US20130299161A1 - Double packer apparatus - Google Patents

Double packer apparatus Download PDF

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Publication number
US20130299161A1
US20130299161A1 US13/470,672 US201213470672A US2013299161A1 US 20130299161 A1 US20130299161 A1 US 20130299161A1 US 201213470672 A US201213470672 A US 201213470672A US 2013299161 A1 US2013299161 A1 US 2013299161A1
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US
United States
Prior art keywords
guide unit
ground
unit
transparent window
guide
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.)
Abandoned
Application number
US13/470,672
Inventor
Yong Kwon Koh
Sung Hoon JI
Jong Won Choi
Kyeong Sik WON
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.)
Korea Atomic Energy Research Institute KAERI
Original Assignee
Korea Atomic Energy Research Institute KAERI
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 Korea Atomic Energy Research Institute KAERI filed Critical Korea Atomic Energy Research Institute KAERI
Priority to US13/470,672 priority Critical patent/US20130299161A1/en
Assigned to KOREA ATOMIC ENERGY RESEARCH INSTITUTE reassignment KOREA ATOMIC ENERGY RESEARCH INSTITUTE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHOI, JONG WON, JI, SUNG HOON, KOH, YONG KWON, WON, KYEONG SIK
Publication of US20130299161A1 publication Critical patent/US20130299161A1/en
Abandoned 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/124—Units with longitudinally-spaced plugs for isolating the intermediate space
    • 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
    • E21B47/002—Survey of boreholes or wells by visual inspection
    • 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
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells

Definitions

  • the present invention relates to a double packer apparatus, and more particularly, to a double packer apparatus that may contribute to an enhancement of efficiency by photographing a state of a ground directly.
  • a packer apparatus may be provided in a target area within a tubular well.
  • the packer apparatus may perform the hydraulic testing and the hydraulic shearing on the ground by providing water to the target area after sealing the tubular well and measuring a variation of a water pressure within an area being investigated.
  • the target area may be investigated directly.
  • a general packer apparatus may be unable to photograph the target area directly since the target area is sealed by a packer in a closed state.
  • an inaccurate observation may be performed for the target area, thereby causing a decrease in efficiency of the hydraulic testing and the hydraulic shearing.
  • an aspect of the present invention provides a double packer apparatus that may enhance an efficiency of hydraulic testing and hydraulic shearing by investigating a ground directly.
  • a double packer apparatus including a first guide unit provided in a borehole within a ground, a second guide unit provided within the ground to cover an external surface of the first guide unit, a packer unit to support the second guide unit in the borehole, and seal a portion of an area provided within the ground, and a photographing unit to enter the first guide unit, and photograph the ground, wherein a portion of the external surface of the first guide unit includes a transparent window for photographing the ground.
  • the first guide unit and the second guide unit may have hollow guide pipes having different diameters on concentric circles.
  • the second guide unit may include an open portion in which an area facing the transparent window is formed to be open.
  • the double packer apparatus may further include an injection unit to inject water into the second guide unit.
  • a double packer apparatus including a first guide unit provided in a borehole within a ground, and having a transparent window on a portion of an external surface, a second guide unit, provided within the ground to cover an external surface of the first guide unit, in which a portion of an area facing the transparent window is penetrated, a packer unit to support the second guide unit in the borehole, and seal a portion of an area provided within the ground, and a photographing unit to enter the first guide unit, and photograph the ground at a location facing the transparent window.
  • the first guide unit and the second guide unit may have hollow guide pipes having different diameters on concentric circles.
  • the double packer apparatus may further include an injection unit to inject water into the second guide unit.
  • the transparent window may be formed using an acrylic material.
  • a photographing unit may photograph a state within the ground through a transparent window.
  • FIG. 1 is a diagram illustrating a double packer apparatus according to embodiments of the present invention.
  • FIG. 2 is a cross-sectional view of FIG. 1 .
  • FIG. 1 is a diagram illustrating a double packer apparatus according to embodiments of the present invention.
  • a double packer apparatus 1 may include a first guide unit 10 , a second guide unit 20 , a packer unit 30 , and a photographing unit 40 .
  • the double packer apparatus 1 may be provided in a borehole H within a ground G, and perform hydraulic testing or hydraulic shearing of the ground G.
  • the first guide unit 10 may be provided in the borehole H within the ground G.
  • the first guide unit 10 may have a circular cross section, and include a hollow guide pipe.
  • a portion of an external surface of the first guide unit 10 may include a transparent window 11 formed using an acrylic material.
  • the transparent window 11 may be disposed to face a physically changing area, indicated by a line F of FIG. 1 , of the ground G.
  • the second guide unit 20 may be provided within the ground G to cover the external surface of the first guide unit 10 .
  • the second guide unit 20 may have a different diameter from a diameter of the first guide unit 10 on concentric circles, and include a hollow guide pipe. That is, the first guide unit 10 and the second guide unit 20 may be provided on concentric circles, and a diameter of the second guide unit 20 may be formed to be greater than the diameter of the first guide unit 10 to cover the external surface of the first guide unit 10 , and support the first guide unit 10 .
  • the second guide unit 20 may include an open portion 21 in which an area facing the transparent window 11 included in the first guide unit 10 is formed to be penetrated and open. A state of the ground G is exposed by the open portion 21 .
  • the packer unit 30 may support the second guide unit in the borehole, and seal a portion of an area provided within the ground. To seal the portion of the area, the packer unit 30 may have a dual structure including a first packer 31 and a second packer 32 .
  • the transparent window 11 included in the first guide unit 10 and the open portion 21 included in the second guide unit 20 may be provided to face a sealed space between the first packer 31 and the second packer 32 .
  • the photographing unit 40 may enter the first guide unit 10 , and photograph the ground G.
  • the photographing unit 40 may be controlled by being connected to a controller 41 provided in an external portion of the ground G. Referring to FIGS. 1 and 2 , the photographing unit 40 may enter the first guide unit 10 to face the transparent window 11 of the first guide unit 10 . In this instance, since the open portion 21 may be formed in the second guide unit 20 to face the transparent window 11 , the photographing unit 40 may photograph, through the transparent window 11 and the open portion 21 , a state of the ground G outside of the first guide unit 10 and the second guide unit 20 directly. A physical property of the ground G may be investigated directly using information photographed by the photographing unit 40 .
  • the double packer apparatus 1 may include an injection unit 50 to inject water into the second guide unit 20 .
  • the water injected by the injection unit 50 may be guided to the ground G side through the open portion 21 within the second guide unit 20 , thereby performing hydraulic testing and hydraulic shearing for the ground G.
  • FIG. 2 is a cross-sectional view of FIG. 1 .
  • the photographing unit 40 may enter the first guide unit 10 provided within the borehole H in the ground G.
  • the photographing unit 40 may enter the first guide unit 10 provided with the borehole H to arrive at a location facing the transparent window 11 included in the first guide unit 10 .
  • the photographing unit 40 may photograph a state of the ground G directly through the open portion 21 of the second guide unit 20 facing the transparent window 11 .
  • water provided through the injection unit 50 may be provided to the second guide unit 20 , and be injected to the ground G through the open portion 21 .
  • the injected water may not flow into the first guide unit 10 having the transparent window 11 , in a closed state.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (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)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

A double packer apparatus according to embodiments of the present invention may include a first guide unit provided in a borehole within a ground, a second guide unit provided within the ground to cover an external surface of the first guide unit, a packer unit to support the second guide unit in the borehole, and seal a portion of an area provided within the ground, and a photographing unit to enter the first guide unit and photograph the ground, wherein a portion of the external surface of the first guide unit includes a transparent window for photographing the ground. A ground may be investigated directly using a configuration described in the foregoing, thereby contributing to an enhancement of efficiency.

Description

    BACKGROUND
  • 1. Field of the Invention
  • The present invention relates to a double packer apparatus, and more particularly, to a double packer apparatus that may contribute to an enhancement of efficiency by photographing a state of a ground directly.
  • 2. Description of the Related Art
  • To perform hydraulic testing to investigate a hydraulic characteristic within a ground, or hydraulic shearing to enhance permeability of the ground, a packer apparatus may be provided in a target area within a tubular well. In general, the packer apparatus may perform the hydraulic testing and the hydraulic shearing on the ground by providing water to the target area after sealing the tubular well and measuring a variation of a water pressure within an area being investigated.
  • To determine an efficiency of the hydraulic shearing while accurately analyzing the hydraulic characteristic within the ground, the target area may be investigated directly. However, a general packer apparatus may be unable to photograph the target area directly since the target area is sealed by a packer in a closed state. Thus, an inaccurate observation may be performed for the target area, thereby causing a decrease in efficiency of the hydraulic testing and the hydraulic shearing.
    • SUMMARY
  • To resolve issues described in the foregoing, an aspect of the present invention provides a double packer apparatus that may enhance an efficiency of hydraulic testing and hydraulic shearing by investigating a ground directly.
  • According to an aspect of the present invention, there is provided a double packer apparatus including a first guide unit provided in a borehole within a ground, a second guide unit provided within the ground to cover an external surface of the first guide unit, a packer unit to support the second guide unit in the borehole, and seal a portion of an area provided within the ground, and a photographing unit to enter the first guide unit, and photograph the ground, wherein a portion of the external surface of the first guide unit includes a transparent window for photographing the ground.
  • The first guide unit and the second guide unit may have hollow guide pipes having different diameters on concentric circles.
  • The second guide unit may include an open portion in which an area facing the transparent window is formed to be open.
  • The double packer apparatus may further include an injection unit to inject water into the second guide unit.
  • According to another aspect of the present invention, there is provided a double packer apparatus including a first guide unit provided in a borehole within a ground, and having a transparent window on a portion of an external surface, a second guide unit, provided within the ground to cover an external surface of the first guide unit, in which a portion of an area facing the transparent window is penetrated, a packer unit to support the second guide unit in the borehole, and seal a portion of an area provided within the ground, and a photographing unit to enter the first guide unit, and photograph the ground at a location facing the transparent window.
  • The first guide unit and the second guide unit may have hollow guide pipes having different diameters on concentric circles.
  • The double packer apparatus may further include an injection unit to inject water into the second guide unit.
  • The transparent window may be formed using an acrylic material.
  • According to an embodiment of the present invention, it is possible to contribute to an enhancement of efficiency by photographing a ground directly since a photographing unit may photograph a state within the ground through a transparent window.
  • According to another embodiment of the present invention, it is possible to accurately determine whether hydraulic shearing is effective, and whether a physical property such as a porosity of an aquifer changes during hydraulic testing by investigating a ground directly, thereby contributing to an enhancement of reliability.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • These and/or other aspects, features, and advantages of the invention will become apparent and more readily appreciated from the following description of exemplary embodiments, taken in conjunction with the accompanying drawings of which:
  • FIG. 1 is a diagram illustrating a double packer apparatus according to embodiments of the present invention; and
  • FIG. 2 is a cross-sectional view of FIG. 1.
    •  DETAILED DESCRIPTION
  • Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. Exemplary embodiments are described below to explain the present invention by referring to the figures.
  • FIG. 1 is a diagram illustrating a double packer apparatus according to embodiments of the present invention.
  • Referring to FIG. 1, a double packer apparatus 1 according to embodiments of the present invention may include a first guide unit 10, a second guide unit 20, a packer unit 30, and a photographing unit 40. The double packer apparatus 1 may be provided in a borehole H within a ground G, and perform hydraulic testing or hydraulic shearing of the ground G.
  • The first guide unit 10 may be provided in the borehole H within the ground G. Here, the first guide unit 10 may have a circular cross section, and include a hollow guide pipe. Further, a portion of an external surface of the first guide unit 10 may include a transparent window 11 formed using an acrylic material. The transparent window 11 may be disposed to face a physically changing area, indicated by a line F of FIG. 1, of the ground G.
  • The second guide unit 20 may be provided within the ground G to cover the external surface of the first guide unit 10. In this instance, the second guide unit 20 may have a different diameter from a diameter of the first guide unit 10 on concentric circles, and include a hollow guide pipe. That is, the first guide unit 10 and the second guide unit 20 may be provided on concentric circles, and a diameter of the second guide unit 20 may be formed to be greater than the diameter of the first guide unit 10 to cover the external surface of the first guide unit 10, and support the first guide unit 10. Referring to FIGS. 1 and 2, the second guide unit 20 may include an open portion 21 in which an area facing the transparent window 11 included in the first guide unit 10 is formed to be penetrated and open. A state of the ground G is exposed by the open portion 21.
  • The packer unit 30 may support the second guide unit in the borehole, and seal a portion of an area provided within the ground. To seal the portion of the area, the packer unit 30 may have a dual structure including a first packer 31 and a second packer 32. The transparent window 11 included in the first guide unit 10 and the open portion 21 included in the second guide unit 20 may be provided to face a sealed space between the first packer 31 and the second packer 32.
  • The photographing unit 40 may enter the first guide unit 10, and photograph the ground G. The photographing unit 40 may be controlled by being connected to a controller 41 provided in an external portion of the ground G. Referring to FIGS. 1 and 2, the photographing unit 40 may enter the first guide unit 10 to face the transparent window 11 of the first guide unit 10. In this instance, since the open portion 21 may be formed in the second guide unit 20 to face the transparent window 11, the photographing unit 40 may photograph, through the transparent window 11 and the open portion 21, a state of the ground G outside of the first guide unit 10 and the second guide unit 20 directly. A physical property of the ground G may be investigated directly using information photographed by the photographing unit 40.
  • The double packer apparatus 1 according to embodiments of the present invention may include an injection unit 50 to inject water into the second guide unit 20. The water injected by the injection unit 50 may be guided to the ground G side through the open portion 21 within the second guide unit 20, thereby performing hydraulic testing and hydraulic shearing for the ground G.
  • An operation of measuring a state of the ground G performed by the double packer apparatus 1 according to embodiments of the present invention having a configuration described in the foregoing will be described with reference to FIG. 2.
  • FIG. 2 is a cross-sectional view of FIG. 1.
  • Referring to FIG. 2, the photographing unit 40 may enter the first guide unit 10 provided within the borehole H in the ground G. In this instance, the photographing unit 40 may enter the first guide unit 10 provided with the borehole H to arrive at a location facing the transparent window 11 included in the first guide unit 10. The photographing unit 40 may photograph a state of the ground G directly through the open portion 21 of the second guide unit 20 facing the transparent window 11.
  • Independent of the ground G being photographed by the photographing unit 40, water provided through the injection unit 50 may be provided to the second guide unit 20, and be injected to the ground G through the open portion 21. In this instance, the injected water may not flow into the first guide unit 10 having the transparent window 11, in a closed state.
  • Although a few exemplary embodiments of the present invention have been shown and described, the present invention is not limited to the described exemplary embodiments. Instead, it would be appreciated by those skilled in the art that changes may be made to these exemplary embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (8)

1. A double packer apparatus, comprising:
a first guide unit provided in a borehole within a ground;
a second guide unit provided within the ground to cover an external surface of the first guide unit;
a packer unit to support the second guide unit in the borehole, and to seal a portion of an area provided within the ground;
a photographing unit to enter the first guide unit, and photograph the ground,
wherein a portion of the external surface of the first guide unit includes a transparent window for photographing the ground,
the second guide unit includes an open portion that is oriented to face the transparent window of the first guide unit, and
an injection unit constructed to inject water into the open portion of the second guide unit.
2. The double packer apparatus of claim 1, wherein the first guide unit and the second guide unit have hollow guide pipes having different diameters on concentric circles.
3. (canceled)
4. (canceled)
5. A double packer apparatus, comprising:
a first guide unit provided in a borehole within a ground, and having a transparent window on a portion of an external surface;
a second guide unit, provided within the ground to cover an external surface of the first guide unit, in which a portion of an area facing the transparent window is penetrated;
a packer unit to support the second guide unit in the borehole, and seal a portion of an area provided within the ground;
a photographing unit to enter the first guide unit, and photograph the ground at a location facing the transparent window, and
an injection unit constructed to inject water into the open portion of the second guide unit.
6. The double packer apparatus of claim 5, wherein the first guide unit and the second guide unit have hollow guide pipes having different diameters on concentric circles.
7. (canceled)
8. The double packer apparatus of claim 5, wherein the transparent window is formed using an acrylic material.
US13/470,672 2012-05-14 2012-05-14 Double packer apparatus Abandoned US20130299161A1 (en)

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US13/470,672 US20130299161A1 (en) 2012-05-14 2012-05-14 Double packer apparatus

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6697102B1 (en) * 2000-10-31 2004-02-24 Deepsea Power & Light Company Bore hole camera with improved forward and side view illumination

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6697102B1 (en) * 2000-10-31 2004-02-24 Deepsea Power & Light Company Bore hole camera with improved forward and side view illumination

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AS Assignment

Owner name: KOREA ATOMIC ENERGY RESEARCH INSTITUTE, KOREA, REP

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KOH, YONG KWON;JI, SUNG HOON;CHOI, JONG WON;AND OTHERS;REEL/FRAME:028202/0828

Effective date: 20120511

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION