CN110566124A - Drilling deviation correction comprehensive technical method - Google Patents
Drilling deviation correction comprehensive technical method Download PDFInfo
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- CN110566124A CN110566124A CN201910916291.1A CN201910916291A CN110566124A CN 110566124 A CN110566124 A CN 110566124A CN 201910916291 A CN201910916291 A CN 201910916291A CN 110566124 A CN110566124 A CN 110566124A
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- 238000005553 drilling Methods 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000012937 correction Methods 0.000 title claims abstract description 23
- 239000003973 paint Substances 0.000 claims abstract description 6
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 239000000523 sample Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 10
- 230000008092 positive effect Effects 0.000 abstract description 2
- 239000011435 rock Substances 0.000 description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 22
- 230000000694 effects Effects 0.000 description 12
- 229910052742 iron Inorganic materials 0.000 description 11
- 241000923606 Schistes Species 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 239000011044 quartzite Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 229910052612 amphibole Inorganic materials 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- VYAXJSIVAVEVHF-RYIFMDQWSA-N [(8r,9s,13s,14s,17s)-17-(cyclohexen-1-yloxy)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-3-yl] propanoate Chemical compound O([C@@H]1[C@@]2(C)CC[C@@H]3C4=CC=C(C=C4CC[C@H]3[C@@H]2CC1)OC(=O)CC)C1=CCCCC1 VYAXJSIVAVEVHF-RYIFMDQWSA-N 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000002601 radiography Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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- 239000012991 xanthate Substances 0.000 description 1
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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/10—Correction of deflected boreholes
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- General Life Sciences & Earth Sciences (AREA)
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- Earth Drilling (AREA)
Abstract
The invention discloses a drilling deviation correction comprehensive technical method which is characterized by comprising the following steps: step 1: drilling direction reservation; step 2: a lower deviation correcting wedge; and step 3: an LZ-73 type continuous whipstock is used for correcting the whipstock; and 4, step 4: after the position is accurately found through the ground instrument, marks are made on the drilling machine and the drill rod through red paint, then the drilling tool is placed down, the change of the ground instrument is observed, the step is repeated for many times, if the change of the ground instrument is not large, the orientation position can be determined, and if the change is large, the change of the bottom of the lower access hole is used as the standard to carry out correction. The invention relates to the field of borehole deviation correction, in particular to a comprehensive technical method for borehole deviation correction. Compared with the prior art, the invention has the advantages and positive effects that: the drilling deviation correction comprehensive technical method solves the problem of drilling deviation in the area, effectively utilizes the drilling, saves the cost for construction units, provides a new technical method for drilling construction in similar strong deviation stratum in future, and has good popularization and utilization values.
Description
Technical Field
The invention relates to the field of borehole deviation correction, in particular to a comprehensive technical method for borehole deviation correction.
background
The land structure of the Lanling iron mine area is located at the northwest edges of the North China land blocks, the Luxi swelling areas, the Luzhong swelling areas, the Zaozhuang broken Longdai areas and the Moshan protrusions, the exposed bedrock in the areas are distributed sporadically and mainly exposed out of the northwest part and the north part of the area, and the rest areas are covered by the fourth series of loose deposits. The fold structure and the fracture structure in the bedrock and the cover layer in the region are relatively developed, the region belongs to a region with a relatively complex geological structure, and the invaded rock in the region is relatively undeveloped.
The stratum in the Lanling iron mine area develops completely, and a new Taigu world, a new Yuangu world, an ancient world and a new birth world are all exposed. Wherein the Shancao valley group of Taishan mountain rock group in New Taigu kingdom is a main mineral-containing stratum in the region, and the lithology is mainly that the Heiyun metamorphic rock sandwiches magnet angle scintillation quartzite, magnet angle scintillation schist, Dolomite metamorphic rock and the like. The sheet theory trends to be nearly east and west, and is influenced by the fold structure, the rock strata have the north-south tendency, the inclination angle is steeper, and the part is upright. The original rock is built by using basic volcaniclastic sedimentary rock and terrestrial clastic sedimentary rock with ferrosilicon, and is a set of metamorphic crystalline basement rock system which is composed of long-angle amphibole, schist and metamorphic rock and has the thickness of 690-5281 m.
the Taishan mountain grass valley group black cloud metamorphic iron ore and the oblique long angle amphibole develop and deposit metamorphic iron ore, and large iron ore deposits such as xanthate iron ore and Lanling iron ore deposits are formed in partial sections.
The Lanling iron ore deposit is an extra-large iron ore deposit discovered by Shandong geological exploration institute of the general office of the centralized geological mine in recent years, and the amount of iron ore resources is totally ascertained to be 6.2 hundred million tons. The lithology of the ore stratum in the mining area is that the black cloud metamorphic rock sandwiches magnet angle scintillation quartzite, magnet angle scintillation schist, two cloud metamorphic rocks and the like, fresh rocks are hard and compact, have blocky structures, structural cracks do not develop, the engineering geology property is good, the saturated compressive strength of the rocks is 59.75-190 Mpa, the average compressive strength is 117.25Mpa, the shearing strength is 6.30-21.70 Mpa, and the rocks belong to hard rocks. The mineral layer is strip magnet quartzite, steel gray, a strip structure and a fine grain structure, has strong magnetism, and the rock mass is hard and complete, good in engineering geological performance, high in mechanical strength, undeveloped in a structural plane, partially broken, high in rock saturated compressive strength of 63.10-306.00 MPa, high in shear strength of 4.55-25.6 MPa and high in rock mechanical strength, and belongs to hard rock.
The landling iron ore body assigned surrounding rock is Mount Taishan rock crowd Shancao valley group black cloud granolites, magnet angle flash quartzites, magnet angle flash schists, two cloud granolites and the like, the rock is hard, a drilling machine deviates from a exploration line to different degrees in the drilling process, the vertex angle floats upwards or sags, the actual track of the drilled hole does not accord with the designed track of the drilled hole, the ore finding effect is not ideal, and the directional drilling cannot be realized in a strong deflecting stratum according to the existing national solid mineral mechanical rock core drilling deviation correcting and deflecting technology.
Disclosure of Invention
The invention aims to solve the technical problem of providing a drilling deviation correction comprehensive technical method, which solves the problem of deviation of the drilling in the area, effectively utilizes the drilling, saves the cost for construction units and provides a new technical method for drilling construction in similar strong deviation stratums in future.
The invention adopts the following technical scheme to realize the purpose of the invention:
A drilling deviation correction comprehensive technical method is characterized by comprising the following steps:
The method comprises the following steps: drilling direction reservation: stratum lithologic deviation is strong, a drill hole is drilled deeply, the drill hole can be distorted and inclined in different degrees in the drilling process, and a drilling direction reservation method is adopted according to the depth of an ore body layer, so that the drill hole is at a designed ore-finding position or near the ore-finding position;
Step two: lower deviation correcting wedge: sawing the sleeve according to the calculated inclination at the position of the drill rod corresponding to the inclination correcting depth, then overturning the sleeve by a certain angle, and re-installing the sleeve together to enable the drill rod to drill along the calculated inclination so as to achieve the final purpose of inclination correcting;
step three: continuous whipstock model LZ-73 for whipstock: erecting an LZ-73 type continuous whipstock on the ground, simulating the direction corresponding to a slide block bus of the LZ-73 type continuous whipstock when the lower part of the LZ-73 type continuous whipstock reaches the bottom of a hole, adjusting the included angle between a guide inclination line of a direction finder and a probe tube bus of the direction finder in the direction of the apex angle and the azimuth angle of a drilling tool according to the requirement of whipstock, screwing the screw thread of each stand when the hole is drilled downwards in a directional mode, not allowing a drilling tool to be twisted by strong force and driven under the condition that the rated drilling pressure is not increased, stopping when the hole is drilled downwards 0.3-0.6m away from the bottom of the hole, clamping the drilling tool at the hole opening by using a cushion fork, and preparing for directional operation;
Step four: after the position is accurately found through the ground instrument, marks are made on the drilling machine and the drill rod through red paint, then the drilling tool is placed down, the change of the ground instrument is observed, the step is repeated for many times, if the change of the ground instrument is not large, the orientation position can be determined, and if the change is large, the change of the bottom of the lower access hole is used as the standard to carry out correction.
As a further limitation to the technical solution, in the first step, the design orientation of the drilling hole is 120 °, in the first step, an orientation reservation method is adopted, and the actual drilling orientation is 178 ° to 190 °.
as a further limitation to the present technical solution, in the second step, the turning is performed by a certain angle of 180 °.
As a further limitation of the technical solution, the LZ-73 continuous whipstock in the third step is composed of a stator and a rotor, when the stator and the rotor are unlocked, the LZ-73 continuous whipstock is used to make a linear motion along the extension direction of the drill hole under the action of the bit pressure, on the other hand, the LZ-73 continuous whipstock generates a lateral displacement due to the bit pressure and abuts against the hole wall, and the reaction generated on the hole wall prompts the LZ-73 continuous whipstock to cut the opposite hole wall, thereby causing the hole to be deviated.
Compared with the prior art, the invention has the advantages and positive effects that: the method has the advantages that the strong deflecting characteristic formed in the stratum structure and the occurrence and the ore finding drilling construction difficulty are used in the domestic rare Lanling area, a good ore finding effect is achieved, and the construction process and the technical level of the method basically reach the limit in the ore area according to the drilling capability of the current solid ore exploration in China. The drilling deviation correction comprehensive technical method solves the problem of drilling deviation in the area, effectively utilizes the drilling, saves the cost for construction units, provides a new technical method for drilling construction in similar strong deviation stratum in future, and has good popularization and utilization values.
Drawings
Fig. 1 is a schematic diagram of the drilling azimuth reservation method of the present invention.
fig. 2 is a schematic view of the deflecting principle of the present invention.
FIG. 3 is a schematic view of the direction finder indicating field of the present invention.
FIG. 4 is a schematic view of the present invention for the installation of casing and drill pipe.
FIG. 5(a) is a schematic view showing the structure of an LZ-73 type continuous whipstock of the present invention, and FIG. 5(b) is a schematic view showing the state of the LZ-73 type continuous whipstock of the present invention.
In the figure: a2, a drilling bottom side, B2, a drilling right side, C2, a drilling top side, D2, a drilling left side, E2, a continuous whipstock wedge-shaped sliding block center bus, gamma, the rotation angle of the continuous whipstock wedge-shaped sliding block center bus relative to the drilling bottom side, A3, a zero boundary point from a positive region to a short zero region, B3, a zero boundary point from the short zero region to a negative region, C3, an installation position with the best radiography effect, S, the drilling bottom side, N, the drilling top side, W, the drilling left side, E3, the drilling right side, 1, a driving shaft, 2, a single action shell, 3, a working spring, 4, a stator shell, 5, a positioning sleeve, 6, a positioning joint, 7, a spline shaft, 8, a return spring, 9, a spline sleeve, 10, an upper wedge, 11, a driven shaft, 12, 13, a sliding block, 14, a lower half, 15, 16, a wedge roller.
Detailed Description
an embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.
As shown in fig. 1 to 5, a drilling hole deviation correction comprehensive technical method is characterized by comprising the following steps:
The method comprises the following steps: drilling direction reservation: stratum lithologic deviation is strong, a drill hole is drilled deeply, the drill hole can be distorted and inclined in different degrees in the drilling process, and a drilling direction reservation method is adopted according to the depth of an ore body layer, so that the drill hole is at a designed ore-finding position or near the ore-finding position;
step two: lower deviation correcting wedge: sawing the sleeve according to the calculated inclination at the position of the drill rod corresponding to the inclination correcting depth, then overturning the sleeve by a certain angle, and re-installing the sleeve together to enable the drill rod to drill along the calculated inclination so as to achieve the final purpose of inclination correcting;
Step three: continuous whipstock model LZ-73 for whipstock: erecting an LZ-73 type continuous whipstock on the ground, simulating the direction corresponding to a slide block bus of the LZ-73 type continuous whipstock when the lower part of the LZ-73 type continuous whipstock reaches the bottom of a hole, adjusting the included angle between a guide inclination line of a direction finder and a probe tube bus of the direction finder in the direction of the apex angle and the azimuth angle of a drilling tool according to the requirement of whipstock, screwing the screw thread of each stand when the hole is drilled downwards in a directional mode, not allowing a drilling tool to be twisted by strong force and driven under the condition that the rated drilling pressure is not increased, stopping when the hole is drilled downwards 0.3-0.6m away from the bottom of the hole, clamping the drilling tool at the hole opening by using a cushion fork, and preparing for directional operation; the LZ-73 continuous whipstock is a conventional product and is not described in detail.
step four: after the position is accurately found through the ground instrument, marks are made on the drilling machine and the drill rod through red paint, then the drilling tool is placed down, the change of the ground instrument is observed, the step is repeated for many times, if the change of the ground instrument is not large, the orientation position can be determined, and if the change is large, the change of the bottom of the lower access hole is used as the standard to carry out correction.
In the step one, the design orientation of the drilling hole is 120 degrees, in the step 1, an orientation reservation method is adopted, and the actual drilling orientation is 178-190 degrees.
And in the second step, the overturning is performed by a certain angle of 180 degrees.
The LZ-73 continuous whipstock in the third step consists of a stator and a rotor, when the stator and the rotor are unlocked, the LZ-73 continuous whipstock is used for making linear motion along the extension direction of a drill hole under the action of the bit pressure, on the other hand, the LZ-73 continuous whipstock generates transverse displacement due to the action of the bit pressure and is abutted against the hole wall, and the reaction generated by the hole wall prompts the LZ-73 continuous whipstock to cut the opposite hole wall, thereby causing the hole to be skewed.
the main technical parameters of the LZ-73 type continuous whipstock are that the applicable aperture is 75-88 mm; the maximum radial extension of the slide block is 25 mm; allowing the borehole to exceed the diameter by 15 mm; the deflecting strength is 0.3-0.8 DEG/m; drilling procedures; the bit pressure is 25-28 kN; the rotating speed is 100-200 r/min; the drilling fluid amount is 50-70L/min; the outer diameter of the drilling tool is 73 mm; the service life is more than 80 h.
the following examples illustrate details:
Step 1: drilling direction reservation: because the stratum lithologic deviation of the local area is strong, the drill hole is drilled deeply, the drill hole can be distorted and inclined in different degrees in the drilling process, in order to achieve the purpose that the drill hole can penetrate through the designed ore body layer position in the drilling process, through statistics, research and experiments, the method of drilling direction reservation is adopted in the ore area according to the depth of the ore body layer position, so that the drill hole sees the ore at the designed ore position or the position near the ore position, and the best ore finding effect is achieved. As shown in figure 1, on the exploration lines of the mining area 60 and 68, the design positions of the drill holes ZK60-1 and ZK68-2 are 210 degrees, the actual drilling positions are 186 degrees and 180 degrees respectively according to the deviation trajectory of the drill holes summarized by the comprehensive research, and the position reservation method is adopted, so that the drill holes see the mine at the designed mine-seeing positions.
Step 2: lower deviation correcting wedge: according to the characteristic of stratum deflection in the area, in the drilling construction process of the mining area, a deflection correction solution is provided, namely at the depth needing deflection correction, corresponding to the position of a drill rod at the deflection correction depth, a sleeve is sawn according to the calculated inclination, then the sleeve is turned over for 180 degrees and is installed again, and the drill rod is made to drill along the calculated inclination, so that the final purpose of deflection correction is achieved;
and step 3: continuous whipstock model LZ-73 for whipstock:
When the whipstock is in a free state, as shown in fig. 5a, the sliding block is in a recovery state, and the stator and the rotor do not generate relative displacement because the positioning sleeve and the positioning key are locked with each other. This provides the necessary conditions for the accuracy of the whipstock orientation at the bottom of the hole.
when pressure is applied to the whipstock, the positioning key is disengaged, the stator and the rotor are unlocked, the rotor restores to rotate, the stator does not rotate, and the drill bit only makes linear motion along the extension direction of the drill hole by utilizing the pulley on the sliding block under the action of the drill pressure. On the other hand, the sliding block of the stator part generates transverse displacement under the action of the bit pressure and abuts against the hole wall, and the reaction generated by the hole wall prompts the drill bit to cut the opposite hole wall, so that the hole is inclined.
The LZ-73 continuous whipstock has different orientations at the bottom of the hole, and different rectification and whiplash effects, and the basic principle and skewness result are shown in fig. 2:
Assuming that the deflecting strength of the LZ series connection whipstock is i and the unit is degree/m;
The deflecting effect on the vertex angle is β i, β i is i | cos γ |;
The deflecting effect on the azimuth angle is α i, α i ═ i | sin γ |.
Observing along the drilling and depth-increasing direction, the deflecting effect of the continuous deflecting device is as follows:
E2 is arranged at the point A2, the vertex angle is increased, and when the E2 is arranged at the point C2, the vertex angle is reduced; the azimuth angle is decreased when the device is installed at the point B2, and the azimuth angle is increased when the device is installed at the point D2. The device is arranged between A2 and B2, the vertex angle is increased, and the azimuth angle is reduced; the device is arranged between B2 and C2, the vertex angle is reduced, and the azimuth angle is reduced; the device is arranged between C2 and D2, the vertex angle is reduced, and the azimuth angle is increased; the device is arranged between D2 and A2, the vertex angle is increased, and the azimuth angle is increased.
As shown in fig. 1, the problem with ZK61-1 hole is that the top angle is sagging and the azimuth angle is large, which requires the continuous whipstock to be installed with the whipstock centerline between the drilling counter and the right side counter, and there are 4 divisions for the number of orienters we use: long zero, short zero, positive, negative, as shown in fig. 3, the short zero is approximately in the range of about 15 °. If the effect of the kick-off is to be achieved, it is considered necessary to locate this area at the counter and the left side of the borehole. After a zero boundary point A from a positive number area to a short zero area and a zero boundary point B from the short zero area to a negative number area of the orientation instrument are determined by rotating the drill rod, the optimal deflecting position C is found through multiple verification. The purpose of this is to make the location no longer be the control of a single point, but find 2 points first and then find the 3 rd point of the most standing item accurately, get the effect that the orientation is more accurate in the hole, avoid great error to appear.
examination of LZ-73 type continuous whipstock before use:
(1) And (3) checking each component, particularly ensuring compact connection and flexible sliding of the deflecting component (an upper half wedge, a lower half wedge and a central sliding block).
(2) The idler wheel on the central sliding block is ensured to rotate flexibly, and a new wheel is used as far as possible, so that the deflecting is compared after the deflecting is finished, and the working condition of a deflecting component is judged. (if the slide block is opened, the roller only has rolling abrasion, the abrasion is light and is uniform, and if the slide block is not opened, the roller rotates along with the drill rod in a circumferential mode, the roller is abraded by half, and the outer side of the roller is abraded more seriously than the inner side of the roller).
(3) the connection of the positioning joint and the positioning sleeve with other parts is required to meet the requirements. Whether the sliding block works in the hole can be judged by comparing the appearance conditions of the connector and the positioning sleeve before and after use.
(4) And (4) painting red paint on a positioning pin in the positioning joint, and judging whether the positioning pin is put in the drilling tool in place or not under the positioning instrument.
lZ-3 type continuous whipstock ground positioning:
there are 2 cases of LZ-3 type continuous whipstock ground positioning:
(1) And calculating the installation angle beta of the whipstock facing to the bottom of the hole by calculation, and measuring the initial torsion angle phi of the directional joint bus and the slide block bus. And adjusting the included angle alpha between the guide shoe reticle of the orientation instrument and the probe tube of the orientation instrument according to the formula alpha-phi-beta.
(2) the LZ-73 continuous whipstock was erected at the surface to simulate the angle of the drill bit at the top and azimuth when lowered to the bottom of the hole. And then adjusting the corresponding direction of the continuous whipstock slider bus according to the whipstock requirement. And then adjusting the included angle between the guide shoe reticle of the direction finder and the generatrix of the probe tube of the direction finder in the direction.
And 4, step 4: after the position is accurately found through the ground instrument, marks are made on the drilling machine and the drill rod through red paint, then the drilling tool is placed down, the change of the ground instrument is observed, the step is repeated for many times, if the change of the ground instrument is not large, the orientation position can be determined, and if the change is large, the change of the bottom of the lower access hole is used as the standard to carry out correction.
after the orientation in the hole is finished, the drilling tool is placed at the bottom of the hole in a rod-reversing mode. And (5) opening a water pump, punching for 5-10min, and weighing. According to the weighing result, the pressure is appropriately increased or reduced, so that the bit pressure is within the determined range of the continuous whipstock. After pressure is applied to ensure the whipstock slide is opened, the clutch is slowly released allowing the drill to slowly rotate.
After the drilling is observed for several minutes without abnormal conditions, the handle is driven to the drilling position to perform deflecting drilling. The deflecting trend generated by deflection correction is ensured to exert an effect, so that the azimuth angle meets the requirement of geological ore finding.
The three methods are integrated together, and the strong deflecting characteristic formed by the stratum structure and the attitude and the ore searching and drilling construction difficulty thereof are used in the Lanling mine area which is rare in China, so that a better ore searching effect is obtained.
the above disclosure is only for the specific embodiment of the present invention, but the present invention is not limited thereto, and any variations that can be made by those skilled in the art should fall within the scope of the present invention.
Claims (4)
1. A drilling deviation correction comprehensive technical method is characterized by comprising the following steps:
the method comprises the following steps: drilling direction reservation: stratum lithologic deviation is strong, a drill hole is drilled deeply, the drill hole can be distorted and inclined in different degrees in the drilling process, and a drilling direction reservation method is adopted according to the depth of an ore body layer, so that the drill hole is at a designed ore-finding position or near the ore-finding position;
Step two: lower deviation correcting wedge: sawing the sleeve according to the calculated inclination at the position of the drill rod corresponding to the inclination correcting depth, then overturning the sleeve by a certain angle, and re-installing the sleeve together to enable the drill rod to drill along the calculated inclination so as to achieve the final purpose of inclination correcting;
Step three: continuous whipstock model LZ-73 for whipstock: erecting an LZ-73 type continuous whipstock on the ground, simulating the direction corresponding to a slide block bus of the LZ-73 type continuous whipstock when the lower part of the LZ-73 type continuous whipstock reaches the bottom of a hole, adjusting the included angle between a guide inclination line of a direction finder and a probe tube bus of the direction finder in the direction of the apex angle and the azimuth angle of a drilling tool according to the requirement of whipstock, screwing the screw thread of each stand when the hole is drilled downwards in a directional mode, not allowing a drilling tool to be twisted by strong force and driven under the condition that the rated drilling pressure is not increased, stopping when the hole is drilled downwards 0.3-0.6m away from the bottom of the hole, clamping the drilling tool at the hole opening by using a cushion fork, and preparing for directional operation;
Step four: after the position is accurately found through the ground instrument, marks are made on the drilling machine and the drill rod through red paint, then the drilling tool is placed down, the change of the ground instrument is observed, the step is repeated for many times, if the change of the ground instrument is not large, the orientation position can be determined, and if the change is large, the change of the bottom of the lower access hole is used as the standard to carry out correction.
2. The borehole deviation rectification comprehensive technical method according to claim 1, characterized in that: in the step one, the design orientation of the drilling hole is 120 degrees, in the step 1, an orientation reservation method is adopted, and the actual drilling orientation is 178-190 degrees.
3. The borehole deviation rectification comprehensive technical method according to claim 1, characterized in that: and in the second step, the overturning is performed by a certain angle of 180 degrees.
4. The borehole deviation rectification comprehensive technical method according to claim 1, characterized in that: the LZ-73 continuous whipstock in the third step consists of a stator and a rotor, when the stator and the rotor are unlocked, the LZ-73 continuous whipstock is used for making linear motion along the extension direction of a drill hole under the action of the bit pressure, on the other hand, the LZ-73 continuous whipstock generates transverse displacement due to the action of the bit pressure and is abutted against the hole wall, and the reaction generated by the hole wall prompts the LZ-73 continuous whipstock to cut the opposite hole wall, thereby causing the hole to be skewed.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10140958A (en) * | 1996-11-15 | 1998-05-26 | Taisei Corp | Drilling method and device correcting bent hole |
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