CN113513285B - Large-drop mountain directional drilling mud plugging system and method and electronic equipment - Google Patents
Large-drop mountain directional drilling mud plugging system and method and electronic equipment Download PDFInfo
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- CN113513285B CN113513285B CN202110441090.8A CN202110441090A CN113513285B CN 113513285 B CN113513285 B CN 113513285B CN 202110441090 A CN202110441090 A CN 202110441090A CN 113513285 B CN113513285 B CN 113513285B
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- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
- E21B33/05—Cementing-heads, e.g. having provision for introducing cementing plugs
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- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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- 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
- E21B47/06—Measuring temperature or pressure
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- 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
- E21B7/04—Directional drilling
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- 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
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
Abstract
The invention belongs to the technical field of pipeline crossing engineering, and particularly relates to a mud blocking system, a mud blocking method and electronic equipment for directional drilling of a large-fall mountain, aiming at solving the problem of poor mud blocking effect in the crossing of the large-fall mountain; the system comprises a reaming assembly, a slurry plugging assembly and an auxiliary bearing assembly, wherein the auxiliary bearing assembly is arranged outside the reaming assembly to bear the reaming assembly; the reaming assembly comprises a reaming device and a drill rod; the mud plugging assembly comprises an isolation sleeve and a rotary blowout preventer, wherein the isolation sleeve is sleeved with the drill rod, one end of the isolation sleeve extends into the rock mass soil-entering point, and the other end of the isolation sleeve is arranged in a hanging manner; the rotary blowout preventer is arranged at the end part of the isolation sleeve far away from the rock mass soil entering point and is in abutting sealing connection with the isolation sleeve through a connecting assembly; a positioning assembly for performing center positioning on the drill rod is arranged inside the isolation sleeve; the invention can realize effective water permeable plugging of large-fall mountain.
Description
Technical Field
The invention belongs to the technical field of pipeline crossing engineering, and particularly relates to a large-fall mountain directional drilling mud plugging system and method and electronic equipment.
Background
After the horizontal directional drilling-through is introduced to China since the middle of the 80 s, the construction technology is developed more and more mature, and the types of stratum to be penetrated are various, wherein the mountain directional drilling-through technology has high requirements, more construction difficulties and higher penetration risks. Particularly, when the large-fall mountain directional drilling is carried out, the large-fall mountain is faced with the serious problems that the mud system is damaged by permeable dilution of the mountain, no mud exists in a hole due to the large fall, and an anticorrosive coating of a drilling tool and a pipeline is abraded.
For mountain body water permeability, a plugging agent is generally adopted for plugging, and if mountain body cracks and water permeability are large, the effect of the plugging agent is poor, and effective plugging cannot be realized. In addition, a large-fall mountain body can have a long-distance mud-free hole, so that the drilling tool is abraded too fast, and drill cuttings are accumulated; the pipeline loses buoyancy and lubrication when being dragged back, the friction force is increased, and the anticorrosive coating is abraded. There is currently no good solution to these problems.
Disclosure of Invention
In order to solve the problems, namely to solve the problem of poor slurry plugging effect in the crossing process of the large-drop mountain directional drilling, the invention provides a large-drop mountain directional drilling slurry plugging system, a large-drop mountain directional drilling slurry plugging method and electronic equipment.
The invention provides a mud plugging system for directional drilling of a large-fall mountain, which is used for mud plugging in a reaming process and is characterized by comprising a reaming component, a mud plugging component and an auxiliary bearing component, wherein the auxiliary bearing component is arranged outside the reaming component to bear an overhanging section of the reaming component; the reaming assembly comprises a reaming device and a drill rod, and the drill rod is arranged at the tail end of the reaming device;
the mud plugging assembly comprises an isolation sleeve and a rotary blowout preventer, wherein the isolation sleeve is sleeved on the drill rod, one end of the isolation sleeve extends into a rock mass soil-entering point, and the other end of the isolation sleeve outwards overhangs; the rotary blowout preventer is arranged at the end part, far away from the rock body soil-entering point, of the isolation sleeve, and the rotary blowout preventer is in butt sealing connection with the isolation sleeve through a connecting assembly;
a positioning assembly used for performing center positioning on the drill rod is arranged inside the isolation sleeve, the positioning assembly comprises a plurality of center positioning devices, and the center positioning devices are sequentially arranged along the longitudinal direction of the drill rod; the central positioning device comprises a sleeve structure and a central positioning structure, and the central positioning structure is fixedly connected with the sleeve structure; and a through hole for the drill rod to penetrate through is formed in the central positioning structure.
In some preferred embodiments, the central positioning structure comprises a first annular structure and a second annular structure, the peripheral side of the first annular structure is provided with a plurality of spoke structures so as to be fixedly connected with the inner wall of the second annular structure; the inner diameter of the first annular structure and the inner diameter of the casing structure are both larger than the outer diameter of the drill rod;
the sleeve structure comprises a first section of sleeve and a second section of sleeve, and the first section of sleeve and the second section of sleeve are respectively and fixedly connected to two sides of the first annular structure; the end, far away from first annular structure, of first section sleeve pipe is equipped with first flange portion, the end, far away from first annular structure, of second section sleeve pipe is equipped with second flange portion, first flange portion and/or second flange portion be used for with adjacent central positioner connects.
In some preferred embodiments, the outer diameter of the second annular structure is less than the inner diameter of the isolation sleeve;
the outer wall of the second annular structure is provided with an elastic part, and the elastic part is abutted against the isolation sleeve;
the first section of sleeve pipe, the inside of second section of sleeve pipe all is provided with annular elastic component, annular elastic component with the drilling rod is contradicted and is set up.
In some preferred embodiments, the auxiliary load bearing assembly is a load bearing platform; the distance from the top of the bearing platform to the ground is h1, the radius of the drill rod is R, the distance from the longitudinal axis of the drill rod to the ground is h2, and h2 is h1+ R.
In some preferred embodiments, the length of the isolation sleeve embedded in the rock mass is L1, the total length of the isolation sleeve is L, the ratio of L1 to L is k, k epsilon (0.2, 0.25); the connecting assembly is a flange.
In some preferred embodiments, the auxiliary bearing assembly comprises an auxiliary sleeve and a support rod, the auxiliary sleeve is sleeved on the drill rod arrangement; the top of the supporting rod is provided with a concave arc contact part matched with the outer contour of the auxiliary sleeve, the bottom of the supporting rod is provided with a base, and the base is equidistantly penetrated with a ground pin fixing column; the distance from the longitudinal axis of the auxiliary sleeve to the ground is H1, the distance from the longitudinal axis of the drill rod to the ground is H2, and H1 is H2.
In some preferred embodiments, the system further comprises a general control center, a pressure detection device and a sewage discharge device, wherein the pressure detection device and the sewage discharge device are in signal connection with the general control center;
the top of the isolation sleeve is provided with a first communication hole; the pressure detection device is arranged in the first communication hole and communicated with the inside of the isolation sleeve to detect pressure information inside the isolation sleeve;
the bottom of the isolation sleeve is provided with a second communicating hole; the sewage draining device comprises a sewage draining pipe and a sewage draining control switch, the sewage draining pipe is arranged in the second communicating hole and communicated with the inside of the isolation sleeve, and the sewage draining control switch is arranged in the sewage draining pipe to control the on-off of the sewage draining pipe and the outside;
in the working process, the pressure detection device detects the pressure value inside the isolation sleeve in real time, and when the pressure value is greater than a preset pressure threshold value, the master control center controls the sewage discharge control switch to open the sewage discharge pipe to be communicated with the outside and discharge sewage; when the pressure value inside the isolation sleeve detected by the pressure detection device in real time is smaller than a preset pressure threshold value, the master control center controls the pollution discharge control switch to close the pollution discharge pipe.
The invention provides a large-drop mountain directional drilling mud plugging method, which is based on the large-drop mountain directional drilling mud plugging system and comprises the following steps: step S100, carrying out hole expansion work of a preset distance at the soil entry point along the extension direction of the guide hole according to the outer diameter of the isolation sleeve by using the hole expansion assembly; an isolation sleeve, a positioning assembly, a rotary blowout preventer and an auxiliary bearing assembly are arranged on the outer side of the drill rod, and the inside of the isolation sleeve is sealed with the outside through the rotary blowout preventer;
the hole expanding component expands holes towards the unearthing point;
step S200, a pressure detection device detects pressure information inside the isolation sleeve in real time, and if the pressure information is larger than a preset pressure threshold value, a master control center controls a pollution discharge control switch to open a pollution discharge pipe to be communicated with the outside and discharge pollution; when the pressure value inside the isolation sleeve detected by the pressure detection device in real time is smaller than a preset pressure threshold value, the master control center controls the pollution discharge control switch to close the pollution discharge pipe.
In a third aspect of the present invention, an electronic device is provided, including: at least one processor; and a memory communicatively coupled to at least one of the processors; wherein the memory stores instructions executable by the processor for execution by the processor to implement the high-fall mountain directional drilling mud plugging method.
In a fourth aspect of the present invention, a computer-readable storage medium is provided, where the computer-readable storage medium stores computer instructions for being executed by the computer to implement the method for directional drilling and mud plugging for large-drop mountain.
1) The slurry plugging component can effectively solve the problems of water permeation and plugging of a large-fall mountain and no slurry in a hole, inhibit the water permeation and leakage of the hole, keep the slurry content in the hole, prevent the hole from collapsing, reduce the abrasion of an anticorrosive coating of a pipeline and effectively reduce the construction risk.
2) Compared with the traditional plugging construction measure technology, the system and the method provided by the invention are easy to operate and low in cost, can play the roles of preventing a large amount of slurry at a low point from flowing outwards, inhibiting permeable water from leaking outwards and saving the slurry amount, can ensure the continuous construction of the directional drill, shorten the construction period and reduce the construction cost and the construction risk.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural diagram of an embodiment of a large-drop mountain directional drilling mud plugging system according to the present invention;
FIG. 2 is a schematic diagram of one embodiment of the centering device of FIG. 1;
FIG. 3 is a schematic structural view of another embodiment of the centering device of FIG. 1;
FIG. 4 is another angular schematic view of the centering device of FIG. 1;
fig. 5 is an overall schematic view of an embodiment of the large-fall mountain directional drilling mud plugging system in the working state.
The description of the reference numbers follows in order:
100. a drill stem; 200. an isolation sleeve; 300. rotating the blowout preventer; 400. a centering device, 411, a first annular structure, 412, a second annular structure, 413, a spoke structure; 421. a first section of sleeve pipe 422, a second section of sleeve pipe 423 and an annular elastic piece; 430. a damping member; 500. an auxiliary load bearing assembly; 600. a pressure detection device 610, a sealing device; 700. a sewage draining device; 800. rock mass 810, soil entry point 820, soil exit point; 900. a directional hole; 1000. mud shutoff subassembly.
Detailed Description
In order to make the embodiments, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
The invention provides a mud plugging system for directional drilling of a large-fall mountain, which is used for mud plugging in a reaming process and comprises a reaming component, a mud plugging component and an auxiliary bearing component, wherein the auxiliary bearing component is arranged outside the reaming component to bear an overhanging section of the reaming component; the reaming assembly comprises a reaming device and a drill rod, and the drill rod is arranged at the tail end of the reaming device and is used for reaming along the directional hole; the mud plugging assembly comprises an isolation sleeve and a rotary blowout preventer, wherein the isolation sleeve and the rotary blowout preventer are sleeved with the drill rod, one end of the isolation sleeve extends into a rock mass soil-entering point, the other end of the isolation sleeve outwards stretches, and the isolation sleeve is used for connecting the hole and the rotary blowout preventer and storing and cleaning drill cuttings; the rotary blowout preventer is arranged at the end part, far away from the rock body soil-entering point, of the isolation sleeve, and is in abutting sealing connection with the isolation sleeve through a connecting assembly; the auxiliary sleeve further stabilizes and supports the drill rod, reduces the upward and downward swing of the drill rod on the side of the drilling machine, reduces the unbalanced pressure of the rotating blowout preventer, improves the sealing effect and prolongs the sealing time; a positioning assembly for performing central positioning on the drill rod is arranged in the isolation sleeve and used for keeping the stability of the drill rod in the isolation sleeve and reducing the abrasion to a rotating blowout preventer rubber ring; the positioning assembly comprises a plurality of central positioning devices which are sequentially arranged along the longitudinal direction of the drill rod; the central positioning device comprises a sleeve structure and a central positioning structure, and the central positioning structure is fixedly connected with the sleeve structure; the inside through-hole that supplies the drilling rod to run through that is provided with of center location structure.
Furthermore, the system also comprises a master control center, a pressure detection device and a sewage discharge device, wherein the pressure detection device and the sewage discharge device are in signal connection with the master control center; the top of the isolation sleeve is provided with a first communication hole; the pressure detection device is arranged in the first communication hole and communicated with the inside of the isolation sleeve to detect pressure information inside the isolation sleeve; the bottom of the isolation sleeve is provided with a second communicating hole; the pollution discharge device comprises a pollution discharge pipe and a pollution discharge control switch, the pollution discharge pipe is arranged in the second communication hole and is communicated with the inside of the isolation sleeve, and the pollution discharge control switch is arranged in the pollution discharge pipe to control the connection and disconnection between the pollution discharge pipe and the outside and is used for adjusting pressure and discharging drill chip debris; in the working process, the pressure detection device detects the pressure value inside the isolation sleeve in real time, and when the pressure value is greater than a preset pressure threshold value, the master control center controls the pollution discharge control switch to open the pollution discharge pipe to be communicated with the outside and discharge pollution; when the pressure value inside the isolation sleeve detected by the pressure detection device in real time is smaller than the preset pressure threshold value, the main control center controls the pollution discharge control switch to close the pollution discharge pipe.
The invention is further described with reference to the following detailed description of embodiments with reference to the accompanying drawings.
Referring to fig. 1 and 5, fig. 1 is a schematic structural diagram of an embodiment of a large-drop mountain directional drilling mud plugging system in the present invention, and fig. 5 is an overall schematic diagram of an embodiment of a large-drop mountain directional drilling mud plugging system in a working state in the present invention; the invention provides a directional drilling mud plugging system for a large-fall mountain, which is used for reaming in a directional hole 900 and used for mud plugging in the reaming process and comprises a reaming assembly, a mud plugging assembly 1000 and an auxiliary bearing assembly 500, wherein the auxiliary bearing assembly is arranged outside the reaming assembly to bear an overhanging section of the reaming assembly; the reaming assembly comprises a reaming device and a drill rod 100, wherein the drill rod is arranged at the tail end of the reaming device; the mud plugging assembly comprises an isolation sleeve 200 and a rotary blowout preventer 300, wherein the isolation sleeve is sleeved with a drill rod, one end of the isolation sleeve extends into an earth inlet 810 of a rock body 800, and the other end of the isolation sleeve outwards overhangs; the rotary blowout preventer is arranged at the end part of the isolation sleeve far away from the rock mass soil entering point and is in abutting sealing connection with the isolation sleeve through a connecting assembly; a positioning assembly for performing center positioning on the drill rod is arranged in the isolation sleeve, the positioning assembly comprises a plurality of center positioning devices 400, and the center positioning devices are sequentially arranged along the longitudinal direction of the drill rod; the central positioning device comprises a sleeve structure and a central positioning structure, and the central positioning structure is fixedly connected with the sleeve structure; the inside through-hole that supplies the drilling rod to run through that is provided with of center location structure.
The system also comprises a master control center, a pressure detection device 600 and a sewage discharge device 700, wherein the pressure detection device and the sewage discharge device are in signal connection with the master control center; the top of the isolation sleeve is provided with a first communication hole; the pressure detection device is arranged in the first communication hole and communicated with the inside of the isolation sleeve to detect pressure information inside the isolation sleeve; the bottom of the isolation sleeve is provided with a second communicating hole; the sewage discharge device comprises a sewage discharge pipe and a sewage discharge control switch, the sewage discharge pipe is arranged in the second communication hole and communicated with the inside of the isolation sleeve, and the sewage discharge control switch is arranged in the sewage discharge pipe to control the on-off of the sewage discharge pipe and the outside; in the working process, the pressure detection device detects the pressure value inside the isolation sleeve in real time, and when the pressure value is greater than a preset pressure threshold value, the master control center controls the pollution discharge control switch to open the pollution discharge pipe to be communicated with the outside and discharge pollution; when the pressure value inside the isolation sleeve detected by the pressure detection device in real time is smaller than a preset pressure threshold value, the main control center controls the pollution discharge control switch to close the pollution discharge pipe.
Furthermore, the system also comprises a mud collecting device and a mud density detecting device, wherein the mud collecting device and the mud density detecting device are in signal connection with the master control center; mud collection device is used for overflowing the collection of mud at the unearthed point, carry out the automated inspection of mud sand content through mud density detection device, when mud sand content surpasses the preset content threshold value, explain downthehole piling up and produce the influence to the reaming operation, total accuse central control blow-off switch is opened the blow off pipe and is carried out filth discharge, at this moment, mud collection device, mud density detection device continues to carry out the detection of mud collection with mud sand content at the in-process of blowdown, when real-time detection's mud sand content is less than the content threshold value, total accuse central control blow-off switch closes the blow off pipe, downthehole mud content accords with the construction requirement this moment, reaming subassembly continues to work.
Checking the slurry plugging condition after plugging and installation are finished, normally reaming after no leakage, observing the change of a pressure gauge in construction, calculating the accumulation condition in a hole according to the slurry sand content and the drilling cuttings recovery condition, opening a blow-off pipe to remove the drilling cuttings when the distance of 100m is increased, installing a guniting short section to clean the drilling cuttings in the sleeve, and continuing construction after the drilling cuttings in the isolation sleeve are cleaned up
In this embodiment, the height difference between the soil entry point and the soil exit point is 90m, after the directional drilling and crossing completes the construction of the guide hole, the guide hole is permeable, because the water permeability is large, the plugging by using the composite plugging agent is ineffective, a slurry system is diluted greatly, the next reaming work cannot be performed, the permeable water needs to be plugged, and the construction progress is ensured by selecting plugging construction at the hole of the lower soil entry point in combination with the height of the soil exit point and the arrangement of the on-site reaming device.
Further, referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of the center positioning device in fig. 1, the center positioning device includes a hub pile annular structure, a first casing pipe section and a second casing pipe section, and the hub pile annular structure, the first casing pipe section and the second casing pipe section are integrally formed; the two ends of the first casing pipe section and the second casing pipe section are provided with flange structures, so that the two adjacent central positioning devices can be conveniently connected and fixed; the elastic part is arranged in the center positioning device, so that the drill rod can be guaranteed to move in the center positioning device, the friction damage to the outer wall of the drill rod can be reduced, and the coaxial precision of the drill rod and the positioning assembly can be further improved.
Further, referring to fig. 3 and 4, the center positioning structure includes a first ring-shaped structure 411 and a second ring-shaped structure 412, a plurality of spoke structures 413 are arranged on the periphery side of the first ring-shaped structure to be fixedly connected with the inner wall of the second ring-shaped structure; the inner diameter of the first annular structure and the inner diameter of the casing structure are both larger than the outer diameter of the drill rod.
Preferably, a plurality of spoke structure arrays are provided.
Further, the sleeve structure comprises a first section of sleeve 421 and a second section of sleeve 422, which are respectively fixedly connected to two sides of the first annular structure; one end of the first section of sleeve pipe, which is far away from the first annular structure, is provided with a first flange part, one end of the second section of sleeve pipe, which is far away from the first annular structure, is provided with a second flange part, and the first flange part and/or the second flange part are/is used for being connected with an adjacent central positioning device.
Preferably, the outer diameter of the second annular structure is smaller than the inner diameter of the isolation sleeve; the outer wall of the second annular structure is provided with an elastic part 430, and the elastic part is abutted against the isolation sleeve; annular elastic pieces 423 are arranged inside the first section of casing pipe and the second section of casing pipe, and the annular elastic pieces are abutted to the drill rod.
In one embodiment of the present invention, the auxiliary bearing assembly is a bearing platform; the distance from the top of the load-bearing platform to the ground is h1, the radius of the drill rod is R, the distance from the longitudinal axis of the drill rod to the ground is h2, and h2 is h1+ R.
Furthermore, the top of the bearing platform is also provided with an auxiliary sleeve, the drill rod is sleeved with the auxiliary sleeve, the bearing strength of the drill rod overhanging section is further improved, and meanwhile the center positioning of the drill rod is guaranteed.
Preferably, the length of the isolation sleeve embedded in the rock mass is L1, the total length of the isolation sleeve is L, and the ratio of L1 to L is k, k epsilon (0.2, 0.25).
Preferably, the connection assembly is a flange.
Preferably, the pressure detection means is a pressure gauge.
Further, the sealing device 610 is arranged on the outer side of the first communication hole, the sealing performance of the pressure detection device and the isolation sleeve is further improved, and slurry is prevented from overflowing from the first communication hole.
In a second embodiment of the present invention, the auxiliary bearing assembly includes an auxiliary sleeve and a support rod, the auxiliary sleeve is sleeved on the drill rod; the top of the supporting rod is provided with a concave arc contact part matched with the outer contour of the auxiliary sleeve, the bottom of the supporting rod is provided with a base, and the base is equidistantly penetrated with a ground pin fixing column; the distance from the longitudinal axis of the auxiliary casing to the ground is H1, the distance from the longitudinal axis of the drill rod to the ground is H2, and H1 is H2.
Furthermore, the bracing piece is scalable hydraulic stem, can adjust the height that different construction demands correspond in a flexible way to better bear the weight of the drilling rod.
The invention provides a large-drop mountain directional drilling mud plugging method, which comprises the following steps: step S100, carrying out hole expansion work of a preset distance at the soil entry point along the extension direction of the guide hole according to the outer diameter of the isolation sleeve by using the hole expansion assembly; an isolation sleeve, a positioning assembly, a rotary blowout preventer and an auxiliary bearing assembly are arranged on the outer side of the drill rod, and the inside of the isolation sleeve is sealed with the outside through the rotary blowout preventer; the hole expanding component expands holes towards the unearthing point; step S200, a pressure detection device detects pressure information inside the isolation sleeve in real time, and if the pressure information is larger than a preset pressure threshold value, a master control center controls a pollution discharge control switch to open a pollution discharge pipe to be communicated with the outside and discharge pollution; when the pressure value inside the isolation sleeve detected by the pressure detection device in real time is smaller than the preset pressure threshold value, the main control center controls the pollution discharge control switch to close the pollution discharge pipe.
In the construction process, firstly, a hole expanding component is utilized to carry out positive expansion on the center of the position of a guide hole according to the diameter of an isolation sleeve, and the isolation sleeve is installed after hole expansion is finished, specifically, the length of the isolation sleeve is 12m, the length of an embedded sleeve in a rock mass is 2.5m, and the length of the external sleeve is 9.5 m; the air bag can be pre-installed in the hole to block water flow, the gap between the outer wall of the sleeve and the hole wall is sealed by quick-dry cement, and the air bag is withdrawn after the completion.
After the isolation sleeve is installed and sealed, the isolation sleeve is internally provided with a center positioning structure and connected by flanges, the number of the center positioning structures is 3 in the embodiment, the stable work of a drill rod in the isolation sleeve is ensured, the extra abrasion of the drill rod to a rotating blowout preventer rubber ring is reduced, and meanwhile, the outer joint of the rotating blowout preventer is connected and sealed by the flanges of the isolation sleeve.
An auxiliary sleeve with the outer diameter of 325cm is installed at the position of the drill side, the length of the auxiliary sleeve is 6m, and the auxiliary sleeve is installed on the bearing platform and is reinforced.
The pressure gauge is arranged on the outer side of the isolation sleeve, the liquid pressure gauge of 2Mpa is selected according to the height difference, and 1 drain pipe with the size of 10cm is arranged at the tail end of the isolation sleeve.
The mud shutoff circumstances is looked over after the shutoff installation finishes, normally reams after the no leakage, observes the manometer change in the construction, according to mud sand content and drill chip recovery condition, calculates the downthehole circumstances of piling up, every expands into 100m distance, opens the blow off pipe and gets rid of the drill chip, and installation guniting nipple joint washs the inside drill chip of sleeve pipe, keeps on constructing after the isolation sleeve pipe drill chip clean up. And after the construction of each procedure is finished, checking the abrasion condition of the rubber ring, detaching the rotary blowout preventer once reaming operation is finished, replacing the reamer, and reinstalling the plugging device after clearing rock debris in the isolation sleeve.
In the directional drilling and reaming process, the system has a good slurry plugging effect, can inhibit permeable leakage of a mountain, reduces slurry dilution and saves the using amount; but also can carry out normal reaming construction and remove drill cuttings. Especially, in the back dragging of the pipeline, the content of hole slurry is ensured, the buoyancy of the pipeline is increased, the abrasion of an anticorrosive coating is reduced, and the smooth back dragging of the pipeline is ensured.
An electronic apparatus according to a third embodiment of the present invention includes: at least one processor; and a memory communicatively coupled to at least one of the processors; wherein the memory stores instructions executable by the processor for execution by the processor to implement the high-fall mountain directional drilling mud plugging method.
A computer-readable storage medium according to a fourth embodiment of the present invention stores computer instructions for being executed by the computer to implement the method for directional drilling and mud plugging for large-throw mountains.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes and related descriptions of the storage device and the processing device described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
A computer system includes a Central Processing Unit (CPU) that can perform various appropriate actions and processes according to a program stored in a Read Only Memory (ROM) or a program loaded from a storage section into a Random Access Memory (RAM). In the RAM, various programs and data necessary for system operation are also stored. The CPU, ROM, and RAM are connected to each other via a bus. An Input/Output (I/O) interface is also connected to the bus.
The following components are connected to the I/O interface: an input section including a keyboard, a mouse, and the like; an output section including a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker and the like; a storage section including a hard disk and the like; and a communication section including a Network interface card such as a LAN (Local Area Network) card, a modem, or the like. The communication section performs communication processing via a network such as the internet. The drive is also connected to the I/O interface as needed. A removable medium such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive as necessary, so that a computer program read out therefrom is mounted into the storage section as necessary.
In particular, according to an embodiment of the present disclosure, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method illustrated in the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network through the communication section 609, and/or installed from the removable medium 611. The computer program performs the above-described functions defined in the method of the present application when executed by a Central Processing Unit (CPU) 601. It should be noted that the computer readable medium mentioned above in the present application may be a computer readable signal medium or a computer readable storage medium or any combination of the two. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present application, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In this application, however, a computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present application may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that a process, 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, article, or apparatus.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can be within the protection scope of the invention.
Claims (10)
1. A mud plugging system for directional drilling of a large-fall mountain is used for mud plugging in a reaming process and is characterized by comprising a reaming assembly, a mud plugging assembly and an auxiliary bearing assembly, wherein the auxiliary bearing assembly is arranged outside the reaming assembly to bear an overhanging section of the reaming assembly; the reaming assembly comprises a reaming device and a drill rod, and the drill rod is arranged at the tail end of the reaming device;
the mud plugging assembly comprises an isolation sleeve and a rotary blowout preventer, wherein the isolation sleeve is sleeved on the drill rod, one end of the isolation sleeve extends into a rock mass soil-entering point, and the other end of the isolation sleeve outwards overhangs; the rotary blowout preventer is arranged at the end part, far away from the rock body soil entry point, of the isolation sleeve, and the rotary blowout preventer is in butt sealing connection with the isolation sleeve through a connecting assembly;
a positioning assembly used for performing center positioning on the drill rod is arranged inside the isolation sleeve, the positioning assembly comprises a plurality of center positioning devices, and the center positioning devices are sequentially arranged along the longitudinal direction of the drill rod; the central positioning device comprises a sleeve structure and a central positioning structure, and the central positioning structure is fixedly connected with the sleeve structure; and a through hole for the drill rod to penetrate through is formed in the central positioning structure.
2. The large-drop mountain directional drilling mud plugging system of claim 1, wherein the central positioning structure comprises a first annular structure and a second annular structure, wherein a plurality of spoke structures are arranged on the periphery side of the first annular structure to be fixedly connected with the inner wall of the second annular structure; the inner diameter of the first annular structure and the inner diameter of the casing structure are both larger than the outer diameter of the drill rod;
the sleeve structure comprises a first section of sleeve and a second section of sleeve, and the first section of sleeve and the second section of sleeve are respectively and fixedly connected to two sides of the first annular structure; the end, far away from first annular structure, of first section sleeve pipe is equipped with first flange portion, the end, far away from first annular structure, of second section sleeve pipe is equipped with second flange portion, first flange portion and/or second flange portion be used for with adjacent central positioner connects.
3. The large-drop mountain directional drilling mud plugging system of claim 2, wherein the outer diameter of the second annular structure is smaller than the inner diameter of the isolation casing;
the outer wall of the second annular structure is provided with an elastic part, and the elastic part is abutted against the isolation sleeve;
the inside of the first section of casing pipe and the second section of casing pipe are both provided with annular elastic parts, and the annular elastic parts are abutted to the drill rod.
4. The large-drop mountain directional drilling mud plugging system of claim 1, wherein the auxiliary bearing assembly is a bearing platform; the distance from the top of the bearing platform to the ground is h1, the radius of the drill rod is R, the distance from the longitudinal axis of the drill rod to the ground is h2, and h2 is h1+ R.
5. The large-drop mountain directional drilling mud plugging system of claim 1, wherein the length of the isolation sleeve embedded in the rock body is L1, the total length of the isolation sleeve is L, the ratio of L1 to L is k, and k is equal to (0.2, 0.25); the connecting assembly is a flange.
6. The large-fall mountain directional drilling mud plugging system of claim 1, wherein the auxiliary bearing assembly comprises an auxiliary sleeve and a support rod, the auxiliary sleeve is sleeved on the drill rod; the top of the supporting rod is provided with a concave arc contact part matched with the outer contour of the auxiliary sleeve, the bottom of the supporting rod is provided with a base, and the base is equidistantly penetrated with a ground pin fixing column; the distance from the longitudinal axis of the auxiliary sleeve to the ground is H1, the distance from the longitudinal axis of the drill rod to the ground is H2, and H1 is H2.
7. The directional drilling mud plugging system for the large-fall mountain according to any one of claims 1 to 6, further comprising a master control center, a pressure detection device and a sewage discharge device, wherein the pressure detection device and the sewage discharge device are in signal connection with the master control center;
the top of the isolation sleeve is provided with a first communication hole; the pressure detection device is arranged in the first communication hole and communicated with the inside of the isolation sleeve to detect pressure information inside the isolation sleeve;
the bottom of the isolation sleeve is provided with a second communicating hole; the sewage discharge device comprises a sewage discharge pipe and a sewage discharge control switch, the sewage discharge pipe is arranged in the second communication hole and communicated with the inside of the isolation sleeve, and the sewage discharge control switch is arranged in the sewage discharge pipe to control the on-off of the sewage discharge pipe and the outside;
in the working process, the pressure detection device detects the pressure value inside the isolation sleeve in real time, and when the pressure value is greater than a preset pressure threshold value, the master control center controls the sewage discharge control switch to open the sewage discharge pipe to be communicated with the outside and discharge sewage; when the pressure value inside the isolation sleeve detected by the pressure detection device in real time is smaller than a preset pressure threshold value, the master control center controls the pollution discharge control switch to close the pollution discharge pipe.
8. The large-drop mountain directional drilling mud plugging method is characterized by being based on the large-drop mountain directional drilling mud plugging system of claim 7 and comprising the following steps of:
step S100, carrying out hole expansion work of a preset distance at the soil entry point along the extension direction of the guide hole according to the outer diameter of the isolation sleeve by using the hole expansion assembly; an isolation sleeve, a positioning assembly, a rotary blowout preventer and an auxiliary bearing assembly are arranged on the outer side of the drill rod, and the inside of the isolation sleeve is sealed with the outside through the rotary blowout preventer;
the hole expanding component expands holes towards the unearthing point;
step S200, a pressure detection device detects pressure information inside the isolation sleeve in real time, and if the pressure information is larger than a preset pressure threshold value, a master control center controls a pollution discharge control switch to open a pollution discharge pipe to be communicated with the outside and discharge pollution; when the pressure value inside the isolation sleeve detected by the pressure detection device in real time is smaller than a preset pressure threshold value, the master control center controls the pollution discharge control switch to close the pollution discharge pipe.
9. An electronic device, comprising: at least one processor; and a memory communicatively coupled to at least one of the processors; wherein the memory stores instructions executable by the processor for execution by the processor to implement the high-throw mountain directional drilling mud plugging method of claim 8.
10. A computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions for execution by the computer to implement the large-throw mountain directional drilling mud plugging method of claim 8.
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| CN116122734B (en) * | 2023-04-17 | 2023-06-20 | 四川省公路规划勘察设计研究院有限公司 | Drilling tool for reaming section of TSP water plugging sealing element and use method thereof |
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