CN118030026A - Tool string hole device for flexible cable connection and application method thereof - Google Patents

Tool string hole device for flexible cable connection and application method thereof Download PDF

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Publication number
CN118030026A
CN118030026A CN202410100120.2A CN202410100120A CN118030026A CN 118030026 A CN118030026 A CN 118030026A CN 202410100120 A CN202410100120 A CN 202410100120A CN 118030026 A CN118030026 A CN 118030026A
Authority
CN
China
Prior art keywords
drill rod
tool string
logging
hole
piston
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN202410100120.2A
Other languages
Chinese (zh)
Inventor
项洋
左勇哲
曾立新
丁晔
郭顺亚
尹燕良
王茂智
梁旸杰
张金羽
余彦忠
李龙标
夏永进
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changjiang Geotechnical Engineering Co ltd
Original Assignee
Changjiang Geotechnical Engineering Co 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 Changjiang Geotechnical Engineering Co ltd filed Critical Changjiang Geotechnical Engineering Co ltd
Priority to CN202410100120.2A priority Critical patent/CN118030026A/en
Publication of CN118030026A publication Critical patent/CN118030026A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • 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
    • E21B17/023—Arrangements for connecting cables or wirelines to downhole devices
    • 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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
    • 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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
    • E21B23/10—Tools specially adapted therefor
    • 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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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Geophysics (AREA)
  • Earth Drilling (AREA)

Abstract

The invention discloses a tool string hole device for flexible cable connection, and relates to the field of engineering investigation and geological investigation. The device comprises a logging assembly, a hollow drill rod and a split three-way joint; the split three-way joint comprises a high-pressure water channel, a logging equipment cable channel and a drill rod male screw thread; the hollow drill rod is connected with a drill rod male screw thread; the logging assembly comprises a traction piston, a logging tool string and a pushing piston, wherein the traction piston is connected with the logging tool string, and the logging tool string is connected with a signal transmission cable; in directional drilling with curved drilling track or straight or inclined hole with pressurized water, the invention can overcome the influence of buoyancy, cable, logging tool string, friction force between hole walls and other factors, and can complete in-hole test, shorten the investigation period and raise the investigation efficiency.

Description

Tool string hole device for flexible cable connection and application method thereof
Technical Field
The invention relates to the field of engineering investigation and geological investigation, in particular to a tool string hole device for flexible cable connection. The invention also discloses a using method of the tool string hole device for the flexible cable connection.
Background
In engineering investigation and geological investigation processes, a series of in-hole tests are generally required to be carried out on the drill holes besides drilling the core so as to more comprehensively and accurately find out geological structures, groundwater development conditions and the like; the conventional experimental test object in the hole is a vertical hole or an inclined hole, the drilling axis is approximately straight, and the logging tool is easy to string into the hole; in directional drilling or straight holes or inclined holes with pressurized water, the drilling axis is not straight, but curved, and because the logging tool strings are in flexible cable connection with each other, the friction force between the cable, the tool strings and the hole wall is large, and meanwhile, the logging tool strings are influenced by buoyancy, so that the logging tool strings are extremely difficult to enter the holes.
The purpose of directional drilling layout for geological investigation is generally to more accurately find out stratum lithology and geological structure, karst phenomenon and development degree, rock mass permeability, development fault zone scale, engineering geological characteristics and the like, and the geological condition of a investigation target is difficult to comprehensively and accurately judge only by a rock core taken by the directional drilling; if the necessary in-hole test cannot be completed in directional drilling, geological conditions cannot be effectively and accurately ascertained, and reliability of investigation results is greatly compromised.
Therefore, it is necessary to develop a tool string hole device that solves the problem of difficulty in string a test tool into a hole.
Disclosure of Invention
A first object of the present invention is to overcome the above-mentioned drawbacks of the related art, and to provide a tool string hole device for a flexible cable connection.
A second object of the present invention is to provide a method of using such a cable-connected tool string access hole arrangement.
In order to achieve the first object, the technical scheme of the invention is as follows: a tool string access device for a flexible cable connection, characterized by: the device comprises a logging assembly positioned in a bare hole section in a borehole, a hollow drill rod positioned in the borehole, and a split type three-way joint connected with the rear end of the hollow drill rod;
the split three-way joint comprises a high-pressure water channel, a logging equipment cable channel and a drill rod male screw thread; the rear end of the hollow drill rod is connected with a drill rod male screw thread;
The logging assembly comprises a traction piston, a logging tool string and a pushing piston, wherein the traction piston is connected with the front end of the logging tool string through a powerful traction rope, and the rear end of the logging tool string is connected with a signal transmission cable; the signal transmission line cable sequentially passes through the pushing piston and the hollow drill rod and extends out of the cable channel of the logging equipment.
In the above technical scheme, the pushing piston is divided into two parts along the axis, the pushing piston of the two parts clamps the signal transmission line cable, and the pushing pistons of the two parts are detachably connected.
In the technical scheme, the front end face of the pushing piston is provided with an arc chamfer.
In the above technical solution, the traction piston front section is streamlined.
In the technical scheme, the traction piston is provided with a wire slot along the axis, and the powerful traction rope is connected with the front end of the traction piston through the wire slot.
In the technical scheme, the outer diameter of the traction piston is larger than that of the pushing piston.
In order to achieve the second object, the technical scheme of the invention is as follows: the utility model provides a use method of tool string hole device of flexible cable connection which characterized in that:
Step one: enlarging the bore diameter of the drill hole;
Step two: lowering the hollow drill rod in the borehole;
step three: the split type three-way joint is arranged at the rear end of the hollow drill rod, and the logging assembly sequentially passes through the split type three-way joint and the hollow drill rod to enter a borehole;
step four: installing a rear cover of a cable channel of the logging equipment, and connecting the high-pressure water channel with a high-pressure water pump truck;
step five: opening a pump truck to send high-pressure water into the high-pressure water channel; high-pressure water enters a borehole through a hollow drill rod, pressure difference is formed before and after the logging assembly, the logging assembly is driven to move inwards of the borehole, the logging assembly is flushed to a naked hole section, and the high-pressure water returns to the ground through annular gaps among the naked hole section, the hollow drill rod and the borehole wall; lifting the hollow drill rod to enable the logging tool string to be dispersed in the bare hole section, and carrying out in-hole testing work.
Compared with the prior art, the invention has the following advantages:
1) In directional drilling with curved drilling track or straight or inclined hole with pressurized water, the invention can overcome the influence of buoyancy, cable, logging tool string, friction force between hole walls and other factors, and can complete in-hole test, shorten the investigation period and raise the investigation efficiency.
2) The invention can effectively prevent the logging tool string from accumulating, thereby more comprehensively and accurately judging the geological condition of the investigation target, and greatly improving the reliability of the investigation result.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a top view of the traction piston of the present invention.
Fig. 3 is a schematic cross-sectional view of the traction piston of the present invention.
Fig. 4 is a top view of the push piston of the present invention.
Fig. 5 is a schematic cross-sectional view of a push piston of the present invention.
Fig. 6 is a top view of the split tee of the present invention.
Fig. 7 is a schematic cross-sectional view of a split tee of the present invention.
The device comprises a 1-drilling hole, a 11-bare hole section, a 12-hole bottom, a 2-logging component, a 21-traction piston, a 211-wire groove, a 22-logging tool string, a 23-pushing piston, a 24-powerful traction rope, a 25-signal transmission cable, a 3-hollow drill rod, a 4-split three-way joint, a 41-high-pressure water channel, a 42-logging equipment cable channel and a 43-drill rod male screw.
Detailed Description
The following detailed description of the invention is, therefore, not to be taken in a limiting sense, but is made merely by way of example. While the advantages of the invention will become apparent and readily appreciated by reference to the following description.
As can be seen with reference to the accompanying drawings: a tool string hole device connected by a flexible cable comprises a logging component 2 positioned in a bare hole section 11 in a drilling hole 1, a hollow drill rod 3 positioned in the drilling hole 1, and a split three-way joint 4 connected with the rear end of the hollow drill rod 3;
as shown in fig. 7, the split three-way joint 4 includes a high-pressure water channel 41, a logging equipment cable channel 42 and a drill rod male screw 43; the rear end of the hollow drill rod 3 is connected with a drill rod male screw thread 43;
As shown in fig. 1, the logging assembly 2 comprises a traction piston 21, a logging tool string 22 and a pushing piston 23, wherein the traction piston 21 is connected with the front end of the logging tool string 22 through a powerful traction rope 24, and the rear end of the logging tool string 22 is connected with a signal transmission cable 25; the signal transmission line 25 sequentially passes through the pushing piston 23 and the hollow drill rod 3 and extends out of the logging equipment cable channel 42;
An annular gap is formed between the hollow drill rod 3 and the wall of the borehole 1.
As shown in fig. 5, since the signal transmission cable 25 is not detachable, the push piston 23 is divided into two parts along the axis, that is, the push piston 23 is split along the axis, and the two parts clamp the signal transmission cable 25 relatively; the two-part push piston 23 is secured around the waist by a tie or adhesive tape.
The front end surface of the pushing piston 23 is provided with an arc chamfer to reduce resistance, and the pushing piston 23 is used for pushing the logging tool string 22 from the hollow drill rod 3 to the bare hole section 11; grooves 231 are formed in the pushing piston 23 at intervals.
As shown in fig. 3, the forward section of the pulling piston 21 is streamlined to reduce drag, and the pulling piston 21 is used to pull the string 22 out of the hollow drill string 3 into the open hole section 11.
The traction piston 21 is provided with a wire slot 211 along the axis, and the powerful traction rope 24 is connected with the front end of the traction piston 21 through the wire slot 211.
The outer diameter of the traction piston 21 is larger than that of the pushing piston 23, so that hydraulic force can be guaranteed to act on the traction piston 21 preferentially, the pressure of high-pressure water borne by the traction piston 21 is larger than that borne by the pushing piston 23, the situation that the pushing piston 23 pushes the traction piston 21 to advance can not occur, and the logging tool string 22 is prevented from being accumulated.
The utility model provides a use method of tool string hole device of flexible cable connection which characterized in that:
step one: after finishing the whole coring work of the directional investigation drilling, a drilling tool used in the coring drilling process is lifted; determining the number of stages of the hole diameter of the drill hole 1 to be enlarged according to the bristleth of the drill hole, installing a directional reaming bit at the front end of the directional drilling tool, reaming the hole to the hole bottom 12 by using a guide rail on the directional reaming bit, enlarging the hole diameter of the drill hole 1 to 130mm, and ensuring that a tool connected with a flexible cable can be smoothly put into the hole bottom 12 by using a hole penetrating device;
Step two: the drilling tool used during directional reaming is put forward, the phi 95 hollow drill rod 3 is lowered in the drilling hole 1 again, the inner diameter of the hollow drill rod 3 is 80.5mm, and the traction piston 21, the logging tool string 22 and the pushing piston 23 can smoothly pass through the hollow drill rod 3; the traction piston 21 has an outer diameter of 74mm; in order to ensure that all probes are sent out of the hollow drill rod 3 and enter the bare hole section 11, the outer diameter of the pushing piston 23 is slightly smaller than that of the traction piston 21 and is 72mm; the maximum outer diameter of the geophysical prospecting equipment probes involved in the logging tool string 22 is 52mm, and the minimum outer diameter is 48mm; at least 1.2m distance is ensured between the front end of the hollow drill rod 3 and the hole bottom 12, and the distance is not less than the total length of the traction piston 21, the powerful traction rope 24, the logging tool string 22 and the pushing piston 23;
Step three: the split three-way joint 4 is arranged at the rear end of the hollow drill rod 3 through a drill rod male screw thread 43, and the rear cover of the cable channel 42 of the logging equipment is removed; the traction piston 21, the logging tool string 22 and the pushing piston 23 are assembled in sequence, the traction piston 21 and the logging tool string 22 are connected by using a powerful traction rope 24, and the powerful traction rope 24 is firmly fixed with the forefront end of the traction piston 21 through a wire slot 211; the logging assembly 2 is sequentially sent into a drilling hole 1 through a split type three-way joint 4 and a hollow drill rod 3;
Step four: installing a rear cover of the cable passage 42 of the logging equipment, and connecting the high-pressure water passage 41 with a high-pressure water pump truck;
Step five: the pump truck is opened, high-pressure water is fed into the high-pressure water channel 41, the high-pressure water enters the drill hole 1 through the hollow drill rod 3, and a pressure difference is formed between the front and the rear of the logging assembly 2 to drive the logging assembly 2 to move into the drill hole 1; flushing the logging assembly 2 to the bare hole section 11, pulling the piston 21 to penetrate through the drill rod, pushing the logging tool string 22 into the bare hole section 11 by the pushing piston 23, and returning high-pressure water to the ground through annular gaps among the bare hole section 11, the hollow drill rod 3 and the wall of the borehole 1; the hollow drill rod 3 is lifted up by about 0.5-1m, the signal transmission cable 25 is driven to ascend by virtue of friction force, the logging tool strings 22 are ensured to be scattered, the logging tool strings 22 can work normally, and then the in-hole test work is started.
In actual use, in step 1, the bore of borehole 1 is enlarged by 1-3 stages before logging tool string 22 is run into the well; in step 2, the outside diameter of the hollow drill rod 3 is 2-3 stages smaller than the bore diameter of the borehole 1.
Other non-illustrated parts are known in the art.

Claims (7)

1. A tool string access device for a flexible cable connection, characterized by: the device comprises a logging assembly (2) positioned in a bare hole section (11) in a drilling hole (1), a hollow drill rod (3) positioned in the drilling hole (1), and a split three-way joint (4) connected with the rear end of the hollow drill rod (3);
the split three-way joint (4) comprises a high-pressure water channel (41), a logging equipment cable channel (42) and a drill rod male screw thread (43); the rear end of the hollow drill rod (3) is connected with a drill rod male screw thread (43);
The logging assembly (2) comprises a traction piston (21), a logging tool string (22) and a pushing piston (23), wherein the traction piston (21) is connected with the front end of the logging tool string (22) through a powerful traction rope (24), and the rear end of the logging tool string (22) is connected with a signal transmission cable (25); the signal transmission cable (25) sequentially passes through the pushing piston (23) and the hollow drill rod (3) and extends out of the cable channel (42) of the logging equipment.
2. A cable connected tool string access device according to claim 1, wherein: the pushing piston (23) is divided into two parts along the axis, the signal transmission cable (25) is clamped by the pushing piston (23) of the two parts, and the pushing pistons (23) of the two parts are detachably connected.
3. A cable connected tool string access device according to claim 1, wherein: the front end face of the pushing piston (23) is provided with an arc chamfer.
4. A cable connected tool string access device according to claim 1, wherein: the front section of the traction piston (21) is streamline.
5. A cable connected tool string access device according to claim 1, wherein: the traction piston (21) is provided with a wire slot (211) along the axis, and the powerful traction rope (24) is connected with the front end of the traction piston (21) through the wire slot (211).
6. A cable connected tool string access device according to claim 1, wherein: the outer diameter of the traction piston (21) is larger than the outer diameter of the pushing piston (23).
7. A method of using a cable connected tool string access device according to any one of claims 1-6, wherein:
step one: enlarging the aperture of the drilling hole (1);
Step two: a hollow drill rod (3) is lowered in the drill hole (1);
Step three: the split type three-way joint (4) is arranged at the rear end of the hollow drill rod (3), and the logging assembly (2) sequentially passes through the split type three-way joint (4) and the hollow drill rod (3) to enter the drill hole (1);
Step four: installing a rear cover of a cable channel (42) of the logging equipment, and connecting the high-pressure water channel (41) with a high-pressure water pump truck;
step five: opening a pump truck to send high-pressure water into a high-pressure water channel (41); high-pressure water enters the drilling hole (1) through the hollow drill rod (3), pressure difference is formed between the front part and the rear part of the logging assembly (2), the logging assembly (2) is driven to move into the drilling hole (1), the logging assembly (2) is flushed to the naked hole section (11), and the high-pressure water returns to the ground through annular gaps among the naked hole section (11), the hollow drill rod (3) and the wall of the drilling hole (1); lifting the hollow drill rod (3) to enable the logging tool strings (22) to be dispersed in the bare hole section (11) for in-hole testing.
CN202410100120.2A 2024-01-24 2024-01-24 Tool string hole device for flexible cable connection and application method thereof Pending CN118030026A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202410100120.2A CN118030026A (en) 2024-01-24 2024-01-24 Tool string hole device for flexible cable connection and application method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202410100120.2A CN118030026A (en) 2024-01-24 2024-01-24 Tool string hole device for flexible cable connection and application method thereof

Publications (1)

Publication Number Publication Date
CN118030026A true CN118030026A (en) 2024-05-14

Family

ID=90990291

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202410100120.2A Pending CN118030026A (en) 2024-01-24 2024-01-24 Tool string hole device for flexible cable connection and application method thereof

Country Status (1)

Country Link
CN (1) CN118030026A (en)

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