Fracturing downhole parameter monitoring device

Abstract

The utility model discloses a fracturing downhole parameter monitoring device which comprises a three-component geophone and a placing circular plate which are detachably connected in sequence from top to bottom. The supporting base is of an L-shaped structure, the side wall of the supporting base is connected with the well wall of the fractured well through bolts, and the middle of the bottom wall of the supporting base is connected with the containing circular plate through an automatic correction assembly; the automatic correction assembly comprises a ball sleeve, the upper end and the lower end of the ball sleeve are each of an open structure, and the side wall of the ball sleeve is fixedly connected with the bottom wall of the supporting base through a connecting rod; the ball is rotatably arranged in the ball sleeve, the upper end of the ball is connected with the placing circular plate, the lower end of the ball is detachably connected with a plumb bob, and the center of the placing circular plate, the center of the ball and the axis of the plumb bob are collinear; by means of the characteristic that the placing circular plate, the ball and the plumb bob are coaxially arranged, automatic horizontal correction is carried out on the placing circular plate supporting the three-component geophone; therefore, the three-component geophone calibration device can play a role in quickly calibrating the three-component geophone.

Description

Technical Field

[0001] The utility model relates to the technical field of downhole parameter monitoring, in particular to a downhole parameter monitoring device for fracturing. Background Art

[0002] The changing relationship between downhole pressure and time during the fracturing process can reflect the extension law of underground cracks and formation characteristics. Accurately grasping the downhole pressure, temperature, microseismicity and other state parameters during the fracturing operation is of great significance for guiding fracturing operations and evaluating operation effects.

[0003] During the mining process, hydraulic fracturing involves injecting fluids under high pressure to fracture underground rock. Three-component geophones are typically used for microseismic monitoring to precisely locate the fractures. Three-component geophones play a crucial role in microseismic monitoring, capable of simultaneously recording seismic wave vibrations in three orthogonal directions (the X, Y, and Z axes, meaning two orthogonal horizontal directions and the vertical direction). Using their electromechanical transducers (X, Y, and Z axes), three-component geophones can record seismic wave vibrations from different directions. The horizontal placement of the three-component geophone ensures that the X and Y axes are parallel to the ground, effectively recording shear wave information. The Z axis of the three-component geophone, perpendicular to the ground, records longitudinal wave information.

[0004] However, when placing a three-component geophone underground, it needs to be fixed to the well wall through an L-shaped support base, a hole is drilled on the well wall, and then the support base is fixed with expansion bolts. In order to ensure the horizontal state of the three-component geophone, a hole needs to be drilled first, and then one corner of the support base needs to be fixed to the well wall. The horizontal state of the support base is then measured with a spirit level, and then the second drilling position is marked on the well wall. However, this support base calibration method is not convenient for rapid calibration of the three-component geophone. At the same time, when locating the second borehole, there will be a deviation from the actual drilling position of the drill bit. At the same time, since the well wall is mostly irregular in shape, even after the second borehole is located and fixed with two sets of expansion bolts, the support base will fit the irregular well wall, which will cause the support base to tilt to varying degrees. Therefore, it is necessary to use the spirit level a second time to fine-tune the support base, which makes the overall operation more complicated and is not conducive to the rapid fixation and use of the three-component geophone. Summary of the Invention

[0005] In response to the above technical problems, the present invention provides a fracturing downhole parameter monitoring device, which automatically corrects the horizontal position of the circular plate supporting the three-component seismic detector by setting a plumb bob for automatic sag correction; thereby, the present invention can quickly calibrate the three-component seismic detector.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical means:

[0007] A fracturing downhole parameter monitoring device includes a three-component seismic detector and a placement circular plate that are detachably connected in sequence from top to bottom; and further includes:

[0008] The support seat is L-shaped, with its side walls connected to the well wall of the fracturing well by bolts, and the middle part of its bottom wall connected to the placement circular plate by an automatic correction component; wherein the automatic correction component includes:

[0009] The ball sleeve has an open structure at both ends, and its side walls are fixedly connected to the bottom wall of the support seat through a connecting rod;

[0010] A ball is rotatably disposed inside the ball sleeve, with its upper end connected to the placement circular plate and its lower end detachably connected to a plumb bob, wherein the center of the placement circular plate, the center of the ball, and the axis of the plumb bob are collinearly arranged;

[0011] A locking assembly is inserted into one side of the ball sleeve; the locking assembly is used to lock the relative position between the ball and the ball sleeve.

[0012] The bottom of the three-component geophone is fixedly mounted with a plurality of legs, and the center of the bottom is fixedly mounted with a first threaded tube;

[0013] A second screw rod threadably connected to the first threaded pipe is coaxially fixed on the upper surface of the placement circular plate.

[0014] The length of the first threaded tube is smaller than the length of the supporting leg.

[0015] The plumb bob is threadably connected to the spherical ball via a third screw.

[0016] The side wall of the support seat is provided with a mounting hole for the bolt to pass through.

[0017] The middle portion of the side wall of the support seat abuts against the well wall of the fracturing well through at least two support rods, and the support rods include a first screw rod and a third threaded tube;

[0018] One end of the first screw is threadedly connected to the second threaded tube provided on the side wall of the support seat, and the other end thereof is threadedly connected to the third threaded tube;

[0019] The third threaded tube rotates along the first screw rod to achieve flexible adjustment of the length of the support rod; the support rod rests against the wall of the fracturing well to support the side wall of the support seat.

[0020] The locking assembly includes a locking screw and a rubber pressure head;

[0021] The locking screw is threadedly connected to one side of the ball sleeve and abuts against the ball through the rubber pressure head;

[0022] The rubber pressure head slides in the receiving cavity opened in the ball sleeve; the rubber pressure head is adapted to the receiving cavity structure.

[0023] The end of the rubber pressure head close to the ball is an arc-shaped structure.

[0024] The bottom wall of the support seat is provided with an operation opening on a side away from the side wall.

[0025] A universal level is embedded in the upper surface of the circular plate.

[0026] The beneficial effects of the utility model are as follows:

[0027] First, the monitoring device provided by the present application realizes automatic horizontal correction of the placement circular plate supporting the three-component seismic detector by setting a plumb bob for automatic droop correction and taking advantage of the coaxial arrangement of the placement circular plate, the ball and the plumb bob; at the same time, after the correction is completed, the ball is locked by rotating the locking screw to fix the orientation of the placement circular plate; thereby, the utility model can quickly calibrate the three-component seismic detector.

[0028] Second, the side walls of the support seat provided in the present application are initially fixed by means of expansion bolts passing through the mounting holes; and then by adjusting the length of the support rod, the support rod is made to rest against the wall of the fracturing well, so that the side walls of the support seat suspended at the waist are supported; thereby, the present invention can improve the stability of the support seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] The above and other aspects of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0031] Figure 1 This is a schematic diagram of the overall structure of a downhole fracturing parameter monitoring device according to the present application;

[0032] Figure 2 This is a schematic diagram of the overall left side structure of a downhole parameter monitoring device for fracturing according to the present application;

[0033] Figure 3This is a schematic diagram of the ball sleeve structure of a downhole fracturing parameter monitoring device of the present application;

[0034] Figure 4 This is a schematic diagram of the cross-sectional structure of a ball sleeve of a downhole fracturing parameter monitoring device according to the present application;

[0035] Figure 5 This is a schematic diagram of the placement of a circular plate and a sphere structure of a fracturing downhole parameter monitoring device in this application;

[0036] Figure 6 This is a schematic diagram of the plumb bob structure of a downhole fracturing parameter monitoring device according to the present application;

[0037] Figure 7 This is a schematic diagram of the support rod structure of a downhole fracturing parameter monitoring device of the present application;

[0038] Figure 8 This is a schematic diagram of the locking screw structure of a downhole fracturing parameter monitoring device of the present application;

[0039] Figure 9 This is a schematic diagram of the structure of a three-component seismic detector of a downhole fracturing parameter monitoring device in this application.

[0040] In the figure: 1. Three-component seismic detector; 101. Support leg; 102. First threaded tube; 2. Support seat; 201. Vertical plate; 2011. Second threaded tube; 2012. Mounting hole; 202. Horizontal plate; 2021. Operation port; 3. Support rod; 301. First screw; 302. Third threaded tube; 4. Placement circular plate; 401. Second screw; 5. Ball; 501. Third screw; 6. Plumb bob; 601. Threaded hole; 7. Ball sleeve; 701. Storage cavity; 702. Locking screw; 703. Rubber pressure head; 8. Universal level. DETAILED DESCRIPTION

[0041] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0042] like Figure 1-9 As shown, the utility model provides a fracturing downhole parameter monitoring device, including a three-component seismic detector 1 and a placement circular plate 4 that are detachably connected from top to bottom; it also includes: a support seat 2, which has an L-shaped structure, whose side walls are connected to the wall of the fracturing well by bolts, and the middle part of its bottom wall is connected to the placement circular plate 4 by an automatic correction component.

[0043] like Figure 2 and 5As shown, the automatic correction assembly includes: a ball sleeve 7 with open ends, the side walls of which are fixedly connected to the bottom wall of the support base 2 via a connecting rod; a ball 5 rotatably mounted inside the ball sleeve 7, the upper end of which is connected to the placement circular plate 4, and the lower end of which is detachably connected to a plumb bob 6, the center of the placement circular plate 4, the center of the ball 5, and the axis of the plumb bob 6 being collinear; a locking assembly inserted into one side of the ball sleeve 7; the locking assembly is used to lock the relative position between the ball 5 and the ball sleeve 7. The openings at both ends of the ball sleeve 7 are smaller than the outer diameter of the ball 5 to ensure that the ball 5 can rotate within the ball sleeve 7 while preventing it from falling out.

[0044] The plumb bob 6 droops due to gravity and, with the help of the ball 5 , drives the placement circular plate 4 to adjust to a horizontal placement state, thereby achieving calibration between the three-component geophone 1 and the placement circular plate 4 .

[0045] like Figure 2 、 3 As shown in Figures 7 and 8, the sidewalls of the support base 2 are provided with mounting holes 2012 for bolts to pass through. At the same time, the middle portion of the sidewalls of the support base 2 abuts against the wall of the fracturing well via at least two support rods 3. The support base 2 can be fixed to the well wall at will and then supported between the support base 2 and the well wall by a plurality of support rods 3 with adjustable lengths. The length of the support rods 3 can be adjusted and abutted against the well wall to improve the stability of the fixed support of the support base 2. The sidewalls of the support base 2 are referred to as vertical plates 201, and the bottom wall thereof is referred to as horizontal plates 202.

[0046] like Figure 3 As shown, the support rod 3 includes a first screw 301 and a third threaded tube 302; one end of the first screw 301 is threadedly connected to the second threaded tube 2011 provided on the side wall of the support seat 2, and the other end thereof is threadedly connected to the third threaded tube 302; the third threaded tube 302 rotates along the first screw 301 to realize flexible adjustment of the length of the support rod 3; the support rod 3 is pressed against the wall of the fracturing well to support the side wall of the support seat 2.

[0047] The multiple mounting holes 2012 opened on the vertical plate 201 are used to fix the vertical plate 201 to the well wall by means of expansion bolts, and when the distance between one side of the vertical plate 201 and the well wall is large, one end of the first screw 301 is threadedly connected to the second threaded tube 2011, and the third threaded tube 302 is threadedly connected to the other end of the first screw 301, and then the third threaded tube 302 is rotated and adjusted so that the third threaded tube 302 is against the well wall to support the suspended part between the vertical plate 201 and the well wall, thereby improving the stability of the support base 2 after being fixed on the irregular well wall.

[0048] like Figure 2 、 5As shown in Figure 9, a plurality of legs 101 are fixedly installed on the bottom of the three-component seismic detector 1, and a first threaded tube 102 is fixedly installed at the center of the bottom; a second screw 401 threadedly connected to the first threaded tube 102 is coaxially fixed on the upper surface of the circular plate 4; a threaded hole 601 is provided on the upper surface of the plumb bob 6, and a third screw 501 is threadedly connected to the inner thread of the threaded hole 601, which is threadedly connected to the ball 5 through the third screw 501.

[0049] The first threaded tube 102 is threadedly connected to the second screw 401 to facilitate assembly and disassembly of the three-component seismic detector 1 and the placement circular plate 4. The third screw 501 is threadedly connected to the threaded hole 601 to facilitate assembly and disassembly of the plumb bob 6 and the ball 5.

[0050] like Figure 5 and 9 As shown, the length of the first threaded tube 102 is less than that of the support leg 101 ; therefore, when the three-component geophone 1 is used independently, the first threaded tube 102 will not affect the support of the three-component geophone 1 by the support leg 101 .

[0051] like Figure 1 - Figure 4 and Figure 8 As shown, the locking assembly includes a locking screw 702 and a rubber pressure head 703; the locking screw 702 is threadedly connected to one side of the ball sleeve 7 and is pressed against the ball 5 through the rubber pressure head 703; the rubber pressure head 703 slides in the receiving cavity 701 opened in the ball sleeve 7; the rubber pressure head 703 is structurally adapted to the receiving cavity 701.

[0052] Specifically, the locking screw 702 is threadedly connected to one side of the ball sleeve 7, and the rubber pressure head 703 is a cylindrical structure and is adapted to the storage cavity 701. When the circular plate 4 is automatically calibrated and placed, the locking screw 702 is adjusted so that the rubber pressure head 703 is stored in the storage cavity 701. After the automatic calibration is completed, the rubber pressure head 703 can fix the ball 5 and the ball sleeve 7 under the action of extrusion and / or friction.

[0053] like Figure 8 As shown, the end of the rubber pressing head 703 close to the ball 5 is an arc-shaped structure, and the arc surface of the rubber pressing head 703 fits the ball 5 to increase the contact area of ​​the rubber pressing head 703, thereby improving the fixing reliability of the rubber pressing head 703 and the ball 5.

[0054] like Figure 3 As shown, the bottom wall of the support seat 2 is provided with an operating port 2021 on the side away from the side wall; the ball sleeve 7 is fixed to the operating port 2021 by two connecting rods, and the side of the operating port 2021 away from the vertical plate 201 is an open structure, and the locking screw 702 is placed on the open side to facilitate the monitoring personnel to operate the locking screw 702.

[0055] like Figure 5 As shown, a universal level 8 is embedded in the upper surface of the circular plate 4 ; by observing the cavitation of the universal level 8 , the horizontal state of the circular plate 4 can be observed, and the horizontal state of the circular plate 4 can be observed during the process of passing the locking screw 702 .

[0056] Working principle:

[0057] First, a hole corresponding to the mounting hole 2012 is drilled in the well wall, and expansion bolts are used to fix the support plate to the well wall.

[0058] Next, when the well wall and the vertical plate 201 are suspended in the air, the third threaded tube 302 is rotated and adjusted to lengthen the support rod 3 so that the third threaded tube 302 at the end of the support rod 3 abuts against the well wall.

[0059] Then, under the action of the gravity of the plumb bob 6, the ball 5 rotates freely in the ball sleeve 7, and under the action of gravity, the axis of the placement circular plate 4 remains parallel to the plumb line, and the placement circular plate 4 is in a horizontal state.

[0060] Then, the locking screw 702 is rotated to squeeze the rubber pressure head 703 onto the ball 5, thereby completing the fixation of the ball 5 and the ball sleeve 7 and ensuring the fixation of the circular plate 4.

[0061] Finally, the first threaded tube 102 is connected to the thread of the second screw rod 401, and the support leg 101 of the three-component seismic detector 1 is placed on the circular plate 4; during the fracturing operation, the three-component seismic detector 1 captures seismic wave information, thereby realizing accurate positioning and monitoring of the fracturing cracks.

Claims

1. A fracturing downhole parameter monitoring device, comprising a three-component seismic detector (1) and a placement circular plate (4) that are detachably connected in sequence from top to bottom; characterized in that: Also includes: The support seat (2) has an L-shaped structure, wherein the side wall thereof is connected to the well wall of the fracturing well via bolts, and the middle portion of the bottom wall thereof is connected to the placement circular plate (4) via an automatic correction component; wherein the automatic correction component comprises: The ball sleeve (7) has an open structure at both ends, and its side wall is fixedly connected to the bottom wall of the support seat (2) via a connecting rod; A sphere (5) is rotatably arranged inside the ball sleeve (7), with its upper end connected to the placement circular plate (4) and its lower end detachably connected to a plumb bob (6), wherein the center of the placement circular plate (4), the center of the sphere (5) and the axis of the plumb bob (6) are collinearly arranged; A locking assembly is inserted into one side of the ball sleeve (7); the locking assembly is used to lock the relative position between the ball (5) and the ball sleeve (7).

2. The downhole fracturing parameter monitoring device according to claim 1, characterized in that: A plurality of legs (101) are fixedly mounted on the bottom of the three-component geophone (1), and a first threaded tube (102) is fixedly mounted at the center of the bottom. A second screw (401) threadedly connected to the first threaded tube (102) is coaxially fixed on the upper surface of the placement circular plate (4).

3. The downhole fracturing parameter monitoring device according to claim 2, characterized in that: The length of the first threaded tube (102) is smaller than the length of the supporting leg (101).

4. The downhole fracturing parameter monitoring device according to claim 2, characterized in that: The plumb bob (6) is threadably connected to the ball (5) via a third screw (501).

5. The downhole fracturing parameter monitoring device according to claim 1, characterized in that: The side wall of the support seat (2) is provided with a mounting hole (2012) for the bolt to pass through.

6. The downhole fracturing parameter monitoring device according to claim 5, characterized in that: The middle portion of the side wall of the support seat (2) abuts against the wall of the fracturing well via at least two support rods (3), wherein the support rods (3) include a first screw rod (301) and a third threaded tube (302); One end of the first screw rod (301) is threadedly connected to a second threaded tube (2011) provided on the side wall of the support seat (2), and the other end thereof is threadedly connected to the third threaded tube (302); The third threaded tube (302) rotates along the first screw (301) to achieve flexible adjustment of the length of the support rod (3); the support rod (3) rests against the wall of the fracturing well to achieve support for the side wall of the support seat (2).

7. The downhole fracturing parameter monitoring device according to claim 1, characterized in that: The locking assembly includes a locking screw (702) and a rubber pressure head (703); The locking screw (702) is threadedly connected to one side of the ball sleeve (7) and abuts against the ball (5) through the rubber pressure head (703); The rubber pressure head (703) slides in the receiving cavity (701) provided in the ball sleeve (7); the rubber pressure head (703) is structurally adapted to the receiving cavity (701).

8. The downhole fracturing parameter monitoring device according to claim 7, characterized in that: The end of the rubber pressure head (703) close to the ball (5) is an arc-shaped structure.

9. The downhole fracturing parameter monitoring device according to claim 8, characterized in that: An operating opening (2021) is provided on the bottom wall of the support seat (2) at a side away from the side wall.

10. The downhole fracturing parameter monitoring device according to claim 1, characterized in that: A universal level (8) is embedded in the upper surface of the placement circular plate (4).

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