CN110778311A - Pressure testing device before drilling and grouting in drilling engineering - Google Patents
Pressure testing device before drilling and grouting in drilling engineering Download PDFInfo
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- CN110778311A CN110778311A CN201911194188.7A CN201911194188A CN110778311A CN 110778311 A CN110778311 A CN 110778311A CN 201911194188 A CN201911194188 A CN 201911194188A CN 110778311 A CN110778311 A CN 110778311A
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- drilling
- neck
- grouting
- drill rod
- pressure
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- 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
- E21B47/06—Measuring temperature or pressure
Abstract
The invention relates to a pressure test device before drilling and grouting in drilling engineering, which comprises a sealing cover, a device neck, a device sleeve and at least three alloy gaskets, wherein the sealing cover is arranged on the device neck; the lower end of the sealing cover is provided with an external thread which is connected with an internal thread of the neck opening of the device; the neck of the device is fixed at the upper end of the device sleeve, and the diameter of the neck of the device is larger than that of the device sleeve; the alloy gasket is attached to the top of the drill rod and placed on the inner wall of the neck opening of the device, and the alloy gasket is used for clamping the top of the drill rod; the side of the device sleeve is used for welding straight-through joints with different diameters. The invention has simple structure and convenient processing, solves the problem of tripping and drilling caused by the sectional grouting in the existing drilling engineering, improves the construction efficiency, reduces the construction cost, reduces the investment of manpower and material resources, further ensures the construction safety, has various using methods, is simple to operate, is easy to operate, and can obviously improve the working efficiency of engineering personnel.
Description
Technical Field
The invention relates to the technical field of grouting in drilling engineering, in particular to a pressure testing device before drilling and grouting in drilling engineering.
Background
Along with the development and utilization of underground resources, drilling engineering is applied to various fields, such as petroleum, shale gas, coal bed gas exploitation, mine disaster treatment and the like, and is a better happy life for people. When grouting the stratum, in order to better optimize the grouting effect, the sectional grouting process is one of the preferred methods, and the method comprises the steps of completely starting up drilling tools in the hole after drilling for a certain distance, connecting a grouting station at the hole opening for grouting, then drilling down for hole cleaning and drilling to the next grouting section, and continuously circulating the processes until the designed hole depth is reached.
The sectional grouting method has the following problems: actual construction shows that when stratum is grouted, some regional cracks develop and some regional cracks do not develop, so that grouting is not performed in the regions meeting the designed grouting pressure; but the area can not be judged whether to accord with grouting pressure, after the drilling tool is required to be completely started, the drilling tool is connected with a grouting station to carry out pressurized-water pressure test, and then whether grouting is required is judged according to the pressure; along with the continuous increase of the hole depth, the drilling tool is continuously lengthened, so that the time consumed by the drill tripping and the drill tripping in the process is gradually increased, and meanwhile, the physical strength of engineering personnel, the waste of materials and the abrasion of equipment are increased; and even increase the risk of drilling accidents.
Disclosure of Invention
The present invention aims to solve the above-mentioned disadvantages of the prior art.
In order to achieve the aim, the invention provides a pressure testing device before drilling and grouting in drilling engineering, which comprises a sealing cover, a device neck, a device sleeve and at least three alloy gaskets, wherein the sealing cover is arranged on the device neck; the lower end of the sealing cover is provided with an external thread which is connected with an internal thread of the neck opening of the device; the neck of the device is fixed at the upper end of the device sleeve, and the diameter of the neck of the device is larger than that of the device sleeve; the alloy gasket is attached to the top of the drill rod and placed on the inner wall of the neck opening of the device, and the alloy gasket is used for clamping the top of the drill rod; the side of the device sleeve is used for welding straight-through joints with different diameters.
In one possible embodiment, a bottom protective cover is also attached to the bottom end of the device sleeve.
In one possible embodiment, the thread on the inside of the bottom protective cover can be screwed on the thread on the lower end of the device sleeve, and the inside of the bottom protective cover is a plastic protective layer.
In one possible embodiment, the lower end of the sealing cover is engraved with a thread groove, and the thread groove is wrapped with a raw adhesive tape.
In one possible embodiment, the upper end of the sealing cap is at the weld nut.
In one possible embodiment, the device neck is welded to the device sleeve upper end.
In one possible embodiment, a pulling rope is provided on the alloy shim.
In one possible embodiment, the device neck inner diameter is greater than the drill pipe top diameter and the alloy shim thickness is greater than the difference between the drill pipe top diameter and the drill pipe diameter.
In one possible embodiment, the length of the device cannula ranges from 1 to 1.5 m.
In one possible embodiment, the middle position of the through joint is connected with a pressure gauge.
The invention has the following beneficial effects:
(1) the invention has simple structure and convenient processing, solves the problem of tripping and drilling caused by the sectional grouting in the existing drilling engineering, improves the construction efficiency, reduces the construction cost, reduces the investment of manpower and material resources and further ensures the construction safety.
(2) The invention has various using methods, simple operation and easy operation, and can obviously improve the working efficiency of engineering personnel.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a pressure testing device before grouting in a drilling project according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an alloy gasket according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a sealing cover according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a bottom protection cover according to an embodiment of the present invention;
description of the reference numerals
1-sealing cover, 2-device neck, 3-alloy gasket, 4-pressure gauge, 5-straight joint, 6-device sleeve, 7-hole, 8-portable nut, 9-lifting rope, 10-bottom protective cover, 11-protective cover plastic protective layer and 12-drill rod.
Detailed Description
The terms "first," "second," and the like in the description and in the claims and in the drawings of the present invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises" and "comprising," as well as any variations thereof, are intended to cover a non-exclusive inclusion, such as a list of steps or elements. A method, system, article, or apparatus is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, system, article, or apparatus.
In order to make up for the technical defects, the invention provides a pressure test device before drilling and grouting in drilling engineering and a use method thereof, when the existing drilling engineering carries out segmented grouting on stratum fractures, a drilling tool can be taken to carry out water pressure test, and whether grouting is needed or not is judged according to pressure; the problem of engineering waste caused by tripping and tripping is directly solved.
The technical solution of the present invention is further described in detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1-4, the pressure testing device before grouting for a drilling hole in a drilling project according to the embodiment of the invention comprises a sealing cover 1, a device neck 2, a device sleeve 6, a bottom protective cover 10 and at least three alloy gaskets 3.
The lower end of the sealing cover 1 is provided with an external thread which is connected with an internal thread of the neck opening 2 of the device; the device neck 2 is fixed at the upper end of the device sleeve 6, and the diameter of the device neck 2 is larger than that of the device sleeve 6.
The alloy gasket 3 is attached to the top of the drill rod 12 and placed on the inner wall of the device neck 2, and the top of the drill rod 12 is located on the alloy gasket 3.
The side part of the device casing 6 is used for welding the through joints 5 with different diameters, when the grouting pipe diameter changes, the welded through joint 5 is removed, then the through joint 5 which accords with the current pipe diameter is welded, comprehensively speaking, the through joints with different diameters can be welded and removed, and the bottom protective cover 10 is screwed at the bottom end of the device casing 6.
In one example, a thread groove is carved on the lower end of the sealing cover 1, and the thread groove is wrapped with a raw adhesive tape, so that the sealing performance can be effectively ensured during actual construction.
In one example, the upper end of the seal cap 1 is at a weld nut 8 to facilitate installation and removal of the seal cap 1 from the device neck finish 2.
In one example, the device neck 2 is welded to the device sleeve 6 at the upper end thereof, and the application is not further limited as to the manner of attachment of the device neck 2 to the device sleeve 6.
In one example, the alloy pad 3 is attached to the top of the drill pipe 12 and provided with a lifting rope 9, so that the alloy pad 3 is convenient to mount and dismount.
In one example, the diameter of the device neck 2 is matched with the diameter of a drill rod, and can be divided into a plurality of grades, particularly according to the diameters of the drill rods, common drilling engineering drill rod diameters are divided into four grades of 50mm, 89mm, 114mm and 126mm, for this purpose, the diameter of the device neck 2 is divided into A, B, C, D grades, and the device necks 2 of different grades can be detached or welded at the upper end of the device sleeve 6. In the embodiment, a grade B device neck 2 (corresponding to a drill rod with the diameter of 89 mm) is selected for explanation.
The alloy gaskets 3 are 3, 4 or N pieces, completely surround the drill rod, 3 pieces are preferably selected, the alloy gaskets are also classified into four grades A1, B1, C1 and D1 according to grading matching of the neck opening 2 of the device and the diameter of the drill rod, and the alloy gasket 3 of the grade B1 is selected for explanation in the embodiment. And calculating the total weight of all drilling tools according to the compressive data of the alloy steel in the laboratory, wherein the compressive strength of the alloy material selected by the alloy gasket 3 is greater than the total weight of the drilling tools in the engineering, and the inclination angle of the upper part of the alloy gasket 3 is consistent with the inclination angle of the top of the drill rod.
In one example, the inner diameter of the device neck 2 is larger than the diameter of the top of the drill rod, and the thickness of the alloy gasket 3 is larger than the difference between the diameter of the top of the drill rod and the diameter of the drill rod, so as to prevent the top of the drill rod from directly falling into the device casing 6, and if the drill rod has no diameter-variable top, the drilling tool is clamped on the device by connecting the drill rod through joint. The existing drill rods are of various types, for example, a drill rod with the diameter of 89mm (the drill rod belongs to the drill rod with the diameter of two ends being large and the diameter of the rod part being small) is 114mm (the outer diameter is constant), the device is used for clamping the drilling tool on a wellhead, and if the drill rod with the diameter of 114mm is adopted, a joint with the outer diameter of more than 114m is additionally arranged at the upper part, and the field is called a straight joint. The clamping of the drilling tool on the device can be realized.
In one example, the length of the device sleeve 6 ranges from 1 m to 1.5m, the upper end of the device sleeve is welded with the neck 2 of the device, the lower end of the device sleeve is connected with the bottom protective cover 10, and the side part of the device sleeve 6 is welded with the through joint 5 with different diameters, so that the device sleeve can be connected with grouting pipe heads with different specifications. And the middle part of the straight joint 5 welded on the side part of the device pipe is connected with a pressure gauge 4, so that the pressure of the orifice can be effectively read during actual work.
In one example, the inner threads of the bottom protective cover 10 can be screwed onto the threads of the lower end of the device sleeve 6; inside is plastic protection layer 11, and plastic protection layer 11 intensity is greater than the weight of alloy gasket, can reduce bottom visor weight, makes things convenient for visor dismantlement, installation, can guarantee again that pressure testing device is in the transportation, and the alloy gasket of putting in inside does not roll off and loses.
The use of the above-described device is further illustrated below with reference to three examples.
Example one
Step one, before drilling, a pressure testing device with the sealing cover 1 and the bottom protective cover 10 removed is connected with the hole opening 7.
And step two, after the drilling work is finished, attaching the B1-grade alloy gasket 3 to a drill rod with the diameter of 89mm, slowly sliding the drill rod to the inside of the neck opening 2 of the device, and then slowly seating the top of the whole drill rod and the whole drilling tool on the alloy gasket 3.
And step three, screwing the sealing cover 1 on the neck 2 of the pressure testing device and sealing, connecting the head of the grouting pipe on a straight joint 5 at the side part of the pressure testing device and sealing, installing a pressure gauge 4, checking whether each joint is stable, and starting a grouting pump to perform pressure pressing and pressure testing.
Example two
Step one, a hydraulic clamp or a hanging clamp of the drilling machine is used for clamping the position, 1.5-2m away from the top end, of the last drill rod.
And step two, disassembling the power head of the drilling machine, and sleeving the pressure testing device with the sealing cover 1 and the bottom protective cover 10 removed on the exposed drill rod.
And step three, screwing the power head of the drilling machine on the drill rod, hoisting the drilling tool completely, and slowly sliding the pressure testing device down to the hole opening 7 and connecting and fixing the pressure testing device.
And step four, attaching the B1-grade alloy gasket 3 on a drill rod with the diameter of 89mm, slowly sliding the drill rod down to the inside of the neck opening 2 of the device, and then slowly seating the top of the whole drill rod and the whole drilling tool on the alloy gasket 3.
And fifthly, screwing the sealing cover 1 on the neck 2 of the pressure testing device and sealing, connecting the head of the grouting pipe on a straight joint 5 at the side part of the pressure testing device and sealing, installing a pressure gauge 4, checking whether each joint is stable, and starting a grouting pump to perform pressure pressing and pressure testing.
EXAMPLE III
Step one, after drilling, the last drill rod of the drilling tool is taken out, and the rest drilling tools are clamped on an operation table.
And step two, sleeving the pressure test device with the sealing cover 1 removed and the bottom protective cover 10 from the bottom end of the last drill rod, connecting the drill rods to the drilling tool, and completely hoisting the drilling tool at the moment.
And step three, slowly sliding the pressure testing device down to the orifice 7 and connecting and fixing the pressure testing device.
And step four, attaching the B1-grade alloy gasket 3 on a drill rod with the diameter of 89mm, slowly sliding the drill rod down to the inside of the neck opening 2 of the device, and then slowly seating the top of the whole drill rod and the whole drilling tool on the alloy gasket 3.
And fifthly, screwing the sealing cover 1 on the neck 2 of the pressure testing device and sealing, connecting the head of the grouting pipe on a straight joint 5 at the side part of the pressure testing device and sealing, installing a pressure gauge 4, checking whether each joint is stable, and starting a grouting pump to perform pressure pressing and pressure testing.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the scope of the present invention, and any modification, improvement, etc. made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.
Claims (10)
1. A pressure test device before drilling and grouting in drilling engineering is characterized by comprising a sealing cover (1), a device neck (2), a device sleeve (6) and at least three alloy gaskets (3);
the lower end of the sealing cover (1) is provided with an external thread which is connected with an internal thread of the neck opening (2) of the device; the device neck (2) is fixed at the upper end of the device sleeve (6), and the diameter of the device neck (2) is larger than that of the device sleeve (6);
the alloy gasket (3) is attached to the top of the drill rod and placed on the inner wall of the device neck (2), and the alloy gasket (3) is used for clamping the top of the drill rod;
the side of the device sleeve (6) is used for welding straight-through joints (5) with different diameters.
2. The device for testing the pressure in the drilling engineering before grouting according to claim 1, characterized in that a bottom protective cover (10) is further connected to the bottom end of the device casing (6).
3. The device for testing the pressure in the drilling engineering before grouting according to claim 2, characterized in that the threads on the inner side of the bottom protective cover (10) can be screwed on the threads at the lower end of the device casing (6), and the inside of the bottom protective cover (10) is provided with a plastic protective layer (11).
4. The device for testing the pressure before grouting in the drilling engineering according to claim 1, wherein a thread groove is carved at the lower end of the sealing cover (1), and the thread groove is wrapped with a raw adhesive tape.
5. The device for testing pressure before grouting in a drilling engineering borehole according to claim 1, characterized in that the upper end of the sealing cover (1) is at a welding nut (8).
6. The pressure testing device before drilling and grouting of the drilling engineering according to claim 1, characterized in that the device neck (2) is welded at the upper end of the device casing (6).
7. The device for testing the pressure before grouting in the drilling engineering according to claim 1, characterized in that a pulling-up rope (9) is arranged on the alloy gasket (3).
8. The device for testing pressure before grouting in a drilling engineering borehole is characterized in that the inner diameter of a neck (2) of the device is larger than the diameter of the top of a drill rod, and the thickness of an alloy gasket (3) is larger than the difference value between the diameter of the top of the drill rod and the diameter of the drill rod.
9. The device for testing pressure before grouting in a borehole of a drilling project according to claim 1, characterized in that the length of the device casing (6) is in the range of 1-1.5 m.
10. The pressure testing device before drilling and grouting in drilling engineering according to claim 1, characterized in that the middle position of the through joint (5) is connected with a pressure gauge (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911194188.7A CN110778311A (en) | 2019-11-28 | 2019-11-28 | Pressure testing device before drilling and grouting in drilling engineering |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911194188.7A CN110778311A (en) | 2019-11-28 | 2019-11-28 | Pressure testing device before drilling and grouting in drilling engineering |
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| Publication Number | Publication Date |
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| CN110778311A true CN110778311A (en) | 2020-02-11 |
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| CN201911194188.7A Pending CN110778311A (en) | 2019-11-28 | 2019-11-28 | Pressure testing device before drilling and grouting in drilling engineering |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111502596A (en) * | 2020-05-20 | 2020-08-07 | 陕西正通煤业有限责任公司 | Extrusion device for replacing slurry during drilling and water pressing and construction process |
-
2019
- 2019-11-28 CN CN201911194188.7A patent/CN110778311A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111502596A (en) * | 2020-05-20 | 2020-08-07 | 陕西正通煤业有限责任公司 | Extrusion device for replacing slurry during drilling and water pressing and construction process |
| CN111502596B (en) * | 2020-05-20 | 2024-03-12 | 陕西正通煤业有限责任公司 | Extrusion device for drilling and grouting replacement and construction process |
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