CN116291394A - Shallow well soil layer stepped geothermal temperature measurement drilling device - Google Patents

Abstract

The invention provides a stepped geothermal temperature-measuring drilling device for shallow well soil layers, which includes a drilling tool and a multi-point temperature-measuring unit. The drilling tool has a drill head and a drill pipe. The multi-point temperature measurement unit, including the first sleeve, the second sleeve, the first temperature measurement component, the second temperature measurement component and the fixed temperature measurement component, is used for nesting each other and can be stretched to facilitate multi-point temperature measurement . The shallow well soil layer stepped geothermal temperature measuring drilling device provided by the present invention is equipped with a drilling tool to open temperature measuring shallow wells and open temperature measuring shallow wells of different depths. A multi-point temperature measurement unit is set up, through the first sleeve, the second sleeve, the first temperature measurement component, the second temperature measurement component and the fixed temperature measurement component, real-time temperature measurement can be carried out on different depths of soil layers in sections . The fixed temperature measurement component can control the multi-point temperature measurement unit to adapt to the depth of the temperature measurement shallow well for fixed temperature measurement, and measure the temperature of the soil layer to establish a ground temperature-depth change curve, which is very practical.

Description

Shallow well soil layer stepped geothermal temperature measurement drilling device

technical field

The invention belongs to the technical field of geothermal temperature measurement, and in particular relates to a stepped geothermal temperature measuring drilling device for shallow well soil layers.

Background technique

As a renewable energy, geothermal resources have the characteristics of large reserves, environmental protection and pollution-free, and high utilization coefficient. Compared with other clean energy sources, they have the advantages of wide distribution and good stability. At present, before the exploration and development of geothermal resources, key parameters such as formation temperature, geothermal gradient and earth heat flow value are generally obtained through geothermal shallow wells, so as to conduct resource evaluation and regional optimization of geothermal resources in the region. Formation temperature is a key parameter for geothermal development and an evaluation index for thermal reservoirs. Its measurement is a very important technical means for geothermal wells and is of great significance.

In the prior art, the commonly used temperature measurement method for geothermal wells usually uses a thermometer, but the thermometer needs to be lowered into the borehole for temperature measurement after the drill bit is stopped and taken out. The temperature obtained by this temperature measurement method The data will lag, and it is impossible to obtain real-time and accurate formation temperature values in real time, and there is a large error between the measured temperature and the actual temperature. In addition, this temperature measurement method generally obtains the formation temperature at the bottom of the well, and cannot continuously obtain real-time temperatures corresponding to different formation depths, which leads to inaccurate and poor practicability of the established ground temperature-depth change curves of formations at different depths.

Contents of the invention

The embodiment of the present invention provides a stepped geothermal temperature measuring drilling device for shallow well soil, aiming to solve the problem of poor practicability caused by the inaccurate geothermal-depth variation curves of strata at different depths established

In order to achieve the above object, the technical solution adopted by the present invention is to provide a stepped geothermal temperature measuring drilling device for shallow well soil, including:

a drilling tool having a drill head and a drill pipe portion; and

The multi-point temperature measurement unit includes a first sleeve, a second sleeve, a first temperature measurement assembly, a second temperature measurement assembly and a fixed temperature measurement assembly; the first sleeve is slidably set on the drill pipe part ; the second sleeve is slidingly sleeved on the first sleeve; the first temperature measuring assembly is arranged at the bottom of the first sleeve; the second temperature measuring assembly is arranged at the first sleeve The bottom end of the second sleeve; the fixed temperature measurement assembly is arranged on the top of the second sleeve, and the fixed temperature measurement assembly is used to extend the second sleeve after the second sleeve reaches the depth to be measured in the borehole. Carrying out temperature measurement to the side wall of the borehole, and fixing the position of the second sleeve;

Wherein, after the position of the second sleeve is fixed, the first sleeve moves down to the bottom end of the second sleeve along with the drill pipe part, and the second temperature measuring assembly is subjected to the first temperature measurement. After the action of the second sleeve, it extends to the side wall of the borehole for temperature measurement; after the position of the first sleeve is fixed, the drill pipe part moves downward, and the first temperature measuring component is subjected to the second sleeve After the action of the barrel, it extends to the side wall of the borehole for temperature measurement.

In a possible implementation manner, the fixed temperature measurement assembly includes a positioning seat, a ejection positioning rod, a second return spring, an air bag, and a third temperature measurement structure; the positioning seat is fixedly sleeved on the second sleeve On the cylinder, an annular cavity is provided in the positioning seat, and at least four sliding holes arranged radially along the second sleeve and communicating with the annular cavity are provided on the side wall of the positioning seat, A plurality of sliding holes are arranged at annular intervals along the axis of the second sleeve, and at least four third temperature-measuring chutes are provided on the positioning seat, and the plurality of third temperature-measuring chutes are arranged along the axis of the second sleeve. The axes of the second sleeve are arranged at annular intervals, and there are third via holes communicating with each of the third temperature measuring chutes; there are at least four ejection positioning rods, and each of the ejection positioning rods is connected to the Each of the sliding holes is provided in one-to-one correspondence, each of the ejection positioning rods is slidably disposed in the corresponding sliding hole, and each ejection positioning rod is provided with a limit cap at one end of the annular cavity There are at least four springs, each of which is set in one-to-one correspondence with each of the ejection positioning rods, and each of the springs is sleeved on the corresponding ejection positioning rod, and one end of the ejection positioning rod The inner wall of the annular cavity abuts, and the other end abuts against the limit cap; the airbag is arranged in the annular cavity, and is used to push each ejection positioning rod to slide after inflation; the third There are at least four temperature measuring structures, each of the third temperature measuring structures corresponds to each of the third temperature measuring chutes, and is used to protrude after the airbag is inflated and abut against the side wall of the borehole, To measure the temperature of the position where the positioning seat is located.

In a possible implementation manner, each of the third temperature measuring structures includes a third fixing plate, a third sliding rod, a third spring, and a third temperature measuring crank; the third fixing plate is fixed on the In the third temperature measuring chute, there is a third perforation on the third fixing plate; the third sliding rod is slidably arranged in the third perforation along the vertical direction, and the top end of the third sliding rod passes through After passing through the third via hole, it extends into the annular cavity and abuts against the airbag. The third sliding rod is fixed with a third stop collar, and the third stop collar The ring is located in the third temperature measuring chute; the third spring is sleeved on the third sliding rod, one end of the third spring is in contact with the third fixing plate, and the other end is in contact with the The third limit collar abuts; the third temperature measuring crank includes a vertical section hinged with the bottom end of the third slide bar and an inclined section integrally formed with the vertical section, and the vertical section is integrated with the vertical section. The included angle of the inclined section is 135°, and the end of the inclined section away from the vertical section is provided with a temperature sensor;

In a possible implementation manner, the bottom of the second sleeve is provided with a second temperature measuring chute, and the second temperature measuring chute is provided with at least four; the second temperature measuring assembly is provided with at least Four, each of the second temperature measuring components is arranged on the inner wall of the second sleeve at annular intervals along the axis of the second sleeve, and corresponds to each of the second temperature measuring chute; each of the first The second temperature measuring assembly includes a second fixed plate, a second slide rod, a second spring, and a second temperature measuring crank; the second fixed plate is fixed in the second temperature measuring chute, and the second fixed plate There is a second perforation on the top; the second sliding rod is slidably arranged in the second perforation along the vertical direction, and a second limiting collar is fixed on the second sliding rod, and the second limiting The collar is located in the second temperature measuring chute; the second spring is sleeved on the second sliding rod, one end of the second spring is in contact with the second fixing plate, and the other end is in contact with the second The second limit collar abuts; the second temperature measuring crank includes a vertical section hinged with the bottom end of the second slide bar and an inclined section integrally formed with the vertical section, and the vertical section The included angle with the inclined section is 135°, and the end of the inclined section away from the vertical section is provided with a temperature sensor;

Wherein, the top end of the first sleeve is provided with a plug-in limiting structure for pressing each of the second slide bars when the top end of the first sleeve moves down to the bottom end of the second sleeve.

In a possible implementation manner, at least four sliding cavities are provided in the top end sidewall of the first sleeve; The sliding cavities are set in one-to-one correspondence;

Each of the plug-in limiting structures includes a wedge-shaped plug, a compression spring, a wedge-shaped sliding column, and a first return spring; the wedge-shaped plugs are all slid in the sliding cavity along the vertical direction, and each Each of the wedge-shaped plug-in blocks is provided with a vertically extending downward plug-in post, and the plug-in post protrudes through the cavity of the slide hole, and the wedge-shaped plug-in block is also provided with a second plug-in post. a wedge-shaped surface; the compression spring is arranged in the sliding cavity, and is used for springing the wedge-shaped plug-in block to continuously maintain a tendency to move downward; the wedge-shaped sliding post is along the The radial slide is arranged on the first sleeve, and one end passes through the inner wall of the first sleeve and protrudes. The wedge-shaped sliding column is located at one end of the sliding cavity and is provided with the first wedge The second wedge-shaped surface adapted to the surface, and a limit block is provided; the first return spring is located in the sliding cavity, and is sleeved on the wedge-shaped sliding column, one end is in contact with the limit block, and the other end is in contact with the sliding The inner wall of the cavity is abutted to keep the wedge-shaped sliding column with a tendency to move into the sliding cavity;

Wherein, the drill pipe part is provided with a push ring corresponding to each of the wedge-shaped sliding columns, and is used to push each of the wedge-shaped sliding columns to move downward.

In a possible implementation manner, the shallow well soil stepped geothermal temperature measurement drilling device further includes an auxiliary casing, the auxiliary casing is rotatably arranged between the first sleeve and the drill pipe part, and the pushing ring fixed on the auxiliary casing.

In a possible implementation manner, the bottom of the first sleeve is provided with a first temperature measuring chute, and the first temperature measuring chute is provided with at least four; the first temperature measuring assembly is provided with at least Four, each of the first temperature-measuring components is arranged on the inner wall of the first sleeve at annular intervals along the axis of the first sleeve, and corresponds to each of the first temperature-measuring chute; each The first temperature measuring assembly includes a first fixing plate, a first sliding rod, a first spring, and a first temperature measuring crank; the first fixing plate is fixed in the first temperature measuring chute, and the first There is a first through hole on a fixed plate; the first sliding rod is slidably arranged in the first through hole along the vertical direction, and a first limiting collar is fixed on the first sliding rod; A limit collar is located in the first temperature measuring chute; the first spring is sleeved on the first sliding rod, one end of the first spring is in contact with the first fixing plate, and the other One end abuts against the first limit collar; the first temperature measuring crank includes a vertical section hinged to the bottom end of the first slide bar and an inclined section integrally formed with the vertical section, the The angle between the vertical section and the inclined section is 135°, and the end of the inclined section away from the vertical section is provided with a temperature sensor;

Wherein, the auxiliary sleeve is sleeved with a plug-in stop ring, and the plug-in stop ring is slidably connected with the auxiliary sleeve for moving down the push ring to the first sleeve. At the bottom end, each of the first sliding rods is pressed by the insertion limit ring.

In a possible implementation manner, at least four plug-in connecting rods are provided on the plug-in limiting ring, and the plurality of plug-in connecting rods correspond to each of the first temperature measuring chute one by one.

In this implementation, compared with the prior art, a drilling tool is provided to set up shallow temperature-measuring wells, and shallow temperature-measuring wells of different depths are set up; The cylinder, the first temperature measuring component, the second temperature measuring component and the fixed temperature measuring component can carry out real-time temperature measurement on soil layers of different depths in sections to ensure the accuracy of the measurement work, and at the same time, it can ensure the establishment of strata of different depths The accuracy of the ground temperature-depth change curve. In addition, different temperature measurement depths can be controlled by fixing the temperature measurement components, which can ensure the flexibility of temperature measurement.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of a planar connection structure of a stepped geothermal temperature measuring drilling device in a shallow well soil layer provided by an embodiment of the present invention that is not in a working state;

Fig. 2 is the enlarged schematic diagram of the shallow well soil layer stepped geothermal temperature measuring drilling device A provided in Fig. 1;

Fig. 3 is the enlarged schematic diagram of the shallow well soil layer stepped geothermal temperature measuring drilling device B provided in Fig. 1;

Fig. 4 is the enlarged schematic diagram of the shallow well soil layer stepped geothermal temperature measuring drilling device C provided in Fig. 1;

Fig. 5 is the enlarged structural schematic diagram of the stepped geothermal temperature measuring drilling device D in the shallow well soil layer provided in Fig. 1;

Fig. 6 is a schematic cross-sectional structural view of the planar connection structure of the step-type geothermal temperature measurement drilling device in the shallow well soil layer provided by the embodiment of the present invention in the working state;

Explanation of reference signs:

100. Drilling tool; 110. Drill head; 120. Drill pipe part; 121. Auxiliary casing; 1211. Push ring; 1212. Plug-in limit ring; 200. Multi-point temperature measurement unit; ; 211, the first temperature measuring chute; 220, the second sleeve; 221, the second temperature measuring chute; 222, the third temperature measuring chute; 230, the first temperature measuring component; 231, the first fixing plate; 232, the first slide bar; 233, the first spring; 234, the first temperature measuring crank; 240, the second temperature measuring assembly; 241, the second fixed plate; 242, the second slide bar; 243, the second spring; 244 , the second temperature measuring crank; 250, the fixed temperature measuring assembly; 251, the positioning seat; 252, the ejection positioning rod; 253, the second return spring; 254, the air bag; Plate; 2552, the third slide rod; 2553, the third spring; 2554, the third temperature measuring crank; 300, plug-in limit structure; 310, wedge-shaped plug-in block; 320, compression spring; 330, wedge-shaped sliding column; 340 , The first return spring.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Please refer to Fig. 1 to Fig. 6 together, and now the shallow well soil layer stepped geothermal temperature measuring drilling device provided by the present invention will be described. The shallow well soil step-type geothermal temperature measurement drilling device includes a drilling tool 100 with a drill head 110 and a drill pipe 120 . The multi-point temperature measurement unit 200 includes a first sleeve 210 , a second sleeve 220 , a first temperature measurement assembly 230 , a second temperature measurement assembly 240 and a fixed temperature measurement assembly 250 . The first sleeve 210 is slidably sleeved on the drill pipe part 120 . The second sleeve 220 is slidingly sleeved on the first sleeve 210 . The first temperature measuring component 230 is disposed at the bottom of the first sleeve 210 . The second temperature measuring component 240 is disposed at the bottom of the second sleeve 220 . The fixed temperature measurement assembly 250 is arranged on the top of the second sleeve 220, and the fixed temperature measurement assembly 250 is used to extend to the side wall of the borehole for temperature measurement after the second sleeve 220 reaches the depth to be measured in the borehole, and The position of the second sleeve 220 is fixed.

Wherein, after the position of the second sleeve 220 is fixed, the first sleeve 210 moves down to the bottom end of the second sleeve 220 along with the drill pipe part 120 , and the second temperature measuring assembly 240 is subjected to the action of the second sleeve 220 , extended to the side wall of the borehole for temperature measurement. After the position of the first sleeve 210 is fixed, the drill pipe part 120 moves downward, and the first temperature measuring assembly 230 is extended to the side wall of the borehole for temperature measurement after being affected by the second sleeve 220 .

Compared with the prior art, the step-type geothermal temperature measurement drilling device for shallow well soil layer provided in this embodiment is equipped with a drilling tool 100 to open temperature measurement shallow wells and open temperature measurement shallow wells with different depths. The multi-point temperature measurement unit 200 is set up, through the first sleeve 210, the second sleeve 220, the first temperature measurement assembly 230, the second temperature measurement assembly 240 and the fixed temperature measurement assembly 250, the soil of different depths can be segmented layer for real-time temperature measurement. The fixed temperature measurement unit 250 can control the multi-point temperature measurement unit 200 to adapt to the depth of the temperature measurement shallow well to perform fixed temperature measurement, and measure the temperature of the soil layer to establish a ground temperature-depth change curve, which has good practicability.

In some embodiments, the above-mentioned fixed temperature measurement component 250 may adopt the structure shown in FIG. 1 , FIG. 2 and FIG. 6 . Referring to FIG. 1 , FIG. 2 and FIG. 6 , the fixed temperature measurement assembly 250 includes a positioning seat 251 , an ejection positioning rod 252 , a second return spring 253 , an air bag 254 and a third temperature measurement structure 255 . The positioning seat 251 is fixedly sleeved on the second sleeve 220. The positioning seat 251 is provided with an annular cavity. A plurality of sliding holes are arranged at annular intervals along the axis of the second sleeve 220, and at least four third temperature measuring chute 222 are arranged on the positioning seat 251, and a plurality of third temperature measuring chute 222 is arranged along the The second sleeve 220 is disposed at an annular interval along the axis of the second sleeve 220 , and is provided with a third via hole communicating with each third temperature measuring chute 222 . Ejection positioning rod 252 is provided with at least four, and each ejection positioning rod 252 is provided with each sliding hole one by one, and each ejection positioning rod 252 is all slidably arranged in the corresponding sliding hole, and each ejection positioning rod 252 One end of the annular cavity is provided with a limiting cap. There are at least four springs, and each spring corresponds to each ejection positioning rod 252 one by one. Limit cap abutment. The air bag 254 is disposed in the annular cavity, and is used to push each ejection positioning rod 252 to slide after being inflated. There are at least four third temperature-measuring structures 255, and each third temperature-measuring structure 255 corresponds to each third temperature-measuring chute 222 one-to-one. To measure the temperature of the position where the positioning seat 251 is located.

The multi-point temperature measurement unit 200 is a telescopic structure, composed of a first sleeve 210 and a second sleeve 220, and performs three temperature measurement operations. The fixed temperature measuring assembly 250 is wound around the top of the second sleeve 220, and the positioning seat 251 is provided with an annular cavity. shaped slide hole. Each ejection positioning rod 252 is slidably arranged in each sliding hole, and each ejection positioning rod 252 is fixed with a limit cap for the second return spring 253 to contact and reset. The airbags 254 pass through the annular cavity in turn, abut against each ejection positioning rod 252 in turn, and are provided with a ventilation pipeline communicating with the airbags 254. When the ventilation pipeline is inflated into the airbags 254, the airbags 254 expand, and each ejection positioning The rod 252 fixes the second sleeve 220 on the well wall of the temperature-measuring shallow well to realize the fixation and subsequent temperature-measuring work. When the gas in the airbag 254 is extracted from the ventilation pipeline, the airbag 254 resets and releases and pushes out the positioning rod 252 to measure the temperature. The fixation of the warm well wall.

In some embodiments, the above-mentioned third temperature measuring structure 255 may adopt the structure shown in FIG. 1 , FIG. 2 and FIG. 6 . Referring to FIG. 1 , FIG. 2 and FIG. 6 , each third temperature measuring structure 255 includes a third fixing plate 2551 , a third sliding rod 2552 , a third spring 2553 and a third temperature measuring crank 2554 . The third fixing plate 2551 is fixed in the third temperature measuring chute 222 , and the third fixing plate 2551 has a third through hole. The third sliding rod 2552 is slid and installed in the third through hole along the vertical direction. The top end of the third sliding rod 2552 extends into the annular cavity after passing through the third through hole, and abuts against the airbag 254. The third sliding rod 2552 A third limiting collar is fixed on the rod 2552 , and the third limiting collar is located in the third temperature measuring chute 222 . The third spring 2553 is sheathed on the third sliding rod 2552 , one end of the third spring 2553 abuts against the third fixing plate 2551 , and the other end abuts against the third limiting collar. The third temperature measuring crank 2554 includes a vertical section hinged with the bottom end of the third slide bar 2552 and an inclined section integrally formed with the vertical section. The angle between the vertical section and the inclined section is 135°, and the inclined section is far away from the vertical section. The end is provided with a temperature sensor.

Wherein, the third temperature measuring chute 222 has a vertical section and an inclined section, the vertical section is arranged vertically, and the inclined section is inclined along the radial direction of the second sleeve 220 from inside to outside, and the included angle is 135°.

The third temperature measuring structure 255 is the first temperature measuring point of the multi-point temperature measuring unit 200 , and when the fixed temperature measuring component 250 is fixed, the temperature of the soil layer at the fixed point is measured simultaneously. There are at least four third temperature measuring chute 222 provided on the positioning seat 251, and each third temperature measuring chute 222 is provided with a third via hole communicating with each positioning seat 251, which can be used for the third temperature measuring structure 255 Moving downward along the third temperature measuring chute 222 on the second sleeve 220 to detect temperature. The third fixing plate 2551 is an annular plate, and the through hole on the annular plate is the third through hole, which is arranged in the third temperature measuring chute 222, and the third temperature measuring chute 222 is divided into two sliding cavities. The slide bar 2552 is provided with a third limit collar, and the end of the third slide bar 2552 above the third limit collar extends into the annular cavity through the third via hole, abuts against the airbag 254, and the third The end of the third sliding rod 2552 below the limit collar passes through the third hole and is hinged on the third temperature measuring crank 2554. When the air bag 254 is inflated, the third sliding rod 2552 is pushed down to move down along the third The temperature measuring chute 222 pushes out the third temperature measuring crank 2554 . The third spring 2553 is sheathed on the third sliding rod 2552 and can reset the third temperature measuring structure 255 after the air bag 254 removes the internal gas. The third temperature measuring chute 222 has a vertical section and an inclined section, the inclined section is inclined along the radial direction of the second sleeve 220 from the inside to the outside, and the included angle is 135°. The corresponding third temperature measuring crank 2554 also includes a vertical section and an inclined section, the angle between the vertical section and the inclined section is 135°, and the end of the inclined section away from the vertical section is provided with a temperature sensor.

In some embodiments, the above-mentioned second sleeve 220 may adopt the structure shown in FIG. 1 , FIG. 3 and FIG. 6 . Referring to FIG. 1 , FIG. 3 and FIG. 6 , the bottom of the second sleeve 220 is provided with a second temperature measuring chute 221 , and at least four of the second temperature measuring chute 221 are provided. There are at least four second temperature measuring components 240, and each second temperature measuring component 240 is arranged on the inner wall of the second sleeve 220 at annular intervals along the axis of the second sleeve 220, and is connected to each second temperature measuring chute 221 one by one. correspond. Each second temperature measuring assembly 240 includes a second fixing plate 241 , a second sliding rod 242 , a second spring 243 and a second temperature measuring crank 244 . The second fixing plate 241 is fixed in the second temperature measuring chute 221 , and has a second through hole on the second fixing plate 241 . The second sliding rod 242 is slidably disposed in the second through hole along the vertical direction, and a second limiting collar is fixed on the second sliding bar 242 , and the second limiting collar is located in the second temperature measuring chute 221 . The second spring 243 is sleeved on the second sliding rod 242 , one end of the second spring 243 abuts against the second fixing plate 241 , and the other end abuts against the second limiting collar. The second temperature measuring crank 244 includes a vertical section hinged to the bottom of the second slide bar 242 and an inclined section integrally formed with the vertical section. The angle between the vertical section and the inclined section is 135°, and the inclined section is far away from the vertical section. The end is provided with a temperature sensor.

Wherein, the second temperature measuring chute 221 has a vertical section and an inclined section, the vertical section is arranged vertically, and the inclined section is inclined along the radial direction of the second sleeve 220 from inside to outside, and the included angle is 135°.

Wherein, the top end of the first sleeve 210 is provided with a plug-in limiting structure 300 for pressing each second sliding rod 242 when the top end of the first sleeve 210 moves down to the bottom end of the second sleeve 220 .

The second temperature measurement structure is the second temperature measurement point of the multi-point temperature measurement unit 200. After the fixed temperature measurement component 250 is fixed for a while, the second temperature measurement structure is driven by the plug-in limit structure 300 at the top of the first sleeve 210 Measure the temperature of the soil layer at its fixed position. At least four second temperature-measuring slide grooves 221 are provided at the bottom end of the second sleeve 220 . The second fixing plate 241 is an annular plate, and the through hole on the annular plate is the second perforation, which is arranged in the second temperature measuring chute 221, and the second temperature measuring chute 221 is divided into two sliding cavities. The slide bar 242 is provided with a second limit collar, the second limit collar abuts against the bottom of the upper sliding cavity of the second perforation, and the end of the second slide bar 242 below the second limit collar passes through The second through hole is hinged on the second temperature measuring crank 244. When the plug-in limit structure 300 at the top of the first sleeve 210 is plugged into the second temperature measuring chute 221, the second sliding rod 242 is pushed to move downward. , eject the second temperature measuring crank 244 along the second temperature measuring chute 221 . The second spring 243 is sheathed on the second sliding rod 242 , and can reset the second temperature measuring structure when the insertion limiting structure 300 is separated from the second temperature measuring chute 221 . The second temperature measuring chute 221 has a vertical section and an inclined section, the inclined section is inclined along the radial direction of the second sleeve 220 from inside to outside, and the included angle of the inclination is 135°. The corresponding second temperature measuring crank 244 also includes a vertical section and an inclined section, the angle between the vertical section and the inclined section is 135°, and the end of the inclined section away from the vertical section is provided with a temperature sensor.

In some embodiments, the above-mentioned first sleeve 210 may adopt the structure shown in FIG. 1 , FIG. 5 and FIG. 6 . Referring to FIG. 1 , FIG. 5 and FIG. 6 , at least four sliding cavities are provided in the top side wall of the first sleeve 210 . There are at least four plug-in structures, and each plug-in structure is provided in one-to-one correspondence with each sliding cavity.

Each insertion limiting structure 300 includes a wedge-shaped plug-in block 310 , a compression spring 320 , a wedge-shaped sliding column 330 and a first return spring 340 . The wedge-shaped plug-in blocks 310 are all slidably arranged in the sliding cavity along the vertical direction, and each wedge-shaped plug-in block 310 is provided with a plug-in column protruding vertically downward, and the plug-in post passes through the cavity of the sliding hole After protruding out, the wedge-shaped inserting block 310 is also provided with a first wedge-shaped surface. The compression spring 320 is disposed in the sliding cavity, and is used for springing the wedge-shaped plugging block 310 to continuously maintain a tendency to move downward. The wedge-shaped sliding post 330 is slidably arranged on the first sleeve 210 along the radial direction of the first sleeve 210, and one end passes through the inner wall of the first sleeve 210 and protrudes, and the wedge-shaped sliding post 330 is located at one end of the sliding cavity. There is a second wedge-shaped surface adapted to the first wedge-shaped surface, and a limit block is provided. The first return spring 340 is located in the sliding cavity, and is sheathed on the wedge-shaped sliding column 330. One end abuts against the limit block, and the other end abuts against the inner wall of the sliding cavity, so as to keep the wedge-shaped sliding column 330 continuously Tendency to move into sliding cavity.

Wherein, the drill rod part 120 is provided with a push ring 1211 corresponding to each wedge-shaped sliding column 330 for pushing each wedge-shaped sliding column 330 to move downward.

The insertion limit structure 300 can limit the push ring 1211 on the drill pipe part 120, so that it cannot move down to the first set of temperature measuring chute 222 before the insertion limit structure 300 enters the third temperature measuring chute 222. The bottom end of the barrel 210. The slide cavity is provided with a chute for the sliding of the insertion column, so that the insertion column can only move along the axis of the slide hole. A fixed wedge-shaped surface is provided on the protruding end of the plug-in post toward the inner wall of the first sleeve 210 . The first wedge-shaped surface of the wedge-shaped plug-in block 310 is slidably arranged with the second wedge-shaped surface of the plug-in post. When the wedge-shaped plug-in block 310 moves upward, the plug-in post moves into the sliding cavity, and the fixed wedge-shaped surface releases the pushing ring. The fixing of 1211 makes the drill pipe part 120 continue to move downward.

In some embodiments, the aforementioned auxiliary sleeve 121 may adopt the structure shown in FIG. 1 and FIG. 6 . Referring to Fig. 1 and Fig. 6, the drill pipe part 120 also includes an auxiliary sleeve 121, the auxiliary sleeve 121 is rotatably arranged between the first sleeve 210 and the drill pipe part 120, and the push ring 1211 is fixed on the auxiliary sleeve 121 . A thrust bearing is provided between the auxiliary sleeve 121 and the drill pipe part 120 to keep them moving synchronously.

In some embodiments, the above-mentioned first sleeve 210 may adopt the structure shown in FIG. 1 , FIG. 4 and FIG. 6 . Referring to FIG. 1 , FIG. 4 and FIG. 6 , the bottom of the first sleeve 210 is provided with a first temperature measuring chute 211 , and at least four of the first temperature measuring chute 211 are provided. There are at least four first temperature measuring components 230, and each first temperature measuring component 230 is arranged on the inner wall of the first sleeve 210 at annular intervals along the axis of the first sleeve 210, and is connected with each first temperature measuring chute 211 One to one correspondence. Each first temperature measuring assembly 230 includes a first fixing plate 231 , a first sliding rod 232 , a first spring 233 and a first temperature measuring crank 234 . The first fixing plate 231 is fixed in the first temperature measuring chute 211 , and the first fixing plate 231 has a first through hole. The first sliding rod 232 is slidably disposed in the first through hole along the vertical direction, and a first limiting collar is fixed on the first sliding bar 232 , and the first limiting collar is located in the first temperature measuring chute 211 . The first spring 233 is sheathed on the first sliding rod 232 , one end of the first spring 233 abuts against the first fixing plate 231 , and the other end abuts against the first limiting collar. The first temperature measuring crank 234 includes a vertical section hinged to the bottom of the first slide bar 232 and an inclined section integrally formed with the vertical section. The angle between the vertical section and the inclined section is 135°, and the inclined section is far away from the vertical section. The end is provided with a temperature sensor.

Wherein, the first temperature measuring chute 211 has a vertical section and an inclined section, the vertical section is arranged vertically, and the inclined section is inclined along the radial direction from the inside to the outside of the first sleeve 210, and the included angle is 135°.

Wherein, the auxiliary sleeve 121 is sleeved with a plug-in stop ring 1212 , and the plug-in stop ring 1212 is slidably connected with the auxiliary sleeve 121 for passing through when the push ring 1211 moves down to the bottom of the first sleeve 210 . The insertion limit ring 1212 presses each first slide bar 232 .

The first temperature measurement structure is the third temperature measurement point of the multi-point temperature measurement unit 200. After the fixed temperature measurement component 250 is fixed for a while, the first temperature measurement structure is driven to the soil layer at the fixed position by inserting the limit ring 1212 Take a temperature measurement. There are at least four first temperature measuring slides 211 provided at the bottom end of the first sleeve 210 . The first fixing plate 231 is an annular plate, and the through hole on the annular plate is the first through hole, which is arranged in the first temperature measuring chute 211, and divides the first temperature measuring chute 211 into two sliding cavities. The slide bar 232 is provided with a first limit collar, the first limit collar abuts against the bottom of the upper sliding cavity of the first perforation, and the end of the first slide bar 232 below the first limit collar passes through The first perforation is hinged on the first temperature measuring crank 234. When the push ring 1211 on the auxiliary sleeve 121 pushes the insertion limit ring 1212 into the first temperature measuring chute 211, pushes the first sliding rod 232 Moving down, the first temperature measuring crank 234 is pushed out along the first temperature measuring chute 211 . The first spring 233 is sheathed on the first sliding rod 232 , and can reset the first temperature measuring structure when the push ring 1211 on the auxiliary sleeve 121 is separated from the first temperature measuring chute 211 . The first temperature measuring chute 211 has a vertical section and an inclined section, the inclined section is inclined along the radial direction of the first sleeve 210 from inside to outside, and the included angle of the inclination is 135°. The corresponding second temperature measuring crank 244 also includes a vertical section and an inclined section, the angle between the vertical section and the inclined section is 135°, and the end of the inclined section away from the vertical section is provided with a temperature sensor.

In some embodiments, the above-mentioned plug-in limiting ring 1212 may adopt the structure shown in FIG. 1 and FIG. 6 . Referring to FIG. 1 and FIG. 6 , at least four plug-in connecting rods are provided on the plug-in limiting ring 1212 , and the plurality of plug-in connecting rods correspond to each first temperature measuring chute 211 one by one. Each plug-in connecting rod pushes the first sliding rod 232 in each first temperature measuring chute 211 to move downward, so that each first temperature measuring crank 234 realizes temperature measurement.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention. Inside.

Claims (8)

1. The shallow well soil layer stepped geothermal temperature measuring drilling device is characterized in that it includes: a drilling tool having a drill head and a drill pipe portion; and The multi-point temperature measurement unit includes a first sleeve, a second sleeve, a first temperature measurement assembly, a second temperature measurement assembly and a fixed temperature measurement assembly; the first sleeve is slidably set on the drill pipe part ; the second sleeve is slidingly sleeved on the first sleeve; the first temperature measuring assembly is arranged at the bottom of the first sleeve; the second temperature measuring assembly is arranged at the first sleeve The bottom end of the second sleeve; the fixed temperature measurement assembly is arranged on the top of the second sleeve, and the fixed temperature measurement assembly is used to extend the second sleeve after the second sleeve reaches the depth to be measured in the borehole. Carrying out temperature measurement to the side wall of the borehole, and fixing the position of the second sleeve; Wherein, after the position of the second sleeve is fixed, the first sleeve moves down to the bottom end of the second sleeve along with the drill pipe part, and the second temperature measuring assembly is subjected to the first temperature measurement. After the action of the second sleeve, it extends to the side wall of the borehole for temperature measurement; after the position of the first sleeve is fixed, the drill pipe part moves downward, and the first temperature measuring component is subjected to the second sleeve After the action of the barrel, it extends to the side wall of the borehole for temperature measurement. 2. The shallow well soil layer stepped geothermal temperature measurement drilling device according to claim 1, wherein the fixed temperature measurement assembly includes a positioning seat, a ejection positioning rod, a second return spring, an air bag, and a third measuring device. temperature structure; the positioning seat is fixedly sleeved on the second sleeve, the positioning seat is provided with an annular cavity, and the side wall of the positioning seat is provided with at least four Sliding holes arranged radially on the sleeve and communicating with the annular cavity, a plurality of sliding holes are arranged at intervals along the axis of the second sleeve, and at least four third temperature measuring A chute, a plurality of third temperature measuring chutes are arranged at annular intervals along the axis of the second sleeve, and a third via hole communicating with each of the third temperature measuring chutes is provided; the ejector There are at least four positioning rods, each of the ejection positioning rods is set in one-to-one correspondence with each of the sliding holes, each of the ejection positioning rods is slidably arranged in the corresponding sliding hole, each of the The ejection positioning rod is located at one end of the annular cavity and is provided with a limit cap; the springs are provided with at least four, each of the springs is set in one-to-one correspondence with each of the ejection positioning rods, and each of the springs is set It is provided on the corresponding ejection positioning rod, and one end abuts against the inner wall of the annular cavity, and the other end abuts against the limit cap; the air bag is arranged in the annular cavity for After inflating, push each of the ejector positioning rods to slide; there are at least four third temperature measuring structures, and each of the third temperature measuring structures corresponds to each of the third temperature measuring chutes one by one, for After the air bag is inflated, it protrudes and abuts against the side wall of the borehole, so as to measure the temperature of the position of the positioning seat. 3. The shallow well soil layer stepped geothermal temperature measurement drilling device according to claim 2, wherein each of the third temperature measurement structures comprises a third fixed plate, a third slide rod, a third spring and a first Three temperature-measuring cranks; the third fixing plate is fixed in the third temperature-measuring chute, and the third fixing plate has a third perforation; the third sliding rod is slid and arranged in the vertical direction In the third through hole, the top end of the third sliding rod extends into the annular cavity after passing through the third through hole, and abuts against the air bag, and the third sliding rod is fixed on A third limit collar is provided, and the third limit collar is located in the third temperature measuring chute; the third spring is sleeved on the third slide rod, and the third spring One end is in contact with the third fixing plate, and the other end is in contact with the third limit collar; the third temperature measuring crank includes a vertical section hinged to the bottom end of the third slide bar and connected to the The vertical section is an integrally formed inclined section, the angle between the vertical section and the inclined section is 135°, and the end of the inclined section away from the vertical section is provided with a temperature sensor. 4. The shallow well soil layer stepped geothermal temperature-measuring drilling device as claimed in claim 3, characterized in that, the bottom of the second sleeve is provided with a second temperature-measuring chute, and the second temperature-measuring chute There are at least four; the second temperature measuring components are at least four, and each of the second temperature measuring components is arranged on the inner wall of the second sleeve at annular intervals along the axis of the second sleeve, and is connected with each The second temperature measuring chute corresponds one by one; each of the second temperature measuring components includes a second fixing plate, a second slide bar, a second spring and a second temperature measuring crank; the second fixing plate is fixed on In the second temperature measuring chute, there is a second perforation on the second fixing plate; the second sliding rod is slidably arranged in the second perforation along the vertical direction, and the second sliding rod is A second limiting collar is fixed, and the second limiting collar is located in the second temperature measuring chute; the second spring is sleeved on the second sliding rod, and the second spring One end of one end abuts against the second fixing plate, and the other end abuts against the second limit collar; the second temperature measuring crank includes a vertical section hinged to the bottom end of the second slide bar and connected to The vertical section is an integrally formed inclined section, the angle between the vertical section and the inclined section is 135°, and the end of the inclined section away from the vertical section is provided with a temperature sensor; Wherein, the top end of the first sleeve is provided with a plug-in limiting structure for pressing each of the second slide bars when the top end of the first sleeve moves down to the bottom end of the second sleeve. 5. The shallow well soil layer stepped geothermal temperature measurement drilling device according to claim 4, wherein at least four sliding cavities are arranged in the top side wall of the first sleeve; the plug-in structure There are at least four, and each of the plug-in structures is set in one-to-one correspondence with each of the sliding cavities; Each of the plug-in limiting structures includes a wedge-shaped plug, a compression spring, a wedge-shaped sliding column, and a first return spring; the wedge-shaped plugs are all slid in the sliding cavity along the vertical direction, and each Each of the wedge-shaped plug-in blocks is provided with a vertically extending downward plug-in post, and the plug-in post protrudes through the cavity of the slide hole, and the wedge-shaped plug-in block is also provided with a second plug-in post. a wedge-shaped surface; the compression spring is arranged in the sliding cavity, and is used for springing the wedge-shaped plug-in block to continuously maintain a tendency to move downward; the wedge-shaped sliding post is along the The radial slide is arranged on the first sleeve, and one end passes through the inner wall of the first sleeve and protrudes. The wedge-shaped sliding column is located at one end of the sliding cavity and is provided with the first wedge The second wedge-shaped surface adapted to the surface, and a limit block is provided; the first return spring is located in the sliding cavity, and is sleeved on the wedge-shaped sliding column, one end is in contact with the limit block, and the other end is in contact with the sliding The inner wall of the cavity is abutted to keep the wedge-shaped sliding column with a tendency to move into the sliding cavity; Wherein, the drill pipe part is provided with a push ring corresponding to each of the wedge-shaped sliding columns, and is used to push each of the wedge-shaped sliding columns to move downward. 6. The shallow well soil step-type geothermal temperature measuring drilling device according to claim 5, wherein the drill pipe part also includes an auxiliary casing, and the auxiliary casing is rotatably arranged on the first sleeve and the drill pipe part Between, the said is fixed on the auxiliary casing. 7. The shallow well soil layer stepped geothermal temperature-measuring drilling device according to claim 6, wherein the bottom of the first sleeve is provided with a first temperature-measuring chute, and the first temperature-measuring chute There are at least four; there are at least four first temperature measuring components, and each of the first temperature measuring components is arranged on the inner wall of the first sleeve at annular intervals along the axis of the first sleeve, and One-to-one correspondence with each of the first temperature measuring chute; each of the first temperature measuring components includes a first fixing plate, a first slide rod, a first spring and a first temperature measuring crank; the first fixing plate Fixed in the first temperature measuring chute, the first fixing plate has a first through hole; the first slide bar is slid in the first through hole along the vertical direction, the first A first limit collar is fixed on the slide bar, and the first limit collar is located in the first temperature measuring chute; the first spring is sleeved on the first slide bar, and the One end of the first spring abuts against the first fixing plate, and the other end abuts against the first limit collar; the first temperature measuring crank includes a vertical section and an inclined section integrally formed with the vertical section, the angle between the vertical section and the inclined section is 135°, and the end of the inclined section away from the vertical section is provided with a temperature sensor; Wherein, the auxiliary sleeve is sleeved with a plug-in stop ring, and the plug-in stop ring is slidably connected with the auxiliary sleeve for moving down the push ring to the first sleeve. At the bottom end, each of the first sliding rods is pressed by the insertion limit ring. 8. The shallow well soil layer stepped geothermal temperature measuring drilling device according to claim 6, wherein at least four plug-in connecting rods are arranged on the plug-in limiting ring, and a plurality of the plug-in connections The rods are in one-to-one correspondence with each of the first temperature measuring chutes.

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