CN113530450A - Combined pre-reaming construction method suitable for stratum with rock hardness of less than or equal to 30Mpa - Google Patents
Combined pre-reaming construction method suitable for stratum with rock hardness of less than or equal to 30Mpa Download PDFInfo
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- CN113530450A CN113530450A CN202110753836.9A CN202110753836A CN113530450A CN 113530450 A CN113530450 A CN 113530450A CN 202110753836 A CN202110753836 A CN 202110753836A CN 113530450 A CN113530450 A CN 113530450A
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- reaming
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- 238000010276 construction Methods 0.000 title claims abstract description 39
- 239000011435 rock Substances 0.000 title claims abstract description 15
- 238000005553 drilling Methods 0.000 claims abstract description 84
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 15
- 238000005406 washing Methods 0.000 claims abstract description 9
- 239000002002 slurry Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 7
- 238000004873 anchoring Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 2
- 239000000440 bentonite Substances 0.000 claims description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 239000004576 sand Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 244000208734 Pisonia aculeata Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- 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
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
Abstract
The invention belongs to the technical field of combined pre-reaming construction, and particularly relates to a combined pre-reaming construction method suitable for a stratum with rock hardness of less than or equal to 30Mpa, which comprises the following steps: s1: positioning a drilling machine; s2: drilling a guide hole; s3: combining and pre-reaming; s4: washing the hole; s5: the main pipe is pulled back. Compared with the conventional step-by-step pre-reaming construction method, the method has great popularity in the aspect of actual operation, and the purpose of high-speed pre-reaming is realized; the effect is better, and the cutting capacity is 9 times of the stepped pre-reaming cutting capacity; the number of times of manually applying the B-type tong for fastening is saved, the time is saved, and the potential safety hazard in the operation process of personnel is reduced; has use value and popularization value.
Description
Technical Field
The invention belongs to the technical field of combined pre-reaming construction, and particularly relates to a combined pre-reaming construction method suitable for a stratum with rock hardness of less than or equal to 30 Mpa.
Background
Horizontal Directional Drilling (Horizontal Directional Drilling) is a construction process that uses a Drilling apparatus installed on the surface to drill into the ground at a small penetration angle with respect to the ground to form a pilot hole, and then pre-reams the pilot hole to the size of a desired pull-back pipeline and lays a pipeline (line).
Along with the gradual increase of the back-dragging tonnage of the horizontal directional drilling machine, the back-dragging capacity of the back-dragging pipeline is gradually enhanced, the back-dragging pipeline diameter is DN110 to DN1200, and the back-dragging pipeline length is 300m to 2050 m. However, in the past decade, the gradual hole expanding process in the construction process of the horizontal directional drilling pipeline is rarely changed. The traditional step-by-step reaming process is weak in stratum cutting capability, the number of times of manually applying B-type large clamp fastening is large, and the required time is longer. The combined pre-reaming is carried out under the large background, but the existing combined pre-reaming construction technology is not mature, and particularly, a combined pre-reaming construction method for a stratum with the rock hardness of less than or equal to 30MPa is lacked under specific construction conditions.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the combined pre-reaming construction method suitable for the stratum with the rock hardness of less than or equal to 30Mpa, which saves the times of manually applying the B-type large clamp for fastening, saves the time and reduces the potential safety hazard in the operation process of personnel compared with the step-by-step pre-reaming.
The purpose of the invention can be realized by the following technical scheme: a combined pre-reaming construction method suitable for a stratum with rock hardness less than or equal to 30Mpa comprises the following steps,
s1: positioning a drilling machine;
1.1 determining the anchoring force of the ground anchor according to the actual condition of a construction stratum so as to meet the requirements of design and construction specifications;
1.2 determining the axis passed by the drilling machine according to the coordinates of the soil-entering point and the soil-exiting point in the design drawing;
s2: drilling a guide hole;
2.1 determining a guide hole drilling curve according to the maximum curvature radius of the back dragging pipe diameter and drawing description requirements, and determining the number of the drill rods, the maximum break angle of each drill rod and the maximum accumulated break angle of 4 continuous drill rods;
2.2, drilling a pilot hole, monitoring the slurry performance in real time in the process to ensure that the design and specification requirements are met, and simultaneously controlling a thrust force value and a torsion force value to strictly forbid strong torsion and strong pushing;
s3: combining and pre-reaming;
3.1, installing a combined pre-reaming drilling tool, adjusting the angle of the combined pre-reaming drilling tool to be consistent with the unearthing angle of the drill rod, and matching the rotation and the pulling force of the end of the drill to realize the smooth entering of the combined pre-reaming drilling tool into the hole;
3.2 providing power to the combined pre-reaming drilling tool through a power head of the drilling machine to cut the stratum, and simultaneously utilizing a mud circulating system to flow the cutting substances in the hole out of the hole;
3.3 repeating said 3.1, 3.2 to obtain the desired pore size;
s4: washing the hole;
4.1 checking the quality of the combined pre-reaming drilling tool;
4.2 in the hole washing process, the performance of the slurry material is improved and the change of drilling parameters is concerned at any time;
s5: the main pipe is pulled back.
Further, the axis traversed by the drilling rig in S1 is collinear with or parallel to the pipeline traversing axis.
Further, the properties of the slurry material include slurry viscosity, slurry displacement, and pumping pressure.
Furthermore, the slurry material is environment-friendly bentonite.
Further, in the process of S3, the torque parameter value and the push-pull force parameter value are required to control the pulling force walking speed and the reamer rotation speed.
Furthermore, the combined pre-reaming drilling tool comprises a first-stage combined pre-reaming drilling tool, wherein the first-stage combined pre-reaming drilling tool comprises a drilling machine power head, a drill rod, a DN400 reamer, a DN500 reamer, a DN600 reamer and a drill rod which are detachably connected in sequence.
Further, the drill power head, the drill rod, the DN400 reamer, the DN500 reamer, the DN600 reamer and the drill rod are in threaded connection.
Further, the mud circulating system comprises an on-site mud laboratory, the on-site mud laboratory is connected with a mud tank combined system and a sand removing device, a mud removing device is connected between the mud tank combined system and the sand removing device, the mud tank combined system is connected with a mud pump combined system, the mud pump combined system is connected with a drilling machine mud system, the drilling machine mud system is connected with a combined pre-reaming drilling tool, the combined pre-reaming drilling tool is connected with a mud pit, and the mud pit is connected with the sand removing device.
The invention has the beneficial effects that:
1. in the aspect of actual construction technology: compared with the conventional step-by-step pre-reaming construction method, the combined pre-reaming construction method has great popularity in the aspect of actual operation and achieves the aim of high-speed pre-reaming.
2. In the aspect of actual construction effect: the combined pre-reaming effect is better than the conventional step-by-step pre-reaming effect. The combined pre-reaming cutting capacity is 9 times of the stepped pre-reaming cutting capacity in the aspect of cutting stratum.
3. The combined pre-reaming ratio step-by-step pre-reaming saves the times of manually applying the B-type large clamp for fastening, saves time and reduces potential safety hazards in the operation process of personnel.
4. Compared with the step-by-step pre-reaming, the combined pre-reaming has the advantages of short construction period, good hole forming, low cost, safety, use value and popularization value.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic flow diagram of the mud circulation system of the present invention;
FIG. 3 is a schematic representation of the working principle of the present invention for cutting a subterranean formation.
Detailed Description
The invention is further explained with reference to the accompanying drawings, as shown in fig. 1 to fig. 3 in the drawings of the specification, the oriented drilling engineering of the cochleate river in 2-segment line engineering of the Yuexi natural gas main pipe network named Yangjiang trunk project is taken as an example: comprises the following steps of (a) carrying out,
s1: positioning a drilling machine;
1.1 according to the actual condition of a construction stratum, calculating the back dragging force to be 1600KN, considering the safety factor of 2-3 times, and the anchoring force of the ground anchor is equal to or more than 3200 KN.
1.2 determining the axis which the drilling machine passes through according to the coordinates of the soil-entering point and the soil-exiting point in the design drawing, wherein the axis which the drilling machine passes through is on the same straight line with the pipeline-passing axis or is parallel to the pipeline-passing axis.
S2: drilling a guide hole;
2.1 determining that a drilling curve of the guide hole meets the design and specification requirements, determining that the maximum break angle of each drill rod is 0.8 degrees, and the maximum accumulated break angle of four drill rods is 2.2 degrees;
2.2 pilot hole is crept into, and the in-process real time monitoring mud performance is in order to ensure to satisfy design and standard requirement, includes: the viscosity of the slurry is controlled to be 45-55S according to the requirement of the stratum; controlling the discharge capacity of the slurry to be 500-600L/min; the pump pressure is controlled to be less than or equal to 5 Mpa. In the drilling process of the pilot hole, the thrust and the torsion are controlled within a middle-low range, and the torque value is as follows: the high-grade rotating speed is applied, and the instrument panel displays that the MPA is less than or equal to 10; and (3) tensile force value: and applying a fast-gear rotating speed, displaying on an instrument panel to be less than or equal to 5MPA, and strictly forbidding strong torque and strong pushing.
S3: combining and pre-reaming;
3.1 after the construction of the guide hole is finished, a drill bit screw drilling tool (a mud motor) is dismounted, then a combined pre-reaming drilling tool is installed, and the installation angle needs to be paid attention to in the installation process so as to ensure that the screw thread of the reaming drilling tool is not damaged. The combined pre-reaming drilling tool comprises a first-stage combined pre-reaming drilling tool, and the first-stage combined pre-reaming drilling tool comprises a drilling machine power head, a drill rod, a DN400 reamer, a DN500 reamer, a DN600 reamer and the drill rod which are detachably connected in sequence. For example, the drill power head, the drill rod, the DN400 reamer, the DN500 reamer, the DN600 reamer and the drill rod are connected through threads. Due to the action of gravity, the combined pre-reaming drilling tool can press the whole drill rod downwards, so that a hoisting machine is applied to adjust the angle of the combined pre-reaming drilling tool to be consistent with the soil emergence angle of the drill rod, the angle is controlled to be 4-8 degrees, preferably 6 degrees, and then the combined pre-reaming drilling tool is smoothly drilled by matching with the rotation and the pulling force of the end of the drill rod.
And 3.2, providing power to the primary combined pre-reaming drilling tool through the power head of the drilling machine to cut the stratum (the principle is shown in the figure 3), and simultaneously utilizing a mud circulation system to flow the cutting substances in the hole out of the hole. In the reaming process of the primary combined pre-reaming drilling tool, the viscosity of slurry is controlled to be 50-65S; controlling the discharge capacity of the slurry to be 2000-2500L/min; the pump pressure is controlled to be less than or equal to 5 Mpa.
The mud circulating system comprises a field mud laboratory, the field mud laboratory is connected with a mud tank combined system and a desanding device, the desilting device is connected between the mud tank combined system and the desanding device, the mud tank combined system is connected with a mud pump combined system, the mud pump combined system is connected with a drilling machine mud system, the drilling machine mud system is connected with a combined pre-reaming drilling tool, the combined pre-reaming drilling tool is connected with a mud pool, and the mud pool is connected with the desanding device. The mud property is comprehensively measured and monitored in real time in an on-site mud laboratory, the data is transmitted to a mud tank combined system in the on-site mud laboratory, the mud tank combined system is used for allocating the mud property according to the data, the mud is pressurized through a mud pump combined system after being allocated, the pressurized mud flows into a mud system of a drilling machine, the mud is injected into a drill rod, the drill rod is connected with a primary combined pre-reaming drilling tool, the mud is injected into a hole, the mud flows in the hole, the mud enters a mud tank through a hole annulus for mud sedimentation, and the sedimentated mud is removed from particles and mud by a mud remover after passing through a sand remover. And the field slurry laboratory simultaneously monitors the slurry performance in the sand removing device and slurry tank combined system.
3.3, repeating the steps 3.1 and 3.2, replacing the first-stage combined type pre-reaming drilling tool with a second-stage combined type pre-reaming drilling tool, replacing the second-stage combined type pre-reaming drilling tool with a third-stage combined type pre-reaming drilling tool, and repeating the step 3.2 circularly to obtain the required aperture.
S4: washing the hole;
4.1, checking the quality of the combined pre-reaming drilling tool;
4.2 in the hole washing process of the combined pre-reaming drilling tool, the performance of a mud material is to be improved: the viscosity of the slurry is controlled to be 60-70S according to the hole washing requirement; controlling the discharge capacity of the slurry to be 2200-2600L/min; the pump pressure is controlled to be less than or equal to 5 Mpa. The change of drilling parameters is also paid attention to at any moment in the hole washing process: the torque value is high-grade rotating speed, and the instrument panel displays that the MPA is less than or equal to 10; and (3) tensile force value: and the rotating speed of a fast gear is applied, and the display of an instrument panel is less than or equal to 5 MPA.
S5: the main pipe is pulled back.
By using the method, the back-dragging work of directionally drilling the DN800 pipeline in the cochlic river is successfully completed, the line length is 538m, the crossing length is 460m, the construction period is successfully shortened by 24 days, and the cost is saved by 35 ten thousand.
Compared with the conventional step-by-step pre-reaming construction method, the method has great popularity in the aspect of actual operation, and the purpose of high-speed pre-reaming is realized; in the aspect of actual construction effect, the pre-reaming effect is good, and the cutting capacity is 9 times of the stepped pre-reaming cutting capacity; the number of times of manually applying the B-type tong for fastening is saved in the construction process, the time is saved, and the potential safety hazard in the operation process of personnel is reduced. In conclusion, the construction method has the advantages of short construction period, good hole forming, low cost, safety, use value and popularization value.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (8)
1. A combined pre-reaming construction method suitable for a stratum with rock hardness less than or equal to 30Mpa is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
s1: positioning a drilling machine;
1.1 determining the anchoring force of the ground anchor according to the actual condition of a construction stratum so as to meet the requirements of design and construction specifications;
1.2 determining the axis passed by the drilling machine according to the coordinates of the soil-entering point and the soil-exiting point in the design drawing;
s2: drilling a guide hole;
2.1 determining a guide hole drilling curve according to the maximum curvature radius of the back dragging pipe diameter and drawing description requirements, and determining the number of the drill rods, the maximum break angle of each drill rod and the maximum accumulated break angle of 4 continuous drill rods;
2.2, drilling a pilot hole, monitoring the slurry performance in real time in the process to ensure that the design and specification requirements are met, and simultaneously controlling a thrust force value and a torsion force value to strictly forbid strong torsion and strong pushing;
s3: combining and pre-reaming;
3.1, installing a combined pre-reaming drilling tool, adjusting the angle of the combined pre-reaming drilling tool to be consistent with the unearthing angle of the drill rod, and matching the rotation and the pulling force of the end of the drill to realize the smooth entering of the combined pre-reaming drilling tool into the hole;
3.2 providing power to the combined pre-reaming drilling tool through a power head of the drilling machine to cut the stratum, and simultaneously utilizing a mud circulating system to flow the cutting substances in the hole out of the hole;
3.3 repeating said 3.1, 3.2 to obtain the desired pore size;
s4: washing the hole;
4.1 checking the quality of the combined pre-reaming drilling tool;
4.2 in the hole washing process, the performance of the slurry material is improved and the change of drilling parameters is concerned at any time;
s5: the main pipe is pulled back.
2. The combined pre-reaming construction method suitable for the stratum with rock hardness less than or equal to 30Mpa as claimed in claim 1, characterized in that: the axis crossed by the drilling machine in the S1 is in the same line with or parallel to the pipeline crossing axis.
3. The combined pre-reaming construction method suitable for the stratum with rock hardness less than or equal to 30Mpa as claimed in claim 1, characterized in that: the properties of the mud material include mud viscosity, mud displacement, and pump pressure.
4. The combined pre-reaming construction method suitable for the stratum with rock hardness less than or equal to 30MPa according to claim 3, characterized in that: the slurry material is environment-friendly bentonite.
5. The combined pre-reaming construction method suitable for the stratum with rock hardness less than or equal to 30Mpa as claimed in claim 1, characterized in that: in the process of S3, the torque parameter value and the push-pull force parameter value are taken into consideration to control the pulling force walking speed and the reamer rotation speed.
6. The combined pre-reaming construction method suitable for the stratum with rock hardness less than or equal to 30Mpa as claimed in claim 1, characterized in that: the combined pre-reaming drilling tool comprises a one-level pre-reaming combined drilling tool, wherein the one-level pre-reaming combined drilling tool comprises a drilling machine power head, a drill rod, a DN400 reamer, a DN500 reamer, a DN600 reamer and a drill rod which are detachably connected in sequence.
7. The combined pre-reaming construction method suitable for the stratum with rock hardness less than or equal to 30MPa according to claim 6, characterized in that: the drilling machine power head, the drill rod, the DN400 reamer, the DN500 reamer, the DN600 reamer and the drill rod are in threaded connection.
8. The combined pre-reaming construction method suitable for the stratum with rock hardness less than or equal to 30Mpa as claimed in claim 1, characterized in that: the mud circulating system comprises an on-site mud laboratory, the on-site mud laboratory is connected with a mud tank combination system and a desanding device, the mud removing device is connected between the mud tank combination system and the desanding device, the mud tank combination system is connected with a mud pump combination system, the mud pump combination system is connected with a drilling machine mud system, the drilling machine mud system is connected with a combined pre-reaming drilling tool, the combined pre-reaming drilling tool is connected with a mud pit, and the mud pit is connected with the desanding device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110753836.9A CN113530450A (en) | 2021-07-03 | 2021-07-03 | Combined pre-reaming construction method suitable for stratum with rock hardness of less than or equal to 30Mpa |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110753836.9A CN113530450A (en) | 2021-07-03 | 2021-07-03 | Combined pre-reaming construction method suitable for stratum with rock hardness of less than or equal to 30Mpa |
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| CN203188914U (en) * | 2013-04-12 | 2013-09-11 | 谢龙水 | Hard rock diamond step-by-step chambering combined drill |
| CN104763343A (en) * | 2015-03-05 | 2015-07-08 | 成都理工大学 | Embedded bionic nozzle type multi-stage hole expanding drilling tool and hole expanding method thereof |
| CN205532291U (en) * | 2016-03-29 | 2016-08-31 | 辽河石油勘探局 | Reamer |
| CN109989710A (en) * | 2017-12-30 | 2019-07-09 | 中国人民解放军63653部队 | High-precision heavy-caliber horizontal resistance force method |
| CN110145230A (en) * | 2019-04-23 | 2019-08-20 | 上海勃利燃气设备有限公司 | A kind of horizontal directional drilling trombone slide method |
| CN111287653A (en) * | 2020-01-15 | 2020-06-16 | 安徽建筑大学 | Large-caliber forward reaming construction method for horizontal directional drilling of hard rock |
-
2021
- 2021-07-03 CN CN202110753836.9A patent/CN113530450A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003314192A (en) * | 2002-04-25 | 2003-11-06 | Kajima Corp | Pipe member embedding method |
| CN202788617U (en) * | 2012-07-26 | 2013-03-13 | 中国石油天然气集团公司 | Horizontally oriented reaming device |
| CN203188914U (en) * | 2013-04-12 | 2013-09-11 | 谢龙水 | Hard rock diamond step-by-step chambering combined drill |
| CN104763343A (en) * | 2015-03-05 | 2015-07-08 | 成都理工大学 | Embedded bionic nozzle type multi-stage hole expanding drilling tool and hole expanding method thereof |
| CN205532291U (en) * | 2016-03-29 | 2016-08-31 | 辽河石油勘探局 | Reamer |
| CN109989710A (en) * | 2017-12-30 | 2019-07-09 | 中国人民解放军63653部队 | High-precision heavy-caliber horizontal resistance force method |
| CN110145230A (en) * | 2019-04-23 | 2019-08-20 | 上海勃利燃气设备有限公司 | A kind of horizontal directional drilling trombone slide method |
| CN111287653A (en) * | 2020-01-15 | 2020-06-16 | 安徽建筑大学 | Large-caliber forward reaming construction method for horizontal directional drilling of hard rock |
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