CN212774193U - Slag discharge device for reverse circulation drilling - Google Patents
Slag discharge device for reverse circulation drilling Download PDFInfo
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- CN212774193U CN212774193U CN202021102086.6U CN202021102086U CN212774193U CN 212774193 U CN212774193 U CN 212774193U CN 202021102086 U CN202021102086 U CN 202021102086U CN 212774193 U CN212774193 U CN 212774193U
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Abstract
A slag discharging device for reverse circulation drilling comprises a slag discharging body and a central body, wherein the slag discharging body is in a short cylindrical shape, the central body penetrates through the slag discharging body and is in rotating fit with the slag discharging body; the central body is internally provided with an inner plug which seals the upper part of the central body, the side wall of the central body is provided with a central body air passage, the upper part of the inner plug is provided with an inner plug air passage communicated with the central body air passage, the middle part of the central body is provided with a side window communicated with the annular cavity. Ordinary unit head rig and carousel rig installation the utility model discloses the device can be used for heavy-calibre reverse circulation well drilling construction, improvement efficiency of construction that can be very big, reduction in production cost. The utility model discloses not only be suitable for the little unit head rig of latus rectum, also can be used to the rotary table rig of oil drilling, engineering well drilling.
Description
Technical Field
The utility model relates to a rig part, especially reverse circulation creeps into with arranging sediment device.
Background
The reverse circulation drilling is a drilling method in which flushing medium flows to the bottom of a hole from an annular space between a drilling tool and the wall of the hole, carries rock debris and returns to the ground surface from an inner hole of the drilling tool. The small-caliber gas lift reverse circulation drilling technology utilizes drilling equipment (such as a power head drilling machine and a rotary table drilling machine) to drill a small-caliber deep well and an exploration well by adopting a reverse circulation drilling technology, and is an advanced drilling technology at present. The slag discharging mode is that compressed air is delivered to a mixing chamber in a drilling tool through an air supply pipe, an air box and an annular space of a double-wall drill rod by an air compressor, then the compressed air enters an inner pipe of the double-wall drill rod to be mixed with flushing fluid and rock debris and rock powder in the inner pipe to form a mixture with specific gravity smaller than that of the flushing fluid, the pressure of a liquid column in the drill rod is reduced, pressure difference is formed inside and outside the drill rod, the mixture in the drill rod rises under the action of flushing hydraulic pressure outside the drill rod column, the mixture passes through a through hole of a power head (a faucet) and is delivered to a vibrating screen through a discharge hole of a slag discharge pipe, the rock debris and rock powder are separated by the vibrating. At present, the diameters of power heads of most power head drills and through holes of elbows on the upper parts and the through holes of water taps of rotary table drills are smaller, because in the reverse circulation construction with small diameter, the flow rate of upward returning mud-gas mixed liquid carrying rock debris is smaller, rock debris is less, if the reverse circulation drilling construction with large diameter is directly used, the power heads (water taps) are much smaller than the through holes of drill rods on the lower parts, the flow rate of the upward returning mud-gas mixed liquid carrying the rock debris at the power heads (water taps) is multiplied, the abrasion to the components of the power heads (water taps) is increased, and the blockage is easily caused. If the diameter of the through hole is increased, the power head (water faucet) of the drilling machine needs to be greatly changed, so that the difficulty is high, and the cost is high; in addition, when drilling a deep well in an oil field, if a reverse circulation drilling process is adopted, the abrasion to a mud manifold system is increased inevitably due to the fact that the flow rate of a gas-liquid mixture returning upwards in reverse circulation is too high, and therefore reverse circulation mud is forbidden to enter the mud manifold system in the oil field.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's drawback, provide a reverse circulation creeps into with arranging sediment device, adopts arrange the sediment device, under the condition that does not change current small-bore rig unit head or tap structure, can increase substantially and creep into efficiency.
The problem of the utility model is solved by the following technical scheme:
a slag discharging device for reverse circulation drilling comprises a slag discharging body and a central body, wherein the slag discharging body is in a short cylindrical shape, the central body penetrates through the slag discharging body and is in rotating fit with the slag discharging body; the inner plug is arranged in the central body, the inner plug seals the upper part of the central body, the side wall of the central body is provided with a central body air passage, the upper part of the inner plug is provided with an inner plug air passage communicated with the central body air passage, the middle part of the central body is provided with a side window, and the side window is communicated with the annular cavity.
The upper opening and the lower opening of the central body are respectively provided with a conical threaded hole, the upper opening of the central body is connected with a water tap of a rotary disc drilling machine or a power head of a power head drilling machine through an outer cone joint, the lower opening of the central body is connected with double-wall drill rods, and a central body air passage is communicated with an annular gap between the double-wall drill rods.
The slag discharging device for reverse circulation drilling is characterized in that the top of the inner plug is provided with a groove, four inner plugging air passages are uniformly distributed on the inner plug, the inlets of the inner plugging air passages are arranged on the wall of the groove, and the inner plugging air passages are obliquely arranged relative to the axial direction; the inner plug is provided with a buffer chamber, the buffer chamber is in butt joint with an inner hole of the central body, and a sealing ring is arranged between the lower part of the inner plug and the central body.
The deslagging device for reverse circulation drilling is characterized in that the central body is provided with two side windows.
The slag discharging device for reverse circulation drilling is characterized in that bearings are arranged between the upper portion and the lower portion of the slag discharging body and the central body, end covers are arranged at the outer ends of the bearings, and sealing rings are arranged between the end covers and the central body.
The utility model discloses the device will mix the liquid and arrange the cinder notch from the side of arranging the sediment device, no longer through unit head (tap), unit head (tap) have only realized gas-liquid separation as inlet channel. The device can greatly increase the slag discharge amount, improve the slag discharge speed, solve the problems of abrasion and blockage of the upper back mixed liquid on the power head (water faucet) component and the like in large-caliber drilling construction on the premise of not changing the existing drilling equipment, and improve the drilling efficiency. At present a large amount of ordinary unit head rigs and carousel rig adopt the utility model discloses can be used for heavy-calibre reverse circulation well drilling construction behind the device, improvement efficiency of construction that can be very big, reduction in production cost. The utility model discloses not only be suitable for the little unit head rig of latus rectum, also can be used to the rotary table rig of oil drilling, engineering well drilling.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
Fig. 1 is a schematic structural view (a-a cross-sectional view of fig. 2) of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the inner plug;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a schematic view of the present invention used with a power head drill;
fig. 6 is a schematic diagram of the rotary drilling rig according to the present invention.
The reference numbers in the figures are: 1. a central body; 1-1 parts of central body air passage, 1-2 parts of side window, 2 parts of inner plug, 2-1 parts of inner plug air passage, 3 parts of end cover, 4 parts of bearing, 5 parts of slag discharging body, 5-1 parts of annular cavity, 6 parts of slag discharging port, 7 parts of double-wall drill rod, 7-1 parts of annular gap, 8 parts of outer cone joint, 9 parts of power head drilling machine, 10 parts of rotary table drilling machine.
Detailed Description
Referring to fig. 1-4, the utility model comprises a slag discharging body 5 and a central body 1, wherein the slag discharging body is in the shape of a short cylinder, the central body is in the shape of a hollow cylinder, the central body passes through the slag discharging body, and the slag discharging body and the central body are in running fit. The upper opening and the lower opening of the central body are respectively provided with a conical threaded hole, the upper opening of the central body can be connected with a drilling machine through an outer conical joint 8, and the lower opening of the central body is connected with a double-wall drill rod 7. The slag discharging body is of a cavity structure, an annular cavity 5-1 is formed between the central body and the slag discharging body, the slag discharging body is provided with a slag discharging port 6, the slag discharging port is located on the side portion of the slag discharging body along the tangential direction, and the slag discharging port is communicated with the annular cavity of the slag discharging body. An inner plug 2 is arranged in the central body, the inner plug seals the upper part of the inner hole of the central body, and a mud-gas mixed liquid ascending channel is sealed by the inner plug. Two side windows 1-2 are arranged in the middle of the central body, the side windows are communicated with the annular cavity, and upward return mud-gas mixed liquid carrying rock debris in an inner hole of the double-wall drill rod is discharged from the slag discharging body and the slag discharging port. The side wall of the central body is provided with central body gas passages 1-1 for conveying gas. The inner plug is provided with an inner plug air passage 2-1, the top of the inner plug is provided with a groove, four inner plug air passages are uniformly distributed on the inner plug, the inlet of each inner plug air passage is arranged on the wall of the groove, and the inner plug air passages are obliquely arranged relative to the axial direction. Each internal gas blocking passage corresponds to a central body gas passage respectively, and the central body gas passages are communicated with an annular gap 7-1 between the double-wall drill rods. The structure conveys gas from the upper opening of the central body to the annular gap of the double-wall drill pipe. The inner plug is provided with a buffer chamber 2-2, the buffer chamber is in butt joint with an inner hole of the central body, and the diameter of the buffer chamber is matched with the diameter of the inner hole of the central body. A buffer chamber is provided where the upstream fluid can be buffered. The lower part of the inner plug is tightly matched with the central body and is provided with a sealing ring for sealing. Bearings are arranged between the upper and lower parts of the deslagging body and the central body so as to reduce the rotating friction, end covers 3 are arranged at the outer ends of the bearings, and sealing rings are arranged between the end covers and the central body.
Referring to fig. 5 and 6, the utility model discloses install between the unit head of unit head rig 9 and the double-walled drilling rod during the use, or install between the tap of carousel rig 10 and the double-walled drilling rod, the unit head of rig or tap inlet port are as the inlet channel that the reverse circulation creeps into, and the side is arranged sediment device and is regarded as the escape route of going back the drilling fluid, realizes the sediment gas separation. Therefore, the problem that the power head or the tap through hole is too small to be blocked easily can be avoided, and slag can be discharged smoothly with high efficiency.
The working principle of the utility model is as follows: high-pressure air enters the slag discharging device through a center hole of the power head (a faucet) and enters an inner annular gap and an outer annular gap of the double-wall drill rod through a central body air passage and an inner blocking air passage; the solid-gas-liquid mixed liquid returning upwards in the drilling tool enters the annular cavity of the slag discharging body from the side window of the central body; because the central body rotates to generate centrifugal force, the fluid in the vertical direction is converted into rotating fluid in the horizontal direction, and the discharging speed of the fluid is accelerated through rotation, so that the solid-gas-liquid mixed liquid enters the slag discharging port in an accelerated manner and is discharged from the slag discharging port.
The utility model is used for behind traditional unit head rig or the carousel rig, mix liquid no longer through unit head (tap) discharge, unit head (tap) have only realized gas-liquid separation as inlet channel, and greatly increased arranges the sediment volume, has improved row's sediment speed, has solved the wear and tear of middle and upper liquid returning to unit head (tap) part in the heavy-calibre construction and has blockked up difficult problems under the prerequisite that does not change current drilling equipment, has improved drilling efficiency.
Claims (5)
1. The utility model provides a sediment device is arranged with boring to reverse circulation which characterized in that: the slag discharging device comprises a slag discharging body (5) and a central body (1), wherein the slag discharging body is in a short cylindrical shape, the central body penetrates through the slag discharging body and is in rotating fit with the slag discharging body, the central body is in a hollow structure, the slag discharging body is in a cavity structure, an annular cavity (5-1) is formed between the central body and the slag discharging body, the slag discharging body is provided with a slag discharging port (6), the slag discharging port is positioned at the side part of the slag discharging body along the tangential direction, and the slag discharging port is communicated with the annular cavity of the slag discharging; an inner plug (2) is arranged in the central body, the inner plug seals the upper part of the central body, a central body air passage (1-1) is arranged on the side wall of the central body, an inner plug air passage (2-1) communicated with the central body air passage is arranged on the upper part of the inner plug, a side window (1-2) is arranged in the middle of the central body, and the side window is communicated with the annular cavity.
2. The slag discharge device for reverse circulation drilling according to claim 1, wherein: the upper opening and the lower opening of the central body are respectively provided with a conical threaded hole, the upper opening of the central body is connected with a water tap of a rotary table drilling machine or a power head of a power head drilling machine through an outer conical joint, the lower opening of the central body is connected with double-wall drill rods (7), and a central body air passage is communicated with an annular gap (7-1) between the double-wall drill rods.
3. The slag discharge device for reverse circulation drilling according to claim 2, wherein: the top of the inner plug is provided with a groove, four inner gas blocking channels are uniformly distributed on the inner plug, the inlets of the inner gas blocking channels are arranged on the wall of the groove, and the inner gas blocking channels are obliquely arranged relative to the axial direction; the inner plug is provided with a buffer chamber (2-2), the buffer chamber is in butt joint with an inner hole of the central body, and a sealing ring is arranged between the lower part of the inner plug and the central body.
4. The slag discharge device for reverse circulation drilling according to claim 3, wherein: two side windows are provided on the central body.
5. The slag discharge device for reverse circulation drilling according to claim 4, wherein: bearings are arranged between the upper and lower parts of the slag discharging body and the central body, an end cover (3) is arranged at the outer end of each bearing, and a sealing ring is arranged between the end cover and the central body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021102086.6U CN212774193U (en) | 2020-06-15 | 2020-06-15 | Slag discharge device for reverse circulation drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021102086.6U CN212774193U (en) | 2020-06-15 | 2020-06-15 | Slag discharge device for reverse circulation drilling |
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| Publication Number | Publication Date |
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| CN212774193U true CN212774193U (en) | 2021-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021102086.6U Active CN212774193U (en) | 2020-06-15 | 2020-06-15 | Slag discharge device for reverse circulation drilling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837589A (en) * | 2022-05-07 | 2022-08-02 | 中国地质科学院勘探技术研究所 | A arrange stifled system for drilling of reverse circulation down-the-hole hammer |
-
2020
- 2020-06-15 CN CN202021102086.6U patent/CN212774193U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837589A (en) * | 2022-05-07 | 2022-08-02 | 中国地质科学院勘探技术研究所 | A arrange stifled system for drilling of reverse circulation down-the-hole hammer |
| CN114837589B (en) * | 2022-05-07 | 2023-10-20 | 中国地质科学院勘探技术研究所 | A row stifled system for reverse circulation down-the-hole hammer well drilling |
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