CN209976470U - Gravel stratum pipe well dewatering well completion device - Google Patents
Gravel stratum pipe well dewatering well completion device Download PDFInfo
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- CN209976470U CN209976470U CN201920545696.4U CN201920545696U CN209976470U CN 209976470 U CN209976470 U CN 209976470U CN 201920545696 U CN201920545696 U CN 201920545696U CN 209976470 U CN209976470 U CN 209976470U
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Abstract
A gravel stratum pipe well dewatering well completion device comprises a drilling machine, a drill rod, a down-the-hole impactor, a guider, a hole expanding drilling tool, a central drilling tool, a pipe shoe, a steel well pipe and a hydraulic system; compressed air enters the down-the-hole hammer through the drill rod, a piston of the down-the-hole hammer impacts a guider of a pipe following drilling tool, the guider transmits impact waves and drilling pressure to the hole expanding drill bit and the central drill bit to crush soil, meanwhile, the drilling tool drives the drill rod to rotate, the drill rod drives the down-the-hole hammer and the guider to rotate, and the hole expanding drill bit and the central drill bit simultaneously rotate along with the guider to form a well. The beneficial effects of the utility model reside in that: the device for forming the well under the condition of the pebble stratum adopts a down-the-hole hammer to form the hole, the well is formed by following a steel well pipe, the occupied area of equipment is small, the well forming time is short, a mud protective wall is not needed, independent well washing is not needed, the well is formed by drilling to the designed depth, the well forming efficiency is greatly improved, the construction cost is reduced, and the precipitation design index is met.
Description
Technical Field
The utility model belongs to the technical field of the well drilling, especially, relate to a gravel stratum pipe well precipitation well-completion device.
Background
With the pace of urbanization progress in China being accelerated, urban construction is going on vigorously. The construction depth is gradually increased, and higher requirements are provided for precipitation construction. For pebble strata, tubular well precipitation is generally adopted. The traditional pipe well precipitation well completion process mainly comprises forward and reverse circulation drilling pore-forming, rotary drilling pore-forming, impact drilling pore-forming and the like, and the construction methods have different defects respectively, such as large construction occupied area, long well completion time, large environmental impact of slurry generated in the well completion process, poor well washing quality and the like. In addition, the traditional well completion method mainly comprises the following steps: the well drilling process is complex, and the well casing is pulled out after the well casing is sunk, namely the well casing and the well casing are completely pulled out, even the well completion failure is caused.
Disclosure of Invention
The utility model discloses to prior art's not enough, provided a pebble stratum pipe well precipitation well-completion device, the device's utilization can realize once only becoming the well completely, and it is big to have avoided the technology construction of traditional well-completion in-process to take up an area of, and well-completion is long, and a series of problems such as the mud that well-completion in-process produced is great and well-flushing quality is poor to the environmental impact.
The utility model relates to a gravel stratum pipe well dewatering well completion device, which comprises a drilling machine, a drill rod, a down-the-hole impacter, a guider, a hole expanding drilling tool, a central drilling tool, a pipe boot, a steel well pipe and a hydraulic system;
the drilling machine is connected with a drill rod, the other end of the drill rod is provided with a down-the-hole impactor, the other end of the down-the-hole impactor is provided with a guider, the other end of the guider is provided with a hole expanding drilling tool, a central axis of the hole expanding drilling tool is provided with a through hole, and the central drilling tool penetrates through the through hole of the hole expanding drilling tool and then is connected to the down-the-hole impactor;
the pipe shoe is arranged on the outer side of the reaming drilling tool, and a plurality of steel well pipes are vertically and sequentially welded at the upper end of the pipe shoe;
the reaming drilling tool comprises a reaming drilling tool body and two reaming bits, and the reaming bits are hinged to the bottom end face of the reaming drilling tool body; two hydraulic rods are arranged on a drill rod of a central drilling tool at the lower end of the reaming drilling tool body, and the positions of the hydraulic rods on the drill rod of the central drilling tool and the fixed positions of the reaming bit and the reaming drilling tool body are on the same straight line;
the hydraulic system comprises a hydraulic pump and a hydraulic pipeline, and the hydraulic pipeline consists of a drill rod, a down-the-hole hammer and a through hole in the drill rod of the central drilling tool; hydraulic oil in the hydraulic pump is pumped into the hydraulic rod through the drill rod, the down-the-hole impacter and the through hole in the drill rod of the central drilling tool;
the reaming bit is expanded and furled through the stretching of the hydraulic rod, and the end head of the hydraulic rod is hinged with the reaming bit.
Furthermore, the steel well pipe is placed in the well mouth as a well wall, and a plurality of water seepage pores are arranged on the pipe wall of the steel well pipe.
Furthermore, the water seepage pores are in a long strip shape or a round shape or a square shape.
Furthermore, the steel well pipe at the bottommost end of the well wall is in threaded connection with the pipe shoe or is welded and fixed with the pipe shoe.
Furthermore, the diameter of the drill bit of the central drilling tool and the diameter of the furled expanding drilling tool are both smaller than the inner diameter of the pipe boot and the inner diameter of the steel well pipe, and the expanded working diameter of the two expanding drilling bits is larger than the diameter of the steel well pipe.
Furthermore, the hydraulic rod is multi-stage telescopic.
Furthermore, a protruding structure is arranged at the contact position of the inner wall of the pipe boot and the bottom end of the guide device.
Furthermore, the horizontal plane included angle of the two expanding drill bits of the expanding drill tool is 180 degrees.
Technical scheme's beneficial effect lies in: the well forming device under the condition of the pebble stratum adopts a down-the-hole hammer to form a hole and follows a steel well pipe to form a well, the equipment occupation range is small, the well forming time is short, a mud protective wall is not needed, the well is not needed to be washed separately, the well is formed when the well is drilled to the designed depth, the well forming efficiency is greatly improved, the construction cost is reduced, and the precipitation design index is met; in addition, after the precipitation operation is finished, the steel well pipe can be recycled.
Drawings
Fig. 1 is a schematic structural diagram of a gravel stratum pipe well dewatering well completion device according to the present invention;
fig. 2 is a schematic structural diagram of the pebble stratum pipe well dewatering well completion device in a working state;
fig. 3 is a schematic structural view of a steel well pipe of the gravel stratum pipe well dewatering well completion device according to the present invention;
fig. 4 is a schematic structural view of a central drilling tool of the gravel stratum pipe well dewatering well completion device of the present invention;
fig. 5 is a schematic structural view of a hole expanding drilling tool of the gravel stratum pipe well dewatering well completion device of the present invention;
in the figure: 1. the drilling tool comprises a drilling rod, a 2-down-the-hole impactor, a 3-hole expanding drilling tool, a 4-hole expanding drilling bit, a 5-center drilling tool, a 6-hydraulic rod, a 7-pipe shoe, an 8-steel well pipe, a 9-water-seepage pore space, a 10-guide device, a 11-center drilling tool drilling rod, a 12-center drilling tool drilling bit and a 13-hole expanding drilling tool body.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the following specific embodiments.
As shown in fig. 1 and 2, the gravel stratum pipe well dewatering well completion device of the present invention comprises a drilling machine, a drill pipe, a down-the-hole hammer, a pilot, a hole expanding drilling tool, a central drilling tool, a pipe shoe, a steel well pipe and a hydraulic system;
the drilling machine is connected with a drill rod, the other end of the drill rod is provided with a down-the-hole impactor, the other end of the down-the-hole impactor is provided with a guider, the other end of the guider is provided with a hole expanding drilling tool, a central axis of the hole expanding drilling tool is provided with a through hole, and the central drilling tool penetrates through the through hole of the hole expanding drilling tool and then is connected to the down-the-hole impactor;
the pipe shoe is arranged on the outer side of the reaming drilling tool, and a plurality of steel well pipes are vertically and sequentially welded at the upper end of the pipe shoe;
the reaming drilling tool comprises a reaming drilling tool body and two reaming bits, and the reaming bits are hinged to the bottom end face of the reaming drilling tool body; two hydraulic rods are arranged on a drill rod of a central drilling tool at the lower end of the reaming drilling tool body, and the positions of the hydraulic rods on the drill rod of the central drilling tool and the fixed positions of the reaming bit and the reaming drilling tool body are on the same straight line;
the hydraulic system comprises a hydraulic pump and a hydraulic pipeline, and the hydraulic pipeline consists of a drill rod, a down-the-hole hammer and a through hole in the drill rod of the central drilling tool; hydraulic oil in the hydraulic pump is pumped into the hydraulic rod through the drill rod, the down-the-hole impacter and the through hole in the drill rod of the central drilling tool;
the reaming bit is expanded and furled through the stretching of the hydraulic rod, and the end head of the hydraulic rod is hinged with the reaming bit.
Furthermore, the steel well pipe is used as a well wall and placed in the well mouth, and a plurality of water seepage pores are arranged on the pipe wall of the steel well pipe; the water seepage pores are in a strip shape, a round shape or a square shape; the steel well pipe at the bottommost end of the well wall is in threaded connection with the pipe shoe or is welded and fixed with the pipe shoe; the diameter of the drill bit of the central drilling tool is smaller than the inner diameter of the pipe boot and the inner diameter of the steel well pipe, and the expanded working diameter of the two expanding drill bits is larger than the diameter of the steel well pipe; the hydraulic rod is multi-stage telescopic; a convex structure is arranged at the contact position of the inner wall of the pipe boot and the bottom end of the guide device; the horizontal plane included angle of the two expanding drill bits of the expanding drilling tool is 180 degrees.
The utility model relates to a concrete application method of cobble stratum pipe well precipitation well-completion device does:
the method comprises the following steps: construction preparation, namely, carrying out tee joint leveling on a field, setting a construction fence and a warning mark, and finding out underground pipelines and underground structures;
step two: manufacturing a steel well pipe according to design requirements;
step three: and (3) measuring the well placement position, namely, positioning the drilling machine in place, and measuring the well placement position according to a well pattern, an underground pipeline distribution diagram and a surrounding and supporting system of a dewatering design scheme, wherein the drilling machine is positioned in place and is stably placed.
Step four: installing a first section of steel well pipe, wherein the first section of steel well pipe is in threaded connection or welded with a pipe shoe; placing the installed first section of steel well pipe at a preset position;
step five: drilling to form a hole, namely placing a drill bit of the well forming device in the first section of steel well pipe, opening a hole expanding drill bit, drilling to form a hole with the central drilling tool at the same time, and connecting the following sections of steel well pipes by adopting equal-strength welding;
step six: recovering the drilling tool, drilling to the designed depth, collecting the reaming bit, and taking out the reaming bit and the central drilling tool from the steel well pipe;
step seven: washing the well and forming the well, namely washing the well by adopting an air compressor until the water is cleaned and sand is removed, and finishing the dewatering of the well;
step eight: and (5) recovering the steel well pipe, and pulling out the steel well pipe by using pulling equipment after the precipitation operation is finished.
In the technical scheme of the utility model, the hydraulic system comprises a hydraulic pump and a hydraulic pipeline, and the hydraulic pipeline is composed of a drill rod, a down-the-hole hammer and a through hole inside the drill rod of the central drilling tool; hydraulic oil in the hydraulic pump is pumped into the hydraulic rod through the drill rod, the down-the-hole impacter and the through hole in the drill rod of the central drilling tool; when drilling, the expanding bit automatically opens under the action of a hydraulic system, so that the effective outer diameter of the expanding bit is larger than the maximum outer diameters of the pipe shoe and the steel well pipe, the expanding effect is achieved, and the smooth follow-up of the pipe shoe and the steel well pipe is ensured.
The utility model relates to a cobble stratum pipe well precipitation becomes well's theory of operation does: compressed air enters a down-the-hole hammer through a drill rod, a piston of the down-the-hole hammer impacts a guider of a pipe following drilling tool, the guider transmits impact waves and bit pressure to a hole expanding drill bit and a center drill bit to crush soil bodies, meanwhile, the drilling tool drives the drill rod to rotate, the drill rod drives the down-the-hole hammer and the guider to rotate, the hole expanding drill bit and the center drill bit simultaneously rotate along with the guider, and meanwhile, muck enters a gap between the drill rod and a steel well pipe through the drilling tool and is discharged out of the hole by high-pressure airflow; and when drilling is finished, the reaming drill bit is furled by the hydraulic system, the maximum outer diameters of the reaming drilling tool and the central drilling tool are ensured to be smaller than the inner diameters of the pipe shoe and the steel well pipe, so that the drilling tool is taken out smoothly, and the steel well pipe is remained in the stratum. In addition, the steel well pipe is provided with water seepage pores, and the width, the length, the interval and the arrangement mode of the pores are set according to different geological conditions, so that clogging and fine particle loss are effectively prevented.
Steel well pipe and pipe shoe between adopt threaded connection (the steel well pipe lower extreme sets up the internal thread, pipe shoe upper end sets up the external screw thread) or welding, if the steel well pipe leans on the dead weight to sink when the difficulty, can rely on down-the-hole hammer drilling force to drive pipe shoe, pipe shoe drives the steel well pipe again and sinks into.
Technical scheme can reach following effect:
(1) compared with the traditional well completion process, the down-the-hole hammer drilling technology has the advantages of high drilling efficiency, small construction occupied area, low noise and the like, and is more suitable for urban construction with nervous land;
(2) the utility model discloses the well completion technology adopts reaming and center drill, and when the steel well pipe followed the drill and crept into predetermined stratum together, can draw in the reaming drill in, makes the biggest external diameter of reaming and center drill be less than the internal diameter of pipe boot, steel well pipe, takes out the drilling tool from the steel well pipe, and the steel well pipe then stays and forms the well casing in the stratum, need not to go down the well casing once more, improves well completion efficiency greatly;
(3) the hole wall is effectively protected by the following steel well pipe, the hole collapse problem is solved, mud is not needed for wall protection, and the cost is saved;
(4) the opening parameters (such as the width, the length, the spacing and the arrangement type of pores) of the water passing section of the steel well pipe can be determined according to specific stratums and are flexible and changeable, so that the precipitation requirement of the complex stratums is met.
(5) Utilize to pull out equipment to dial out after accomplishing the precipitation operation, steel pipe recycle, green.
The applicant needs to particularly state that: the drilling machine, the drill rod, the down-hole hammer and the pilot device mentioned in the utility model are all common accessories in the prior well drilling equipment, and the utility model has no special design; to reaming drilling tool and central drilling tool, the utility model discloses improve on the basis of present common reaming drilling tool and central drilling tool, through set up the hydraulic stem on the drilling rod of central drilling tool, and the hydraulic stem is articulated with the reaming drill bit of reaming drilling tool to and the reaming drill bit of reaming drilling tool is connected with the reaming drilling tool body is articulated, and has increased hydraulic system, hydraulic system utilizes the inside through-hole that exists of present drilling rod to form hydraulic line and supplies pressure with the hydraulic stem on the drilling rod of central drilling tool, through hydraulic pressure change, realizes that the hydraulic stem drives the expansion of reaming drill bit and draws in. Because the connected mode of conventional drill bit that reaming drilling tool and central drilling tool still adopted, and, the rig, drilling rod, down-the-hole impacter, leading positive ware and pipe shoe that adopt all are conventional equipment, consequently, among this technical scheme, do not carry out the detailed structure and the connected mode to each parts such as concrete rig, drilling rod, down-the-hole impacter, leading positive ware, pipe shoe, steel well pipe and hydraulic system and describe in detail. In addition, the reamer and the core drill are improvements of the existing drill, as described in the foregoing, and therefore the connection of the reamer and the core drill to the down-the-hole hammer and to each other is not described in detail, since the applicant's specific connection is well known to those skilled in the art.
The applicant believes that, an application of pebble stratum pipe well precipitation well-completion device has solved the low, with high costs and the difficult scheduling problem of guaranteeing of quality of pipe well efficiency of construction, the well-completion device under this kind of pebble stratum condition adopts down-the-hole hammer pore-forming, follow-up steel well pipe well-completion, equipment occupation of land scope is little, well-completion time is short, and need not the mud dado, need not well-flushing alone, accomplish well-completion when boring to the design degree of depth promptly, well-completion efficiency is greatly improved, reduce construction cost and satisfy precipitation design index.
The pebble stratum pipe well dewatering well completion device provided by the utility model is introduced in detail, the principle and the implementation mode of the device are explained by applying the embodiment, and the explanation of the embodiment is only used for helping to understand the core idea of the device; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (8)
1. The utility model provides a gravel stratum pipe well precipitation well-completion device which characterized in that: the dewatering well completion device comprises a drilling machine, a drill rod, a down-hole impactor, a guider, a hole expanding drilling tool, a central drilling tool, a pipe shoe, a steel well pipe and a hydraulic system;
the drilling machine is connected with a drill rod, the other end of the drill rod is provided with a down-the-hole impactor, the other end of the down-the-hole impactor is provided with a guider, the other end of the guider is provided with a hole expanding drilling tool, a central axis of the hole expanding drilling tool is provided with a through hole, and the central drilling tool penetrates through the through hole of the hole expanding drilling tool and then is connected to the down-the-hole impactor;
the pipe shoe is arranged on the outer side of the reaming drilling tool, and a plurality of steel well pipes are vertically and sequentially welded at the upper end of the pipe shoe;
the reaming drilling tool comprises a reaming drilling tool body and two reaming bits, and the reaming bits are hinged to the bottom end face of the reaming drilling tool body; two hydraulic rods are arranged on a drill rod of a central drilling tool at the lower end of the reaming drilling tool body, and the positions of the hydraulic rods on the drill rod of the central drilling tool and the fixed positions of the reaming bit and the reaming drilling tool body are on the same straight line;
the hydraulic system comprises a hydraulic pump and a hydraulic pipeline, and the hydraulic pipeline consists of a drill rod, a down-the-hole hammer and a through hole in the drill rod of the central drilling tool; hydraulic oil in the hydraulic pump is pumped into the hydraulic rod through the drill rod, the down-the-hole impacter and the through hole in the drill rod of the central drilling tool;
the reaming bit is expanded and furled through the stretching of the hydraulic rod, and the end head of the hydraulic rod is hinged with the reaming bit.
2. The pebble formation pipe well precipitation well completion device of claim 1, wherein: the steel well pipe is placed in a well mouth as a well wall, and a plurality of water seepage pores are arranged on the pipe wall of the steel well pipe.
3. The pebble formation pipe well precipitation well completion device of claim 2, wherein: the water seepage pores are in a strip shape or a round shape or a square shape.
4. The pebble formation pipe well precipitation well completion device of claim 1, wherein: the steel well pipe at the bottommost end of the well wall is in threaded connection with the pipe shoe or is welded and fixed with the pipe shoe.
5. The pebble formation pipe well precipitation well completion device of claim 1, wherein: the diameter of the drill bit of the central drilling tool and the diameter of the furled expanding drilling tool are both smaller than the inner diameter of the pipe boot and the inner diameter of the steel well pipe, and the working diameter of the two expanded expanding drill bits is larger than the diameter of the steel well pipe.
6. The pebble formation pipe well precipitation well completion device of claim 1, wherein: the hydraulic rod is multi-stage telescopic.
7. The pebble formation pipe well precipitation well completion device of claim 1, wherein: and a protruding structure is arranged at the contact position of the inner wall of the pipe boot and the bottom end of the guide device.
8. The pebble formation pipe well precipitation well completion device of claim 1, wherein: the horizontal plane included angle of the two expanding drill bits of the expanding drilling tool is 180 degrees.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920545696.4U CN209976470U (en) | 2019-04-22 | 2019-04-22 | Gravel stratum pipe well dewatering well completion device |
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| CN201920545696.4U CN209976470U (en) | 2019-04-22 | 2019-04-22 | Gravel stratum pipe well dewatering well completion device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109930993A (en) * | 2019-04-22 | 2019-06-25 | 北京城建勘测设计研究院有限责任公司 | A kind of pebble layer tube well dewatering well formation device and construction method |
| CN112983274A (en) * | 2021-03-09 | 2021-06-18 | 中国石油大学(华东) | Rotary guide type two-stage down-the-hole hammer drill |
| CN113187381A (en) * | 2021-03-19 | 2021-07-30 | 中基发展建设工程有限责任公司 | High-water-length spiral well forming construction process |
| CN113236128A (en) * | 2021-05-19 | 2021-08-10 | 四川省地质矿产勘查开发局成都水文地质工程地质队 | Geothermal well drilling well forming device and construction process thereof |
-
2019
- 2019-04-22 CN CN201920545696.4U patent/CN209976470U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109930993A (en) * | 2019-04-22 | 2019-06-25 | 北京城建勘测设计研究院有限责任公司 | A kind of pebble layer tube well dewatering well formation device and construction method |
| CN112983274A (en) * | 2021-03-09 | 2021-06-18 | 中国石油大学(华东) | Rotary guide type two-stage down-the-hole hammer drill |
| CN112983274B (en) * | 2021-03-09 | 2023-03-14 | 中国石油大学(华东) | Rotary guide type two-stage down-the-hole hammer drill |
| CN113187381A (en) * | 2021-03-19 | 2021-07-30 | 中基发展建设工程有限责任公司 | High-water-length spiral well forming construction process |
| CN113187381B (en) * | 2021-03-19 | 2023-11-21 | 中基发展建设工程有限责任公司 | High-water-level long-spiral well formation construction process |
| CN113236128A (en) * | 2021-05-19 | 2021-08-10 | 四川省地质矿产勘查开发局成都水文地质工程地质队 | Geothermal well drilling well forming device and construction process thereof |
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