JP5384240B2 - Hole lifting device - Google Patents

Description

  The present invention relates to a hole opening / closing device. More specifically, the present invention relates to a hole lifting device suitable for use in lifting and lowering a casing pipe and a rod for inserting, for example, a hydraulic test device or a water sampling device fixed to the lower end into a test weight hole. About.

  In a hydraulic test conducted using a borehole with spring water even in a borehole drilled from a tunnel, tunnel or ground, the groundwater spring generated when the test equipment is installed causes a decrease in pore water pressure. There is a risk of prolonging. In addition, from the viewpoint of protecting the groundwater considering the conservation of the natural environment, it is desirable to prevent undesired outflow of spring water, and if there is a risk of contamination with substances that adversely affect health or the natural environment. In particular, the treatment of groundwater that springs up during the test becomes a problem.

  There is a blowout prevention device as a conventional device that is installed at the opening of a borehole and prevents outflow of fluid out of the hole when gas or oil in the ground is ejected from the hole during excavation work (patented) Reference 1). As shown in FIG. 6, the blowout prevention device 100 is attached to a lower end of a drilling riser pipe 103 that is lifted and lowered by a lifting device 102 of a seabed excavation ship 101 and is provided at a hole of a seabed 104. This prevents gas and oil in the ground from being ejected toward the riser pipe 103 while excavating the sea floor 104 through the riser pipe 103 with the connector 107 fitted to the well head 108. For this reason, the blowout prevention device 100 has a structure in which when gas or oil is ejected, a pipe in the device is cut and the hole is closed with a valve body or the like so that a part of the components of the device is left in the hole. Specifically, the frame 106 of the blowout prevention device 100 has a joint 111 connected to the riser pipe 103, an upper annular 112 that closes the hole with rubber, and a lower annular that is left on the well head 108 side at the time of cutting. 113, when the valve body is actuated to close the hole or cut the pipe, the ram part 114 and the connector 107 are provided. When the connector 107 and the well head 108 are connected, gas or oil is ejected from the hole port. The pipe is cut by the ram part 114, and the joint 111, the upper annular 112 and the lower annular 113 side are separated and the lower annular is cut. 113 outflow of the fluid in the pores of the sea by shut up the hole is blocked by the.

JP 2004-11340 A

  However, in the blowout prevention device 100 of Patent Document 1, when a gas or oil jet from the hole occurs, the riser pipe 103 is cut and the hole is closed by the lower annular 113 to discharge the fluid in the hole. While the riser tube 103 can be raised and lowered, it is still impossible to block gas and oil jets. Therefore, for example, the groundwater spring from the borehole cannot be blocked while raising or lowering the casing pipe or rod fixed to the lower end of the hydraulic test device or the water sampling device.

  Therefore, the present invention is directed to the outside of the hole of groundwater that springs up from the borehole while raising and lowering the casing pipe and rod for inserting, for example, a hydraulic test device or a water sampling device fixed to the lower end into the borehole. It is an object of the present invention to provide a hole lifting device that can prevent outflow.

In order to achieve this object, the hole lifting device according to claim 1 is a hole lifting device that lifts and lowers a device support member installed in the borehole of the borehole and attached to the lower end of the borehole in the borehole. A cylindrical slide member and a slider guide member that surround the device support member and are slidably combined in the axial direction while the peripheral walls have water tightness are provided. The device support member and the slide member gap between the device support member and slider guide members together with the slide member has a sealing portion having a sealing member control is possible of the conditions not exhibiting the condition to exhibit watertightness against the gap between the a seal comprising a sealing member control is possible of the conditions not exhibiting the condition to exhibit watertightness possessed slider guide members relative to, while elevating the device support member Sly At least one of the seal member of the seal member and the slider guide member member so that both the sealing member exerts a watertight is controlled so as not to a state not exhibiting water-tightness at the same time.

  Therefore, according to this hole lifting device, since both the slide member sealing member and the slider guide member sealing member do not exhibit watertightness at the same time while raising and lowering the device support member, While the apparatus support member is moved up and down in the borehole, the gap around the apparatus support member is sealed to ensure water tightness of the gap.

  According to a second aspect of the present invention, in the hole opening / lowering device according to the first aspect, the apparatus support member is a casing pipe and includes a rod penetrating the casing pipe in the axial direction. The gap between them is used as a pipe for expanding a packer included in the test apparatus in order to set a water sampling section in the sample weight hole. In this case, it is possible to operate the packer inserted into the borehole without separately providing a tube or a communication cable that disturbs the watertightness of the surrounding gap when arranged around the device support member. .

  According to a third aspect of the present invention, in the hole lifting device according to the first aspect, the apparatus support member is a casing pipe and includes a rod penetrating the casing pipe in the axial direction. It is used as a trigger for operating. In this case, it is possible to operate the test apparatus inserted into the borehole without separately providing a tube or a communication cable that disturbs the water tightness of the surrounding gap when arranged around the apparatus support member. it can.

  According to the hole lifting / lowering device of the present invention, it is possible to seal the gap around the device support member and ensure the water tightness of the gap while raising and lowering the device support member in the borehole. It prevents the outflow of groundwater from the hole to the outside of the hole, making it possible to maintain a good test site and preserve the natural environment.

It is a longitudinal cross-sectional view explaining the schematic structure of the hole opening / lowering apparatus of embodiment. It is a longitudinal cross-sectional view explaining the schematic structure of the water sampling apparatus of the hole raising / lowering apparatus of embodiment. It is a longitudinal cross-sectional view explaining the operation | movement of raising / lowering of the casing pipe by a hole opening / lowering apparatus. It is a longitudinal cross-sectional view explaining the operation | movement of raising / lowering of the casing pipe by a hole opening / lowering apparatus. It is a longitudinal cross-sectional view explaining the operation | movement of extraction | collection of the groundwater in the borehole by a water sampling apparatus. It is a side view which shows the whole structure of the conventional blown out prevention apparatus.

  Hereinafter, the configuration of the present invention will be described in detail based on an example of an embodiment shown in the drawings.

  1 to 5 show an example of an embodiment of the hole lifting device of the present invention. In addition, in this embodiment, the hole base 22 is installed in the hole part of the borehole 21 drilled in the ground 20, and the hole raising / lowering device 1 is attached to the hole base 22 and used. An example will be described. In the following description, the vertical direction (that is, the vertical direction) and the horizontal direction of the hole opening / lowering device 1 are defined with reference to the state attached to the hole base 22. The axial direction of the hole lifting device 1 and the component parts of the device and the borehole 21 and the hole base 22 is the vertical direction (ie, the vertical direction).

  The hole base 22 is a cylindrical shape having a concrete concave frame 22a formed as a recess with respect to the ground surface of the ground 20 around the hole of the borehole 21 and an axial through hole (this embodiment). The outer casing pipe 22b and the inner casing pipe 22c formed in a concentric axis with the borehole 21 and a gate valve 22d attached to the upper end of the inner casing pipe 22c. The hole base portion 22 is installed in such a manner that the outer casing pipe 22b and the inner casing pipe 22c pass through the recessed frame 22a and are inserted into the borehole 21 and fixed, and the gate valve 22d is closed from the borehole 21. Prevents groundwater that springs out of the hole. Further, a mounting flange 22e is formed at the upper end of the gate valve 22d so as to project in the outer peripheral horizontal direction.

And the hole raising / lowering apparatus 1 of this embodiment installs the casing pipe 6 as an apparatus support member installed in the hole of the borehole 21 and the water sampling apparatus 10 as a test apparatus in the lower end in the borehole 21. A cylindrical slide pipe 3 that surrounds the casing pipe 6 as a device support member and is combined so that the peripheral walls are watertight and slidable in the axial direction. And an upper seal portion 2 provided with a seal member 2a having a slider guide pipe 5 and capable of controlling whether or not to exhibit water tightness with respect to the gap between the casing pipe 6 and the slide pipe 3. Sea it is possible to control the state not exhibiting the condition to exhibit watertightness against the gap between the casing pipe 6 and slider guide pipe 5 and has a While the lower seal portion 4 having the member 4a is provided and the casing pipe 6 is moved up and down, the seal member 2a of the upper seal portion 2 on the slide pipe 3 side and the seal member 4a of the lower seal portion 4 on the slider guide pipe 5 side At least one of the sealing members 2a, 4a is controlled so as not to exhibit a water tightness and not to be in a state where the water tightness is not exhibited at the same time.

  The upper seal portion 2, the slide pipe 3, the lower seal portion 4, and the slider guide pipe 5 constituting the hole opening / lowering device 1 all have through-holes in the axial direction. Then, in a state where the upper seal portion 2, the slide pipe 3, the lower seal portion 4, and the slider guide pipe 5 are combined as the hole lifting / lowering device 1, all of these through holes communicate with each other and the shaft as the hole lifting / lowering device 1 is provided. A through-hole in the center direction is formed. The through hole in the axial direction as the hole opening / closing device 1 communicates with the borehole 21 through the through hole in the axial direction of the hole base 22.

  Moreover, in this embodiment, the case where the hole raising / lowering apparatus 1 raises / lowers the casing pipe 6 with which the water sampling apparatus 10 was attached to the lower end is mentioned as an example, and is demonstrated. Moreover, in this embodiment, in order to perform the water sampling operation by the water sampling apparatus 10, the rod 7 connected to the water sampling apparatus 10 is provided through the through hole in the axial direction of the casing pipe 6. The required number of casing pipes 6 and rods 7 are connected to each other in accordance with the planned depth of the water sampling apparatus 10 (that is, the depth of the water sampling section). In addition, the casing pipe 6 and the rod 7 have a cylindrical shape (cylindrical shape in the present embodiment) having a through-hole in the axial direction, and there is a gap between the outer peripheral surface of the rod 7 and the inner peripheral surface of the casing pipe 6. Is provided.

  As the upper seal part 2 and the lower seal part 4, an ejection prevention device (also called BOP (abbreviation of Blowout Presenter)) or an ejection prevention device having annular seal members 2 a and 4 a that can be controlled to expand and contract. Those having the same function are used.

  A control device (not shown) is connected to each of the upper seal portion 2 and the lower seal portion 4, and the control device controls expansion / contraction of the seal member 2a and the seal member 4a independently of each other. Specifically, the sealing members 2a and 4a are expanded in a state where the casing pipe 6 (and the rod 7) is passed through, thereby ensuring water tightness between the sealing portions 2 and 4 and the casing pipe 6. Control of preventing leakage of water and allowing the casing pipe 6 to freely pass through the seal portions 2 and 4 by contracting are performed independently of each other.

  A cylindrical (cylindrical in this embodiment) slide pipe 3 having an axial through hole is attached to the lower end surface of the upper seal portion 2. The upper seal portion 2 and the slide pipe 3 are coupled in a state in which, for example, an O-ring is provided between the two, thereby ensuring water tightness at the joint portion and preventing water leakage.

  The lower seal portion 4 is fixed to the upper end of the hole base 22 by joining the lower end surface and the upper end surface of the mounting flange 22e of the hole base 22. The hole base portion 22 and the lower seal portion 4 are coupled in a state in which, for example, an O-ring is provided between the both, thereby ensuring water tightness at the joint portion and preventing water leakage.

  Further, a cylindrical (in this embodiment, cylindrical) slider guide pipe 5 having an axial through hole is attached to the upper end surface of the lower seal portion 4. The lower seal portion 4 and the slider guide pipe 5 are coupled in a state in which, for example, an O-ring is provided between the both, thereby ensuring water tightness at the joint portion and preventing water leakage.

  The slider guide pipe 5 is slidably inserted into the through hole in the axial direction of the slide pipe 3. The slider guide pipe 5 and the slide pipe 3 slide by, for example, attaching an O-ring or Amazon packing to a position near the lower end of the inner peripheral surface of the slide pipe 3 and engaging between the outer peripheral surface of the slider guide pipe 5. It is combined in a state where water tightness in the surface is secured and water leakage is prevented. In the present embodiment, the Amazon packing is attached to the slide pipe 3 by fitting a tightening ring from the lower end side with the Amazon packing provided at the lower end of the peripheral wall of the slide pipe 3.

  As described above, the lower seal portion 4 and the slider guide pipe 5 are fixed to the hole base 22, and the upper seal portion 2 and the slide pipe 3 are combined so as to be movable up and down.

  And the water sampling apparatus 10 attached to the casing pipe 6 and its lower end in the aspect which penetrates these upper seal part 2 and the slide pipe 3, the lower seal part 4, the slider guide pipe 5, and the hole base 22 up and down. It is inserted into the borehole 21. Note that when the casing pipe 6 and the water sampling apparatus 10 are inserted into the borehole 21, the gate valve 22d of the hole base 22 is opened. Further, the rod 7 is installed by inserting the casing pipe 6 and the water sampling apparatus 10 at a predetermined depth and then inserting the rod 7 into the casing pipe 6.

  Next, as shown in FIG. 2, the water sampling apparatus 10 in the present embodiment is disposed inside the push rod cylinder 13 attached to the push rod cylinder 13 attached to the lower end of the casing pipe 6 and the lower end of the rod 7. Rod end pipe 11 and push rod 12 attached to the lower end thereof, main valve 14 and spring 15 attached to the lower part inside push rod cylinder 13, and fluid passage hole attached to the lower end of push rod cylinder 13 Provided between the guide pipe 17 communicating with 13c, the upper packer 16A attached to the peripheral surface of the guide pipe 17, the lower packer 16B disposed below the upper packer 16A, and both packers 16A and 16B And a strainer 19 joined to the lower end of the guide pipe 17.

  The lower end portion of the casing pipe 6 and the upper end portion of the push rod cylinder 13, the lower end portion of the rod 7 and the upper end portion of the rod end pipe 11 are each provided with, for example, an O-ring to ensure water tightness at the joint portion. And combined with water leakage prevented.

  The rod tip pipe 11 is formed in a short cylindrical shape (cylindrical shape in the present embodiment) having a through hole in the axial direction, and an upper end portion is attached to a lower end portion of the rod 7.

  The push rod 12 is formed in a cylindrical shape (cylindrical shape in the present embodiment) having a through hole in the axial direction, although the diameter varies depending on the axial direction section. The push rod 12 includes an intermediate portion 12c having a small diameter in the axial direction intermediate portion, an upper portion rod receiving portion 12a having a larger diameter than the intermediate portion 12c, and a lower portion rod head portion 12b. A lower end opening 12d is formed on the lower end surface of the rod head portion 12b.

  The lower end portion of the rod tip pipe 11 can be fitted to the rod receiving portion 12a that is the upper portion of the push rod 12 (in other words, the outer peripheral surface of the rod tip pipe 11 and the inner peripheral surface of the rod receiving portion 12a are slidable). And both are detachable). The rod tip pipe 11 and the rod receiving portion 12a are fitted in a state in which water tightness is secured in a portion fitted by, for example, an O-ring being provided and water leakage is prevented.

  The push rod cylinder 13 is formed in a cylindrical shape (cylindrical shape in the present embodiment) having a through hole in the axial direction, although the diameter varies depending on the axial direction section, and the rod of the rod end pipe 11 and the push rod 12. The upper cylinder hollow part 13a which accommodates the receiving part 12a, and the lower cylinder hollow part 13b which accommodates the rod head part 12b of the push rod 12 are contained inside. Further, a tubular fluid passage hole 13c extending downward is formed at the lower end of the push rod cylinder 13.

  Of the inner peripheral surface of the push rod cylinder 13, a belt-like portion 13d corresponding to the boundary portion between the upper cylinder hollow portion 13a and the lower cylinder hollow portion 13b is connected to the outer peripheral surface of the intermediate portion 12c of the push rod 12 and, for example, an O-ring. By being provided, it is slidably in contact with water in a state where water tightness is ensured and water leakage is prevented. As a result, the push rod 12 can slide in the axial direction with respect to the push rod cylinder 13, but fluid does not flow in and out between the upper cylinder hollow portion 13a and the lower cylinder hollow portion 13b.

  A gap is provided between the peripheral surface of the upper cylinder hollow portion 13a and the outer peripheral surfaces of the rod end pipe 11 and the rod receiving portion 12a of the push rod 12. The gap communicates with the gap between the rod 7 and the casing pipe 6.

  The main valve 14 is formed in a conical shape having a large upper diameter and a small lower diameter, and is disposed in the axial direction, and is attached to a fluid passage hole 13 c formed at the lower end of the push rod cylinder 13.

  When the rod head portion 12b of the push rod 12 is positioned at the uppermost portion of the lower cylinder hollow portion 13b, the portion near the upper end of the main valve 14 is fitted into the lower end opening 12d of the push rod 12. At this time, for example, an O-ring is provided at the joint between the two to ensure water tightness, and when the portion near the upper end of the main valve 14 is fitted in the lower end opening 12d, the fluid flows in and out of the lower end opening 12d. There is no.

  Further, the main valve 14 has a lower end surface opening toward the fluid passage hole 13c of the push rod cylinder 13 and a side opening toward the lower cylinder hollow portion 13b, and the fluid passage hole 13c and the lower cylinder hollow portion. A fluid flow path 14a communicating with 13b is formed.

  The spring 15 is arranged in such a manner that the main valve 14 passes through the axial center position (in other words, arranged around the main valve 14), and is interposed between the push rod 12 and the push rod cylinder 13. The elastic force which pushes up the push rod 12 with respect to 13 is exhibited.

  A cylindrical (in this embodiment, cylindrical) guide pipe 17 having an axial through hole is attached to the lower end of the push rod cylinder 13, and an axial through hole is provided at the lower end of the guide pipe 17. A cylindrical (cylindrical in this embodiment) strainer 19 is attached. Moreover, the head of the water sampling apparatus 10 is attached to the lower end of the strainer 19, and the lower packer 16B is attached around the head.

  With the above configuration, the lower cylinder hollow portion 13b, the fluid flow path 14a, the fluid passage hole 13c, the through-hole of the guide pipe 17 and the through-hole of the strainer 19 are communicated with each other and are taken in through the strainer 19. The fluid in the borehole 21 is guided to the lower cylinder hollow portion 13b.

  Further, in the water sampling apparatus 10 of the present embodiment, the first packer pipe 18A is provided between the upper cylinder hollow portion 13a of the push rod cylinder 13 and the upper packer 16A, and the upper packer 16A and the lower packer 16B. The second packer pipe 18B is provided between the two.

  Further, in a state where the water sampling apparatus 10 is installed at a predetermined depth, the casing pipe 6 provided with the port is added as the uppermost casing pipe 6, and the upper end of the casing pipe 6 and the rod 7 is secured to be watertight. It is blocked by the state.

  Thus, for example, a compressor installed on the ground is operated, and the gap between the outer peripheral surface of the rod 7 and the inner peripheral surface of the casing pipe 6 through the port of the casing pipe 6 to the rod receiver of the rod end pipe 11 and the push rod 12. The fluid can be fed into the upper packer 16A through the gap between the outer peripheral surface of the portion 12a and the peripheral surface of the upper cylinder hollow portion 13a of the push rod cylinder 13 through the first packer pipe 18A. The fluid can also be fed into the lower packer 16B via the second packer pipe 18B. In other words, the upper packer 16A and the lower packer 16B are expanded by an operation from the ground, and a water sampling section closed by both packers 16A and 16B is set at an arbitrary depth in the borehole 21.

  The operation of raising / lowering the casing pipe 6 by the hole raising / lowering device 1 having the above-described configuration will be described below with reference to FIGS. 3 and 4. 3 and 4, the hole lifting device 1 and the casing pipe 6 are supported by a gantry, a crane, and the like (not shown) in an appropriate manner so as not to obstruct each operation.

  Further, in the following description, the seal portion 2a, 4a of the seal portion 2, 4 is expanded to ensure watertightness between the casing pipe 6 and water leakage is prevented. The state in which the seal members 2a and 4a contract and the casing pipe 6 can freely pass through the section of the seal portions 2 and 4 is referred to as the seal portion being in the OFF state.

  First, the operation of the hole lifting device 1 when the casing pipe 6 is lowered into the borehole 21 will be described.

  The explanation here is that the gate valve 22d is opened and the water sampling device 10 is inserted into the hole base 22, and the upper seal portion 2 and the lower seal portion 4 are both in the ON state, and the water sampling device 10 is The process starts from a state where the casing pipe 6 attached to the lower end is held (FIG. 3A). In this state, since the lower seal portion 4 is in the ON state and the water tightness is ensured, the groundwater that springs from the borehole 21 does not flow out to the ground.

  As the descent operation, another casing pipe 6 is added to the upper end portion of the casing pipe 6 ((B)). Note that the casing pipes 6 are joined together in a state in which, for example, an O-ring is provided between the two, thereby ensuring water tightness at the joint portion and preventing water leakage.

  Next, the upper seal portion 2 is turned off and lifted (same (C)), and is turned on at the lifted position (same (D)). When the upper seal portion 2 is pulled up, the slide pipe 3 attached to the lower end of the upper seal portion 2 is also lifted together. At this time, the water tightness on the sliding surface between the slide pipe 3 and the slider guide pipe 5 is raised. The slide pipe 3 slides with respect to the slider guide pipe 5 in a state in which is secured.

  Next, the lower seal portion 4 is turned off (FIG. 4A). At this time, the groundwater that has been stopped by the sealing member 4a of the lower seal portion 4 (that is, spring water in the borehole 21) passes through the lower seal portion 4 and reaches the position of the upper seal portion 2 with the casing pipe 6. It enters the gap between the slide pipe 3 and the slider guide pipe 5. However, in this state, since the upper seal portion 2 is in the ON state and the water tightness is ensured, the groundwater that springs from the borehole 21 does not flow out to the ground.

  Next, the upper seal portion 2 is pushed down ((B)). When the upper seal portion 2 is pushed down, the slide pipe 3 is also pushed down. At this time, the slide pipe 3 slides against the slider guide pipe 5 in a state where water tightness is secured on the sliding surfaces of both. Move. At this time, since the upper seal portion 2 is in the ON state, the casing pipe 6 held by the upper seal portion 2 is also pushed down, and water tightness is ensured between the upper seal portion 2 and the casing pipe 6. Therefore, the groundwater that has entered between the casing pipe 6 and the slide pipe 3 / slider guide pipe 5 up to the position of the upper seal portion 2 is pushed back into the borehole 21 without leaking.

Next, the lower seal portion 4 is turned on ((C)). This state is the same as the state shown in FIG. 3 (A). Thereafter, the casing pipe 6 is added until the water sampling device 10 attached to the lowermost casing pipe 6 reaches a predetermined depth, as shown in FIGS. Repeat the procedure.

  Further, when the casing pipe 6 is lifted from the borehole 21 (in other words, pulled up), the state (B) → (A) → FIG. 3 (D) → (C) → ( B) → (A) (this returns to the state of FIG. 4C) is repeated.

  Here, when the casing pipe 6 is pulled up, groundwater has entered between the casing pipe 6 and the slide pipe 3 / slider guide pipe 5 up to the position of the upper seal portion 2 in the state of FIG. If the operation proceeds to the operation shown in FIGS. 3C to 3B with the groundwater entering, the groundwater will flow out. Therefore, a port is provided at a position near the upper end of the upper seal portion 2 or the slide pipe 3, and air is injected through the port by operating, for example, a compressor installed on the ground in the state of FIG. Thus, it is desirable to push the ground water between the casing pipe 6 and the slide pipe 3 / slider guide pipe 5 back into the borehole 21 and then proceed to the subsequent operation.

  Subsequently, the operation of collecting groundwater in the borehole 21 by the water sampling apparatus 10 having the above-described configuration will be described below with reference to FIG.

  After lowering the water sampling apparatus 10 attached to the lower end of the casing pipe 6 to a predetermined depth in the borehole 21, the casing pipe 6 while adding another rod 7 to the upper end of the rod 7 having the tip pipe 11 attached to the lower end. As shown in FIG. 5 (A), the tip pipe 11 is advanced to a position above the rod receiving portion 12a of the push rod 12. Although not shown in FIG. 5A, when moving in the borehole 21, the packers 16A and 16B are contracted without applying pressure.

  At this time, the rod head portion 12b of the push rod 12 is pushed up to the uppermost portion of the lower cylinder hollow portion 13b by the elastic force of the spring 15, and a portion closer to the upper end of the main valve 14 and a lower end opening portion 12d of the push rod 12. Are fitted together. In this state, the groundwater in the borehole 21 taken from the strainer 19 can enter the lower cylinder hollow portion 13b, but the lower end opening 12d is blocked by the portion near the upper end of the main valve 14. Therefore, it cannot enter the push rod 12.

  Then, the rod 7 is further pushed down from the ground, and the lower end portion of the rod tip pipe 11 is fitted into the rod receiving portion 12a of the push rod 12 as shown in FIG. In this state, for example, a compressor installed on the ground is operated to apply pressure to the gap between the casing pipe 6 and the rod 7 and also through the first packer pipe 18A and the second packer pipe 18B. Pressure is applied to expand the upper packer 16A and the lower packer 16B. Thereby, the water sampling area closed by both packers 16A and 16B is set to the planned depth in the borehole 21.

  When expanding both packers 16A and 16B, before applying pressure, a space to apply pressure to expand both packers 16A and 16B (specifically, for example, the inside of both packers 16A and 16B and the rod 7). Or a gap between the outer peripheral surface of the casing pipe 6 and the inner peripheral surface of the casing pipe 6 may be filled with water. By filling the gap between the rod 7 and the casing pipe 6 with water before applying pressure, it is possible to subtract the head of the packer expansion pressure, so that the required pressure is reduced. Can do.

  Next, when the rod 7 is further pushed down from the ground, the push rod 12 is pushed down, and the lower end opening 12d is shifted downward from the portion near the upper end of the main valve 14 ((C)). Since the main valve 14 has a conical shape with a smaller diameter on the lower side, the main valve 14 cannot block the lower end opening 12d, and a gap formed between the lower end opening 12d and the main valve 14 The groundwater in the borehole 21 passes through the push rod 12.

  The groundwater that has entered the push rod 12 flows into the through hole of the rod 7 and is collected on the ground via the through holes of the plurality of rods 7 connected to the ground.

  When the rod 7 is pushed up when a necessary amount of groundwater is collected, the rod head portion 12b of the push rod 12 is pushed up to the uppermost portion of the lower cylinder hollow portion 13b by the elastic force of the spring 15 (the same ( B)). At this time, the lower end opening 12d is positioned near the upper end of the main valve 14, and the lower end opening 12d is closed. As a result, the groundwater in the borehole 21 cannot enter the push rod 12.

  As described above, according to the water sampling apparatus 10 of the present embodiment, the rod 7 in the casing pipe 6 has the role of the water guide pipe for water sampling and the trigger for operating the main valve, and the sampling is performed. Since the gap between the casing pipe 6 and the rod 7 has a role of a chamber (pipe) for operating the upper and lower packers for setting the water section, it is usually used for the expansion of the packer that is turned outside the casing. In addition, it is possible to avoid the use of a pressure tube or a communication cable for valve control, thereby enabling a structure including upper and lower seal portions 2 and 4 for preventing the outflow of groundwater in the borehole.

  According to the hole lifting / lowering device of the present invention configured as described above, the seal member 2a on the slide pipe 3 side and the seal member 4a on the slider guide pipe 5 side while the casing pipe 6 as the device support member is raised and lowered. Since both of them are not in a state of not exhibiting watertightness at the same time, the gap around the device support member is sealed to ensure watertightness while the device support member is moved up and down in the borehole 21. It is possible to prevent the groundwater in the borehole 21 from flowing out of the hole.

  In addition, although the above-mentioned form is an example of the suitable form of this invention, it is not limited to this, A various deformation | transformation implementation is possible in the range which does not deviate from the summary of this invention. For example, in the present embodiment, the case where the water sampling device 10 is attached to the lower end of the casing pipe 6 and used as a device for lowering the water sampling device 10 to the planned depth in the borehole 21 has been described as an example. The casing pipe 6 is an example of an object to be lifted and lowered by the hole lifting device of the present invention, and the water sampling apparatus 10 is an example of an object attached to the lower end of the object to be lifted and lowered by the hole lifting and lowering device of the present invention. Not too much. That is, the thing which the hole raising / lowering apparatus of this invention raises / lowers is not restricted to the casing pipe 6 of this embodiment, Moreover, the thing attached to the lower end of the target object to raise / lower is in the water sampling apparatus 10 of this embodiment. Not limited.

DESCRIPTION OF SYMBOLS 1 Hole raising / lowering apparatus 2 Upper seal part 3 Slide pipe 4 Lower seal part 5 Slider guide pipe 6 Casing pipe 7 Rod

Claims (3)

A hole raising / lowering device for raising and lowering a device support member installed at the bottom of the borehole and having a test device attached to the lower end thereof in the borehole, and surrounds the periphery of the device support member and the peripheral walls are watertight A cylindrical slide member and a slider guide member that are combined so as to be slidable in the axial direction, and exhibiting water tightness with respect to a gap between the device support member and the slide member exhibits a state which exhibits the water-tightness against the gap between the slider guide member and the device supporting member with a seal portion having said slide member comprising a sealing member control is possible of the conditions not exhibiting a not a seal comprising a sealing member which is capable of controlling the state has said slider guide member, while lifting the device supporting member is a seal portion of the sliding member And at least one of the hole opening lifting device, characterized in that both sealing members to exhibit watertightness is controlled so as not to a state not exhibiting water-tightness at the same time the sealing member of the slider guide member.   The apparatus support member is a casing pipe and includes a rod penetrating the casing pipe in the axial direction, and a gap between the casing pipe and the rod is set in the sample weight hole to set a water sampling section. The hole lifting device according to claim 1, wherein the hole lifting device is used as a pipe for expanding a packer included in the test device.   2. The hole according to claim 1, wherein the apparatus support member is a casing pipe and includes a rod penetrating the casing pipe in an axial direction, and the rod is used as a trigger for operating the test apparatus. Mouth lifting device.

Images