A displacement control device, a mud generator, a drilling system and applications thereof
By designing a displacement control device to dynamically adjust the displacement of the mud generator, the problem of the narrow applicability of the mud generator was solved, and a stable power supply for downhole tools was achieved.
Patent Information
- Application Number
- CN202210899025.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-07-28
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2042-07-28
AI Technical Summary
The applicable displacement range of mud generators is relatively narrow, which leads to unstable power supply to downhole tools and equipment, especially under high power conditions, where problems such as excessively high or low voltage are likely to occur.
A discharge control device was designed, including a flow sleeve and a discharge adjustment component. By adjusting the axial movement of the valve core in the overflow channel, the discharge volume of the mud can be dynamically adjusted, thus broadening the applicable range and buffering discharge fluctuations.
It improves the working stability of downhole tools, expands the applicable displacement range of mud generators, reduces the impact of displacement fluctuations on tools, and ensures the stability of power supply.
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Figure CN116498483B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of drilling technology, in particular to a displacement regulating device, a mud generator, a drilling system and application thereof. BACKGROUND
[0002] In the development process of the oil industry, downhole intelligent control technology is a main direction of the current engineering technology development, and the power supply mode generally adopts a mud generator for power supply. The power generation of the mud generator is directly related to the displacement passing through the turbine of the mud generator, and the power generation is very sensitive to the displacement change, and is easily affected by factors such as pulse sending, mud performance and working condition. The change of the power generation easily causes the power supply voltage to be unstable, especially when a high-power mud generator is used as a power supply, the mud generator is prone to have a narrow applicable displacement range, that is, when the displacement is low, the power generation of the mud generator is insufficient, resulting in that the tool equipment relying on the mud generator cannot work normally; when the displacement is high, the power generation of the mud generator is too high, and the voltage of the high-power mud generator is difficult to be regulated by the electronic circuit, resulting in that the voltage of the circuit board supplied to the tool equipment is too high and the circuit high-voltage protection is performed. The displacement range corresponding to the above two situations is very small, resulting in that the downhole tool equipment using the mud generator as a power source has a narrow applicable displacement range, which is called a narrow working window tool.
[0003] The narrow working window tool can work normally within the applicable displacement range, but as the well depth, mud performance, temperature, pulse sending and other factors affect the tool applicable displacement, the tool applicable displacement continuously deviates and the tool applicable displacement range continuously decreases, eventually resulting in that the tool equipment cannot work normally. Therefore, widening the applicable displacement range of the tool equipment as much as possible and reducing the influence of the displacement fluctuation as much as possible are the keys to solving such problems, and there is an urgent need for a device for widening the applicable displacement range of the mud generator and relieving the displacement fluctuation in the prior art. SUMMARY
[0004] In view of the above problems, the present application is proposed to provide a displacement regulating device, a mud generator, a drilling system and application thereof which can overcome the above problems or at least partially solve the above problems.
[0005] In a first aspect, an embodiment of the present application provides a displacement regulating device, which can include a flow sleeve and a displacement adjusting assembly.
[0006] The flow sleeve includes a top plate, and the top plate is provided with a main channel and an overflow channel;
[0007] In a state where the flow sleeve is sleeved outside the flow sleeve of the mud generator, the main channel is positionally corresponding to the mud channel on the flow sleeve;
[0008] The displacement adjusting assembly is sleeved outside the flow cylinder, a regulating valve core of the displacement adjusting assembly corresponds to a position of the overflow channel, and the regulating valve core is movable in an axial direction of the overflow channel to regulate a displacement of mud entering the overflow channel.
[0009] Optionally, the displacement adjusting assembly can include a regulating valve core, a regulating valve core seat, a spring, and a rotating nut.
[0010] The regulating valve core is mounted on the regulating valve core seat.
[0011] The regulating valve core seat, the spring, and the rotating nut are sleeved on the flow cylinder, and the spring is located between the regulating valve core seat and the rotating nut.
[0012] The rotating nut drives the regulating valve core seat to extend or retract through the spring, so that the regulating valve core moves in the axial direction of the overflow channel.
[0013] Optionally, the regulating valve core seat is provided with a first annular groove, and the rotating nut is provided with a second annular groove.
[0014] The spring is clamped in the first annular groove and the second annular groove, respectively.
[0015] Optionally, vertical grooves are formed on the outer sides of the regulating valve core seat and the rotating nut to serve as channels for mud flow.
[0016] Optionally, the inner end surface of the flow cylinder sleeve is provided with a positioning pin, and the flow cylinder sleeve is used to align the main channel with the mud channel through the positioning pin.
[0017] Optionally, the displacement regulating device further includes a filter screen located above the top plate.
[0018] In a second aspect, an embodiment of the present application provides a mud generator, which can include a generator body and a flow cylinder, and a displacement regulating device as described in the first aspect.
[0019] The flow cylinder sleeve and the displacement adjusting assembly are sleeved outside the flow cylinder, and the main channel corresponds to a position of the mud channel on the flow cylinder.
[0020] Optionally, the side wall of the flow cylinder is provided with a stepped structure.
[0021] The regulating valve core seat, the spring, and the rotating nut of the displacement adjusting assembly are sleeved on the flow cylinder, and the stepped surface of the stepped structure limits the rotating nut in the axial direction.
[0022] Optionally, the side wall of the flow cylinder is provided with external threads, and the rotating nut is threadedly connected with the flow cylinder.
[0023] Optionally, the outer side of the flow cylinder is further provided with a vertical groove.
[0024] Optionally, the mud generator can further include a generator upper joint and a generator outer drill collar.
[0025] The generator upper joint is connected with the magnetic shaft part of the generator body, and is in abutment with the flow cylinder and the flow cylinder sleeve.
[0026] The generator body, the flow cylinder and the displacement control device are located in the generator outer drill collar.
[0027] The generator upper joint extends out of the upper end of the generator outer drill collar, and is used for externally connecting a measuring device and / or a drill rod.
[0028] The lower end of the generator outer drill collar is used for externally connecting a drill bit.
[0029] In a third aspect, an embodiment of the present application provides a drilling system, which can include a drill bit, a drill rod, a measuring device and a mud generator as described in the second aspect.
[0030] The drill bit is connected with the generator outer drill collar of the mud generator.
[0031] The drill rod and / or the measuring device are connected with the generator upper joint of the mud generator.
[0032] The mud generator is used for supplying power to the measuring device.
[0033] In a fourth aspect, an embodiment of the present application provides an application of the mud generator as described in the second aspect in a drilling system.
[0034] In a fifth aspect, an embodiment of the present application provides a use method of the mud generator as described in the second aspect, which can include:
[0035] According to the optimal displacement of the mud, the density of the mud and the turbine coefficient of the generator, the pressure difference on both sides of the turbine is determined.
[0036] Based on the pressure difference, the diameter of the overflow channel and the elastic coefficient of the spring, the amount of compression of the spring is determined to determine the position of the rotating nut.
[0037] The above technical solutions provided in the embodiments of the present application have at least the following beneficial effects:
[0038] The application provides a displacement regulating device, a mud generator, a drilling system and application thereof.
[0039] The displacement regulating device provided in the application can dynamically adjust the proportion of the displacement of the mud generator passing through the stator and the rotor of the generator according to the displacement size, improve the applicable displacement range of the mud generator used by the downhole intelligent tool as a whole, widen the applicable displacement range of the mud generator and buffer the displacement fluctuation caused by the displacement mutation, and finally achieve the purpose of widening the applicable displacement range of the mud generator and improving the working stability.
[0040] Further, the device widens the applicable displacement range of the tool, has a good buffering function on the displacement fluctuation, has a simple structure, is strong in adaptability, and improves the working stability of the narrow window tool.
[0041] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
[0042] The technical solutions of the present application will be further described in detail below with reference to the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS
[0043] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application, and are used to explain the present application together with the embodiments of the present application, and do not constitute a limitation on the present application. In the drawings:
[0044] Figure 1 It is a structural schematic view of the displacement regulating device provided in the first embodiment of the present application;
[0045] Figure 2 It is an explosion schematic view of the displacement regulating device and the flow tube provided in the first embodiment of the present application;
[0046] Figure 3 It is a sectional view of the displacement regulating device and the flow tube provided in the first embodiment of the present application;
[0047] Figure 4 A sectional structure schematic diagram of the mud generator provided in the second embodiment of the present application;
[0048] Figure 5 One of the schematic diagrams of different states of the spring when adjusting provided in the second embodiment of the present application;
[0049] Figure 6 A state schematic diagram of the overflow passage partially opened spring provided in the second embodiment of the present application;
[0050] 1 is a mud generator;
[0051] 11 is a displacement control device; 12 is a flow tube; 13 is a generator body; 14 is a generator upper joint; 15 is a generator outer drill collar; 16 is a stator; 17 is a turbine;
[0052] 111 is a flow tube sleeve; 112 is a displacement adjusting assembly; 113 is a filter screen;
[0053] 1111 is a top plate; 1112 is a main passage; 1113 is an overflow passage; 1114 is a positioning pin; 1121 is an adjusting valve core; 1122 is an adjusting valve core seat; 1123 is a spring; 1124 is a rotating nut;
[0054] 121 is a mud passage; 122 is a step structure; 123 is a third vertical groove; 131 is a magnetic shaft part;
[0055] 11221 is a first annular groove; 11222 is a first vertical groove; 11241 is a second annular groove; 11242 is a second vertical groove. DETAILED DESCRIPTION
[0056] Exemplary embodiments of the present disclosure will be described in detail with reference to the drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood and so that the scope of the present disclosure can be completely conveyed to those skilled in the art.
[0057] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "far", "near", "front", "back", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0058] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0059] Embodiment one
[0060] The embodiment one of the present application provides a displacement control device, referring to Figures 1-3 The displacement control device 11 can include a flow sleeve 111 and a displacement adjusting assembly 112.
[0061] The flow sleeve 111 can include a top plate 1111, and the top plate 1111 is provided with a main channel 1112 and an overflow channel 1113.
[0062] The flow sleeve 111 is used in a sleeved state outside the flow sleeve 12 of the mud generator 1, and the main channel 1112 is in position correspondence with the mud channel 121 on the flow sleeve 12.
[0063] The displacement adjusting assembly 112 is used to be sleeved outside the flow sleeve 12, and the adjusting valve core 1121 of the displacement adjusting assembly 112 is in position correspondence with the overflow channel 1113, and the adjusting valve core 1121 can move along the axial direction of the overflow channel 1113, and the overflow channel 1113 is blocked and pressed to control the displacement of the mud entering the overflow channel 1113.
[0064] The above-mentioned displacement control device provided in the embodiment of the present application is an innovative technical solution proposed by the inventor in view of the situation that the narrow applicable displacement of the mud generator causes the tool equipment to work unstably or even unable to work. The device widens the applicable displacement range of the tool, has good buffering function for displacement fluctuation, has simple structure, strong adaptability, and improves the stability of the narrow window tool.
[0065] Referring to Figure 1 and Figure 2 As shown in the figures, the crescent-shaped main channel 1112 in the embodiment of the present application is used as a mud channel for driving the turbine to rotate inside the mud generator, and the circular hole-shaped overflow channel 1113 is used as a channel for controlling the mud flow / displacement. In the embodiment of the present application, the main channel and the overflow channel can be arranged according to actual needs, and are not necessarily limited to the four main channels and four overflow channels provided in the embodiment of the present application. The number and arrangement of the channels in the embodiment of the present application are not specifically limited.
[0066] In the specific implementation, the top end of the flow sleeve 111 is provided with a top plate 1111, and the bottom end of the flow sleeve 111 is open. In order to realize the adaptation of the flow sleeve 111 to the flow sleeve 12 of the mud generator 1, the generator upper joint and other components, a ladder-shaped mounting hole is formed in the top plate 1111 in the embodiment of the present application, so that after the mud generator is installed, the magnetic shaft part of the generator body can extend out of the mounting hole and be connected with the generator upper joint. It should be noted that the end of the adjusting valve core 1121 in the embodiment of the present application is ladder-shaped, which facilitates the opening of the overflow passage part and achieves the purpose of accurately regulating the displacement.
[0067] The displacement regulating device provided in the embodiment of the present application can be applied when the downhole intelligent tool is put into service, which avoids the situation that the working performance of the tool is unstable or cannot work due to the too narrow working displacement range of the downhole tool. The device can dynamically adjust the displacement proportion of the mud generator passing through the generator stator according to the displacement size, which can improve the applicable displacement range of the mud generator used by the downhole intelligent tool as a whole, widen the applicable displacement range of the mud generator and buffer the displacement fluctuation caused by the displacement mutation, and ultimately achieve the purpose of widening the applicable displacement range of the mud generator and improving the working stability.
[0068] In an optional embodiment, the displacement adjusting assembly 112 can include an adjusting valve core 1121, an adjusting valve core seat 1122, a spring 1123 and a rotating nut 1124.
[0069] The adjusting valve core 1121 is installed on the adjusting valve core seat 1122.
[0070] The adjusting valve core seat 1122, the spring 1123 and the rotating nut 1124 are used to be sleeved on the flow sleeve 12, and the spring 1123 is located between the adjusting valve core seat 1122 and the rotating nut 1124.
[0071] The rotating nut 1124 drives the adjusting valve core seat 1122 to stretch and retract through the spring 1123 to drive the adjusting valve core 1121 to stretch and retract, so that the adjusting valve core 1121 moves along the axial direction of the overflow passage 1113.
[0072] In the specific implementation, the adjusting valve core seat and the rotating nut in the embodiment of the present application are both annular, which are sleeved on the outside of the flow sleeve together with the spring. The rotating nut can be rotated on the flow sleeve to be fixed at a specified position. The displacement adjusting assembly provided in the embodiment of the present application can control the position of the adjusting valve core through the rotating nut, so that the adjusting valve core moves along the axial direction of the overflow passage to regulate the displacement of the mud.
[0073] The working principle of the device is that first, the spring pre-tightening force of the spring 6 is adjusted by adjusting the rotating nut, so that when the displacement is small, the adjusting valve core cannot be opened, when the displacement is in the optimal displacement range, the adjusting valve core is just opened, and with the further increase of the displacement, the opening gap of the adjusting valve core is further increased, the overflow channel is enlarged, the overflow amount is increased, the effective displacement of the generator rotor is reduced, and the actual applicable displacement range of the tool is widened.
[0074] In an optional embodiment, referring to Figures 1-3 , the adjusting valve core seat 1122 is provided with a first annular groove 11221, and the rotating nut 1124 is provided with a second annular groove 11241.
[0075] The spring 1123 is clamped in the first annular groove 11221 and the second annular groove 11241, respectively.
[0076] The first annular groove and the second annular groove in the embodiment of the application can accommodate the spring, position and limit the spring in the flow cylinder axis direction, and ensure the normal extension and contraction of the spring.
[0077] In an optional embodiment, referring to Figure 1 and Figure 2 , vertical grooves are formed on the outer sides of the adjusting valve core seat 1122 and the rotating nut 1124 to serve as the mud flow channel.
[0078] Referring to Figure 2 , the vertical groove on the adjusting valve core seat 1122 is a first vertical groove 11222, and the vertical groove on the rotating nut 1124 is a second vertical groove 11242. In the specific implementation, after the displacement control device is installed on the mud generator, the mud enters the motor interior from the main channel to drive the turbine to rotate, and then the mud flows out for recycling. It should be noted that the vertical groove on the rotating nut 1124 in the embodiment of the application not only serves as the mud flow channel, but also plays a friction role when adjusting the rotating nut, facilitating adjustment.
[0079] In an optional embodiment, referring to Figure 4 , the inner end surface of the flow cylinder sleeve 111 is provided with a positioning pin 1114, and the flow cylinder sleeve 111 is used to align the main channel 1112 with the mud channel 121 through the positioning pin.
[0080] In an optional embodiment, referring to Figure 4 , the displacement control device 11 further comprises a filter screen 113 located above the top plate 1111.
[0081] The filter screen in the embodiment of the application filters the mud entering the overflow channel, avoids congestion of the overflow channel, and can effectively ensure smooth extension and contraction of the adjusting valve core in the overflow channel.
[0082] The arrangement and regulation device provided in the embodiment of the present application can widen the applicable displacement of the generator, reduce the fluctuation of the displacement, and is the guarantee for the narrow window tool to improve the working stability. At present, the power supply to the downhole tool through the mud generator is the mainstream mode of the power supply to the downhole tool, but the power supply condition of the mud generator is directly related to the size of the displacement, and is greatly affected by the pulse sending, mud performance, working condition and other factors, and the power supply voltage is unstable; meanwhile, the power supply to the tool through the mud generator is also prone to cause two extreme conditions: power supply shortage caused by voltage drop and voltage protection caused by excessive voltage, and the displacement range corresponding to the two conditions is generally called the applicable displacement range, and the applicable displacement range of the general tool is large and has little effect on the tool working, but for some high-power tools, the applicable displacement range is narrow, and under the influence of external factors, the working performance is unstable and even cannot work normally. In order to improve the working performance of the tool, the arrangement and regulation device provided in the embodiment of the present application has an applicable displacement range, which can adjust the size of the overflow channel in real time according to the size of the displacement, reduce the buffer displacement fluctuation, that is, when the displacement suddenly increases, the overflow channel is enlarged correspondingly, the mud overflow amount is increased, and the increase range of the displacement is reduced, when the displacement suddenly decreases, the overflow channel is reduced correspondingly, the mud overflow amount is reduced, and the decrease range of the displacement is reduced, thereby fundamentally relieving the influence of the displacement mutation on the tool and improving the working stability of the tool.
[0083] The present application solves the problem of unstable working of the tool caused by the too narrow applicable displacement of the mud generator, widens the applicable displacement range of the tool, has good buffer function for the displacement fluctuation, has simple structure, high adaptability, and improves the working stability of the narrow window tool.
[0084] Embodiment two
[0085] Based on the same inventive concept, the embodiment two of the present application further provides a mud generator, as shown in the figure, the mud generator 1 can include: a generator body 13 and a flow cylinder 12, and the above-mentioned displacement regulation device 11; Figure 4
[0086] The flow cylinder sleeve 111 and the displacement adjustment assembly 112 are sleeved outside the flow cylinder 12, and the main channel 1112 is in position correspondence with the mud channel 121 on the flow cylinder 12.
[0087] Of course, the above-mentioned mud generator 1 in the embodiment of the present application also includes the necessary structure thereof, for example, a shell (generator outer drill collar 15), a stator 16 and a turbine 17 located inside the generator outer drill collar 15, and of course, the existing structure of the generator, such as the circuit, bearing and the like, are not described here again in the embodiment of the present application.
[0088] It should be noted that the stator 16 in the embodiment of the present application is threadedly connected with the generator body 13, and the specific connection position is the magnetic shaft portion 131, as shown in the figure, the stator 16 is locked with a stepped surface to limit the turbine 17. The flow cylinder 12 wraps the stator 16 and the turbine 17 as a whole and is threadedly connected with the magnetic shaft portion 131 of the generator body 13, thereby limiting the stator 16 and the turbine 17. Figure 4
[0089] In an optional embodiment, referring to Figure 2 and Figure 3 , the side wall of the flow cylinder 12 is provided with a stepped structure 122;
[0090] The adjusting valve core seat 1122, the spring 1123 and the rotating nut 1124 of the displacement adjusting assembly 112 are sleeved on the flow cylinder 12, and the stepped surface of the stepped structure 122 limits the rotating nut 1124 in the axial direction.
[0091] The inventor improves the flow cylinder in the prior art to make it suitable for the installation of the displacement regulating device. Referring to Figure 3 , the stepped structure 122 can accommodate the rotating nut 1124, the spring 1123 and the like, thereby limiting the rotating nut.
[0092] In an optional embodiment, the side wall of the flow cylinder 12 is provided with external threads (not shown in the figure), and the rotating nut 1124 is threadedly connected with the flow cylinder 12. The threaded connection facilitates the adjustment of the rotating nut to control the displacement of the mud.
[0093] In an optional embodiment, referring to Figure 2 , a vertical groove is further formed in the outer side of the flow cylinder 12. The vertical groove in the embodiment of the present application is a third vertical groove 123. The third vertical groove 123 ensures that the overflow mud is timely returned to the circulation system and ensures the pressure compensation on the upper and lower sides of the displacement adjusting valve core.
[0094] In an optional embodiment, referring to Figure 4 , the mud generator 1 can further include a generator upper joint 14 and a generator outer drill collar 15.
[0095] The generator upper joint 14 is connected with the magnetic shaft portion 131 of the generator body 13 and abuts against the flow cylinder 12 and the flow cylinder sleeve 111;
[0096] The generator body 13, the flow cylinder 12 and the displacement regulating device 11 are located in the generator outer drill collar 15;
[0097] The generator upper joint 14 extends out of the upper end of the generator outer drill collar 15 and is used for externally connecting a measuring device (not shown in the figure) and / or a drill rod (not shown in the figure);
[0098] The lower end of the generator outer collar 15 is used for an external drill bit (not shown in the figure).
[0099] In the specific implementation, referring to Figure 4 shown in the figure, the generator upper joint 14 is threadedly connected with the magnetic shaft part 131 of the generator body 13, and after installation, the flow cylinder 12 and the flow cylinder sleeve 111 are locked.
[0100] Referring to Figure 2 shown in the figure, the lower part of the flow cylinder 12 protrudes two oval strips, which cooperate with the internal space of the generator outer collar 15 to ensure the position fixation of the entire mud generator. In the preferred embodiment of the present application, the inner wall of the generator outer collar and the outer wall of the generator flow cylinder sleeve are in size cooperation and sealing, while the displacement adjusting valve core seat, the rotating nut and the outer diameter of the flow cylinder are all slightly smaller than the inner wall of the generator outer collar.
[0101] In the preferred embodiment of the present application, the displacement adjusting valve core seat, the rotating nut and the vertical groove outside the flow cylinder can all be used as mud flow channels, and the channel area is greater than the sum of the overflow channel areas on the flow cylinder sleeve.
[0102] Based on the same inventive concept, the present application also provides a drilling system, which can include a drill bit, a drill pipe, a measuring device and the above-mentioned mud generator.
[0103] The drill bit is connected with the generator outer collar of the mud generator.
[0104] The drill pipe and / or the measuring device are connected with the generator upper joint of the mud generator.
[0105] The mud generator is used to supply power to the measuring device.
[0106] Based on the same inventive concept, the present application also provides an application of the above-mentioned mud generator in a drilling system.
[0107] Based on the same inventive concept, the present application also provides a use method of the above-mentioned mud generator, which can include:
[0108] According to the optimal displacement of the mud, the density of the mud and the turbine coefficient of the generator, the pressure difference on both sides of the turbine is determined; based on the pressure difference, the diameter of the overflow channel and the elastic coefficient of the spring, the compression amount of the spring is determined to determine the position of the rotating nut.
[0109] The specific manner of adjusting the above-mentioned rotating nut in the embodiment of the present application refers to the following: Figure 5
[0110] Step 1, according to the tool entry into the well, the applicable displacement range of the tool is recorded, and the optimal working displacement V 佳 is found in the applicable displacement range, and the generator turbine speed v 佳 , the pressure difference ΔP between the upper and lower ends of the turbine 10 is calculated:
[0111]
[0112]
[0113] wherein C is a coefficient related to the turbine itself parameters; ρ is the mud density at the upper and lower ends of the turbine;
[0114] According to the design that the mud pressure at the displacement balances the spring pre-tightening force, the spring compression amount ΔX is calculated:
[0115]
[0116]
[0117] wherein k is the spring elastic coefficient; R0 is the overflow channel diameter;
[0118] Step 2, adjust the position of the rotating nut 1124 so that the rotating nut 1124 just contacts the spring 1123, measure and record the distance X1 between the rotating nut 1124 and the adjusting valve core seat 1122 at this time, continue to lock the rotating nut 1124, measure and record the distance X2 between the rotating nut 1124 and the adjusting valve core seat 1122 at this time, and the spring force F of the spring 1123 can be calculated at this time 弹 =k·(X1-X2);
[0119] Step 3, when the generator displacement is a lower value V1, i.e. V1 佳 , the hydraulic thrust at the upper and lower ends of the flow sleeve is F1, Since F1 弹 , the adjusting valve core 1121 does not move, and the displacement of the mud generator through the generator stator is the actual displacement V 实1 =V1;
[0120] Step 4, when the generator displacement continues to increase to V2 and V2>V 佳 , the hydraulic thrust at the upper and lower ends of the flow sleeve is F2, Since F2>F 弹 , the adjusting valve core 1121 moves downward under the action of the hydraulic thrust, the overflow channel is opened, and part of the mud flows out through the overflow channel, and the displacement of the mud generator through the generator stator is less than the actual displacement V2; as Figure 6 shown, when the generator displacement adjusting valve core 1121 moves a distance x to reach equilibrium, i.e.
[0121] wherein R2=R0-2x·tanθ
[0122] At this time, the actual displacement of the mud generator through the stator and rotor of the generator is:
[0123]
[0124]
[0125] wherein S0 is the sectional area of a single main flow channel;
[0126] Since R0 > R2, the actual displacement of the mud generator through the stator and rotor of the generator is V 实2 <V2, and with the increase of x, V 实2 The proportion of V2 is smaller and smaller.
[0127] Step 5, when the displacement of the generator continues to increase to V3, the hydraulic thrust F3 is formed on the upper and lower ends of the flow sleeve 111, Since F3 > F 弹 , and the adjusting valve core 1121 moves downward under the action of the hydraulic thrust, the overflow channel 1113 is fully opened, and the mud flows out through the overflow channel. At this time, the actual displacement of the mud generator through the stator and rotor of the generator is less than V3, And the proportion of the overflow displacement is larger than the previous overflow proportion; at this time, the actual displacement of the mud generator through the stator and rotor of the generator is V 实3 <V3, and with the increase of x', V 实3 The proportion of V3 is unchanged.
[0128] The above-mentioned continuous increase in displacement leads to a continuous decrease in the proportion of the actual displacement of the mud generator, and a continuous increase in the amount of overflow mud, so that the applicable displacement range of the mud generator is widened, and the displacement increase rate is gradually reduced, and the displacement fluctuation is small. Since the applicable displacement range of the narrow window tool is small, in order to better play the effect of widening the applicable displacement range of the generator, V 佳 is determined in the position of the applicable displacement range, so that the applicable displacement range of the generator is effectively widened.
[0129] The specific implementation manners and beneficial effects of the above-mentioned mud generator, drilling system, application of the mud generator and use method of the mud generator provided in the embodiments of the present application can be referred to the above-mentioned description of the displacement control device, and the embodiments of the present application will not be described here.
[0130] It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. The present disclosure is not limited to the precise construction described above and shown in the accompanying drawings and various modifications and changes can be effected therein by those skilled in the art without departing from the scope of the application. The scope of the present disclosure is limited only by the claims appended hereto. Thus, it is intended that the present application cover modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.
Claims
1. A displacement regulating device, characterized by, The mud motor comprises: a flow sleeve and a displacement adjusting assembly; the flow sleeve comprises a top plate, and a main channel and an overflow channel are arranged on the top plate; when the flow sleeve is sleeved outside the flow sleeve of the mud motor, the main channel is positioned corresponding to the mud channel on the flow sleeve; the displacement adjusting assembly is used for sleeving outside the flow sleeve, and comprises an adjusting valve core, an adjusting valve core seat, a spring and a rotating nut; the adjusting valve core seat, the spring and the rotating nut are used for sleeving on the flow sleeve, the spring is located between the adjusting valve core seat and the rotating nut, the adjusting valve core is installed on the adjusting valve core seat corresponding to the position of the overflow channel, and the rotating nut drives the adjusting valve core seat to stretch and contract through the spring to drive the adjusting valve core to stretch and contract, so that the adjusting valve core can move along the axial direction of the overflow channel to regulate the displacement of the mud entering the overflow channel.
2. The displacement regulating device of claim 1, wherein a first annular groove is arranged on the adjusting valve core seat, and a second annular groove is arranged on the rotating nut; the spring is clamped in the first annular groove and the second annular groove respectively.
3. The displacement regulating device of any one of claim 1, wherein, vertical grooves are arranged on the outer sides of the adjusting valve core seat and the rotating nut as channels for mud flow.
4. The displacement regulating device according to any one of claims 1 to 3, characterized in that an inner end surface of the flow sleeve is provided with a positioning pin, and the flow sleeve is used for aligning the main channel with the mud channel through the positioning pin; and / or, the displacement regulating device further comprises a filter screen located above the top plate.
5. A mud generator, characterized by The mud motor comprises: a generator body and a flow sleeve, and the displacement regulating device according to any one of claims 1-4; the flow sleeve and the displacement adjusting assembly are sleeved outside the flow sleeve, and the main channel is positioned corresponding to the mud channel on the flow sleeve.
6. The mud generator of claim 5, wherein, a stepped structure is arranged on the side wall of the flow sleeve; the adjusting valve core seat, the spring and the rotating nut of the displacement adjusting assembly are sleeved on the flow sleeve, and the stepped surface of the stepped structure limits the rotating nut in the axial direction.
7. The mud generator of claim 6, wherein, an outer thread is arranged on the side wall of the flow sleeve, and the rotating nut is threadedly connected with the flow sleeve; and / or, vertical grooves are further arranged on the outer side of the flow sleeve.
8. A slurry generator according to any one of claims 5 to 7, wherein The mud motor comprises: a generator upper joint and a generator outer drill collar; the generator upper joint is connected with the magnetic shaft part of the generator body, and abuts against the flow sleeve and the flow sleeve; the generator body, the flow sleeve and the displacement regulating device are located in the generator outer drill collar; the generator upper joint extends out of the upper end of the generator outer drill collar, and is used for externally connecting a measuring device and / or a drill rod; the lower end of the generator outer drill collar is used for externally connecting a drill bit.
9. A drilling system, characterized by The mud motor comprises: a drill bit, a drill rod, a measuring device and the mud motor according to any one of claims 5-8; the drill bit is connected with the generator outer drill collar of the mud motor; the drill rod and / or the measuring device are connected with the generator upper joint of the mud motor; the mud motor is used for supplying power to the measuring device.
10. Application of the mud motor according to any one of claims 5-8 in a drilling system.
11. A method of using a mud generator as claimed in any one of claims 5 to 8, characterised in that, The mud motor comprises: determining the pressure difference between the two sides of the turbine according to the optimal displacement of the mud, the density of the mud and the turbine coefficient of the generator; Based on the pressure differential, a diameter of the overflow channel, and a spring constant of the spring, a spring compression amount is determined to determine a position of the rotating nut.