JP4942728B2 - Fluid sampling device - Google Patents

Description

  The present invention relates to a fluid sampling device, and more particularly, it is possible to easily sample a fluid existing at a desired depth and section in a borehole, and to dramatically reduce the time and labor required for sampling. The present invention relates to a fluid sampling device.

  In general, field hydraulic tests and geochemical analyzes are conducted to investigate the hydraulic properties of the medium of interest in the crystalline rock in the borehole, and groundwater samples for such tests and analyzes Groundwater sampling equipment is used to collect water.

  With reference to FIG. 1 and FIG. 2, the configuration of a conventional general groundwater sampling apparatus will be described as follows. Here, FIG. 1 is a diagram illustrating a state before the packer is expanded in the conventional groundwater sampling apparatus. FIG. 2 is a configuration diagram illustrating a state in which the packer is inflated by the expansion fluid and is in close contact with the inner surface of the borehole in the conventional groundwater sampling apparatus.

  The conventional groundwater W sampling apparatus connects the packers 10 and 30 to the upper packer 10 and the lower packer 30 provided at the upper and lower parts, the supply pipes 20 and 40 that supply the expansion fluid to the packer and apply the fluid pressure. The connecting pipe 60 and the guide pipe 50 for guiding the groundwater W existing in the sampling space between the packers 10 and 30 to the outside of the borehole H are configured.

  Here, as shown in FIG. 2, the pair of packers are supplied with fluid via supply pipes 20 and 40, and in close contact with the inner surface of the borehole H while expanding outward, the packer 10 in the borehole H. , 30 regions of interest are hydraulically isolated.

  The supply pipes 20 and 40 include an upper supply pipe 20 that supplies an expansion fluid to the upper packer 10 and a lower supply pipe 40 that communicates with the upper supply pipe 20 and supplies an expansion fluid to the lower packer 30. .

  Therefore, if the expansion fluid is supplied to the upper packer 10 through the upper supply pipe 20, the expansion fluid also flows in the lower supply pipe 40 communicating with the upper packer 10, and the expansion fluid is supplied to the lower packer 30. . That is, the upper packer 10 and the lower packer 30 are expanded at the same time by supplying an expansion fluid to the upper supply pipe 20 and are brought into close contact with the inner surface of the borehole H.

  On the other hand, the connecting pipe 60 is formed with an inflow hole 62 through which the groundwater W existing in the sampling space isolated by the packers 10 and 30 flows. In addition, the connecting pipe 60 that connects the packers 10 and 30 has a plurality of segments connected to each other in an assembling manner, and maintains an interval between the packers 10 and 30. Therefore, the groundwater W in the desired depth section in the borehole H can be collected by adjusting the number of segments of the connecting pipe 60 that connects the packers 10 and 30.

  However, the above-mentioned conventional groundwater sampling device adjusts the number of segments after lifting the groundwater sampling device inserted in the borehole to the ground in order to change the interval between packers to adjust the depth section. Thus, the length of the connecting pipe must be adjusted and then inserted again into the borehole.

  Therefore, there is a problem that a lot of time and labor are spent adjusting the depth of groundwater.

  In addition, since the packer expands and contracts together, it can only collect groundwater within a certain section, and cannot serve as a single packer that collects groundwater above a certain level or below groundwater. There was a problem.

  Further, since the connecting pipe is formed by joining a plurality of segments, and the length of the connecting pipe can be adjusted stepwise according to the number of segments, there is a limit to variously changing the interval between packers.

  The present invention has been devised in order to solve the above-described conventional problems, and an object thereof is to provide a fluid sampling device capable of easily changing the sampling depth and section in a borehole. To do.

  Another object of the present invention is to provide a fluid sampling device that can easily adjust the sampling depth section in the borehole on the ground, and can dramatically reduce the time and labor required for sampling. And

  Another object of the present invention is to provide a fluid sampling device that can hydraulically separate groundwater in a borehole in only one direction and that can also serve as a single packer. And

  Furthermore, another object of the present invention is to provide a fluid sampling device that can continuously adjust the sampling depth section and can change the sampling depth section in various ways as necessary.

In order to achieve the above-mentioned object and solve the problems of the prior art, the present invention is a fluid sampling device that is inserted into a borehole and collects fluid in the borehole, A first packer that selectively adheres to the inner surface, a first supply pipe that communicates with the inside of the first packer and supplies an expansion fluid to the inside of the first packer, and a state separated from the first packer A second packer that selectively adheres to the inner surface of the borehole, and is connected in communication with the inside of the second packer to supply an expansion fluid into the second packer, A second supply pipe that moves with the second packer along the longitudinal direction of the borehole, and a sampling space between the first packer and the second packer, and the borehole Extend outside It made which are constituted by a guide tube for guiding a fluid present in the collection space to the outside. Here, the first packer may be disposed on an upper portion of the second packer.

  Meanwhile, it is preferable that the second supply pipe penetrates the first packer and forms another flow path that does not communicate with the first supply pipe.

The second supply pipe may be provided inside the guide pipe. Further, on the first packer, a packer connecting pipe formed along the longitudinal direction of the borehole and connected to the guide pipe and providing a space for accommodating the second supply pipe on the inside is provided , guide tube communicates with the collecting space through the packer coupling pipe can Rukoto.

  Here, it is preferable that a sealing coupling portion is provided between the packer coupling pipe and the guide pipe to mutually couple the packer coupling pipe and the guide pipe in a sealed state.

  At the same time, it is preferable to include a support member that is coupled to the second packer and moves along the longitudinal direction of the borehole with the second packer through the first packer. Here, the support member may be in the form of a wire.

  The support member may be provided inside the guide tube or outside the guide tube, and may be configured to penetrate the first packer.

  The fluid sampling device according to the present invention having the above-described configuration has the following effects.

  First, there is an advantage that the interval between packers can be adjusted in a state where the sampling device is inserted into the borehole, and the time and labor required for adjusting the sampling depth section can be significantly reduced.

  That is, by moving the second supply pipe in the vertical direction, the position of the second packer connected thereto can be freely determined, and the interval between the packers can be easily adjusted on the ground.

  Therefore, a hydraulic test can be executed at a desired depth and section in the borehole, and groundwater can be collected.

  In particular, by providing a support member for moving the second packer up and down, the interval between the packers can be adjusted by a simple method.

  Second, by independently adjusting the degree of expansion of the first packer and the second packer by forming a supply pipe for supplying the expansion fluid to the first packer and the second packer with independent flow paths that do not communicate with each other, There is an advantage that the groundwater in the borehole can be hydraulically separated only in one direction and can also serve as a single packer.

  As a result, it is possible to selectively collect groundwater above or below a certain level in the borehole, and more various forms of hydraulic tests are possible.

  Thirdly, the interval between packers can be adjusted continuously by moving the second supply pipe, instead of adjusting the interval between packers by a plurality of segments as in the prior art. There is an advantage that the depth section can be variously changed.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention in which the object of the invention is specifically realized will be described with reference to the accompanying drawings. In the description of the present embodiment, the same name and the same reference numeral are used for the same configuration, and the additional description relating to this is omitted.

  The configuration of the fluid sampling device according to the first embodiment of the present invention will be described with reference to FIGS. 3 and 4 as follows. Here, FIG. 3 is a configuration diagram showing a state before the packer is expanded in the groundwater sampling apparatus according to the present embodiment. Moreover, FIG. 4 is a block diagram which shows the state which the packer expanded | swelled by the expansion fluid, and was closely_contact | adhered to the borehole inner surface with the groundwater sampling apparatus which concerns on this embodiment.

  The fluid sampling device according to the present embodiment is a device for sampling the fluid that is inserted into the borehole H and exists in the borehole H, and is largely divided into the first packer 110, the first supply pipe 120, and the second. The packer 130 includes a second supply pipe 140 and a guide pipe 150.

  Here, the object of the collection device according to the present embodiment can be various fluids. Below, groundwater W which exists in the borehole H is illustrated and demonstrated as an example of the fluid used as extraction object.

  The first packer 110 is a component that selectively adheres to the inner surface of the borehole H while being supplied with an expansion fluid and increasing in volume.

  In addition, the first supply pipe 120 supplies an expansion fluid to the first packer 110. Thereby, the 1st packer 110 expands.

  The second packer 130 is provided in a state of being separated from the first packer 110 by a predetermined interval, and is selected as the inner surface of the borehole H while the expansion fluid is supplied and the volume is increased similarly to the first packer 110 described above. In close contact. The second packer 130 is supplied with the expansion fluid by the second supply pipe 140.

  On the other hand, in the present embodiment, the first packer 110 is configured to be an upper part of the second packer 130.

  Here, unlike the conventional case, the first supply pipe 120 and the second supply pipe 140 described above do not communicate with each other and form separate flow paths. As described above, the first supply pipe 120 and the second supply pipe 140 form independent flow paths, so that the degree of expansion of the first packer 110 and the second packer 130 can be adjusted independently.

  The guide tube 150 communicates with the sampling space hydraulically separated by the expansion of the first packer 110 and the second packer 130, and is extended outside the borehole H to guide the fluid existing in the sampling space to the outside. .

  In the present embodiment, specifically, a packer connection pipe 112 formed along the longitudinal direction of the borehole H and connected to the guide pipe 150 is provided on the first packer 110. Such packer connection pipe 112 is configured to be coupled to the guide pipe 150.

  Accordingly, the groundwater W existing in the sampling space flows into the inside of the packer connection pipe 112 through a hole formed in the lower portion of the packer connection pipe 112, and the introduced groundwater W passes through the packer connection pipe 112 to the guide pipe. It will flow to the 150 side.

  In the present embodiment, a sealing coupling part 114 is provided between the packer coupling pipe 112 and the guide pipe 150 so as to mutually couple the packer coupling pipe 112 and the guide pipe 150 in a sealed state. The ground water W flows outside along the packer connecting pipe 112 and the guide pipe 150.

  In the present embodiment, as shown in FIGS. 3 and 4, the second supply pipe 140 is provided inside the guide pipe 150 described above.

  Meanwhile, the groundwater sampling apparatus according to the present invention includes a support member 170 that is coupled to the second packer 130 and penetrates the first packer 110 and moves along the longitudinal direction of the borehole H together with the second packer 130. preferable.

  Although there is no restriction | limiting in the form of the supporting member 170, What has an appropriate pulling strength in order to pull up the 2nd packer 130 is preferable, For example, the wire form which has fixed intensity | strength is applicable.

  Of course, if the second supply pipe 140 has sufficient strength to withstand the resistance force of the second packer 130 ascending, the separate support member 170 is unnecessary. However, the second supply pipe 140 has a minimum strength, and the supporting member 170 assists the supporting force to support the resistance force caused by the rising of the second packer 130. 2 There is an advantage that the strength of the supply pipe 140 need not be increased.

  On the other hand, although not shown in the figure, a pump that generates a forced suction input to pump the fluid in the collection space to the outside can be provided.

  The operation process of the fluid sampling device having the above-described configuration will be described with reference to FIGS. 5a and 5b.

  As described above, the first supply pipe 120 and the second supply pipe 140 form flow paths that are independent of each other, and supply the inflation fluid to the first packer 110 and the second packer 130.

  Therefore, in order to adjust the distance between the first packer 110 and the second packer 130 with the sampling device inserted into the borehole H, the first packer 110 is inserted into the borehole H as shown in FIG. The second packer 130 is moved in a state of being in close contact with the inner surface.

  At this time, the movement of the second packer 130 is performed by pulling up the support member 170 and the second supply pipe 140 that are connected to the second packer 130 and extended to the ground.

  On the contrary, when the second packer 130 is moved downward, the tension of the support member 170 and the second supply pipe 140 is released and the second packer 130 is lowered by its own weight.

  In addition, in order to smoothly move the second packer 130, the second packer 130 is moved after the expansion fluid in the second packer 130 is discharged through the second supply pipe 140.

  In this way, after the second packer 130 is moved to a desired position, as shown in FIG. 5b, the expansion fluid is supplied into the second packer 130 through the second supply pipe 140, and the second packer 130 is supplied. In close contact with the inner surface of the borehole H.

  As described above, the fluid sampling device according to the present embodiment is different from the conventional method in which the sampling device is lifted to the ground to adjust the interval between the packers, and the sampling device is inserted into the borehole H. The position of the second packer 130 can be freely determined by moving the support member 170 and the second supply pipe 140 from the ground in the state.

  Further, by controlling the expansion of the second packer 130 independently of the first packer 110, the groundwater (W) in the borehole H can be hydraulically separated only in one direction, and as a single packer Can also play a role.

  The configuration of the fluid sampling device according to the second embodiment of the present invention will be described with reference to FIG.

  Similar to the first embodiment described above, the fluid sampling device according to the present embodiment includes a first packer 210, a first supply pipe 120, a second packer 130, a second supply pipe 240, and a guide pipe 150. It is configured with. Further, the first supply pipe 120 and the second supply pipe 240 do not communicate with each other and form separate flow paths, whereby the expansion of the first packer 210 and the second packer 130 can be controlled independently. .

  However, this embodiment differs from the first embodiment described above in that the second supply pipe 240 is not provided in the guide pipe 150 but is provided separately outside the guide pipe 150, The first and second packers 210 are connected and are extended to the ground.

  At this time, the second supply pipe 240 does not communicate with the first packer 210 so that the expansion fluid of the first packer 210 does not flow to the outside, and is capable of relative movement in relation to the first packer 210. Composed.

  As described above, the preferred embodiments of the present invention have been described with reference to the preferred embodiments of the present invention. However, those skilled in the relevant art will not depart from the spirit and scope of the present invention described in the claims. Thus, it will be understood that the present invention can be variously modified and changed. In other words, the technical scope of the present invention is defined based on the claims, and is not limited by the best mode for carrying out the invention.

It is a block diagram which shows the conventional fluid sampling device. It is a block diagram which shows the form which the packer expanded by the fluid sampling apparatus of FIG. 1 and closely_contact | adhered to the borehole inner surface. It is a lineblock diagram showing the fluid sampling device concerning one embodiment of the present invention. It is a block diagram which shows the form which the packer expanded by the fluid sampling apparatus of FIG. 3, and contact | adhered to the borehole inner surface. It is a 1st block diagram which shows the process in which a packer is moved and the process which adjusts the collection area of a fluid is shown in order. It is a 2nd block diagram which shows the process in which a packer is moved and the process of adjusting the fluid collection | recovery area is shown in order. It is a block diagram which shows the fluid sampling device which concerns on other embodiment of this invention.

Explanation of symbols

110: 1st packer 112: Packer connection pipe 114: Sealing coupling part 120: 1st supply pipe 130: 2nd packer 140: 2nd supply pipe 150: Guide pipe 170: Support member H: Borehole W: Groundwater

Claims (10)

A fluid collection device for collecting fluid in the borehole inserted into the borehole,
A first packer that selectively adheres to the inner surface of the borehole;
A first supply pipe that communicates with the interior of the first packer and supplies an inflation fluid to the interior of the first packer;
A second packer that is provided in a state of being separated from the first packer, and that selectively adheres to the inner surface of the borehole;
The second packer is connected in communication with the inside of the second packer, supplies an expansion fluid to the inside of the second packer, and moves together with the second packer along the longitudinal direction of the borehole with respect to the first packer . Two supply pipes;
A guide tube that communicates with the sampling space between the first packer and the second packer and that extends outside the borehole and guides the fluid existing in the sampling space to the outside;
A fluid sampling device comprising:   The fluid sampling apparatus according to claim 1, wherein the first packer is disposed on an upper portion of the second packer.   3. The fluid sampling apparatus according to claim 1, wherein the second supply pipe passes through the first packer and forms another flow path that does not communicate with the first supply pipe.   The fluid sampling apparatus according to claim 1, wherein the second supply pipe is provided inside the guide pipe. On the first packer, there is provided a packer connection pipe that is formed along the longitudinal direction of the borehole and is connected to the guide pipe, and provides a space for accommodating the second supply pipe on the inside .
The guide tube, the fluid collection apparatus according to any one of claims 1 to 4, characterized that you have communicated with the collection space through the packer coupling pipe.   The fluid according to claim 5, wherein a sealing coupling portion is provided between the packer coupling pipe and the guide pipe to mutually couple the packer coupling pipe and the guide pipe in a sealed state. Collection device.   7. The support device according to claim 1, further comprising a support member that is coupled to the second packer, moves through the first packer, and moves along the longitudinal direction of the borehole with the second packer. The fluid sampling apparatus according to item 1. The support member is
8. The fluid sampling device according to claim 7, wherein the fluid sampling device is in the form of a wire. The support member is
The fluid sampling device according to claim 7 or 8, wherein the fluid sampling device is provided inside the guide tube. The support member is
The fluid collection device according to claim 7 or 8, wherein the fluid collection device is provided outside the guide tube and penetrates the first packer.

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