CN107237612B - Cleaning device for inner wall mud skin of rope coring drill rod - Google Patents
Cleaning device for inner wall mud skin of rope coring drill rod Download PDFInfo
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- CN107237612B CN107237612B CN201710406438.3A CN201710406438A CN107237612B CN 107237612 B CN107237612 B CN 107237612B CN 201710406438 A CN201710406438 A CN 201710406438A CN 107237612 B CN107237612 B CN 107237612B
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- scraper
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- drill rod
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- 238000004140 cleaning Methods 0.000 title claims abstract description 21
- 238000005520 cutting process Methods 0.000 claims abstract description 52
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 13
- 239000000523 sample Substances 0.000 claims abstract description 13
- 238000005553 drilling Methods 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 230000009471 action Effects 0.000 description 5
- 239000002002 slurry Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000007790 solid phase Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
A cleaning device for mud skins on the inner wall of a rope coring drill rod comprises a borehole diameter probe and a mud scraper, wherein the mud scraper consists of a reverse-torsion assembly and a cutting assembly which are connected with each other; the cutting assembly comprises a cutting motor, a cutting motor output shaft, a cutter frame and a scraper, the cutting motor is connected with the cutter frame, the scraper is installed on the cutter frame, the cutting motor rotates the scraper to open for working, and the cutting motor stops rotating the scraper to close. According to the invention, the inner diameter of the drill rod is continuously measured in the process of lowering the drill rod in the well to determine the position of the mud crust and the thickness of the mud crust, the mud scraper anti-torque assembly and the cutting assembly are sequentially started in the process of lifting, and the mud crust cleaning work is completed by mutual cooperation, so that the inner wall of the drill rod is kept clean, and the problem of core taking blockage caused by the mud crust is avoided.
Description
Technical Field
The invention relates to a cleaning device for the inner wall of a drill rod, in particular to a cleaning device for mud skin on the inner wall of a rope coring drill rod.
Background
The rope coring drilling has the outstanding advantages of good geological effect, high production efficiency, low drilling cost and the like, and is generally applied to geological drilling at home and abroad, but the rope coring has higher requirements on rheological property and solid phase control of slurry, and the slurry without solid phase is generally adopted. When complex strata such as loose, broken, leakage and the like are encountered, the wall building performance of solid-phase-free slurry is poor, the leakage amount is large, the problem of wall protection and leakage stoppage of a drilling hole cannot be solved, the solid-phase slurry is required to be used, so that the inner wall of a drill rod is always caused to generate mud skin, the inner diameter of the drill rod is reduced, the operation of a fisher and an inner pipe assembly in the drill rod is directly influenced, the putting of the fisher or the lifting and blocking of the inner pipe assembly are caused, and the construction efficiency is seriously influenced. The thickness of the mud skin on the inner wall of the drill rod is generally 2-3mm, sometimes exceeds 5mm, and becomes thinner from top to bottom, the drill rod catcher part is thicker, and the part for forming the mud skin is generally 40-60 meters at the upper part and generally does not exceed 80 meters. For the problem of mud skin on the inner wall of a drill rod, preventive measures such as uniformly stirring mud, strengthening mud solid control, regularly measuring mud performance and replacing mud, reducing rotation speed and the like are generally adopted, and the reduction of the rotation speed can greatly reduce the mechanical drilling speed. If the phenomenon of mud crust occurs, 6-8 vertical drill strings are generally proposed and then a fisher is put in to extract the rock core. Each drilling cycle requires part of the drill string to be lifted, which wastes construction time and causes the problem of instability of the drill hole wall due to repeated lifting and suction of the drill hole wall. At present, an effective device for solving the problem of mud skin on the inner wall of a rope drill rod is not available.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and fill the blank of the prior art, and provides a device for cleaning inner wall mud skin of a rope coring drill rod.
The problems of the invention are solved by the following technical scheme:
a cleaning device for mud skins on the inner wall of a rope coring drill rod comprises a borehole diameter probe and a mud scraper which are connected up and down, wherein the borehole diameter probe and the mud scraper are positioned in the rope coring drill rod, the mud scraper consists of an anti-torsion assembly and a cutting assembly which are arranged up and down and connected with each other, the anti-torsion assembly comprises an anti-torsion motor, a lead screw mechanism, a sliding cone and an anti-torsion contact, an output shaft of the anti-torsion motor drives a lead screw of the lead screw mechanism to rotate, the lead screw drives a screw nut and the screw nut to drive the sliding cone to move up and down, the anti-torsion contact is touched and pressed in the downward moving process of the sliding cone, and the anti-torsion contact is touched and pressed on the inner wall of the rope coring drill rod; the cutting assembly comprises a cutting motor, a cutting motor output shaft, a knife rest and a scraper, the cutting motor is connected with the knife rest through the cutting motor output shaft, the scraper is installed on the knife rest, the cutting motor rotating scraper is opened to work, and the cutting motor stopping scraper is closed.
According to the device for cleaning mud on the inner wall of the rope coring drill rod, the anti-torsion assembly is further provided with an anti-torsion motor cover, a sleeve, a sliding sleeve and an anti-torsion joint, the upper end of the sleeve is in threaded connection with the anti-torsion motor cover, the lower end of the sleeve is in threaded connection with the anti-torsion joint, the sliding sleeve is fixed in the sleeve, a screw nut is in sliding fit with the sliding sleeve, and the lower end of the screw nut is fixedly connected with a sliding cone; the anti-torsion joint is uniformly provided with anti-torsion contact mounting holes along the radial direction, the anti-torsion contacts are positioned in the anti-torsion contact mounting holes, and springs are arranged between the anti-torsion contacts and the anti-torsion contact mounting holes.
According to the device for cleaning mud on the inner wall of the rope coring drill rod, the cutting assembly is further provided with a cutting motor cover and a cutter holder, the upper end of the cutting motor cover is in threaded connection with the anti-torsion joint, the lower end of the cutting motor cover is in threaded connection with the cutter holder, and the cutter holder penetrates through the cutter holder; the scraper is provided with 2-4 scrapers, the upper end of each scraper is hinged with a cutter frame, the outer side edge part of each scraper is provided with a tooth-shaped edge, and the back part of the inner side of each scraper is provided with a magnet.
According to the device for cleaning mud skins on the inner wall of the rope coring drill rod, the borehole diameter probe and the mud scraper are connected through the reducer union, the armored cable is arranged on the upper portion of the borehole diameter probe and is connected with the winch through the pulley.
According to the device for cleaning mud on the inner wall of the rope coring drill rod, the anti-twisting contact is of a two-section combined structure, the buffer cushion is arranged between the two sections, the two ends of the anti-twisting contact are spherical, and the number of the anti-twisting contacts is 2-4.
The device can be used when the fishing tool is thrown and meets the blockage and the inner pipe assembly is lifted and blocked, and the mud skin on the inner wall of the drill rod is thoroughly removed, so that the fishing tool and the inner pipe assembly can smoothly run in the drill rod; the device can also be used periodically to check the mud skin condition on the inner wall of the drill rod, clean the mud skin in time and avoid the influence of the too thick mud skin on the coring operation. According to the invention, the inner diameter of the drill rod is continuously measured in the process of lowering the drill rod in the well to determine the position of the mud crust and the thickness of the mud crust, the mud scraper anti-torque assembly and the cutting assembly are sequentially started in the process of lifting, and the mud crust cleaning work is completed by mutual cooperation, so that the inner wall of the drill rod is kept clean, and the problem of core taking blockage caused by the mud crust is avoided. The invention has simple structure, stable and reliable operation of each part and convenient processing and manufacturing and field construction.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a schematic view of the working state of the present invention;
FIG. 2 is a schematic view of the scraper blade in an open state;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
fig. 4 is a schematic structural view of the scraper blade in a retracted state.
The reference numbers in the figures are: 1. the drilling machine comprises a reducer union, 2, a rope coring drill rod, 3, an anti-torsion motor cover, 4, an anti-torsion motor, 5, an anti-torsion motor output shaft, 6, a screw rod, 7, a sleeve, 8, a nut, 9, a sliding sleeve, 10, a pin shaft, 11, a sliding cone, 12, an anti-torsion joint, 13, a spring, 14, an anti-torsion contact, 15, a cushion pad, 16, a cutting motor cover, 17, a cutting motor, 18, a cutting motor output shaft, 19, a tool apron, 20, a tool rest, 21, a scraper, 22, a magnet, 23, a controller, 24, a winch, 25, a pulley, 26, an armored cable, 27, a well diameter carbon tube, 28, a mud scraper, 29 and a drill bit.
Detailed Description
Referring to figure 1, the present invention comprises a caliper 27 and a mud scraper 28 connected up and down, the caliper and scraper being located within the wireline coring bit 2 when the apparatus is in operation. The upper part of the borehole diameter probe is provided with an armored cable 26, and the armored cable is connected with a winch 24 through a pulley 25. The winch provides power for lowering and lifting the borehole diameter probe and the mud scraper and has two-stage speed regulation. The armored cable has functions of lifting well internal parts, transmitting data information, supplying power to the mud scraper and the like, the tensile strength of the armored cable exceeds the counter-torque force required by the work of the mud scraper, the armored cable is connected with the controller, the controller can display and record parameters such as depth, well diameter and winch lifting force, and the winch speed, the lifting of the well internal instrument and the start and stop of the mud scraper are controlled.
Referring to fig. 2-4, the scraper is a key component of the present invention, and is composed of an anti-twist assembly and a cutting assembly which are arranged up and down and connected with each other. The anti-twist assembly comprises an anti-twist motor 4, a screw mechanism, a sliding cone 11, a sleeve 7, a sliding sleeve 9, an anti-twist joint 12 and an anti-twist contact 14. The anti-torsion motor is a forward-reverse rotation low-speed large-torque motor, and is provided with an anti-torsion motor cover 3 and an anti-torsion motor output shaft 5. The screw mechanism is provided with a screw 6 and a nut 8 which are in threaded fit. The motor cover is turned round in the upper end threaded connection of sleeve 7, and the turning round joint is turned round in the threaded connection of sleeve lower extreme, and the sliding sleeve is fixed in the sleeve, and the screw lower part is outer hexagonal, and the sliding sleeve is interior hexagonal, and both clearance fit can realize freely sliding. The anti-torque motor output shaft 5 is fixedly connected with the upper part of the screw rod, the lower part of the screw nut is connected with a sliding cone through a pin shaft 10, the upper part of the sliding cone is a cylinder, the lower part of the sliding cone is a cone, and the sliding cone is driven by the screw rod mechanism to move up and down. The anti-twist joint is uniformly distributed with 2-4 anti-twist contact mounting holes along the radial direction, each anti-twist contact is respectively positioned in the anti-twist contact mounting hole, and a spring 13 is arranged between the anti-twist contact and the anti-twist contact mounting hole. The anti-twist contact is of a two-section combined structure, and a buffer cushion 15 is arranged between the two sections. The slippage cone contacts and presses the anti-torsion contact in the downward movement process, the anti-torsion contact contacts and presses the inner wall of the rope coring drill rod 2, anti-torsion is achieved, and the mud scraper does not rotate along with the operation of the scraper in the anti-torsion process. The cutting assembly comprises a cutting motor cover 16, a cutting motor 17, a cutting motor output shaft 18, a cutter holder 19, a cutter holder 20 and a scraper 21, wherein the cutting motor cover 16 is fixedly connected with the cutting motor, the upper part of the cutting motor cover is in threaded connection with the lower part of the anti-torsion connector, and the lower part of the cutting motor cover is in threaded connection with the cutter holder. The upper part of the knife rest penetrates through the knife rest, the upper part of the knife rest is fixedly connected with an output shaft of a cutting motor, and the lower part of the knife rest is hinged with a scraper. The number of the scrapers is 2-4, the outer side edge of each scraper is provided with a tooth-shaped edge, and the back of the inner side of each scraper is provided with a magnet 22. A waterproof sealing ring is arranged between the knife rest and the knife holder. The cutting motor rotates, the scraper operates under the action of centrifugal force, the cutting motor stops rotating, and the scraper is closed under the action of attraction of the magnet. Fig. 2 shows the scraper in an operating position with the scraper extended, and fig. 4 shows the scraper in an inoperative position with the scraper retracted.
The working process of the invention is explained in detail below with reference to the accompanying drawings. In the process of wire line coring drilling, if the inner wall of a wire line coring drill rod is subjected to mud skin formation to cause the throwing of a fisher to meet the blockage or the inner pipe assembly is lifted and blocked, the borehole diameter probe and the mud scraper are put into a well through an armored cable, as shown in figure 1. During the lowering process of the borehole diameter exploring tube, the inner diameter of a drill rod is continuously measured, the mud scraper is in a non-working state, as shown in fig. 4, the anti-torsion assembly is in a convergence state, the screw nut and the sliding cone are in the top position, the anti-torsion contact is converged in the anti-torsion joint and is not in contact with the drill rod, and the scraper is in a retraction state under the action of the magnetic attraction force. According to the law and experience of the inner wall of the drill rod forming mud skin, the lowering depth of the instrument in the well is generally not more than 80 meters, and the instrument starts to be lifted after the well diameter probe is lowered to the set depth and the inner wall of the drill rod continuously has no mud skin. When being close to the mud skin section in the promotion process, the winch switches into the low-speed promotion, at first the motor reversal is turned round in reverse, drive the awl rebound that slides through screw mechanism, the awl that slides is moving the in-process down and promote the anti-contact of turning round, anti-contact extrusion spring opens to the outside, when the screw moves down to the bottom when spacing, the anti-contact of turning round closely touches the inner wall of pressing the rope core drill rod, the winch lifting force rises until the highest value gradually, it is in the state of opening to show the anti-assembly of turning round, can provide anti-torque force, close the anti-motor of turning round. Then, a cutting motor is started, a scraper overcomes the attraction of a magnet to open under the action of centrifugal force, the serrated cutting edge is contacted with the inner wall of the rope coring drill rod, and continuous rotary cutting is performed, so that the purpose of cleaning mud skin is achieved, and the purpose is shown in figure 2. After the cleaning of the mud skin on the inner wall of the drill rod is finished, firstly, the cutting motor is closed, and the scraper is in a convergence state under the action of self weight and suction force; then the anti-torque motor is started to rotate positively, the sliding cone is driven to move upwards through the screw mechanism until the top is limited, the anti-torque contact is separated from the inner wall of the rope coring drill rod in the upward moving process of the sliding cone, the lifting force of the winch is gradually reduced to a normal value, when the screw nut moves upwards to the top limit, the anti-torque contact is completely converged in the anti-torque joint, the mud scraper returns to a non-working state, and the mud skin cleaning operation is completed.
Claims (5)
1. The utility model provides a drilling rod inner wall mud skin cleaning device is cored to rope which characterized in that: the drilling and coring device comprises a borehole diameter probe (27) and a mud scraper (28) which are connected up and down, wherein the borehole diameter probe and the mud scraper are positioned in a rope coring drill rod (2), the mud scraper consists of an anti-torsion assembly and a cutting assembly which are arranged up and down and connected with each other, the anti-torsion assembly comprises an anti-torsion motor (4), a screw rod mechanism, a sliding cone (11) and an anti-torsion contact (14), an output shaft (5) of the anti-torsion motor drives a screw rod (6) of the screw rod mechanism to rotate, the screw rod drives a screw nut (8) and the screw nut drives the sliding cone to move up and down, the anti-torsion contact (14) is contacted and pressed in the downward moving process of the sliding cone, and the anti-torsion contact is contacted and pressed on the inner wall of the rope coring drill rod (2); the cutting assembly comprises a cutting motor (17), a cutting motor output shaft (18), a tool rest (20) and a scraper (21), the cutting motor is connected with the tool rest through the cutting motor output shaft, the scraper is installed on the tool rest, the cutting motor rotating scraper is opened to work, and the cutting motor stopping scraper is closed.
2. The wireline coring drill rod inner wall mud skin cleaning device of claim 1, wherein: the anti-torsion assembly is also provided with an anti-torsion motor cover (3), a sleeve (7), a sliding sleeve (9) and an anti-torsion joint (12), the upper end of the sleeve is in threaded connection with the anti-torsion motor cover, the lower end of the sleeve is in threaded connection with the anti-torsion joint, the sliding sleeve is fixed in the sleeve, a screw is in sliding fit with the sliding sleeve, and the lower end of the screw is fixedly connected with a sliding cone; the anti-twist joint is uniformly distributed with anti-twist contact mounting holes along the radial direction, the anti-twist contact is positioned in the anti-twist contact mounting holes, and a spring (13) is arranged between the anti-twist contact and the anti-twist contact mounting holes.
3. The wireline coring drill rod inner wall mud skin cleaning device of claim 2, wherein: the cutting assembly is also provided with a cutting motor cover (16) and a cutter holder (19), the upper end of the cutting motor cover is in threaded connection with the anti-torsion connector, the lower end of the cutting motor cover is in threaded connection with the cutter holder, and the cutter holder penetrates through the cutter holder; the scraper is provided with 2-4 scrapers, the upper end of each scraper is hinged with a cutter frame, the outer side edge part of each scraper is provided with a tooth-shaped edge, and the back part of the inner side of each scraper is provided with a magnet (22).
4. The wireline coring drill rod inner wall mud skin cleaning device of claim 3, wherein: the borehole diameter probe and the mud scraper are connected through a reducer union (1), an armored cable (26) is arranged on the upper portion of the borehole diameter probe, and the armored cable is connected with a winch (24) through a pulley (25).
5. The wireline coring drill rod inner wall mud skin cleaning device of claim 4, wherein: the anti-torsion contact is of a two-section combined structure, a cushion pad (15) is arranged between the two sections, the two ends of the anti-torsion contact are spherical, and 2-4 anti-torsion contacts are arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710406438.3A CN107237612B (en) | 2017-06-02 | 2017-06-02 | Cleaning device for inner wall mud skin of rope coring drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710406438.3A CN107237612B (en) | 2017-06-02 | 2017-06-02 | Cleaning device for inner wall mud skin of rope coring drill rod |
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| Publication Number | Publication Date |
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| CN107237612A CN107237612A (en) | 2017-10-10 |
| CN107237612B true CN107237612B (en) | 2023-04-11 |
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| CN201710406438.3A Active CN107237612B (en) | 2017-06-02 | 2017-06-02 | Cleaning device for inner wall mud skin of rope coring drill rod |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108581069B (en) * | 2018-06-29 | 2023-01-03 | 中国地质大学（武汉） | Processing equipment and process for removing decarburized layer and cracks on inner wall of drill rod |
| CN110735616B (en) * | 2019-09-27 | 2021-09-24 | 李东胜 | Oil recovery well oil scraping device and using method thereof |
| US11732539B2 (en) | 2021-10-22 | 2023-08-22 | Baker Hughes Oilfield Operations Llc | Electrically activated whipstock interface system |
| US11725482B2 (en) * | 2021-10-22 | 2023-08-15 | Baker Hughes Oilfield Operations Llc | Electrically actuated tubular cleaning system |
| US11753892B2 (en) | 2021-10-22 | 2023-09-12 | Baker Hughes Oilfield Operations Llc | Electrically activated downhole anchor system |
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| CN107237612A (en) | 2017-10-10 |
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