FI127492B - Percussive drill tool - Google Patents

Percussive drill tool Download PDF

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Publication number
FI127492B
FI127492B FI20155092A FI20155092A FI127492B FI 127492 B FI127492 B FI 127492B FI 20155092 A FI20155092 A FI 20155092A FI 20155092 A FI20155092 A FI 20155092A FI 127492 B FI127492 B FI 127492B
Authority
FI
Finland
Prior art keywords
drill
tool
adapter
drill bit
bit assembly
Prior art date
Application number
FI20155092A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI20155092A (en
Inventor
Joonas Sokka
Mika Koskinen
Antti Leino
Original Assignee
Oy Robit Rocktools Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oy Robit Rocktools Ltd filed Critical Oy Robit Rocktools Ltd
Priority to FI20155092A priority Critical patent/FI127492B/en
Priority to PCT/FI2016/050082 priority patent/WO2016128618A1/en
Publication of FI20155092A publication Critical patent/FI20155092A/en
Application granted granted Critical
Publication of FI127492B publication Critical patent/FI127492B/en

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Classifications

    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
    • E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
    • E21B47/017—Protecting measuring instruments
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042—Threaded
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/02—Determining slope or direction
    • E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics (AREA)
  • Remote Sensing (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Earth Drilling (AREA)

Abstract

The invention relates to a drill tool for percussive drilling. The drill tool has a drill string assembly (1), a drill bit assembly (2), a central flushing channel (3), and a borehole survey tool (4) in the central flushing channel (3). The borehole survey tool (4) is configured to obtain data of a borehole drilled by the drill tool and the borehole survey tool (4) has a transmitter (5) for transmitting signals containing data of the borehole drilled by the drill tool. The drill tool has at the borehole survey tool (4) at least one signal transparent member (6) extending between the central flushing channel (3) and a circumferential outer surface (7) of the drill tool. The invention relates also to an adapter (11), to a drill bit assembly (1), to a method for manufacturing the adapter (11), and to a method for manufacturing the drill bit assembly (1).

Description

PERCUSSIVE DRILL TOOL
Field of the invention
The invention relates to a percussive drill tool as defined in the preamble of independent 5 claim 1.
In drilling it is important to have information about the depth and the direction of the boreholes. For this purpose various borehole survey tools and methods are known in the art by which it is possible to obtain information about the depth and the direction of boreholes.
Publication WO2014/037619 presents a method for surveying drill holes and to a drilling 10 arrangement and to a borehole survey assembly. The method comprises a first providing step for providing a drill tool comprising at least one drill rod and a drill bit assembly, and a second providing step for providing a borehole survey tool comprising sensor means for measuring a borehole. In the method a drill tool comprising a central flushing channel for conducting flushing fluid to the drill bit assembly is used, and the borehole survey tool is arranged in the arranging step in the central flushing channel so that flushing fluid can flow in the central flushing channel past the borehole survey tool.
Publications WO 2012115778 A2, WO 2014043073 A2, US 6064210 A, US 2004104821 Al, US 2005145416 Al and US 4684946 A discuss various drilling arrangements comprising a sensor arrangement for obtaining data.
Objective of the invention
The object of the invention is to provide a drill tool for percussive drilling, an adapter, and a drill bit assembly, which provides for easy transmitting of signals containing data of the borehole drilled by the drill tool from a borehole survey tool in a central flushing channel of a drill tool.
Short description of the invention
The drill tool of the invention is characterized by the definitions of independent claim 1.
Preferred embodiments of the drill tool are defined in the dependent claims 2 to 10.
The invention is based on providing the drill tool with at least one signal transparent member extending between the central flushing channel, where the borehole survey tool is arranged, and the circumferential outer surface of the drill tool. Said at least one signal transparent member allows signals originating from the transmitter of the borehole survey tool to be transmitted from the borehole survey tool to a receiver without the need to remove the borehole survey tool from the central flushing channel of the drill tool.
List of figures
In the following the invention will described in more detail by referring to the figures, of
20155092 prh 03 -05- 2018 which
Figure 1 shows a part of a first embodiment of the drill tool,
Figure 2 shows in partly cut view the first embodiment of the drill tool shown in figure 1,
Figure 3 shows a part of a second embodiment of the drill tool,
Figure 4 shows in partly cut view the second embodiment of the drill tool shown in figure
3,
Figure 5 shows a part of a third embodiment of the drill tool,
Figure 6 shows in partly cut view the third embodiment of the drill tool shown in figure 5,
Figure 7 shows a part of a fourth embodiment of the drill tool,
Figure 8 shows in partly cut view the fourth embodiment of the drill tool shown in figure 7,
Figure 9 shows the drill bit assembly, the adapter and the borehole survey tool of the first embodiment of the drill tool shown in figures 1 and 2,
Figure 10 is another illustration of the drill bit assembly, the adapter and the borehole survey tool of the first embodiment of the drill tool shown in figures 1 and 2,
Figure 11 is still another illustration of the drill bit assembly, the adapter and the borehole survey tool of the first embodiment of the drill tool shown in figures 1 and 2,
Figure 12 shows the drill string assembly, the adapter and the borehole survey tool of the 20 third embodiment of the drill tool shown in figures 5 and 6,
Figure 13 is another illustration of the drill string assembly, the adapter and the borehole survey tool of the third embodiment of the drill tool shown in figures 5 and 6,
Figure 14 is still another illustration of the drill string assembly, the adapter and the borehole survey tool of the third embodiment of the drill tool shown in figures 5 and 6,
Figure 15 shows the drill bit assembly of the drill bit assembly of the second embodiment of the drill tool shown in figures 3 and 4 and of the third embodiment of the drill tool shown in figures 5 and 6,
Figure 16 is another illustration of the drill bit assembly of the second embodiment of the drill tool shown in figures 3 and 4 and of the third embodiment of the drill tool shown in figures
5 and 6,
Figure 17 is still another illustration of the drill bit assembly of the second embodiment of the drill tool shown in figures 3 and 4 and of the third embodiment of the drill tool shown in figures 5 and 6,
Figure 18 shows in cut-view the adapter of the first embodiment of the drill tool shown in 35 figures 1 and 2,
Figure 19 shows in cut view a detail of a drill tool, and
Figure 20 shows in cut view a detail of a drill tool.
20155092 prh 03 -05- 2018
Detailed description of the invention
First the drill tool for percussive drilling and some embodiments and variants of the drill tool will be described in greater detail.
The drill tool has a drill string assembly 1 comprising at least one drill rod, a drill bit assembly 2, and a central flushing channel 3 configured to conduct flushing fluid (not shown in the figures) to the drill bit assembly 2.
The drill tool has a borehole survey tool 4 in the central flushing channel 3. The borehole survey tool 4 is configured to obtain data of a borehole drilled by the drill tool and the borehole survey tool 4 has a transmitter 5 for transmitting signals containing data of the borehole drilled by the drill tool. The borehole survey tool 4 can be the borehole survey tool 4 presented in publication WO2014/037619, which is hereby incorporated by reference. The borehole survey tool 4 may comprise an outer casing 25 of elastomer for providing protection for the borehole survey tool 4. The elastomer is preferably transparent to signals originating from the transmitter of the borehole survey tool 4 .
The drill tool has at the borehole survey tool 4 at least one signal transparent member 6 extending between the central flushing channel 3 and a circumferential outer surface 7 of the drill tool. By transparent is meant that said at least one signal transparent member 6 is permeable to signals originating from the transmitter 5 of the borehole survey tool 4.
The borehole survey tool 4 may be suspended in the central flushing channel 3 of the drill bit assembly 2 between a first damping means 8 and a second damping means 9 so that the first damping means 8 and a second damping means 9 are pre-compressed.
Said at least one signal transparent member 6 may be configured to prevent the borehole survey tool 4 from rotating with respect to the central flushing channel 3 by being in contact with the borehole survey tool 4 inside the central flushing channel 3. Additionally or alternatively, an elongated external member 26 such as pin, a bolt or a screw may be configured to prevent the borehole survey tool 4 from rotating with respect to the central flushing channel 3 by being in contact with the borehole survey tool 4 inside the central flushing channel 3, as is shown in figure 20.
The drill tool may comprise an opening 10 extending between a circumferential outer surface 7 of the drill tool and the central flushing channel 3, and said at least one signal transparent member 6 may be provided in the opening 10 so that the signal transparent member 6 forms a part of the circumferential outer surface 7 of the drill tool. The signal transparent member 6 may be provided in the opening 10 so that the circumferential outer surface 7 of the drill tool at the signal transparent member 6 has a recess 23 at the signal transparent member 6. A purpose of the recess 23 is to protect the signal transparent member from drill cuttings (not shown in the figures). The opening may be provided with grooves 24 into which the signal transparent member 6 extend for holding the signal transparent member 6 in place in the recess 23, as is shown in figure 19. Alternatively or additionally, the opening
20155092 prh 03 -05- 2018 may taper between the central flushing channel 3 and the circumferential outer surface 7 of the drill tool in the direction towards the circumferential outer surface 7 of the drill tool in order to prevent the signal transparent member 6 from moving in a radial direction in the opening
10.
The signal transparent member 6 may be made of polymer or porous metal.
Figures 1 and 2 shows a first embodiment of the drill tool.
In this first embodiment of the drill tool, an adapter 11 is provided between the drill string assembly 1 and the drill bit assembly 2. The adapter 11 is configured to connect the drill bit assembly 2 to the drill string assembly 1. The adapter 11 has a central flushing channel section 20 forming a part of the central flushing channel 3 of the drill tool, and a circumferential outer surface 7 of the adapter 11 forms a part of the circumferential outer surface 7 of the drill tool.
In this first embodiment of the drill tool, the borehole survey tool 4 is provided in the central flushing channel section 20 of the adapter 11.
In this first embodiment of the drill tool, said at least one signal transparent member 6 is provided in the adapter 11 so that said at least one signal transparent member 6 extends between the central flushing channel section 20 of the adapter 11 and the circumferential outer surface 7 of the adapter 11.
An advantage with this first embodiment of the drill tool is that the borehole survey tool
4 can be mounted/replaced in connection with the mounting/replacing of the drill bit assembly 2.
Another advantage with this first embodiment of the drill tool is that, provided that the adapter 11 is connected to a drill string of drill string assembly 1, which drill string having a full length, the number of connections, in which percussive impact is lost, is lower.
In this first embodiment of the drill tool, the drill bit assembly 2 may be provided with a first male thread 12a on a first male section 13a configured to connect the drill bit assembly 2 to a first female thread 14a on a first female section 15a of the adapter 11. An advantage of this is that in case the drill head 21 of the drill bit assembly 2 is broken off during percussive drilling, the first male section 13a of the drill bit assembly 2 that is threaded into the first female thread 14a on the first female section 15a will prevent the borehole survey tool 4 from falling down into the borehole.
If the drill bit assembly 2 is provided with a first male thread 12a on a first male section 13a configured to connect the drill bit assembly 2 to a first female thread 14a on a first female section 15a of the adapter 11, the adapter 11 may comprise a first impact surface 16 abutting a second impact surface 17 of the drill bit assembly 2, so that the first impact surface 16 of the adapter 11 is formed of an end surface of the first female section 15a of the adapter 11, and so that the first impact surface 16 of the adapter 11 and the second impact surface 17 of the drill bit assembly 2 extends perpendicularly to a longitudinal axis of the drill tool. An advantage with this is that because the first impact surface 16 of the adapter 11 that hits on the second impact
20155092 prh 03 -05- 2018 surface 17 of the drill bit assembly 2 during percussive drilling will be formed of a female section, the drill tool will be strong.
hi this first embodiment of the drill tool, the adapter 11 may comprise a second female thread 14b on a second female section 15b configured to connect the adapter 11 to a second male thread 12b on a second male section 13b of the drill string assembly 1.
If the adapter 11 comprises a second female thread 14b on a second female section 15b configured to connect the adapter 11 to a second male thread 12b on a second male section 13b of the drill string assembly 1, an fourth impact surface 19 on the end of the second male section 13b of the drill string assembly 1, which fourth impact surface 19 extends perpendicularly to a longitudinal axis of the drill tool, may abut a third impact surface 18 on the bottom of the second female section 15b of the adapter 11, which third impact surface 18 extends perpendicularly to a longitudinal axis of the drill tool, as is shown in figures 1 and 2.
As a variant to what is shown in figures 1 and 2, if the adapter 11 comprises a second female thread 14b on a second female section 15b configured to connect the adapter 11 to a second male thread 12b on a second male section 13b of the drill string assembly 1, the adapter 11 may comprise a third impact surface 18 abutting a fourth impact surface 19 of the drill string assembly 1, so that the third impact surface 18 of the adapter 11 is formed of an end surface of the second female section 15b of the adapter 11 and so that the third impact surface 18 of the adapter 11 and the fourth impact surface 19 of the drill string assembly 1 extends perpendicularly to a longitudinal axis of the drill tool.
In this first embodiment of the drill tool, the borehole survey tool 4 may be suspended in the central flushing channel section 20 of the adapter 11 between a first damping means 8 and a second damping means 9 so that the first damping means 8 and a second damping means 9 are pre-compressed.
If the borehole survey tool 4 is suspended in the central flushing channel section 20 between a first damping means 8 and a second damping means 9 so that the first damping means 8 and a second damping means 9 are pre-compressed, the first damping means 8 may in this first embodiment of the drill tool be pre-compressed between the first male section 13a of the drill bit assembly 2 and the borehole survey tool 4.
If the borehole survey tool 4 is suspended in the central flushing channel section 20 of the adapter 11 between a first damping means 8 and a second damping means 9 so that the first damping means 8 and a second damping means 9 are pre-compressed, the second damping means 9 may in this first embodiment of the drill tool be pre-compressed between a collar 22 in the central flushing channel section 20 of the adapter 11 and the borehole survey tool 4, as is shown in figure 2. Alternatively, the second damping means 9 may be pre-compressed between the second male section 13b of the drill string assembly 1 and the borehole survey tool 4.
Figures 3 and 4 shows a second embodiment of the drill tool.
In this second embodiment of the drill tool, the drill bit assembly 2 is provided with a
20155092 prh 03 -05- 2018 third female section 15c having a third female thread 14c configured to connect the drill bit assembly 2 to a second male section 13b having a second male thread 12b of the drill string assembly 1.
In this second embodiment of the drill tool, the drill bit assembly 2 has a central flushing channel section 20 forming a part of the central flushing channel 33 of the drill tool, so that the central flushing channel section 20 is provided between a drill head 21 of the drill bit assembly 2 and the third female section 15c of the drill bit assembly 2.
In this second embodiment of the drill tool, the borehole survey tool 4 is provided in the central flushing channel section 20 of the drill bit assembly 2.
In this second embodiment of the drill tool, said at least one signal transparent member 6 is provided in the drill bit assembly 2 so that said at least one signal transparent member 6 extends between the central flushing channel section 20 of the drill bit assembly 2 and a circumferential outer surface 7 of the drill bit assembly 2.
In this second embodiment of the drill tool, the drill string assembly 1 may comprise a fourth impact surface 19 abutting a second impact surface 17 of the drill bit assembly 2, so that the second impact surface 17 of the drill bit assembly 2 is formed of an end surface of the third female section 15c of the drill bit assembly 2, and so that the fourth impact surface 19 of the drill string assembly 1 and the second impact surface 17 of the drill bit assembly 2 extends perpendicularly to a longitudinal axis of the drill tool.
In this second embodiment of the drill tool, the borehole survey tool 4 may be suspended in a central flushing channel section 20 of the drill bit assembly 2 between a first damping means and a second damping means 9 so that the first damping means 8 and a second damping means are pre-compressed.
If the borehole survey tool 4 is suspended in a central flushing channel section 20 of the drill bit assembly 2 between a first damping means 8 and a second damping means 9 so that the first damping means 8 and a second damping means 9 are pre-compressed, the first damping means 8 may this second embodiment of the drill tool be pre-compressed between a collar 22 in the central flushing channel section 20 of the drill bit assembly 2 and the borehole survey tool 4, and the second damping means 9 may be pre-compressed between the borehole survey tool 4 and the second male section 13b of the drill string assembly 1, as is shown in figure 4.
Figures 5 and 6 shows a third embodiment of the drill tool.
In this third embodiment of the drill tool, an adapter 11 is provided between the drill string assembly 1 and the drill bit assembly 2. The adapter 11 is configured to connect the drill bit assembly 2 to the drill string assembly 1. The adapter 11 has a central flushing channel section 20 forming a part of the central flushing channel 3 of the drill tool, and a circumferential outer surface 7 of the adapter 11 forms a part of the circumferential outer surface 7 of the drill tool.
In this third embodiment of the drill tool, the drill bit assembly 2 is provided with a third
20155092 prh 03 -05- 2018 female section 15c having a third female thread 14c configured to connect the drill bit assembly 2 to a third male section 13c having a third male thread 12c of the adapter 11.
In this third embodiment of the drill tool, the adapter 11 is provided with a second female section 15b having a second female thread 14b configured to connect the drill bit assembly 2 to a second male section 13b having a second male thread 12b of the drill string assembly 1.
In this third embodiment of the drill tool, the drill bit assembly 2 has a central flushing channel section 20 forming a part of the central flushing channel 3 of the drill tool.
In this third embodiment of the drill tool, the borehole survey tool 4 is provided in the central flushing channel section 20 of the drill bit assembly 2.
In this third embodiment of the drill tool, said at least one signal transparent member 6 is provided in the drill bit assembly 2 so that said at least one signal transparent member 6 extends between the central flushing channel section 20 of the drill bit assembly 2 and a circumferential outer surface 7 of the drill bit assembly 2.
In this third embodiment of the drill tool, the adapter 11 may comprise a first impact surface 16 abutting a second impact surface 17 of the drill bit assembly 2, wherein the second impact surface 17 of the drill bit assembly 2 is formed of an end surface of the third female section 15c of the drill bit assembly 2, and the adapter 11 may comprise a third impact surface 18 abutting a fourth impact surface 19 of the drill string assembly 1, wherein the third impact surface 18 of the adapter 11 being formed of an bottom surface of the second female section 15b of the adapter 11 and wherein the fourth impact surface 19 of the drill string assembly 1 being formed of an end surface of the second male section 13b of the drill string assembly 1, and wherein the first impact surface 16 of the adapter 11, the second impact surface 17 of the drill bit assembly 2, third impact surface 18 of the adapter 11, and the fourth impact surface 19 of the drill string assembly 1 extend perpendicularly to a longitudinal axis of the drill tool, as is shown in figures 5 and 6.
In this third embodiment of the drill tool, the adapter 11 may, as an alternative to what is shown in figures 5 and 6, comprise a first impact surface 16 abutting a second impact surface 17 of the drill bit assembly 2, wherein the second impact surface 17 of the drill bit assembly 2 is formed of an end surface of the third female section 15c of the drill bit assembly 2, and the adapter 11 may comprise a third impact surface 18 abutting a fourth impact surface 19 of the drill string assembly 1, wherein the third impact surface 18 of the adapter 11 being formed of an end surface of the second female section 15b of the adapter 11, and wherein the first impact surface 16 of the adapter 11, the second impact surface 17 of the drill bit assembly 2, third impact surface 18 of the adapter 11, and the fourth impact surface 19 of the drill string assembly
1 extend perpendicularly to a longitudinal axis of the drill tool.
In this third embodiment of the drill tool, the borehole survey tool 4 may be suspended in the central flushing channel section 20 of the drill bit assembly 2 between a first damping means 8 and a second damping means 9 so that the first damping means 8 and a second damping means
20155092 prh 03 -05- 2018 are pre-compressed.
If the borehole survey tool 4 is suspended in the central flushing channel section 20 of the drill bit assembly 2 between a first damping means 8 and a second damping means 9 so that the first damping means 8 and a second damping means 9 are pre-compressed, the first damping means 8 may in this third of the drill tool embodiment be pre-compressed between a collar 22 in the central flushing channel section 20 of the drill bit assembly 2 and the borehole survey tool 4, and the second damping means 9 may be pre-compressed between the borehole survey tool 4 and the third male section 13c of the adapter 11, as is shown in figure 6.
Figures 7 and 8 shows a fourth embodiment of the drill tool.
In this fourth embodiment of the drill tool, the drill bit assembly 2 is provided with a first male section 13a having a first male thread 12a configured to connect the drill bit assembly 2 to a fourth female section 15d having a fourth female thread 14d of the drill string assembly 1.
In this fourth embodiment of the drill tool, the drill string assembly 1 has a central flushing channel section 20 forming a part of the central flushing channel of the drill tool.
In this fourth embodiment of the drill tool, the borehole survey tool 4 is provided in the central flushing channel section 20 of the drill string assembly 1.
In this fourth embodiment of the drill tool, the at least one signal transparent member 6 is provided in the drill string assembly 1 so that said at least one signal transparent member 6 extends between the central flushing channel section 20 of the drill string assembly 1 and a circumferential outer surface 7 of the drill string assembly 1.
In this fourth embodiment of the drill tool, the drill string assembly 1 may comprise a fourth impact surface 19 abutting a second impact surface 16 of the drill bit assembly 2, so that the fourth impact surface 19 of the drill string assembly 1 is formed of an end surface of the fourth female section 15d of the drill bit assembly 2, and so that the fourth impact surface 19 of the drill string assembly 1 and the second impact surface 17 of the drill bit assembly 2 extend perpendicularly to a longitudinal axis of the drill tool.
In this fourth embodiment of the drill tool, the borehole survey tool 4 may be suspended in the central flushing channel section 20 of the drill string assembly 1 between a first damping means 8 and a second damping means 9 so that the first damping means 8 and a second damping means 9 are pre-compressed.
If the borehole survey tool 4 is suspended in the central flushing channel section 20 of the drill string assembly 1 between a first damping means 8 and a second damping means 9 so that the first damping means 8 and a second damping means 9 are pre-compressed, the first damping means 8 may be pre-compressed between the borehole survey tool 4 and the first male section
13a of the drill bit assembly 2, and the second damping means 9 may be pre-compressed between a collar 22 in the central flushing channel section 20 in the drill string assembly 1 and the borehole survey tool 4, as is shown in figure 8.
The invention relates also to an adapter 11 for use in the drill tool as described earlier to
20155092 prh 03 -05- 2018 connect the drill bit assembly 2 of the drill tool to the drill string assembly 1 of the drill tool.
The adapter has a first female section 15a having a first female thread 14a for connecting a drill bit assembly 2 provided with a first male section 13a having a first male thread 12a to the adapter 11.
The adapter has a second female section 15b having a second female thread 14b for connecting the adapter 11 to a second male section 13b having a second male thread 12b of the drill string assembly 1.
The adapter has a central flushing channel section 20 extending between the first female section 15a and the second female section 15b.
The adapter has at least one signal transparent member 6 extending between the central flushing channel section 20 and a circumferential outer surface 7 of the adapter 11.
The invention relates also to a drill bit assembly 2 for use in the drill tool as described earlier.
The drill bit assembly 2 has a drill head 21.
The drill bit assembly 2 a third female section 15c has a third female thread 14c for connecting a male section 13b, 13c having a male thread 12b, 13c of the drill tool to the drill bit assembly 2.
The drill bit assembly 2 a central flushing channel section 20 extending between the drill head 21 and the third female section 15c.
The drill bit assembly 2 has at least one signal transparent member 6 extending between the central flushing channel section 20 of the drill bit assembly 2 and a circumferential outer surface 7 of the drill bit assembly 2.
Next the adapter 11 for connecting a drill bit assembly 2 of a drill tool to a drill string assembly 1 comprising at least one drill rod and some embodiments and variants of the adapter
11 will be described in greater detail.
The adapter 11 has a first female section 15a having a first female thread 14a for connecting a drill bit assembly 2 provided with a first male section 13a having a first male thread 12a to the adapter 11.
The adapter 11 has a second female section 15b having a second female thread 14b for 30 connecting the adapter 11 to a second male section 13b having a second male thread 12b of the drill string assembly 1.
The adapter 11 has a central flushing channel section 20 extending between the first female section 15a and the second female section 15b.
The adapter 11 has at least one signal transparent member 6 extending between the 35 central flushing channel section 20 and a circumferential outer surface 7 of the adapter 11.
Next the drill bit assembly 2 for use in a drill tool having a drill string assembly 1 comprising at least one drill rod and some embodiments and variants of the drill bit assembly 2 will be described in greater detail.
The drill bit assembly 2 has a drill head 21.
The drill bit assembly 2 has a third female section 15c having a third female thread 14c for connecting a male section 13b, 13c having a male thread 12b, 12c of the drill tool to the drill bit assembly 2.
The drill bit assembly 2 has a central flushing channel section 20 extending between the drill head 21 and the third female section 15c.
The drill bit assembly 2 has at least one signal transparent member 6 extending between the central flushing channel section 20 of the drill bit assembly 2 and a circumferential outer surface 7 of the drill bit assembly 2.
The invention relates also to a method for manufacturing an adapter, such as an adapter for use in the drill tool, wherein the method comprises forming said at least one signal transparent member 6 by casting polymer in an opening 10 extending between the central flushing channel section 20 of the adapter 11 and a circumferential outer surface 7 of the adapter
11.
The invention relates also to a method for manufacturing a drill bit assembly, such as a drill bit assembly for use in the drill tool, wherein the method comprises forming said at least one signal transparent member 6 by casting polymer in an opening 10 extending between the central flushing channel section 20 of the drill bit assembly 2 and a circumferential outer surface 7 of the drill bit assembly 2.
It is apparent to a person skilled in the art that as technology advances, the basic idea of the invention can be implemented in various ways. The invention and its embodiments are therefore not restricted to the above examples, but they may vary within the scope of the claims.

Claims (10)

PatenttivaatimuksetThe claims 1. Iskuporaustyökalu, jolloin mainitulla poraustyökalulla on ainakin yhden poratangon käsittävä poraussarjakokoonpano (1),An impact drilling tool, wherein said drilling tool has a drilling kit assembly (1) comprising at least one drill rod, 5 poraussarjakokoonpanoon (1) liitetty poranteräkokoonpano (2), keskeinen huuhtelukanava (3), joka on konfiguroitu johtamaan huuhtelufluidia poranteräkokoonpanoon (2), ja keskeisessä huuhtelukanavassa (3) oleva porausreiän kartoitustyökalu (4), jolloin porausreiän kartoitustyökalu (4) on järjestetty hankkimaan poraustyökalun poraamaa5 drill bit assembly (1) connected to drill bit assembly (1), central flushing channel (3) configured to conduct flushing fluid to drill bit assembly (2), and drilling hole mapping tool (4) in central flushing channel (3), whereby By drilling 10 porausreikää koskevaa tietoa ja jolloin porausreiän kartoitustyökalulla (4) on lähetin (5) poraustyökalun poraamaa porausreikää koskevaa tietoa sisältävien signaalien lähettämiseen, tunnettu siitä, että poraustyökalussa porausreiän kartoitustyökalun (4) kohdalla on keskeisen huuhtelukanavan (3) ja poraustyökalun ympäröivän ulkopinnan (7) välissä ulottuva ainakin yksi signaalin läpäisevä elin (6).10 borehole information and wherein the borehole mapping tool (4) has a transmitter (5) for transmitting signals containing the borehole drillhole information, characterized in that the borehole mapping tool (4) has a central flush channel (3) and a borehole (7) extending at least one signal transmitting member (6). 2. Patenttivaatimuksen 1 mukainen poraustyökalu, tunnettu siitä, että mainittu ainakin yksi signaalin läpäisevä elin (6) on konfiguroitu estämään porausreiän kartoitustyökalu (4) pyörimästä keskeiseen huuhtelukanavaan (3) nähden olemalla kosketuksessa porausreiän kartoitustyökaluun (4) keskeisen huuhtelukanavan (3) sisällä.A drilling tool according to claim 1, characterized in that said at least one signal-transmitting means (6) is configured to prevent the drilling hole mapping tool (4) from rotating with respect to the central rinsing channel (3) by contacting the drilling hole mapping tool (4). 3. Patenttivaatimuksen 1 tai 2 mukainen poraustyökalu, tunnettu siitä, että pitkänomainen ulkoinen elin (26), kuten tappi, pultti tai ruuvi, on konfiguroitu estämään porausreiän kartoitustyökalu (4) pyörimästä keskeiseen huuhtelukanavaan (3) nähden olemalla kosketuksessa porausreiän kartoitustyökaluun (4) keskeisen huuhtelukanavan (3)Drilling tool according to Claim 1 or 2, characterized in that the elongate external member (26), such as a pin, bolt or screw, is configured to prevent the drilling hole mapping tool (4) from rotating with respect to the central flushing channel (3). flushing canal (3) 25 sisällä.25 inside. 4. Jonkin patenttivaatimuksista 1-3 mukainen poraustyökalu, tunnettu siitä, että poraustyökalu käsittää aukon (10), joka ulottuu poraustyökalun ympäröivän ulkopinnan (7) ja osan keskeistä huuhtelukanavaa (3) rajoittavan ympäröivän sisäpinnan välissä,Drilling tool according to one of Claims 1 to 3, characterized in that the drilling tool comprises an opening (10) extending between the surrounding outer surface (7) of the drilling tool and the inner inner surface delimiting the central flushing channel (3) of the part, 30 ja siitä että signaalin läpäisevä elin (6) on aikaansaatu aukkoon (10) siten, että signaalin läpäisevä elin (6) muodostaa poraustyökalun ympäröivästä ulkopinnasta (7) osan.And wherein the signal-transmitting member (6) is provided in the aperture (10) so that the signal-transmitting member (6) forms part of the surrounding outer surface (7) of the drilling tool. 20155092 prh 03 -05- 201820155092 prh 03 -05- 2018 5. Patenttivaatimuksen 4 mukainen poraustyökalu, tunnettu siitä, että aukkoon (10) on aikaansaatu signaalin läpäisevä elin (6) siten että poraustyökalun ympäröivässä ulkopinnassa (7) signaalin läpäisevän elimen (6) kohdalla on signaalin läpäisevän elimen (6) kohdalla oleva syvennys (23).Drilling tool according to Claim 4, characterized in that a signal-transmitting element (6) is provided in the aperture (10) so that a recess (23) is provided on the outer surface (7) of the drilling tool at the signal-transmitting element (6). ). 6. Patenttivaatimuksen 4 tai 5 mukainen poraustyökalu, tunnettu siitä, että aukko on varustettu urilla (24), joihin signaalin läpäisevä elin (6) ulottuu.Drilling tool according to Claim 4 or 5, characterized in that the opening is provided with grooves (24) extending into the signal-transmitting means (6). 7. Jonkin patenttivaatimuksista 1-6 mukainen poraustyökalu, tunnettu siitä, että signaalin 10 läpäisevä elin (6) on tehty polymeeristä ja/tai huokoisesta metallista.Drilling tool according to one of Claims 1 to 6, characterized in that the signal-transmitting member (6) is made of a polymer and / or a porous metal. 8. Jonkin patenttivaatimuksista 1-7 mukainen poraustyökalu, tunnettu siitä, että porausreiän kartoitustyökalu (4) on ripustettu keskeiseen huuhtelukanavaan (3) ensimmäisen vaimennusvälineen (8) ja toisen vaimennusvälineen (9) väliin siten että ensimmäinenDrilling tool according to one of Claims 1 to 7, characterized in that the drilling hole mapping tool (4) is suspended in a central flush channel (3) between the first damping means (8) and the second damping means (9). 15 vaimennusväline (8) ja toinen vaimennusväline (9) ovat esipuristettuja.The damping means (8) and the second damping means (9) are pre-compressed. 9. Jonkin patenttivaatimuksista 1-8 mukainen poraustyökalu, tunnettu siitä, että siinä on poraussarjakokoonpanon (1) ja poranteräkokoonpanon (2) välissä sovitin (11), jolloin sovitin (11) on konfiguroitu liittämään poranteräkokoonpano (2)Drilling tool according to one of Claims 1 to 8, characterized in that it comprises an adapter (11) between the drill kit assembly (1) and the drill bit assembly (2), wherein the adapter (11) is configured to connect the drill bit assembly (2). 20 poraussarjakokoonpanoon (1), jolloin sovittimessa (11) on poraustyökalun keskeisestä huuhtelukanavasta osan muodostava keskeinen huuhtelukanavaosuus (20), ja jolloin sovittimen (11) ympäröivä ulkopinta (7) muodostaa poraustyökalun ympäröivästä ulkopinnasta (7) osan, siitä, että porausreiän kartoitustyökalu (4) on aikaansaatu sovittimen (11) keskeiseen huuhtelukanavaosuuteen (20), ja20 drilling kit assembly (1), wherein the adapter (11) has a central flush channel portion (20) forming part of the central flushing channel of the drilling tool, and wherein the outer peripheral surface (7) of the adapter (11) forms a portion of the outer peripheral surface (7) ) is provided in the central flush channel portion (20) of the adapter (11), and 25 siitä, että sovittimeen (11) on aikaansaatu ainakin yksi signaalin läpäisevä elin (6) siten, että mainittu ainakin yksi signaalin läpäisevä elin (6) ulottuu sovittimen (11) keskeisen huuhtelukanavaosuuden (20) ja sovittimen (11) ympäröivän ulkopinnan (7) välissä.25, wherein at least one signal-transmitting element (6) is provided in the adapter (11) so that said at least one signal-transmitting element (6) extends over the central flush channel portion (20) of the adapter (11) and the outer outer surface (7) of the adapter (11). between. 10. Jonkin patenttivaatimuksista 1-9 mukainen poraustyökalu, tunnettuDrilling tool according to one of claims 1 to 9, characterized 30 siitä, että porausreiän kartoitustyökalu (4) käsittää elastomeerista tehdyn ulkokuoren (25), ja siitä, että ulkokuori (25) on porausreiän kartoitustyökalun (4) lähettimestä (5) lähtöisin olevat signaalit läpäisevä.30, characterized in that the borehole mapping tool (4) comprises an elastomeric outer shell (25) and that the outer shell (25) is permeable to the signals emitted from the transmitter (5) of the borehole mapping tool (4).
FI20155092A 2015-02-11 2015-02-11 Percussive drill tool FI127492B (en)

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US6148935A (en) * 1998-08-24 2000-11-21 Earth Tool Company, L.L.C. Joint for use in a directional boring apparatus
CA2378693A1 (en) * 1999-07-09 2001-01-18 Honeywell International Inc. Propagating wave earth formation resistivity measuring arrangement
US6644421B1 (en) * 2001-12-26 2003-11-11 Robbins Tools, Inc. Sonde housing
US7413033B2 (en) * 2004-11-19 2008-08-19 Tt Technologies, Inc. Directional drill head
WO2007038940A1 (en) * 2005-09-20 2007-04-12 Telecom Italia S.P.A. A boring head, a method and an apparatus for accomplishing a conveyance line boring operation
US7654341B2 (en) * 2006-10-26 2010-02-02 Tt Technologies, Inc. Drill stem coupling and method for a directional drill
US9290994B2 (en) * 2011-12-29 2016-03-22 Charles T. Webb Sonde housing and bit body arrangement for horizontal directional drilling
FI123928B (en) 2012-09-06 2013-12-31 Robit Rocktools Ltd Procedure for exploring boreholes, bore arrangements, and borehole survey composition

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