CN110095047B - Tool for measuring inclination angle of directional drilling core - Google Patents

Tool for measuring inclination angle of directional drilling core Download PDF

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Publication number
CN110095047B
CN110095047B CN201910507897.XA CN201910507897A CN110095047B CN 110095047 B CN110095047 B CN 110095047B CN 201910507897 A CN201910507897 A CN 201910507897A CN 110095047 B CN110095047 B CN 110095047B
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core
scale
flexible
spring steel
steel sheet
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CN110095047A (en
Inventor
邹平
王飞飞
虎万杰
马增
孟中华
李爱兵
刘正宇
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Changsha Institute of Mining Research Co Ltd
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Changsha Institute of Mining Research Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/24Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Abstract

The invention provides a tool for measuring a dip angle of a directional drilling rock core, which comprises a transparent flexible slot I, a flexible scale plate arranged in the flexible slot I and bendable spring steel sheets connected to the upper end and the lower end of the flexible slot I, wherein when external bending stress is applied, the spring steel sheets in a straight state can be curled to anchor the outer cylindrical surface of the rock core, and the flexible scale plate can be automatically attached to the outer cylindrical surface of the rock core without being pressed by hands; the flexible slot I is connected with a scale with a protractor through an upper surrounding line and a lower surrounding line, and the scale and the protractor can revolve around the core under the guidance of the surrounding line. The inclination and the inclination angle can be measured at the same time, and the component for measuring the inclination angle of the rock core can be used as reference references of each other, so that the measurement accuracy is mutually assisted and improved, the measurement work of a measurer is greatly facilitated, the time is saved, and the working efficiency of the measurer and the accuracy of a measurement result are improved.

Description

Tool for measuring inclination angle of directional drilling core
Technical Field
The invention relates to the technical field of geotechnical engineering investigation, in particular to a tool for measuring a dip angle of a directional drilling core.
Background
The inclination angle of the joint level in the directional drilling core is an important way to reveal the joint information of the underground rock formation. The slope geological model of the open stope can be accurately established through the inclination angle of the joint surface in the drill core, and the method has important reference value in slope stability evaluation. In borehole core cataloging, the dip angle of the directional borehole core is generally referred to as the α angle and the dip is generally referred to as the β angle. In addition, the two angles can also verify the accuracy of the pitch crack inclination angle and the inclination of the surface measurement of the slope of the open stope, and serve as supplementary data to further accurately evaluate the slope stability.
Currently, angle ruler and linear protractor are respectively adopted for measuring the angle alpha and the angle beta. The angle ruler is a common angle gauge which can be purchased in the market. The linear protractor is a transparent plastic plate printed with angle lines and used for measuring angles, the plastic plate can be bent, when the angle protractor is used for measuring, the transparent plastic plate is wrapped on the surface of a rock core, zero-degree lines on the transparent plastic plate are overlapped with bus bars on the surface of the rock core, then the value of the angle beta is read at the position of the lowest point corresponding to the structural surface of the rock core, and in the use process, a measurer needs to pull the plastic plate tightly by hands all the time so that the plastic plate is clung to the rock core, and therefore, the value of the angle beta is read, and the angle protractor is extremely inconvenient to use.
In addition, the measurement of the angle alpha and the angle beta is separately and independently measured at present, the axial length of the core of one directional drilling hole is generally about 300m, and the optical structural surface of the core of one directional drilling hole has thousands of optical structural surfaces, so that when the angle alpha and the angle beta of different structural surfaces are measured, an angle gauge and a linear protractor are required to be frequently replaced, the complicated and troublesome operation is carried out, the time is delayed, the measurement of thousands of structural surfaces can take a long time, and the accuracy of the measurement result is difficult to ensure.
Therefore, a simple, convenient and accurate scheme is needed in the prior art to save time and improve the working efficiency of measuring staff.
Disclosure of Invention
The invention aims to provide a tool for measuring a dip angle of a directional drilling core, which aims to solve the problems in the prior art.
The utility model provides a trend inclination measuring tool of directional drilling rock core, includes rock core inclination measuring assembly and rock core trend measuring assembly, rock core inclination measuring assembly includes that go up the round wire, down the round wire, scale and be used for measuring the protractor of rock core alpha angle, the scale upper end is provided with the pointer, the rotatable connection of protractor is at the root of pointer.
The core trend measurement assembly comprises a transparent flexible scale plate, a transparent flexible slot I and automatically bendable spring steel sheets which are connected to the upper end and the lower end of the flexible slot I when a core is vertically arranged, one side of the flexible slot I in the left-right direction is provided with an opening I, the other side of the flexible slot I is closed, the size of the flexible slot I is matched with that of the flexible scale plate, the transparent flexible scale plate is inserted into the flexible slot I from the transparent slot I, beta angle scale marks which can be used for measuring the trend of an oriented core structural surface are arranged on the flexible scale plate, during measurement, 0 scale marks on the left side of the flexible scale plate of the measurement tool are used for being aligned with the oriented lines of the core, the length direction of the spring steel sheets in the straight state is arranged along the tangential direction of the circumference of the core, the spring steel sheets in the straight state can automatically curl when being subjected to external applied bending stress to hold the core, and the flexible scale plates can be automatically attached to the outer cylindrical surface along with the automatic bending of the spring steel sheets.
The length direction of scale is along the vertical direction setting of width direction of spring steel sheet, when the rock core is vertical, be equipped with the second scale mark that can be used to measure length or distance on the scale, the middle part and the lower extreme of scale are equipped with through wires hole and lower through wires hole respectively, go up the last through wires hole of encircling the line and pass the scale, go up the two terminal connection of encircling the line and correspond blind end and the two contour positions of opening one respectively in flexible slot one upper end, down encircle the line and pass the lower through wires hole of scale, down encircle the two terminal connection of line and correspond blind end and two contour positions of opening one respectively in flexible slot one, go up encircling the line and encircle the main part of line all be located spring steel sheet and flexible slot one's back to the spring steel sheet is crooked and live the rock core one face is openly, this back is the opposite face with openly, go up encircling the line and down the winding wire length of winding and all be greater than or equal to flexible slot one and flexible scale plate back circumference for the scale flexible scale plate is after with the outer cylinder together crooked and laminating rock core, can be at last encircling and encircle down and encircle wire winding down and to establish down and be specific through wires hole and down and around down the line winding wire winding hole and the relative angle down and the relative angle between the relative through hole and the rock core hole can be formed simultaneously.
Further, the lengths of the upper encircling line and the lower encircling line are equal, and the lengths of the upper encircling line and the lower encircling line are set to be just one circle of the outer cylindrical surface of the core, which is wrapped with the first flexible slot and the flexible scale plate, along with the bending of the spring steel sheet, so that the length direction of the staff gauge at the moment can always keep consistent with the axial direction of the core, and when the angle gauge measures the alpha angle of the structural surface of the core, the position adjustment of the staff gauge along the axial direction of the core can be reduced or omitted, so that the staff gauge can automatically mark the position of the lowest point or the highest point of the current structural surface on the flexible scale plate, and the beta angle value can be conveniently and rapidly read according to the marked position.
Further, scale, protractor are transparent material, the scale upper end is provided with the mark line that coincides with the protractor center of rotation, the protractor passes through the rotatable connection of screw and scale upper end, be rectangular shape hole in the hole that is used for installing the screw on the scale, rectangular shape hole's length direction is unanimous with scale length direction for the position of protractor can follow scale length direction and remove.
Further, the upper encircling line and the lower encircling line both comprise hard segments and soft segments, the hard segments are positioned at two ends for being connected with the flexible slots and are used for roughly limiting the longitudinal position of the scale, and the soft segments are positioned in the middle for penetrating through the upper threading holes or the lower threading holes and are convenient to encircle around the rock core.
Further, the core trend measurement assembly further comprises a soft silica gel wrapping layer wrapped outside the spring steel sheet, and a third scale mark used for measuring the circumferential length of the core is arranged on the silica gel wrapping layer.
Preferably, the length of the spring steel sheet is greater than or equal to the circumference of the outer column surface of the core.
Preferably, the flexible scale plate is a transparent plastic sheet.
Further, the core trend measurement assembly further comprises a transparent flexible slot II which is connected with the flexible slot I and used for loading the spring steel sheet into the flexible slot II, the size of the flexible slot II is matched with that of the spring steel sheet, a separation line is arranged between the flexible slot I and the flexible slot II, the flexible slot II is provided with an opening II, and the spring steel sheet can be loaded into the flexible slot II through the opening II.
Preferably, the upper end and the lower end of the flexible scale plate are respectively provided with a spring steel sheet, the spring steel sheet comprises a first spring steel sheet and a second spring steel sheet which are respectively positioned at the upper end and the lower end of the flexible scale plate, two separation lines are correspondingly arranged, the second flexible slots are distributed at the upper end and the lower end of the first flexible slot, and the second opening is respectively communicated with the two second flexible slots; part or all scale marks of the flexible scale plate extend from one end connected with the first spring steel sheet to one end connected with the second spring steel sheet; the connection positions of the upper annular winding wire and the first flexible slot are located on the separation line.
Preferably, the transparent flexible slot is made of plastic, and the dividing line is a dividing line processed and arranged in a hot pressing mode.
The invention has at least the following beneficial effects:
the invention provides a tool for measuring the inclination angle of a directional drilling core, which can measure the inclination angle and the inclination angle of the core at the same time, and in the measuring process, a core inclination angle measuring assembly and a core inclination angle measuring assembly can be mutually used as reference standards of each other, mutually assist and improve the measuring accuracy, thereby greatly facilitating the measuring work of a measurer, saving the time and improving the working efficiency of the measurer and the accuracy of a measuring result.
According to the inclination measuring assembly, the two ends of the existing flexible scale plate are connected with the flexible spring steel sheets, when the inclination measuring assembly is used for measuring, the outer cylindrical surface of a rock core can be held tightly by the spring steel sheets only by lightly pulling the flexible scale plate, the flexible scale plate can be automatically attached to the cylindrical surface of the rock core, the inclination measuring assembly is simple and convenient to use, and can be recycled, according to different circumferences of the rock core, only the flexible scale plates with different specifications are needed to be replaced, two hands of a measurer are liberated, the time is saved, a great amount of time can be saved for measuring the inclination of the rock core with the length of hundreds of meters, the influence of human errors on the result can be avoided, and the reliability is good.
In the invention, the flexible scale plate and the spring steel sheet are arranged in the transparent flexible slot, so that on one hand, measurement reading is not influenced, and on the other hand, certain protection effect is provided for scale marks on the flexible scale plate and the spring steel sheet.
In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a side view block diagram of a tool for dip angle measurement of a directional drilling core in accordance with a preferred embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of M-M of FIG. 1 in accordance with the present invention;
fig. 3 is a front view block diagram (core vertical) of the dip angle measurement tool of the directional drilling core of the preferred embodiment of the present invention.
In the figure: the core inclination angle measuring device comprises a core inclination angle measuring component, a core inclination measuring component, an upper encircling line 11-, a lower encircling line 12-, a hard segment 100-, a soft segment 101-, a scale 13-, an upper threading hole 131-, a lower threading hole 132-and a mark line 133-respectively, a strip-shaped hole 134-and a strip-shaped hole 14-protractor 15-and a screw 21-and a flexible scale plate 22-and a flexible slot I, a spring steel sheet 23-and a spring steel sheet 231-and a spring steel sheet 232-and a long scale line 24-and a long scale line 25-and a short scale line 27-and a flexible slot II 271-and a second opening 28-and a separation line 3-and a core 31-and a core structural surface 32-respectively.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawings, but the invention can be implemented in a number of different ways, which are defined and covered by the claims.
Referring to fig. 1-3, a tool for measuring dip angle of directional drilling core comprises a core dip angle measuring assembly 1 and a core dip angle measuring assembly 2, wherein the core dip angle measuring assembly comprises an upper encircling wire 11, a lower encircling wire 12, a scale 13 and a rotatable protractor 14 for measuring alpha angle of the core.
The core trend measurement assembly comprises a transparent flexible scale plate 21, a transparent flexible slot I22 and an automatically bendable spring steel sheet 23 connected to the upper end and the lower end of the flexible slot I, one side of the flexible slot I in the left-right direction is provided with an opening I24, the other side of the flexible slot I is closed, the size of the flexible slot I is matched with that of the flexible scale plate, the transparent flexible scale plate is inserted into the flexible slot I from the transparent slot I, a beta angle scale line which can be used for measuring the trend of the structural surface of the directional core is arranged on the flexible scale plate, in the embodiment, the beta angle scale line is divided into a long scale line 25 and a short scale line 26, the span between two adjacent long scale lines 25 is 10 degrees, the span between two adjacent short scale lines 26 is 2 degrees, during measurement, the 0 scale line on the left side of the flexible scale plate of the measurement tool is aligned with the directional line 32 of the core 3, the length direction of the spring steel sheet in a flat state is arranged along the tangential direction of the circumference of the core, when the flexible scale plate is subjected to externally applied bending stress, the spring steel sheet in the flat state can automatically curl to clamp the outer cylindrical surface of the core, and the outer cylindrical surface of the core is not required to be pulled by hand or pressed along with the automatic bending of the flexible scale line.
In this embodiment, the length direction of scale sets up along the width direction (namely the upper and lower direction in fig. 1 and 2) of spring steel sheet, be equipped with the second scale mark (not shown in the figure) that can be used to measure length or distance on the scale, middle part and the lower extreme of scale are equipped with threading hole 131 and lower through wires hole 132 respectively, go up the last through wires hole that encircles the line and pass the scale, go up two ends of encircling the line and connect respectively at the two contour positions that the upper end corresponds blind end and opening one in flexible slot, down encircle the line and pass the lower through wires hole of scale, connect respectively at the two contour positions that the blind end corresponds blind end and opening one in flexible slot lower extreme down around the line, go up the main part of encircling the line and down around the line and all be located spring steel sheet and flexible slot one's back, this back is the opposite one with the direction of spring steel sheet automatic bending and holding, go up around the line and down around the length of wire winding wire both be greater than or equal to the flexible slot one and flexible scale after the flexible scale plate of outer cylinder parcel for flexible scale plate is at the flexible scale steel sheet bending and laminating, and the wire winding hole is the angle of winding down can be formed with the core down through wire winding hole and the relative angle of winding hole and the core down, and the core down through wire winding hole down can be the relative angle down, and the core down the relative angle of winding hole is formed. The specific operation process is as follows: after the flexible scale plate is automatically attached to the outer cylindrical surface of the rock core along with the bending of the spring steel sheet, the scale is moved to the lowest point or the highest point of the structural surface 31 of the alignment rock core, the edge of the scale is kept coincident with or parallel to the long scale line in the nearest beta angle scale line as far as possible, so that the length direction of the scale is coincident with the axial direction of the rock core, at the moment, the scale can accurately mark the numerical value of the current beta angle on the beta angle scale line of the flexible scale plate, and the numerical value of the beta angle is read, so that the error of human eyes on the position is avoided; the edge of the scale is kept to be coincident with or parallel to the long scale line in the nearest beta angle scale line, the protractor is rotated to enable the 0 scale line of the protractor to be coincident with the core structural surface 31 along the radial direction of the core, at the moment, the angle indicated by the mark line of the scale is the value of the alpha angle, and the scale is not easy to deflect because the beta angle scale line is used as the positioning reference of the scale, and the value of the alpha angle is more accurate. The rock core inclination angle measuring assembly and the rock core inclination measuring assembly are mutually used as references, mutually assist, and are high in accuracy.
In this embodiment, the lengths of the upper circumferential line and the lower circumferential line are equal, and the lengths of the upper circumferential line and the lower circumferential line are both set to be just one circle around the outer cylindrical surface of the core wrapped with the first flexible slot and the flexible scale plate along with the bending of the spring steel sheet, so that the length direction of the scale at the moment can always keep consistent with the axial direction of the core, and when the protractor measures the alpha angle of the core structural surface, the scale does not need to be manually adjusted along the axial direction of the core, and only needs to be properly adjusted on the revolution path of the scale, the position of the lowest point or the highest point of the current structural surface can be automatically marked in the beta angle scale line of the flexible scale plate by the scale, thereby being convenient for quickly reading the beta angle value according to the marked position.
In this embodiment, scale, protractor are transparent plastic material, the scale upper end is provided with the mark line 133 that coincides with the protractor rotation center, the protractor passes through screw 15 and the rotatable connection of scale upper end, the hole that is used for installing the screw on the scale is rectangular shape hole 134, marks the line and coincides with rectangular shape hole's width direction's symmetry central line, rectangular shape hole's length direction and scale length direction unanimity for the position of protractor can be followed scale length direction and removed, thereby adapts to the rock core structural plane of different forms.
In this embodiment, the upper and lower surrounding wires each include a hard segment 100 and a soft segment 101, the hard segment is located at two ends for connecting with the flexible slots and is used for defining the longitudinal position of the scale, and the soft segment is located in the middle for passing through the upper or lower threading hole and is convenient for surrounding the core. The hard segment can be a hard iron wire, the soft segment can be a soft iron wire or a soft copper wire with rubber, one end of the hard iron wire is adhered to the first flexible slot, the other end of the hard iron wire is provided with a connecting ring, and the tail end of the soft iron wire or the soft copper wire is bound and connected with the hard iron wire through the connecting ring.
In this embodiment, the core trend measurement assembly further includes a soft silica gel wrapping layer wrapped outside the spring steel sheet, and a third scale mark (not shown in the figure) for measuring the circumferential length of the core is provided on the silica gel wrapping layer, and the existing tape in the market can also be directly used.
In this embodiment, the length of the spring steel sheet is equal to the circumference of the outer cylindrical surface of the core, and the spring steel sheet just can clamp the core.
In this embodiment, the flexible scale plate is a transparent plastic sheet.
In this embodiment, the core trend measuring assembly further includes a second transparent flexible slot 27 connected to the first flexible slot for accommodating the spring steel sheet therein, the second flexible slot being sized to match the spring steel sheet, a separation line 28 being disposed between the first flexible slot and the second flexible slot, the second flexible slot having a second opening 271, and the spring steel sheet being insertable into the second flexible slot through the second opening.
In this embodiment, the upper and lower ends of the flexible scale plate are respectively provided with a spring steel sheet, the spring steel sheet includes a first spring steel sheet 231 and a second spring steel sheet 232 respectively located at the upper and lower ends of the flexible scale plate, and correspondingly, the two separation lines 28 are two, the second flexible slots are two distributed at the upper and lower ends of the first flexible slot, and the second opening is two communicated with the second flexible slots respectively; the slit-ten graduation line of the flexible graduation board extends from one end of the first connecting spring steel sheet to one end of the second connecting spring steel sheet (namely, the long graduation line 25). The connection position of the upper annular winding wire and the first flexible slot is respectively positioned on the upper separation wire and the lower separation wire,
in this embodiment, the transparent flexible slot is made of plastic, and the dividing line is a dividing line processed and set in a hot-pressing manner.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A tool for measuring dip angle of a directional drilling core, which is characterized by comprising a core dip angle measuring assembly (1) and a core dip angle measuring assembly (2), wherein the core dip angle measuring assembly comprises an upper encircling wire (11), a lower encircling wire (12), a scale (13) and a rotatable protractor (14) for measuring alpha angle of the core;
the core trend measurement assembly comprises a transparent flexible scale plate (21), a transparent flexible slot I (22) and automatically bendable spring steel sheets (23) which are connected to the upper end and the lower end of the flexible slot I when a core is vertically arranged, one side of the flexible slot I in the left-right direction is provided with an opening I (24), the other side of the flexible slot I is closed, the size of the flexible slot I is matched with that of the flexible scale plate, the transparent flexible scale plate is inserted into the flexible slot I through the opening I, beta angle scale lines (25/26) which can be used for measuring the trend of an oriented core structural surface are arranged on the flexible scale plate, during measurement, 0 scale lines on the left side of the flexible scale plate of the measurement tool are used for being aligned with oriented lines (32) of the core (3), the length direction of the spring steel sheets in a flat state is arranged along the tangential direction of the circumference of the core, the spring steel sheets in the flat state can automatically curl to clamp the outer cylindrical surface of the core when the spring steel sheets are subjected to external applied bending stress, and the flexible scale plate can automatically bend to be attached to the outer cylindrical surface of the core along with the automatic bending of the spring steel sheets;
the length direction of the scale is along the width direction of the spring steel sheet, namely the vertical direction of the core, the middle part and the lower end of the scale are respectively provided with an upper threading hole (131) and a lower threading hole (132), the upper encircling line passes through the upper threading hole of the scale, the two ends of the upper encircling line are respectively connected at two equal-height positions corresponding to the closed end and the opening I of the upper end of the flexible slot, the lower encircling line passes through the lower threading hole of the scale, the two ends of the lower encircling line are respectively connected at two equal-height positions corresponding to the closed end and the opening I of the lower end of the flexible slot, the main parts of the upper encircling line and the lower encircling line are respectively positioned at the back surfaces of the spring steel sheet and the flexible slot I, one surface of the upper encircling line and the core is the front surface, the back surface opposite to the front surface, and the length of the upper encircling line and the lower encircling line are respectively greater than or equal to the circumference after the outer cylindrical surface of the flexible slot I and the flexible scale, so that the flexible scale plate bends together with the spring steel sheet and the outer cylindrical surface of the core, the scale can move under the guide of the upper encircling line and the lower encircling line to the center of the flexible slot, and the lower encircling line is specifically arranged at the two equal-height positions corresponding to the closed end and the opening I of the opening I, the main part of the upper encircling line and the lower encircling line is positioned at the back surface of the core, and the upper encircling line and the lower encircling line and the core through the threading hole (131) and the core through the threading hole (11) and the core through hole (132) and the core through hole (11) and the core) at the relative measurement angle;
the lengths of the upper encircling line and the lower encircling line are equal, and the lengths of the upper encircling line and the lower encircling line are set to be just one circle of the outer cylindrical surface of the core, which is wrapped with the flexible slot I and the flexible scale plate, along with the bending of the spring steel sheet, so that the length direction of the scale at the moment can always keep consistent with the axial direction of the core, and when the angle gauge measures the alpha angle of the core structural surface, the position adjustment of the scale along the axial direction of the core can be reduced or omitted, and the position of the lowest point or the highest point of the current core structural surface (31) can be marked on the flexible scale plate by the scale automatically, so that the beta angle value can be conveniently and rapidly read according to the marked position;
the utility model discloses a protractor, including scale, protractor, the scale upper end is transparent material, scale upper end is provided with mark line (133) with protractor rotation center coincidence, the protractor passes through screw (15) and scale upper end rotatable coupling, be rectangular shape hole (134) in the hole that is used for installing the screw on the scale, the length direction in rectangular shape hole is unanimous with scale length direction for the position of protractor can follow scale length direction and remove.
2. The tool for measuring dip angle of directional drilling core according to claim 1, wherein the upper and lower circumferential lines each comprise a hard segment (100) and a soft segment (101), the hard segment being located at both ends for connecting the flexible slots and for substantially defining the longitudinal position of the scale, the soft segment being located in the middle for passing through the upper or lower through holes and for surrounding the core.
3. The tool for measuring the dip angle of an oriented drill core according to claim 1, wherein the scale is provided with a second scale mark for measuring the length or the distance, the core dip angle measuring assembly further comprises a soft silica gel wrapping layer wrapped outside the spring steel sheet, and the silica gel wrapping layer is provided with a third scale mark for measuring the circumferential length dimension of the core.
4. The tool of claim 1, wherein the length of the spring steel sheet is greater than or equal to the core outer cylinder circumference; the flexible scale plate is a transparent plastic sheet.
5. The tool of claim 1, further comprising a second transparent flexible slot (27) coupled to the first flexible slot for receiving the spring steel sheet therein, the second flexible slot being sized to mate with the spring steel sheet, a separation line (28) being provided between the first flexible slot and the second flexible slot, the second flexible slot having a second opening (271) through which the spring steel sheet can be received into the second flexible slot.
6. The tool for measuring the dip angle of the directional drilling core according to claim 5, wherein the upper end and the lower end of the flexible scale plate are respectively provided with a spring steel sheet (23), the spring steel sheet comprises a first spring steel sheet (231) and a second spring steel sheet (232) which are respectively positioned at the upper end and the lower end of the flexible scale plate, and correspondingly, the number of the separation lines is two, the second flexible slots are two which are distributed at the upper end and the lower end of the first flexible slot, and the second opening is two which are respectively communicated with the second flexible slots; and part or all scale marks of the flexible scale plate extend from one end connected with the first spring steel sheet to one end connected with the second spring steel sheet.
7. The tool of claim 6, wherein the connection of the upper hoop winding to the first flexible slot and the connection of the lower hoop winding to the first flexible slot are both on separate lines.
8. The tool for measuring the dip angle of a directional drilling core as set forth in claim 6, wherein the first and second flexible slots are made of plastic, and the parting line is a parting line formed by hot pressing.
CN201910507897.XA 2019-06-12 2019-06-12 Tool for measuring inclination angle of directional drilling core Active CN110095047B (en)

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CN112577468A (en) * 2020-12-09 2021-03-30 贵州盘江煤电集团技术研究院有限公司 Inclination angle measuring device for directional drilling core

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