CN214221088U - Device for drilling and modifying hot dry rock reservoir - Google Patents
Device for drilling and modifying hot dry rock reservoir Download PDFInfo
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- CN214221088U CN214221088U CN202022830714.9U CN202022830714U CN214221088U CN 214221088 U CN214221088 U CN 214221088U CN 202022830714 U CN202022830714 U CN 202022830714U CN 214221088 U CN214221088 U CN 214221088U
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Abstract
The utility model discloses a device for drilling and transforming a hot dry rock reservoir, which comprises a drill bit, a micropore drilling device, a power nipple, an upper joint, a connecting joint string and a continuous oil pipe which are connected in sequence; the device can also comprise a downhole measurement while drilling tool, a direction finder and a downhole thruster; the drill bit is provided with a front nozzle; a plugging column is arranged in the center of the interior of the drill bit, and a spring is sleeved on the plugging column; the side wall of the micropore drilling device is provided with a plurality of lateral nozzles; the inner wall of the micropore drilling device is sleeved with a control sleeve, and the center of the control sleeve is provided with a flow passage. The utility model discloses can spray the transformation to the low or poor hot reservoir of connectivity of the hot reservoir of natural crack development in the main well bore and main well bore in crack quantity respectively, can increase and reform transform the volume, reduce the microseism risk, still can cooperate the chemical stimulation method to implement, improve and reform transform the effect.
Description
Technical Field
The utility model relates to a hot dry rock probing technical field, more specifically the device that relates to a hot dry rock reservoir is reformed transform in probing that says so.
Background
The dry heat rock is a green clean energy source which is inexhaustible, and in the development process of the dry heat rock, an injection and production well is usually drilled, and a dry heat rock reservoir is transformed so as to increase the heat exchange volume and enhance the connectivity of the reservoir.
The methods commonly used today are hydraulic fracturing, chemical and thermal stimulation, etc. The hydraulic fracturing method has great influence on the stratum, micro-earthquakes are easy to generate, the heat exchange area of the formed single high-permeability fracture is small, and meanwhile, the direction control is difficult. The thermal stimulation method closes part of cracks along with the temperature rising after the thermal stimulation is finished. Chemical stimulation reacts with rock mass minerals quickly in a high-temperature environment, is difficult to permeate deep parts of a heat reservoir, and causes corrosive damage to an underground casing string.
Therefore, in order to change the existing technical defects and simultaneously deal with different situations of crack development and non-development in the main borehole, how to provide a device capable of effectively drilling and modifying a hot dry rock reservoir is a problem to be solved by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a device of hot dry rock reservoir is reformed transform in probing aims at solving above-mentioned technical problem.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an apparatus for drilling a dry hot rock reservoir, comprising: the drilling head, the micropore drilling device, the power short section, the upper joint, the connecting joint string and the continuous oil pipe are connected in sequence;
the bottom of the drill bit is provided with a plurality of front-end nozzles; a plugging column is arranged in the center of the drill bit, and a spring is sleeved on the plugging column; the micro-hole drilling device is of a cylindrical structure with two open ends, a plurality of lateral nozzles are uniformly distributed on the side wall close to the power nipple in the circumferential direction, and the lateral nozzles are communicated with the interior of the micro-hole drilling device; the inner side wall of the micropore drilling device is connected with a control sleeve in a sliding way, the axis of the control sleeve is provided with a flow passage, two ends of the flow passage penetrate through the control sleeve, and the flow passage corresponds to the plugging column; and the coiled tubing is connected with a bottom drilling tool assembly consisting of an upper joint, a power nipple and a drill bit through the connecting joint string.
Through the technical scheme, the utility model discloses a high pressure water conservancy sprays broken rock device, become behind the well with continuous oil pipe, equipment such as instrument are reformed transform to the micropore in the pit is transferred to the shaft bottom, through mixing the high pressure abrasive material efflux pump sending of accomplishing to the shaft bottom with ground, spout broken rock to the target interval, through the switching of the mobile control side direction nozzle of control cover in the micropore drilling rig, deepen near the crack of pit shaft, make pit shaft and the original crack intercommunication in the stratum simultaneously, form crack type net, the device passes through the position of discharge capacity regulation control cover, realize the switching of front end nozzle and side direction nozzle and spray, and then accomplish near the crack deepening of pit shaft, improve and reform transform the effect.
Preferably, in the device for drilling and modifying the hot dry rock reservoir, the flow channel is a two-stage stepped hole, and the aperture of the flow channel at one end facing the power nipple is larger than that at one end facing the plugging column; the aperture of one end of the flow passage facing the plugging column is smaller than the diameter of the plugging column. The spraying and plugging functions of the flow channel can be met.
Preferably, in the device for drilling and reforming the hot dry rock reservoir, the end face of the plugging column is flush with the end face of the microporous drilling device facing the drill bit direction; the length of the control sleeve is smaller than the length from the end face of the micropore drilling device facing the drill bit direction to the lateral nozzle. The switching function of the control sleeve to the front end nozzle and the lateral nozzle can be met.
Preferably, in the device for drilling and modifying the hot dry rock reservoir, the injection end of the coiled tubing is connected with a jet mixing and pressurizing device and a mud pump, and the source of the fluid can be switched through a surface manifold. The pressure supply requirement of slurry injection can be met.
Preferably, in the above apparatus for drilling a modified hot dry rock reservoir, the lateral wall of the micro-hole drilling rig has an outer pin hole, and the outer pin hole is located between the lateral nozzle and the end face of the micro-hole drilling rig facing the power sub; the side wall of the control sleeve is provided with an inner pin hole corresponding to the outer pin hole. After drilling is finished, drilling media are switched into high-pressure abrasive jet flow from drilling fluid through a ground manifold, the control sleeve is pushed to descend by increasing the discharge capacity, the control sleeve descends to the bottom after a pin is cut off, a front-end nozzle on a drill bit is blocked, then a lateral nozzle on a micropore drilling device starts to work, micropores can be formed on the side wall of the micropores continuously through the high-pressure jet flow, and the transformation effect is improved. The pin can satisfy the stability of the control sleeve in the drilling process, prevents that it from causing the shutoff to the front end nozzle when directional sidetracking from leading to the drilling fluid can't wash shaft bottom detritus.
The utility model provides a drilling method of device of drilling transformation dry heat rock reservoir mainly carries out the drilling transformation to the hot reservoir that natural fracture develops in the main borehole, including following step:
s1, after a main well bore is drilled, the device for drilling and transforming the dry hot rock reservoir is put into an interval to be transformed, high-pressure abrasive jet is mixed and pressurized on the ground through jet mixing and pressurizing equipment, and is sent to a micropore drilling rig through a continuous pipe, a control sleeve is driven by the high-pressure abrasive jet with large displacement to cut off a pin and then move towards a drill bit, so that a blocking column blocks a flow passage, the flow passage at a lateral nozzle is opened, and the high-pressure abrasive jet sprays and breaks rocks on a target interval through the lateral nozzle to form cracks and deepen;
s2, after the step S1 is completed, stopping jetting or reducing jet flow discharge, pushing the control sleeve to reset through a spring, plugging the lateral nozzles, opening the front end nozzle, lifting or lowering the coiled tubing to enable the device for drilling and reforming the dry and hot rock reservoir to reach the next layer section to be reformed, repeating the steps S1 and S2, and gradually completing the multi-section reforming of the dry and hot rock reservoir until the reforming requirements are met.
The utility model also provides an improved device for drilling and reforming the hot dry rock reservoir on the basis of the device for drilling and reforming the hot dry rock reservoir, which comprises the device for drilling and reforming the hot dry rock reservoir; the device also comprises a bottom while-drilling measuring tool, a direction finder and a bottom thruster which are sequentially connected between the upper joint and the connecting joint string, and adopts mud pulse transmission control; or the device also comprises a direction finder, a downhole measurement while drilling tool and a downhole thruster which are connected between the upper connector and the connecting connector string, and adopts cable transmission control.
According to the technical scheme, the device drives the device for drilling and reforming the hot dry rock reservoir to rotate to the preset adjusted tool face angle and then lock, so that the drilling direction is adjusted; through mixing the high-pressure abrasive material efflux pump sending of accomplishing with ground to the shaft bottom, spout broken rock to the target interval, through the removal in the control cover micropore drilling ware, the switching of control side direction nozzle deepens near the pit shaft crack, make the pit shaft and the original crack in the stratum intercommunication simultaneously, form crack type net, the device passes through the position of injection pressure adjustment control cover, realizes the switching of front end nozzle and side direction nozzle and spouts and spout, and then accomplish near the crack deepening of pit shaft, improve and reform transform the effect.
Preferably, in the device for drilling and modifying the hot dry rock reservoir, the ground is further provided with ground measurement and control equipment which decodes data uploaded by a downhole measurement-while-drilling tool and issues technical personnel instruction codes to the direction finder and the downhole thruster. The near-bottom measurement while drilling tool can measure well deviation, direction, tool face angle, temperature and other data in real time, transmit the measured parameters to ground measurement and control equipment through mud pulse or underground cable, and send further instructions by ground technicians.
The utility model discloses a drilling method of modified device of probing transformation dry heat rock reservoir mainly carries out the probing transformation to the low or poor hot reservoir of connectivity of main well internal fracture quantity, including following step:
s1, the improved device for drilling and reforming the dry hot rock reservoir is put into a well logging display natural fracture development section for directional sidetracking, a high-pressure drilling fluid is used for driving a power short section to drive a drill bit to carry out rotary or percussion drilling on the dry hot rock reservoir to break rock, a new micro well bore is drilled, a well bottom measurement-while-drilling tool in the drilling process uploads measured well bore track parameters to the ground, the well bottom measurement-while-drilling tool judges whether the orientation is needed or not after resolving through ground measurement and control equipment, continuous oil pipe orientation operation is carried out if the orientation is needed, drilling fluid pressure pulse or cable signals are generated through the ground measurement and control equipment and are transmitted to an operation director, the direction director rotates a tool face angle to a planned position and then locks the tool face angle, and sliding orientation drilling operation is carried out;
s2, in the micro branch well drilling process in the step S1, a mud pump pressurizes the drilling fluid and then injects the drilling fluid into the continuous oil pipe, the mud enters the drill bit from the flow channel of the control sleeve, is sprayed to the bottom of the well through a front end nozzle, and is sprayed to the bottom of the side well drilling well to break rocks;
s3, after the micro branch well bore in the step S1 is drilled, the well entering fluid is switched from the drilling fluid to high-pressure abrasive jet after being mixed and pressurized by jet mixing and pressurizing equipment through a ground manifold, the control sleeve is driven to move towards the direction of a drill bit by increasing the jet discharge capacity, so that the blocking column blocks the flow channel, the outer side wall of the control sleeve descends to open the flow channel at the lateral nozzle, the high-pressure jet is sprayed to the surrounding well wall through the lateral nozzle to deepen cracks near a target interval;
s4, after the step S3 is completed, stopping jetting or reducing jet flow discharge, pushing the control sleeve to reset through a spring, plugging the lateral nozzles, opening the front end nozzle, lifting or lowering the coiled tubing to enable the device for drilling and reforming the dry and hot rock reservoir to reach the next layer section to be reformed, repeating the steps S1 and S2, and gradually completing the multi-section reforming of the dry and hot rock reservoir until the reforming requirements are met.
And evaluating the fracture distribution condition of the thermal reservoir through the logging results of imaging logging, double lateral resistivity logging and acoustic remote detection. The two devices for drilling and reforming the dry hot rock reservoir are adopted according to the fracture distribution condition of the hot reservoir, and have stronger use pertinence and better effect.
Can know via foretell technical scheme, compare with prior art, the utility model discloses a device of hot dry rock reservoir is reformed transform in probing has following beneficial effect:
1. the utility model discloses a device and corresponding method of two kinds of probing transformation dry heat rock reservoir are according to the hot reservoir fracture distribution condition and to adopting, can be respectively to the hot reservoir that natural fracture develops in the main well bore and the low or poor hot reservoir of connectivity of the internal fracture quantity of main well bore carry out the probing transformation, can increase and reform transform the volume, reduce the microseism risk, still can cooperate the chemical stimulation method to implement, improve and reform transform the effect.
2. The device adopts high-pressure abrasive jet flow to carry out lateral jet rock breaking, communicates the original fractures of the stratum, forms a volume fracture network and reforms a dry and hot rock reservoir; the power driving device of the drilling fluid can be used for rotating or impacting to drive the drill bit to perform directional drilling.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a device for drilling and reforming a hot dry rock reservoir according to embodiment 1 provided by the present invention.
Fig. 2 is a schematic structural diagram of a device for drilling and reforming a hot dry rock reservoir by adopting mud pulse transmission control, which is provided by the utility model and is obtained in embodiment 2.
Fig. 3 is a schematic structural diagram of a device for drilling and reforming a hot dry rock reservoir by cable transmission control according to embodiment 3 of the present invention.
Fig. 4 is a schematic diagram of the working state and the external control structure according to embodiments 1 to 3 of the present invention.
Fig. 5 is a schematic structural diagram of a power nipple driving drilling operation state according to embodiments 1 to 3 of the present invention.
Fig. 6 is a schematic structural diagram of a side injection operating state according to embodiments 1 to 3 of the present invention.
Fig. 7 is a schematic structural diagram of a lower spray operating state according to embodiments 1 to 3 of the present invention.
Wherein:
1-a drill bit; 2-a micro-pore drilling rig; 3-a power nipple; 4-upper joint; 5-connecting the connector string; 6-coiled tubing; 7-front end nozzle; 8-plugging the column; 9-a spring; 10-a lateral nozzle; 11-a control sleeve; 12-a flow channel; 13-jet mixing and pressurizing equipment; 14-a slurry pump; 15-downhole measurement while drilling tools; 16-an orienter; 17-a downhole thruster; and 18-ground measurement and control equipment.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1:
referring to the attached figure 1, the embodiment of the utility model discloses a device of drilling transformation dry heat rock reservoir includes: the drilling tool comprises a drill bit 1, a micropore drilling rig 2, a power short section 3, an upper joint 4, a connecting joint string 5 and a continuous oil pipe 6 which are connected in sequence;
the bottom of the drill bit 1 is provided with a plurality of front end nozzles 7; a plugging column 8 is arranged in the center of the interior of the drill bit 1, and a spring 9 is sleeved on the plugging column 8; the micro-hole drilling device 2 is of a cylindrical structure with two open ends, a plurality of lateral nozzles 10 are uniformly distributed on the side wall close to the power nipple 3 in the circumferential direction, and the lateral nozzles 10 are communicated with the interior of the micro-hole drilling device 2; the inner side wall of the micropore drilling device 2 is connected with a control sleeve 11 in a sliding way, the axis of the control sleeve 11 is provided with a flow passage 12, two ends of the flow passage 12 penetrate through the control sleeve 11, and the flow passage 12 corresponds to the plugging column 8; the coiled tubing 6 is connected with a bottom hole assembly consisting of an upper joint 4, a power nipple 3, a micropore drilling rig 2 and a drill bit 1 through a connecting joint string 5.
In order to further optimize the technical scheme, the flow channel 12 is a two-stage stepped hole, and the aperture of the end, facing the power nipple 3, of the flow channel 12 is larger than that of the end, facing the plugging column 8, of the flow channel 12; the aperture of the flow channel 12 facing one end of the plugging column 8 is smaller than the diameter of the plugging column 8.
In order to further optimize the technical scheme, the end face of the plugging column 8 is flush with the end face of the micropore drilling device 2 facing to the direction of the drill bit 1; the length of the control sleeve 11 is smaller than the length of the end face of the micro-hole drilling rig 2 facing the drill bit 1 to the lateral nozzle 10.
In order to further optimize the technical scheme, a jet mixing pressurization device 13 and a slurry pump 14 which can switch the fluid source through a ground manifold are connected to the injection end of the continuous oil pipe 6.
In order to further optimize the technical scheme, the side wall of the micro-hole drilling device 2 is provided with an outer pin hole, and the outer pin hole is positioned between the lateral nozzle 10 and the end face, facing the power nipple 3, of the micro-hole drilling device 2; the side wall of the control sleeve 11 has an inner pin hole corresponding to the outer pin hole.
The method for drilling and modifying the dry hot rock reservoir aims at performing drilling and modification on a hot reservoir with natural fracture development in a main borehole, and comprises the following steps:
s1, after a main well bore is drilled, the device for drilling and modifying the dry hot rock reservoir is put into an interval to be modified, high-pressure abrasive jet is mixed and pressurized on the ground through a jet mixing and pressurizing device 13 and is sent to the microporous drilling rig 2 through a continuous pipe 6, a control sleeve 11 is driven by the high-pressure abrasive jet with large discharge to cut off a pin and then move towards a drill bit 1, so that a blocking column 8 blocks a flow passage 12, the flow passage at a lateral nozzle 10 is opened, and the high-pressure abrasive jet sprays and breaks rock on the well wall of a target interval through the lateral nozzle 10 to form cracks and deepen;
s2, after the step S1 is completed, stopping jetting or reducing jet flow discharge, pushing the control sleeve 11 to reset through the spring 9, blocking the lateral nozzle 10, opening the front end nozzle 7, lifting or lowering the coiled tubing to enable the device for drilling and reforming the dry and hot rock reservoir to reach the next layer section to be reformed, repeating the steps S1 and S2, and gradually completing multi-section reforming of the dry and hot rock reservoir until the reforming requirements are met.
The device for drilling and modifying the dry and hot rock reservoir adopts high-pressure abrasive jet flow to carry out lateral injection rock breaking, communicates the original fractures of the stratum to form a volume fracture network, and modifies the dry and hot rock reservoir; the device for drilling and reforming the dry hot rock reservoir can also be driven to rotate or impact by utilizing the power of the drilling fluid, the drill bit 1 carried at the front end of the device for drilling and reforming the dry hot rock reservoir is driven to perform directional sidetrack drilling, and the structural change in the tool under different working states is shown in figures 5-7.
Example 2:
referring to fig. 2, the present embodiment is improved on the basis of embodiment 1, and further comprises a downhole measurement-while-drilling tool 15, a direction finder 16 and a downhole thruster 17 which are sequentially connected between the upper joint 4 and the connecting joint string 5, and adopts mud pulse transmission control.
In order to further optimize the technical scheme, the ground is also provided with a ground measurement and control device 18 which decodes the data uploaded by the downhole measurement while drilling tool 15 and transmits the technical instruction codes to the direction finder 16 and the downhole propeller 17.
The method for drilling and modifying the dry hot rock reservoir provided by the embodiment is used for drilling and modifying the hot reservoir with low fracture quantity or poor connectivity in the main borehole, and comprises the following steps:
s1, the improved device for drilling and reforming the dry hot rock reservoir is put into a well to log and display a natural fracture development section for directional sidetracking, the high-pressure drilling fluid is used for driving the power nipple 3 to drive the drill bit 1 to carry out rotary or percussion drilling on the dry hot rock reservoir to break rock, a new micro well bore is drilled, a well bottom measurement-while-drilling tool 15 uploads measured well bore track parameters to the ground in the drilling process, the well bottom measurement-while-drilling tool is used for judging whether the orientation is needed or not after being resolved by a ground measurement and control device 18, if the orientation operation of a continuous oil pipe is needed, drilling fluid pressure pulse or a cable signal is generated by the ground measurement and control device 18 to be transmitted downwards to operate the orientator 15, the orientator 15 rotates a tool face angle to a planned position and then locks the tool face angle, and the sliding directional drilling operation is carried out;
s2, in the micro branch well drilling process in the step S1, a mud pump 14 pressurizes the drilling fluid and then injects the drilling fluid into the continuous oil pipe 6, the mud enters the drill bit 1 from the flow channel of the control sleeve 11 and is sprayed to the bottom of the well through a front end nozzle 7, and the rock is broken by spraying on the bottom of the side well drilling well;
s3, after the micro branch well bore in the step S1 is drilled, the well entering fluid is switched from the drilling fluid to high-pressure abrasive jet after being mixed and pressurized by a jet mixing and pressurizing device 13 through a ground manifold, the control sleeve 11 is driven to move towards the direction of the drill bit 1 by increasing the jet discharge capacity, so that the blocking column 8 blocks the flow channel 12, the outer side wall of the control sleeve 11 descends to open the flow channel at the lateral nozzle 10, the high-pressure jet is sprayed to the surrounding well wall through the lateral nozzle 10, and the cracks near the target interval are deepened;
s4, after the step S3 is completed, stopping jetting or reducing jet flow discharge, pushing the control sleeve 11 to reset through the spring 9, blocking the lateral nozzle 10, opening the front end nozzle 7, lifting or lowering the coiled tubing 6 to enable the device for drilling and reforming the dry and hot rock reservoir to reach the next layer section to be reformed, repeating the steps S1 and S2, and gradually completing multi-section reforming of the dry and hot rock reservoir until the reforming requirements are met.
In order to further optimize the technical scheme, the thermal reservoir fracture distribution condition is evaluated through the logging results of imaging logging, double lateral resistivity logging and acoustic remote detection.
The ground measurement and control equipment 18 can decode a mud pulse signal or an electric signal uploaded by the downhole measurement-while-drilling tool 15 and provide the decoded signal to a technician, the technician downloads the signal to the direction finder 16 through a cable or a mud pulse according to the direction finding requirement, and the direction finder 16 drives the device for drilling and reforming the hot dry rock reservoir to rotate to a preset tool face angle and then lock, so that the drilling direction is adjusted.
The jet flow mixing and pressurizing device 13 firstly uniformly mixes the jet flow medium and the abrasive, then pressurizes the mixture to be more than 30MPa, pumps the mixture into the well through the continuous oil pipe 6, and flows through a lateral nozzle of the device for drilling and modifying the dry and hot rock reservoir to form abrasive jet flow to impact rock on the well wall, so that a hole with a certain depth is formed.
The near-bottom measurement-while-drilling tool 15 can measure well deviation, azimuth, tool face angle, temperature and other data in real time, and transmit the measured parameters to the ground measurement and control equipment 18 through mud pulse or a downhole cable, and further instructions are issued by ground technicians.
Example 3:
referring to fig. 3, the present embodiment is improved on the basis of embodiment 1, and further comprises a direction finder 16, a downhole measurement-while-drilling tool 15 and a downhole thruster 17 which are connected between the upper connector 4 and the connection connector string 5, and adopts cable transmission control.
Other structures and methods of this embodiment are the same as those of embodiment 2, and are not described herein again.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. An apparatus for drilling a dry hot rock reservoir, comprising: the drilling head (1), the micropore drilling device (2), the power nipple (3), the upper joint (4), the connecting joint string (5) and the coiled tubing (6) are connected in sequence;
a plurality of front-end nozzles (7) are annularly arranged at the bottom of the drill bit (1); a plugging column (8) is arranged in the center of the interior of the drill bit (1), and a spring (9) is sleeved on the plugging column (8); the micro-hole drilling device (2) is of a cylindrical structure with two open ends, a plurality of lateral nozzles (10) are uniformly distributed on the side wall close to the power nipple (3) in the circumferential direction, and the lateral nozzles (10) are communicated with the interior of the micro-hole drilling device (2); a control sleeve (11) is connected to the inner side wall of the micropore drilling device (2) in a sliding mode, a flow passage (12) with two ends penetrating through the control sleeve (11) is formed in the axis of the control sleeve (11), and the flow passage (12) corresponds to the plugging column (8); and the coiled tubing (6) is connected with a bottom drilling assembly consisting of the upper joint (4), the power nipple (3), the micropore drilling device (2) and the drill bit (1) through the connecting joint string (5).
2. A device for drilling and modifying a hot dry rock reservoir as claimed in claim 1, wherein the flow channel (12) is a two-stage stepped bore, and the diameter of the flow channel (12) at the end facing the power sub (3) is larger than that at the end facing the plugging column (8); the aperture of one end of the flow passage (12) facing the plugging column (8) is smaller than the diameter of the plugging column (8).
3. A device for drilling retorted hot dry rock reservoirs according to claim 1, characterized in that the end face of the plugging column (8) is flush with the end face of the micro-porous drill (2) facing the drill bit (1); the length of the control sleeve (11) is less than the length from the end face of the micropore drilling device (2) towards the direction of the drill bit (1) to the lateral nozzle (10).
4. A device for drilling and modifying a hot dry rock reservoir as claimed in claim 1, wherein the injection end of the coiled tubing (6) is connected to a jet mixing and pressurizing apparatus (13) and a mud pump (14) which can switch the fluid source through a surface manifold.
5. A device for drilling retouched hot dry rock formations according to any one of claims 1-4, characterized in that the side wall of the micro-bore drill (2) has an outer pin hole between the lateral nozzle (10) and the end face of the micro-bore drill (2) facing the power sub (3); the side wall of the control sleeve (11) is provided with an inner pin hole corresponding to the outer pin hole.
6. A device for drilling and modifying a hot dry rock reservoir as claimed in claim 1, further comprising a downhole measurement-while-drilling tool (15), a direction finder (16) and a downhole thruster (17) connected in sequence between the top sub (4) and the string of junction sub (5), and controlled by mud pulse transmission; or the device also comprises a direction finder (16), a downhole measurement-while-drilling tool (15) and a downhole thruster (17) which are connected between the upper connector (4) and the connecting connector string (5), and the direction finder is controlled by adopting cable transmission.
7. An apparatus for drilling and reforming a hot dry rock reservoir as defined in claim 6, wherein the surface is further provided with a surface measurement and control device (18) for decoding data uploaded by the downhole measurement-while-drilling tool (15) and transmitting technical instruction codes to the direction finder (16) and the downhole thruster (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022830714.9U CN214221088U (en) | 2020-11-30 | 2020-11-30 | Device for drilling and modifying hot dry rock reservoir |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022830714.9U CN214221088U (en) | 2020-11-30 | 2020-11-30 | Device for drilling and modifying hot dry rock reservoir |
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| CN214221088U true CN214221088U (en) | 2021-09-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117307156A (en) * | 2023-11-28 | 2023-12-29 | 中煤科工开采研究院有限公司 | Dual high pressure jet and method of use |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117307156A (en) * | 2023-11-28 | 2023-12-29 | 中煤科工开采研究院有限公司 | Dual high pressure jet and method of use |
| CN117307156B (en) * | 2023-11-28 | 2024-04-09 | 中煤科工开采研究院有限公司 | Dual high pressure jet and method of use |
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