CN115110949B - Forward and reverse circulation remote control device of continuous sampling drilling system - Google Patents
Forward and reverse circulation remote control device of continuous sampling drilling system Download PDFInfo
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- CN115110949B CN115110949B CN202210925080.6A CN202210925080A CN115110949B CN 115110949 B CN115110949 B CN 115110949B CN 202210925080 A CN202210925080 A CN 202210925080A CN 115110949 B CN115110949 B CN 115110949B
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- 238000005553 drilling Methods 0.000 title claims abstract description 115
- 238000005070 sampling Methods 0.000 title claims abstract description 45
- 239000011435 rock Substances 0.000 claims abstract description 77
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 37
- 230000008569 process Effects 0.000 claims abstract description 23
- 239000002893 slag Substances 0.000 claims description 20
- 238000000926 separation method Methods 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 18
- 210000004907 gland Anatomy 0.000 claims description 7
- 239000008398 formation water Substances 0.000 claims description 5
- 239000010425 asbestos Substances 0.000 claims description 4
- 229910052895 riebeckite Inorganic materials 0.000 claims description 4
- 230000006872 improvement Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 241000251131 Sphyrna Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
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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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/02—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/18—Pipes provided with plural fluid passages
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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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
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- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
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- Sampling And Sample Adjustment (AREA)
- Earth Drilling (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a forward and reverse circulation remote control device of a continuous sampling drilling system, which comprises a reverse circulation drilling machine, a drilling tool, an air compressor, a forward and reverse circulation remote switching joint and a forward and reverse circulation remote switching joint, wherein the forward and reverse circulation switching of air is realized, water-containing stratum drainage is realized by using forward circulation and dry rock sample collection is realized by using reverse circulation in the water-containing stratum drilling and sampling process.
Description
Technical Field
The invention is applied for the application date of 2020, 4 month and 10 days, and the application numbers are as follows: 202010276877.9, entitled "drilling system and process for continuous sampling by reverse air circulation for water-bearing formation", is filed as a divisional application of the patent application.
The invention relates to the technical field of drilling, in particular to an air reverse circulation continuous sampling drilling system and a process method for a water-bearing stratum.
Background
The air reverse circulation continuous sampling drilling technology is a drilling technology for continuously and efficiently obtaining high-quality rock debris samples, and the principle of the drilling technology is that compressed air is used as a flushing medium and is sent to the bottom of a hole from an annular gap of a double-wall drill rod, and the compressed air carries the rock debris samples to return to the ground surface from a central channel at a high speed. Due to the special design of the morphological structure of the hole bottom drilling tool, compressed air starts to be distributed after reaching the hole bottom, wherein most of the air carries rock debris crushed by the hole bottom drilling bit instantly to enter a central channel of the upper drilling tool through a through hole of a drilling bit face; a small part of air returns upwards from the gap between the drill rod and the hole wall, so that the water pressure at the bottom of the hole can be balanced, and the dry operation environment of the broken rock at the bottom of the hole can be maintained, therefore, theoretically, the broken rock is drilled by an air reverse circulation continuous sampling drilling process to generate a dry and instant upwards returned rock sample, the sampling rate of the air reverse circulation continuous sampling drilling sample can reach 100 percent, the state of the rock layer at the bottom of the hole can be reflected in real time, all rock pillars (rock fragments) forcibly crushed by compressed air return to the ground surface through the central channel, and the interference of surrounding rocks is avoided.
However, in practical application, the sampling rate of the air reverse circulation continuous sampling drilling sample is greatly influenced by the underground water condition in the actual drilling stratum, and when drilling is carried out above the underground water level: the return rock sample is a dry sample, and the sampling rate can reach more than 90%. Drilling below the water table: when the actual drilling stratum contains a small amount of water, the gas pressure can be balanced with the outer ring water pressure, a circle of mud ring is formed above the drilling tool in the drilling process, the mud ring plays a role in sealing the outer ring gap to a certain extent, the dry operation environment of the hole bottom is further kept, and the rock sample sampling rate is improved. However, when the underground water level of the ground layer to be actually drilled is high, the pore water pressure of the ground layer at the bottom of the well exceeds the outer annular air pressure between the well wall and the drill rod, underground water flows into the bottom of the well in the drilling process and returns from the hollow channel of the drill rod along with a rock sample, the rock sample is sludge-shaped, great difficulty is brought to rock sample collection, sample pollution can be caused, part of samples run off along with underground water, the rock sample collection rate is usually lower than that of dry sample drilling, generally only 40% -70%, and the requirement of geological survey specifications on the ore sample collection rate cannot be met.
At present, no solution is provided for the current situation, a cloth bag capable of filtering water is generally adopted as a sampling bag to be connected to the lower outlet of a cyclone separation sampler, and the returned silt rock sample is filtered and dried in the cloth bag to become a dry sample and then is subjected to post-treatment. The treatment can cause a great amount of loss of the rock and ore sample along with groundwater, the sampling rate is too low, the time consumption for treating the wet rock sample is long, and geologists can hardly accept the rock and ore sample. Therefore, the air reverse circulation continuous sampling drilling process method is greatly limited when the air reverse circulation continuous sampling drilling process method is used in the stratum containing underground water.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to solve the problems of low sampling rate and difficult sample treatment in the water-bearing stratum by utilizing air reverse circulation continuous sampling drilling sampling, and provides an air reverse circulation continuous sampling drilling system and a process method for the water-bearing stratum.
The invention provides an air reverse circulation continuous sampling drilling system for a water-bearing stratum, which is characterized in that: the device comprises a reverse circulation drilling machine, a drilling tool, an air compressor, a forward and reverse circulation remote switching joint, a forward circulation deslagging and drainage device, a forward circulation discharged rock debris sample separating and collecting device and a reverse circulation discharged rock debris sample separating and collecting device;
the drilling tool comprises a drilling machine power head, a double-wall drill rod and a through type down-the-hole hammer, wherein the drilling machine power head, the double-wall drill rod and the through type down-the-hole hammer are sequentially arranged from top to bottom;
the positive and negative circulation remote control switching joint comprises a joint outer pipe, a joint inner pipe and a remote control valve body, wherein the joint inner pipe is arranged in the joint outer pipe, the center lines of the joint inner pipe and the joint outer pipe are positioned on the same straight line, and the remote control valve body is used for remotely controlling the opening and closing of a joint inner pipe channel;
the positive circulation deslagging drainage device comprises an orifice sleeve and an orifice annular sealing deslagging drainage device, wherein the orifice sleeve is a cylindrical hollow pipe body with an annular convex edge, the orifice annular sealing deslagging drainage device comprises an upper structure and a lower structure, the upper structure comprises a conical rubber core and an upper pipe fitting, the conical rubber core is arranged in the upper pipe fitting and is mounted on a flange through a bolt, the flange is connected with the upper pipe fitting, the lower structure is a three-way pipe body, the upper pipe body of the three-way pipe body is connected with the upper structure, and the lower pipe body of the three-way pipe body is connected with the annular convex edge of the orifice sleeve through the flange;
the separation and collection device for the positive-circulation discharged rock debris sample comprises a positive-circulation slag discharge pipe and a cyclone separator;
the separation and collection device for the reverse circulation discharged rock debris sample comprises a reverse circulation slag discharge pipe and a cyclone separator;
the reverse circulation drilling machine is connected with the drilling tool, the air inlet end of the drilling machine power head is connected with the air compressor through a high-pressure rubber pipe, the rock debris sample outlet end of the drilling machine power head is connected with the reverse circulation slag discharge pipe, the reverse circulation slag discharge pipe is connected with the cyclone separator, the air outlet end of the drilling machine power head is in threaded connection with the outer joint pipe, the other end of the outer joint pipe is in threaded connection with the outer rod of the double-wall drilling rod, and the inner joint pipe is in plug-in connection with the inner rod of the double-wall drilling rod at the same end where the outer joint pipe is connected with the double-wall drilling rod; an inner rod of the double-wall drill rod, a joint inner pipe of the forward and reverse circulation remote switching joint, a rock debris sample outlet end of a drilling machine power head, a reverse circulation slag discharge pipe and a cyclone separator are sequentially communicated to form a rock debris sample upward return collecting channel;
the positive circulation deslagging and drainage device is sleeved at a drilling hole opening of the outer wall of the double-wall drill rod, the hole opening sleeve is inserted into the drilling hole opening, the lateral flow guide pipe body of the three-way pipe body is connected with the positive circulation deslagging pipe, the positive circulation deslagging pipe is connected with the cyclone separator, a channel formed by the hole wall of the drilling hole and the gap between the outer walls of the double-wall drill rod, and a channel formed by the positive circulation deslagging and drainage device and the gap between the outer walls of the double-wall drill rod, the positive circulation deslagging pipe and the cyclone separator are sequentially communicated to form a stratum water discharge and collection channel.
As a further improvement of the technical solution, the remote control valve body includes a ball valve, a valve body, a valve rod, a gland nut, and an actuator, the ball valve and the valve body are located in the joint inner tube, the ball valve is connected to the valve rod, the valve rod is connected to the actuator, and the nut gland is in threaded connection with the joint outer tube.
As a further improvement of the technical scheme, the actuator is an electric actuator.
As a further improvement of the technical scheme, the air outlet end of the power head of the drilling machine is connected with the connecting end connected with the outer pipe, the outer pipe is an internal thread, an annular platform is arranged at the position of the tail end of the internal thread of the outer pipe, the tail end of the internal thread corresponds to the position, a plurality of bulges are uniformly distributed on the same circumference of the outer wall of the inner pipe of the joint, and the bulges are clamped on the surface of the platform.
As a further improvement of the technical scheme, the protrusions are rectangular, are three in number and are uniformly distributed on the same circumference of the outer wall of the inner pipe of the joint.
As a further improvement of the technical scheme, the inner diameter of the orifice sleeve is not less than the diameter of the orifice of the drill hole.
As a further improvement of the technical scheme, the upper structure and the lower structure are connected through a quick-connection clamp.
As a further improvement of the technical scheme, the connection surfaces of the flange and the upper pipe fitting, the upper structure and the upper pipe body of the three-way pipe body, and the connection surfaces of the lower pipe fitting of the three-way pipe body and the annular convex edge of the orifice sleeve respectively play a role of sealing by using asbestos pads.
The invention also provides an air reverse circulation continuous sampling drilling process method for the water-bearing stratum, which is characterized by comprising the following steps of: the process method is characterized in that a reverse circulation drilling machine, a drilling tool, an air compressor, a forward and reverse circulation remote switching joint, a forward circulation slag discharge and drainage device, a forward circulation discharged rock debris sample separation and collection device and a reverse circulation discharged rock debris sample separation and collection device are assembled and connected.
When air reverse circulation continuous sampling drilling is carried out, the forward and reverse circulation remote switching joint is opened, a ball valve in the forward and reverse circulation remote control switching joint is in a normally open state, the air compressor starts to generate compressed air, the compressed air is output and enters an annular channel of the double-wall drill rod through the drill power head and the forward and reverse circulation remote control switching joint, the compressed air drives the through type down-the-hole hammer to act, a uniform negative pressure zone is formed at the bottom of a drill hole, a rock sample is carried to return upwards through a entrainment effect, and finally the rock sample return collecting channel is formed by sequentially communicating an inner rod of the double-wall drill rod, a joint inner tube of the forward and reverse circulation remote switching joint, a rock sample outlet end of the drill power head, a reverse circulation slag discharge tube and a cyclone separator, so that the separation and collection of the rock sample are realized;
when the separation and collection device for the reverse circulation discharged rock debris sample returns to the rock sample and returns to the wet rock sample to be a sludge-shaped solid-liquid mixture, the forward and reverse circulation remote control switching joint is closed through remote operation, the inner rod channel of the double-wall drill rod is closed, the rock debris sample upward return collection channel is closed, the reverse circulation drilling machine is operated to enable the through type down-the-hole hammer and the double-wall drill rod to be in a suspended state from bottom to bottom, the air compressor is started to generate compressed air, the compressed air is output, the drilling machine power head passes through the inner joint tube of the forward and reverse circulation remote control switching joint and the annular channel of the outer joint tube and then enters the annular channel of the double-wall drill rod, the double-wall drill rod which is lowered to the bottom discharges high-pressure air to forcibly discharge underground water accumulated at the bottom of the hole, the underground water is discharged from the bottom through the hole wall and the outer annular space formed between the outer wall of the double-wall drill rod, the forward circulation slag discharge pipe and the cyclone separator discharges the underground water, when the separation and collection device for the forward and reverse circulation discharged rock debris sample is discharged, the forward and reverse circulation remote control switching joint is opened, and the spherical reverse circulation drilling and the drying sample is continuously taken.
The invention has the beneficial effects that:
compared with the prior art, the air reverse circulation continuous sampling drilling system and the process method for the water-bearing stratum provided by the invention have the advantages that the forward and reverse circulation remote switching connector is utilized to realize the forward and reverse circulation switching of air, the forward circulation is utilized to realize the water-bearing stratum drainage in the drilling and sampling process of the water-bearing stratum, the reverse circulation is utilized to realize the collection of the dry rock sample, the defects of the air reverse circulation continuous sampling drilling process method in the drilling process of the water-bearing stratum can be effectively overcome, the adoption rate of the air reverse circulation continuous sampling drilling process method for drilling the rock sample is greatly improved on the premise of ensuring the dryness of the returned rock sample, and the application range of the air reverse circulation continuous sampling drilling process method is expanded.
Drawings
Fig. 1 is a schematic view of the structure of a reverse circulation drilling system of the present invention.
FIG. 2 is a schematic diagram of a forward/reverse circulation remote control switch structure.
FIG. 3 is a schematic structural view of an orifice annular sealing deslagging drainage device.
FIG. 4 is a schematic view of a quick connect clamp connection.
Wherein: the device comprises a reverse circulation drilling machine 1, an air compressor 2, a 3-orifice annular sealing deslagging and drainage device, a 4-forward and reverse circulation remote control switching joint, a 5-cyclone separator, a 6-cyclone separator, a 7-forward circulation deslagging pipe, an 8-reverse circulation deslagging pipe, a 9-through down-the-hole hammer, a 10-double-wall drill rod, a 11-orifice sleeve, a 12-drilling-machine power head, a 3.1 three-way pipe body, a 3.2 quick-connection clamp, a 3.3 upper pipe body, a 3.4 conical rubber core, a 3.5 three-way pipe body lateral flow guide pipe body, a 3.6, a 3.7, a 3.8 asbestos gasket, a 3.9, a 3.10, a 3.11 flange connection, a 4.1-joint outer pipe, a 4.2-joint inner pipe, a 4.3 spherical valve, a 4.4.4 valve body, a 4.5 valve rod, a 4.6 gland nut, a 4.7 electric actuator, a 4.8 bulge and a 4.9 annular platform.
Description of the preferred embodiment
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1 to 4, the invention provides an air reverse circulation continuous sampling drilling system for a water-bearing stratum, which comprises a reverse circulation drilling machine 1, a drilling tool, an air compressor 2, a forward and reverse circulation remote switching joint 4, a forward circulation deslagging and drainage device, a forward circulation discharged rock debris sample separating and collecting device and a reverse circulation discharged rock debris sample separating and collecting device.
The drilling tool comprises a drilling machine power head 12, a double-wall drill rod 10 and a through type down-the-hole hammer 9 which are sequentially arranged from top to bottom, wherein the drilling machine power head 12 comprises an air inlet end, an air outlet end and a rock debris sample outlet end;
the forward and reverse circulation remote control switching connector 4 comprises a connector outer tube 4.1, a connector inner tube 4.2 and a remote control valve body, wherein the connector inner tube 4.2 is arranged in the connector outer tube 4.1, the connector inner tube 4.2 and the connector outer tube 4.1 are positioned on the same central line, and the remote control valve body is used for remotely controlling the opening and closing of a channel of the connector inner tube 4.2;
the positive circulation deslagging and drainage device comprises an orifice sleeve 9 and an orifice annular sealing deslagging and drainage device 3, wherein the orifice sleeve 9 is a cylindrical hollow pipe body with an annular convex edge, the orifice annular sealing deslagging and drainage device 3 comprises an upper structure and a lower structure, the upper structure comprises a conical rubber core 3.4 and an upper pipe fitting 3.3, the conical rubber core 3.4 is arranged in the upper pipe fitting 3.3 and is installed on a flange 3.10 through a bolt, the flange 3.10 is connected with the upper pipe fitting 3.3 through a bolt, the lower structure is a three-way pipe body 3.3, the upper structure 3.3 is quickly connected with the upper pipe body of the three-way pipe body through a quick-connection clamp, and the lower pipe body of the three-way pipe body 3.3 is connected with the annular convex edge of the orifice sleeve 9 through a flange; the conical rubber core plays a role in sealing, so that formation water enters the separation and collection device for positive circulation discharge of rock debris samples through the positive circulation slag discharge and drainage device.
The separation and collection device for the positive-circulation discharged rock debris sample comprises a positive-circulation slag discharge pipe 7 and a cyclone separator 6;
the separation and collection device for the reverse circulation discharged rock debris sample comprises a reverse circulation slag discharge pipe 8 and a cyclone separator 5;
the reverse circulation drilling machine 1 is connected with a drilling tool, the air inlet end of a drilling machine power head 12 is connected with an air compressor 2 through a high-pressure rubber pipe, the rock sample outlet end of the drilling machine power head 12 is connected with a reverse circulation slag discharge pipe 7, the reverse circulation slag discharge pipe 7 is connected with a cyclone separator 6, the air outlet end of the drilling machine power head 12 is in threaded connection with an outer joint pipe 4.1, the other end of the outer joint pipe 4.1 is in threaded connection with an outer rod of a double-wall drill rod 10, the inner joint pipe 4.2 is in inserted connection with an inner rod of the double-wall drill rod 10 at the same end of the outer joint pipe 4.1 connected with the double-wall drill rod 10, a rubber ring is arranged at the joint of the inner joint pipe 4.2 to play a sealing role, and an inner rod of the double-wall drill rod 10, a joint inner pipe 4.2 of a forward and reverse circulation remote switching joint, the rock sample outlet end of the drilling machine, a reverse circulation slag discharge pipe 8 and a cyclone separator 5 are sequentially communicated to form a rock sample upward return collection channel;
the positive circulation deslagging and drainage device is sleeved at a drilling hole on the outer wall of the double-wall drill rod 10, the hole sleeve 9 is inserted into the drilling hole, the lateral diversion pipe body 3.5 of the three-way pipe body is connected with the positive circulation deslagging pipe 7, the positive circulation deslagging pipe 7 is connected with the cyclone separator 5, and a channel formed by the hole wall of the drilling hole and the outer wall clearance of the double-wall drill rod 10, a channel formed by the positive circulation deslagging and drainage device and the outer wall clearance of the double-wall drill rod 10, the positive circulation deslagging pipe 7 and the cyclone separator 6 are sequentially communicated to form a formation water drainage collection channel.
As shown in fig. 2, the remote control valve body includes: the ball valve 4.3, the valve body 4.4, the valve rod 4.5, the gland nut 4.6, the electric actuator 4.7, the ball valve 4.3 and the valve body 4.4 are arranged in the joint inner tube 4.2, and the valve which is a channel of the inner tube is used for controlling the opening and closing of the channel of the inner tube; the ball valve 4.3 is connected with a valve rod 4.5, the valve rod 4.5 is connected with an electric actuator 4.7, a sealing cavity is formed by connecting a nut gland 4.6 and a connector outer pipe 4.1 in a threaded manner, the electric actuator 4.7 drives the valve rod 4.5 and the ball valve 4.3 to realize remote opening and closing of a connector inner pipe 4.2 channel, the ball valve 4.3 is closed, an inner pipe rock sample return channel of the double-wall drill rod 10 is closed, a stratum water discharge channel is formed by a gap between a hole wall and the outer wall of the double-wall drill rod 10, and stratum water is subjected to the action of high-pressure air at the ground bottom, and the monitoring of the stratum water discharge state is realized by the stratum water discharge channel, the positive circulation deslagging drainage device 3 and the separation and collection device of the positive circulation discharged rock debris sample.
The electric actuator 4.7 may also be a pneumatic or hydraulic actuator.
As shown in figure 1, in order to ensure the collection efficiency of the formation water, the inner diameter of the orifice casing 9 is larger than the diameter of the drill orifice, so as to ensure that the upward return formation water can completely enter the orifice ring sealing deslagging drainage device 3.
As shown in fig. 3, an upper pipe fitting 3.3 of the orifice annular sealing deslagging drainage device 3 is connected with a three-way pipe body 3.1 through a quick connecting clamp 3.2; the connection surface of the conical rubber core 3.4 and the flange 3.10, the connection surface of the upper structure (the upper pipe fitting 3.3) and the lower structure (the upper pipe fitting of the three-way pipe body 3.1), and the connection surface of the lower pipe fitting of the three-way pipe body 3.1 and the annular convex edge of the orifice sleeve 9 respectively play a role of sealing by using asbestos pads.
As shown in figure 4, the upper structure and the lower structure of the orifice ring sealing deslagging drainage device are quickly connected through the quick connecting clamp, so that the rubber core is convenient to replace.
The invention provides an air reverse circulation continuous sampling drilling process method for a water-bearing stratum, which can be realized by the following operation flows:
when the air reverse circulation continuous sampling drilling is carried out, a spherical valve 4.3 in a forward and reverse circulation remote control switching joint 4 is in a normally open state, an air compressor 2 generates compressed air, the compressed air is output and enters an annular channel of a double-wall drill rod 10 through a drill power head 12 and the forward and reverse circulation remote control switching joint 4, the compressed air drives a through type down-the-hole hammer 9 to act, a uniform negative pressure zone is formed at the bottom of a drill hole, a rock sample is carried to return upwards through the entrainment effect, and finally the rock sample returns upwards through a rock sample return channel formed by sequentially communicating a central channel of the double-wall drill rod 10, a joint inner tube 4.2 of the forward and reverse circulation remote control switching joint 4, the drill power head 12 and a reverse circulation slag discharge tube 8 and enters a cyclone separator 5, so that the separation and collection of the rock sample are realized.
When the separation and collection device for discharging the rock debris sample by reverse circulation returns to the rock specimen and returns to the wet rock specimen to form a sludge-shaped solid-liquid mixture, the forward and reverse circulation remote control switching joint 4 is remotely operated, the ball valve 4.3 is closed, the inner rod channel of the double-wall drill rod 10 is closed, the upward and reverse collection channel of the rock debris sample is closed, the reverse circulation can be converted into a forward circulation drilling mode at the moment, the through type down-the-hole hammer 9 and the double-wall drill rod 10 are lowered to the hole bottom through the reverse circulation drilling machine 1, the hammer heads are in a suspended state, the air compressor 2 generates compressed air, the compressed air is output, the underground water stored at the hole bottom is forcibly discharged through the annular channel of the drill power head 12, the joint inner pipe 4.2 of the forward and reverse circulation remote control switching joint outer pipe 4.1 of the drill rod 10 and the double-wall drill rod 10 which is lowered to the hole bottom, underground water passes through an outer ring space formed between the hole bottom and the outer wall of the double-wall drill rod 10 through a hole wall and is discharged 6 through a forward circulation deslagging and drainage device, a forward circulation deslagging and drainage pipe 7 and a cyclone separator, when no underground water is discharged at a lower discharge port of the cyclone separator 6 in a separation and collection device for rock debris samples discharged in a forward circulation mode, the forward circulation and the reverse circulation remote control switching joint 4 is remotely operated, a ball valve 4.3 is opened, the forward circulation mode is converted into a reverse circulation sampling drilling mode at the moment (because high-pressure gas completely enters the outer ring space of the double-wall drill rod 10 and the hole wall during drilling in the forward circulation mode, when a ball valve 4.3 in the forward circulation and reverse circulation remote control switching joint 4 is in a closed state, the air pressure of the outer ring space is increased, and because the water head pressure of pore water in a water-bearing stratum is reduced after water drainage, the air pressure of the hole bottom and the outer ring water pressure are restored to be balanced), the continuous drilling of the hole bottom can still maintain a dry state, and the continuous reverse circulation sampling drilling can improve the sampling rate of rock ore samples and obtain dry samples.
In the process of drilling and sampling the water-bearing stratum, the process method realizes drainage of the water-bearing stratum by using forward circulation and realizes collection of the dry rock sample by using reverse circulation sampling drilling, and greatly improves the sampling rate of the drilled rock sample on the premise of ensuring the dryness of the returned rock sample.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should be considered within the scope of the invention.
Claims (1)
1. The utility model provides a positive and negative circulation remote control of continuous sampling drilling system which characterized in that: the device comprises a reverse circulation drilling machine, a drilling tool, an air compressor and a forward and reverse circulation remote control switching joint;
the drilling tool comprises a drilling tool power head, a double-wall drill rod and a through type down-the-hole hammer, wherein the drilling tool power head, the double-wall drill rod and the through type down-the-hole hammer are sequentially arranged from top to bottom, and the drilling tool power head comprises an air inlet end, an air outlet end and a rock debris sample outlet end;
the positive and negative circulation remote control switching joint comprises a joint outer pipe, a joint inner pipe and a remote control valve body, wherein the joint inner pipe is arranged in the joint outer pipe, the center lines of the joint inner pipe and the joint outer pipe are positioned on the same straight line, and the remote control valve body is used for remotely controlling the opening and closing of a joint inner pipe channel;
the remote control valve body comprises a ball valve, a valve body, a valve rod, a gland nut and an actuator, the ball valve and the valve body are arranged in the joint inner pipe, the valve rod is connected to the ball valve, the valve rod is connected to the actuator, and the gland nut is in threaded connection with the joint outer pipe;
the actuator is a pneumatic or hydraulic actuator;
the forward and reverse circulation remote control device realizes the switching of forward and reverse circulation of air, realizes the drainage of the water-bearing stratum by utilizing the forward circulation and realizes the collection of a dry rock sample by utilizing the reverse circulation in the drilling and sampling process of the water-bearing stratum;
the forward and reverse circulation remote control switching joint, the forward circulation deslagging and drainage device, the forward circulation discharged rock debris sample separation and collection device and the reverse circulation discharged rock debris sample separation and collection device form an air reverse circulation continuous sampling drilling system; on the premise of ensuring the dryness of the returned rock ore sample, the sampling rate of the air reverse circulation continuous sampling drilling process method for drilling the rock ore sample is greatly improved, and the application range of the air reverse circulation continuous sampling drilling process method is expanded;
the positive circulation deslagging drainage device comprises an orifice sleeve and an orifice annular sealing deslagging drainage device, wherein the orifice sleeve is a cylindrical hollow pipe body with an annular convex edge, the orifice annular sealing deslagging drainage device comprises an upper structure and a lower structure, the upper structure comprises a conical rubber core and an upper pipe fitting, the conical rubber core is arranged in the upper pipe fitting and is mounted on a flange through a bolt, the flange is connected with the upper pipe fitting, the lower structure is a three-way pipe body, the upper pipe body of the three-way pipe body is connected with the upper structure, and the lower pipe body of the three-way pipe body is connected with the annular convex edge of the orifice sleeve through the flange;
the separation and collection device for the positive circulation discharged rock debris sample comprises a positive circulation slag discharge pipe and a cyclone separator;
the separation and collection device for the reverse circulation discharged rock debris sample comprises a reverse circulation slag discharge pipe and a cyclone separator;
the reverse circulation drilling machine is connected with the drilling tool, the air inlet end of the drilling machine power head is connected with the air compressor through a high-pressure rubber pipe, the rock debris sample outlet end of the drilling machine power head is connected with the reverse circulation slag discharge pipe, the reverse circulation slag discharge pipe is connected with the cyclone separator, the air outlet end of the drilling machine power head is in threaded connection with the outer joint pipe, the other end of the outer joint pipe is in threaded connection with the outer rod of the double-wall drilling rod, and the inner joint pipe is in plug-in connection with the inner rod of the double-wall drilling rod at the same end where the outer joint pipe is connected with the double-wall drilling rod; an inner rod of the double-wall drill rod, a connector inner tube of the forward and reverse circulation remote control switching connector, a rock debris sample outlet end of a drilling machine power head, a reverse circulation slag discharge pipe and a cyclone separator are sequentially communicated to form a rock debris sample upward return collecting channel;
the positive circulation deslagging and drainage device is sleeved at a drilling hole opening on the outer wall of the double-wall drill rod, the hole opening sleeve is inserted into the drilling hole opening, a lateral flow guide pipe body of the three-way pipe body is connected with the positive circulation deslagging pipe, the positive circulation deslagging pipe is connected with the cyclone separator, and a channel formed by the hole wall of a drilling hole and a gap between the outer walls of the double-wall drill rod, a channel formed by the positive circulation deslagging and drainage device and the gap between the outer walls of the double-wall drill rod, the positive circulation deslagging pipe and the cyclone separator are sequentially communicated to form a formation water discharge and collection channel;
the upper structure and the lower structure are connected through a quick connection clamp;
the flange and the upper pipe fitting, the upper structure and the upper pipe body connecting surface of the three-way pipe body, and the lower pipe fitting of the three-way pipe body and the annular convex edge connecting surface of the orifice sleeve respectively play a role in sealing by asbestos pads.
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| CN202010276877.9A CN111287743B (en) | 2020-04-10 | 2020-04-10 | Air reverse circulation continuous sampling drilling system and process method for water-bearing stratum |
| CN202210925080.6A CN115110949B (en) | 2020-04-10 | 2020-04-10 | Forward and reverse circulation remote control device of continuous sampling drilling system |
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| CN113266269B (en) * | 2021-05-11 | 2022-08-05 | 中国石油天然气集团有限公司 | Drill rod power head device, circulating device and drilling machine |
| CN114000847B (en) * | 2021-11-11 | 2023-07-18 | 河南豫中地质勘查工程有限公司 | Full-automatic orifice sealing and related operation system for gas drilling |
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- 2020-04-10 CN CN202210925080.6A patent/CN115110949B/en active Active
Also Published As
| Publication number | Publication date |
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| CN115110949A (en) | 2022-09-27 |
| CN115059462B (en) | 2023-02-14 |
| CN115059462A (en) | 2022-09-16 |
| CN111287743B (en) | 2022-08-23 |
| CN111287743A (en) | 2020-06-16 |
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