Shale gas exploration auxiliary equipment

Abstract

The utility model relates to the technical field of shale gas exploration equipment, in particular to shale gas exploration auxiliary equipment which comprises a cylindrical shell, a driving motor is connected and installed in the cylindrical shell through an installation support, an output shaft of the driving motor is connected with a lead screw, the lead screw is connected with a spiral sliding sleeve in an engaged mode, and the spiral sliding sleeve is connected with a rotary shaft. The spiral sliding sleeve is peripherally sleeved with a sliding seat with a concave longitudinal section, a cover plate is arranged at the top of the sliding seat, and the cover plate and the sliding seat form a coating structure to fixedly sleeve the spiral sliding sleeve up and down; the driving motor drives the lead screw to rotate, so that the spiral sliding sleeve is driven to drive the sliding seat to ascend and descend along the lead screw, and along with descending of the sliding seat, the supporting rod located on the sliding seat is diverged outwards on the notch to form parachute opening motion, so that supporting is formed on the well wall, the whole well wall sampling equipment is fixed, and the accuracy and stability of the sampling process are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shale gas exploration equipment, in particular to shale gas exploration auxiliary equipment. Background Art

[0002] Shale gas is a natural gas resource stored in shale layers. China has abundant shale gas resources. With the increasing demand for clean energy and the continuous rise in traditional energy consumption, the development of shale gas has attracted much attention. Before shale gas development, exploration work is required. During the exploration process, shale in the potential development area needs to be sampled, usually using wellbore sampling technology. This technology involves lowering the sampling equipment to a predetermined depth through a cable and obtaining formation rock samples from the wellbore wall. However, during the wellbore sampling process, the sampling equipment is easily disturbed by vibration, especially when the logging diameter is large. In addition, if the position of the sampling equipment is fixed unstably, it will affect the accuracy and stability of the sampling process, which will have an adverse effect on the exploration work. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model provides a shale gas exploration auxiliary device, comprising: a cylindrical shell, the cylindrical shell is used to be fixedly connected to a well wall sampling device;

[0004] A drive motor is installed inside the cylindrical shell through a mounting bracket, the output shaft of the drive motor is connected to a lead screw, a spiral sleeve is meshedly connected to the lead screw, a sliding seat with a concave longitudinal section is circumferentially sleeved on the spiral sleeve, a cover plate is provided on the top of the sliding seat, and the cover plate and the sliding seat form a covering structure to fit the spiral sleeve up and down and fix it;

[0005] A plurality of first hinge seats are symmetrically distributed on the ground edge of the slide seat, a support rod is installed on each of the first hinge seats, and a slot is penetrated through the cylindrical shell to accommodate the movement of the support rod.

[0006] Preferably, one end of the support rod away from the first hinge seat is connected to a foot support through a second hinge seat, and the foot support is in an arc shape matching the corresponding notch, and the foot support can be completely fitted with the outer wall of the cylinder under the action of the support rod.

[0007] Preferably, each of the foot supports is evenly distributed on its outer arc surface with anti-skid spikes, and the material of the anti-skid spikes is wear-resistant steel.

[0008] Preferably, the notch is a tapered hole structure that is smaller inside and larger outside, the foot support is a draft arc panel structure that is smaller inside and larger outside, and a sealing ring is provided on the side of each foot support.

[0009] Preferably, the bottom surface of the spiral sleeve is provided with a lower bearing which is in cooperation with the bottom of the slide seat, and the top surface of the spiral sleeve is provided with an upper bearing which is in cooperation with the bottom of the cover plate, and the lower bearing and the upper bearing are both thrust ball bearings.

[0010] Preferably, an ascending limit switch and a descending limit switch are provided inside the cylindrical shell, and when the cover plate rises to the top surface and contacts the ascending limit switch, the foot support is located in a state of being completely retracted into the corresponding slot; when the slide seat descends to the bottom surface and contacts the descending limit switch, the foot support is located in a state of being perpendicular to the cylindrical shell.

[0011] Compared with the prior art, the utility model provides a shale gas exploration auxiliary equipment with the following features:

[0012] Beneficial effects:

[0013] 1. The drive motor drives the lead screw to rotate, thereby driving the spiral sleeve to drive the slide to move up and down along the lead screw. As the slide descends, the support rods on the slide diverge outward on the slot to form an umbrella-opening movement, thereby forming support on the well wall, fixing the entire well wall sampling equipment, and improving the accuracy and stability of the sampling process.

[0014] 2. The notch is a tapered hole structure that is small inside and large outside, and the foot support is a draft arc panel structure that is small inside and large outside. A sealing ring is provided on the side of each foot support to form a fitting sealing structure. In the process of entering and exiting the mine, dust and broken cores are prevented from entering the cylindrical shell through the notch, thereby increasing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a top view of the utility model;

[0017] Figure 3 for Figure 2 AA section view.

[0018] In the figure: 1. cylindrical shell; 2. driving motor; 3. mounting bracket; 4. lead screw; 5. slide seat; 6. cover plate; 7. spiral sleeve; 8. first hinge seat; 9. support rod; 10. second hinge seat; 11. foot support; 12. sealing ring; 13. anti-slip spikes; 14. notch; 15. lower bearing; 16. upper bearing; 17. lift limit switch; 18. lower limit switch. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example

[0021] The utility model provides a shale gas exploration auxiliary device, comprising: a cylindrical shell 1, wherein the cylindrical shell 1 is used for fixed connection with a well wall sampling device;

[0022] A drive motor 2 is connected and installed inside the cylindrical shell 1 through a mounting bracket 3, and a lead screw 4 is connected to the output shaft of the drive motor 2. A spiral sleeve 7 is meshed and connected to the lead screw 4. A slide seat 5 with a concave longitudinal section is circumferentially sleeved and installed on the spiral sleeve 7. A cover plate 6 is provided on the top of the slide seat 5. The cover plate 6 and the slide seat 5 form a covering structure to fit the spiral sleeve 7 up and down and fix it;

[0023] The sliding seat 5 has a plurality of first hinge seats 8 symmetrically distributed on the ground edge, each of which is provided with a support rod 9. The cylindrical shell 1 is provided with a slot 14 for accommodating the movement of the support rod 9. The plurality of first hinge seats 8 mentioned above is not less than 3, and three or more symmetrically distributed support rods 9 can automatically balance the axis.

[0024] The driving motor 2 drives the lead screw 4 to rotate, thereby driving the spiral sleeve 7 to drive the slide 5 to rise and fall along the lead screw 4. As the slide 5 descends, the support rod 9 located on the slide 5 diverges outward on the slot 14 to form an umbrella-opening movement, thereby forming a support on the well wall, fixing the entire well wall sampling equipment, and improving the accuracy and stability of the sampling process. Compared with gear, belt and other transmissions, the lead screw 4 transmission has a certain self-locking property, which can prevent the support rod 9 from moving in the opposite direction under the action of external force, loosening the support for the well wall and causing danger.

[0025] The end of the support rod 9 away from the first hinge seat 8 is connected to a foot support 11 through a second hinge seat 10. The foot support 11 can increase the contact area with the shaft wall. The shape of the foot support 11 is an arc surface that matches the corresponding notch 14. Under the action of the support rod 9, the foot support 11 can be completely fitted with the outer wall of the cylinder, which can reduce the overall axial size and improve the practicality of the site. Furthermore, it can avoid interference and collision with the shaft wall during the process of entering and exiting the mine.

[0026] Each of the foot supports 11 is evenly provided with anti-skid spikes 13 on its outer arc surface. The anti-skid spikes 13 are made of wear-resistant steel. The anti-skid spikes 13 can strengthen the fixation with the well wall in some soft geological environments, and the wear-resistant steel can increase the service life of the anti-skid spikes 13 .

[0027] The notch 14 is a tapered hole structure that is small inside and large outside, and the foot support 11 is a draft arc panel structure that is small inside and large outside. A sealing ring 12 is provided on the side of each foot support 11 to form a fitting sealing structure. During the process of entering and exiting the mine, dust and debris are prevented from entering the cylindrical shell 1 through the notch 14, thereby increasing the service life.

[0028] The bottom surface of the spiral sleeve 7 is provided with a lower bearing 15 that cooperates with the bottom of the slide seat 5. The top surface of the spiral sleeve 7 is provided with an upper bearing 16 that cooperates with the bottom of the cover plate 6. The lower bearing 15 and the upper bearing 16 are both thrust ball bearings, which change from sliding friction to rolling friction, thereby reducing the friction between the spiral sleeve 7 and the slide seat 5 and the cover plate 6, avoiding jamming, hard friction and the like, and protecting the drive motor 2.

[0029] An ascending limit switch 17 and a descending limit switch 18 are provided inside the cylindrical shell 1. When the cover plate 6 rises to the top surface and contacts the ascending limit switch 17, the foot support 11 is located in a state of being completely retracted into the corresponding slot 14; when the slide seat 5 descends to the bottom surface and contacts the descending limit switch 18, the foot support 11 is located in a state of being perpendicular to the cylindrical shell 1.

[0030] In some embodiments, the fixing degree of the foot support 11 and the well wall can be indirectly detected by detecting the power of the driving motor 2, that is, when the power of the driving motor 2 reaches the set value, it can be determined that the fixing degree of the foot support 11 and the well wall has reached a reliable level, at which time the application of the driving power signal to the driving motor 2 can be stopped, and the entire cylindrical shell 1 and the well wall sampling device can be fixed by using the self-locking property of the lead screw 4 transmission;

[0031] In another embodiment, the slide 5 descends, and the support rod 9 on the slide 5 diverges outward on the slot 14 to form an umbrella-opening movement. When the foot support 11 is in a state perpendicular to the cylindrical shell 1, the foot support 11 reaches the maximum expansion position, and the supporting pressure on the well wall is the maximum. At this time, the slide 5 descends to the bottom surface and contacts the limit-dropping switch 18. At this time, the power supply signal applied to the drive motor 2 can be stopped, and the self-locking property of the screw 4 transmission can be used to fix the entire cylindrical shell 1 and the well wall sampling equipment; the use and setting method of the limit-up switch 17 are similar to those of the limit-down switch 18, and no further details will be given.

[0032] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A shale gas exploration auxiliary equipment, characterized in that: include: A cylindrical shell (1), wherein the cylindrical shell (1) is used for fixedly connecting to a well wall sampling device; A drive motor (2) is connected and installed inside the cylindrical shell (1) via a mounting bracket (3); the output shaft of the drive motor (2) is connected to a lead screw (4); a spiral sleeve (7) is meshingly connected to the lead screw (4); a slide seat (5) having a concave longitudinal section is circumferentially sleeved and installed on the spiral sleeve (7); a cover plate (6) is provided on the top of the slide seat (5); the cover plate (6) and the slide seat (5) form a covering structure to fit the spiral sleeve (7) up and down and fix it; A plurality of first hinge seats (8) are symmetrically distributed on the ground edge of the slide seat (5), a support rod (9) is installed on each of the first hinge seats (8), and a slot (14) is penetrated through the cylindrical shell (1) to accommodate the movement of the support rod (9).

2. The shale gas exploration auxiliary equipment according to claim 1, characterized in that: The end of the support rod (9) away from the first hinge seat (8) is connected to a foot support (11) through a second hinge seat (10); the foot support (11) is in the shape of an arc surface that matches the corresponding notch (14); and the foot support (11) can be completely fitted with the outer wall of the cylinder under the action of the support rod (9).

3. The shale gas exploration auxiliary equipment according to claim 2, characterized in that: The outer arc surface of each foot support (11) is evenly distributed with anti-skid spikes (13), and the material of the anti-skid spikes (13) is wear-resistant steel.

4. The shale gas exploration auxiliary equipment according to claim 2, characterized in that: The notch (14) is a tapered hole structure that is smaller inside and larger outside, the foot support (11) is a draft arc panel structure that is smaller inside and larger outside, and a sealing ring (12) is provided on the side of each foot support (11).

5. The shale gas exploration auxiliary equipment according to claim 1, characterized in that: The bottom surface of the spiral sleeve (7) is provided with a lower bearing (15) which is in mating contact with the bottom of the slide seat (5); the top surface of the spiral sleeve (7) is provided with an upper bearing (16) which is in mating contact with the bottom of the cover plate (6); the lower bearing (15) and the upper bearing (16) are both thrust ball bearings.

6. The shale gas exploration auxiliary equipment according to claim 2, characterized in that: An ascending limit switch (17) and a descending limit switch (18) are provided inside the cylindrical shell (1); when the cover plate (6) rises to the top surface and contacts the ascending limit switch (17), the foot support (11) is in a state of being completely retracted into the corresponding notch (14); when the slide seat (5) descends to the bottom surface and contacts the descending limit switch (18), the foot support (11) is in a state of being perpendicular to the cylindrical shell (1).

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