Hydraulic conveying type in-hole in-situ test device and method suitable for directional drilling

Abstract

The invention provides a hydraulic conveying type in-hole in-situ test device and method suitable for directional drilling, and relates to the field of rock mass mechanical tests. The device comprises a rope drill rod, a channel separation device, a guide connection device, a pipeline unlocking device and a test packer system. A side water inlet channel (a test section pressure channel) and a central channel (a rubber plug pressure channel) are arranged in the channel separation device; the guide connecting device is conveyed to the butt joint piston through hydraulic power to be locked, a rubber plug pressure channel is formed, and the packer is driven to expand to seal the test section; and after the test, the pipeline unlocking device is hydraulically conveyed to a target position for unlocking, so that the high-pressure hose can be quickly recycled. According to the method, a traditional hose rod penetrating procedure is omitted, rapid connection and unlocking of the channel are completed through hydraulic conveying, time consumption and drill jamming risks of directional drilling in-hole tests are remarkably reduced, and the deep hole in-situ test efficiency and safety are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rock mass mechanics test, in particular to a water power delivery type in-hole in-situ test device and method suitable for directional drilling. BACKGROUND

[0002] At present, directional drilling technology has been gradually applied universally, and in-hole rock mass test is facing major risk challenges. Water pressure test, hydraulic fracturing method for ground stress test (hereinafter collectively referred to as in-hole hydraulic test) as an important content of deep hole in-situ test often has similar in-hole device structure and test steps. The similarity mainly lies in that the two tests are generally composed of upper and lower inflatable rubber plugs and a middle connecting flower pipe. During testing, the drill pipe is connected and pushed to the test hole section, then the inflatable rubber plug is tightly attached to the hole wall by pressurizing the rubber plug pressure channel to achieve the purpose of sealing the middle test section, and then high-pressure water is delivered into the test section through the test section pressure channel for measurement.

[0003] The inclination angle of directional drilling is generally small or nearly horizontal. The above in-hole hydraulic test is usually achieved by using double pressure pipelines. The rubber plug pressure channel is generally achieved by externally binding the pressure hose to the ordinary drill pipe or internally penetrating the rope drill pipe. The test section pressure channel is achieved by using the drill pipe cavity itself. In view of the fact that the complex stratum directional drilling is more prone to hole collapse and block drop under its own weight, the pipe running of the externally bound hose will increase the risk of test equipment being stuck. Therefore, the internally penetrating rope drill pipe is safer, but the connection of each drill pipe during pipe running needs to pass the hose through the pipe once, which is complicated and time-consuming. In order to operate safely and save pipe running time, the present application proposes a water power delivery type in-hole hydraulic test device and method suitable for directional drilling. First, the high-pressure hose is connected and locked to the end of the test device through water power delivery in the rope drill pipe, forming an independent pressure channel. After the test is completed, the locking is released by the water power delivery unlocking device, so that the high-pressure hose in the drill pipe can be pulled out quickly. The present application can efficiently reduce the time and risk of rope drill pipe double pipeline drilling hydraulic test. SUMMARY

[0004] The present application aims to overcome the deficiencies of the prior art, and provides a water delivery type test device and test method suitable for directional drilling, which can guide the connection device to control the trailing end pressure hose to reach the center docking piston of the packer in the hole through water delivery, realize the self-connection and locking of the pressure hose and the packer, and form a water test rubber plug pressure channel, so that the borehole cavity is the test section pressure channel.

[0005] To solve the above problems, the technical scheme of the present application is as follows:

[0006] A water delivery type in-hole in-situ test device suitable for directional drilling, comprising a high-pressure hose, a high-flow water inlet pipe, a drill pipe plugging device, a rope drill pipe, a pipeline unlocking device, a guide connection device, a docking piston, a channel separation device, and a test packer system.

[0007] One end of the channel separation device is connected with the rope drill pipe, and the other end is connected with the test packer system, and the channel separation device is internally provided with a side water inlet channel and a center channel, which respectively form a test section pressure channel and a rubber plug pressure channel.

[0008] The tail of the docking piston is fixed in the center channel of the channel separation device, the head is provided with a piston cone, and the middle part is provided with a piston locking step.

[0009] The guide connection device is configured to move in the rope drill pipe through water delivery, and the front end is provided with a locking buckle, which can be locked with the piston locking step to close the rubber plug pressure channel.

[0010] One end of the high-pressure hose is connected with the center connecting rod of the guide connection device, and the other end extends to the outside of the hole and is connected with a pressurizing system.

[0011] The pipeline unlocking device is configured to be delivered to the guide connection device through water delivery, and the front end is provided with an unlocking bin for unlocking the locking of the locking buckle and the piston locking step.

[0012] The drill pipe plugging device is arranged at the hole port end of the rope drill pipe, and is provided with a center through hole and a lateral through hole for threading the high-pressure hose and connecting the test section pressure channel, respectively.

[0013] The test packer system expands and seals the test hole section after receiving pressure through the rubber plug pressure channel.

[0014] Further, the test packer system comprises a first packer, a first center rod, a test section connecting nipple, a second packer, a second center rod and a packer blocking member.

[0015] Further, the side water inlet channel of the channel separation device is in communication with the inner cavity of the rope drill rod, forming a test section pressure channel from the inner cavity of the rope drill rod, the side water inlet channel, the flower pipe water outlet hole of the test section connecting nipple to the test hole section; the center channel is in communication with the piston center through hole of the docking piston, forming a packer pressure channel from the high-pressure hose, the center rod, the piston center through hole, the center channel, the shunt channel to the inner cavities of the first packer and the second packer.

[0016] Further, the guide connecting device further comprises a water collecting bin, a supporting roller and a docking bin, the water collecting port of the water collecting bin is a beveled opening, the supporting roller is distributed on the outer wall of the water collecting bin, the docking bin can be sleeved into the pressure channel of the docking piston, and the locking buckle extends into the water collecting bin through the locking plate and the unlocking pressing plate and is elastically connected with the water collecting bin through the reset spring.

[0017] Further, the pipeline unlocking device further comprises a hose centering guide roller, which is symmetrically installed through elastic supporting rods for clamping the high-pressure hose and keeping it centered.

[0018] A hydraulic delivery type in-hole in-situ test method suitable for directional drilling, which is carried out by using the above device, and the method comprises the following steps:

[0019] Assembly and pushing: sequentially connect the test packer system, the channel separation device, the docking piston and the rope drill rod, and push them to the test hole section of the directional drilling, so that the first packer and the second packer are located at both ends of the test hole section;

[0020] Hydraulic delivery and locking:

[0021] After the guide connecting device is connected with the high-pressure hose, it is placed in the rope drill rod, the high-flow interface of the drill rod blocking device is connected to the high-flow pressurizing system, high-pressure water flow is pumped to push the guide connecting device to move along the inside of the rope drill rod;

[0022] The guide connecting device moves to the docking piston, the locking buckle thereof is stretched open under the extrusion of the piston cone head, and is locked by the reset spring when it travels to the piston locking step, forming a packer pressure channel from the high-pressure hose, the piston center through hole, the center channel to the inner cavities of the first packer and the second packer.

[0023] In-hole test:

[0024] The high-pressure hose is connected to the low-flow pressurizing system outside the hole through the central through hole of the drill pipe blocking device, and the pump-in pressure makes the first sealing plug and the second sealing plug expand to seal the test hole section;

[0025] The high-flow pressurizing system is connected through the lateral through hole of the drill pipe blocking device, high-pressure water is pumped into the test hole section through the rope drill pipe inner cavity and the lateral water channel, and the in-hole hydraulic test is performed;

[0026] Unlocking and recycling:

[0027] After the test is completed, the drill pipe blocking device is removed, the pipe unlocking device is sleeved into the high-pressure hose and placed in the rope drill pipe, the drill pipe blocking device is reinstalled and connected to the high-flow pressurizing system;

[0028] The pipe unlocking device is pushed to the guide connecting device by water force, the unlocking plate of the unlocking bin extrudes the locking buckle, the locking buckle is separated from the piston locking step, and the locking is released;

[0029] Device extraction: the high-pressure hose is pulled by the hoisting equipment outside the hole, the guide connecting device, the pipe unlocking device and the high-pressure hose are recycled in sequence, and the rope drill pipe and the test packer system are removed by means of the drilling machine.

[0030] Further, after the plug pressure channel is formed in step 2, the high-pressure hose is sealed through the internal central joint of the drill pipe blocking device, and the external central joint is connected to the hole pressurizing system to isolate the test section pressure channel and the plug pressure channel.

[0031] Further, the hose centering guide wheel of the pipe unlocking device in step 4 clamps the high-pressure hose by elasticity, so that the unlocking bin and the unlocking plate are accurately docked.

[0032] The present application realizes low-cost and high-efficiency double-pipeline hydraulic test by optimizing the test process and equipment combination, and has the following advantages: (1) during the rope drill pipe double-pipeline hydraulic test drilling process, the soft pipe does not need to be inserted inside while the drill pipe is being lowered, which can effectively reduce the drilling time; (2) the hydraulic delivery type pipeline docking technology can realize rapid connection of the sealing plug pressure channel; (3) after the in-hole hydraulic test is completed, the hydraulic delivery type pipeline unlocking technology can quickly complete the pipeline unlocking and realize the rapid recovery of the high-pressure pipeline in the drill pipe. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a schematic diagram of the longitudinal section structure of the in-hole hydraulic test device system of the present application;

[0034] Figure 2Fig. 1 is a schematic diagram of the longitudinal section structure of the drill pipe blocking device of the present application; Fig. 2 is a schematic diagram of the longitudinal section structure of the pipe unlocking device of the present application; Fig. 3 is a schematic diagram of the longitudinal section structure of the pipe guiding and connecting device of the present application; Fig. 4 is a schematic diagram of the longitudinal section structure of the connection and passage distribution of the docking piston and passage separation device of the present application;

[0035] Figure 3 Fig. 5 is a schematic diagram of the first longitudinal section structure of the guiding and connecting device and the docking piston of the present application after being connected; Fig. 6 is a schematic diagram of the first longitudinal section structure of the unlocking device of the present application when being connected to the guiding and connecting device in the unlocking state; Fig. 7 is a schematic diagram of the second longitudinal section structure of the unlocking device of the present application when being connected to the guiding and connecting device in the unlocking state;

[0036] Figure 4 Fig. 8 is a schematic diagram of the passage distribution cross section A-A' structure of the passage separation device of the present application; Fig. 9 is a schematic diagram of the cross section B-B' structure of the locking end of the guiding and connecting device and the docking piston of the present application in the unlocking state; Fig. 10 is a schematic diagram of the cross section C-C' structure of the unlocking bin and the locking plate unlocking pressing plate of the present application in the unlocking state; Fig. 11 is a schematic diagram of the cross section D-D' structure of the soft tube gathering guide wheel and the high-pressure soft tube of the present application in the unlocking state;

[0037] Figure 5 Fig. 12 is a schematic diagram of the working state of the packer of the present application when being pushed to the test depth;

[0038] Fig. 13 is a schematic diagram of the working state of the hydraulic conveying guiding and connecting device of the present application; Fig. 14 is a schematic diagram of the working state of the hole hydraulic test of the present application; Fig. 15 is a schematic diagram of the working state of the hydraulic conveying pipe unlocking device of the present application; Fig. 16 is a schematic diagram of the working state of the device after the pipe is unlocked of the present application.

[0039] The reference signs in the figures are described as follows:

[0040] 1 - high-pressure soft tube; 2 - high-flow soft tube; 3 - drill pipe blocking device;

[0041] 1-1 - tensile steel wire soft tube; 1-2 - pipe joint;

[0042] 3-1 - external center joint, 3-2 - high-flow interface, 3-3 - central through hole, 3-4 - lateral through hole, 3-5 - internal center joint, 3-6 - drill pipe interface;

[0043] 4 - rope drill pipe; 5 - pipe unlocking device;

[0044] 5-1 - water gathering bin, 5-2 - water gathering port, 5-3 - supporting roller, 5-4 - soft tube gathering guide wheel, 5-5 - elastic supporting rod, 5-6 - water blocking disc, 5-7 - anti-skid tooth groove, 5-8 - unlocking bin, 5-9 - horn-shaped opening.

[0045] 6 - guide connecting device;

[0046] 6-1 water storage bin, 6-2 water collection port, 6-3 support roller, 6-4 unlocking pressure plate, 6-5 pressure plate anti-skid tooth groove, 6-6 center connecting rod, 6-7 reset spring, 6-8 rotating shaft base, 6-9 locking plate, 6-10 sealing ring, 6-11 docking bin, 6-12 locking buckle;

[0047] 7 - docking piston;

[0048] 7-1 piston cone head, 7-2 piston center through hole, 7-3 piston locking step;

[0049] 8 - channel separation device;

[0050] 8-1 side water inlet channel, 8-2 center channel, 8-3 shunt channel, 8-4 confluence cavity;

[0051] 9 - first sealing plug; 10 - first center rod; 11 - test section connecting flower pipe;

[0052] 11-1 flower pipe water outlet hole, 11-2 plug connecting channel;

[0053] 12 - second sealing plug; 13 - second center rod; 14 - plug plugging piece; 15 - drill hole. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0055] Please refer to Figures 1-5 The present application is applicable to one embodiment of the water delivery type in-situ hydraulic test device for directional drilling, which comprises a high-pressure hose 1, a high-flow water inlet pipe 2, a drill rod plugging device 3, a rope drill rod 4, a pipeline unlocking device 5, a guide connecting device 6, a docking piston 7, a channel separation device 8, and a test packer system (9-14).

[0056] The key innovation of the application is the hydraulic delivery type pressure channel access and release system composed of the channel separation device 8, the docking piston 7, the guide connection device 6, the pipe unlocking device 5 and the drill pipe blocking device 3. After the test packer system (9-14) is pushed to the test selected section of the maximum depth in the hole through the drill pipe, high-pressure and high-speed water flow is pumped from the high-flow interface 3-2 of the drill pipe blocking device 3, the guide connection device 6 is pushed under the action of the high-pressure water flow to drag the tail high-pressure hose 1 to quickly advance in the drill pipe until the docking piston 7 is accessed and locked to form an independent pressure channel, and then the channel separation device 8 enters the packer rubber plug, the rubber plug is inflated to realize the purpose of sealing the test hole section; after the completion of the hydraulic test in the hole, the pipe unlocking device 5 is pushed again through the hydraulic delivery mode to release the central pipe locking, and the purpose of quickly taking out the high-pressure hose 1 in the drill pipe is realized.

[0057] The hydraulic delivery type pressure channel access and release system comprises the channel separation device 8, the docking piston 7, the guide connection device 6, the drill pipe blocking device 3 and the pipe unlocking device 5.

[0058] The channel separation device 8, one end of which is connected with the rope drill pipe 4 and the docking piston 7 and the other end of which is connected with the test packer system (9-14), comprises: a plurality of built-in side water inlet channels 8-1 converging in a confluence cavity 8-4 (see Figure 2 (d) of the drawings), forming a test section pressure channel composed of the inner cavity of the rope drill pipe 4, the plurality of side water inlet channels 8-1, the confluence cavity 8-4, the through hole of the first central rod 10, the central through hole of the test section connecting flower pipe 11 and the flower pipe water outlet hole 11-1; a built-in central channel 8-2 connecting a plurality of shunt channels 8-3 (see Figure 2 (d) of the drawings), forming a rubber plug pressure channel composed of the central through hole 7-2 of the docking piston, the central channel 8-2, the shunt channel 8-3, the cavity between the first packer rubber plug 9 and the first central rod 10, the rubber plug connecting channel 11-2 and the cavity between the second packer rubber plug 12 and the second central rod 13;

[0059] The docking piston 7 comprises a piston cone head 7-1, a piston central through hole 7-2 and a piston locking step 7-3 (see Figure 2 (d) of the drawings), the piston cone head 7-1 is conical to facilitate docking with the guide connection device 6, and the tail of the docking piston 7 can extend into and be fixed in the central channel 8-2 of the channel separation device 8;

[0060] The guide connection device 6 comprises a water collecting bin 6-1, a water collecting port 6-2, a supporting roller 6-3, an unlocking pressure plate 6-4, an anti-skid tooth groove 6-5, a central connecting rod 6-6, a reset spring 6-7, a rotating shaft base 6-8, a locking plate 6-9, a sealing ring 6-10, a docking bin 6-11 and a locking buckle 6-12.

[0061] The water collecting warehouse 6-1 is slightly smaller in diameter than the inner wall of the rope drill pipe 4, and the water collecting port 6-2 is a beveled opening, which can gather the high-pressure water flow to generate a larger thrust in the cavity, the supporting rollers 6-3 are distributed around the outer wall of the water collecting warehouse, the supporting and guiding connecting device 6 is in the middle and reduces the resistance to achieve fast movement, the water collecting warehouse 6-1 is reduced in diameter in the middle section and transitions to the butt joint end, the center connecting rod 6-6 can connect the pressure hose 1 and the butt joint end, the butt joint end includes a butt joint warehouse 6-11, a sealing ring 6-10 and locking members on both sides of the butt joint warehouse, the locking members are composed of two pieces, the locking plates 6-9 are fixed on the symmetrically two sides of the butt joint warehouse 6-11 through the rotating shaft base 6-8, the unlocking pressure plate 6-4 at one end of the locking plate can extend into the water collecting warehouse 6-1 through the preset window at the bottom of the water collecting warehouse 6-1 and is supported by the return spring 6-7, the anti-skid tooth grooves 6-5 are uniformly distributed on the contact surface of the unlocking pressure plate 6-4, the locking buckle 6-12 at the other end of the locking plate is gradually opened by the extrusion of the butt joint piston cone head 7-1, the unlocking pressure plate 6-4 is linked to rotate around the rotating shaft base 6-8 to compress the return spring 6-7, and the locking of the locking buckle 6-12 and the butt joint piston 7 is completed by the spring rebound when the piston locking step 7-3 is reached, see Figure 2 in (c) and Figure 3 in (a);

[0062] The high-pressure hose 1 is selected according to the maximum test depth, a plurality of pressure hoses are connected in series, each pressure hose 1 is composed of a tensile steel wire hose 1-1 and a pipe joint 1-2 (see Figure 2 in (c)), the pipe joint 1-2 is connected to the center connecting rod 6-6 of the guiding connecting device, which can connect the hole plug pressure channel and the hole external pressure system, and the packer plug is inflated by the pressure outside the hole through the pressure hose 1;

[0063] The pipe releasing device 5 includes a water collecting warehouse 5-1, a water collecting port 5-2, supporting rollers 5-3, a hose collecting guide wheel 5-4, an elastic supporting rod 5-5, a water blocking circular plate 5-6, anti-skid tooth grooves 5-7, an unlocking warehouse 5-8 and a horn-shaped opening 5-9.

[0064] The water collecting warehouse 5-1 is slightly smaller in diameter than the inner wall of the rope drill pipe 4, and the water collecting port 5-2 is a beveled opening, which can gather the high-pressure water flow to generate a larger thrust in the cavity, the supporting rollers 5-3 are distributed around the outer wall of the water collecting warehouse, the supporting pipeline release device 5 is in the middle and reduces the resistance to realize fast movement; in order to improve the water flow thrust, a water blocking disc 5-6 is arranged at the bottom of the water collecting warehouse, the center hole is a horn mouth, which can guarantee that the pressure pipe joint 1-2 can pass through smoothly; the hose collecting guide wheel 5-4 is symmetrically installed on the edge of the water blocking disc 5-6 through the elastic supporting rod 5-5, the symmetric guide wheel is an arc concave surface, which clamps and keeps the pressure hose 1 centered, and the elastic supporting rod 5-5 can be elastically adjusted to ensure that the pipe joint 1-2 can pass through stably; the unlocking port is the unlocking warehouse 5-8, the inner wall is uniformly distributed with anti-skid tooth grooves 5-7, the end is a horn-shaped opening 5-9, when the hydraulic transportation is transported to the port of the guide connecting device 6, the horn-shaped opening 5-9 can easily be sleeved into the unlocking pressure plate 6-4 and compress the reset spring 6-7, through the shaft base 6-8 linkage to make the locking buckle 6-12 gradually open, after the hydraulic transportation is finished, the anti-skid tooth grooves 5-7 on the inner wall of the unlocking warehouse and the anti-skid tooth grooves 6-5 on the unlocking pressure plate are engaged with each other and do not slip, at this time, the guide connecting device 6 and the butt joint piston 7 are unlocked, see Figure 3 (b) and Figure 3 (c) in the middle;

[0065] The rope drill pipe 4 adopts a drill pipe matched with a drilling platform, one end is connected with the channel separation device 8, and the other end is connected with the drill pipe plugging device 3, which can facilitate the cooperation of the drilling machine for testing;

[0066] The drill pipe plugging device 3 comprises an external center joint 3-1, a high-flow interface 3-2, a center through hole 3-3, a lateral through hole 3-4, an internal center joint 3-5 and a drill pipe interface 3-6.

[0067] The external center joint 3-1 can be connected with a low-flow pressurizing system, the internal center joint 3-5 can be connected with the high-pressure hose 1, the high-flow interface 3-2 can be connected with a high-flow pressurizing system through the high-flow hose 2, and the drill pipe interface 3-6 is connected with the orifice rope drill pipe 4 (see Figure 2 (a)); when the hydraulic transportation guide connecting device 6 or the unlocking device 5 is used, the external center joint 3-1 and the internal center joint 3-5 need to be removed in advance, at this time, the high-pressure hose 1 can freely shuttle through the center through hole 3-3; when the hydraulic test in the hole is carried out, the external center joint 3-1 and the internal center joint 3-5 need to be installed in advance, the internal center joint 3-5 is connected with the high-pressure hose 1, the communication between the low-flow pressurizing system outside the hole and the cavity of the packer inside the hole is realized, and the communication into the inner cavity of the rope drill pipe 4 is realized through the high-flow interface 3-2 and the lateral through hole 3-4, so that the communication of the test section pressure channel is realized.

[0068] When the hydraulic transportation type hydraulic test suitable for directional drilling is carried out by using the present application, the specific steps include the following steps:

[0069] First, the hole test device system (7~14) is assembled and pushed to the selected deepest test hole section by connecting the rope drill pipe 4, at which time the working state is as shown in Figure 5 (a) of FIG. 2;

[0070] Second, the number of required hoses is calculated according to the test depth and connected in series to form a high-pressure hose channel 1. The center joints 3-1 and 3-5 at both ends of the drill pipe blocking device 3 are removed, the central through hole 3-3 of the drill pipe blocking device 3 is kept unblocked, one end of the connected pressure hose 1 is connected to the center rod 6-6 of the guide connection device 6 through the central through hole 3-3, the guide connection device 6 is placed inside the rope drill pipe 4 and the drill pipe blocking device 3 is installed, the high-flow hose 2 is connected to the high-flow pressurizing system to the interface 3-2 of the drill pipe blocking device 3, at which time the working state is as shown in Figure 5 (b) of FIG. 2;

[0071] Third, the high-flow pressurizing system pumps high-pressure high-speed water flow into the drill pipe, the high-speed water flow pushes the guide connection device 6 into the cavity 6-1 and pulls the pressure hose 1 to move forward, the support roller 6-3 ensures that the guide connection device 6 moves quickly inside the drill pipe and keeps the end centered, the pushing speed can be controlled by adjusting the flow rate of the pumped water flow, at which time the water at the front end of the guide connection device 6 in the rope drill pipe 4 will be squeezed and pushed in, and will enter the drill hole from the flower pipe water outlet hole 11-1 of the test section connection flower pipe 11 along the test section pressure channel path and then return to the borehole, at which time the working state is as shown in Figure 5 (b) of FIG. 2;

[0072] Fourth, when the guide connection device 6 is connected to the docking piston 7, the piston cone head 7-1 is inclined and can smoothly push open the guide connection device 6 lock buckle 6-12 into the docking chamber 6-11, and then pass through the sealing ring 6-10 until the lock buckle 6-12 is locked at the piston lock step 7-3 to lock the guide connection device 6 and the docking piston 7, and finally form a channel from the pressure hose 1, the center rod 6-6 through hole, the docking chamber 6-11, the piston center through hole 7-2, the built-in center channel 8-2 and the shunt channel 8-3 into the test device system inflatable plug inner cavity, i.e. the test system plug pressure channel, the working state is as shown in Figure 3 (a) of FIG. 3;

[0073] Fifth, the drill pipe blocking device 3 is removed, the center joints 3-1 and 3-3 are installed at both ends, the internal center joint 3-3 connects the drill pipe internal pressure hose 1, and the drill pipe blocking device 3 is installed back to the end of the rope drill pipe 4, the external center joint 3-1 is connected to the low-flow high-pressure pressurizing system outside the hole through the ground pressure hose, and the pipe interface 3-2 is connected to the hole outside the high-flow pressurizing system through the high-flow hose 2, at which time the entire test system is ready;

[0074] The sixth step is to carry out the hole hydraulic test. First, start the low-flow pressurization system, and the pressure water enters the first packer lumen through the central passage of the drill pipe sealing device 3 and the pressure passage of the drill pipe rubber plug, and then enters the second packer lumen through the rubber plug connecting passage 11-2 (the space between the first sealing rubber plug 9 and the first central rod 10); after being pressurized to the test set pressure, the first sealing rubber plug 9 and the second sealing rubber plug 12 expand tightly against the hole wall to realize the sealing isolation of the intermediate test hole section; then start the high-flow pressurization system, adjust the appropriate flow, and at this time the high-pressure water flow can enter the drill hole test section along the test section pressure passage through the lateral hole 3-4 of the drill pipe sealing device 3 to carry out the corresponding hydraulic test, and at this time the working state is as shown in FIG. Figure 5 (c);

[0075] The seventh step is to remove the drill pipe sealing device 3 after the first hydraulic test is completed, and if other test section tests are needed, the drill pipe is extracted to the next test position, and at the same time the corresponding length of the pressure hose in the drill pipe is removed, and the fifth step and the sixth step are repeated to complete the next test section test work.

[0076] The eighth step is to remove the drill pipe sealing device 3 and the central joints 3-1 and 3-3 at both ends after the hydraulic test of all test sections in the selected range is completed, to put the unlocking device 6 into the rope drill pipe 4 from the hole of the high-pressure hose 1, and then put the pressure hose 1 into the central hole 3-3, re-install the drill pipe sealing device 3, and connect the high-flow hose 2 to the drill pipe sealing device 3 interface 3-2 again. Pull the high-pressure hose 1 tightly outside the hole to keep it in a tight state in the drill pipe, start the pressurization system, and the high-speed water flow will push the unlocking device 5 along the pressure hose 1, and the supporting roller 5-3 will ensure that the unlocking device 5 moves quickly in the drill pipe and keeps the end always centered, and the hose centering guide wheel 5-4 can ensure that the pressure hose 1 is centered and the sliding friction is reduced, so that the unlocking device 5 can smoothly pass through the pressure hose 1 in the drill pipe 4, and at this time the working state is as shown in FIG. Figure 1 and Figure 5 (d);

[0077] The ninth step is that as the high-pressure water flow continues to be injected, the unlocking device 5 front end horn-shaped opening 5-9 will be inserted into the locking clamp unlocking plate 6-4 of the guide connecting device 6, and under the end water flow extrusion, the unlocking bin 5-8 will gradually compress the reset spring 6-7 to make the locking buckle 6-12 open, so as to realize the disengagement with the piston locking step 7-3, and at this time the tight state of the high-pressure hose 1 outside the hole will be released, and then the drill pipe sealing device 3 is removed, and the high-pressure hose 1 in the drill pipe, the front unlocking device 5 and the guide connecting device 6 can be quickly pulled out by the winch, and at this time the working state is as shown in FIG. Figure 5 (e);

[0078] The tenth step is to remove the drill pipe 4 in the hole by the drilling machine, and finally remove the in-hole test packer system (9-14).

[0079] The application has the following characteristics and effects through the hydraulic conveying type guide connection and unlocking, double-channel independent control and integrated sealing design:

[0080] 1. Greatly improving construction efficiency

[0081] Through the hydraulic conveying guide connection device, automatic docking and locking of the high-pressure hose and the in-hole packer system are realized, the hose threading process during connection of each drill pipe in the traditional way is saved, and the time for drilling down is reduced; the pipeline unlocking device quickly releases the locking through hydraulic conveying, and all high-pressure hoses can be recycled at one time after the test, avoiding the complicated operation of disassembling in sections.

[0082] 2. Reducing operation risk

[0083] The channel separation device separates the test section pressure channel (the inner cavity of the rope drill pipe) and the rubber plug pressure channel (the central channel) independently, avoiding the risk of in-hole blockage caused by the cross interference of the traditional external binding type double pipeline; the high-pressure hose is built-in throughout, and the in-hole test equipment is designed to be rigidly connected with the rope drill pipe with the same diameter, ensuring that the outer diameter of the entire in-hole test system is consistent and has a small gap with the hole wall, which can effectively reduce the risk of sticking and falling in the process of hydraulic testing under the condition of small inclination / near-horizontal working condition of directional drilling.

[0084] 3. Enhanced operation convenience and adaptability

[0085] The support roller of the guide connection device and the beveled opening of the water collecting bin ensure that the center is stable during the hydraulic conveying process, and adapt to the curved trajectory of directional drilling in complex strata; the test packer system is inflated and sealed synchronously through the rubber plug pressure channel, the test section isolation precision is high, and can meet the needs of various in-situ test requirements such as water pressure test and ground stress test.

[0086] The application can greatly save time and reduce the risk of pulling out the drill, thereby producing obvious economic benefits, improving the efficiency of drilling and testing, reducing the cost of testing, and the method is simple to operate and requires low equipment, which is convenient for large-scale popularization and application.

[0087] The above is only a specific embodiment of the application, but the protection scope of the application is not limited thereto, any changes or replacements within the technical scope disclosed by the application can be easily thought of by any person skilled in the art, which should be covered within the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A hydraulic conveying in-situ testing device for directional drilling, characterized in that, Includes high-pressure hose (1), high-flow inlet pipe (2), drill pipe plugging device (3), wireline drill pipe (4), pipeline unlocking device (5), guide connection device (6), docking piston (7), channel separation device (8) and test packer system (9~14). One end of the channel separation device (8) is connected to the rope drill rod (4), and the other end is connected to the test packer system (9~14). The channel separation device (8) has a built-in side water inlet channel (8-1) and a central channel (8-2), which respectively form a test section pressure channel and a rubber plug pressure channel. The tail of the docking piston (7) is fixed in the central channel (8-2) of the channel separation device (8), and its head is provided with a piston cone (7-1) and the middle is provided with a piston locking step (7-3). The guiding connection device (6) is configured to move within the rope drill rod (4) via hydraulic transmission. Its front end is provided with a locking buckle (6-12), which can be locked with the piston locking step (7-3) to close the rubber plug pressure channel. One end of the high-pressure hose (1) is connected to the center connecting rod (6-6) of the guiding connection device (6), and the other end extends to the outside of the hole and is connected to the pressurization system; The pipeline unlocking device (5) is configured to be hydraulically delivered to the guiding connection device (6), and its front end is provided with an unlocking chamber (5-8) for releasing the locking buckle (6-12) from the piston locking step (7-3); The drill pipe sealing device (3) is set at the orifice end of the wire rope drill pipe (4), and it has a central through hole (3-3) and a side through hole (3-4), which are used to pass through the high pressure hose (1) and the pressure channel of the connecting test section, respectively. The test packer system (9-14) receives pressure through the rubber stopper pressure channel and then expands to seal the test hole section.

2. The apparatus according to claim 1, characterized in that, The test packer system (9~14) includes a first packer plug (9), a first center rod (10), a test section connecting tube (11), a second packer plug (12), a second center rod (13), and a plug sealing component (14).

3. The apparatus according to claim 2, characterized in that, The side water inlet channel (8-1) of the channel separation device (8) is connected to the inner cavity of the rope drill rod (4), forming a test section pressure channel from the inner cavity of the rope drill rod (4), the side water inlet channel (8-1), the water outlet hole (11-1) of the test section connecting flower pipe (11) to the test hole section; the central channel (8-2) is connected to the piston central through hole (7-2) of the docking piston (7), forming a rubber plug pressure channel from the high pressure hose (1), the central connecting rod (6-6), the piston central through hole (7-2), the central channel (8-2), the diversion channel (8-3) to the inner cavity of the first sealing rubber plug (9) and the second sealing rubber plug (12).

4. The apparatus according to claim 1, characterized in that, The guiding connection device (6) further includes a water collection tank (6-1), a support roller (6-3), and a docking chamber (6-11). The water collection port (6-2) of the water collection tank (6-1) is obliquely cut. The support roller (6-3) is distributed on the outer wall of the water collection tank (6-1). The docking chamber (6-11) can be fitted into the docking piston (7) to form a pressure channel. The locking buckle (6-12) extends into the water collection tank (6-1) through the locking plate (6-9) and the unlocking pressure plate (6-4) and is elastically connected to the water collection tank (6-1) through the return spring (6-7).

5. The apparatus according to claim 1, characterized in that, The pipeline unlocking device (5) also includes a hose centering guide wheel (5-4), which is symmetrically installed by an elastic support rod (5-5) to clamp the high-pressure hose (1) and keep it centered.

6. A hydraulic conveying in-situ test method for directional drilling, characterized in that, The method, performed using the apparatus described in any one of claims 1-5, comprises the following steps: Assembly and Push: Connect the test packer system (9~14), channel separation device (8), docking piston (7) and wire drill rod (4) in sequence, and push them to the test hole section of the directional drilling, so that the first packer plug (9) and the second packer plug (12) are located at both ends of the hole section to be tested; Hydraulic transport and locking: After connecting the guide connection device (6) to the high pressure hose (1), place it inside the rope drill rod (4), and connect it to the high flow pressurization system through the high flow interface (3-2) of the drill rod sealing device (3). Pump in high pressure water flow to push the guide connection device (6) to move along the inside of the rope drill rod (4); The guide connection device (6) moves to the docking piston (7), and its locking buckle (6-12) is squeezed open by the piston cone (7-1). When it moves to the piston locking step (7-3), it is locked by the return spring (6-7), forming a rubber plug pressure channel from the high pressure hose (1), the piston center through hole (7-2), the center channel (8-2) to the inner cavity of the first sealing rubber plug (9) and the second sealing rubber plug (12); In-hole test: The high-pressure hose (1) is connected to the low-flow pressurization system outside the hole through the central through hole (3-3) of the drill pipe plugging device (3). The pumped pressure causes the first sealing plug (9) and the second sealing plug (12) to expand and seal the test hole section. The high-flow pressurization system is connected through the side through hole (3-4) of the drill pipe plugging device (3), and high-pressure water is pumped into the test hole section through the inner cavity of the wire rope drill pipe (4) and the side water inlet channel (8-1) to conduct the in-hole hydraulic test; Unlocking and Recycling: After the test is completed, remove the drill pipe sealing device (3), put the pipeline unlocking device (5) into the high pressure hose (1) and place it inside the rope drill pipe (4), reinstall the drill pipe sealing device (3) and connect it to the high flow pressurization system; When the hydraulic push pipeline unlocking device (5) reaches the guide connection device (6), its unlocking chamber (5-8) squeezes the unlocking pressure plate (6-4) of the locking buckle (6-12), causing the locking buckle (6-12) to disengage from the piston locking step (7-3) and release the lock; Device removal: Pull the high-pressure hose (1) with the external hoisting equipment, and retrieve the guide connection device (6), pipeline unlocking device (5) and high-pressure hose (1) in sequence. Remove the rope drill rod (4) and test packer system (9~14) with the help of the drilling rig.

7. The method according to claim 6, characterized in that, After the rubber plug pressure channel is formed in step 2, the high pressure hose (1) is sealed by the internal center joint (3-5) of the drill rod sealing device (3), and the external pressure system is connected to the hole through the external center joint (3-1) to isolate the test section pressure channel from the rubber plug pressure channel.

8. The method according to claim 6, characterized in that, In step 4, the hose center guide wheel (5-4) of the pipeline unlocking device (5) clamps the high-pressure hose (1) to ensure that the unlocking chamber (5-8) and the unlocking pressure plate (6-4) are precisely connected.

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