CN112196466B - Water pressure test device for geological exploration of horizontal directional drilling engineering by utilizing water pressure locking - Google Patents
Water pressure test device for geological exploration of horizontal directional drilling engineering by utilizing water pressure locking Download PDFInfo
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- CN112196466B CN112196466B CN202010939078.5A CN202010939078A CN112196466B CN 112196466 B CN112196466 B CN 112196466B CN 202010939078 A CN202010939078 A CN 202010939078A CN 112196466 B CN112196466 B CN 112196466B
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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
- E21B7/046—Directional drilling horizontal 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
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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
Abstract
The invention provides a water pressure test device for geological exploration of horizontal directional drilling engineering, which is locked by water pressure, and comprises a telescopic locking mechanism, a front drill rod and a rear drill rod, wherein the telescopic locking mechanism comprises an outer pipe, an inner pipe, a first annular moving block, an annular turntable, a plurality of fixing strips and a second annular moving block; water injection in the drilling rod ahead utilizes the water pressure in the inner tube to promote the second annular movable block to the rotation of control annular carousel makes the inclined plane tooth of fixed strip switch between meshing mutually with the first inclined plane breach or the second inclined plane breach of annular carousel, and then controls the intercommunication in third water passage hole and first limbers hole, second limbers hole, realizes utilizing downthehole power to realize the pressurization and the deblocking of embolism. The technical scheme provided by the invention has the beneficial effects that: the water-pressure test in the overlong horizontal drilling hole can be realized, the safety and smooth proceeding of the long-distance exploration process can be ensured, the engineering exploration requirement is met, and the development of the horizontal directional drilling engineering exploration technology can be promoted.
Description
Technical Field
The invention relates to the technical field of horizontal directional drilling, in particular to a water pressure test device for geological exploration of a horizontal directional drilling engineering, which is locked by utilizing water pressure.
Background
At present, with the increase of long-distance large-buried-depth tunnel engineering, the traditional vertical drilling exploration method meets great challenges. If the traditional vertical drilling exploration method is still used, many problems can be faced, such as the obtained stratum information can not meet the requirements of engineering design, the effective drilling length is too low, the drilling holes are too deep, the drilling number is too large, the manufacturing cost is too high, and the limitation by the terrain is large.
The horizontal directional drilling technology adopts equipment with guiding and direction controlling functions to lay pipelines for water supply, electric power, telecommunication, natural gas, coal gas, petroleum and the like under the condition of not excavating the ground surface, and the construction method is mature and has the advantages of high precision, low manufacturing cost and the like. The horizontal directional drilling machine is used for drilling and surveying along the extending direction of the tunnel, the method has the advantages of good terrain adaptability, easy acquisition of geological parameters, more information, long effective drilling length and the like, can solve the problems existing in the traditional method, is a good alternative technology, and has wide application prospect.
The water pressing test is an important component in engineering geological exploration work and aims to obtain hydrogeological information of rock stratum. However, the current water pressure test device cannot be completely adapted to the environment in the overlong horizontal directional drilling hole.
At present, the hydraulic plug plugging method mainly comprises the following two methods, namely, a water supply pipeline is independently arranged to fill water into the plug to expand the plug, and a drilling machine is utilized to move a drill rod up and down to control the opening and closing of a plug water gap through the up and down movement of the drill rod so as to realize the respective closing of the plug and the water pressing process. In the ultralong horizontal directional drilling, when the drill rod is pushed, the drill rod is rotated in order to overcome the friction force of the hole wall. The water injection pipe is arranged outside the drill rod, and is easy to wind and break, and the rough hole wall can damage the water injection pipe. The length of the horizontal directional drilling hole can reach several kilometers, at the moment, the flexibility of the drill rod is large, the friction force between the drill rod and the hole wall is large, the generated elastic deformation is also large, the drill rod in the device can not accurately advance and retreat, the water gap opening and closing can not be successfully controlled, and the test failure is caused.
Disclosure of Invention
In view of the above, to solve the above problems, embodiments of the present invention provide a water pressure test apparatus for geological exploration in horizontal directional drilling engineering using water pressure locking.
The embodiment of the invention provides a water pressure test device for geological exploration of horizontal directional drilling engineering, which is locked by water pressure, and comprises a telescopic locking mechanism, a front drill rod and a rear drill rod, wherein the telescopic locking mechanism comprises:
the outer pipe extends in the front-back direction, the front end of the outer pipe is connected with the front drill rod, an annular groove with an outward notch is formed in the outer side wall of the outer pipe, the annular groove is located on the periphery of the outer pipe, an annular plug is arranged at the top of the annular groove to form an inner cavity, and a first water through hole penetrates through the bottom wall of the annular groove;
the front end of the inner pipe is hermetically connected with the rear end of the outer pipe and is positioned in the outer pipe, the rear end of the inner pipe is connected with the rear drill rod, a high-pressure closed valve is arranged on the rear drill rod, the inner side wall of the front end of the inner pipe extends forwards to form an annular protruding portion, an annular limiting space is formed between the annular protruding portion and the outer pipe, a second water through hole penetrates through the position, opposite to the first water through hole, of the annular protruding portion, and the rear end of the horizontal directional drilling engineering geological exploration water pressure test device locked by water pressure is in a closed arrangement;
the first annular moving block is positioned in the annular limiting space and positioned at the periphery of the annular protruding part, the rear end of the first annular moving block is connected with the front end of the inner pipe through a spring, a third water through hole penetrates through the side wall of the first annular moving block, and when the spring is in an initial state, the third water through hole is communicated with the first water through hole and the second water through hole;
the annular turntable is positioned on the periphery of the annular protruding part and in the annular limiting space, the annular turntable is positioned on the front side of the first annular moving block, the front end of the annular turntable is provided with a plurality of first inclined plane notches and a plurality of second inclined plane notches which are alternately arranged and sequentially connected, the first inclined plane notches and the second inclined plane notches are provided with first inclined planes in the same inclination direction, and the depth of the first inclined plane notches is greater than that of the second inclined plane notches;
the fixing strips extend in the front-back direction, are arranged at intervals along the circumferential direction of the outer pipe and are fixed on the inner side wall of the outer pipe, and inclined plane teeth meshed with the first inclined plane notch and the second inclined plane notch are arranged at the rear ends of the fixing strips; and the number of the first and second groups,
the second annular moving block is arranged in the annular limiting space in a forward and backward moving mode, is positioned on the periphery of the annular protruding portion and is positioned on the front side of the annular turntable, a plurality of strip-shaped grooves matched with the fixing strips are formed in the outer side wall of the second annular moving block, the second annular moving block is arranged between the outer pipe and the inner pipe side wall in a sealing mode, a protrusion protruding backwards is arranged at the rear end of the second annular moving block, the protrusion abuts against one of the first inclined surfaces, and the protrusion and the first inclined surfaces are arranged at intervals;
when the bevel teeth are meshed with the first bevel notch of the annular turntable, the third through water hole is opposite to the first through water hole and the second through water hole so as to communicate the inner part of the inner pipe with the inner cavity; when the bevel teeth are meshed with a second bevel notch of the annular turntable, the third through water hole is staggered with the first through water hole and the second through water hole, so that the inner cavity is sealed;
the test method based on the water pressure locking horizontal directional drilling engineering geological exploration water pressure test device comprises the following steps:
s1, pushing the rear end of the device into a designated position in a horizontal drill hole, injecting water into the front end of the forward drill rod, and injecting the water into an inner cavity among the inner pipe, the outer pipe and the plug;
s2, increasing the water pressure in the inner pipe to a preset water pressure, pushing the second annular moving block to move backwards, driving the annular turntable and the first annular moving block to move backwards, compressing the spring, and rotating the annular turntable along the direction of the bevel teeth when the annular turntable moves to the unlocking position with the fixed strip;
s3, reducing the water pressure in the inner pipe, and pushing the annular turntable to continue rotating along the direction of the bevel teeth by the spring, so that the second bevel notch of the first annular moving block is meshed with the bevel teeth of the fixed bar, and the third water through hole is staggered with the first water through hole and the second water through hole, so that the inner cavity is sealed;
s4, reducing the water pressure in the inner pipe until the pressure required by the pressurized water test, and carrying out the pressurized water test according to the specification;
s5 is operated according to step S2;
s6, the water pressure in the inner pipe is reduced, the spring pushes the annular turntable to continue rotating along the direction of the bevel teeth, so that the first bevel notch of the first annular moving block is meshed with the bevel teeth of the fixing bar, the third water through hole is communicated with the first water through hole and the second water through hole, and the high-pressure water in the inner cavity between the outer pipe and the plug flows out;
s7, the drill rod is pulled back to carry out the next test, and the equipment is taken out to finish the test.
Furthermore, a pressure release valve is connected to the rear end of the horizontal directional drilling engineering geological exploration water pressure test device locked by water pressure.
Further, the front end of the outer pipe is connected with the front drill rod through an adapter.
Further, the outer tube and the fixing strip are integrally formed.
Furthermore, the first inclined plane gradient of the first inclined plane notch is the same as that of the second inclined plane notch, and the rear side face of the protrusion is arranged in an inclined plane to form a second inclined plane matched with the first inclined plane.
Furthermore, a plurality of protrusions are arranged at the rear end of the second annular moving block, and the second inclined planes correspond to the inclined planes of the first inclined plane notch or the inclined planes of the second inclined plane notch one by one.
Furthermore, the number of the telescopic locking mechanisms is two, the water pressure for pushing the second annular moving block to move backwards corresponding to the two telescopic locking mechanisms is different, and the two telescopic locking mechanisms are connected through the rear drill rod in the front-rear direction.
Furthermore, the two telescopic locking mechanisms are arranged, the water pressures for pushing the second annular moving block to move backwards, which correspond to the two telescopic locking mechanisms, are different, and the two telescopic locking mechanisms are connected through the rear drill rod in the front-rear direction;
when the water level of the inclined section of the horizontal drilling hole is not full, the water pressure for pushing the first annular moving block to move backwards corresponding to the telescopic locking mechanism with relatively high terrain is P1, and the water pressure for pushing the first annular moving block to move backwards corresponding to the telescopic locking mechanism with relatively low terrain is P2;
the test method comprises the following steps:
implementing steps S1 to S3, wherein the preset water pressure is P2, and the inner cavities of the two telescopic locking mechanisms are sealed;
implementing steps S5 and S6, wherein the preset water pressure is P1, and the high-pressure water in the inner cavity of the telescopic locking mechanism with relatively high terrain flows out;
reducing the water pressure in the inner pipe, opening the high-pressure closed valve, and injecting water into the drill hole, so that the liquid level in the drill hole is higher than the height of the annular plug with relatively high topography;
implementing steps S1 to S3, wherein the preset water pressure is P1, and the inner cavity of the telescopic locking mechanism with relatively high terrain is sealed;
and executing steps S4 to S6, wherein the preset water pressure is P2, and the high-pressure water in the inner cavity of the telescopic locking mechanism with relatively high terrain flows out.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: through being provided with flexible locking mechanism, can adjust the segment length according to the circumstances, water injection in the drilling rod forward, utilize the water pressure in the inner tube to promote second annular movable block, thereby control the rotation of annular carousel, make the inclined plane tooth of fixed strip switch between the first inclined plane breach or the second inclined plane breach looks meshing with annular carousel, and then control third water passage hole and first limbers, the intercommunication in second limbers, realize utilizing downthehole power to realize the pressurization and the deblocking of embolism, need not establish one set of high pressure water supply pipeline and water pump in addition, also need not the accurate drilling rod that removes, can solve and utilize the water pipe to supply water for the embolism inner chamber and take place the winding and the scheduling problem that splits. The device can be used for ordinary vertical drilling, can also realize acquisition of hydrogeological parameters in the overlong horizontal directional drilling, meets the requirements of rapidness and reliability, ensures the safety and smooth proceeding of a long-distance exploration process, meets the engineering exploration requirements, and can promote the development of the horizontal directional drilling engineering exploration technology.
Drawings
FIG. 1 is a schematic sectional view of an embodiment of a water pressure test device for geological exploration of a horizontal directional drilling engineering utilizing water pressure locking according to the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of the water pressure test device for geological exploration of the horizontal directional drilling engineering utilizing water pressure locking in FIG. 1;
FIG. 3 is a schematic cross-sectional view of the water pressure test device A-A' for geological exploration in the horizontal directional drilling engineering using water pressure locking in FIG. 2;
FIG. 4 is a schematic view of a portion of the telescoping lock mechanism of FIG. 2 (with the anchor bar engaging the first ramp notch);
FIG. 5 is a schematic view of a portion of the telescoping locking mechanism of FIG. 2 (with the locking bar unlocked from the first ramp notch);
FIG. 6 is a schematic view of a portion of the telescoping lock mechanism of FIG. 2 (with the anchor bar engaging the second ramp notch);
FIG. 7 is a schematic view of a portion of the retractable locking mechanism of FIG. 2 (with the locking bar unlocked from the second ramp notch);
fig. 8 is a schematic structural diagram of an embodiment of a water pressure test device (connected with a plurality of telescopic locking mechanisms) for geological exploration of horizontal directional drilling engineering, which is provided by the invention and utilizes water pressure locking.
In the figure: the drill rod comprises a front drill rod 1, a rear drill rod 2, an outer pipe 3, an annular groove 31, a first water through hole 32, a spring 33, an inner pipe 4, an annular protruding part 41, an annular limiting space 42, a second water through hole 43, a first annular moving block 5, a third water through hole 51, an annular rotary table 6, a first inclined plane 6a, a first inclined plane notch 61, a second inclined plane notch 62, a fixed strip 7, inclined plane teeth 71, a second annular moving block 8, a strip-shaped groove 81, a protrusion 82, a second inclined plane 82a, a connector 9, an annular plug 10, an inner cavity 11, a high-pressure closed valve 12, a pressure release valve 13 and a connecting drill rod 14.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 8, an embodiment of the present invention provides a water pressure locking type horizontal directional drilling engineering geological exploration water pressure test apparatus, which includes a telescopic locking mechanism, a front drill rod 1 and a rear drill rod 2, wherein the telescopic locking mechanism includes an outer tube 3, an inner tube 4, a first annular moving block 5, an annular rotary table 6, a plurality of fixed bars 7 and a second annular moving block 8.
The outer tube 3 is along extending to the front and back, 3 front ends of outer tube with preceding drilling rod 1 links to each other, 3 front ends of outer tube with preceding drilling rod 1 passes through adapter 9 and connects. The outer side wall of the outer pipe 3 is provided with an annular groove 31 with an outward notch, the annular groove 31 is located on the periphery of the outer pipe 3, the top of the annular groove 31 is provided with an annular plug 10 to form an inner cavity 11, and the bottom wall of the annular groove 31 is provided with a first water through hole 32 in a penetrating manner.
The front end of the inner tube 4 is hermetically connected with the rear end of the outer tube 3, in the embodiment, the front end of the inner tube 4 is in threaded connection with the outer tube 3, the rear end of the inner tube 4 is connected with the rear drill rod 2, and the rear drill rod 2 is provided with a high-pressure closed valve 12. The inner side wall of the front end of the inner tube 4 protrudes forwards to form an annular protruding portion 41, an annular limiting space 42 is formed between the annular protruding portion 41 and the outer tube 3, a second water through hole 43 penetrates through the position, opposite to the first water through hole 32, of the annular protruding portion 41, and the rear end of the horizontal directional drilling engineering geological exploration water-pressing test device locked by water pressure is arranged in a closed mode.
The first annular moving block 5 is located in the annular limiting space 42 and located at the periphery of the annular protruding portion 41, the rear end of the first annular moving block 5 is connected to the front end of the inner tube 4 through a spring 33, a third water through hole 51 is formed in the side wall of the first annular moving block 5 in a penetrating manner, and when the spring 33 is in an initial state, the third water through hole 51 is communicated with the first water through hole 32 and the second water through hole 43 (see fig. 1).
The annular turntable 6 is located at the periphery of the annular protruding portion 41 and located in the annular limiting space 42, the annular turntable 6 is located at the front side of the first annular moving block 5, the front end of the annular turntable 6 is provided with a plurality of first inclined plane notches 61 and a plurality of second inclined plane notches 62 (see fig. 4 to 7) which are alternately arranged forward and sequentially connected, the first inclined plane notches 61 and the second inclined plane notches 62 have first inclined planes 6a in the same inclination direction, and the depth of the first inclined plane notches 61 is greater than that of the second inclined plane notches 62.
A plurality of fixed strips 7 extend along the fore-and-aft direction, along outer tube 3 circumference interval sets up and is fixed in outer tube 3 inside wall, fixed strip 7 rear end be equipped with first inclined plane breach 61 with the inclined plane tooth 71 (please see fig. 4 and fig. 6) that second inclined plane breach 62 meshed mutually, in this embodiment, outer tube 3 with fixed strip 7 is integrated into one piece setting, the production of being convenient for, in other embodiments, outer tube 3 and fixed strip 7 also can the components of a whole that can function independently setting.
The second annular moving block 8 is installed in the annular limiting space 42 in a forward and backward moving manner, is located at the periphery of the annular protruding portion 41, and is located at the front side of the annular turntable 6, the outer side wall of the second annular moving block 8 is provided with a plurality of strip-shaped grooves 81 (see fig. 3) matched with the fixing strips 7, the second annular moving block 8 is hermetically arranged between the outer tube 3 and the side wall of the inner tube 4, the rear end of the second annular moving block 8 is provided with a protrusion 82 protruding backward, and the protrusion 82 abuts against one part of the first inclined surface 6a, and is spaced from the adjacent first inclined surface 6 a. The first inclined plane 6a of the first inclined plane notch 61 and the second inclined plane notch 62 have the same gradient, and the rear side surface of the protrusion 82 is inclined to form a second inclined plane 82a matched with the first inclined plane 6a, so that the rotating stability of the annular turntable 6 can be enhanced.
The rear end of the second annular moving block 8 is provided with a plurality of the protrusions 82, and the plurality of second inclined surfaces 82a correspond to the inclined surfaces of the first inclined surface notches 61 or the inclined surfaces of the second inclined surface notches 62 one to one, so that the stability of the first annular moving block 5 in dragging the annular turntable 6 to move can be enhanced.
When the bevel teeth 71 are engaged with the first bevel notches 61 of the annular turntable 6, the third through water hole 51 is opposite to the first through water hole 32 and the second through water hole 43, so that the interior of the inner tube 4 is communicated with the inner cavity 11; when the bevel teeth 71 are engaged with the second bevel notches 62 of the annular turntable 6, the third water through hole 51 is staggered with the first water through hole 32 and the second water through hole 43, so that the inner cavity 11 is sealed.
The test method based on the water pressure locking horizontal directional drilling engineering geological exploration water pressure test device comprises the following steps:
and S1, after the steps of comprehensive drilling or logging and the like are finished, pulling back and disassembling all drill rods, wherein in order to reduce rock powder blockage, the comprehensive drilling adopts diamond drilling or hard alloy drilling, and the drilling fluid adopts clear water.
In order to analyze and judge the setting position of the plug, the water level in the hole and the inclined direction of the drill hole, the drilling condition can be pre-surveyed through testing instruments such as a television in the hole, underwater sonar and the like, the water level in the hole and the spatial position of the drill hole in different hole sections are determined, the installation position of the plug and the section length of the test section are guided, and the project progress is reasonably planned.
And carrying out a preparation process, selecting a test type according to the field condition and the requirement, and reasonably configuring the device.
Specifically, the length and position of the plugging water stop of the test section can be determined according to specific conditions so as to obtain the real water permeability of the poor stratum pore section. The calculated permeability coefficient is the average value of the plugging hole section, so that the lithological consistency of the plugging section is ensured.
The hole washing adopts a pressurized water hole washing method, in order to ensure that rock powder in the hole is effectively discharged out of the hole, a drilling tool is required to be put down to the bottom of the hole during washing, and the flow rate is larger than the drilling water supply amount; when a borehole washout is to be performed in a fractured formation, the washout time may be reduced or increased as appropriate.
According to the length of the device in a deep drilling hole, the pressure loss of a pipeline is considered, the pressure loss of each meter of drill rod and each pair of joints at different flow rates is measured outside the hole in advance, and a chart is drawn for field use.
The rear end of the device is pushed to enter a designated position in a horizontal drilling hole, water is injected into the front end of the forward drilling rod 1 by using a water pump, the used water pump can be a slurry pump used in the drilling process, and if the slurry pump cannot meet the requirement, the special water pump for the pressurized water test and the matched flow and pressure measuring device with higher precision can be replaced after the complete drilling is finished. Water is injected into the lumen 11 between the inner tube 4, outer tube 3 and the plug, which slowly expands.
S2 increases the water pressure in the inner tube 4 to a preset water pressure, and pushes the second annular moving block 8 to move backward, so as to drive the annular rotary disk 6 and the first annular moving block 5 to move backward, such that the spring 33 is compressed, and when the annular rotary disk 6 moves to a position unlocked from the fixed bar 7 (see fig. 5), since the protrusion 82 abuts against a portion of one of the first inclined surfaces 6a and is spaced from the adjacent first inclined surface 6a, the annular rotary disk 6 can rotate along the direction of the inclined surface teeth 71, and the preset water pressure is the maximum water pressure required in the whole process, it can be understood that the preset water pressure is greater than the expansion pressure of the annular plug 10.
S3 reduces the water pressure in the inner tube 4, and due to the elastic return action of the spring 33, the spring 33 pushes the annular rotary disk 6 to rotate continuously along the direction of the bevel teeth 71, so that the second bevel notch 62 of the first annular moving block 5 is engaged with the bevel teeth 71 of the fixed bar 7 (see fig. 6), and the third water through hole 51 is staggered with the first water through hole 32 and the second water through hole 43, so that the inner cavity 11 is sealed and water cannot be injected into the inner cavity 11 continuously.
S4, reducing the water pressure in the front drill rod 1, opening the high-pressure closed valve 12, injecting water into the drill hole, reducing the water pressure in the inner pipe 4 until the pressure required by the water pressure test, and performing the water pressure test according to the standard. Before the pressurized water test equipment is pushed in, the hole is washed, and the rock debris in the hole is discharged out of the drill hole as far as possible. The high-pressure closing valve 12 is closed at high pressure and opened at low pressure. Specifically, the sealing pressure of the high-pressure sealing valve 12 is smaller than the water pressure which is corresponding to the telescopic locking mechanism and used for pushing the second annular moving block 8 to move backwards, and is larger than the working pressure of the pressurized water test pressurized water step, so that sufficient pressure is guaranteed in the drill rod when the annular plug 10 is sealed, and a water path is smooth when the pressurized water test pressurized water step is carried out.
S5 operates according to step S2 (see fig. 7).
S6 reduces the water pressure in the inner tube 4, and due to the elastic return action of the spring 33, the spring 33 pushes the annular rotary disk 6 to rotate continuously along the bevel teeth 71, so that the first bevel notch 61 of the first annular moving block 5 is engaged with the bevel teeth 71 of the fixed bar 7 (see fig. 4), and the third water through hole 51 is communicated with the first water through hole 32 and the second water through hole 43, so that the high-pressure water in the inner cavity 11 between the outer tube 3 and the plug flows out.
S7, the drill rod is pulled back to carry out the next test, and the equipment is taken out to finish the test.
According to the technical scheme provided by the invention, the length of the test section can be adjusted according to the condition by arranging the telescopic locking mechanism, water is injected into the forward drill rod 1, the second annular moving block 8 is pushed by using the water pressure in the inner pipe 4, so that the rotation of the annular rotary table 6 is controlled, the bevel teeth 71 of the fixed strip 7 are switched between being meshed with the first bevel notch 61 or the second bevel notch 62 of the annular rotary table 6, the communication between the third through water hole 51 and the first through water hole 32 and the second through water hole 43 is further controlled, the pressurization and the deblocking of the plug are realized by using the power in the hole, a set of high-pressure water supply pipeline and a water pump are not required to be additionally arranged, the drill rod is not required to be accurately moved, and the problems that the plug inner cavity 11 is. The device can be used for ordinary vertical drilling, can also realize acquisition of hydrogeological parameters in the overlong horizontal directional drilling, meets the requirements of rapidness and reliability, ensures the safety and smooth proceeding of a long-distance exploration process, meets the engineering exploration requirements, and can promote the development of the horizontal directional drilling engineering exploration technology.
Through being provided with the high pressure seal valve 12 that sealing pressure is less than preset pressure, is greater than the operating pressure of the experimental pressurized-water step of pressurized-water, the drilling rod is inside to have sufficient pressure when having guaranteed that the embolism seals, and the water route is unobstructed when the pressurized-water step that can make the pressurized-water test goes on simultaneously, has ensured going on smoothly of pressurized-water test, has solved current equipment and can't carry out the problem of embolism inflation and pressure release in the directional drilling hole of overlength level.
In this embodiment, the horizontal directional drilling engineering geological exploration pressurized-water test device rear end that utilizes water pressure locking is connected with the relief valve, and is concrete, and back drilling rod 2 realizes the sealing of device rear end through being connected with relief valve 13 to guarantee the safety of equipment, avoid the too big damage that causes device and water pump of water pressure in the device. The opening pressure of the pressure release valve 13 is greater than the water pressure which correspondingly pushes the second annular moving block 8 to move backwards by the telescopic locking mechanism, so that the influence on the plugging process is avoided.
The two telescopic locking mechanisms are connected through the rear drill rod 2 in the front-rear direction, and the water pressure for pushing the second annular moving block 8 to move backwards is different, and the two telescopic locking mechanisms correspond to each other. The single-plug water pressurizing test can be realized only by using one telescopic locking mechanism, and the two telescopic locking mechanisms are connected in series through the connecting drill rod 14 with the high-pressure closed valve 12, so that the plugging of one section of drilled hole can be realized, and the double-plug water pressurizing test can be carried out.
The water pressure (preset pressure) for pushing the second annular moving block 8 to move backwards corresponding to the two telescopic locking mechanisms is different, so that air between the two plugs can be removed, and the problem that the water pressing test in the horizontal drilling cannot exhaust air is solved. The preset pressure of the two telescopic locking mechanisms is different, the plugs with different sizes can be arranged, and the two telescopic locking mechanisms can be placed in different water levels.
Generally, in-hole television surveys prove that most hole sections of a horizontal drilling hole are completely filled with water, but some hole sections are not completely filled with water, when the water level of an inclined section of the horizontal drilling hole is not full, the water pressure for pushing the first annular moving block 5 to move backwards corresponding to the telescopic locking mechanism with relatively high terrain is P1, the water pressure for pushing the first annular moving block 5 to move backwards corresponding to the telescopic locking mechanism with relatively low terrain is P2, wherein P2 is greater than P1.
Based on the device, the test method comprises the following steps:
implementing steps S1 to S3, wherein the preset water pressure is P2, and the inner cavities 11 of the two telescopic locking mechanisms are sealed;
implementing steps S5 and S6, wherein the preset water pressure is P1, and the high-pressure water in the inner cavity 11 of the telescopic locking mechanism with relatively high terrain flows out;
the water pressure in the inner pipe 4 is reduced, the high-pressure closed valve 12 is opened, water is injected into the drill hole, the liquid level in the drill hole is higher than the height of the annular plug 10 with relatively high topography, and therefore air between the two plugs can be removed.
Implementing steps S1 to S3, wherein the preset water pressure is P1, and the inner cavity 11 of the telescopic locking mechanism with relatively high terrain is sealed;
steps S4 to S6 are performed, in which a preset water pressure is P2, and high-pressure water in the inner cavity 11 of the telescopic locking mechanism with a relatively high terrain is discharged.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The utility model provides an utilize water pressure locking's horizontal directional drilling engineering geology reconnaissance water-pressure test device, its characterized in that includes flexible locking mechanism, preceding drilling rod and back drilling rod, flexible locking mechanism includes:
the outer pipe extends in the front-back direction, the front end of the outer pipe is connected with the front drill rod, an annular groove with an outward notch is formed in the outer side wall of the outer pipe, the annular groove is located on the periphery of the outer pipe, an annular plug is arranged at the top of the annular groove to form an inner cavity, and a first water through hole penetrates through the bottom wall of the annular groove;
the front end of the inner pipe is hermetically connected with the rear end of the outer pipe and is positioned in the outer pipe, the rear end of the inner pipe is connected with the rear drill rod, a high-pressure closed valve is arranged on the rear drill rod, the inner side wall of the front end of the inner pipe extends forwards to form an annular protruding portion, an annular limiting space is formed between the annular protruding portion and the outer pipe, a second water through hole penetrates through the position, opposite to the first water through hole, of the annular protruding portion, and the rear end of the horizontal directional drilling engineering geological exploration water pressure test device locked by water pressure is in a closed arrangement;
the first annular moving block is positioned in the annular limiting space and positioned at the periphery of the annular protruding part, the rear end of the first annular moving block is connected with the front end of the inner pipe through a spring, a third water through hole penetrates through the side wall of the first annular moving block, and when the spring is in an initial state, the third water through hole is communicated with the first water through hole and the second water through hole;
the annular turntable is positioned on the periphery of the annular protruding part and in the annular limiting space, the annular turntable is positioned on the front side of the first annular moving block, the front end of the annular turntable is provided with a plurality of first inclined plane notches and a plurality of second inclined plane notches which are alternately arranged and sequentially connected, the first inclined plane notches and the second inclined plane notches are provided with first inclined planes in the same inclination direction, and the depth of the first inclined plane notches is greater than that of the second inclined plane notches;
the fixing strips extend in the front-back direction, are arranged at intervals along the circumferential direction of the outer pipe and are fixed on the inner side wall of the outer pipe, and inclined plane teeth meshed with the first inclined plane notch and the second inclined plane notch are arranged at the rear ends of the fixing strips; and the number of the first and second groups,
the second annular moving block is arranged in the annular limiting space in a forward and backward moving mode, is positioned on the periphery of the annular protruding portion and is positioned on the front side of the annular turntable, a plurality of strip-shaped grooves matched with the fixing strips are formed in the outer side wall of the second annular moving block, the second annular moving block is arranged between the outer pipe and the inner pipe side wall in a sealing mode, a protrusion protruding backwards is arranged at the rear end of the second annular moving block, the protrusion abuts against one of the first inclined surfaces, and the protrusion and the first inclined surfaces are arranged at intervals;
when the bevel teeth are meshed with the first bevel notch of the annular turntable, the third through water hole is opposite to the first through water hole and the second through water hole so as to communicate the inner part of the inner pipe with the inner cavity; when the bevel teeth are meshed with a second bevel notch of the annular turntable, the third through water hole is staggered with the first through water hole and the second through water hole, so that the inner cavity is sealed;
the test method based on the water pressure locking horizontal directional drilling engineering geological exploration water pressure test device comprises the following steps:
s1, pushing the rear end of the device into a designated position in a horizontal drill hole, injecting water into the front end of the forward drill rod, and injecting the water into an inner cavity among the inner pipe, the outer pipe and the plug;
s2, increasing the water pressure in the inner pipe to a preset water pressure, pushing the second annular moving block to move backwards, driving the annular turntable and the first annular moving block to move backwards, compressing the spring, and rotating the annular turntable along the direction of the bevel teeth when the annular turntable moves to the unlocking position with the fixed strip;
s3, reducing the water pressure in the inner pipe, and pushing the annular turntable to continue rotating along the direction of the bevel teeth by the spring, so that the second bevel notch of the first annular moving block is meshed with the bevel teeth of the fixed bar, and the third water through hole is staggered with the first water through hole and the second water through hole, so that the inner cavity is sealed;
s4, reducing the water pressure in the inner pipe until the pressure required by the pressurized water test, and carrying out the pressurized water test according to the specification;
s5 is operated according to step S2;
s6, the water pressure in the inner pipe is reduced, the spring pushes the annular turntable to continue rotating along the direction of the bevel teeth, so that the first bevel notch of the first annular moving block is meshed with the bevel teeth of the fixing bar, the third water through hole is communicated with the first water through hole and the second water through hole, and the high-pressure water in the inner cavity between the outer pipe and the plug flows out;
s7, the drill rod is pulled back to carry out the next test, and the equipment is taken out to finish the test.
2. The apparatus of claim 1, wherein a pressure release valve is connected to the back end of the apparatus.
3. The apparatus for performing geological exploration and water pressure test on horizontal directional drilling engineering by using water pressure locking as claimed in claim 1, wherein the front end of the outer tube is connected with the front drill rod by an adapter.
4. The apparatus for performing geological exploration and water pressure test on horizontal directional drilling engineering using water pressure lock-up as claimed in claim 1, wherein said outer tube is integrally formed with said fixing bar.
5. The apparatus for performing geological exploration and water-pressure test on a horizontal directional drilling engineering using water pressure lock as claimed in claim 1, wherein the first inclined plane notch and the second inclined plane notch have the same inclination of the first inclined plane, and the rear side of the protrusion is inclined to form a second inclined plane matching with the first inclined plane.
6. The apparatus for performing geological exploration and water-pressure test on a horizontal directional drilling engineering utilizing water pressure locking as claimed in claim 1, wherein a plurality of said protrusions are provided at the rear end of said second annular moving block, and a plurality of said second inclined planes correspond to the inclined plane of said first inclined plane notch or the inclined plane of said second inclined plane notch one-to-one.
7. The apparatus for geological exploration and water pressure test of horizontal directional drilling engineering utilizing water pressure locking as claimed in claim 1, wherein there are two said telescopic locking mechanisms, the water pressure for pushing said second annular moving block to move backwards is different for two said telescopic locking mechanisms, and said two said telescopic locking mechanisms are connected through said rear drill rod in the front and rear direction.
8. The water pressure locking type horizontal directional drilling engineering geological exploration water pressure test device is characterized in that the number of the telescopic locking mechanisms is two, the water pressure for pushing the second annular moving block to move backwards corresponding to the two telescopic locking mechanisms is different, and the two telescopic locking mechanisms are connected through the rear drill rod in the front-rear direction;
when the water level of the inclined section of the horizontal drilling hole is not full, the water pressure for pushing the first annular moving block to move backwards corresponding to the telescopic locking mechanism with relatively high terrain is P1, and the water pressure for pushing the first annular moving block to move backwards corresponding to the telescopic locking mechanism with relatively low terrain is P2;
the test method comprises the following steps:
implementing steps S1 to S3, wherein the preset water pressure is P2, and the inner cavities of the two telescopic locking mechanisms are sealed;
implementing steps S5 and S6, wherein the preset water pressure is P1, and the high-pressure water in the inner cavity of the telescopic locking mechanism with relatively high terrain flows out;
reducing the water pressure in the inner pipe, opening the high-pressure closed valve, and injecting water into the drill hole, so that the liquid level in the drill hole is higher than the height of the annular plug with relatively high topography;
implementing steps S1 to S3, wherein the preset water pressure is P1, and the inner cavity of the telescopic locking mechanism with relatively high terrain is sealed;
and executing steps S4 to S6, wherein the preset water pressure is P2, and the high-pressure water in the inner cavity of the telescopic locking mechanism with relatively high terrain flows out.
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