CN114961635B - Method and device for strengthening surrounding rock strength of well wall of well drilling based on electromagnetic waves - Google Patents

Method and device for strengthening surrounding rock strength of well wall of well drilling based on electromagnetic waves Download PDF

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Publication number
CN114961635B
CN114961635B CN202210679286.5A CN202210679286A CN114961635B CN 114961635 B CN114961635 B CN 114961635B CN 202210679286 A CN202210679286 A CN 202210679286A CN 114961635 B CN114961635 B CN 114961635B
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electromagnetic waves
surrounding rock
drilling
strength
stratum
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CN114961635A (en
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卢运虎
金衍
陈勉
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China University of Petroleum Beijing
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China University of Petroleum Beijing
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    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
    • E21B33/138—Plastering the borehole wall; Injecting into the formation
    • 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
    • C09K8/03—Specific additives for general use in well-drilling compositions
    • 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
    • C09K8/22—Synthetic organic compounds
    • C09K8/24—Polymers
    • 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
    • C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
    • 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
    • C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
    • C09K8/504—Compositions based on water or polar solvents
    • C09K8/506—Compositions based on water or polar solvents containing organic compounds
    • C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
    • 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
    • C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
    • C09K8/504—Compositions based on water or polar solvents
    • C09K8/506—Compositions based on water or polar solvents containing organic compounds
    • C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
    • C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
    • 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

The application discloses a method and a device for strengthening the strength of surrounding rock of a well wall of a well based on electromagnetic waves, wherein the method for strengthening the strength of the surrounding rock of the well wall of the well based on the electromagnetic waves comprises the following steps: pumping in an enhanced drilling fluid under the condition that the current drilling stratum is determined to be a fractured or fractured stratum, wherein the enhanced drilling fluid comprises a curing agent, an initiator and a drilling fluid; the electromagnetic wave is emitted to the current drilling stratum to activate the initiator, so that the initiator and the curing agent generate a crosslinking curing reaction to bond and cure broken zones and cracks in the stratum, the purpose of strengthening the strength of surrounding rock of a well wall is achieved, the damage of broken or fractured stratum is essentially solved from the mechanical mechanism, and the success rate of solving the collapse of the well wall of the broken or fractured stratum is improved.

Description

Method and device for strengthening surrounding rock strength of well wall of well drilling based on electromagnetic waves
Technical Field
The application belongs to the technical field of oil-gas well engineering, and particularly relates to a method and a device for reinforcing the strength of surrounding rock of a well wall of a well drilling based on electromagnetic waves.
Background
In the drilling process, complex stratum such as fragility or cracking property is often drilled, drilling fluid easily enters the stratum along channels such as bedding and cracking, so that mineral substances of part of stratum are expanded by water absorption, cracking is expanded, the strength of surrounding rock of a well wall is reduced, collapse occurs, underground complex conditions such as drilling resistance and drilling sticking are caused, the drilling speed is delayed, the drilling period is increased, and engineering rejection is easily caused when serious conditions are serious.
At present, aiming at the problem of well wall collapse of a broken or fractured stratum, the conventional method is to improve the inhibition and the blocking performance of the drilling fluid by optimizing the type and the formula of the drilling fluid, wherein the main mechanism is to reduce the water penetrating into the stratum and inhibit hydration expansion of clay and the like, but the method cannot completely isolate the invasion of the drilling fluid, even part of the method can cause lower and lower strength of surrounding rock of the well wall and higher collapse frequency; in addition, the density of the drilling fluid can be improved by adopting a physical and chemical method, plugging materials such as expansion cement, fiber, shell, polymer and the like are added into the drilling fluid to plug cracks, the plugging method is influenced by the size of the cracks, the filling materials cannot fully plug the cracks, the success rate is low, the greater the density of the drilling fluid is, the greater the pressure on a stratum is, the greater the expansion of the cracks is, and the situation of 'lifting and leaking and collapsing' is formed.
Disclosure of Invention
Aiming at the defects or shortcomings in the prior art, the application provides a method and a device for strengthening the strength of surrounding rock of a well wall of a well based on electromagnetic waves, and aims to solve the technical problem that the existing method for solving the problem of low success rate of broken or fractured stratum well wall collapse is low.
In order to achieve the above object, a first aspect of the present application provides a method for strengthening the strength of a borehole wall surrounding rock based on electromagnetic waves, wherein the method for strengthening the strength of the borehole wall surrounding rock based on electromagnetic waves comprises:
pumping in an enhanced drilling fluid under the condition that the current drilling stratum is determined to be a fractured or fractured stratum, wherein the enhanced drilling fluid comprises a curing agent, an initiator and a drilling fluid;
electromagnetic waves are emitted to the current drilling formation to activate the initiator to cause the initiator to crosslink with the curing agent.
In the embodiment of the application, the curing agent is a free radical polymer, and the initiator is a peroxide or azo compound.
In the embodiment of the application, the mass fraction of the curing agent in the reinforced drilling fluid is 1-20%, and the mass fraction of the initiator is 0.1-5% of the mass of the curing agent.
In an embodiment of the present application, transmitting electromagnetic waves to a currently drilled formation activates an initiator to cause a cross-linking curing reaction between the initiator and a curing agent comprising:
lowering an electromagnetic wave transmitting device into the current drilling stratum;
controlling the electromagnetic wave emitting device to emit electromagnetic waves at a preset frequency to activate the initiator so as to enable the initiator and the curing agent to generate a crosslinking curing reaction.
In the embodiment of the application, the method for strengthening the strength of the surrounding rock of the well wall of the well based on the electromagnetic wave further comprises the following steps:
and determining whether the current drilling stratum is a broken stratum or a fractured stratum according to the real-time drilling data.
In an embodiment of the application, the real-time drilling data is at least one of pump pressure change data, size of returned cuttings, logging while drilling data, and radioactive tracer logging data.
In order to achieve the above object, a second aspect of the present application provides an apparatus for reinforcing strength of a borehole wall surrounding rock based on electromagnetic waves, wherein the apparatus for reinforcing strength of a borehole wall surrounding rock based on electromagnetic waves is applied to the method for reinforcing strength of a borehole wall surrounding rock based on electromagnetic waves according to the above, and includes:
the drill rod body comprises a first drill rod and a second drill rod;
the electromagnetic wave transmitting device comprises a transmitting drill pipe nipple provided with a containing space and an electromagnetic wave transmitting assembly sealed in the containing space, wherein two ends of the transmitting drill pipe nipple are respectively connected with the first drill pipe and the second drill pipe in one-to-one correspondence, and the electromagnetic wave transmitting assembly is used for directionally transmitting electromagnetic waves.
In the embodiment of the application, the transmitting drill pipe nipple comprises a first connector, a connecting rod body and a second connector, wherein the connecting rod body is provided with an accommodating space, the first connector and the second connector are respectively arranged at two ends of the connecting rod body and seal the accommodating space, the first connector, the connecting rod body and the second connector are sequentially communicated to form a hollow runner through which drilling fluid flows, and one ends of the first connector and the second connector, which are far away from the connecting rod body, are respectively connected with the first drill pipe and the second drill pipe in a one-to-one correspondence manner.
In the embodiment of the application, the electromagnetic wave transmitting assembly comprises an electromagnetic wave oscillator, a directional transmitting antenna and an energy storage power supply, wherein the directional transmitting antenna and the energy storage power supply are respectively and electrically connected with the electromagnetic wave oscillator.
In order to achieve the above object, a third aspect of the present application provides a drilling apparatus, wherein the drilling apparatus comprises a device for reinforcing the strength of the wall of a well according to the above, based on electromagnetic waves.
Through the technical scheme, the method for strengthening the strength of the surrounding rock of the well wall of the well based on the electromagnetic wave provided by the embodiment of the application has the following beneficial effects:
according to the technical scheme, under the condition that the current drilling stratum is determined to be the breakable or fractured stratum, the reinforced drilling fluid can be pumped into the current drilling stratum, and after the reinforced drilling fluid is adsorbed in the breaking zone and the fracture surface of the current drilling stratum, electromagnetic waves can be emitted into the current drilling stratum so as to activate the initiator in the reinforced drilling fluid, promote the initiator and the curing agent to carry out crosslinking curing reaction, bond and cure the breaking zone and the fracture in the stratum, achieve the purpose of strengthening the strength of surrounding rock of the well wall, solve the damage of the breakable or fractured stratum from the essence of a mechanical mechanism, and improve the success probability of solving the wall collapse of the breakable or fractured stratum.
Additional features and advantages of embodiments of the application will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain, without limitation, the embodiments of the application. In the drawings:
FIG. 1 is a flow chart of a method for reinforcing borehole wall surrounding rock strength based on electromagnetic waves in accordance with an embodiment of the present application;
FIG. 2 is a flow chart of steps 200 in a method for reinforcing borehole wall surrounding rock strength based on electromagnetic waves in accordance with an embodiment of the present application;
FIG. 3 is a schematic diagram of a device for reinforcing the strength of surrounding rock of a well wall of a well by electromagnetic waves according to an embodiment of the application;
fig. 4 is a schematic structural view of an electromagnetic wave emitting apparatus according to an embodiment of the present application.
Description of the reference numerals
1. First drill rod 2 second drill rod
3. Electromagnetic wave transmitting device 31 transmits drill pipe nipple
311. The first joint 312 is connected with the rod body
313. Second connector 314 accommodating space
315. Hollow runner 32 electromagnetic wave emission assembly
321. Directional transmitting antenna of electromagnetic wave oscillator 322
323. First sealing ring of energy storage power supply 33
34. Second sealing ring
Detailed Description
The following describes the detailed implementation of the embodiments of the present application with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the application, are not intended to limit the application.
In addition, if a directional instruction (such as up, down, left, right, front, and rear … …) is included in the embodiment of the present application, the directional instruction is merely used to explain a relative positional relationship, a movement condition, and the like between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional instruction is correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.
The fragility or cracking of the formation is prone to lost circulation, collapse, etc. and is essentially a mechanical problem. The broken or fractured stratum has the layers and cracks developed, the strength of surrounding rock of the well wall is reduced under the action of drilling fluid, the collapse pressure is increased, and the stratum is easy to collapse. Therefore, from the mechanical mechanism, the improvement of the strength of the surrounding rock of the well wall is the best method for solving the drilling safety accidents caused by the broken or fractured stratum.
Fig. 1 schematically shows a flow chart of a method for reinforcing the strength of a borehole wall surrounding rock based on electromagnetic waves according to an embodiment of the application. As shown in fig. 1, the application provides a method for strengthening the strength of a well wall surrounding rock based on electromagnetic waves, wherein the method for strengthening the strength of the well wall surrounding rock based on the electromagnetic waves comprises the following steps:
step 100, in the event that the current drilling formation is determined to be a fractured or fractured formation, pumping an enhanced drilling fluid, wherein the enhanced drilling fluid includes a curing agent, an initiator, and a drilling fluid.
In the drilling process, if the current drilling stratum is detected to be a broken or fractured stratum, the reinforced drilling fluid comprising a curing agent, an initiator and the drilling fluid can be pumped into the current drilling stratum through the drilling equipment, and the curing agent and the initiator enter the current drilling stratum together with the drilling fluid due to the leakage of the broken or fractured stratum and are adsorbed in broken zones and fracture surfaces of the current drilling stratum. Specifically, the curing agent can be a molecular polymer containing an unsaturated double bond structure, and the initiator is an active intermediate capable of generating an initiating crosslinking polymerization capability through chemical change under the stimulation of electromagnetic waves.
Step 200, transmitting electromagnetic waves to the current drilling stratum to activate the initiator so as to enable the initiator and the curing agent to generate a crosslinking curing reaction.
Specifically, an electromagnetic wave transmitting device can be used for directionally transmitting electromagnetic wave to the current drilling stratum to activate an initiator, the initiator generates free radicals under the stimulation of electromagnetic wave, and the generated free radicals and a curing agent generate cross-linking polymerization and slowly solidify and solidify.
According to the technical scheme, under the condition that the current drilling stratum is determined to be the breakable or fractured stratum, the reinforced drilling fluid can be pumped into the current drilling stratum, and after the reinforced drilling fluid is adsorbed in the breaking zone and the fracture surface of the current drilling stratum, electromagnetic waves can be emitted into the current drilling stratum so as to activate the initiator in the reinforced drilling fluid, promote the initiator and the curing agent to carry out crosslinking curing reaction, bond and cure the breaking zone and the fracture in the stratum, achieve the purpose of strengthening the strength of surrounding rock of the well wall, solve the damage of the breakable or fractured stratum from the essence of a mechanical mechanism, and improve the success probability of solving the wall collapse of the breakable or fractured stratum.
In the embodiment of the application, the curing agent can be a free radical polymer, and can be one of an acrylic polymer, an unsaturated polyester or a styrene polymer, the initiator can be peroxide or an azo compound, the peroxide initiator can be dibenzoyl peroxide (BPO) or lauroyl peroxide, and the azo compound initiator can be azobisisobutyronitrile or azobisisoheptonitrile. Specifically, the drilling fluid can be a common bentonite drilling fluid or KCL polymer drilling fluid, and the curing agent, the initiator and the drilling fluid can be prepared into the reinforced drilling fluid according to a certain proportion.
In the embodiment of the application, the mass fraction of the curing agent in the reinforced drilling fluid can be 1-20%, and the mass fraction of the initiator is 0.1-5% of the mass of the curing agent. Specifically, the mass fraction of the curing agent in the reinforced drilling fluid is preferably 5%, and the mass of the initiator is 1% of that of the curing agent.
Fig. 2 schematically shows a flow chart of steps 200 in a method for reinforcing borehole wall surrounding rock strength based on electromagnetic waves according to an embodiment of the application. As shown in fig. 2, in an embodiment of the present application, step 200 of transmitting electromagnetic waves to the currently drilled formation activates an initiator to cause a cross-linking curing reaction between the initiator and a curing agent comprises:
step 210, lowering the electromagnetic wave transmitting device into the current drilling formation.
Further, an electromagnetic wave transmitting device may be mounted on the drill pipe and lowered into the currently drilled formation. Of course, the electromagnetic wave transmitting device can be put into the current drilling formation in other ways.
And 220, controlling the electromagnetic wave emitting device to emit electromagnetic waves at a preset frequency to activate the initiator so as to enable the initiator and the curing agent to generate a crosslinking curing reaction.
Further, the transmitting direction of the electromagnetic wave transmitting device is designated as the current drilling stratum, the electromagnetic wave transmitting device 3 is controlled to transmit electromagnetic waves at a preset frequency, so that the electromagnetic waves are transmitted to the current drilling stratum and the initiator in the current drilling stratum is activated, the initiator and the curing agent generate a crosslinking curing reaction, and broken bands and cracks in the stratum are bonded and cured, so that the strength of surrounding rock of a well wall is enhanced.
In the embodiment of the application, the method for strengthening the strength of the surrounding rock of the well wall of the well based on the electromagnetic wave further comprises the following steps:
step 300, determining whether the current drilling formation is a fractured or fractured formation based on the real-time drilling data.
Specifically, the geological condition of the current drilling formation may be monitored according to the real-time drilling data, and when it is determined that the current drilling formation is a fractured or cracked formation, steps 100 and 200 may be performed to strengthen and strengthen the current drilling formation as surrounding rock.
More specifically, the real-time drilling data may be at least one of pump pressure variation data, size of returned cuttings, logging while drilling data, and radiotracer logging data. The target location of the fractured or fractured formation may be determined based on one of pump pressure variation data, size of returned cuttings, logging while drilling data, and radiotracer logging data.
In order to achieve the above object, as shown in fig. 3 and 4, a second aspect of the present application provides an apparatus for reinforcing strength of a borehole wall surrounding rock based on electromagnetic waves, wherein the apparatus for reinforcing strength of a borehole wall surrounding rock based on electromagnetic waves is applied to the method for reinforcing strength of a borehole wall surrounding rock based on electromagnetic waves according to the above, and includes:
the drill rod body comprises a first drill rod 1 and a second drill rod 2;
the electromagnetic wave transmitting device 3 comprises a transmitting drill pipe nipple 31 formed with a containing space 314 and an electromagnetic wave transmitting assembly 32 sealed in the containing space 314, wherein two ends of the transmitting drill pipe nipple 31 are respectively connected with the first drill pipe 1 and the second drill pipe 2 in one-to-one correspondence, and the electromagnetic wave transmitting assembly 32 is used for directional transmitting electromagnetic waves.
That is, the electromagnetic wave transmitting device 3 may be directly added to the drill pipe, and after determining that the current drilling stratum is a fractured or cracked stratum, the transmitting drill pipe nipple 31 may be lowered into the current drilling stratum, and then the electromagnetic wave transmitting assembly 32 may be controlled to transmit electromagnetic waves to the current drilling stratum.
In the embodiment of the present application, the transmitting drill pipe nipple 31 includes a first connector 311, a connecting rod 312 and a second connector 313, the connecting rod 312 is provided with an accommodating space 314, the first connector 311 and the second connector 313 are respectively arranged at two ends of the connecting rod 312 and seal the accommodating space 314, the first connector 311, the connecting rod 312 and the second connector 313 sequentially penetrate through to form a hollow runner 315 for drilling fluid to flow through, and one ends of the first connector 311 and the second connector 313 far away from the connecting rod 312 are respectively connected with the first drill pipe 1 and the second drill pipe 2 in a one-to-one correspondence. That is, the electromagnetic wave emitting assembly 32 may be disposed in the accommodating space 314, and the first connector 311 and the second connector 313 may seal the accommodating space 314 from two ends of the connecting rod 312, so as to ensure that the electromagnetic wave emitting assembly 32 can work normally in the current drilling stratum.
Specifically, one end of the first connector 311 away from the connecting rod 312 may be detachably connected to the lower end of the first rod, and one end of the second connector 313 away from the connecting rod 312 may be detachably connected to the upper end of the second rod, so as to facilitate maintenance and replacement of the electromagnetic wave emitting apparatus 3. More specifically, the upper end of the first joint 311 and the lower end of the second joint 313 may be formed with external threads or internal threads to achieve detachable connection with the first rod body and the second rod body, respectively.
More specifically, the accommodating space 314 is an annular space formed around the hollow runner 315, and is disposed through two ends of the connecting rod 312, the lower end of the first joint 311 extends into the accommodating space 314 from the upper end of the connecting rod 312 and is in threaded connection, the upper end of the second joint 313 extends into the accommodating space 314 from the lower end of the connecting rod 312 and is in threaded connection, meanwhile, the portion of the first joint 311 extending into the accommodating space 314 includes a first threaded section and a first sealing section, an external thread is formed on the first threaded section, an internal thread is formed on the inner wall of the accommodating space 314 disposed corresponding to the first threaded section, a first sealing ring 33 is sleeved on the first sealing section, the portion of the second joint 313 extending into the accommodating space 314 includes a second threaded section and a second sealing section, an external thread is formed on the second threaded section, an internal thread is formed on the inner wall of the accommodating space 314 disposed corresponding to the second threaded section, and a second sealing ring 34 is sleeved on the second sealing section.
In the embodiment of the present application, the electromagnetic wave emitting assembly 32 includes an electromagnetic wave oscillator 321, a directional emitting antenna 322 and an energy storage power source 323, and the directional emitting antenna 322 and the energy storage power source 323 are electrically connected with the electromagnetic wave oscillator 321, respectively. The energy storage power supply 323 provides an energy source for the electromagnetic wave oscillator 321, the electromagnetic wave oscillator 321 generates a high-frequency current with certain frequency and intensity, the directional transmitting antenna 322 converts the high-frequency current into electromagnetic waves, and the transmitting direction is designated, so that the electromagnetic waves can propagate for a longer distance.
Specifically, the energy storage power supply 323, the electromagnetic wave oscillator 321 and the directional transmitting antenna 322 are sequentially arranged in the accommodating space 314 from bottom to top, and in order to fix the directional transmitting antenna 322, a limiting hole into which the directional transmitting antenna 322 extends is formed in the first connector 311 positioned at the upper end of the connecting rod body 312.
In order to achieve the above object, a third aspect of the present application provides a drilling apparatus, wherein the drilling apparatus comprises a device for reinforcing the strength of the wall of a well according to the above, based on electromagnetic waves. Because the drilling equipment adopts all the technical schemes of the above embodiments, the drilling equipment at least has all the beneficial effects brought by the technical schemes of the above embodiments, and the description is omitted here.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash memory (flashRAM). Memory is an example of a computer-readable medium.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transshipment) such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.

Claims (8)

1. The method for reinforcing the strength of the surrounding rock of the well wall based on the electromagnetic waves is characterized by comprising the following steps of:
pumping enhanced drilling fluid under the condition that the current drilling stratum is determined to be a fractured or fractured stratum, wherein the enhanced drilling fluid comprises a curing agent, an initiator and drilling fluid, the mass fraction of the curing agent in the enhanced drilling fluid is 1-20%, and the mass fraction of the initiator is 0.1-5% of the mass of the curing agent;
transmitting electromagnetic waves to the current drilling stratum to activate the initiator so as to generate a crosslinking curing reaction between the initiator and the curing agent;
the transmitting electromagnetic waves to the currently drilled formation activates the initiator to cause a cross-linking curing reaction of the initiator with the curing agent comprising:
the method comprises the steps that a device for strengthening the surrounding rock strength of a well wall of a well based on electromagnetic waves is placed in a current well formation, wherein the device comprises a drill rod body and an electromagnetic wave transmitting device (3), the drill rod body comprises a first drill rod (1) and a second drill rod (2), the electromagnetic wave transmitting device comprises a transmitting drill rod nipple (31) formed with a containing space (314) and an electromagnetic wave transmitting assembly (32) sealed in the containing space (314), two ends of the transmitting drill rod nipple (31) are detachably connected with the first drill rod (1) and the second drill rod (2) of the drill rod body in one-to-one correspondence respectively, and the electromagnetic wave transmitting assembly (32) is used for directionally transmitting electromagnetic waves;
and controlling the electromagnetic wave emitting device to emit electromagnetic waves directionally at a preset frequency to activate the initiator so as to enable the initiator and the curing agent to generate a crosslinking curing reaction.
2. The method for reinforcing the strength of a borehole wall surrounding rock based on electromagnetic waves according to claim 1, wherein the curing agent is a free radical polymer, and the initiator is a peroxide or azo compound.
3. The method for reinforcing the strength of the wall surrounding rock of the well drilling based on the electromagnetic waves according to claim 1 or 2, wherein the method for reinforcing the strength of the wall surrounding rock of the well drilling based on the electromagnetic waves further comprises:
and determining whether the current drilling stratum is a broken stratum or a fractured stratum according to the real-time drilling data.
4. The method of claim 3, wherein the real-time drilling data is at least one of pump pressure change data, size of returned cuttings, logging while drilling data, and radioactive tracer logging data.
5. An apparatus for reinforcing the strength of a borehole wall surrounding rock based on electromagnetic waves, wherein the apparatus is applied to the method for reinforcing the strength of a borehole wall surrounding rock based on electromagnetic waves according to any one of claims 1 to 4, and comprises:
the drill rod body comprises a first drill rod (1) and a second drill rod (2);
the electromagnetic wave transmitting device (3) comprises a transmitting drill pipe nipple (31) provided with a containing space (314) and an electromagnetic wave transmitting assembly (32) sealed in the containing space (314), wherein two ends of the transmitting drill pipe nipple (31) are respectively connected with the first drill pipe (1) and the second drill pipe (2) in a one-to-one correspondence manner, and the electromagnetic wave transmitting assembly (32) is used for directionally transmitting electromagnetic waves.
6. The device for strengthening the strength of the surrounding rock of the well wall of a well based on electromagnetic waves according to claim 5, wherein the transmitting drill pipe nipple (31) comprises a first joint (311), a connecting rod body (312) and a second joint (313), the accommodating space (314) is formed in the connecting rod body (312), the first joint (311) and the second joint (313) are respectively arranged at two ends of the connecting rod body (312) and seal the accommodating space (314), the first joint (311), the connecting rod body (312) and the second joint (313) are sequentially communicated to form a hollow runner (315) for drilling fluid to flow through, and one ends, far away from the connecting rod body (312), of the first joint (311) and the second joint (313) are respectively connected with the first drill pipe (1) and the second drill pipe (2) in a one-to-one correspondence.
7. The device for reinforcing the strength of a borehole wall surrounding rock based on electromagnetic waves according to claim 5, wherein the electromagnetic wave transmitting assembly (32) comprises an electromagnetic wave oscillator (321), a directional transmitting antenna (322) and an energy storage power supply (323), and the directional transmitting antenna (322) and the energy storage power supply (323) are respectively electrically connected with the electromagnetic wave oscillator (321).
8. A drilling apparatus comprising a device for reinforcing the strength of a borehole wall surrounding rock based on electromagnetic waves according to any one of claims 5 to 7.
CN202210679286.5A 2022-06-10 2022-06-15 Method and device for strengthening surrounding rock strength of well wall of well drilling based on electromagnetic waves Active CN114961635B (en)

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