A device for conducting marine static penetration and sampling in the same hole

Abstract

The present invention discloses a device for conducting marine static penetration and sampling in the same hole, comprising an outer cylinder, an inner cylinder coaxially fixed inside the outer cylinder, a static penetration device installed at the axial center of the inner cylinder, and a sampling cylinder fixedly installed on the outer wall of the static penetration device, wherein a piston is fixedly installed on the outer wall of the static penetration device, and the piston is located above the sampling cylinder. The beneficial effect of the present invention is that since static penetration data and drilling samples are obtained simultaneously, the static penetration data and drilling sample data are accurately compared. Therefore, by comparing the formation information obtained from the static penetration data and drilling sample data at the same location, the static penetration data processing can be optimized, making the static penetration data processing more accurate and reducing the impact of the multi-solution of the static penetration data processing.

Description

Technical Field

[0001] The present invention relates to the technical field of marine engineering survey, and in particular to a device for performing marine static penetration and sampling in the same hole. Background Art

[0002] In marine engineering surveys, static penetration sounding is often used as an in-situ test method for rapidly obtaining soil parameters. Due to the multi-solution nature of static penetration sounding data, parallel control holes are often drilled within 2-5 meters of the static penetration sounding hole to obtain stratigraphic data. Both engineering methods are essential. Existing technology can only drill separate holes; it is not possible to perform marine static penetration sounding and coring in the same hole. Due to factors such as hole positioning errors and hole inclination, parallel control holes may not be parallel, making the comparison between static penetration sounding data and drilled sample data inaccurate. Summary of the Invention

[0003] In response to the above problems, the present invention proposes a device for conducting marine static sounding and sampling in the same hole, which mainly solves the problem that static sounding holes and parallel control holes need to be opened independently, resulting in inaccurate comparison between static sounding data and drilling sample data.

[0004] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0005] A device for performing marine static sounding and sampling in the same hole comprises an outer cylinder, an inner cylinder coaxially fixed inside the outer cylinder, a static sounding device installed at the axial center position of the inner cylinder, and a sampling cylinder fixedly installed on the outer wall of the static sounding device. A piston is fixedly installed on the outer wall of the static sounding device, and the piston is located above the sampling cylinder.

[0006] In some embodiments, the static penetration device includes a probe, which is fixedly connected to the penetration rod through a probe joint. A stabilizer is installed on the inner wall of the lower end of the sampling tube, and a retaining ring for limiting is installed at the lower end of the stabilizer.

[0007] In some embodiments, a lower limiting ring is provided on the lower portion of the inner wall of the outer cylinder, and a lower limiting joint matching the lower limiting ring is provided on the outer wall of the inner cylinder.

[0008] In some embodiments, an upper limit ring is provided on the upper inner wall of the outer cylinder, an umbrella-shaped spring clip cooperating with the upper limit ring is provided on the outer wall of the inner cylinder, a head hoop is installed on the upper end of the umbrella-shaped spring clip, and a pipeline joint is installed on the upper end of the probe rod.

[0009] In some embodiments, a water return hole is radially provided on the pipe wall of the lower limit joint, and a filter is installed in the water return hole.

[0010] In some embodiments, a drainage hole is provided at the upper end of the sampling cylinder, and the drainage hole is used to connect the sampling cylinder and the inner cylinder.

[0011] In some embodiments, the diameter of the lower end of the drainage hole is narrowed to form a water hole, and a steel ball is movably installed on the upper end surface of the water hole.

[0012] The beneficial effects of the present invention are:

[0013] (1) Since the static penetration data and drilling samples are obtained at the same time, the static penetration data and the drilling sample data are accurately compared. Therefore, by comparing the formation information obtained from the static penetration data and the drilling sample data at the same location, the static penetration data processing can be optimized, making the static penetration data processing more accurate and reducing the impact of the multi-solution of the static penetration data processing.

[0014] (2) By installing a sampling tube on the outer wall of the static penetration device, the two are controlled by the piston to move downward at the same time, so that marine static penetration operation and drilling coring operation can be carried out simultaneously in the same hole. The static penetration and drilling coring operations can be completed in one round, which significantly improves the operation efficiency and saves operation costs.

[0015] (3) Since the static penetration device and the sampling tube are drilled by the thrust of the piston, static pressure coring is achieved, which avoids the disturbance of the formation sample by rotary coring and ensures the authenticity of the formation sample.

[0016] (4) The static penetration tool and the coring tool are integrated into one device, which expands the function of the device and saves the manufacturing cost of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a device for conducting marine static penetration and sampling in the same hole disclosed in an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A partial enlarged view of area A marked in the middle;

[0019] Figure 3 for Figure 1 A partial enlarged view of the area B marked in the middle;

[0020] Figure 4 for Figure 1 A partial enlarged view of the area C marked in the middle;

[0021] Figure 5 for Figure 1 A partial enlarged view of the D area marked in the middle;

[0022] Among them: 1-outer tube, 2-inner tube, 3-static penetration device, 31-probe, 32-probe connector, 33-probe rod, 4-sampling tube, 5-piston, 6-centralizer, 7-retaining ring, 8-lower limit ring, 9-lower limit connector, 10-upper limit ring, 11-umbrella-shaped spring clip, 12-head hoop, 13-pipeline connector, 14-return water hole, 15-drainage hole, 16-water hole, 17-steel ball. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] Examples of embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0026] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0027] This embodiment proposes a device for conducting marine static penetration and sampling in the same hole. The structure of the device uses Figure 1 The local method diagram of the four areas A, B, C, and D shown in the figure is used to represent Figure 2 Indicates area A, Figure 3 Indicates area B, Figure 4 Indicates area C, Figure 5It represents area D, including an outer cylinder 1, an inner cylinder 2 coaxially fixed inside the outer cylinder 1, a static penetration device 3 installed at the axial center position of the inner cylinder 2, and a sampling cylinder 4 fixedly installed on the outer wall of the static penetration device 3. A piston 5 is fixedly installed on the outer wall of the static penetration device 3, and the piston 5 is located above the sampling cylinder 4.

[0028] This embodiment has the following four major advantages: First, because the CPE data and drill samples are acquired simultaneously, the CPE data and drill sample data can be accurately compared. Therefore, by comparing the formation information obtained from the CPE data and drill sample data at the same location, CPE data processing can be optimized, making CPE data processing more accurate and reducing the impact of multi-solution issues in CPE data processing. Second, by installing a sampling tube 4 on the outer wall of the CPE device 3, both are controlled by a piston 5 to move downward simultaneously, allowing marine CPE and coring operations to be performed simultaneously within the same hole. Both CPE and coring can be completed in a single pass (the resulting sample has an annular cross-section), significantly improving operational efficiency and reducing operating costs. Third, because the CPE device 3 and sampling tube 4 are driven by the thrust of the piston 5, static coring is achieved, avoiding the disturbance of formation samples caused by rotary coring and ensuring the authenticity of the formation samples. Fourth, the static penetration tool and the coring tool are integrated into one device, which expands the function of the device and saves the manufacturing cost of the device.

[0029] The static penetration device 3 includes a probe 31, which is fixedly connected to the penetration rod 33 through a probe connector 32. A centralizer 6 is installed on the inner wall of the lower end of the sampling tube 4, and a retaining ring 7 for limiting is installed at the lower end of the centralizer 6 to prevent the centralizer 6 from falling off.

[0030] A lower limit ring 8 is provided on the lower part of the inner wall of the outer cylinder 1, and a lower limit joint 9 matching the lower limit ring 8 is provided on the outer wall of the inner cylinder 2. When the inner cylinder 2 enters the outer cylinder 1, the lower limit ring 8 serves as a limit piece of the lower limit joint 9, preventing the inner cylinder 2 from moving further downward.

[0031] An upper limit ring 10 is provided on the upper part of the inner wall of the outer tube 1, and an umbrella-shaped spring clip 11 is provided on the outer wall of the inner tube 2 to cooperate with the upper limit ring 10. A head hoop 12 is installed on the upper end of the umbrella-shaped spring clip 11, and a pipeline joint 13 is installed on the upper end of the feeler rod 33. When the above-mentioned lower limit joint 9 is limited by the lower limit ring 8, the tail of the umbrella-shaped spring clip 11 completely enters the upper limit ring 10, and the spring piece opened by the umbrella-shaped spring clip 11 prevents the inner tube 2 from moving upward, thereby finally completing the fixation of the inner tube 2 in the vertical direction.

[0032] A water return hole 14 is radially provided on the pipe wall of the lower limit joint 9 , and a filter is installed in the water return hole 14 to filter impurities and sand in the water to prevent impurities and sand from entering the device and scratching the inner wall of the inner tube 2 .

[0033] Taking into account that the upper inner wall of the sampling tube 4 will be subjected to strong pressure during the downward pressing process, and to prevent the accumulation of air at the upper end of the sampling tube 4 during the sampling process, resulting in sampling failure, this embodiment provides one of the preferred implementation schemes, that is, a drainage hole 15 is provided at the upper end of the sampling tube 4, and the drainage hole 15 is used to connect the sampling tube 4 and the inner tube 2, and the moisture in the sampling tube 4 is discharged from the drainage hole 15 to the inner tube 2.

[0034] Based on the above scheme, further, the aperture of the lower end of the drainage hole 15 is narrowed to form a water hole 16, and a steel ball 17 is movably installed on the upper end surface of the water hole 16. The steel ball 17 is confined in the drainage hole 15. This design effectively releases the pressure inside the sampling tube 4, and since the movable space of the steel ball 17 is small, the water hole 16 can only allow seawater to pass through, avoiding deviations in the analysis results due to leakage of in-situ samples.

[0035] It should be noted that the above-mentioned scheme is intended to illustrate the inventive point of the present invention and to teach those skilled in the art to implement the scheme. Existing marine sand static probing tools, umbilical cables, or BHA tools and other devices will not be described in detail and should be regarded as the structures existing in this embodiment.

[0036] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made based on the essence of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A method for using a device for conducting marine static penetration and sampling in the same hole, characterized in that: The device comprises an outer cylinder, an inner cylinder coaxially fixed inside the outer cylinder, a static penetration device installed at the axial center of the inner cylinder, and a sampling tube fixedly installed on the outer wall of the static penetration device. A piston is fixedly installed on the outer wall of the static penetration device, and the piston is located above the sampling tube. The static penetration device and the sampling tube are controlled by the piston to move downward simultaneously, and marine static penetration and coring operations are carried out simultaneously in the same hole. The static penetration and coring operations are completed in one round, and the cross-section of the obtained sample is annular. The static penetration device includes a probe, which is fixedly connected to the penetration rod through a probe joint. A centralizer is installed on the inner wall of the lower end of the sampling tube, and a retaining ring for limiting is installed at the lower end of the centralizer; A lower limit ring is provided at the lower part of the inner wall of the outer cylinder, and a lower limit joint matching the lower limit ring is provided on the outer wall of the inner cylinder. When the inner cylinder enters the outer cylinder, the lower limit ring acts as a limiter of the lower limit joint, preventing the inner cylinder from moving further downward. An upper limit ring is provided on the upper part of the inner wall of the outer cylinder, and an umbrella-shaped spring clip cooperating with the upper limit ring is provided on the outer wall of the inner cylinder. A head hoop is installed on the upper end of the umbrella-shaped spring clip, and a pipeline joint is installed on the upper end of the feeler rod. When the lower limit joint is limited by the lower limit ring, the tail of the umbrella-shaped spring clip completely enters the upper limit ring, and the spring piece opened by the umbrella-shaped spring clip prevents the inner cylinder from moving upward, thereby completing the vertical fixation of the inner cylinder; A water return hole is radially provided on the pipe wall of the lower limit joint, and a filter is installed in the water return hole; The upper end of the sampling cylinder is provided with a drainage hole, and the drainage hole is used to connect the sampling cylinder and the inner cylinder, and the moisture in the sampling cylinder is discharged into the inner cylinder through the drainage hole; The lower end of the drainage hole is narrowed to form a water hole. A steel ball is movably installed on the upper end surface of the water hole. The water hole can only allow seawater to pass through, avoiding deviation in analysis results due to leakage of in-situ samples.

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