CN219864916U - Drilling debris collecting device for hydraulic fracturing method ground stress test - Google Patents
Drilling debris collecting device for hydraulic fracturing method ground stress test Download PDFInfo
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- CN219864916U CN219864916U CN202321194767.3U CN202321194767U CN219864916U CN 219864916 U CN219864916 U CN 219864916U CN 202321194767 U CN202321194767 U CN 202321194767U CN 219864916 U CN219864916 U CN 219864916U
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- 238000012360 testing method Methods 0.000 title claims abstract description 38
- 238000005553 drilling Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 238000009662 stress testing Methods 0.000 claims 2
- 239000012634 fragment Substances 0.000 abstract description 19
- 230000008569 process Effects 0.000 abstract description 17
- 230000002829 reductive effect Effects 0.000 abstract description 9
- 238000005299 abrasion Methods 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000008859 change Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000003673 groundwater Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000007788 liquid Substances 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
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Abstract
The utility model discloses a drilling debris collecting device for hydraulic fracturing method ground stress test, wherein the bottom end of a drill rod is sequentially connected with an upper collector, an upper packer, a fracturing section, a lower packer and a lower collector in series, the upper collector and the lower collector are respectively of hollow tubular structures, a plurality of drain holes are respectively arranged on the outer walls of the upper collector and the lower collector, two ends of the upper collector are respectively connected with the drill rod and the upper packer, the top end of the lower collector is in sealing connection with the lower packer, the outer diameters of the upper collector and the lower collector are equivalent to those of the corresponding upper packer and lower packer, and the upper collector is communicated with the upper packer and is provided with a filter screen. The utility model is provided with the upper and lower collectors with the same outer diameter and hollow tubular shape on the outer sides of the upper and lower packers, and the drain holes are arranged on the outer walls of the upper and lower collectors, so that not only can the fragments falling in the ground stress test process be collected, but also the abrasion and damage of the fragments to the packers in the up-and-down movement process can be reduced, and the utility model has the characteristics of simple structure, high collection efficiency of drilling fragments and small loss of the packers.
Description
Technical Field
The utility model belongs to the technical field of geological exploration, and particularly relates to a drilling debris collecting device for hydraulic fracturing ground stress test, which has the advantages of simple structure, high drilling debris collecting efficiency and small packer loss.
Background
In the process of investigation and design of large-scale underground engineering such as mine engineering, traffic tunnel engineering and the like, the influence of a ground stress field on underground engineering design and construction is generally required to be considered, and the ground stress characteristic is important to master through drilling as an important basis of engineering design.
Currently, in deep hole ground stress test, the hydraulic fracturing method is a common test method because of theoretical maturity, simple operation, large measurement depth, low cost and capability of adapting to test work of various apertures, and can preliminarily find out the change characteristics of ground stress along with depth for underground engineering which is not disclosed temporarily, so as to further judge the stability of underground engineering rock burst and nearby geological structures. And (3) in the hydraulic fracturing method, a section of exposed drilling hole of the bedrock is selected during the test, liquid is injected into the drilling hole through a fracturing section after the drilling hole is sealed by a packer, the pressure is applied until the wall of the sealed hole breaks, then pressure change data are collected and analyzed, the breaking direction is recorded or observed by a die device, and finally the size and the direction of the primary stress of the original stratum are calculated according to the data such as the pressure change and the direction in the breaking process. However, the hydraulic fracturing method still needs to face challenges of adverse geological conditions during testing. When the test drill hole passes through the relatively broken section, the lifting operation of the hydraulic fracturing test equipment is directly affected by small fragments falling from the hole wall, and after the small fragments fall between the test equipment and the hole wall, the friction between the equipment and the hole wall can be increased, so that the test equipment cannot lift and damage a rubber sleeve of the packer, and the test equipment is scrapped under serious conditions.
In the prior art, in order to solve the adverse effect of drilling scraps on the testing equipment, scraps falling from the upper part are generally considered, and a corresponding protection device is arranged at the upper end of the packer, so that the damage of the scraps on the rubber sleeve of the packer in the ascending process of the testing equipment can be reduced, and the problem that the lifting recovery cannot be realized can be avoided; however, the abrasion of broken hole walls and fragments in underground water in the descending process of the test equipment and the impact of the underground water in the holes on collected fragments in the ascending and descending process of the test equipment are not considered, so that the rubber sleeve of the packer is difficult to avoid being abraded or even damaged in the descending process, and the fragments in the holes cannot be stably collected, so that the follow-up accurate analysis on the change rule of the ground stress is affected. Therefore, in the prior art, rigid conical devices are respectively arranged at the outer ends of the upper packer and the lower packer, and a protective sleeve is arranged outside a drill rod to collect scraps at the upper part, so that the rubber sleeve is protected in the lifting and lowering processes to reduce the loss of the packer; but the cone-shaped device only plays a role in protection, and cannot solve the problem that the collected fragments are impacted by underground water in the hole in the lifting process of the test equipment, and the disturbance to the underground water in the hole is possibly increased, so that the collection of drilling fragments in the hole is more difficult, and the subsequent analysis and judgment on the ground stress are seriously influenced.
Disclosure of Invention
According to the defects of the prior art, the drilling debris collecting device for the hydraulic fracturing method ground stress test is simple in structure, high in drilling debris collecting efficiency and small in packer loss.
The utility model is realized in the following way: including the drilling rod, the bottom of drilling rod detachable in proper order has last collector, last packer, fracturing section, lower packer, lower collector in series, go up the collector and keep away from the interval on the outer wall of fracturing section one side for cavity tubular structure respectively and lower collector and be provided with a plurality of wash ports, the top and the drilling rod sealing connection and lower extreme and last packer intercommunication of going up the collector, be provided with the filter screen that the aperture is less than the wash port between last collector and the last packer, the top and the lower packer sealing connection of lower collector, the lower part external diameter of going up the collector is equivalent with last packer external diameter, the upper portion external diameter of lower collector is equivalent with lower packer external diameter.
The utility model has the beneficial effects that:
1. according to the utility model, the upper and lower hollow tubular collectors with the same outer diameter are respectively arranged at the outer sides of the upper and lower packers, the drain holes are arranged on the outer walls of the collectors, the upper collector is communicated with the upper packer, and the filter screen is arranged between the upper collector and the upper packer, so that drilling fragments of test equipment in the lifting and descending processes can be efficiently collected through the cooperation of the drain holes and the filter screen, the impact of underground water in the holes on the collected fragments in the lifting process can be weakened, the stable and efficient collection of the fragments in the drilling holes can be realized, and the accurate analysis of the subsequent stress change rule can be improved.
2. According to the utility model, the collectors with the same outer diameter are arranged at the outer sides of the upper packer and the lower packer, and the borehole wall can be shaped in advance in the lifting process, so that the abrasion and even damage of broken borehole walls and fragments in groundwater to the rubber sleeve can be reduced, the tightness of the rubber sleeve is ensured, the accuracy of the ground stress test is ensured, and the problem that the test equipment cannot lift and recover can be avoided; and the drainage holes of the collector are matched with the filter screen, so that the chips in the underground water in the drilled hole can be reduced, the collected chips can be prevented from overflowing again, the friction damage effect of the chips on the packer can be further reduced, and the aims of effectively reducing the loss of the packer and improving the ground stress test efficiency are fulfilled.
3. The utility model further sets the drain holes on the outer walls of the upper collector and the lower collector to be inclined holes inclined to the collecting side, which is beneficial to better capturing the scraps in the underground water in the drilling holes in the lifting process of the collectors; and the drain holes on the outer walls of the upper collector and the lower collector are respectively arranged to be gradually increased in diameter towards the outer collecting side, so that layered collection of the scraps can be realized, and the phenomenon that the collection of the scraps is influenced due to blockage of the drain holes can be effectively avoided.
4. The utility model further arranges the concave cone table groove at one end of the lower collector far away from the lower packer, and arranges a plurality of drain holes or bottom openings on the inner wall of the cone table groove, thereby filtering large particle fragments in groundwater by using the cone table groove, avoiding abrasion of the packer by the large particle fragments, being convenient for collecting fragments for testing, and being beneficial to improving the collection efficiency of the fragments.
In conclusion, the utility model has the characteristics of simple structure, high drilling debris collection efficiency and small packer loss.
Drawings
FIG. 1 is a schematic diagram of one embodiment of the present utility model;
FIG. 2 is a second schematic diagram of the structure of the present utility model;
FIG. 3 is an enlarged partial cut-away view of FIG. 1;
FIG. 4 is an enlarged partial cut-away view of FIG. 2;
in the figure: the device comprises a drill rod 1, an upper collector 2, an upper packer 3, a 4-fracturing section, a lower packer 5, a lower collector 6, a 7-drain hole, a 8-filter screen, a 9-frustum portion I, a 10-frustum groove and a 11-frustum portion II.
Detailed Description
The utility model is further illustrated in the following figures and examples, which are not intended to be limiting in any way, and any alterations or modifications based on the teachings of the utility model are within the scope of the utility model.
As shown in fig. 1 to 4, the utility model comprises a drill rod 1, wherein an upper collector 2, an upper packer 3, a fracturing section 4, a lower packer 5 and a lower collector 6 are sequentially and detachably connected in series at the bottom end of the drill rod 1, the upper collector 2 and the lower collector 6 are respectively of hollow tubular structures, a plurality of drain holes 7 are formed in the outer wall of one side far away from the fracturing section 4 at intervals, the top end of the upper collector 2 is in sealing connection with the drill rod 1, the lower end of the upper collector 2 is communicated with the upper packer 3, a filter screen 8 with the aperture smaller than the drain holes 7 is arranged between the upper collector 2 and the upper packer 3, the top end of the lower collector 6 is in sealing connection with the lower packer 5, the outer diameter of the lower part of the upper collector 2 is equal to the outer diameter of the upper packer 3, and the outer diameter of the upper part of the lower collector 6 is equal to the outer diameter of the lower packer 5.
The section of the lower part of the outer wall of the upper collector 2, which occupies 1/3-1/2 of the total length, is closed without a drain hole 7, and the section of the upper part of the outer wall of the lower collector 6, which occupies 1/3-1/2 of the total length, is closed without a drain hole 7.
The axis of the drain hole 7 on the outer wall of the upper collector 2 is vertical to the outer wall or inclined to one side of the drill rod 1, and the axis of the drain hole 7 on the outer wall of the lower collector 6 is vertical to the outer wall or inclined to one side far away from the lower packer 5.
The diameter of the drain hole 7 on the outer wall of the upper collector 2 is gradually reduced along the axial direction towards the side of the upper packer 3, and/or the diameter of the drain hole 7 on the outer wall of the lower collector 6 is gradually reduced along the axial direction towards the side of the lower collector 6.
The drain hole 7 is a taper hole with large outside and small inside.
The upper collector 2 is provided with a hollow frustum portion I9 near the upper portion of the drill rod 1, the top end of the frustum portion I9 is in detachable sealing connection with the drill rod 1, and a plurality of drain holes 7 are formed in the outer wall of the frustum portion I9 at intervals. The drain hole 7 on the inclined frustum portion i 9 has an opening facing the catching direction, so that the chips can be caught better to improve the catching effect, and the guide effect can be achieved when shaping the hole wall.
The one end that lower collector 6 kept away from lower packer 5 is sealed and is provided with concave frustum groove 10, the opening direction of frustum groove 10 deviates from lower packer 5, the awl end of frustum groove 10 is sealed and the interval is provided with a plurality of wash ports 7 on the inner wall, or the awl end of frustum groove 10 is provided with the opening.
The frustum groove 10 is coaxial with the lower collector 6; the drain hole 7 on the outer wall of the lower collector 6 is arranged in the middle of the lower packer 5, and the drain hole 7 on the inner wall of the frustum groove 10 is arranged on one side of the near-conical bottom.
The aperture of the drain hole 7 on the inner wall of the frustum groove 10 or the aperture of the opening of the conical bottom is not smaller than the aperture of the drain hole 7 on the outer wall of the lower collector 6.
The lower part of the lower collector 6 far away from the lower packer 5 is provided with a hollow frustum portion II 11, and a plurality of drain holes 7 are formed in the outer wall of the upper part of the frustum portion II 11 close to the lower packer 5 at intervals. The inclined frustum portion II 11 acts the same as the frustum portion I9, so that the chips can be better caught to improve the catching effect.
The upper collector 2 and the lower collector 6 are of wear-resistant rigid hollow tubular structures such as steel or hard plastics.
The drill rod 1, the upper collector 2, the upper packer 3, the fracturing section 4, the lower packer 5 and the lower collector 6 are sequentially connected through threads.
The working principle and the working process of the utility model are as follows:
as shown in fig. 1 to 4, during the lifting process of the test equipment, the chips on the wall of the upper drilling hole drop under the friction and disturbance action of the drilling rod 1, and the upper collector 2 enters the upper collector 2 along with the groundwater through the collecting holes (namely the drain holes 7) under the friction action of the drilling rod 1, the chips and the wall of the drilling hole, and enters the upper packer 3 through the filter screen 8 at the bottom end to drain the redundant water, so that the collected chips are reserved in the upper collector 2 at the upper end of the filter screen 8, and the filter screen 8 with smaller pore diameter also ensures that the chips cannot overflow the upper collector 2 again; while the test equipment is lowered, when the equipment encounters suspended debris in the groundwater, the debris can enter the test equipment along the frustum groove 10 and the collecting holes (namely the drain holes 7) at the bottom of the lower collector 6 along with water flow, and the rest of the water is discharged through the rest of the drain holes 7, so that the debris entering the lower collector 6 is deposited in the test equipment, and the fact that the debris cannot overflow the lower collector 6 again is ensured. Meanwhile, in the lifting and descending process of the testing equipment, the rigid collector can also reshape the borehole wall in advance, so that abrasion and even damage of broken hole walls and fragments in groundwater to the packer can be reduced. In addition, the frustum parts on the upper side and the lower side of the collector can form progressive shaping on the hole wall during lifting, so that the blocking of the broken hole wall on the lifting of the test equipment can be reduced or even eliminated.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present utility model should be included in the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.
Claims (9)
1. The utility model provides a drilling piece collection device for among hydraulic fracturing method crustal stress test, includes drilling rod (1), its characterized in that the bottom of drilling rod (1) is detachable in proper order has last collector (2), goes up packer (3), fracturing section (4), lower packer (5), lower collector (6), go up collector (2) and lower collector (6) and be hollow tubular structure respectively and keep away from interval on the outer wall of fracturing section (4) one side and be provided with a plurality of wash ports (7), the top and the drilling rod (1) sealing connection and lower extreme and last packer (3) intercommunication of going up collector (2), be provided with filter screen (8) that the aperture is less than wash port (7) between last collector (2) and last packer (3), the top and the lower packer (5) sealing connection of going up collector (2) external diameter and last packer (3) external diameter are comparable, the upper portion external diameter of lower collector (6) is comparable with the external diameter of lower packer (5).
2. Drilling debris collecting device for use in a hydraulic fracturing method ground stress test according to claim 1, wherein the lower part of the outer wall of the upper collector (2) is provided with a section of a closure which occupies 1/3-1/2 of the total length without a drain hole (7), and the upper part of the outer wall of the lower collector (6) is provided with a section of a closure which occupies 1/3-1/2 of the total length without a drain hole (7).
3. Drilling debris collection device for use in a hydraulic stress test according to claim 2, characterised in that the drainage hole (7) axis on the outer wall of the upper collector (2) is perpendicular to the outer wall or inclined to the side of the drill pipe (1), and the drainage hole (7) axis on the outer wall of the lower collector (6) is perpendicular to the outer wall or inclined to the side remote from the lower packer (5).
4. Drilling debris collection device for use in a hydraulic stress test according to claim 2, characterised in that the drainage hole (7) in the outer wall of the upper collector (2) is tapered in an axial direction towards the side of the upper packer (3) and/or the drainage hole (7) in the outer wall of the lower collector (6) is tapered in an axial direction towards the side of the lower collector (6).
5. Drilling debris collecting device for use in hydraulic fracturing crustal stress test according to claim 2, wherein the upper part of the upper collector (2) near the drill rod (1) is provided with a hollow frustum portion i (9), the top end of the frustum portion i (9) is detachably and hermetically connected with the drill rod (1), and a plurality of drainage holes (7) are formed in the outer wall of the frustum portion i (9) at intervals.
6. Drilling debris collecting device for use in hydraulic fracturing crustal stress testing according to any of claims 1 to 5, wherein the end of the lower collector (6) far away from the lower packer (5) is closed and provided with a concave conical table groove (10), the opening direction of the conical table groove (10) is away from the lower packer (5), the conical bottom of the conical table groove (10) is sealed and the inner wall is provided with a plurality of drain holes (7) at intervals, or the conical bottom of the conical table groove (10) is provided with an opening.
7. Drilling debris collection device for use in a hydraulic fracturing crustal stress test according to claim 6, characterized in that said cone groove (10) is coaxial with the lower collector (6); the drainage hole (7) on the outer wall of the lower collector (6) is arranged in the middle, and the drainage hole (7) on the inner wall of the conical table groove (10) is arranged on one side close to the conical bottom.
8. The drilling debris collecting device for use in the hydraulic fracturing crustal stress test according to claim 7, wherein the aperture of the drain hole (7) on the inner wall of the conical table groove (10) or the aperture of the opening of the conical bottom is not smaller than the aperture of the drain hole (7) on the outer wall of the lower collector (6).
9. Drilling debris collecting device for use in hydraulic fracturing crustal stress testing according to claim 7, wherein the lower part of said lower collector (6) far from the lower packer (5) is provided with a hollow frustum portion ii (11), and a plurality of drainage holes (7) are provided on the outer wall of the upper part of the frustum portion ii (11) near to the lower packer (5) at intervals.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310000052.8A CN115680537A (en) | 2023-01-01 | 2023-01-01 | Drilling debris collecting device used in hydrofracturing method ground stress test |
| CN2023100000528 | 2023-01-01 |
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| Publication Number | Publication Date |
|---|---|
| CN219864916U true CN219864916U (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310000052.8A Pending CN115680537A (en) | 2023-01-01 | 2023-01-01 | Drilling debris collecting device used in hydrofracturing method ground stress test |
| CN202321194767.3U Active CN219864916U (en) | 2023-01-01 | 2023-05-17 | Drilling debris collecting device for hydraulic fracturing method ground stress test |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310000052.8A Pending CN115680537A (en) | 2023-01-01 | 2023-01-01 | Drilling debris collecting device used in hydrofracturing method ground stress test |
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| CN (2) | CN115680537A (en) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1739699A1 (en) * | 1989-07-24 | 1995-04-20 | Печорский государственный научно-исследовательский и проектный институт нефтяной промышленности | Method for treatment of bottom-hole formation zone and device for its realization |
| CA2432355C (en) * | 1997-05-19 | 2006-08-15 | Halliburton Energy Services, Inc. | Control of fine particulate flowback in subterranean wells |
| CA2291991C (en) * | 1999-12-10 | 2003-09-30 | Polar Completions Engineering Inc. | Junk basket and method of use |
| US6758275B2 (en) * | 2002-08-16 | 2004-07-06 | Weatherford/Lamb, Inc. | Method of cleaning and refinishing tubulars |
| CA2979736C (en) * | 2010-05-18 | 2019-10-22 | Isolation Equipment Services, Inc. | System, apparatus and process for collecting balls from wellbore fluids containing sand |
| CN202596631U (en) * | 2012-05-28 | 2012-12-12 | 中国石油天然气股份有限公司 | Oil well setting sand collecting device |
| CN206129236U (en) * | 2016-10-18 | 2017-04-26 | 西北大学 | Belt cleaning device under oil well |
| EP3964730A1 (en) * | 2017-03-14 | 2022-03-09 | Evoqua Water Technologies LLC | Composite loop chain |
| IT201800007671A1 (en) * | 2018-07-31 | 2020-01-31 | Luca Maffeo Albertelli | HYDROGEOLOGICAL RISK MONITORING SYSTEM AND METHOD |
| CN208653679U (en) * | 2018-09-13 | 2019-03-26 | 北京科技大学 | A kind of hydrofracturing detecting earth stress unit protection device |
| US10982535B2 (en) * | 2019-09-14 | 2021-04-20 | HanYi Wang | Systems and methods for estimating hydraulic fracture surface area |
| US11608717B2 (en) * | 2021-04-09 | 2023-03-21 | Halliburton Energy Services, Inc. | Tool deployment and cleanout system |
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2023
- 2023-01-01 CN CN202310000052.8A patent/CN115680537A/en active Pending
- 2023-05-17 CN CN202321194767.3U patent/CN219864916U/en active Active
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