CN109162695B - Deep hole pressurized water test device - Google Patents
Deep hole pressurized water test device Download PDFInfo
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- CN109162695B CN109162695B CN201811025529.3A CN201811025529A CN109162695B CN 109162695 B CN109162695 B CN 109162695B CN 201811025529 A CN201811025529 A CN 201811025529A CN 109162695 B CN109162695 B CN 109162695B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 185
- 238000012360 testing method Methods 0.000 title claims abstract description 96
- 239000002775 capsule Substances 0.000 claims abstract description 63
- 238000005553 drilling Methods 0.000 claims abstract description 47
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 22
- 208000005189 Embolism Diseases 0.000 claims description 36
- 230000003073 embolic effect Effects 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 54
- 238000011835 investigation Methods 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 21
- 238000010998 test method Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 6
- 230000006837 decompression Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005086 pumping Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 241000842962 Apoda limacodes Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 231100000817 safety factor Toxicity 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
Abstract
The invention relates to a drilling pressurized water test in engineering geological investigation, in particular to a deep hole pressurized water test device. The test device comprises a reducer union, a piston assembly, a one-way valve assembly and a plug capsule body, wherein two independent water flow channels which can be opened or closed in time and converted in time can be used for realizing the procedure of pressing water to inflate the plug capsule in advance, then the function of the one-way valve in time can be realized through simple operation, the water channel of the pressed water to inflate the capsule is sealed, a high-pressure sealing area is formed for guaranteeing and keeping the sealing performance of the plug, and meanwhile, the water flow channel path is changed to a water outlet of a test section, so that the procedure of the pressed water test can be continuously implemented. Therefore, another set of high-pressure water filling pump and a high-pressure water supply pipeline with full hole length, which are specially equipped and used for the pressurized water inflation plug in the existing method, can be omitted. Reduce the equipment configuration and cost and simplify the operation.
Description
Technical Field
The invention relates to a drilling pressurized water test in engineering geological investigation, in particular to a deep hole pressurized water test device.
Background
The borehole water pressure test is an important working content for acquiring the hydrogeological data of the rock stratum in engineering geological investigation.
The water pressure test procedure requires "a section of water pressure test is generally conducted every 5 meters of hole depth; preferably, a hydraulic or pneumatic plug is used. When the engineering geological survey production unit selects a drilling pressurized water test technical scheme, according to the type of a tester embolism and the applicable conditions, a mechanical top pressure type embolism method is generally adopted for shallow holes, and a hydraulic or pneumatic type embolism method is adopted for deep holes; because the pneumatic embolism method is adopted, a set of high-pressure inflator pump or a high-pressure air tank is additionally arranged as an air supply source, the pneumatic embolism method is basically seldom selected from the consideration of the configuration of test equipment and site safety factors as far as possible, and most of the most widely used technical schemes of the hydraulic embolism method at present. Engineering geological exploration deep hole drilling techniques can be divided into two main categories by drilling tool: conventional drill drilling methods, rope drill drilling methods. The drilling water pressure test technical scheme of the two drilling methods adopts the following two types according to the plug type:
(1) The hydraulic single plug method, which is to drill a test section from top to bottom to reach the length of the test section, comprises the steps of putting the hydraulic single plug into the test section, carrying out a water pressure test, then putting out a single plug tester, drilling the next test section to reach the depth of the test section, and circulating until the test section is full.
(2) The hydraulic double-plug method is that after the whole hole is drilled, the hydraulic double-plug is put in, and according to the required length of each test section, the hydraulic test of the whole hole is continuously implemented section by section along the whole hole depth.
The single-plug method and the double-plug method both adopt a method that water is supplied by a single high-pressure pipeline with full hole length, the single-pressure pipeline and the double-pressure pipeline are inflated by a pressurized water inflation plug (single or double) capsule to play a role of sealing a test section, then the high-pressure water channel is closed and sealed, and then water is supplied to the pressurized water test hole section by a full Kong Zuangan column (pressurized water pipe) water flow channel to carry out a pressurized water test.
The hydraulic rubber packer single plug and double plugs are provided with complete matched shaping products at present in China, the pressure resistance of the tester plug can generally reach 10 Mpa-30 Mpa pressure value, and the production unit is selected according to the required aperture specification and pressure value index, purchased and provided for use. However, the hydraulic single-plug and double-plug water-pressure test adopted by these drilling processes, although widely used and mature and reliable, still has the following problems in implementation and application:
(1) A set of separate facilities are needed: a high-pressure water filling pump and a high-pressure water supply pipeline with full hole depth (generally a pressure-resistant soft rubber pipe or a steel braided hose with a water through hole of about phi 6mm in inner diameter);
(2) When the test section formal pressurized water test procedure is carried out, in order to ensure that the performance of the plug sealing and isolating test section is reliable, the range from the high-pressure hose with the whole full-hole length to the inner cavity of the plug capsule is in a high-pressure area, the pressurized water test procedure is always kept in a sealing state, if the high-pressure area is depressurized due to the fact that a pipeline is damaged or a joint leaks, the sealing performance of the plug is affected, the pressurization operation is required to be supplemented for many times, even the sealing performance is insufficient, the test is possibly affected, the pressure relief reason and the position are required to be checked, and then repair or replacement treatment is carried out. (3) After the water pressure test of each section is finished, as the single or double embolism capsules are decompressed and restored to original state after being inflated by high-pressure water, a valve is opened from the ground to enable the water to slowly flow out along a high-pressure hose with full hole depth under the action of pressure difference, the decompression process is time-consuming, especially under the deep hole condition, the time for waiting for decompression is too long, and the conditions of abnormal water level pressure difference in holes or irregular influence of special hole walls of stratum sometimes occur, so that the embolism capsules are not easy to completely decompress and restore to original state, and the embolism of a tester is difficult to be smoothly pulled up;
(4) When each section of the water pressure tester is put into, in order to prevent the phenomenon of uneven speed reduction and winding of the full-hole-depth plug water pressure soft rubber pipe and the drill rod (water pressure pipe), the water pressure soft rubber pipe and the drill rod need to be carefully bundled and fixed every several meters, and each part needs to be bundled and split when the tester is taken out, so that the operation process of the tester is complicated and time-consuming.
Disclosure of Invention
In order to solve the problems, the invention provides a deep hole water pressure test device. The device can simultaneously meet the requirements of selecting a deep hole pressurized water test technical scheme adopting a conventional drilling tool or a rope drilling tool and adopting a hydraulic single plug or a hydraulic double plug, can be respectively suitable for various conditions, and meets the requirement of multiple purposes; the device can omit a single high-pressure pipeline required by the hydraulic expansion embolism in the prior art, achieves the effects of reducing configuration, reducing cost and simplifying operation, has the function of improving and maintaining the tightness of a high-pressure area after the embolism capsule is expanded, and has the effect of ensuring the quick and reliable decompression process of the embolism capsule after the end of a pressurized water test, thereby meeting the requirement of multiple functions.
The technical scheme adopted by the invention is as follows: the utility model provides a deep hole pressurized-water test device, includes reducing joint, piston assembly, check valve subassembly and the embolism capsule body of being connected with the drilling tool, its characterized in that: the piston assembly comprises a piston seat sleeve and a piston body sleeved in the piston seat sleeve, and the upper end of the piston body extends out of the piston seat sleeve and is fixedly connected with the reducer union; the piston body is provided with a piston body center hole and a piston body eccentric hole in parallel along the axis direction, and the piston body center hole is arranged on the piston body center axis; the upper end of the eccentric hole of the piston body is communicated with the through-flow channel of the reducer union, and the lower end of the eccentric hole of the piston body is communicated with the capsule cavity of the embolic capsule body through the one-way valve assembly to form a first channel;
the piston body center hole upper end and the through-flow channel intercommunication of reducing joint, be equipped with the core pipe in the piston body center hole, be equipped with two sets of piston body inner ring sealing washer groups that are used for sealedly between core pipe outer wall upper portion and the piston body center hole pore wall, two sets of be equipped with the core pipe wall between the piston body inner ring sealing washer group to leading to the apopore, the piston body center hole passes through the core pipe wall to leading to the apopore and core inner chamber hole intercommunication, the core pipe lower extreme passes check valve subassembly and embolism tester core pipe intercommunication, the embolism tester core pipe lower extreme passes capsule inner chamber and test section festoon pipe delivery port intercommunication, forms the second passageway.
Preferably, the check valve assembly comprises a check valve seat arranged at a water outlet of an eccentric hole of the piston body, a check valve matched with the check valve seat, a check valve spring and a check valve spring seat body, wherein the upper end of the check valve spring seat body is fixedly connected with the lower end of the piston seat sleeve through threads, the middle part of the check valve spring seat body is provided with a valve seat eccentric hole, a valve rod of the check valve is arranged in the valve seat eccentric hole, the upper end of the check valve spring is abutted against a valve cover at the upper end of the check valve, and the lower end of the check valve spring is abutted against the check valve spring seat body; the one-way valve cover is separated from the one-way valve seat, and the eccentric hole of the piston body is communicated with the eccentric hole of the valve seat; the check valve cover is attached to the check valve seat, and the eccentric hole of the piston body is eccentric Kong Jieduan with the valve seat.
Furthermore, a one-way valve water outlet port at the lower end of the eccentric hole of the valve seat is communicated with the inner cavity of the capsule through a short high-pressure pipe.
Furthermore, the lower end of the one-way valve spring seat body is fixedly connected with the upper end of the connecting sleeve through threads, the lower end of the connecting sleeve is fixedly connected with the connecting sleeve on the embolism tester through threads, and the embolism capsule body is fixedly connected with the connecting sleeve on the embolism tester; the high-pressure short pipe is arranged in the connecting sleeve and is communicated with the water inlet interface of the inner cavity of the capsule.
Preferably, the central hole of the piston body is a stepped hole, and the upper aperture is larger than the lower aperture; the upper part of the core tube and the small hole at the lower part of the piston body center hole form a seal through two groups of piston body inner ring sealing ring groups, the drilling tool drives the piston body to move downwards relative to the piston seat sleeve through the reducer union, the drilling tool descends to the position that the core tube wall corresponds to the large hole at the upper part of the piston body center hole, and the piston body center hole is communicated with the inner cavity hole of the core tube through the core tube wall.
Preferably, a core pipe water outlet port at the lower end of the core pipe is communicated with a water inlet port at the upper end of the core pipe of the embolism tester.
Preferably, a check valve spring seat core pipe sealing ring group is arranged between the check valve spring seat body and the outer wall of the core pipe.
Preferably, a positioning rod is arranged between the one-way valve spring seat body and the piston body.
The beneficial effects obtained by the invention are as follows:
1. the invention only needs to use the same set of high-pressure pump and water supply pipeline equipped by the existing drilling technology, two independent water flow channels which can be opened or closed in time and are converted in time are adopted by the novel pressurized water test device, the pressurized water inflation plug capsule procedure process can be implemented in advance, then the function of a timely one-way valve can be realized through simple operation, the pressurized water inflation capsule water channel is closed, a high-pressure closed area is formed to ensure and maintain the plug sealing performance, meanwhile, the water flow channel path is changed to the water outlet of the test section, and the pressurized water test procedure process can be continuously implemented. Therefore, another set of high-pressure water filling pump and a high-pressure water supply pipeline with full hole length, which are specially equipped and used for the pressurized water inflation plug in the existing method, can be omitted. Reduce the equipment configuration and cost and simplify the operation.
2. The applicability is wide: the invention can simultaneously meet the requirements of the drilling water pressure test technical scheme of the hydraulic single plug or the hydraulic double plug adopted in the conventional drilling tool or rope drilling tool drilling process, and can be directly applied to various conditions.
3. The functions are as follows: in the existing method, the execution of the pressurized water test time period is to maintain the performance of the plug sealing test section, and the high-pressure sealing state is required to be maintained from the high-pressure hose with the whole full-hole length to the capsule inner cavity range area; and after the test is finished, the water flow in the inner cavity of the capsule is decompressed, the high-pressure hose with a small inner diameter hole with full hole depth is required to slowly flow out, and the decompression process is time-consuming and the effect is limited by external conditions. When the design principle and the structure of the novel pressurized water test device are improved into a test section pressurized water test time period, a high-pressure area is formed between the compressed one-way valve cover in the test device and the inner cavity of the embolism capsule, so that the range of the high-pressure area is greatly reduced, the timely one-way valve function is formed through operation, the reverse leakage of the time period is avoided, and the function of improving and guaranteeing the tightness of the high-pressure area of the embolism is achieved; after the test is finished, the operation action is performed to release the function of the timely one-way valve, and then high-pressure water in the inner cavity of the capsule flows back to the large-inner diameter hole water flow channel of the drill string at a high speed under the pressure difference, so that the rapid and reliable pressure release function is realized.
4. The invention can reduce the configuration of field device equipment and simplify the operation links of the lifting tester under the shallow hole condition; the inconvenience and limitation of the hole depth caused by the fact that the full-hole high-pressure soft rubber pipe is put in can be avoided under the deep hole condition; different bore diameters are applicable. The adaptability to the drilling depth and the overall applicability are obviously improved compared with the prior art.
Drawings
FIG. 1 is a schematic view of a first channel of the present invention when connected;
FIG. 2 is an enlarged view of FIG. 1 at a;
FIG. 3 is a schematic diagram of the structure when the second channels are communicated;
fig. 4 is an enlarged view at b in fig. 3.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
As shown in fig. 1-2, the deep hole water pressure test device comprises a reducer union 1, a piston assembly, a one-way valve assembly and a plug capsule body 8 which are arranged from top to bottom, wherein the reducer union 1 is connected with drilling tools, the drilling tools with different types select corresponding reducer union 1, the piston assembly comprises a piston seat sleeve 21 and a piston body 22 sleeved in the piston seat sleeve 21, the upper end of the piston body 22 extends out of the piston seat sleeve 21 and is fixedly connected with the lower end of the reducer union 1, the piston body 22 is provided with a piston body center hole 27 and a piston body eccentric hole 23 along the axial direction, the piston body center hole 27 and the piston body eccentric hole 23 are mutually parallel and eccentrically arranged, the piston body center hole 27 is arranged on the axial line of the piston body 22, the upper end of the piston body eccentric hole 23 is communicated with an overflow channel 11 of the reducer union 1, and the lower end of the piston body eccentric hole 23 is communicated with a capsule cavity 81 of the plug capsule body 8 through the one-way valve assembly; the water flow flows into the eccentric hole 23 of the piston body from the upper end of the flow passage 11 of the reducer union 1, and when the one-way valve assembly is conducted, the water flow enters the inner cavity 81 of the capsule after passing through the one-way valve assembly, so as to form a first passage (A passage in the figure).
As shown in fig. 3-4, the upper end of the piston body center hole 27 is communicated with the through-flow channel 11 of the reducer union 1, the core tube 4 is arranged in the piston body center hole 27, in this embodiment, the piston body center hole 27 is a stepped hole, the upper aperture is larger than the lower aperture, in the initial state, the upper portion of the core tube 4 and the lower aperture of the piston body center hole 27 form a seal through two groups of piston body inner ring seal ring groups 26, a core tube wall water through hole 24 is arranged between the two groups of piston body inner ring seal ring groups 26, the drilling tool drives the piston body 22 to move downwards relative to the piston seat sleeve 21 through the reducer union 1, the drilling tool descends to the position that the core tube wall water through hole 24 corresponds to the upper aperture of the piston body center hole 27, the piston body center hole 27 is communicated with the inner cavity hole of the core tube through the core tube wall water through hole 24, and at this time, the one-way valve component is in a closed state (the first channel is closed). The lower end of the core tube 4 passes through the one-way valve assembly to be communicated with the plug tester core tube 7, and the lower end of the plug tester core tube 7 passes through the capsule cavity 81 to be communicated with the water outlet of the test section flower tube; the water flow flows into the piston body center hole 27 from the upper end of the through-flow channel 11 of the reducer union 1, enters the inner cavity hole of the core tube through the core tube wall and the water through hole 24, and then flows into the core tube 7 of the embolism tester to form a second channel (a channel B in the figure).
In the embodiment, the check valve assembly comprises a check valve seat 31, a check valve 32, a check valve spring 33 and a check valve spring seat body 34, wherein the check valve seat 31 is arranged at a water outlet of a piston body eccentric hole 23, the upper end of the check valve spring seat body 34 is fixedly connected with the lower end of a piston seat sleeve 21 through threads, the lower end of the check valve spring seat body 34 is fixedly connected with the upper end of a connecting sleeve 6 through threads, the lower end of the connecting sleeve 6 is fixedly connected with a connecting sleeve 82 on a plug tester through threads, and a plug capsule body 8 is fixedly connected with the connecting sleeve 82 on the plug tester; the middle part of the one-way valve spring seat body 34 is provided with a valve seat eccentric hole 35, the high-pressure short pipe 5 is arranged in the connecting sleeve 6, the upper end of the high-pressure short pipe 5 is communicated with the one-way valve water outlet interface 36 at the lower end of the valve seat eccentric hole 35, the lower end is communicated with the capsule inner cavity water inlet interface 83 at the upper end of the upper connecting sleeve 82 of the embolism tester, namely, the high-pressure short pipe 5 is communicated with the valve seat eccentric hole 35 and the capsule inner cavity 81. The valve rod of the check valve 32 is arranged in the valve seat eccentric hole 35, the upper end of the check valve spring 33 is abutted against the valve cover at the upper end of the check valve 32, and the lower end is abutted against the check valve spring seat body 34; the valve cover of the one-way valve 32 is separated from the one-way valve seat 31, the eccentric hole 23 of the piston body is communicated with the eccentric hole 35 of the valve seat, namely the first channel (A) is communicated, and the second channel (B) is closed; the valve cover of the one-way valve 32 is attached to the one-way valve seat 31, the eccentric hole 23 of the piston body is blocked from the eccentric hole 35 of the valve seat, namely, the first channel (A) is closed, and the second channel (B) is communicated.
In the embodiment, a core pipe water outlet port 41 at the lower end of the core pipe 4 is communicated with a water inlet port 71 at the upper end of the plug tester core pipe 7; a piston body outer ring sealing ring group 25 is arranged between the inner wall of the piston seat sleeve 21 and the outer wall of the piston body 22, and a check valve spring seat core pipe sealing ring group 37 is arranged between the check valve spring seat body 34 and the outer wall of the core pipe 4; a positioning rod 29 is arranged between the check valve spring seat body 34 and the piston body 22, the upper end of the positioning rod 29 extends into the positioning hole 28 of the piston body 22, and the lower end of the positioning rod is fixedly connected with the check valve spring seat body 34.
When the tester is lifted down, the piston body 22 and the piston seat cover 21 are in a hanging state. The piston body outer ring seal ring group 25 plays a sealing role between the piston body 22 and the piston seat sleeve 21, the piston body inner ring seal ring group 26 plays a sealing role between the piston body 22 and the core tube 4, and the check valve spring seat core tube seal ring group 37 plays a sealing role between the check valve spring seat body 24 and the core tube 4. When a conventional drilling tool or a rope drilling tool is adopted for drilling, the upper part of the pressurized water test device is required to be connected with a drill rod reducer union 1 corresponding to the drilling tool; when the hydraulic single-plug method or the hydraulic double-plug method is adopted, the lower part of the test device is connected with a corresponding single-plug or double-plug tester (shaped product) with technical parameters matched with the test section.
The pressurized water experimental device is designed to have two independent water flow channels (a first channel and a second channel) in order to achieve the purpose of saving a set of high-pressure water supply pipeline and still meeting the requirements of different pressurized water channels in different working procedures of pressurized water filling and test section pressurized water tests, has the functions of smooth sequence or sealing, timely switching in place and simple and reliable operation, and can timely bear the functions of the pressurized water filling and sealing capsule, the test section pressurized water test and the rapid pressure relief of a high-pressure area. In order to meet different requirements of various procedures such as water filling plug, sealing high-pressure area, maintaining tightness, test section water pressing test, quick pressure relief and the like in the whole water pressing test work, the device is designed to have the functions of a timely-switching and timely-sealing one-way valve assembly, and can respectively realize multiple functions such as the water filling plug, sealing a water filling channel, one-way flow stopping sealing, quick and reliable pressure relief and the like according to the procedures through simple operation.
The working principle of the invention is as follows:
(a) Pressurized water inflation embolic capsule process: and (3) starting pumping water to the in-hole tester to perform the process of inflating and embolizing the capsule, wherein the water flow path A of the whole drill string is as follows: the inner diameter hole of the drill rod, the through-flow channel 11 in the reducer union 1, the eccentric hole of the piston body, the eccentric hole of the valve seat 35 (at the moment, the one-way valve seat 31 and the valve cover of the one-way valve 32 are in a separated state), the water outlet interface 36 of the spring seat body of the one-way valve, the high-pressure short pipe 5, the water inlet interface 83 of the inner cavity of the embolic capsule, and the inner cavity 81 of the embolic capsule enter the capsule, and the action of the pressurized water inflation embolic capsule 8 is started. (the process water flow path A is shown in FIG. 1)
(b) Forming a timely high-pressure one-way valve: after the pressure gauge reaches a test pressure value and is basically stable, operating a vertical shaft of a drilling machine to control a drill stem to slowly descend for h, at the moment, after the plug capsule body 8 is fully inflated by pressurized water, contacting and compacting the hole wall, wherein the piston seat sleeve 21, the one-way valve spring seat body 24, the connecting sleeve 6 and the connecting sleeve 82 on the plug tester are integrally assembled in a threaded connection manner with the whole plug tester, and at the moment, the plug capsule body 8 and the hole wall are compacted to be in a fixed state along with the contact and compaction of the plug capsule body 8 and the hole wall; the piston body 22 can synchronously descend along with the drill rod and the reducer union 1 in the piston seat cover 21, the one-way valve seat 31 is contacted with the valve cover of the one-way valve 32 along with descending action and moving distance h to compress the one-way valve spring 33 to a designed compression position, so that the one-way valve seat 31 and the valve cover conical surface of the one-way valve 32 reach a sealing state, at the moment, the range from the lower part of the valve cover of the one-way valve 32 to the capsule cavity 81 after the plug capsule body 8 is expanded is a high-pressure water sealing area, and the one-way valve seat 31, the valve cover of the one-way valve 32 and the one-way valve spring 33 timely form a one-way valve structure effect, the action of the pressurized water inflation plug capsule body 8 is stopped by closing the inflation plug water flow path A, and high-pressure water in the capsule cavity 81 can not outwards leak.
(c) Starting a test section formal pressurized water test channel process: after the piston body inner ring sealing ring group 26 descends along with the piston body 22 to the proper position, the water through hole 24 is corresponding to the upper large hole of the piston body center hole 27 by the core pipe wall, the sealing of the water through hole 24 by the core pipe wall is simultaneously released, the water flow channel is converted into an open test section water pressure test water flow channel in time, and the water flow channel path B of the whole drill string in the process is as follows: the inner diameter hole of the drill rod, the through-flow channel 11 in the reducer union 1, the piston body center hole 27, the core pipe wall opposite water hole 24, the core pipe inner diameter hole, the core pipe water outlet port 41, the plug tester core pipe water inlet port 71, and the plug tester core pipe to the test section flower pipe water outlet. (the process water channel path B is shown in FIG. 2)
(d) The pressure release process comprises the following steps: after the water pressure test is finished, the water pump stops delivering water and opens the valve of the water diversion disk, the vertical shaft of the drilling machine is operated to pull up Quan Zuangan column h, so that the one-way valve seat 31 is completely separated from the valve cover of the one-way valve 32, the action of the one-way valve assembly is eliminated in time, the eccentric hole 23 of the piston body is opened, meanwhile, the inner ring sealing ring group 26 of the piston body is opposite to the water hole 24 along with the wall of the upward sealed core pipe of the piston body 22, at the moment, the water flow channel is identical to the channel path A of the procedure of the (1) pressurized water inflation plug capsule, but is in opposite flow direction, and the water flow channel is timely converted into A by B and plays a function of a drainage channel, and high-pressure water of the inner cavity 81 of the capsule flows into a water channel with a large inner diameter hole of the drill stem at a high speed under the pressure difference: when the common drill rod is adopted, the water through inner diameter hole is phi 22mm, and the water channel area is about 3.8cm 2 The method comprises the steps of carrying out a first treatment on the surface of the If the rope drill rod is adopted, the inner diameter hole for water passage is about phi 65mm, and the water passage area is about 34cm 2 The method comprises the steps of carrying out a first treatment on the surface of the In the prior art, the inner diameter of the water hole of the high-pressure hose is about phi 6mm, and the water channel area is about 0.28cm 2 According to the technical scheme, the area of the pressure relief water flow channel is increased by about 13-120 times, so that the whole pressure relief process can be rapid and reliable.
Detailed operation of the invention
When the deep hole water pressure test device is used for drilling by adopting a conventional drilling tool or a rope drilling tool, other operation steps are completely consistent except that drill rod reducer joints corresponding to the drilling tool are respectively connected to the upper surfaces of the test devices. When the single-plug method or the double-plug method is adopted, other operation steps are basically consistent except that the lower part of the test device is respectively connected with the corresponding single-plug or double-plug packer setting products.
The specific operation steps are as follows:
(1) Floor assembly: single-plug or double-plug testers (shaped products) of appropriate specifications are selected as required. Connecting all content components of the assembled test device according to the drawing and the use requirement; the lower end of the testing device is connected with a plug capsule inner cavity water inlet interface 83 of the testing device and a high-pressure short pipe 5, a plug testing device core pipe water inlet interface 71 is connected with a core pipe water outlet interface 41, and a reducer union 1 of a drill rod is connected with a drilling tool.
(2) And (3) putting the assembled plug tester and the novel pressurized water test device into the hole, and then connecting and putting drill rods corresponding to a conventional drilling tool or a rope drilling tool into the hole one by one (sealing measures are adopted among drill rod joints) until the designed pressurized water test hole is deep.
(3) The vertical shaft of the orifice drilling machine clamps and fixes the full Kong Zuangan column and makes a mark; the water distributing disc of the high-pressure pump and the ground water supply pipe used for drilling is connected with the water inlet pipe of the drill string.
(4) Starting pumping water to the hole tester, and starting the pressurized water capsule inflation process, wherein the water flow path of the whole drill string is as described in (a); and gradually increasing the pump pressure to enable the capsule to expand and contact with the hole wall to compress and completely seal the test hole section until the preset pressure value of the test section is 3-10 Mpa.
(5) The drill stem is controlled to slowly descend by adopting the vertical shaft of the drilling machine, at the moment, the joint device is in a timely one-way valve structure function as described in the step (b), the process of sealing the inflation plug water channel A to stop the pressurized water inflation capsule is stopped, and the high-pressure water in the inner cavity of the capsule cannot leak outwards.
(6) After the drill string and the piston body are lowered in place, the water flow channel is switched along with the drill string, the water through holes 24 are synchronously opened by the wall of the core tube, the water flow channel B for the test section water pressure test is opened, and the formal water pressure test procedure of the test section can be started by stages according to the pressure value of 0.3-1.0 Mpa required by the regulations.
(7) And after the water pressure test is finished, the water pump stops delivering water and opens the valve of the water distribution disc, the pressure release process is started, then the vertical shaft of the drilling machine is operated to pull up Quan Zuangan column h, at the moment, the water flow channel is the same as the water flow channel A in the water pressure swelling and embolism capsule process, but the water flow channel A is opposite in flow direction, and high-pressure water in the inner cavity of the capsule flows back to the low-pressure water channel of the large-inner diameter hole of the drill stem at a high speed, so that the pressure release process is rapid and reliable.
(8) Single plug method pressurized water test: if the single-plug pressurized water test method is adopted, after the complete pressure release plug capsule returns to the original state, the complete Kong Zuangan column and the single-plug tester are lifted up for the next drilling and pressurized water test working cycle.
Double embolism method water pressure test: if the double-embolism water pressure test method is adopted, after the complete decompression embolism capsule returns to the original state, the drill string and the double-embolism tester are moved to the position of the next test section, pumping water is continuously started again, the water pressure inflation embolism capsule procedure of the next test section and the subsequent water pressure test procedure are started, and the steps are circulated section by section until the complete hole water pressure test work is completed.
The foregoing has shown and described the basic principles and main structural features of the present invention. The present invention is not limited to the above examples, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a deep hole pressurized-water test device, includes reducing joint (1), piston subassembly, check valve subassembly and the embolism capsule body (8) of being connected with the drilling tool, its characterized in that: the piston assembly comprises a piston seat sleeve (21) and a piston body (22) sleeved in the piston seat sleeve (21), and the upper end of the piston body (22) extends out of the piston seat sleeve (21) and is fixedly connected with the reducer union (1); the piston body (22) is provided with a piston body center hole (27) and a piston body eccentric hole (23) in parallel along the axial direction, and the piston body center hole (27) is arranged on the axial line of the piston body (22); the upper end of the piston body eccentric hole (23) is communicated with the through-flow channel (11) of the reducer union (1), and the lower end of the piston body eccentric hole is communicated with the capsule cavity (81) of the embolic capsule body (8) through a one-way valve assembly to form a first channel;
the piston body center hole (27) upper end and the through-flow channel (11) of reducing joint (1) communicate, be equipped with core pipe (4) in piston body center hole (27), be equipped with two sets of piston body inner ring sealing washer group (26) that are used for sealedly between core pipe (4) outer wall upper portion and piston body center hole (27) pore wall, two sets of be equipped with core pipe wall pair water hole (24) between piston body inner ring sealing washer group (26), piston body center hole (27) are through core pipe wall pair water hole (24) and core pipe (4) inner chamber hole intercommunication, core pipe (4) lower extreme passes check valve subassembly and embolism tester core pipe (7) intercommunication, embolism tester core pipe (7) lower extreme passes capsule inner chamber (81) and test section flower pipe delivery port intercommunication, forms the second passageway.
2. The deep hole water pressure test device of claim 1, wherein: the check valve assembly comprises a check valve seat (31) arranged at a water outlet of the eccentric hole (23) of the piston body, a check valve (32) matched with the check valve seat (31), a check valve spring (33) and a check valve spring seat body (34), wherein the upper end of the check valve spring seat body (34) is fixedly connected with the lower end of the piston seat sleeve (21) through threads, a valve seat eccentric hole (35) is formed in the middle of the check valve spring seat body (34), a valve rod of the check valve (32) is arranged in the valve seat eccentric hole (35), the upper end of the check valve spring (33) abuts against a valve cover at the upper end of the check valve (32), and the lower end of the check valve spring seat body abuts against the check valve spring seat body (34); the valve cover of the one-way valve (32) is separated from the one-way valve seat (31), and the eccentric hole (23) of the piston body is communicated with the eccentric hole (35) of the valve seat; the valve cover of the one-way valve (32) is attached to the one-way valve seat (31), and the eccentric hole (23) of the piston body is cut off from the eccentric hole (35) of the valve seat.
3. The deep hole water pressure test device according to claim 2, wherein: the one-way valve water outlet port (36) at the lower end of the valve seat eccentric hole (35) is communicated with the capsule inner cavity (81) through the high-pressure short pipe (5).
4. A deep hole water pressure test apparatus according to claim 3, wherein: the lower end of the one-way valve spring seat body (34) is fixedly connected with the upper end of the connecting sleeve (6) through threads, the lower end of the connecting sleeve (6) is fixedly connected with the upper connecting sleeve (82) of the embolism tester through threads, and the embolism capsule body (8) is fixedly connected with the upper connecting sleeve (82) of the embolism tester; the high-pressure short pipe (5) is arranged in the connecting sleeve (6), and the high-pressure short pipe (5) is communicated with the water inlet interface (83) of the inner cavity of the capsule.
5. The deep hole water pressure test device of claim 1, wherein: the piston body center hole (27) is a stepped hole, and the upper aperture is larger than the lower aperture; the upper part of the core tube (4) is sealed with the small hole at the lower part of the piston body center hole (27) through two groups of piston body inner ring sealing ring groups (26), the drilling tool drives the piston body (22) to move downwards relative to the piston seat sleeve (21) through the reducer union (1), the drilling tool descends to the position that the water through hole (24) is opposite to the upper large hole of the piston body center hole (27) on the wall of the core tube, and the piston body center hole (27) is communicated with the inner cavity hole of the core tube (4) through the water through hole (24) on the wall of the core tube.
6. The deep hole water pressure test device of claim 1, wherein: the core pipe water outlet interface (41) at the lower end of the core pipe (4) is communicated with the water inlet interface (71) at the upper end of the core pipe (7) of the embolism tester.
7. The deep hole water pressure test device according to claim 2, wherein: a check valve spring seat core pipe sealing ring group (37) is arranged between the check valve spring seat body (34) and the outer wall of the core pipe (4).
8. The deep hole water pressure test device according to claim 2, wherein: a positioning rod (29) is arranged between the one-way valve spring seat body (34) and the piston body (22).
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| CN110018103B (en) * | 2019-04-25 | 2021-08-03 | 江西理工大学 | Building foundation on-site penetration test device and test method thereof |
| CN110700819B (en) * | 2019-10-12 | 2023-08-18 | 重庆市市政设计研究院 | Anhydrous drilling sound wave detection and pressurized water test integrated device |
| CN113417637B (en) * | 2021-06-18 | 2022-08-26 | 中国平煤神马能源化工集团有限责任公司 | Water pressurizing test system and method |
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