CN113309508B - Ground stress testing equipment and testing method applied to water burst of drill hole opening - Google Patents
Ground stress testing equipment and testing method applied to water burst of drill hole opening Download PDFInfo
- Publication number
- CN113309508B CN113309508B CN202110764236.2A CN202110764236A CN113309508B CN 113309508 B CN113309508 B CN 113309508B CN 202110764236 A CN202110764236 A CN 202110764236A CN 113309508 B CN113309508 B CN 113309508B
- Authority
- CN
- China
- Prior art keywords
- pipe
- water flow
- communicated
- water
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 198
- 238000012360 testing method Methods 0.000 title claims abstract description 114
- 238000009662 stress testing Methods 0.000 title claims description 33
- 238000005553 drilling Methods 0.000 claims abstract description 8
- 239000002775 capsule Substances 0.000 claims description 34
- 238000012856 packing Methods 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 abstract description 6
- 238000010998 test method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 17
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a ground stress test device and a test method applied to water burst of a drill hole opening, wherein the ground stress test device comprises: the sliding device, the converter, the upper packer, the test tube and the lower packer are sequentially communicated from top to bottom; the first water flow pipeline is communicated with the axial center positions of the converter, the upper packer, the test tube and the lower packer in sequence; at least one pair of second water flow pipes which are communicated with the converter, the upper packer, the test tube and the lower packer in sequence and are positioned on the opposite sides of the first water flow pipe; the end, far away from the converter, of the slider is connected through a drilling rod, the drilling rod is used for injecting water into the slider, the drilling rod is used for placing the test equipment into a drill hole through being connected with the slider to carry out ground stress test, and the device can be widely applied to the technical field of engineering geological experiment tests.
Description
Technical Field
The invention relates to the technical field of engineering geology experiment tests. More particularly, the invention relates to a ground stress testing device and a testing method applied to water burst of a drill hole opening.
Background
Under the conditions that high-pressure bearing water exists in the drill hole and the water inflow amount of the orifice is large, the push-pull valve is ensured to firstly perform high-pressure clear water injection on the upper section packer and the lower section packer, and when the pressure in the upper section packer and the pressure in the lower section packer meet the requirement, high-pressure clear water injection on the fracturing section is performed, so that the ground stress value is obtained.
In the existing hydrofracturing method ground stress measurement fracturing test process, a drill rod is usually used as a connecting rod of ground stress test equipment and is lowered to a fracturing pre-selection section, and the water flow of the ground stress test equipment is poured through a sealing drill rod. When higher confined water exists in the drill hole, larger upward or outward impact force can be generated on the ground stress testing equipment, the slider cannot normally stretch and retract, the push-pull valve is in a state of being communicated with the testing pipe, and the push-pull valve cannot be communicated with the upper section packer and the lower section packer under the impact action of the confined water in the process of lifting and lowering the drill rod, so that the fracturing test cannot be realized.
Disclosure of Invention
The invention aims to provide a ground stress testing device and a testing method applied to water burst of a drill hole opening.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided an earth stress testing apparatus applied to a bore hole gushing water, the earth stress testing apparatus including:
the sliding device, the converter, the upper packer, the test tube and the lower packer are sequentially communicated from top to bottom;
the first water flow pipeline is communicated with the axial center positions of the converter, the upper packer, the test tube and the lower packer in sequence;
at least one pair of second water flow pipes which are communicated with the converter, the upper packer, the test tube and the lower packer in sequence and are positioned on the opposite sides of the first water flow pipe;
and one end of the slider, which is far away from the converter, is connected through a drill rod, the drill rod is used for injecting water into the slider, and the drill rod is used for lowering the test equipment into a drill hole through connecting the slider to carry out ground stress test.
Preferably, the slider includes:
the both ends of slip pipe are free open end, the slip pipe includes:
a first limiting part; the inner side wall of the sliding pipe is arranged in a protruding mode and is positioned at one free opening end position;
a second limiting part; the first limiting part is arranged on the inner side wall of the sliding pipe in a protruding mode;
a first flow pipe section which is a section between the first limit part and the second limit part in the sliding pipe;
the second water flow pipe section is a section of the sliding pipe, which is positioned outside the second limiting part;
the first limiting part and the second limiting part are both annular and are attached to the inner wall of the sliding pipe;
one end of the connecting pipe is a sealing end, the other end of the connecting pipe is an opening end, and the opening end of the connecting pipe extends out of the sliding pipe and is connected with the drill rod; the connection pipe includes:
the first drainage hole penetrates through the opposite side walls of the sliding pipe;
one end of the first water flow pipe is communicated with the first water flow pipe section, and the other end of the first water flow pipe is communicated with the second water flow pipe section;
the limiting ring is sleeved on the connecting pipe, and the first limiting part and the second limiting part limit the limiting ring;
when the limiting ring is in contact with the first limiting part and is limited, the first water drainage hole is correspondingly communicated with the first water flow pipe, and when the limiting ring is in contact with the second limiting part and is limited, the first water drainage hole is correspondingly communicated with the second water flow pipe.
Preferably, the converter comprises: a solid section and a channel section, the channel section being disposed along a length direction of an interior of the solid section for forming a water flow channel, the channel section comprising:
one end of the second water flow pipe is communicated with the first water flow pipe, and the other end of the second water flow pipe is communicated with the upper packer;
a third water flow pipe, which is positioned in the middle of the solid body section, wherein one end of the third water flow pipe is communicated with the second water flow pipe section of the sliding pipe, and one end of the third water flow pipe, which is far away from the second water flow pipe section, is communicated with the upper packer;
a fourth water flow tube comprising:
a first branch pipe, one end of which is communicated with the third water flow pipe, and one end of the first branch pipe, which is far away from the third water flow pipe, is communicated with the upper packer;
the water flow pipe comprises a first branch pipe and a second branch pipe, wherein one end of the first branch pipe is communicated with the water flow pipe;
the first one-way valve is arranged on the third water flow pipe;
the second one-way valve is arranged on the first branch pipe;
the third one-way valve is arranged on the third branch pipe;
the pressure valve is arranged on the second branch pipe;
the hydraulic valve is communicated with the connecting end part of the second branch pipe and the third branch pipe;
and the electromagnetic change-over switch is communicated with the second branch pipe and the third branch pipe and is used for controlling the flow path of the second branch pipe or the third branch pipe.
Preferably, the upper packer comprises:
one end of the first packing capsule is connected with the converter, and one end of the first packing capsule, which is far away from the converter, is communicated with the test tube; the first containment capsule comprises:
a first capsule cavity in communication with the second water flow tube and a first branch tube;
and the first guide pipe is positioned at the middle axle center of the first capsule cavity, one end of the first guide pipe is communicated with the third water flow pipe, and one end of the first guide pipe, which is far away from the third water flow pipe, is communicated with the test pipe.
Preferably, the test tube comprises:
the side wall of the body is provided with at least one pair of second drainage holes in a penetrating manner;
one ends of the pair of draft tubes are communicated with the upper packer, and the ends of the pair of draft tubes, which are far away from the upper packer, are communicated with the lower packer;
and one end of the second flow guide pipe is communicated with the first flow guide pipe of the upper packer, and one end, far away from the first flow guide pipe, of the second flow guide pipe is communicated with the lower packer.
Preferably, the lower packer comprises:
one end of the second packing capsule is connected with the test tube, and one end of the second packing capsule, which is far away from the test tube, is sealed; the second containment capsule comprises:
a second capsule chamber in communication with the pair of draft tubes;
and the third flow guide pipe is communicated with the second flow guide pipe of the test pipe.
Preferably, the threshold value of the pressure valve is 5 MPa.
Preferably, the slider, the converter, the upper packer, the test tube and the lower packer are detachably connected through bolts.
A test method of a ground stress test device applied to water burst of a drill hole orifice is characterized by comprising the following steps:
step S1, installing and debugging equipment;
installing and debugging the ground stress test equipment on the ground, and testing the sealing performance and the liquidity of the ground stress test equipment;
step S2, lowering the equipment to the experiment position and carrying out the test of the hydraulic fracturing method;
lowering the ground stress testing equipment which is installed and debugged to an orifice of a drill hole to form hydraulic seal inside the ground stress testing equipment, and then lowering the ground stress testing equipment into the drill hole to perform a hydraulic fracturing method test;
step S3, recording test data;
and recording the test process of the ground stress test equipment in the hydrofracturing method.
Preferably, the step S1 further includes:
and setting a threshold value when testing the tightness of the ground stress testing equipment, and carrying out pressure test on the ground stress testing equipment to ensure that the ground stress testing equipment cannot leak water when the pressure is within 15 MPa.
The invention at least comprises the following beneficial effects:
1. the invention provides a ground stress testing device applied to water burst of a drill hole opening, which can realize that the ground stress testing device can still perform the fracturing test under the condition that a push-pull valve cannot stretch and retract when the bottom of the ground stress device bears the impact of pressure-bearing water in the fracturing test process. Firstly, preparing and installing equipment on the ground surface, then carrying out pressurization and constant pressure test on the equipment on the ground surface, ensuring the sealing property of the equipment, and finally, carrying out drilling and lowering by the test equipment to a fracturing pre-selection section. In the process of lowering the ground stress testing equipment, the confined water in the drill hole generates an upward or outward impact force on the ground stress testing equipment, and particularly when the drill hole penetrates through a confined water layer, the water inflow of the measuring section is larger, and the acting force on the ground stress testing equipment is more prominent. The ground stress testing equipment can realize the fracturing test under the condition that the water inflow exists in the drilled hole, and comprises the following components: the sliding device, the converter, the upper packer, the test tube and the lower packer are sequentially communicated from top to bottom; and the first water flow pipeline and the at least one pair of second water flow pipelines are arranged, when the ground stress testing equipment does not enter the drill hole, water flows enter from the first water flow pipeline, when the ground stress testing equipment enters the drill hole orifice, a large amount of water gushes in the hole, the water pressure exceeds the dead weight of the ground stress testing equipment, so that the first pipeline cannot form a water flow channel, and at the moment, the second water flow pipeline is switched to enable the ground stress testing equipment to integrally keep smooth, and then the ground stress testing experiment is completed.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic structural diagram of an overall structure of a ground stress testing device applied to water gushing of a drilling hole orifice of the invention;
FIG. 2 is a schematic view of the slider structure of the present invention;
FIG. 3 is a schematic diagram of a converter according to the present invention;
FIG. 4 is a schematic view of the upper packer of the present invention;
FIG. 5 is a schematic view of a test tube according to the present invention;
FIG. 6 is a schematic view of the construction of the lower packer of the present invention;
description of reference numerals: 1. the device comprises a slider, 2, a converter, 3, an upper packer, 4, a test tube, 5, a lower packer, 101, a sliding tube, 102, a connecting tube, 103, a first limiting part, 104, a second limiting part, 105, a first water drainage hole, 106, a limiting ring, 107, a first water flow tube, 108, a first water flow tube section, 109, a second water flow tube section, 201, a second water flow tube, 202, a third water flow tube, 203, a fourth water flow tube, 204, a first branch tube, 205, a second branch tube, 206, an electromagnetic change-over switch, 207, a third branch tube, 208, a pressure valve, 209, a hydraulic valve 301, a first capsule cavity, 302, a first flow tube, 303, a first capsule with a sealed cavity, 401, a body, 402, a second flow tube, 403, a second water drainage hole, 404, a flow tube, 501, a second capsule cavity, 502, a third flow tube, 503, and a second capsule with a sealed cavity.
Detailed Description
The present invention is described in further detail below with reference to the attached drawings so that those skilled in the art can practice the invention with reference to the description.
In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 6, the ground stress testing device of the present invention is applied to water gushing at a borehole opening, and comprises: the device comprises a slider 1, a converter 2, an upper packer 3, a test tube 4 and a lower packer 5 which are sequentially communicated from top to bottom; the devices are detachably connected through bolts, and a first water flow pipeline and a second water flow pipeline are arranged, the first water flow pipeline is communicated with the axial center positions of the converter 2, the upper packer 3, the testing pipe 4 and the lower packer 5 and is used for injecting water into the testing pipe 4 and pressurizing after the upper packer 3 and the lower packer 5 are sealed, a hydraulic fracturing test is carried out in the testing pipe 4, the second water flow pipeline 201 is sequentially communicated with the upper packer 3 and the lower packer 5 and is used for forming a hydraulic environment for constant-pressure sealing outside the testing pipe 4, during the test, real-time hydraulic monitoring is carried out on the testing pipe 4, the hydraulic pressure change in the testing pipe 4 is recorded, and real-time data reference is provided for actual rock mass construction by using a hydraulic fracturing method;
one end of the slider, which is far away from the converter 2, is connected through a drill rod, the slider is detachably connected with the drill rod, and the drill rod is a hollow drill rod with a water injection function; the drill rod is used for injecting water into the slider, and the drill rod is used for lowering the testing equipment into the drill hole through connecting the slider to carry out the ground stress test.
During the setting, earlier carry out the debugging and the installation of equipment at the earth's surface, mainly carry out the constant voltage test, guaranteeing the leakproofness of equipment, can not take place to leak under 15 MPa's pressure, then carry out drilling with test equipment and transfer to fracturing pre-selection section, through the drilling rod to the inside water injection of test equipment, and then carry out the hydrofracturing method experiment, the in-process of water injection need carry out whole control hydraulic pressure change to prevent that water injection pressure from surpassing ground stress test equipment's internal pressure.
As shown in fig. 2, in another aspect, the slider includes: a sliding tube 101, both ends of the sliding tube 101 being free open ends, the sliding tube 101 including: a first limiting part 103 which is arranged on the inner side wall of the sliding tube 101 in a protruding manner and is positioned at one free opening end; a second position-limiting part 104, which is protrudingly arranged on the inner side wall of the sliding tube 101 at a position far away from the first position-limiting part 103; a first water flow pipe section 108 which is a section between the first limiting part 103 and the second limiting part 104 in the sliding pipe 101; a second water flow pipe segment 109, which is a segment of the sliding pipe 101 located outside the second limiting portion, and the second water flow pipe segment 109 is communicated with a second water flow pipe 201 and a third water flow pipe 202 at the axial center position of the converter 2;
the first limiting part 103 and the second limiting part 104 are both annular and are attached to the inner wall of the sliding tube 101;
one end of the connecting pipe 102 is a sealed end, and the other end of the connecting pipe 102 is an open end, and the open end of the connecting pipe 102 extends out of the sliding pipe 101 and is connected with the drill rod; the connection pipe 102 includes: a first drain hole 105 formed through the opposite side walls of the slide pipe 101;
a first water flow pipe 107, one end of the first water flow pipe 107 is communicated with the first water flow pipe section 108, and the other end is communicated with the second water flow pipe section 109;
a limiting ring 106, which is sleeved on the connecting pipe 102, and the first limiting part 103 and the second limiting part 104 limit the limiting ring therein;
when the limiting ring 106 contacts with the first limiting part 103 and limits the position, the first drainage hole 105 is correspondingly communicated with the first water flow pipe 107, and when the limiting ring 106 contacts with the second limiting part 104 and limits the position, the first drainage hole 105 is correspondingly communicated with the second water flow pipe 109.
In the above technical solution, the connection pipe 102 is used for connecting with a drill rod, leading in external clean water, and being limited between the first limiting part 103 and the second limiting part 104 by the limiting ring 106, the clean water flows out from the first drain hole 105 of the connection pipe 102, when a ground stress test device normally extends into a vertical drill hole, due to the deadweight of the ground stress test, the first drain hole 105 of the connection pipe 102 is communicated with the first water flow pipe 107 of the first water flow pipe section 108, and the clean water directly flows into the converter 2, the upper packer 3, the test pipe 4 and the lower packer 5 from the first water flow pipe 107; when the ground stress test tube 4 extends into the hole opening of the borehole with water burst, the pressure of the underground water burst is greater than that of the ground stress test equipment, so that the sliding tube 101 moves towards the upper packer 3 along the connecting tube 102, and when the limit ring 106 just interferes with the second limit part 104, the position of the first water drain hole 105 is located in the second water flow pipe section 109, at this time, as the first water drain hole 105 is separated from the inlet of the first water flow pipe 107 to the second water flow pipe section 109, the flow pipeline of the clean water is switched to the second water flow pipe 201 and the third water flow pipe 202 which are communicated with the second water flow pipe 201.
As shown in fig. 3, in another technical solution, the converter 2 includes: a solid section and a channel section, the channel section being disposed along a length direction of an interior of the solid section for forming a water flow channel, the channel section comprising: a second water flow pipe 201, one end of the second water flow pipe 201 is communicated with the first water flow pipe 107, and the other end is communicated with the upper packer 3; a third flow pipe 202 located in the middle of the solid section, one end of the third flow pipe 202 being in communication with the second flow pipe section 109 of the sliding pipe 101, and one end of the third flow pipe 202 remote from the second flow pipe section 109 being in communication with the upper packer 3; a fourth water flow tube 203 comprising: a first branch pipe 204, one end of which is communicated with the third water flow pipe 202, and one end of the first branch pipe 204 far away from the third water flow pipe 202 is communicated with the upper packer 3; a second branch pipe 205 and a third branch pipe 207, wherein one end of the second branch pipe 205 is communicated with the first branch pipe 204, one end of the second branch pipe 205 far away from the first branch pipe 204 is communicated with the third branch pipe 207, and one end of the third branch pipe 207 far away from the second branch pipe 205 is communicated with the third water flow pipe 202;
a first one-way valve provided on the third water flow pipe 202;
a second one-way valve disposed on the first branch pipe 204;
a third check valve provided on the third branch pipe 207;
a pressure valve 208 provided on the second branch pipe 205;
a hydraulic valve 209 communicating the connection ends of the second branch pipe 205 and the third branch pipe 207;
and an electromagnetic switch 206, which is communicated with the second branch pipe 205 and the third branch pipe 207, and is used for controlling the flow path of the second branch pipe 205 or the third branch pipe 207.
In the above technical scheme, the converter 2 is connected with the slider by a connecting bolt, and after the ground stress test equipment is lowered to the primary pre-selection section of fracturing, under the action of self weight of the equipment, the second water flow pipe section 109 of the sliding pipe 101 is communicated with the second water flow pipe 201 and the third water flow pipe 202, and water is injected into the upper packer 3 through the second water flow pipe 201 to form a closed space. When the ground stress fracturing test of vertical and inclined water burst drill holes is carried out, the ground stress test equipment is subjected to the impact force of the pressure-bearing water in the drill holes, the impact force is larger than the self weight of the equipment, and when the ground stress fracturing test of horizontal water burst drill holes and small-inclination-angle horizontal water burst drill holes is carried out and is subjected to the friction force of the drill hole walls and the impact force of the pressure-bearing water, the high-pressure water flow in the path of the second water flow pipe 201 is communicated with the third water flow pipe 202 and the fourth water flow pipe 203. The water flow in the second flow pipe 201 flows first from the first branch 204 of the fourth flow pipe 203 through the second one-way valve to the upper packer 3 and the lower packer 5. When the pressure in the upper packer 3 and the lower packer 5 reaches 5MPa, the pressure valve 208 is in an open state, the water in the second water flow pipe 201 sequentially flows to the electromagnetic change-over switch 206 and the hydraulic valve 209 through the first branch pipe 204 and the second branch pipe 205 and the pressure valve 208 of 5MPa, the electromagnetic change-over switch 206 changes the internal pipeline, and the water flows into the third water flow pipe 202 through the third branch pipe 207 of the water flow pipe, and then enters the first flow guide pipe 302 of the first packing capsule 303.
In another solution, as shown in fig. 4, the upper packer 3 comprises:
a first packing capsule 303, one end of which is connected with the converter 2, and one end of the first packing capsule 303 far away from the converter 2 is communicated with the test tube 4; the first packing capsule 303 includes: a first capsule cavity 301, wherein the first capsule cavity 301 is communicated with the second water flow pipe 201 and the first branch pipe 204; a first flow guide pipe 302 located at the central axis of the first capsule cavity 301, wherein one end of the first flow guide pipe 302 is communicated with the third water flow pipe 202, and one end of the first flow guide pipe 302 far away from the third water flow pipe 202 is communicated with the test tube 4.
In the above technical solution, the first separation chamber is communicated with the second water flow pipe 201 and the third branch pipe 207, the first flow guide pipe 302 is communicated with the third flow guide pipe 502, and the first flow guide pipe 302 and the first separation chamber form an independent pipe space.
As shown in fig. 5, in another technical solution, the test tube 4 comprises; the side wall of the body 401 is provided with at least one pair of second drainage holes 403 in a penetrating manner; a pair of draft tubes 404, one end of the pair of draft tubes 404 is communicated with the upper packer 3, and one end of the pair of draft tubes 404 far away from the upper packer 3 is communicated with the lower packer 5; and a second flow pipe 402, one end of which is communicated with the first flow pipe 302 of the upper packer 3, and one end of the second flow pipe 402, which is far away from the first flow pipe 302, is communicated with the lower packer 5.
In the above technical solution, the test tube 4 is communicated with the upper packer 3 and the lower packer 5, wherein the second guide tube 402 is communicated with the first guide tube 302 of the upper packer 3, clean water in the first guide tube 302 is input into the second guide tube 402 to form a fracturing environment, and finally, when the pressure exceeds the internal bearing capacity of the second guide tube 402, the clean water enters the body and is ejected from the second drain hole 403.
In another solution, as shown in fig. 6, the lower packer 5 comprises:
a second packing capsule 503, one end of which is connected with the test tube 4, and one end of the second packing capsule 503, far away from the test tube 4, is sealed; the second packing capsule 503 includes: a second capsule cavity 501, the second capsule cavity 501 being in communication with a pair of the draft tubes 404;
a third flow guide tube 502, which is communicated with the second flow guide tube 402 of the test tube 4.
In another embodiment, the threshold of the pressure valve 208 is 5 MPa.
In another technical scheme, the slider, the converter 2, the upper packer 3, the test tube 4 and the lower packer 5 are detachably connected through bolts.
A test method of a ground stress test device applied to water burst of a drill hole orifice is characterized by comprising the following steps:
step S1, installing and debugging equipment;
installing and debugging the ground stress test equipment on the ground, and testing the sealing performance and the liquidity of the ground stress test equipment;
step S2, lowering the equipment to the experiment position and carrying out the test of the hydraulic fracturing method;
lowering the ground stress testing equipment which is installed and debugged to an orifice of a drill hole to form hydraulic seal inside the ground stress testing equipment, and then lowering the ground stress testing equipment into the drill hole to perform a hydraulic fracturing method test;
step S3, recording test data;
and recording the test process of the ground stress test equipment in the hydrofracturing method.
Preferably, the step S1 further includes:
and setting a threshold value when testing the tightness of the ground stress testing equipment, and carrying out pressure test on the ground stress testing equipment to ensure that the ground stress testing equipment cannot leak water when the pressure is within 15 MPa.
Under the impact action of the pressure water in the drill hole and the friction action of the drill hole wall, the first drain hole 105 positioned on the side wall of the connecting pipe 102 of the sliding pipe 101 is communicated with the second water flow pipe 201, and the high-pressure water flow in the second water flow pipe 201 is communicated with the second water flow pipe 201, the third water flow pipe 202 and the third water flow pipe 202. The water flow in the second flow line 201 first flows from the first branch 204 through the second non return valve to the upper packer 3 and the lower packer 5. When the pressure in the upper packer 3 and the lower packer 5 reaches 5MPa, the pressure valve 208 is in an open state, the water in the second water flow pipe 201 flows to the electromagnetic change-over switch 206 and the hydraulic valve 209 in sequence through the first branch pipe 204 and the second branch pipe 205 and the pressure valve 208 of 5MPa, the electromagnetic change-over switch 206 changes the internal pipe, the water flows to the third water flow pipe 202 through the third branch pipe 207, and then enters the upper packer 3 and the test pipe 4, and the fracturing test is completed.
And the upper packer 3 and the lower packer 5 swell, are tightly attached to the wall of a drill hole, and the drill rod is slowly lowered on the earth surface at the moment, and when the drill rod keeps the original position still, a closed space is formed between the upper packer and the lower packer, and then high-pressure clear water injection on the earth surface is carried out to carry out fracturing test.
And (4) according to the testing time of the fracturing testing section, performing high-pressure water flow switch conversion on an operation table on the ground surface, and recording the testing result in the whole testing process by adopting a computer.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (6)
1. An earth stress testing device applied to water gushing at a drill hole orifice, characterized by comprising:
the sliding device, the converter, the upper packer, the test tube and the lower packer are sequentially communicated from top to bottom;
the first water flow pipeline is communicated with the axial center positions of the converter, the upper packer, the test tube and the lower packer in sequence;
at least one pair of second water flow pipes which are communicated with the converter, the upper packer, the test tube and the lower packer in sequence and are positioned on the opposite sides of the first water flow pipe;
one end of the slider, which is far away from the converter, is connected through a drill rod, the drill rod is used for injecting water into the slider, and the drill rod is used for lowering the test equipment into a drill hole through connecting the slider to carry out an earth stress test; the slider includes:
the both ends of slip pipe are free open end, the slip pipe includes:
a first limiting part; the inner side wall of the sliding pipe is arranged in a protruding mode and is positioned at one free opening end position;
a second limiting part; the first limiting part is arranged on the inner side wall of the sliding pipe in a protruding mode;
a first flow pipe section which is a section between the first limit part and the second limit part in the sliding pipe;
the second water flow pipe section is a section of the sliding pipe, which is positioned outside the second limiting part;
one end of the first water flow pipe is communicated with the first water flow pipe section, and the other end of the first water flow pipe is communicated with the second water flow pipe section;
the first limiting part and the second limiting part are both annular and are attached to the inner wall of the sliding pipe;
one end of the connecting pipe is a sealing end, the other end of the connecting pipe is an opening end, and the opening end of the connecting pipe extends out of the sliding pipe and is connected with the drill rod; the connection pipe includes:
the first drainage hole penetrates through the opposite side walls of the sliding pipe;
the limiting ring is sleeved on the connecting pipe, and the first limiting part and the second limiting part limit the limiting ring;
when the limiting ring is in contact with the first limiting part and limits the position, the first water drainage hole is correspondingly communicated with the first water flow pipe, and when the limiting ring is in contact with the second limiting part and limits the position, the first water drainage hole is correspondingly communicated with the second water flow pipe;
the converter includes: a solid section and a channel section, the channel section being disposed along a length direction of an interior of the solid section for forming a water flow channel, the channel section comprising:
one end of the second water flow pipe is communicated with the first water flow pipe, and the other end of the second water flow pipe is communicated with the upper packer;
a third water flow pipe, which is positioned in the middle of the solid body section, wherein one end of the third water flow pipe is communicated with the second water flow pipe section of the sliding pipe, and one end of the third water flow pipe, which is far away from the second water flow pipe section, is communicated with the upper packer;
a fourth water flow tube comprising:
a first branch pipe, one end of which is communicated with the third water flow pipe, and one end of the first branch pipe, which is far away from the third water flow pipe, is communicated with the upper packer;
the water flow pipe comprises a first branch pipe and a second branch pipe, wherein one end of the first branch pipe is communicated with the water flow pipe;
the first one-way valve is arranged on the third water flow pipe;
the second one-way valve is arranged on the first branch pipe;
the third one-way valve is arranged on the third branch pipe;
the pressure valve is arranged on the second branch pipe;
the hydraulic valve is communicated with the connecting end part of the second branch pipe and the third branch pipe;
and the electromagnetic change-over switch is communicated with the second branch pipe and the third branch pipe and is used for controlling the flow path of the second branch pipe or the third branch pipe.
2. The device of claim 1, wherein the upper packer comprises:
one end of the first packing capsule is connected with the converter, and one end of the first packing capsule, which is far away from the converter, is communicated with the test tube; the first containment capsule comprises:
a first capsule cavity in communication with the second water flow tube and a first branch tube;
and the first flow guide pipe is positioned at the middle axle center of the first capsule cavity, one end of the first flow guide pipe is communicated with the third water flow pipe, and one end of the first flow guide pipe, which is far away from the third water flow pipe, is communicated with the test pipe.
3. The device for testing the crustal stress applied to water gushing of a borehole orifice according to claim 2, wherein the test tube comprises;
the side wall of the body is provided with at least one pair of second drainage holes in a penetrating manner;
one ends of the pair of draft tubes are communicated with the upper packer, and the ends of the pair of draft tubes, which are far away from the upper packer, are communicated with the lower packer;
and one end of the second flow guide pipe is communicated with the first flow guide pipe of the upper packer, and one end, far away from the first flow guide pipe, of the second flow guide pipe is communicated with the lower packer.
4. The device of claim 3, wherein the lower packer comprises:
one end of the second packing capsule is connected with the test tube, and one end of the second packing capsule, which is far away from the test tube, is sealed; the second containment capsule comprises:
a second capsule chamber in communication with the pair of draft tubes;
and the third flow guide pipe is communicated with the second flow guide pipe of the test pipe.
5. The device for testing the crustal stress applied to water gushing of the drill hole orifice according to claim 4, wherein the threshold value of the pressure valve is 5 MPa.
6. The device for testing the crustal stress applied to water gushing of a drilling orifice of claim 5, wherein the slider, the converter, the upper packer, the test tube and the lower packer are detachably connected through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110764236.2A CN113309508B (en) | 2021-07-06 | 2021-07-06 | Ground stress testing equipment and testing method applied to water burst of drill hole opening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110764236.2A CN113309508B (en) | 2021-07-06 | 2021-07-06 | Ground stress testing equipment and testing method applied to water burst of drill hole opening |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113309508A CN113309508A (en) | 2021-08-27 |
| CN113309508B true CN113309508B (en) | 2022-04-01 |
Family
ID=77381802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110764236.2A Active CN113309508B (en) | 2021-07-06 | 2021-07-06 | Ground stress testing equipment and testing method applied to water burst of drill hole opening |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113309508B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016108804A (en) * | 2014-12-05 | 2016-06-20 | 応用地質株式会社 | Hydraulic fracture testing device |
| CN106761556A (en) * | 2016-12-01 | 2017-05-31 | 孙东生 | A kind of water route change-over switch and packer control device |
| CN107191165A (en) * | 2017-04-19 | 2017-09-22 | 中煤科工集团西安研究院有限公司 | Both-end blocks water filling device in hole |
| CN111502589A (en) * | 2020-04-23 | 2020-08-07 | 中国地质科学院地质力学研究所 | Packer for measuring ground stress by hydraulic fracturing method |
| CN112432857A (en) * | 2020-10-30 | 2021-03-02 | 中国电建集团北京勘测设计研究院有限公司 | Hydrofracturing method ground stress test device with pressurization pressure release control switch |
| CN113027417A (en) * | 2021-03-04 | 2021-06-25 | 长江水利委员会长江科学院 | Water-retaining pressure-relieving device and method suitable for ground stress test of deep water level drill hole |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK3688271T3 (en) * | 2017-09-29 | 2022-03-07 | Schlumberger Technology Bv | Stress testing with inflatable packer assembly |
-
2021
- 2021-07-06 CN CN202110764236.2A patent/CN113309508B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016108804A (en) * | 2014-12-05 | 2016-06-20 | 応用地質株式会社 | Hydraulic fracture testing device |
| CN106761556A (en) * | 2016-12-01 | 2017-05-31 | 孙东生 | A kind of water route change-over switch and packer control device |
| CN107191165A (en) * | 2017-04-19 | 2017-09-22 | 中煤科工集团西安研究院有限公司 | Both-end blocks water filling device in hole |
| CN111502589A (en) * | 2020-04-23 | 2020-08-07 | 中国地质科学院地质力学研究所 | Packer for measuring ground stress by hydraulic fracturing method |
| CN112432857A (en) * | 2020-10-30 | 2021-03-02 | 中国电建集团北京勘测设计研究院有限公司 | Hydrofracturing method ground stress test device with pressurization pressure release control switch |
| CN113027417A (en) * | 2021-03-04 | 2021-06-25 | 长江水利委员会长江科学院 | Water-retaining pressure-relieving device and method suitable for ground stress test of deep water level drill hole |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113309508A (en) | 2021-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109469479B (en) | Hydraulic fracturing ground stress measurement system and method | |
| JP3093130B2 (en) | Packer-type groundwater sampling device and sampling method | |
| US2742968A (en) | Self-inflating balloon type formation tester | |
| US11274543B2 (en) | Method for accurately measuring reopening pressure of hydraulic fracturing induced fracture in deep borehole | |
| CN103953331A (en) | Self-drilling type in-situ measuring device of coal seam gas pressure | |
| CN109915039B (en) | Oil and gas well reservoir protection completion pipe string, installation method and upper pipe string replacement method | |
| CN110243746A (en) | A kind of device and method of layer-through drilling quick in situ test coal seam permeability | |
| CN112432857A (en) | Hydrofracturing method ground stress test device with pressurization pressure release control switch | |
| CN105649548A (en) | Bypass nipple joint, downhole drilling tool, and seepage plugging method or jam releasing method of downhole drilling tool | |
| CN113309508B (en) | Ground stress testing equipment and testing method applied to water burst of drill hole opening | |
| CN112943157B (en) | Ball-throwing type leaking stoppage bypass valve for well drilling | |
| CN109854202A (en) | A kind of two-tube squash type layering water-stop | |
| CN107956430B (en) | Intelligent well completion pipe string suitable for land test well and well logging test method thereof | |
| CN204212753U (en) | Upper strata layered polymer injection lower floor commingled water injection process pipe string | |
| CN111749634A (en) | Gas-liquid double-pressure constant-pressure compensation device | |
| CN203594370U (en) | Instrument built-in type testing tubing string | |
| CN107448177B (en) | Oil well liquid production profile testing pipe column and testing method thereof | |
| CN114856515B (en) | Water injection well pipe column and control method thereof | |
| CN202659231U (en) | Pressure maintaining device for underground sampling device | |
| CN212454336U (en) | Gas-liquid double-pressure constant-pressure compensation device | |
| CN112253247B (en) | Gas pressure rapid measuring device and measuring method | |
| CN201810272U (en) | Ultrahigh-pressure normally open valve for acidification and liquid drainage | |
| CN208415225U (en) | Packer permeability test equipment | |
| CN210798950U (en) | Multi-parameter online monitoring device for deep well casing external annular thin guide pipe | |
| CN204126618U (en) | The general Zhu Ju lower floor in upper strata commingled water injection process pipe string |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |