Equipment for measuring permeability in well drilling and logging field
By introducing buffer layer and clamping arm assembly into the drilling and logging equipment, the problem of core damage during clamping is solved, achieving uniform pressure protection of cores and accuracy of measurement results.
Patent Information
- Application Number
- CN202510512742.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2025-07-08
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing drilling and logging equipment lacks protection when clamping the core, resulting in core damage.
A device for drilling and logging on site is designed, using buffer layer and clamping arm assembly, applying uniform pressure to the core through the buffer layer to protect the core integrity, and precise control of the clamping arm through the drive assembly.
It effectively reduces local high-pressure damage to the core during clamping, protects the core integrity, and improves the accuracy of measurement results and the applicability of equipment.
Smart Images
Figure CN120273705A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of drilling detection, and particularly to an apparatus for on-site determination of permeability in drilling logging. Background Art
[0002] During the process of drilling logging, the apparatus for on-site determination of rock permeability is usually called a formation tester. Such apparatus mainly indirectly evaluates the permeability of rocks by measuring the flow characteristics of formation fluids, and its permeability is mainly calculated using Darcy's law. Darcy's law states that under laminar flow conditions, the velocity of fluid passing through a rock is proportional to the applied pressure difference, inversely proportional to the viscosity and length of the rock, and directly related to the permeability of the rock.
[0003] In the prior art, when detecting the permeability of a core, the core usually needs to be clamped. Some existing clamping apparatuses usually directly clamp the core sample with clamping instruments, lacking protection or buffering for the core, so that the core may be damaged due to excessive clamping force.
[0004] In summary, how to solve the problem that some clamping instruments lacking protection for the core in the prior art may cause damage to the core has become a difficult problem urgently needed to be solved in the current field. Therefore, it is necessary to propose an apparatus for on-site determination of permeability in drilling logging. Summary of the Invention
[0005] To solve the above problems, the present invention provides an apparatus for on-site determination of permeability in drilling logging. By providing a buffer layer, when the clamping arm exerts pressure, the buffer layer will apply uniform pressure to the core, which can effectively reduce the damage of the core caused by local high-pressure points during the clamping process, thereby protecting the integrity of the core.
[0006] To achieve the above object, the technical solution of the present invention is as follows: An apparatus for on-site determination of permeability in drilling logging includes a detection cylinder and a base, the base is fixedly connected to the inner bottom wall of the detection cylinder; an opening is provided at the top of the detection cylinder, and a cover plate is hinged at the opening. It further includes a detection system for detecting the permeability of the core, and a clamping assembly for clamping the core is provided on the base.
[0007] The clamping assembly includes a moving block, a buffer layer for wrapping the core, and a plurality of "L"-shaped clamping arms. A clamping groove is provided along the circumferential direction of the moving block; the transverse ends of the clamping arms all extend into the clamping groove and are fixedly connected with clamping blocks, and the middle parts of the transverse ends of the clamping arms are all hinged to the inner side wall of the base; the vertical ends of the clamping arms all extend outside the base and are fixedly connected with sleeves, and one side of the sleeves away from the clamping arms is in contact with the buffer layer.
[0008] A driving assembly for driving the vertical movement of the moving block and a cleaning assembly for cleaning the core are further provided inside the base.
[0009] A drying component for drying the core is provided inside the buffer layer.
[0010] An adjusting component for adjusting the clamping force of the clamping arm is provided inside the sleeve.
[0011] The technical principle of the above solution is as follows:
[0012] The driving component drives the moving block to move vertically. Since a clamping groove is formed in the circumferential direction of the moving block, a clamping block is provided in the clamping groove, the clamping block is fixedly connected to the clamping arm, and the clamping arm is hinged to the base, the clamping arm can be driven to clamp and release during the vertical movement of the moving block. Since the vertical end of the clamping arm is fixedly connected to the sleeve, and the other side of the sleeve contacts the buffer layer, the buffer layer can be squeezed or released by the clamping arm. When squeezed, the core is clamped by the buffer layer. The cleaning component can be used to clean the core, and the drying component can dry the cleaned core. The adjusting component can effectively adjust the clamping force of the clamping arm.
[0013] The following beneficial effects can be obtained by adopting the above solution:
[0014] 1. In the present invention, the driving component drives the moving block to move vertically, realizing the rapid clamping and release of the clamping arm, ensuring the accuracy and controllability of the clamping process, avoiding over-compression or insufficient clamping, thereby protecting the core sample from damage and ensuring the accuracy of the measurement results.
[0015] 2. In the present invention, by providing a buffer layer, when the clamping arm is squeezed, the buffer layer will apply a uniform pressure to the core, which can effectively reduce the damage of the core caused by local high-pressure points during the clamping process, thereby protecting the integrity of the core and being applicable to brittle rock samples.
[0016] 3. In the present invention, the cleaning component is used to clean the surface of the core before detection to remove impurities and pollutants, and the drying component is used to quickly dry the core sample after cleaning, thereby further improving the accuracy of the test results.
[0017] Furthermore, the driving component includes a lead screw, a nut seat, a controller and a rotating member. The controller is used to control the rotating member to rotate. The rotating member is fixedly connected to the inner bottom wall of the base, and the output shaft of the rotating member is coaxially fixedly connected to the lead screw. The top end of the lead screw penetrates through the moving block and is in threaded cooperation with the nut seat. The nut seat is located on the top of the moving block. A first spring is fixedly connected to the bottom of the moving block, and the bottom end of the first spring is fixedly connected to the rotating member.
[0018] Beneficial effects: By driving the screw rod to rotate through the rotating part, since the nut seat is in threaded engagement with the screw rod and the nut seat is located on top of the moving block, the rotation of the screw rod can drive the nut seat to move. When the nut seat moves downward, it can drive the moving block to move downward. Since the bottom of the moving block is fixedly connected to the first spring and the other end of the first spring is fixedly connected to the rotating part, when the nut seat moves upward, the moving block will be pushed up by the first spring and thus move upward, achieving the adjustment of the vertical position of the moving block in this way.
[0019] Furthermore, the cleaning assembly includes a cleaning chamber located inside the base; an annular piston is slidably engaged with the inner side wall of the cleaning chamber, and a piston rod is fixedly connected to the bottom of the moving block along its circumferential direction, and the bottom ends of the piston rods are all fixedly connected to the annular piston; the bottom of the cleaning chamber is communicated with an input pipe and an output pipe, and one-way valves are communicated at the joints of the input pipe and the output pipe with the cleaning chamber; the end of the input pipe away from the cleaning chamber is communicated with a liquid storage bucket, and the end of the output pipe away from the cleaning chamber is communicated with the side of the buffer layer away from the sleeve.
[0020] Beneficial effects: Since an annular piston is slidably engaged inside the cleaning chamber, the annular piston is fixedly connected to the piston rod, and the piston rod is fixedly connected to the moving block; so during the reciprocating movement of the moving block, the annular piston can be driven to reciprocate through the piston rod, and the reciprocating movement of the annular piston generates suction or thrust. Since the cleaning chamber is communicated with an input pipe and an output pipe, the input pipe is communicated with a liquid storage bucket, and the output pipe is communicated with the side of the buffer layer away from the sleeve, so when the moving block drives the clamping arm to clamp, the annular piston can be driven to push downward by the piston rod to generate thrust, and the liquid inside the cleaning chamber can be conveyed to the core, and the surface of the core can be cleaned by using the liquid.
[0021] Furthermore, the drying assembly includes an inflating member, and the controller is used to control the inflating member to inflate; a cavity is formed inside the buffer layer, the output end of the inflating member is communicated with the cavity, and a plurality of ventilation holes are formed along the circumferential direction on the side wall of the buffer layer away from the sleeve.
[0022] Beneficial effects: Since a plurality of ventilation holes are formed on the side wall of the buffer layer away from the sleeve, and the output end of the inflating member is communicated with the cavity inside the buffer layer, the inside of the buffer layer can be inflated through the inflating member. After inflation is completed, during the process of the clamping arm clamping the buffer layer, the buffer layer can be squeezed, and when squeezing, the gas inside the buffer layer is extruded to the side of the buffer layer away from the sleeve, thereby drying the core by using the air flow.
[0023] Furthermore, the adjusting assembly includes a top block, a second spring, a magnetic attraction block and a plurality of electromagnets, and the controller is used to control the opening and closing of the electromagnets; one end of the second spring is fixedly connected to the inner side wall of the sleeve, and the other end of the second spring is fixedly connected to the top block; the electromagnets are all embedded and installed on the inner bottom wall of the sleeve, the magnetic attraction block is embedded and installed at the bottom of the top block, and the electromagnets are all magnetically connected to the magnetic attraction block.
[0024] Beneficial effects: Since both ends of the second spring are fixedly connected to the top block and the inner side wall of the sleeve respectively, a magnetic attraction block is embedded at the bottom of the top block, and the electromagnets are all embedded in the inner bottom wall of the sleeve; therefore, the top block can be adjusted to different positions by controlling the magnetic attraction on and off between the electromagnet and the magnetic attraction block. During the process of the gas inside the buffer layer being extruded, the volume of the buffer layer gradually becomes smaller. By extending the top block to the outside of the sleeve, the clamping force of the clamping arm is further increased, reducing the possibility of clamping failure due to the reduction of the buffer layer volume.
[0025] Furthermore, several arc-shaped probes are provided inside the detection cylinder, and the controller is used to control the arc-shaped probes to apply pressure to the core.
[0026] Beneficial effects: By applying pressure to the core through the arc-shaped probes and being able to adjust the magnitude of the pressure, the test requirements under different pressure environments can be simulated.
[0027] Furthermore, several pressure sensors are also provided inside the detection cylinder, and the controller is used to receive and store the pressure information sent by the pressure sensors.
[0028] Beneficial effects: By obtaining the pressure information at different positions through the pressure sensors, the pressure changes at different positions of the core can be obtained, so as to realize the subsequent calculation of the core permeability.
[0029] Furthermore, several telescopic members are fixedly connected to the inner wall of the detection cylinder, and the output shafts of the telescopic members are fixedly connected to the arc-shaped probes and the pressure sensors respectively, and the controller is used to control the telescopic members to expand and contract.
[0030] Beneficial effects: Through the design of the telescopic members, both the arc-shaped probes and the pressure sensors can be attached to the surface of the core, so as to realize the detection of data.
[0031] Furthermore, a groove is formed at the top of the moving block, and the nut seat is located above the groove.
[0032] Beneficial effects: Through the design of the groove, an installation position can be provided for the nut seat, making the movement trajectory of the moving block stable.
[0033] Furthermore, the detection system includes the following modules:
[0034] The data acquisition module is used to obtain the key parameters related to the core permeability. The key parameters include gas pressure change, gas flow rate, gas viscosity, core length, and core cross-sectional size; and transmit the collected key parameters to the calculation module.
[0035] The calculation module is used to receive the key parameters sent by the data acquisition module, calculate the permeability of the core based on the key parameters, and output the permeability calculation result.
[0036] An interaction module for providing the display of the calculated permeability results.
[0037] Advantageous effects: By obtaining the key parameters related to the core permeability and calculating the core permeability for the key parameters, an automated operation mode can reduce manual intervention and operation steps, thereby improving the detection efficiency.
[0038] The additional aspects and advantages of the present invention will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present invention. Description of the Drawings
[0039] Figure 1 A cross-sectional view of the device for on-site determination of permeability in well logging of the present invention.
[0040] Figure 2 An axonometric view of the clamping assembly in the device for on-site determination of permeability in well logging of the present invention.
[0041] Figure 3 A cross-sectional view of the adjusting assembly in the device for on-site determination of permeability in well logging of the present invention.
[0042] Figure 4 A structural block diagram of the detection system in the device for on-site determination of permeability in well logging of the present invention.
[0043] The reference numerals in the drawings of the specification include: 1, detection cylinder; 2, base; 3, moving block; 4, buffer layer; 5, clamping arm; 6, clamping block; 7, sleeve; 8, lead screw; 9, nut seat; 10, motor; 11, first spring; 12, cleaning chamber; 13, annular piston; 14, piston rod; 15, top block; 16, second spring; 17, magnetic attraction block; 18, electromagnet; 19, arc-shaped probe; 20, electric push rod. Detailed Description of the Specific Embodiments
[0044] The following is a further detailed description through specific embodiments:
[0045] Embodiment 1:
[0046] As shown in the attached Figures 1 - 3 figures: A device for on-site determination of permeability in well logging includes a detection cylinder 1 and a base 2, and the base 2 is bolted and fixedly connected to the inner bottom wall of the detection cylinder 1; an opening is provided at the top of the detection cylinder 1, and a cover plate is hinged at the opening. It also includes a detection system for detecting the core permeability, and a clamping assembly for clamping the core is provided on the base 2.
[0047] The clamping assembly includes a moving block 3, a buffer layer 4 for wrapping the core, and several "L"-shaped clamping arms 5. In this embodiment, the buffer layer 4 is made of an elastic material; a clamping groove is formed in the circumferential direction of the moving block 3; clamping blocks 6 are integrally formed at the transverse ends of the clamping arms 5 and extend into the clamping groove, and the middle parts of the transverse ends of the clamping arms 5 are hinged to the inner side wall of the base 2; the vertical ends of the clamping arms 5 extend outside the base 2 and are fixedly connected with sleeves 7 by screws, and the other sides of the sleeves 7 are in contact with the buffer layer 4.
[0048] A driving assembly for driving the vertical movement of the moving block 3 and a cleaning assembly for cleaning the core are further provided inside the base 2.
[0049] Combined Figure 2 As shown, the driving assembly includes a lead screw 8, a nut seat 9, a controller, and a rotating member. In this embodiment, the rotating member is a motor 10, and the controller is used to control the rotation of the motor 10; the motor 10 is fixedly connected to the inner bottom wall of the base 2 by screws, and the output shaft of the motor 10 is coaxially and fixedly clamped with the lead screw 8; the top end of the lead screw 8 penetrates through the moving block 3 and is in threaded cooperation with the nut seat 9, and the nut seat 9 is located at the top of the moving block 3; a first spring 11 is fixedly connected to the bottom of the moving block 3 by screws, and the bottom end of the first spring 11 is fixedly connected to the top of the motor 10 by screws.
[0050] The cleaning assembly includes a cleaning chamber 12, and the cleaning chamber 12 is located inside the base 2; an annular piston 13 is slidably fitted to the inner side wall of the cleaning chamber 12, and a piston rod 14 is fixedly connected to the bottom of the moving block 3 along its circumferential direction, and the bottom ends of the piston rods 14 are fixedly bonded to the annular piston 13; an input pipe and an output pipe are communicated with the bottom of the cleaning chamber 12, and one-way valves are communicated with the cleaning chamber 12 at the connection parts of the input pipe and the output pipe; the other end of the input pipe is communicated with a liquid storage bucket, and the top end of the output pipe is communicated with the side of the buffer layer 4 away from the sleeve 7.
[0051] A drying assembly for drying the core is provided inside the buffer layer 4. The drying assembly includes an inflating member. In this embodiment, the inflating member is an air pump, and the controller is used to control the inflating member to inflate; a cavity is formed inside the buffer layer 4, the output end of the inflating member is communicated with the cavity, and a plurality of ventilation holes are formed in the circumferential direction of the side wall of the buffer layer 4 away from the sleeve 7.
[0052] Adjusting assemblies for adjusting the clamping force of the clamping arms 5 are provided inside the sleeves 7. The adjusting assemblies include a top block 15, a second spring 16, a magnetic attraction block 17, and several electromagnets 18, and the controller is used to control the opening and closing of the electromagnets 18; one end of the second spring 16 is fixedly connected to the inner side wall of the sleeve 7 by screws, and the other end of the second spring 16 is fixedly connected to the top block 15 by screws; the electromagnets 18 are all embedded in the inner bottom wall of the sleeve 7, the magnetic attraction block 17 is embedded in the bottom of the top block 15, and the electromagnets 18 are all magnetically connected to the magnetic attraction block 17.
[0053] The specific implementation process is as follows:
[0054] Before the detection, the core is first placed into the detection cylinder 1 and placed inside the inner side of the buffer layer 4 away from the sleeve 7, and then the cover plate is closed. The motor 10 drives the screw rod 8 to rotate. Since the nut seat 9 is in threaded engagement with the screw rod 8 and the nut seat 9 is located on the top of the moving block 3, the rotation of the screw rod 8 can drive the nut seat 9 to move. When the nut seat 9 moves downward, it can drive the moving block 3 to move downward.
[0055] Since the bottom of the moving block 3 is fixedly connected to the first spring 11 by screws, and the bottom end of the first spring 11 is fixedly connected to the top of the motor 10 by screws, when the nut seat 9 moves upward, the moving block 3 will be pushed up by the first spring 11 and thus move upward. In this way, the vertical position of the moving block 3 is adjusted.
[0056] Since the moving block 3 is provided with a card slot along its circumferential direction, a clamping block 6 is arranged in the card slot, the clamping block 6 is integrally formed with the clamping arm 5, and the clamping arm 5 is hinged to the base 2, the clamping arm 5 can clamp and release the buffer layer 4 during the vertical movement of the moving block 3.
[0057] Take Figure 1 as an example. When the moving block 3 drives the clamping block 6 to move downward, the clamping arm 5 will rotate around its hinge point with the base 2. When rotating, the vertical ends of the two clamping arms 5 will clamp inward; otherwise, the clamping force can be released. Since the vertical end of the clamping arm 5 is fixedly connected to the sleeve 7 by screws, and the other side of the sleeve 7 is in contact with the buffer layer 4; the buffer layer 4 can be squeezed or released by the clamping arm 5, and when squeezing, the buffer layer 4 is used to clamp the core.
[0058] Since the annular piston 13 is in sliding fit with the inner side wall of the cleaning chamber 12, the annular piston 13 is fixedly bonded to the piston rod 14, and the piston rod 14 is fixedly connected to the moving block 3 by screws; during the reciprocating movement of the moving block 3, the piston rod 14 can drive the annular piston 13 to reciprocate, and the reciprocating movement of the annular piston 13 generates suction or thrust. Since the cleaning chamber 12 is communicated with an input pipe and an output pipe, the input pipe is communicated with a liquid storage bucket. In this embodiment, the liquid storage bucket is used to store the cleaning liquid required for cleaning the core, and the cleaning liquid is acetone; the output pipe is communicated with the side of the buffer layer 4 away from the sleeve 7. Therefore, when the moving block 3 drives the clamping arm 5 to clamp, the piston rod 14 will drive the annular piston 13 to move downward, thereby generating a thrust to transport the cleaning liquid inside the cleaning chamber 12 to the core and using the cleaning liquid to clean the surface of the core.
[0059] Since a number of ventilation holes are provided on the side wall of the buffer layer 4 away from the sleeve 7, and the output end of the inflating member is communicated with the cavity inside the buffer layer 4, the inside of the buffer layer 4 can be inflated through the inflating member. After inflation is completed, during the process of the clamping arm 5 clamping the buffer layer 4, the buffer layer 4 can be extruded. When extruding, the gas inside the buffer layer 4 is extruded to the side of the buffer layer 4 away from the sleeve 7, so as to dry the surface of the cleaned core by using the extruded air flow, and a measurement area is cleared on the surface of the core.
[0060] Since both ends of the second spring 16 are fixedly connected to the top block 15 and the inner side wall of the sleeve 7 by screws respectively, a magnetic attraction block 17 is embedded at the bottom of the top block 15, and the electromagnets 18 are all embedded in the inner bottom wall of the sleeve 7; therefore, the top block 15 can be adjusted to different positions by controlling the magnetic attraction opening and closing of the electromagnets 18 and the magnetic attraction blocks 17. Figure 3 Taking it as an example, when the magnetic force of the rightmost electromagnet 18 is turned off, the magnetic attraction block 17 is separated from the connection with the rightmost electromagnet 18, and then the magnetic force of the leftmost electromagnet 18 is turned on. Through the elastic force of the second spring 16, the magnetic attraction block 17 will be connected to the leftmost electromagnet 18, so as to push the top block 15 to the outside of the sleeve 7; on the contrary, the top block 15 can be attracted into the sleeve 7, realizing the adjustment of the position of the top block 15. During the process of the gas inside the buffer layer 4 being extruded, the volume of the buffer layer 4 gradually becomes smaller. By extending the top block 15 to the outside of the sleeve 7, the clamping force of the clamping arm 5 is further increased, reducing the possibility of clamping failure due to the decrease in the volume of the buffer layer 4.
[0061] In the prior art, when cleaning and drying the core, additional driving force usually needs to be increased, resulting in an increase in equipment cost. In this embodiment, the cleaning liquid in the cleaning chamber 12 is conveyed to the surface of the core by the downward pressure of the moving block 3, so as to clean a measurement area on the surface of the core; and the surface of the cleaning is dried by the clamping force of the clamping arm 5. Only one driving force is required to realize multiple functions, thus reducing the cost of the equipment.
[0062] The vertical movement of the moving block 3 is driven by the nut seat 9, realizing the quick clamping and release of the clamping arm 5, ensuring the accuracy and controllability of the clamping process, avoiding the situations of over-compression or insufficient clamping, thus protecting the core sample from damage and ensuring the accuracy of the measurement result. By providing the buffer layer 4, when the clamping arm 5 exerts extrusion, the buffer layer 4 will exert a uniform pressure on the core; it can effectively reduce the damage of the core caused by local high-pressure points during the clamping process, thus protecting the integrity of the core and being applicable to brittle rock samples.
[0063] Embodiment 2:
[0064] Such as Figure 1As shown, the difference from the above embodiments is that several arc-shaped probes 19 are provided inside the detection cylinder 1, and the controller is used to control the arc-shaped probes 19 to apply pressure to the core.
[0065] The specific implementation process is as follows: Pressure is applied to the measurement area of the core through the arc-shaped probes 19, and the magnitude of the pressure can be adjusted, so as to simulate the test requirements under different pressure environments.
[0066] Embodiment 3:
[0067] The difference from the above embodiments is that several pressure sensors are also provided inside the detection cylinder 1, and the controller is used to receive and store the pressure information sent by the pressure sensors.
[0068] The specific implementation process is as follows: Pressure information at different positions is obtained through the pressure sensors, so as to obtain the pressure changes at different positions of the core, and then the calculation of the core permeability can be realized subsequently.
[0069] Embodiment 4:
[0070] As Figure 1 shown, the difference from the above embodiments is that several telescopic members are fixedly connected to the inner wall of the detection cylinder 1 by screws. In this embodiment, the telescopic members are selected as electric push rods 20, and the output shafts of the electric push rods 20 are fixedly connected to the arc-shaped probes 19 and the pressure sensors by screws, and the controller is used to control the telescopic movement of the electric push rods 20.
[0071] The specific implementation process is as follows: Through the design of the electric push rods 20, the arc-shaped probes 19 and the pressure sensors can both fit on the surface of the core, so as to realize the detection of data.
[0072] Embodiment 5:
[0073] As shown in the appendix Figure 1 shown, the difference from the above embodiments is that a groove is opened at the top of the moving block 3, and the nut seat 9 is located above the groove.
[0074] The specific implementation process is as follows: Through the design of the groove, an installation position can be provided for the nut seat 9, so as to make the movement trajectory of the moving block 3 stable.
[0075] Embodiment 6:
[0076] As shown in the appendix Figure 4 shown, the difference from the above embodiments is that the detection system includes a data acquisition module for collecting data, a calculation module for analyzing and calculating data, and an interaction module for displaying the calculation results.
[0077] The functions of each module are explained in turn as follows:
[0078] The data acquisition module is used to obtain the key parameters related to the core permeability. In this embodiment, the key parameters mainly include the pressure change of the transported gas, gas viscosity, gas flow rate, the length of the core, cross-sectional dimensions, and the pressure difference on both sides, etc.; and transmit the collected key parameters to the calculation module.
[0079] The calculation module is used to receive the key parameters sent by the data acquisition module, calculate the core permeability based on the key parameters, and output the permeability calculation result. Among them, the permeability is calculated by Darcy's law, and its formula is as follows:
[0080]
[0081] In the formula, K is the permeability, Q is the gas flow rate through the core, μ is the dynamic viscosity of the gas, L is the length of the gas passing through the core, A is the cross-sectional area of the gas passing through the core, and ΔP is the pressure difference at both ends of the gas passing through the core.
[0082] The interaction module is used to provide the display of the permeability calculation result. In this embodiment, the interaction module selects a display screen. By obtaining the key parameters related to the core permeability and calculating the core permeability for the key parameters, an automated operation mode can reduce manual intervention and operation steps, thereby improving the detection efficiency.
[0083] Obviously, the above embodiments are only examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.
Claims
1. An apparatus for on-site determination of permeability in drilling logging, comprising a detection cylinder (1) and a base (2), the base (2) being fixedly connected to the inner bottom wall of the detection cylinder (1); an opening is provided at the top of the detection cylinder (1), and a cover plate is hinged at the opening, characterized in that, It also includes a detection system for detecting the core permeability, and a clamping assembly for clamping the core is provided on the base (2); The clamping assembly includes a moving block (3), a buffer layer (4) for wrapping the core, and a number of "L"-shaped clamping arms (5). A clamping groove is formed in the circumferential direction of the moving block (3); the transverse ends of the clamping arms (5) all extend into the clamping groove and are fixedly connected with clamping blocks (6). The middle parts of the transverse ends of the clamping arms (5) are all hinged to the inner side wall of the base (2); the vertical ends of the clamping arms (5) all extend outside the base (2) and are fixedly connected with sleeves (7), and one side of the sleeve (7) away from the clamping arm (5) is in contact with the buffer layer (4); A driving assembly for driving the vertical movement of the moving block (3) and a cleaning assembly for cleaning the core are also provided inside the base (2); A drying assembly for drying the core is provided inside the buffer layer (4); Adjusting assemblies for adjusting the clamping force of the clamping arms (5) are provided inside the sleeves (7).
2. The device for on-site determination of permeability in drilling logging according to claim 1, wherein The driving assembly includes a lead screw (8), a nut seat (9), a controller, and a rotating member. The controller is used to control the rotation of the rotating member; the rotating member is fixedly connected to the inner bottom wall of the base (2), and the output shaft of the rotating member is coaxially fixedly connected to the lead screw (8); the top end of the lead screw (8) penetrates through the moving block (3) and is in threaded cooperation with the nut seat (9). The nut seat (9) is located on the top of the moving block (3); a first spring (11) is fixedly connected to the bottom of the moving block (3), and the bottom end of the first spring (11) is fixedly connected to the rotating member.
3. The device for on-site determination of permeability in drilling logging according to claim 2, wherein, The cleaning assembly includes a cleaning chamber (12), and the cleaning chamber (12) is located inside the base (2); a ring-shaped piston (13) is slidably fitted to the inner side wall of the cleaning chamber (12). A piston rod (14) is fixedly connected to the bottom of the moving block (3) along its circumferential direction, and the bottom ends of the piston rods (14) are all fixedly connected to the ring-shaped piston (13); an input pipe and an output pipe are communicated with the bottom of the cleaning chamber (12), and one-way valves are communicated with the joints of the input pipe and the output pipe with the cleaning chamber (12); one end of the input pipe away from the cleaning chamber (12) is communicated with a liquid storage bucket, and one end of the output pipe away from the cleaning chamber (12) is communicated with the side of the buffer layer (4) away from the sleeve (7).
4. The device for on-site determination of permeability in drilling logging according to claim 3, characterized in that, The drying assembly includes an inflating member, and the controller is used to control the inflating member to inflate; a cavity is formed inside the buffer layer (4), the output end of the inflating member is communicated with the cavity, and a number of ventilation holes are formed in the circumferential direction of the side wall of the buffer layer (4) away from the sleeve (7).
5. The device for on-site determination of permeability in drilling logging according to claim 4, characterized in that, The adjusting assembly includes a top block (15), a second spring (16), a magnetic attraction block (17), and a number of electromagnets (18). The controller is used to control the opening and closing of the electromagnets (18); one end of the second spring (16) is fixedly connected to the inner side wall of the sleeve (7), and the other end of the second spring (16) is fixedly connected to the top block (15); the electromagnets (18) are all embedded and installed on the inner bottom wall of the sleeve (7), the magnetic attraction block (17) is embedded and installed at the bottom of the top block (15), and the electromagnets (18) are all magnetically connected to the magnetic attraction block (17).
6. The device for on-site determination of permeability in drilling logging according to claim 5, characterized in that, A number of arc-shaped probes (19) are provided inside the detection cylinder (1), and the controller is used to control the arc-shaped probes (19) to apply pressure to the core.
7. The device for on-site determination of permeability in drilling logging according to claim 6, characterized in that, A number of pressure sensors are also provided inside the detection cylinder (1), and the controller is used to receive and store the pressure information sent by the pressure sensors.
8. The device for on-site determination of permeability in drilling logging according to claim 7, characterized in that, A number of telescopic members are also fixedly connected to the inner wall of the detection cylinder (1), and the output shafts of the telescopic members are fixedly connected to the arc-shaped probe (19) and the pressure sensors respectively. The controller is used to control the telescopic members to expand and contract.
9. The device for on-site determination of permeability in drilling logging according to claim 8, wherein, A groove is formed at the top of the moving block (3), and the nut seat (9) is located above the groove.
10. The device for on-site determination of permeability in drilling logging according to claim 9, characterized in that, The detection system includes the following modules: The data acquisition module is used to obtain the key parameters related to the core permeability. The key parameters include gas pressure change, gas flow rate, gas viscosity, core length and core cross-sectional size; and transmit the collected key parameters to the calculation module. The calculation module is used to receive the key parameters sent by the data acquisition module, calculate the core permeability based on the key parameters, and output the permeability calculation result. The interaction module is used to provide the display of the permeability calculation result.