drilling tools and different drill bits are selected to be matched with each other to perform drilling tests at different field drilling fluid flow rates and rotating speeds, vegetable gum is used as slurry treatment flushing fluid in the drilling tests, the core sampling rate obtained by checking drilling is high or low, drilling tools and drill bits with qualified core sampling rates are selected, and the drilling fluid flow rates and the rotating speeds correspond to the rock stratum drilling operation conditions of loosening, breaking and joint development, so that the coring rate and the drilling efficiency are effectively improved. In order to improve the core sampling rate, keep the pore wall complete and reduce the occurrence of drilling accidents, vegetable gum is adopted as a slurry treating agent for slurry circulation drilling, vegetable gum slurry is added into low-solid-phase slurry to prepare vegetable gum slurry, the slurry has high viscosity and low water loss, and simultaneously has the functions of protecting gum, damping and lubricating, the higher viscosity of the slurry can reduce the scouring of a core, the low water loss can reduce the hydration of the core and the pore wall, the gum protecting function can form a layer of protective rubber film on the surface of the core, the slurry has the functions of cementation and protection on the core, the damping function is to absorb the vibration energy in the rotation of a drilling tool based on the viscoelasticity of the vegetable gum, the damage to the core is reduced by reducing the vibration, and the lubricating function can also reduce the scouring of drilling fluid on the core.
Example 1
The embodiment of the application provides an improved drilling method for breaking stratum rocks, which comprises the following steps: selecting a semi-box pipe drilling tool and a sharp-tooth composite bit to cooperate to carry out an on-site drilling test, wherein vegetable gum is used as a slurry treatment flushing fluid in the drilling test, the vegetable gum is SM vegetable gum, the drilling linear speed of the drill bit is adjusted to be 3m/s during the on-site drilling test, the flow rate of a drilling fluid is 70L/m, and the mass ratio of base slurry to glue alkali liquor in the slurry treatment flushing fluid is 1; 0.02; the mass ratio of water, soil and sodium hydroxide in the base slurry is 1: 0.3: 5% of soil weight, and the mass ratio of water, plant gum and sodium hydroxide in the gum alkali solution is 1: 0.05: 0.005, the upward return flow speed of the slurry treatment flushing fluid is 0.5m/s, and the height of a water gap of the drill bit is 3 mm; the core recovery from drilling was checked to be 95%.
Example 2
The embodiment of the application provides an improved drilling method for breaking stratum rocks, which comprises the following steps: selecting a semi-box pipe drilling tool and a sharp-tooth composite bit to cooperate to carry out an on-site drilling test, wherein vegetable gum is used as a slurry treatment flushing fluid in the drilling test, the vegetable gum is SM vegetable gum, the drilling linear velocity of the drill bit is adjusted to be 2.5m/s during the on-site drilling test, the flow rate of a drilling fluid is 80L/m, and the mass ratio of base slurry to glue alkali liquor in the slurry treatment flushing fluid is 1; 0.0015; the mass ratio of water, soil and sodium hydroxide in the base slurry is 1: 0.25: 5% of soil weight, and the mass ratio of water, plant gum and sodium hydroxide in the gum alkali solution is 1: 0.04: 0.005, the upward return flow speed of the slurry treatment flushing fluid is 0.4m/s, and the height of a water gap of the drill bit is 4 mm; the core recovery from drilling was checked to be 95%.
The embodiments described above are some, but not all embodiments of the present application. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Claims (8)
1. A method of improving drilling of fractured formation rock comprising the steps of:
selecting a drilling tool and a drill bit to be matched for carrying out a field drilling test, using vegetable gum as mud to treat flushing fluid in the drilling test, adjusting the flow and the rotating speed of drilling fluid in the field drilling test, checking the core sampling rate obtained by drilling, and selecting the drilling tool and the drill bit with qualified core sampling rate and the corresponding flow and rotating speed of the drilling fluid.
2. An improved method of drilling fractured formation rock according to claim 1, wherein the drilling tool is selected from one of a single-pipe core barrel, a double-pipe single-action core barrel, and a half-box-pipe drilling tool.
3. An improved method of drilling a fractured formation rock according to claim 2, wherein the drill bit is selected from one of an alloy bit, a compact bit, a diamond bit, and a tine compact bit.
4. An improved method of drilling a fractured formation rock according to claim 3, wherein the diamond bit is used after being softened using nitric acid bubbles.
5. An improved method of drilling a fractured formation rock according to claim 3, wherein the drilling fluid flow rate is 60-80L/m.
6. An improved method of drilling through fractured formation rock according to claim 4, wherein the linear drilling velocity of the drill bit is 1.5-3.2 m/s.
7. A method of improving the drilling of fractured formation rock according to claim 1, wherein the mass ratio of the base slurry to the cement liquor in the slurry treatment flush fluid is 1; 0.015-0.02; the mass ratio of water, soil and sodium hydroxide in the base slurry is 1: 0.25-0.3: 5% of soil weight, wherein the mass ratio of water, plant gum and sodium hydroxide in the gum alkali solution is 1: 0.03-0.05: 0.005.
8. a method of improving the drilling of fractured formation rocks according to claim 1, wherein the upward flow rate of the slurry treatment flushing fluid is 0.3 to 0.5m/s or more, and the height of the water gap of the drill bit is 3mm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111227656.3A CN114033299A (en) | 2021-10-21 | 2021-10-21 | Drilling method for improving broken formation rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111227656.3A CN114033299A (en) | 2021-10-21 | 2021-10-21 | Drilling method for improving broken formation rock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114033299A true CN114033299A (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111227656.3A Pending CN114033299A (en) | 2021-10-21 | 2021-10-21 | Drilling method for improving broken formation rock |
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| CN (1) | CN114033299A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115093839A (en) * | 2022-07-01 | 2022-09-23 | 肥城新查庄地质勘查有限公司 | Coal mine drilling system and method and drilling fluid |
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