Wobble wheel type hole drift angle sensing device and inclinometer

Abstract

The invention discloses a wobble wheel type hole drift angle sensing device and an inclinometer, belongs to the technical field of borehole measurement, and aims to solve the problem that the inclination angle measured by an existing inclinometer is small in range, the wobble wheel type hole drift angle sensing device comprises a mounting cylinder (5) and a regulating valve module (3), a wobble wheel module (4) is arranged in the mounting cylinder (5), and the wobble wheel module (4) is arranged in the regulating valve module (3). In the process that the mounting cavity (501) inclines relative to the vertical direction, the balance wheel (401) rotates by a corresponding angle along with the change of the inclination angle of the mounting cavity (501) under the action of gravity, and the push rod (403) correspondingly changes the opening degree of the adjusting valve module (3) according to the rotation angle of the balance wheel (401). When the mounting cavity can incline within the range of 0-90 degrees relative to the rotating shaft, the valve element can be effectively controlled by the balance wheel and the push rod, measurement of the whole hole deviation angle change range of 0-90 degrees is achieved, and large-range hole deviation signals can be sensed.

Description

Technical Field

[0001] The invention relates to the technical field of borehole measurement, in particular to a pendulum-type well inclination angle sensing device, and also to an inclinometer. Background Art

[0002] Inclinometers are essential tools in drilling projects, and are mainly divided into electronic and mechanical types. Due to the complex and changeable conditions downhole, mechanical inclinometers have the advantage of higher working reliability when facing harsh working conditions such as high temperature and high pressure.

[0003] The well inclination signal sensing device is the core component of the mechanical inclinometer, which is used to sense the well inclination and convert the well inclination into other signals for transmission to subsequent component modules until the well inclination signal is received and used by ground staff. For example, Chinese Patent Publication No. CN 111101861 A, published on May 5, 2020, discloses "A Well Inclination Signal Amplifier", which has a weight mechanism that swings down the lever mechanism after the well inclination changes, so that the long arm of the lever mechanism is lifted to realize the signal sensing, amplification and identification of small well inclination changes. Another example is Chinese Patent Publication No. CN1644874A, published on July 27, 2005, which discloses "A Mechanical Wireless Downhole Inclinometer", which relies on a pendulum-type mud pulse generator to generate different numbers of mud pulse signals to reflect well inclination parameters of different sizes.

[0004] The above-mentioned existing well inclination signal sensing devices are all "counterweight-long rod" pendulum-type sensing devices, which have a small swing range, resulting in a limited well inclination measurement range. Summary of the invention

[0005] In order to solve the problem that the inclination angle range measured by the above-mentioned inclinometer is small, the present invention provides a balance wheel type well inclination angle sensing device and an inclinometer. A balance wheel is used in the balance wheel type well inclination angle sensing device, so that when the installation cavity can be tilted within the range of 0°-90° relative to the rotating shaft, the balance wheel and the push rod can effectively control the valve core, realize the measurement of the entire well inclination angle variation range of 0°-90°, and can sense a wide range of well inclination signals.

[0006] The technical solution adopted by the embodiment of the present invention to solve the technical problem is:

[0007] A balance wheel type well inclination angle sensing device comprises an installation tube and a regulating valve module, wherein the installation tube contains an installation cavity, the installation cavity contains a swing wheel module and a first rotating shaft, the swing wheel module contains a balance wheel and a push rod, the first rotating shaft passes through the balance wheel, the first rotating shaft is in a horizontal state, the balance wheel can rotate around the first rotating shaft, the regulating valve module contains a valve core, one end of the push rod abuts against the outer peripheral surface of the balance wheel, and the other end of the push rod is connected to the valve core, when the installation cavity is tilted relative to the vertical direction, the balance wheel is affected by gravity and rotates a corresponding angle as the tilt angle of the installation cavity changes, and the push rod changes the opening of the regulating valve module accordingly according to the rotation angle of the balance wheel.

[0008] An inclinometer comprises a flow velocity detection device and the above-mentioned pendulum-type well inclination angle sensing device, wherein the flow velocity detection device is connected to a regulating valve module and can detect the flow velocity of a fluid flowing through the regulating valve module.

[0009] The beneficial effects of the embodiments of the present invention are:

[0010] 1. The installation tube and the regulating valve module are independently arranged, the interior of the installation cavity is sealed, and drilling fluid or mud cannot flow into it. The swing wheel module installed in the installation cavity works without interference, so as to realize a more stable and sensitive inclination sensing operation without hydraulic impact.

[0011] 2. The specifications of the installation cavity and the balance wheel are reasonably set so that when the installation cavity can be tilted within the range of 0°-90° relative to the first rotation axis, the balance wheel and the push rod can effectively control the valve core. Then, the balance wheel type well inclination angle sensing device can measure the entire well inclination angle variation range of 0°-90°, so that the balance wheel type well inclination angle sensing device can sense a wide range of well inclination signals.

[0012] 3. In addition, the well inclination sensing part and the flow control part of the balance wheel well inclination angle sensing device are separated, which provides a larger design and selection space for both to realize the manufacture of inclinometers with different performances and styles. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0014] Figure 1 It is a three-dimensional schematic diagram of the balance wheel type well inclination angle sensing device of the present invention.

[0015] Figure 2 It is a schematic diagram of the swing wheel module using a swing push rod cam.

[0016] Figure 3 This is a schematic diagram of the swing wheel module using equal-width cams.

[0017] Figure 4 This is a schematic diagram showing that the rotation radius of the eccentric weight portion is greater than the maximum radius of the cam.

[0018] Figure 5 It is a schematic diagram of the swing wheel module adopting the centrifugal constant velocity cam solution when the well inclination is 0°.

[0019] Figure 6 It is a schematic diagram of the swing wheel module adopting the centrifugal constant velocity cam solution when the well inclination is greater than 0° and less than 90°.

[0020] Figure 7 It is a schematic diagram of the swing wheel module adopting the offset cam solution when the well inclination is 0°.

[0021] Figure 8 It is a schematic diagram of the state of the swing wheel module adopting the offset cam solution when the well inclination is 90°.

[0022] Fig. 9 It is a cross-sectional schematic diagram of the balance wheel type well inclination angle sensing device of the present invention.

[0023] Fig.10 yes Fig. 9 An enlarged schematic diagram of the medium flow rate detection device.

[0024] Fig.11 Schematic diagram of the inclinometer of the present invention.

[0025] Fig.12 is a schematic diagram of the rotating bracket.

[0026] The following are the descriptions of the reference numerals:

[0027] 1. Drilling fluid flow channel; 2. Axial inner flow channel; 3. Regulating valve module; 4. Swing wheel module; 5. Mounting cylinder; 6. First rotating axis; 7. Second rotating axis; 8. Longitudinal axis weight platform; 9. Drilling tool outer cylinder; 10. Flow rate detection device; 11. Rotating bracket;

[0028] 301, valve seat; 302, valve core; 303, outlet; 304, inlet; 305, balance through hole;

[0029] 401, balance wheel; 402, weight portion; 403, push rod;

[0030] 501, installation cavity;

[0031] 801, a first radial weight-biasing portion; 802, a second radial weight-biasing portion;

[0032] 1001, hydraulic turbine; 1002, stopper; 1003, axial flow hole; 1004, housing; 1005, core barrel; 1006, annular outer flange;

[0033] 3021, core tube; 3022, end plate;

[0034] 4011, rotating shaft mounting hole; 4012, chord segment; 4013, arc segment; 4014, large semi - circular segment; 4015, straight segment; 4016, small semi - circular segment;

[0035] 10041, first housing; 10042, second housing;

[0036] 10051, first inner cylinder; 10052, second inner cylinder. Detailed implementation mode

[0037] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0038] For the convenience of understanding and description, an absolute position relationship is adopted in the following description of the present invention. Without special instructions, the orientation word "upper" represents Figure 7 the upper side direction in Figure 7 the orientation word "lower" represents Figure 7 the lower side direction in Figure 7 the orientation word "left" represents

[0039] a right - hand type well - deviation angle induction device, including an installation cylinder 5 and a regulating valve module 3. An installation cavity 501 is contained in the installation cylinder 5. A swing wheel module 4 and a first rotating shaft 6 are contained in the installation cavity 501. The swing wheel module 4 includes a swing wheel 401 and a push rod 403. The first rotating shaft 6 passes through the swing wheel 401. The first rotating shaft 6 is in a horizontal state. The swing wheel 401 can rotate around the first rotating shaft 6. The regulating valve module 3 includes a valve core 302. One end of the push rod 403 abuts against the outer peripheral surface of the swing wheel 401, and the other end of the push rod 403 is connected to the valve core 302. When the axis of the installation cavity 501 is inclined relative to the vertical direction, the swing wheel 401 is affected by gravity and rotates by a corresponding angle as the inclination angle of the installation cavity 501 changes. The push rod 403 correspondingly changes the opening degree of the regulating valve module 3 according to the rotation angle of the swing wheel 401.

[0040] Such as Figure 1As shown, the pendulum-type well inclination angle sensing device of the present invention can measure the well inclination angle in real time, and output the measured well inclination angle in the form of a change in the drilling fluid flow rate of the axial inner flow channel 2 described below, so as to realize the sensing of the well inclination signal. A turbine, flowmeter and other devices can be set in the axial inner flow channel 2 to identify the flow rate and transmit the signal to the ground. The mounting tube 5 and the regulating valve module 3 are separated and independently set at intervals. The mounting chamber 501 in the mounting tube 5 is a closed sealing structure, and the drilling fluid or mud cannot flow into it. The swing wheel module 4 installed in the mounting chamber 501 works undisturbed to realize a more stable and sensitive inclination sensing operation without hydraulic impact. In actual operation, the first rotating shaft 6 should be placed horizontally or nearly horizontally, and the pendulum 401 in the mounting chamber 501 can rotate freely around the first rotating shaft 6, and always point to the direction of gravity under the drive of the following eccentric weight 402. The device is installed in the drilling tool. When the installation tube 5 tilts with the drilling tool, the angle between the installation tube 5 and the valve seat 301 fixed relative to it and the pendulum 401 that always points to the direction of gravity changes. The change in this angle is the change in the well inclination. With the pendulum 401 that is always vertical as a reference, the installation tube 5 tilts with the drilling tool, which means that the installation tube 5 rotates relative to the first rotation axis 6. In this solution, when the installation tube 5 rotates around the first rotation axis 6: the deflection of the pendulum 401 in the swing wheel module 4 drives the valve core 302 to move through the push rod 403, so as to change the opening of the regulating valve module 3 and control the flow of the axial inner flow channel 2. Reasonable setting of the specifications of the installation cavity 501 and the balance wheel 401, so that the installation cavity 501 can be tilted within the range of 0°-90° relative to the first rotating shaft 6, can realize the effective control of the balance wheel 401 and the push rod 403 on the valve core 302. For example, if the minimum internal diameter of the installation cavity 501 is greater than the maximum rotating diameter of the balance wheel 401, the device can realize the measurement of the entire well inclination angle variation range of 0°-90°, so that the device can sense a wide range of well inclination signals. Different from the prior art, the well inclination sensing part (swing wheel module 4 and installation tube 5) and the flow control part (regulating valve module 3) of this solution are separated, giving the two a larger design and selection space to realize the manufacture of inclinometers with different performances and styles. For example, in some embodiments, the regulating valve module 3 can select a straight-through single-seat throttling regulating valve, the valve stem of the valve core 302 of which is fixedly connected to the push rod 403 of the balance wheel 401, and the inlet and outlet of the valve seat 301 are respectively connected to the drilling fluid flow channel 1 and the axial inner flow channel 2; the valve core 302 selects a window-type valve flap or a plug-shaped valve flap with a specific shape, and the valve flap makes the flow change rate of the regulating valve different in different opening intervals: for example, the first push stroke and the second push stroke distance corresponding to the first inclination measuring interval and the second inclination measuring interval are the same, and the regulating valve module 3 is set so that the flow increment of the regulating valve in the first push stroke interval is greater than the flow increment of the regulating valve in the second push stroke interval, then the present device will have a technical effect of being more sensitive to well inclination in the first inclination measuring interval than in the second inclination measuring interval.In other embodiments, the regulating valve module 3 can be in the form of an angular stroke valve such as a ball valve and a butterfly valve. The end of the push rod 403 is rotatably connected to the ball valve core 302 and the butterfly valve plate. The linear movement of the push rod 403 causes the valve core 302 to rotate, thereby achieving the flow regulation effect of the regulating valve module 3.

[0041] For example, Figure 2 As shown, in some embodiments, a swinging push rod 403 transmission method can also be adopted, and the relative rotation of the balance wheel 401 causes the push rod 403 to swing, and the swinging push rod 403 then drives the valve core 302 to rotate to achieve flow regulation. Figure 3 As shown, in some embodiments, the inner wall of the installation cavity 501 can directly contact the contour of the balance wheel 401 to form a geometrically closed equal-width balance wheel 401 structure, and the push rod 403 is fixedly arranged on the outer side of the installation cavity 501 and extends toward the regulating valve module 3. In this embodiment, the push rod 403 does not need to pass through the cavity wall of the installation cavity 501, so that the sealing inside the installation cavity 501 is better.

[0042] When the installation cavity 501 is tilted relative to the vertical direction (that is, the angle between the installation cavity and the vertical direction becomes larger, that is, the well inclination angle becomes larger), the rotation angle of the balance wheel 401 is proportional to the tilt angle of the installation cavity 501, and a roller is provided at one end of the push rod 403. One end of the push rod 403 is in contact with the outer peripheral surface of the balance wheel 401 through the roller. The axis of the roller is parallel to the axis of the first rotating shaft 6. The distance moved by the push rod 403 is proportional to the rotation angle of the balance wheel 401. The opening of the regulating valve module 3 is proportional or inversely proportional to the distance moved by the push rod 403, that is, the opening of the regulating valve module 3 is proportional or inversely proportional to the rotation angle of the balance wheel 401.

[0043] like Figure 4-Figure 8 As shown, the outer peripheral surface of the balance wheel 401 contains a control curve segment. When the push rod 403 moves from the first end point of the control curve segment to the second end point of the control curve segment, the regulating valve module 3 changes monotonically from the minimum opening to the maximum opening, or the regulating valve module 3 changes monotonically from the maximum opening to the minimum opening. When the push rod 403 in the device rotates relative to the balance wheel 401 in the control curve segment, its rotation angle corresponds to the opening size of the regulating valve. Each well inclination angle sensed by the device enables the regulating valve module 3 to output a corresponding, unique and determined flow size, so that the measured well inclination angle size can be determined by the flow size. In some embodiments, the control curve segment is avoided to have a rest section where the radius of the balance wheel 401 remains unchanged. In this unfavorable situation, the push rod 403 rotates relative to the balance wheel 401 while the push distance remains unchanged, and the well inclination angle cannot be measured.

[0044] For example, the mounting tube 5 and the regulating valve module 3 are arranged up and down, and the cross section of the balance wheel 401 is an arched structure. When the mounting cavity 501 is tilted relative to the vertical direction, the opening of the regulating valve module 3 is proportional to the rotation angle of the balance wheel 401. The balance wheel 401 contains a shaft mounting hole 4011, and the first rotating shaft 6 passes through the shaft mounting hole 4011. The outer peripheral surface of the balance wheel 401 contains a chord segment 4012 and an arc segment 4013. The shaft mounting hole 4011 is located between the center of the circle corresponding to the arc segment 4013 and the chord segment 4012. The push rod 403 extends along the axis direction of the mounting tube 5. The axis of the push rod 403 intersects and is perpendicular to the axis of the first rotating shaft 6. One end of the push rod 403 abuts against the arc segment 4013 on the outer peripheral surface of the balance wheel 401.

[0045] like Figure 5-Figure 6 As shown, the push rod 403 and the valve core 302 are fixedly connected, and the valve core 302 moves linearly relative to the valve seat 301; the profile of the balance wheel 401 of the control curve section satisfies the law of isokinetic motion of the push rod 403, and the inherent valve characteristic of the regulating valve module 3 is a linear characteristic. The profile of the balance wheel 401 of the control curve section is set to satisfy the law of isokinetic motion, so that the angle of rotation of the push rod 403 relative to the balance wheel 401 and the distance moved by the push rod 403 are in a linear relationship, and then the inherent valve characteristic of the regulating valve module 3 is set to a linear characteristic, then the moving distance of the push rod 403 and the change in flow regulation are also in a linear relationship. At this time, the well inclination angle measured by the sensing device is linearly and one-to-one corresponding to the flow rate in the axial inner flow channel 2, and the change in flow rate is completely consistent with the change in well inclination, and the sensed well inclination signal sensing form is more intuitive and clear.

[0046] like Figure 5-Figure 6As shown, the balance wheel 401 is a plane balance wheel 401, and the push rod 403 is arranged concentrically with the balance wheel 401; the center of mass of the balance wheel 401 deviates from the first rotation axis 6 of the balance wheel 401 to form the eccentric weight part 402, and the center of mass deviates toward the direction of the maximum diameter part of the balance wheel 401; when the mounting tube 5 is in a vertical state, the maximum diameter part of the balance wheel 401 abuts against the push rod 403, and the abutment point of the push rod 403, the center of mass of the balance wheel 401, and the rotation center of the balance wheel 401 are collinear; when the mounting tube 5 is horizontal, the minimum diameter part of the balance wheel 401 abuts against the push rod 403. This provides a specific implementation between the push rod 403 and the balance wheel 401. If the push rod 403 of the device is coaxially positioned and installed with the drilling tool, in this solution, the maximum diameter part of the balance wheel 401 abuts against the push rod 403 when the well inclination angle is 0°; and the minimum diameter part of the balance wheel 401 abuts against the push rod 403 when the well inclination angle is 90°. Since the push rod 403 and the balance wheel 401 are arranged concentrically, the axial unbalanced force generated by the valve core 302 will be directly transmitted to the first rotating shaft 6, the rotation center of the balance wheel 401, through the push rod 403 and the balance wheel 401, to avoid the axial unbalanced force and the first rotating shaft 6 offset to cause the generation of rotation torque and affect the free deflection of the balance wheel 401 under the action of the gravity torque. In addition, the maximum diameter part and the minimum diameter part of the balance wheel 401 correspond to the well inclination angle of 0° and the well inclination angle of 90° respectively. This feature means that each diameter value between the maximum and minimum of the balance wheel 401 corresponds to a well inclination angle, and the balance wheel 401 has a compact structure.

[0047] like Figure 5-Figure 6 As shown, in the above-mentioned embodiment, when the well inclination angle is 0°, the push rod 403 abuts against the maximum diameter part of the balance wheel 401, and when the well inclination angle is 0°, the maximum diameter part of the balance wheel 401 is located at the lowest point of the balance wheel 401, and the push rod 403 is below the balance wheel 401. In order to enable the push rod 403 to maintain abutment with the balance wheel 401 at this time, it is configured as follows: the push rod 403 is connected to the mounting tube 5 through a spring, and the push rod 403 achieves real-time abutment with the balance wheel 401 through the spring.

[0048] Alternatively, the mounting tube 5 and the regulating valve module 3 are arranged up and down, the cross section of the balance wheel 401 is a water drop structure, and the balance wheel 401 can also be called a cam. When the mounting cavity 501 is tilted relative to the vertical direction, the opening of the regulating valve module 3 is inversely proportional to the rotation angle of the balance wheel 401. The balance wheel 401 contains a shaft mounting hole 4011, and the first rotating shaft 6 passes through the shaft mounting hole 4011. The outer peripheral surface of the balance wheel 401 contains a large semicircle line segment 4014, a straight line segment 4015 and a small semicircle line segment 4016 connected in sequence. The shaft mounting hole 4011 is located at the center of the circle corresponding to the small semicircle line segment 4016. The push rod 403 extends along the axis direction of the mounting tube 5, and the axis of the push rod 403 deviates from the axis of the first rotating shaft 6. One end of the push rod 403 abuts against the straight line segment 4015 and the small semicircle line segment 4016 on the outer peripheral surface of the balance wheel 401.

[0049] The swing wheel module 4 further includes a weighted portion 402, which is connected to the outer circumference or outer end surface of the balance wheel 401; when the weighted portion 402 is connected to the outer circumference of the balance wheel 401, the rotation radius of the weighted portion 402 is greater than the maximum radius of the balance wheel 401, such as Figure 4 By setting the rotation radius of the eccentric weight part 402 to be larger than the maximum radius of the balance wheel 401, the eccentric weight part 402 can generate a larger deflection torque, so that the balance wheel 401 can be more stably kept pointing in the direction of the gravity line.

[0050] When the eccentric weight part 402 is connected to the outer end surface of the balance wheel 401, the center of gravity of the eccentric weight part 402 corresponds to the center of gravity of the balance wheel 401 along the axial direction of the first rotating shaft 6. Figure 1 and Fig.10 As shown. The balance wheel 401 is a plane balance wheel 401, the first rotating shaft 6 coincides with the center of the circle of the smallest diameter part of the balance wheel 401, and the center of the circle of the largest diameter part of the balance wheel 401 bulges outward to form the eccentric weight part 402. This technical feature sets the eccentric weight part 402 and the balance wheel 401 as a whole, that is, the eccentric weight part 402 and the balance wheel 401 are integrated, and the counterweight of the eccentric weight part 402 is fixedly set on the side with a larger radius of the balance wheel 401. This setting method can make the structure of the balance wheel 401 more compact. The advantages of the irregular shape of the balance wheel 401 are fully utilized, so that the balance wheel 401 can not only use the profile surface for guidance, but also reasonably set the relative position between the profile of the balance wheel 401 and the rotating axis, so that the balance wheel 401 can generate a large eccentric weight torque without additionally setting a separate eccentric weight part 402.

[0051] The mounting tube 5 is a cylindrical structure with both ends closed, and the push rod 403 passes through one end of the mounting tube 5. The regulating valve module 3 also includes a valve seat 301. The valve seat 301 is a cylindrical structure. The valve seat 301 is sleeved outside the valve core 302. One end of the valve seat 301 is connected to one end of the mounting tube 5, and the other end of the valve seat 301 is an inlet 304. An outlet 303 is arranged on the side wall of the valve seat 301.

[0052] The valve core 302 is a cylindrical structure with one end closed. The closed end of the valve core 302 faces one end of the mounting tube 5, and the open end of the valve core 302 faces the inlet 304 of the valve seat 301. The valve core 302 contains a core tube 3021 and an end plate 3022 connected in sequence. The core tube 3021 is sealed and connected to the valve seat 301. The other end of the push rod 403 is connected and fixed to the end plate 3022. A balancing through hole 305 is provided on the end plate 3022. The push rod 403 moves a corresponding distance along the axial direction of the mounting tube 5 according to the rotation angle of the balance wheel 401, and changes the flow area of ​​the outlet 303 accordingly.

[0053] like Figure 5-Figure 8 As described, one end of the valve seat 301 is fixedly connected to the installation cavity 501, and the other end of the valve seat 301 is connected to the axial inner flow channel 2. The cylindrical surface of the valve seat 301 is provided with an outlet 303 connected to the drilling fluid flow channel 1, and the axial end surface of the valve seat 301 is provided with an inlet 304 connected to the axial inner flow channel 2. This provides a specific implementation of the regulating valve module 3, that is, a sleeve valve is adopted, and the sleeve valve is accurately guided in a straight line, which can ensure the coaxiality of the valve core 302 and the valve seat 301. At the same time, in actual drilling tools, the drilling fluid flow channel 1 is usually an annular flow channel, and the outlet 303 is opened on the cylindrical surface of the valve seat 301, which facilitates the drilling fluid in the drilling fluid flow channel 1 to flow into and out of the regulating valve module 3, reducing the flow resistance. At the same time, the drilling fluid flows into the chamber of the sleeve valve from the cylindrical surface circumference at the same time, and the liquids with different phase angles enter and collide with each other, reducing the hydraulic impact on the valve core 302 and the valve stem.

[0054] like Figure 1 , Figure 7-Figure 11 As shown, the valve core 302 moves linearly relative to the valve seat 301, the valve core 302 is located on the upper side of the balance wheel 401, the axial inner flow channel 2 is located on the upper side of the balance wheel 401, and the valve core 302 is provided with a balancing through hole 305. This technical feature provides an arrangement of the axial inner flow channel 2, the control valve module, and the swing wheel module 4. Since the valve core 302 is located on the upper side of the balance wheel 401 and the push rod 403 is also located on the upper side of the balance wheel 401, the gravity of the valve core 302 itself can achieve the force closure between the balance wheel 401 and the push rod 403. When the control valve module adopts the aforementioned sleeve valve solution, in this solution, the balancing through hole 305 is provided on the valve core 302 to reduce the unbalanced force on the valve core 302. When the balance wheel 401 deflects, the force acting on the push rod 403 only needs to be mainly used to overcome the gravity and friction of the valve core 302, so that the push of the push rod 403 by the balance wheel 401 is more sensitive. In this solution, the installation cavity 501 should be provided with an opening and a matching sealing structure to allow the push rod 403 to pass through the inside and outside of the installation cavity 501 .

[0055] The other end of the mounting tube 5 is connected in sequence with a longitudinal axis weighting platform 8 and a second rotating axis 7. The axis of the second rotating axis 7 coincides with the axis of the mounting tube 5. The longitudinal axis weighting platform 8 contains a first radial weighting portion 801 and a second radial weighting portion 802 distributed along the circumference of the second rotating axis 7. The weight of the second radial weighting portion 802 is greater than that of the first radial weighting portion 801. The longitudinal axis weighting platform 8 can rely on gravity to rotate the mounting tube 5 around the second rotating axis 7 and make the first rotating axis 6 horizontal.

[0056] The second rotating shaft 7 may be provided with a rotating bracket 11. Fig.12 As shown, the rotating bracket 11 includes an inner ring and an outer rod, the second rotating shaft 7 is inserted into the inner ring of the rotating bracket 11, the inner end of the outer rod is connected and fixed to the inner ring, and the outer end of the outer rod can abut against the inner surface of the drilling tool outer cylinder 9. The rotating bracket 11 has a straightening effect, which can make the axis of the second rotating shaft 7 coincide with the axis of the drilling tool outer cylinder 9.

[0057] like Figure 1 , Figure 7-Figure 11As shown, the second rotating shaft 7 is perpendicular to the first rotating shaft 6, and the longitudinal axis eccentric weighting platform 8 has a first radial eccentric weighting portion 801 and a second radial eccentric weighting portion 802 which are distributed circumferentially with the second rotating shaft 7 as the center. When the second rotating shaft 7 is tilted: the second radial eccentric weighting portion 802 generates a large eccentric weighting moment to drive the longitudinal axis eccentric weighting platform 8 to deflect; the push rod 403 is eccentrically arranged with the balance wheel 401, and the first rotating shaft 6 is located on the side close to the first radial eccentric weighting portion 801 relative to the second rotating shaft 7, and the movement axis of the push rod 403 coincides with the second rotating shaft 7. This technical feature provides another specific implementation of the device. During actual installation, the longitudinal axis eccentric weighting platform 8 should be arranged parallel to the drilling tool routing. When in the well inclination section, the second rotating shaft 7 is tilted. Under the action of the deflection moment, the second radial eccentric weighting portion 802 will always swing toward the lower side of the wellbore until it stabilizes at the bottom edge of the wellbore. In this field, the bottom of a drilling well is a circular plane in an inclined state, which is called the bottom circle of the well. The highest point on the bottom circle of the well is called the high side, and the lowest point is called the low side. When the deflection of the longitudinal axis eccentric weight platform 8 stops, the first rotating axis 6 is horizontal, and the eccentric weight balance wheel 401 will always deflect to the side of the low side, that is, the side of the second radial eccentric weight portion 802, that is, in the plane perpendicular to the first drilling axis, if the XY coordinate axis is established with the first rotating axis 6 as the origin, the swing range of the eccentric weight balance wheel 401 is limited to one of the quadrants. Due to the limited space of the mounting cavity 501, in the present technical feature, the push rod 403 and the balance wheel 401 are eccentrically arranged, so that the balance wheel 401 is offset toward the first radial eccentric weight portion 801, that is, the high side of the wellbore, so that a balance wheel 401 with a larger radius can be arranged in the limited space of the mounting cavity 501. The balance wheel 401 with a larger radius can provide a larger deflection torque, and the balance wheel 401 with a larger base circle can reduce the pressure angle and improve the stress condition of the push rod 403. Secondly, in some embodiments, the push rod 403 is offset to the right side of the axis of the balance wheel 401 when it is deflected clockwise, which can also reduce the pressure angle, so that the balance wheel 401 pushes the push rod 403 more easily and sensitively when the weight is swinging. In some embodiments, in order to make the second radial weighting part 802 produce a larger deflection torque, the volume of the second radial weighting part 802 can be set larger than the first radial weighting part 801, or the second radial weighting part 802 can be made of a material with a higher density. In this solution, the movement axis of the push rod 403 is also defined as coinciding with the second rotation axis 7. This feature enables the push rod 403 to be at the center of the axis without or with a smaller momentum when the longitudinal axis weighting platform 8 drives the entire installation cavity 501 and its fixed regulating valve module 3 and swing wheel module 4 to rotate around the second rotation axis 7, and the push rod 403 is not easy to shake and is more stable.

[0058] An inclinometer is introduced below, including a flow velocity detection device 10 and the above-mentioned pendulum-type well inclination angle sensing device. The flow velocity detection device 10 is connected to the regulating valve module 3, and the flow velocity detection device 10 can detect the flow velocity of the fluid flowing through the regulating valve module 3.

[0059] The flow rate detection device 10 comprises a core barrel 1005 and a shell 1004 which are arranged inside and outside. The core barrel 1005 comprises an axial inner flow channel 2, and the axial inner flow channel 2 comprises a hydraulic turbine 1001. The axial inner flow channel 2 is connected with the inlet 304 of the regulating valve module 3. The hydraulic turbine 1001 is fixedly connected with the core barrel 1005. When fluid passes through the axial inner flow channel 2, the fluid can drive the core barrel 1005 to rotate around the axis of the core barrel 1005 through the hydraulic turbine 1001. The outer surface of the shell 1004 comprises an annular outer flange 1006, and an axial flow hole 1003 is arranged in the annular outer flange 1006. A stopper 1002 is arranged outside the core barrel 1005. The stopper 1002 is stacked and connected with the annular outer flange 1006, and the stopper 1002 can periodically block the axial flow hole 1003. For example, three axial flow holes 1003 are provided in the annular outer flange 1006, and the three axial flow holes 1003 are evenly spaced and arranged along the circumference of the annular outer flange 1006, and the size and shape of the stopper 1002 and one axial flow hole 1003 are substantially the same. When the core barrel 1005 rotates relative to the housing 1004, the stopper 1002 can periodically change the flow area of ​​the axial flow hole 1003.

[0060] The outer shell 1004 comprises a first shell 10041 and a second shell 10042 which are arranged in sequence along the axial direction. The core tube 1005 comprises a first inner tube 10051 and a second inner tube 10052 which are connected in sequence along the axial direction. The first inner tube 10051 is sleeved in the first shell 10041. A first bearing is connected between the first inner tube 10051 and the first shell 10041. The second inner tube 10052 is sleeved in the second shell 10042. A second bearing is connected between the second inner tube 10052 and the second shell 10042. One end of the second inner tube 10052 is plugged into the first inner tube 10051. The hydraulic turbine 1001 is fixed in one end of an inner cylinder 10051, and one end of the first shell 10041 is connected to the regulating valve module 3. The other end of the first shell 10041 faces one end of the second shell 10042. The annular outer flange 1006 is located outside one end of the second shell 10042. The stopper 1002 is located between the first shell 10041 and the second shell 10042. The stopper 1002 is located outside one end of the first inner cylinder 10051, and an anti-slip structure is provided between the first inner cylinder 10051 and the first shell 10041.

[0061] like Figure 9-11As shown, the axial flow hole 1003 is arranged in the annular drilling fluid flow channel 1. When the hydraulic turbine 1001 drives the block 1002 to rotate, the rotating block 1002 can periodically block the axial flow hole 1003, thereby changing the flow area of ​​the drilling fluid flow channel 1. Since the well inclination signal sensing device can sense the well inclination and output the well inclination in the form of a change in the flow velocity of the axial inner flow channel 2, in the inclinometer provided by this scheme, the fluid in the axial inner flow channel 2 will drive the hydraulic turbine 1001 and the core barrel 1005 to rotate synchronously. Due to the different drilling fluid flow rates in the axial inner flow channel 2, the rotation speed of the hydraulic turbine 1001 will also change, and the speed at which the hydraulic turbine 1001 drives the block 1002 to rotate and block the axial flow hole 1003 will change. The drilling fluid in the outer annular drilling fluid flow channel 1 needs to pass through the flow hole. According to the small hole flow theory, the change of the flow hole area can generate different pressure pulse signals. The ground can determine the change of drilling parameters according to the change of the pressure pulse signal of the mud in the well, thereby achieving the functional effect of measuring the size of the well deviation.

[0062] The working process of the balance wheel type well inclination angle sensing device and the inclinometer is introduced below.

[0063] The inclinometer is lowered into the well through the drill tool outer tube 9, and the outer peripheral surface of the annular outer flange 1006 is connected to the inner surface of the drill tool outer tube 9. The inclinometer is located in the annular drilling fluid flow channel 1. When the axis of the installation cavity 501 is tilted relative to the vertical direction, the balance wheel 401 rotates a corresponding angle as the tilt angle of the installation cavity 501 changes due to the action of gravity, and the push rod 403 moves a corresponding distance along the axis direction of the installation tube 5 according to the rotation angle of the balance wheel 401. The push rod 403 changes the opening of the regulating valve module 3 accordingly according to the rotation angle of the balance wheel 401. The drilling fluid flows downward, and a part of the drilling fluid flows through the axial inner flow channel 2 and the regulating valve module 3 (also called the regulating valve) in sequence, and another part of the drilling fluid flows through the axial flow hole 1003.

[0064] The fluid in the axial inner flow channel 2 will drive the hydraulic turbine 1001 and the core barrel 1005 to rotate synchronously. Due to the different drilling fluid flow rates in the axial inner flow channel 2, the rotation speed of the hydraulic turbine 1001 will also change, and the speed at which the hydraulic turbine 1001 drives the block 1002 to rotate and block the axial flow hole 1003 will change. The drilling fluid in the outer annular drilling fluid flow channel 1 needs to pass through the flow hole. According to the small hole flow theory, the change in the flow hole area can generate different pressure pulse signals. The ground can determine the change in drilling parameters according to the change in the pressure pulse signal of the mud in the well. This achieves the functional effect of measuring the size of the well deviation.

[0065] The above is only a specific embodiment of the present invention, and cannot be used to limit the scope of the invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the patent of the present invention, should still fall within the scope of this patent. In addition, the technical features of the present invention can be freely combined with each other, with technical features and technical solutions, with technical solutions and embodiments.

Claims

1. A pendulum-type well inclination angle sensing device, characterized in that: The balance wheel type well inclination angle sensing device comprises a mounting tube (5) and a regulating valve module (3), wherein the mounting tube (5) contains a mounting cavity (501), wherein the mounting cavity (501) contains a swing wheel module (4) and a first rotating shaft (6), wherein the swing wheel module (4) contains a balance wheel (401) and a push rod (403), wherein the first rotating shaft (6) passes through the balance wheel (401), wherein the first rotating shaft (6) is in a horizontal state, wherein the balance wheel (401) can rotate around the first rotating shaft (6), and wherein the regulating valve module (3) contains a valve core (302), one end of the push rod (403) is in contact with the outer peripheral surface of the balance wheel (401), and the other end of the push rod (403) is connected to the valve core (302). When the installation cavity (501) is tilted relative to the vertical direction, the balance wheel (401) is affected by gravity and rotates to a corresponding angle as the tilt angle of the installation cavity (501) changes. The push rod (403) changes the opening of the regulating valve module (3) accordingly according to the rotation angle of the balance wheel (401).

2. The balance wheel type well inclination angle sensing device according to claim 1, characterized in that: When the installation cavity (501) is tilted relative to the vertical direction, the rotation angle of the balance wheel (401) is proportional to the tilt angle of the installation cavity (501), and the opening of the regulating valve module (3) is proportional or inversely proportional to the rotation angle of the balance wheel (401).

3. The balance wheel type well inclination angle sensing device according to claim 2, characterized in that: The mounting cylinder (5) and the regulating valve module (3) are arranged vertically, and the cross section of the balance wheel (401) is an arched structure. When the mounting cavity (501) is tilted relative to the vertical direction, the opening of the regulating valve module (3) is proportional to the rotation angle of the balance wheel (401).

4. The balance wheel type well inclination angle sensing device according to claim 3 is characterized in that: The balance wheel (401) contains a shaft mounting hole (4011), the first rotating shaft (6) passes through the shaft mounting hole (4011), the outer peripheral surface of the balance wheel (401) contains a chord segment (4012) and an arc segment (4013), the shaft mounting hole (4011) is located between the center of the circle corresponding to the arc segment (4013) and the chord segment (4012), the push rod (403) extends along the axial direction of the mounting tube (5), the axis of the push rod (403) intersects and is perpendicular to the axis of the first rotating shaft (6), and one end of the push rod (403) abuts against the arc segment (4013) on the outer peripheral surface of the balance wheel (401).

5. The balance wheel type well inclination angle sensing device according to claim 2, characterized in that: The mounting cylinder (5) and the regulating valve module (3) are arranged up and down, and the cross section of the balance wheel (401) is in a water drop structure. When the mounting cavity (501) is tilted relative to the vertical direction, the opening of the regulating valve module (3) is inversely proportional to the rotation angle of the balance wheel (401).

6. The balance wheel type well inclination angle sensing device according to claim 5, characterized in that: The balance wheel (401) contains a shaft mounting hole (4011), the first rotating shaft (6) passes through the shaft mounting hole (4011), the outer circumference of the balance wheel (401) contains a large semicircular line segment (4014), a straight line segment (4015) and a small semicircular line segment (4016), the shaft mounting hole (4011) is located at the center of the circle corresponding to the small semicircular line segment (4016), the push rod (403) extends along the axial direction of the mounting tube (5), the axis of the push rod (403) deviates from the axis of the first rotating shaft (6), and one end of the push rod (403) abuts against the straight line segment (4015) and the small semicircular line segment (4016) on the outer circumference of the balance wheel (401).

7. The balance wheel type well inclination angle sensing device according to claim 1, characterized in that: The oscillating wheel module (4) further comprises a weighted portion (402), and the weighted portion (402) is connected to the outer peripheral surface or outer end surface of the oscillating wheel (401); When the weighted portion (402) is connected to the outer peripheral surface of the balance wheel (401), the rotation radius of the weighted portion (402) is greater than the maximum radius of the balance wheel (401); When the eccentric weight part (402) is connected to the outer end surface of the balance wheel (401), the center of gravity of the eccentric weight part (402) corresponds to the center of gravity of the balance wheel (401) along the axial direction of the first rotating shaft (6).

8. The balance wheel type well inclination angle sensing device according to claim 1, characterized in that: The mounting tube (5) is a cylindrical structure with both ends closed, and the push rod (403) passes through one end of the mounting tube (5). The regulating valve module (3) also includes a valve seat (301). The valve seat (301) is a cylindrical structure. The valve seat (301) is sleeved outside the valve core (302), one end of the valve seat (301) is connected to one end of the mounting tube (5), the other end of the valve seat (301) is an inlet (304), and an outlet (303) is provided on the side wall of the valve seat (301).

9. The balance wheel type well inclination angle sensing device according to claim 8, characterized in that: The valve core (302) is a cylindrical structure with one end closed. The valve core (302) includes a core tube (3021) and an end plate (3022) connected in sequence. The core tube (3021) is sealed and connected to the valve seat (301). The other end of the push rod (403) is connected and fixed to the end plate (3022). A balancing through hole (305) is provided on the end plate (3022). The push rod (403) moves a corresponding distance along the axial direction of the mounting tube (5) according to the rotation angle of the balance wheel (401), and changes the flow area of ​​the outlet (303) accordingly.

10. The balance wheel type well inclination angle sensing device according to claim 8, characterized in that: The other end of the mounting tube (5) is connected in sequence to a longitudinal axis weighting platform (8) and a second rotating axis (7), the axis of the second rotating axis (7) coincides with the axis of the mounting tube (5), the longitudinal axis weighting platform (8) comprises a first radial weighting portion (801) and a second radial weighting portion (802) distributed along the circumference of the second rotating axis (7), the weight of the second radial weighting portion (802) being greater than the weight of the first radial weighting portion (801), and the longitudinal axis weighting platform (8) can rely on gravity to rotate the mounting tube (5) around the second rotating axis (7) and to make the first rotating axis (6) in a horizontal state.

11. An inclinometer, characterized in that: The inclinometer comprises a flow rate detection device (10) and the pendulum-type well inclination angle sensing device according to claim 1, wherein the flow rate detection device (10) is connected to the regulating valve module (3), and the flow rate detection device (10) can detect the flow rate of the fluid flowing through the regulating valve module (3).

12. The inclinometer according to claim 11, characterized in that The flow rate detection device (10) comprises a core barrel (1005) and a shell (1004) which are arranged inside and outside. The core barrel (1005) comprises an axial inner flow channel (2). The axial inner flow channel (2) comprises a hydraulic turbine (1001). The axial inner flow channel (2) is connected to an inlet (304) of a regulating valve module (3). The hydraulic turbine (1001) is connected and fixed to the core barrel (1005). The outer surface of the shell (1004) comprises an annular outer flange (1006). An axial flow hole (1003) is provided inside the outer flange (1006), and a stopper (1002) is provided outside the core tube (1005). The stopper (1002) is stacked and connected with the annular outer flange (1006). The stopper (1002) can block the axial flow hole (1003). When the core tube (1005) rotates relative to the outer shell (1004), the stopper (1002) can periodically change the flow area of ​​the axial flow hole (1003).

13. The inclinometer according to claim 11, characterized in that The outer shell (1004) comprises a first shell (10041) and a second shell (10042) which are arranged in sequence along the axial direction at intervals. The core tube (1005) comprises a first inner tube (10051) and a second inner tube (10052) which are connected in sequence along the axial direction. The first inner tube (10051) is sleeved in the first shell (10041). A first bearing is connected between the first inner tube (10051) and the first shell (10041). The second inner tube (10052) is sleeved in the second shell (10042). The second inner tube (10052) and the second shell (10042) are connected to each other. ), one end of the second inner cylinder (10052) is inserted into one end of the first inner cylinder (10051), the hydraulic turbine (1001) is fixed in one end of the second inner cylinder (10052), one end of the first shell (10041) is connected to the regulating valve module (3), the other end of the first shell (10041) faces one end of the second shell (10042), the annular outer flange (1006) is located outside one end of the second shell (10042), and the stopper (1002) is located between the first shell (10041) and the second shell (10042).

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