JPS58101999A - Correcting of hole curve in horizontal distance drilling method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hole correction method in a horizontal long-distance excavation method.

Conventional methods for burying gas pipes, water pipes, etc. in roads with heavy traffic or in urban areas are known as methods in which the buried pipes are excavated horizontally over long distances using trenchless methods. This method can be roughly divided into rotary drilling type and non-rotating pushing type, but in either case, highly accurate horizontal straightness is required, and during this rounding excavation, hole drilling is often required. Corrections need to be made.

The conventional method for correcting this hole is to correct the hole by installing multiple hydraulic jacks between the cutting edge and the casing and changing the direction of the cutting edge.

(2) A method of correcting holes using a pilot head that incorporates an instrument for detecting holes and a jack for swinging the cutting edge at the tip of the casing is known.

However, in method (2) above, the longitudinally short blade edge is corrected using a hydraulic cylinder, which may be difficult to correct depending on the age of the blade. In addition, method (2) above uses a long pilot head, which solves the problem of method (2) above, but since the pilot head is connected to the pi-four pipe by a hinge clasp, there is no dirt in the cutting edge. The pressure tends to cause holes to be drilled, thus requiring frequent correction of the holes, which reduces excavation efficiency. Moreover, this method has a hydraulic cylinder, a bend detector, and a moving part at the tip, which tends to cause problems, especially in the case of long-distance propulsion.

Furthermore, since all of the methods described in ■■ above use hydraulic cylinders, the hydraulic hoses used to drive them are also long for long-distance propulsion, and if accidents such as hydraulic leakage occur,
Restoration required a large amount of money and time.

The present invention solves such conventional disadvantages by rounding.
This was proposed as a result of the study, and it is an attempt to provide a method that does not require complicated equipment and can easily and accurately correct the perforation.

An embodiment of the present invention will be described below with reference to the accompanying drawings.
First, in the present invention, as shown in FIG. 1, vertical shafts 1.2 are created on the starting and reaching sides of the buried pipe, an excavator 3 is installed in the starting shaft 1, and a pilot hole leading to the reaching shaft 2 is excavated. For this excavation, in the present invention, an outer pipe 4 as shown in Fig. 2 and below is used.
and inner tube 5 are used.

The outer tube 4 is composed of a casing rod 6 and a pilot casing 7 connected to the tip of the casing rod. The pilot casing 7 has a slightly larger diameter than the casing rod 6, and a casing bit 8 having the same diameter as the pilot casing 1 is provided at its tip. Furthermore, the inner tube 5 has a casing rod 6
It is inserted into the outer tube 4 via the stuffy ink box 9 attached to the rear end, and an auger-shaped spiral stabilizer 10 is attached to the tip side thereof.
At its tip, an auger bit 11 and an inner bit 12, which can be attached to and detached from the inner tube, are attached.

The outer pipe 4 and the inner pipe 5 are rotated in opposite directions Kfl by respective drive devices 3 and 3a of the excavator 3. As a result, the machine advances horizontally while excavating underground with each bit 8, 11, and 12, while a plurality of casing rods 4 and inner pipes 5 are connected from the starting shaft 1. .

In the present invention, as described above, a predetermined length of, for example, 10
After drilling a pilot hole (every m), hole opening detection is first performed. As a method of this invention, as shown in FIG. 2, in the present invention, a hole measuring device 13 is pumped with water into the inner tube 5 to measure the inclination and orientation of the tip. The hole measuring instruments used here include gyro-type incremeters and magnetic single-shot inclinometers.
Either method may be adopted in the present invention. In the case of this embodiment, the measuring device 13 is recovered by the wire 15 using the hoist 14.
This is done by winding up.

The hole opening is measured using this method, and the orientation (
The hole opening is corrected at the time of displacement of, for example, 1° GO' from the conjugate fixed value (left and right) and inclination (up and down).

That is, in the present invention, after the inner bit 12 at the tip of the inner tube is recovered with the wire 2-in, the dyna drill 16 is inserted into the inner tube 5 as shown in FIG. An appropriate bend of this DynaDrill 16 is selected according to the above-mentioned measurement value, and by protruding the DynaDrill 16 from the tip of the inner pipe and rotating the drill rod, drilling is performed to correct the curvature of the pilot hole. do.

Thereafter, the hole-drilling measuring device 13 is pumped into the Dyna Drill 11 in the same manner as described above, and the corrected bending angle is measured.

In the present invention, after performing preliminary polling with the dyna drill 16 as described above, the inner tube 5 is rotated as shown in FIG. Do the following. Next, the outer tube 4 is rotated, and the hole is enlarged (with the casing bit 8 of the outer tube) using the spiral stabilizer 10 of the inner tube 5 as a guide. In addition, in the present invention, the inner tube 5 and the outer tube 4 may be rotated at the same time to expand the hole.

After performing such correction of the hole surface, the hole surface 9 measuring device 13 is pumped to confirm the degree of correction again, and then the dyna drill 16 is recovered and the inner bit 12 is inserted to prepare for the next drilling. It is something to do.

According to the present invention as described above, there is no need to equip the tip of the casing with a complicated correction device as in the past, and troubles associated with these devices are also eliminated, making it possible to correct the hole surface very efficiently and with high accuracy. This invention is particularly effective when excavating small diameter pipes over long distances (for example, over 500 m).

[Brief explanation of the drawing]

Figure 1 is a schematic diagram for explaining the horizontal long-distance cutting method.
Figures 2 to 5 are all schematic diagrams for explaining the present invention in detail. Figure 2 shows the state of hole bend p measurement, Figure 3 shows the state of advance poling with Dyna Drill, and Figure 4 shows the inner pipe. Figure 5 shows the hole expansion situation in the outer tube. In the figure, 4 is an outer tube, 5 is an inner tube, 13 is a hole bending measuring device, and 16 is a Dynadrill. Applicant: Nippon Steel Tube Co., Ltd. Koken Drilling Co., Ltd. Toko Co., Ltd. Inventor: Eto Beto Co., Ltd.
Kodama Calibration
Big Deer Spring Bema Flower
1) Written amendment to the formal proceedings dated 2nd May, 1925 (Showa 4Z) Commissioner of the Japan Patent Office (Mr. Kazuo Wakasugi (Patent + 1 Examiner))
4, (II: Embedded (412) Nippon Kokan Co., Ltd. 2
Name 5 Date of amendment order -- 1 Amendment contents 1 The following is corrected under the scope of "Claims 41" of the present application. 1.Turn the inner tube with the tip ISK bit and the outer tube to drill horizontally underground. To,
A method for correcting a hole in a horizontal long-distance excavation method, in which the hole is enlarged by advancing the inner and outer pipes by digging to correct the bending of the hole by protruding from the tip of the pipe with a rod shape. ” In the Yumoto MwA specification, page 3, line 20, the words “for buried pipes” are corrected to “for pilot hole drilling.” 0.3 Same book, page 4, line 15, Correct it as Spike Luo #IQJ. Kodosho, page 4, end of line 2Q to line 5-1, 1 [K is applied as "They are rotated in opposite directions to each other. A and A are made to rotate once." correct. Please make the following corrections from lines 4 to 8 on page 6 of the same book. As shown in rac+, Kl in this inner tube S! Insert the O-tosill 16fe for IIJ correction. This drill 16 includes a main body 17 which is rod-shaped and has a vent housing 1111111!71 (bent housing) formed at the tip 111, and a body 18 which is rotatably provided at the tip of the main body.
C) The curve n5171 is selected to have an appropriate bending angle according to the measured value. By making such a drill 16 protrude from the tip of the inner tube and rotating the bit 18, it is possible to do so.''
After 1KtP, end of line 15 ~ 1 @ line 11111111
Multiply K and correct "Dyna Drill 16" to "R Drill 16" respectively. ``Spiral stabilizer'' in page 6, line 18 of the same book is corrected to read ``Riser IOJ'' and ``Ruru VTR Spiral Auger 10J''. Well, the same book I! Page 7, page 5, line, "Inadryl 16" is corrected to read r drill 16J. The following is added between lines 7 and 8 on page 7 of the same book. As the drill 16 for performing preliminary polling to correct the hole l11υ, any suitable type, such as the so-called Dyna Drill T, can be used. When installed, a bit with a diameter larger than the diameter of the main body is provided at the tip of the bit 18, and the bit 18 is rotated by the power transmitted within the rod-shaped main body. Water is supplied to the face through the main body 17.In the case of the Dyna Drill described above, the tip @KIIA spiral Oa-tar is rotatably provided in the main body, and water is supplied to the face through the main body. 10. At the end of the 20th line of page F of the same book, there is a line that says ``Dyna Drill''/. Correct it to r drill 1. /l On page 8, line S of the same book, the statement ``It is a 16 Hiro Dyna Drill.'' is corrected to ``It is a 16 Mine Drill.'' In the accompanying drawings, the reference numeral K is additionally inserted in Figures 3, 4, and 5 as shown in red on the attached sheet. Procedural Amendment Written by the Commissioner of the Patent Office Mr. Kazuo Wakasugi (Mr. Patent Office Examiner)
3 Relationship with the case of the person making the amendment Patent applicant (412) Nippon Kokan Co., Ltd. 4, Contents of the amendment by agent 7 Procedural amendment document dated December 2, 1982 as attached 1.1 Commissioner of the Japan Patent Office Kazuo Wakasugi Dear (Patent Office Examiner)
1 Indication of the case 1937 Patent Application No. 1171 Tada No. 78 3,
Relationship with the case of the person making the amendment 4 agents for patent applicants

Claims (1)

[Claims] When drilling horizontally underground by rotating the inner tube, which has a bit at the tip as well as the outer tube, which has a bit at the tip, the dyna drill is inserted into the inner tube after measuring the curvature of the drilling hole. The horizontal length is characterized in that the dyna drill is protruded from the tip of the inner tube to perform drilling to correct the hole, and then the inner tube and the outer tube are advanced along the dyna drill to expand the hole. Hole correction method in distance cutting method.