CN114109422A - Guide type push pipe installation construction method - Google Patents
Guide type push pipe installation construction method Download PDFInfo
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- CN114109422A CN114109422A CN202010868499.3A CN202010868499A CN114109422A CN 114109422 A CN114109422 A CN 114109422A CN 202010868499 A CN202010868499 A CN 202010868499A CN 114109422 A CN114109422 A CN 114109422A
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- 238000010276 construction Methods 0.000 title claims abstract description 65
- 238000009434 installation Methods 0.000 title claims abstract description 50
- 238000005553 drilling Methods 0.000 claims abstract description 98
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/1006—Making by using boring or cutting machines with rotary cutting tools
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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
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/1066—Making by using boring or cutting machines with fluid jets
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/1086—Drives or transmissions specially adapted therefor
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Abstract
The embodiment of the application discloses a guiding type push pipe installation construction method, and belongs to the technical field of pipeline trenchless construction. The method and the device can combine the horizontal directional drilling machine and the pipe pushing machine, replace a pipe pushing machine head in direct pipe laying construction by the conical reamer, and control the horizontal directional drilling machine to conduct guide hole construction according to a design curve. After the construction of the guide hole is completed, a subsequent reaming direction track is provided for the horizontal directional drilling machine. When the pipeline is laid, the pipe pushing machine provides the thrust of reaming bit pressure and pipeline installation, so that one-time reaming back dragging of the horizontal directional drill is realized, and the pipeline installation is completed. The installation method disclosed by the application is wide in geological range, and especially, the installation construction of the pipeline can be realized at the terminal of the weak cementation bottom layer which is difficult to construct by horizontal directional drilling.
Description
Technical Field
The embodiment of the application relates to the technical field of pipeline trenchless construction, in particular to a guiding type push pipe installation construction method.
Background
In the field of large-scale pipeline laying, the direct pipe laying construction technology is widely applied.
In one scenario of engineering application, the direct pipe-laying construction technique includes the following procedures. The tunnel excavation is carried out by the pipe pushing machine head, and the pipe pushing machine provides thrust through a pipeline connected with the pipe pushing machine head. The pipeline with larger diameter is difficult to form a hole at one time in the construction process. Therefore, direct pipe laying requires multiple changes of cutting bits and cleaning of the cuttings to eventually expand the diameter of the cavity to that required by the pipe.
In the application scenario, the time cost and the energy cost of trenchless pipeline laying are high, and the process is complex.
Disclosure of Invention
The embodiment of the application provides a guiding type push pipe installation construction method, and the problems that the time cost and the nuclear energy cost of trenchless pipeline laying are high and the process is complex can be solved. The technical scheme is as follows:
a guide type push pipe installation construction method is applied to a push pipe installation system, the push pipe installation system comprises a horizontal directional drilling machine (1), a directional drilling machine control room (2), a directional drilling machine power station (3), a mud subsystem (4), a drill rod (5), a guide reamer (6), a conical reamer (7), a transfer case (8), a drag reduction sleeve (9), a pipeline (10), a push pipe machine control room (11), a push pipe machine power station (12), a ground anchor (13) and a push pipe machine (14), and the method comprises the following steps:
controlling the horizontal directional drilling machine (1) to carry out guide hole construction according to a design curve;
-coupling the drill rod (5) and the pilot reamer (6) when the pilot hole is through;
coupling the pilot reamer (6) and the conical reamer (7);
coupling the conical reamer (7) and the transfer case (8);
the transfer case (8) is connected with the pipeline (10) through the drag reduction sleeve (9), and the drag reduction sleeve (9) is used for being sleeved on the periphery of the pipeline (10) and reducing friction resistance through mud;
passing the pipe (10) through the push (14) at the unearthed end;
controlling the pipe pusher (14) to apply a pushing force to the pipe (10);
controlling the horizontal directional drilling machine (1) to provide a cutting torque to the conical reamer (7) through the drill rod (5);
controlling the conical reamer (7) to rotationally cut material in the formation;
primary reaming is realized through the guide reamer (6) and the conical reamer (7) is guided to ream according to the track of the guide hole;
when the conical reamer (7) completes reaming on the track of the guide hole, the pipeline (10) is installed in a pipe-shaped space expanded by the conical reamer (7).
Optionally, the construction method further includes:
acquiring a unit stroke M of the horizontal directional drilling machine (1), wherein M is a positive number;
acquiring unit travel N of the pipe pushing machine (14), wherein N is a positive number;
according to the unit stroke M of the horizontal directional drilling machine (1) and the unit stroke N of the pipe pushing machine (14), the stroke of the horizontal directional drilling machine (1) is matched with the stroke of the pipe pushing machine (14).
Optionally, the matching of the stroke of the horizontal directional drilling machine (1) and the stroke of the pipe pushing machine (14) according to the unit stroke M of the horizontal directional drilling machine (1) and the unit stroke N of the pipe pushing machine (14) comprises:
acquiring a target time length T required by a unit stroke N of the pipe pusher (14);
adjusting the stroke of the horizontal directional drilling machine (1) in the target time length T to be N.
Optionally, the installing the pipe (10) in the pipe-shaped space expanded by the conical reamer (7) when the conical reamer (7) completes reaming on the track of the pilot hole comprises:
when the conical reamer (7) advances by a unit stroke N under the action of the pipe pushing machine (14), the horizontal directional drilling machine (1) stops applying back dragging force and cutting torque to the guide reamer (6) and the conical reamer (7);
controlling a pipe clamping device of the pipe pushing machine (14) to release the pipeline (10).
Optionally, the primary reaming by the pilot reamer (6) and the pilot reamer (7) reaming according to the trajectory of the pilot hole comprise:
-effecting primary reaming by means of said pilot reamer (6);
flushing away the drill cuttings through the nozzles of the cutting bits of the pilot reamer (6);
guiding the conical reamer (7) to ream according to the track of the guide hole through the guide reamer (6);
flushing away the drill cuttings through the nozzles of the cutting bits of the conical reamer (7).
Optionally, the construction method further includes:
determining the geology of the installation of the pipeline (10), wherein the geology is used for indicating the difficulty level of the formation of the stratum;
and determining the shape of a cutting bit of the conical reamer (7) according to the geological condition, wherein the shape of the cutting bit comprises a cutting type and a tooth wheel type.
Optionally, the external shape of the conical reamer (7) is a stepped shape.
Optionally, flushing fluid enters the cutting site from the top end of the drill rod (5) and exits from the space between the drill rod (5) and the pilot hole.
Optionally, the push bench (14) provides a first weight on bit for the conical reamer (7);
the horizontal directional drilling machine (1) provides a second weight on bit for the conical reamer (7);
wherein the sum of the first weight-on-bit and the second weight-on-bit is the total weight-on-bit of the conical reamer (7).
Optionally, said passing said pipe (10) through said push (14) at the unearthed end, comprises:
-placing the pipe (10) at the unearthed end into a pipe gripping device of the pipe pusher (14);
connecting the pipe clamping device with a main push oil cylinder of a pipe pushing machine (14);
the control circuit is communicated between the pipe pushing machine (14) and the pipe pushing machine control chamber (11);
and the oil pipeline is communicated between the pipe pushing machine (14) and the pipe pushing machine power station (12).
The beneficial effects brought by the technical scheme provided by the embodiment of the application can include:
the method and the device can combine the horizontal directional drilling machine and the pipe pushing machine, replace a pipe pushing machine head in direct pipe laying construction by the conical reamer, and control the horizontal directional drilling machine to conduct guide hole construction according to a design curve. After the construction of the guide hole is completed, a subsequent reaming direction track is provided for the horizontal directional drilling machine. When the pipeline is laid, the pipe pushing machine provides the thrust of reaming bit pressure and pipeline installation, so that one-time reaming back dragging of the horizontal directional drill is realized, and the pipeline installation is completed. The installation method disclosed by the application is wide in geological range, and especially, the installation construction of the pipeline can be realized at the terminal of the weak cementation bottom layer which is difficult to construct by horizontal directional drilling.
Drawings
In order to more clearly describe the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a guiding pipe pushing construction principle and an apparatus composition provided by an embodiment of the present application;
FIG. 2 is a flow chart of a guided push pipe installation construction method provided by the embodiment of the application;
fig. 3 is a front view of a pilot reamer as provided by embodiments of the present application;
FIG. 4 is a front view of a conical reamer as provided by embodiments of the present application;
figure 5 is a side view of a conical reamer as provided by embodiments of the present application.
The various reference symbols referred to in figures 1 to 4 are respectively:
the drilling machine comprises a 1-horizontal directional drilling machine, a 2-directional drilling machine control room, a 3-directional drilling machine power station, a 4-mud subsystem, a 5-drill rod, a 6-guide reamer, a 7-conical reamer, an 8-transfer case, a 9-drag reduction sleeve, a 10-pipeline, an 11-pipe pusher control room, a 12-pipe pusher power station, a 13-ground anchor, a 14-pipe pusher, a 15-drill collar, a 16-wear-resistant belt, a 17-guide reamer shell, an 18-cutting tool bit, a 19-conical seal, a 20-drill chip diversion trench and a 21-conical reamer shell.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
In the description of the present application, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. Further, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating a guiding pipe pushing construction principle and an apparatus according to an embodiment of the present disclosure. As shown in fig. 1, the push tube installation system includes: the method comprises the following steps of 1-horizontal directional drilling machine, 2-directional drilling machine control room, 3-directional drilling machine power station, 4-mud subsystem, 5-drill rod, 6-guide reamer, 7-conical reamer, 8-transfer case, 9-drag reduction sleeve, 10-pipeline, 11-pipe pusher control room, 12-pipe pusher power station, 13-ground anchor and 14-pipe pusher. The functions of each device are described as follows:
horizontal directional drilling machine (1): the torque is provided for pilot hole construction and later reaming.
Directional drilling machine control room (2): for placing equipment for controlling a horizontal directional drilling machine (1). In a possible way, the horizontal directional drilling machine (1) is a device requiring personnel to participate in control, and the directional drilling machine control room (2) is simultaneously reserved with a space for personnel to control. The directional drilling machine control room (2) can also provide living space for personnel. In another possible way, the horizontal directional drilling machine (1) is an apparatus that does not require human involvement for control. In this scenario, the directional drilling machine control room (2) is provided with monitoring equipment for monitoring the horizontal directional drilling machine and maintenance equipment for maintaining the horizontal directional drilling machine.
Directional drilling machine power station (3): for providing energy support to a horizontal directional drilling machine (1). In one possible approach, the directional drilling machine power station (3) provides oil ways to the horizontal directional drilling machine (1) to provide power to the horizontal directional drilling machine (1). In another possible way, the directional drilling machine power station (3) provides a high-voltage circuit to the horizontal directional drilling machine (1) for the horizontal directional drilling machine (1) using electric energy to obtain power.
Mud subsystem (4): comprises a mud pump and a cavity or a pipeline for mud to flow. The mud subsystem is used for washing away drill cuttings, and the mud subsystem is used for cooling down a guide reamer (6) or a conical reamer (7) at a cutting operation position.
Drill rod (5): the structure is a hollow structure. The hollow structure of the drill rod (5) can guide the slurry or flushing liquid sprayed by the mud pump to the top end of the drill rod. The mud or flushing liquid will flow out of the space between the drill rod (5) and the pilot hole.
Guide reamer (6): for pre-reaming and guiding a reaming path of a cone reamer in the earth formation.
Conical reamer (7): for cutting the formation and reaming. Through cascaded shape design in this application, can make the reaming process once accomplish, long time and improved reaming efficiency of technology have been reduced.
Optionally, the weight-on-bit received on the cone reamer (7) comprises a first weight-on-bit provided by the push (14) and a second weight-on-bit provided by the horizontal directional drilling machine (1).
Transfer case (8): for preventing rotation of the pipe (10) with rotation of the conical reamer (7).
Drag reduction sleeve (9): for providing a mud jacket around the installed pipe (10) to reduce frictional drag.
Duct (10): for a pipe to be installed in a formation. In an example, the diameter of the pipe may be 1016mm, and the pipe may be a pipe with other dimensions, which is not limited in the embodiments of the present application.
Tube pusher control room (11): control equipment for placing a tube pusher (14). In another possible mode, the pipe pushing machine control room (11) can also be used for placing maintenance equipment of the pipe pushing machine (14).
Tube pushing machine power station (12): used for providing power for the pipe pushing machine (14). In one mode, the pipe pusher power station (12) may provide oil to the pipe pusher (14) to facilitate power extraction by the pipe pusher (14). In another possible mode, the pipe pusher power station (12) can also provide electric energy to the pipe pusher (14).
Ground anchor (13): the anchoring device is used for anchoring the pipe pushing machine (14), so that the reaction force of the pipe pushing machine (14) in working is counteracted, and the pipe pushing machine (14) is prevented from generating displacement and influencing the pipe pushing effect.
Tube pusher (14): for pushing the pipe (10) into the tubular space reamed by the conical reamer (7).
Referring to fig. 2, fig. 2 is a flowchart of a guiding push pipe installation construction method according to an exemplary embodiment of the present application. The guiding push pipe installation construction method can be applied to the terminal shown in the figure 1. In fig. 2, the guide type push pipe installation construction method includes:
and step 201, controlling the horizontal directional drilling machine (1) to carry out guide hole construction according to a design curve.
And 202, when the guide hole is penetrated, coupling the drill rod (5) and the guide reamer (6).
Illustratively, before the guide reamer (6) and the conical reamer (7) are coupled, a constructor can confirm geological conditions and determine the shape of a cutting bit of the conical reamer (7) according to the geological conditions. Specifically, a constructor can determine the geological condition of the pipeline (10) installation, and the geological condition is used for indicating the difficulty of pore forming of the stratum; according to geological conditions, the shape of a cutting bit of the conical reamer (7) is determined, and the shape of the cutting bit comprises a cutting type and a tooth wheel type.
In another application scenario, the external shape of the conical reamer (7) is a stepped shape. Illustratively, this shape facilitates a one-time expansion of the diameter of the hole to the diameter required for installation of the pipe (10).
And step 204, coupling the conical reamer (7) and the transfer case (8).
And step 205, connecting the transfer case (8) with the pipeline (10) through a drag reduction sleeve (9), wherein the drag reduction sleeve (9) is sleeved on the periphery of the pipeline (10) and reduces the friction resistance through mud.
At the unearthed end, the pipeline (10) is run through a pipe pusher (14), step 206.
In the present application, a construction worker may complete the process of threading a pipe (10) through a pusher (14) by the following steps. Placing the pipeline (10) into a pipe clamping device of a pipe pushing machine (14) at the unearthed end; connecting the pipe clamping device with a main push oil cylinder of a pipe pushing machine (14); a control circuit communicated between the pipe pushing machine (14) and the pipe pushing machine control chamber (11); an oil pipeline communicated between the pipe pushing machine (14) and the pipe pushing machine power station (12).
And step 207, controlling the pipe pushing machine (14) to apply pushing force to the pipeline (10).
And 208, controlling the horizontal directional drilling machine (1) to provide cutting torque for the conical reamer (7) through the drill rod (5).
And step 209, controlling the conical reamer (7) to rotate and cut the substances in the stratum.
And step 210, primary reaming is realized by guiding the reamer (6) and the conical reamer (7) is guided to ream according to the track of the pilot hole.
Optionally, the reaming process may be implemented as a primary reaming by guiding the reamer (6); flushing away the drill cuttings through nozzles guiding cutting bits of the reamer (6); guiding the conical reamer (7) to ream according to the track of the guide hole through the guiding reamer (6); the drill cuttings are flushed away by the nozzles of the cutting bits of the conical reamer (7).
And step 211, when the conical reamer (7) completes reaming on the track of the guide hole, installing the pipeline (10) in the pipe-shaped space expanded by the conical reamer (7).
In step 211, this construction step may be replaced by the following construction process. When the conical reamer (7) advances by a unit stroke N under the action of the pipe pushing machine (14), the horizontal directional drilling machine (1) stops applying back dragging force and cutting torque to the guide reamer (6) and the conical reamer (7); the pipe clamping device of the pipe pushing machine (14) is controlled to release the pipeline (10).
Optionally, in a construction method, the method further comprises the steps of obtaining a unit stroke M of the horizontal directional drilling machine (1), wherein M is a positive number; acquiring unit travel N of a pipe pushing machine (14), wherein N is a positive number; according to the unit stroke M of the horizontal directional drilling machine (1) and the unit stroke N of the pipe pushing machine (14), the stroke of the horizontal directional drilling machine (1) is matched with the stroke of the pipe pushing machine (14).
The process of the stroke matching can be specifically executed to obtain a target time length T required by a unit stroke N of the pipe pusher (14); the travel of the horizontal directional drilling machine (1) in the target time length T is adjusted to be N. The target time period T may be a value preset by a designer.
In summary, according to the guiding pipe pushing installation construction method provided by this embodiment, the horizontal directional drill and the pipe pushing machine can be combined, the pipe pushing machine head in the direct pipe laying construction is replaced by the conical reamer, and the horizontal directional drill is controlled to perform the guide hole construction according to the design curve. After the construction of the guide hole is completed, a subsequent reaming direction track is provided for the horizontal directional drilling machine. When the pipeline is laid, the pipe pushing machine provides the thrust of reaming bit pressure and pipeline installation, so that one-time reaming back dragging of the horizontal directional drill is realized, and the pipeline installation is completed. The installation method disclosed by the application is wide in geological range, and especially, the installation construction of the pipeline can be realized at the terminal of the weak cementation bottom layer which is difficult to construct by horizontal directional drilling.
In one possible embodiment of the present application, the conduit (10) is described as being a conduit of diameter 1016.
The horizontal directional drilling machine comprises a horizontal directional drilling machine (1) used for providing torque during pilot hole construction and later reaming, a conical reamer (7) used for cutting a stratum to realize reaming, and a pipe pushing machine (14) used for providing most of drilling pressure for the conical reamer and providing thrust for pipeline installation. Besides, the device also comprises necessary supporting equipment for guiding the large and small aperture transition, such as a reamer (6), a transfer case (8), a directional drilling machine control room (2), a directional drilling machine power station (3), a slurry system (4), a drag reduction sleeve (9), a pipeline (10), a pipe pushing machine control room (11), a pipe pushing machine power station (12), a ground anchor (13), a pipe pushing machine (14) and the like.
Taking the pipe pushing construction of a pipeline with the diameter of phi 1016mm as an example, the horizontal directional drilling machine (1) firstly performs guide hole construction according to a design curve according to design requirements, a guide reamer (6) is connected with a drill rod (5) after the guide hole is communicated, the guide reamer (6) is connected with a conical reamer (7), the conical reamer (7) is connected with a transfer case (8), and the transfer case (8) is connected with the pipeline with the diameter of phi 1016mm (10) through a resistance reducing sleeve (9).
After the pipe clamping device of the pipe pushing machine (14) is opened at the unearthed end, the pipe clamping device is placed in a pipeline (10) with the diameter of phi 1016mm through a lifting appliance, and the pipe clamping device is connected with a main pushing oil cylinder of the pipe pushing machine (14). The pipe pushing machine (14) is further connected with a pipe pushing machine control room (11) and a pipe pushing machine power station (12) through an oil pipeline and a control circuit. And after the installation of the pipe pushing machine (14) is finished, starting guide type pipe pushing construction. During the installation and construction of the pipeline with the diameter of phi 1016 mm. The resistance to be overcome by the installation of the pipeline is mainly provided by the pipe pusher (14). The purpose of the pilot reamer (6) is to perform primary reaming and pilot the back end cone reamer (7) to ream in accordance with the trajectory of the pilot hole. The drag reduction sleeve (9) provides a mud sleeve for the periphery of the installed pipeline (10) to reduce the friction resistance.
During construction, the push bench (14) and the horizontal directional drilling machine (1) provide weight on bit applied to the conical reamer (7) and overcome frictional resistance of the installed phi 1016mm pipe (10). The reaction force of the pipe pushing machine (14) is provided by the ground anchor (13). The cone reamer (7) rotates to cut the reamer, and the cutting torque comes from the torque provided by the horizontal directional drilling machine (1) transmitted through the drill rod (5). The mud pump feeds mud through the drill stem (5) into the pilot reamer (6) and the cone reamer (7) and through the nozzles that guide the cutting bits (18) of the reamer (6) and the cone reamer (7) into the annulus of the bore hole. The cuttings cut by the cone reamer (7) pass through the cuttings chute (20) and are carried out of the ground by the mud through the annulus between the drill pipe (5) and the pilot bore. The horizontal directional drilling machine (1) keeps a certain pull-back force while reaming, and the pipe pusher (14) pushes the pipeline (10) into the reamed hole. When the pipeline is pushed into the pipe pushing machine (14) for one stroke, the drilling machine stops applying back dragging force and torque to the guide reamer (6) and the conical reamer (7), and the pipe clamping device of the pipe pushing machine (14) releases the pipeline (10) and resets the pipe clamping device to be ready for the next pipe pushing. Wherein, the pipe pushing machine (14) can reach the condition that the drill rod (5) is unloaded by the horizontal directional drilling machine (1) every two times (the stroke of the pipe pushing machine is 5 meters, and the drill rod is 9.6 meters). When the drill rod (5) of the horizontal directional drilling machine (1) is replaced, the pipe pushing machine (14) stops applying the thrust. The pipe pushing machine (14) also needs to be reset to the maximum stroke for preparing the next pipe pushing. And the above steps are repeated until the pipeline is pushed out of the hole, and the pipeline installation is completed.
In summary, the guiding push pipe installation construction method can be used for forming the reaming hole in one step, the pipeline can be directly pulled back for installation, and the working procedures are saved.
Optionally, the diameter of the hole enlargement of the installation pipeline can be 1.2-1.5 times of the diameter of the installation pipeline by adopting a horizontal directional drilling process, and the diameter of the hole enlargement is only 50-100mm larger than the diameter of the installation pipeline by adopting the method, so that the hole enlargement earthwork amount is greatly reduced, the mud consumption is saved, and the ground surface settlement can be well controlled.
Optionally, this application can also return the pipeline of dragging when the piping erection and have certain supporting role to the pore wall of pore-forming to form mud drag reduction cover, reduce the installation resistance. The pipe pusher provides drilling pressure and pipeline installation thrust for pipeline installation, and the back-dragging capability of the horizontal directional drilling machine is enhanced.
Optionally, this application can also regard as mud slagging passageway with the guiding hole for the area of overflowing is littleer than former conventional reaming. Therefore, the same mud flow and flow rate are faster, and the drill cuttings removing capacity is stronger. And a smaller mud pump can meet the construction requirement and has lower requirement on energy consumption.
Optionally, the section of the formed hole is regular and standard, the size of the formed hole is controllable, and the problem of overlarge height difference between the upper part and the lower part of the formed hole caused by repeated reaming and hole washing of the horizontal directional drill can be effectively avoided.
In another possible embodiment of the present application, the following construction scheme is provided:
excavating a working pit at the unearthed end, manufacturing a pipe pushing machine ground anchor and installing the pipe pushing machine;
the horizontal directional drilling machine carries out guide hole construction according to a design track, so that the reaming track is ensured to be consistent with the design track;
and (5) reaming the push pipe. The drilling machine is connected with the guide reamer, the conical reamer and the transfer case in sequence through a drill rod, the transfer case is connected with the drag reduction sleeve, the drag reduction sleeve is welded with the installed steel pipe, and the installed steel pipe penetrates through the pipe pushing machine at the unearthing end and extends outwards through the roller carrier.
According to the technical scheme, a slurry circulating system is required to be arranged on one side of the horizontal directional drilling machine, lubricating slurry sequentially extends to the guide reamer (6), the conical reamer (7), the transfer case (8) and the drag reduction sleeve (9) through the hollow drill rod and is sprayed to an annular space between the shell and the hole wall to form a slurry lubricating sleeve, and the friction resistance of the steel pipe is reduced.
According to the technical scheme, the pipe pushing machine pushes the steel pipe to transmit the pushing force to the conical reamer, and meanwhile, the horizontal directional drilling machine at the soil entering end enables the conical reamer to rotate through the drill pipe and keeps certain pulling force. The pilot reamer is used for pre-reaming and guiding the reaming path of the cone reamer.
According to the technical scheme, the diameter of the guide reamer is smaller than that of the conical reamer, wherein the conical reamer is in a stepped shape and is divided into a cutting type and a tooth wheel type according to geological conditions. The guide reamer and the conical reamer are both provided with cutting nozzles, and mud flushes drilling through nozzles of the cutting bits and cools the guide reamer and the conical reamer.
According to the technical scheme, the pipe pushing machine and the horizontal directional drilling machine are required to be matched for construction, so that the hole expanding efficiency is improved. Namely 2 strokes of the pipe pushing machine are matched with 1 stroke of the horizontal directional drilling machine.
In another possible embodiment of the present application, the following construction scheme is provided:
the method can realize direct pipeline installation in large-caliber directional drilling construction. The method is characterized in that a horizontal directional drilling machine and a pipe pushing machine device are combined, a process of multiple hole expanding and washing is removed, the hole diameter of the pipeline back dragging is expanded in place at one time, and the direct installation of the metal pipeline is realized. Belongs to the technical field of trenchless excavation. The construction method includes but is not limited to the following equipment: the horizontal directional drilling machine is used for realizing pilot hole drilling and providing torque for the conical reamer, the conical reamer used for cutting the stratum to realize reaming, and the pipe pushing machine used for providing most of drilling pressure for the conical reamer and providing thrust for pipeline installation. Besides, the system also comprises necessary corollary equipment such as a guide reamer for large-aperture and small-aperture transition, a transfer case, a mud system, a drag reduction system and the like. The construction method comprises the following processes: (1) construction preparation; (2) constructing a guide hole; (3) mounting drilling tools such as a conical reamer and a transfer case; (4) the drilling tool is connected with the installed pipeline; (5) cutting, reaming and installing a push pipe; (6) if the pipeline is divided into a plurality of sections, the pipeline is required to be connected with the previous section of pipeline; (7) the pipeline installation is finished; (8) and (5) recovering the field.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only exemplary of the implementation of the present application and is not intended to limit the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The guiding type push pipe installation construction method is applied to a push pipe installation system, the push pipe installation system comprises a horizontal directional drilling machine (1), a directional drilling machine control room (2), a directional drilling machine power station (3), a mud subsystem (4), a drill rod (5), a guiding reamer (6), a conical reamer (7), a transfer case (8), a resistance reducing sleeve (9), a pipeline (10), a push pipe machine control room (11), a push pipe machine power station (12), a ground anchor (13) and a push pipe machine (14), and the method comprises the following steps:
controlling the horizontal directional drilling machine (1) to carry out guide hole construction according to a design curve;
-coupling the drill rod (5) and the pilot reamer (6) when the pilot hole is through;
coupling the pilot reamer (6) and the conical reamer (7);
coupling the conical reamer (7) and the transfer case (8);
the transfer case (8) is connected with the pipeline (10) through the drag reduction sleeve (9), and the drag reduction sleeve (9) is used for being sleeved on the periphery of the pipeline (10) and reducing friction resistance through mud;
passing the pipe (10) through the push (14) at the unearthed end;
controlling the pipe pusher (14) to apply a pushing force to the pipe (10);
controlling the horizontal directional drilling machine (1) to provide a cutting torque to the conical reamer (7) through the drill rod (5);
controlling the conical reamer (7) to rotationally cut material in the formation;
primary reaming is realized through the guide reamer (6) and the conical reamer (7) is guided to ream according to the track of the guide hole;
when the conical reamer (7) completes reaming on the track of the guide hole, the pipeline (10) is installed in a pipe-shaped space expanded by the conical reamer (7).
2. The construction method according to claim 1, further comprising:
acquiring a unit stroke M of the horizontal directional drilling machine (1), wherein M is a positive number;
acquiring unit travel N of the pipe pushing machine (14), wherein N is a positive number;
according to the unit stroke M of the horizontal directional drilling machine (1) and the unit stroke N of the pipe pushing machine (14), the stroke of the horizontal directional drilling machine (1) is matched with the stroke of the pipe pushing machine (14).
3. The construction method according to claim 2, wherein said matching the stroke of the horizontal directional drilling machine (1) and the stroke of the pipe pusher (14) according to the unit stroke M of the horizontal directional drilling machine (1) and the unit stroke N of the pipe pusher (14) comprises:
acquiring a target time length T required by a unit stroke N of the pipe pusher (14);
adjusting the stroke of the horizontal directional drilling machine (1) in the target time length T to be N.
4. A construction method according to claim 3, wherein said installing the pipe (10) in the tubular space expanded by the cone reamer (7) when the cone reamer (7) completes reaming on the trajectory of the pilot hole comprises:
when the conical reamer (7) advances by a unit stroke N under the action of the pipe pushing machine (14), the horizontal directional drilling machine (1) stops applying back dragging force and cutting torque to the guide reamer (6) and the conical reamer (7);
controlling a pipe clamping device of the pipe pushing machine (14) to release the pipeline (10).
5. The construction method according to claim 2, wherein said primary reaming by said pilot reamer (6) and pilot reaming by said cone reamer (7) according to the trajectory of said pilot hole comprises:
-effecting primary reaming by means of said pilot reamer (6);
flushing away the drill cuttings through the nozzles of the cutting bits of the pilot reamer (6);
guiding the conical reamer (7) to ream according to the track of the guide hole through the guide reamer (6);
flushing away the drill cuttings through the nozzles of the cutting bits of the conical reamer (7).
6. The construction method according to claim 5, further comprising:
determining the geology of the installation of the pipeline (10), wherein the geology is used for indicating the difficulty level of the formation of the stratum;
and determining the shape of a cutting bit of the conical reamer (7) according to the geological condition, wherein the shape of the cutting bit comprises a cutting type and a tooth wheel type.
7. The construction method according to claim 1, wherein the outer shape of the conical reamer (7) is a stepped shape.
8. A method according to claim 1, characterized in that flushing fluid is conducted from the tip of the drill rod (5) into the cutting site and out of the space between the drill rod (5) and the pilot hole.
9. The construction method according to claim 1, wherein the pipe pusher (14) provides a first weight on bit for the conical reamer (7);
the horizontal directional drilling machine (1) provides a second weight on bit for the conical reamer (7);
wherein the sum of the first weight-on-bit and the second weight-on-bit is the total weight-on-bit of the conical reamer (7).
10. The construction method according to claim 1, wherein said passing said pipe (10) through said push (14) at the unearthed end comprises:
-placing the pipe (10) at the unearthed end into a pipe gripping device of the pipe pusher (14);
connecting the pipe clamping device with a main push oil cylinder of a pipe pushing machine (14);
the control circuit is communicated between the pipe pushing machine (14) and the pipe pushing machine control chamber (11);
and the oil pipeline is communicated between the pipe pushing machine (14) and the pipe pushing machine power station (12).
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| CN202010868499.3A CN114109422B (en) | 2020-08-26 | 2020-08-26 | Guide type push pipe installation construction method |
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| CN114109422B (en) | 2024-03-26 |
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