Mud pressure range determination method, device, electronic device and storage medium

Abstract

The present application provides a method, device, electronic device and storage medium for determining a mud pressure range, wherein the method comprises: obtaining the main macroscopic parameters of the soil, the static earth pressure coefficient, the performance index of the mud and the drilling parameters; obtaining the lower limit pressure according to the main macroscopic parameters, the static earth pressure coefficient, the performance index, the drilling parameters and the first preset formula; obtaining the upper limit pressure according to the main macroscopic parameters, the static earth pressure coefficient, the drilling parameters and the second preset formula; obtaining the mud pressure range according to the lower limit pressure and the upper limit pressure. Through the present application, the problem that it is difficult to obtain an accurate and reasonable mud pressure range in the related art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of trenchless pipeline installation and laying, and in particular to a method, device, electronic equipment and storage medium for determining a mud pressure range. Background Art

[0002] Horizontal directional drilling technology has been widely used in the field of buried pipeline laying in my country. This technology has the characteristics of small disturbance to the surface, short construction period and low comprehensive cost. The mud pressure in the hole is an important construction parameter in the horizontal directional drilling construction process. If the mud pressure in the hole is too low, it may cause the drill to be buried while causing the borehole to shrink or even collapse, thus hindering the normal progress of the construction; if the mud pressure in the hole is too high, the borehole wall will be hydraulically fractured and damaged, and then the surface mud will appear. Therefore, it is of great significance to scientifically and reasonably determine the mud pressure range in the horizontal directional drilling hole for engineering practice.

[0003] At present, most of the existing methods for determining the mud pressure in the hole are based on engineering practice experience, lack of scientific and reasonable theoretical basis, and are difficult to be widely promoted and generally applied in engineering practice; some existing technologies give a calculation method for the critical pressure of formation slurry based on the cavity expansion theory, but fail to take into account the hole wall collapse and drill burial caused by too low mud pressure in the hole; some existing technologies give the judgment conditions of hole wall collapse based on the Proctor unloading arch theory and use the vertical soil pressure at the top of the borehole as the hole wall collapse pressure, but this is inconsistent with the hole wall collapse failure mechanism.

[0004] Therefore, there is a problem in the prior art that it is difficult to obtain an accurate and reasonable mud pressure range. Summary of the invention

[0005] The present application provides a method, device, electronic device and storage medium for determining a mud pressure range, so as to at least solve the problem in the related art that it is difficult to obtain an accurate and reasonable mud pressure range.

[0006] According to one aspect of an embodiment of the present application, a method for determining a mud pressure range is provided, the method comprising:

[0007] Obtain the main macroscopic parameters of soil, static earth pressure coefficient, mud performance indicators and drilling parameters;

[0008] Obtaining a lower limit pressure according to the main macroscopic parameters, the static earth pressure coefficient, the performance index, the drilling parameters and a first preset formula;

[0009] Obtaining an upper limit pressure according to the main macroscopic parameters, the static earth pressure coefficient, the drilling parameters and a second preset formula;

[0010] The mud pressure range is obtained according to the lower limit pressure and the upper limit pressure.

[0011] According to another aspect of the embodiment of the present application, a mud pressure range determination device is also provided, the device comprising:

[0012] The acquisition module is used to obtain the main macroscopic parameters of the soil, static earth pressure coefficient, mud performance indicators and drilling parameters;

[0013] A first obtaining module is used to obtain a lower limit pressure according to the main macroscopic parameters, the static earth pressure coefficient, the performance index, the drilling parameters and a first preset formula;

[0014] A second obtaining module is used to obtain an upper limit pressure according to the main macroscopic parameters, the static earth pressure coefficient, the drilling parameters and a second preset formula;

[0015] The third obtaining module is used to obtain the mud pressure range according to the lower limit pressure and the upper limit pressure.

[0016] Optionally, the first preset formula includes a first sub-preset formula, a second sub-preset formula and a third sub-preset formula, and the first obtaining module includes:

[0017] A first acquisition unit, used for acquiring the annular mud flow rate of the mud;

[0018] A first obtaining unit, configured to obtain a minimum mud pressure according to the performance index, the drilling parameter, the annular mud flow rate, the gravity acceleration and the first sub-preset formula;

[0019] A first comparison unit, used for comparing the static earth pressure coefficient with a preset value to obtain a comparison result;

[0020] A second obtaining unit is used to substitute the main macroscopic parameters, the static earth pressure coefficient and the drilling parameters into the second sub-preset formula or the third sub-preset formula based on the comparison result to obtain the hole wall collapse pressure;

[0021] As a unit, it is used to take the larger value of the minimum mud pressure and the hole wall collapse pressure as the lower limit pressure.

[0022] Optionally, the second preset formula includes a fourth sub-preset formula and a fifth sub-preset formula, and the second obtaining module includes:

[0023] A third obtaining unit, configured to obtain a first intermediate parameter according to the main macroscopic parameter, the drilling parameter and a third preset formula;

[0024] A second comparison unit is used to compare the static earth pressure coefficient with a preset value to obtain a comparison result;

[0025] The fourth obtaining unit is used to substitute the main macro-parameter, the static earth pressure coefficient and the first intermediate parameter into the fourth sub-preset formula or the fifth sub-preset formula based on the comparison result to obtain the upper limit pressure.

[0026] Optionally, the first obtaining unit includes:

[0027] A first obtaining submodule, used for obtaining a second intermediate parameter according to the performance index, the drilling parameter and a fourth preset formula;

[0028] The second obtaining submodule is used to obtain the minimum mud pressure according to the second intermediate parameter, the performance index, the drilling parameter, the annular mud flow rate, the gravity acceleration and the first sub-preset formula.

[0029] Optionally, the second obtaining unit includes:

[0030] A third obtaining submodule is used to obtain a first intermediate parameter according to the main macroscopic parameter, the drilling parameter and a third preset formula;

[0031] A fourth obtaining submodule is used to obtain the hole wall collapse pressure according to the main macroscopic parameter, the static earth pressure coefficient, the first intermediate parameter and the second sub-preset formula when the static earth pressure coefficient is less than or equal to a preset value;

[0032] The fifth obtaining submodule is used to obtain the hole wall collapse pressure according to the main macroscopic parameters, the static earth pressure coefficient, the first intermediate parameter and the third sub-preset formula when the static earth pressure coefficient is greater than the preset value.

[0033] Optionally, the fourth obtaining unit includes:

[0034] a sixth obtaining submodule, configured to obtain the upper limit pressure according to the main macroscopic parameter, the static earth pressure coefficient, the first intermediate parameter and the fourth sub-preset formula when the static earth pressure coefficient is less than or equal to a preset value;

[0035] The seventh obtaining submodule is used to obtain the upper limit pressure according to the main macroscopic parameters, the static earth pressure coefficient, the first intermediate parameter and the fifth sub-preset formula when the static earth pressure coefficient is greater than the preset value.

[0036] Optionally, the acquisition module includes:

[0037] A second acquisition unit is used to acquire intermediate macroscopic parameters of a first preset number of soil samples;

[0038] a fifth obtaining unit, configured to obtain the main macroscopic parameter according to the first preset number, the intermediate macroscopic parameter and a fifth preset formula;

[0039] A third acquisition unit, used to acquire intermediate coefficients of a second preset number of tests;

[0040] The sixth obtaining unit is used to obtain the static earth pressure coefficient according to the second preset number, the intermediate coefficient and a sixth preset formula.

[0041] According to another aspect of the embodiments of the present application, there is also provided an electronic device, including a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; wherein the memory is used to store a computer program; and the processor is used to execute the method steps in any of the above embodiments by running the computer program stored in the memory.

[0042] According to another aspect of the embodiments of the present application, a computer-readable storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the method steps in any of the above embodiments when executed.

[0043] In the embodiment of the present application, the main macroscopic parameters of the soil, the static earth pressure coefficient, the performance index of the mud and the drilling parameters are obtained; the lower limit pressure is obtained according to the main macroscopic parameters, the static earth pressure coefficient, the performance index, the drilling parameters and the first preset formula; the upper limit pressure is obtained according to the main macroscopic parameters, the static earth pressure coefficient, the drilling parameters and the second preset formula; the mud pressure range is obtained according to the lower limit pressure and the upper limit pressure. Through the above method, the main macroscopic parameters of the soil, the static earth pressure coefficient, the performance index of the mud and the drilling parameters are obtained and comprehensively considered, and the upper limit pressure and the lower limit pressure of the mud are calculated according to the first preset formula and the second preset formula respectively, and then the pressure range of the mud is determined. The present application has a scientific and reasonable theoretical basis, is simple and easy to implement, and is accurate and reliable, providing a reasonable basis for the subsequent setting of construction parameters. It solves the problem that it is difficult to obtain an accurate and reasonable mud pressure range in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0046] Figure 1 is a flow chart of an optional method for determining a mud pressure range according to an embodiment of the present application;

[0047] Figure 2 is a schematic diagram of an optional value of θ according to an embodiment of the present application;

[0048] Figure 3 is a flow chart of another optional method for determining a mud pressure range according to an embodiment of the present application;

[0049] Figure 4 is a structural block diagram of an optional mud pressure range determination device according to an embodiment of the present application;

[0050] Figure 5 It is a structural block diagram of an optional electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0051] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0053] According to one aspect of an embodiment of the present application, a method for determining a mud pressure range is provided, such as Figure 1As shown, the method is applicable to determining the mud pressure of horizontal directional drilling construction, and the process of the method may include the following steps:

[0054] Step S101, obtaining main macroscopic parameters of soil, static earth pressure coefficient, performance indexes of mud and drilling parameters.

[0055] Alternatively, sampling can be carried out in the horizontal directional drilling construction area through on-site exploration, and the main macroscopic parameters of the soil in the horizontal directional drilling construction area, such as bulk density γ, cohesion c, internal friction angle, etc., can be obtained through indoor geotechnical tests. And the uniaxial tensile strength σ t The static earth pressure coefficient K of the soil in the horizontal directional drilling construction area is tested in situ through in-situ tests (such as lateral pressure test or flat shovel lateral expansion test). The mud is prepared indoors according to the mud formula for horizontal directional drilling construction, and the performance indicators of the mud, such as density ρ, are obtained through indoor tests. m , bulk densityγ m And the dynamic viscosity μ m , where the mud density ρ m and bulk density γ m It can be measured by mud specific gravity meter, dynamic viscosity μ m It can be measured by a six-speed rotation viscometer. Obtain drilling parameters such as the designed drilling diameter D, the designed drilling depth H, and the designed drilling trajectory length L.

[0056] Step S102, obtaining a lower limit pressure according to main macroscopic parameters, static earth pressure coefficient, performance index, drilling parameters and a first preset formula.

[0057] Optionally, the bulk density γ, cohesion c, internal friction angle among the main macroscopic parameters Static earth pressure coefficient K, density ρ in performance index m , bulk densityγ m , dynamic viscosity μ m Substitute the borehole design diameter D, borehole design burial depth H, and borehole trajectory design length L in the drilling parameters into the first preset formula to calculate the minimum mud pressure and hole wall collapse pressure. Then, the larger of the minimum mud pressure and hole wall collapse pressure is taken as the lower limit pressure of the mud pressure range in the horizontal directional drilling hole.

[0058] Step S103, obtaining the upper limit pressure according to the main macroscopic parameters, the static earth pressure coefficient, the drilling parameters and the second preset formula.

[0059] Optionally, the bulk density γ, uniaxial tensile strength σ t, the static earth pressure coefficient K and the designed burial depth H of the drilling parameters are substituted into the second preset formula to calculate the upper limit pressure of the mud pressure range in the horizontal directional drilling hole.

[0060] Step S104, obtaining the mud pressure range according to the lower limit pressure and the upper limit pressure.

[0061] Optionally, the mud pressure range in the horizontal directional drilling hole is obtained according to the lower limit pressure and the upper limit pressure.

[0062] In the embodiment of the present application, the main macroscopic parameters of the soil, the static earth pressure coefficient, the performance index of the mud and the drilling parameters are obtained; the lower limit pressure is obtained according to the main macroscopic parameters, the static earth pressure coefficient, the performance index, the drilling parameters and the first preset formula; the upper limit pressure is obtained according to the main macroscopic parameters, the static earth pressure coefficient, the drilling parameters and the second preset formula; the mud pressure range is obtained according to the lower limit pressure and the upper limit pressure. Through the above method, the main macroscopic parameters of the soil, the static earth pressure coefficient, the performance index of the mud and the drilling parameters are obtained and comprehensively considered, and the upper limit pressure and the lower limit pressure of the mud are calculated according to the first preset formula and the second preset formula respectively, and then the pressure range of the mud is determined. The present application has a scientific and reasonable theoretical basis, is simple and easy to implement, and is accurate and reliable, providing a reasonable basis for the subsequent setting of construction parameters. It solves the problem that it is difficult to obtain an accurate and reasonable mud pressure range in the related art.

[0063] As an optional embodiment, the first preset formula includes a first sub-preset formula, a second sub-preset formula and a third sub-preset formula, and the lower limit pressure is obtained according to the main macro parameters, the static earth pressure coefficient, the performance index, the drilling parameters and the first preset formula, including:

[0064] Obtain the annular mud velocity of the mud;

[0065] According to the performance index, drilling parameters, annular mud velocity, gravity acceleration and the first sub-preset formula, the minimum mud pressure is obtained;

[0066] Compare the static earth pressure coefficient with a preset value to obtain a comparison result;

[0067] Based on the comparison results, the main macro parameters, static earth pressure coefficient and drilling parameters are substituted into the second sub-preset formula or the third sub-preset formula to obtain the hole wall collapse pressure;

[0068] The larger value between the minimum mud pressure and the hole wall collapse pressure is taken as the lower limit pressure.

[0069] Optionally, the annular mud velocity U is calculated by field measurement. m .

[0070] The density ρ in the performance index m , bulk densityγ m , dynamic viscosity μ m , drilling parameters including drilling design diameter D, drilling design burial depth H, drilling trajectory design length L, annular space mud flow rate U m Substitute the gravity acceleration g into formula (1), which is the first sub-preset formula, to calculate the minimum mud pressure P m .

[0071]

[0072] Among them, λ m is the resistance loss coefficient along the flow of mud in the annulus, λ m The density ρ m , dynamic viscosity μ m , annular mud velocity U m , the designed drilling diameter D is calculated.

[0073] The static earth pressure coefficient K is compared with a preset value, such as 1, to obtain a comparison result, such as: K≤1 or K>1.

[0074] Based on the comparison results, the main macroscopic parameters such as bulk density γ, cohesion c, internal friction angle Substitute the static earth pressure coefficient K and the borehole design burial depth H in the drilling parameters into formula (2) (the second sub-preset formula) or formula (3) (the third sub-preset formula) to obtain the hole wall collapse pressure P coll .

[0075]

[0076]

[0077] Among them, σ soil is the vertical earth pressure at the top of the horizontal directional drilling hole, σ soil It can be calculated by the bulk density γ and the designed burial depth H of the drilling hole.

[0078] Comparison of minimum mud pressure P m and the pore wall collapse pressure P coll The larger of the two values ​​is taken as the lower limit pressure P of the mud pressure range in the horizontal directional drilling hole. lower .

[0079] P lower =max(P m ,P coll ) (4)

[0080] In the embodiment of the present application, the minimum mud pressure and the borehole wall collapse pressure are calculated respectively, and the larger of the two is taken as the lower limit pressure of the mud pressure range, which not only avoids the borehole wall collapse and drill burial caused by too low mud pressure in the borehole, but also ensures the flow of mud in the annulus, making the present application more in line with the actual engineering situation.

[0081] As an optional embodiment, the second preset formula includes a fourth sub-preset formula and a fifth sub-preset formula, and the upper limit pressure is obtained according to the main macro parameters, the static earth pressure coefficient, the drilling parameters and the second preset formula, including:

[0082] Obtaining a first intermediate parameter according to the main macro parameters, the drilling parameters and a third preset formula;

[0083] Compare the static earth pressure coefficient with a preset value to obtain a comparison result;

[0084] Based on the comparison result, the main macro parameters, the static earth pressure coefficient and the first intermediate parameter are substituted into the fourth sub-preset formula or the fifth sub-preset formula to obtain the upper limit pressure.

[0085] Optionally, the bulk density γ in the main macroscopic parameters and the designed burial depth H in the drilling parameters are substituted into formula (5), i.e., the third preset formula, to obtain the vertical earth pressure σ at the top of the horizontal directional drilling borehole: soil That is the first intermediate parameter.

[0086] σ soil =γ×H (5)

[0087] The static earth pressure coefficient K is compared with a preset value, such as 1, to obtain a comparison result, such as: K≤1 or K>1.

[0088] Based on the comparison results, the uniaxial tensile strength σ t , static earth pressure coefficient K and the first intermediate parameter σ soil Substituting into formula (6) (the fourth sub-preset formula) or formula (7) (the fifth sub-preset formula), the horizontal directional drilling hole wall fracture pressure P is obtained. frac , and P frac As the upper limit pressure P of the mud pressure range in horizontal directional drilling holes upper .

[0089] P upper =σ soil ×(3K-1)+σ t (K≤1) (6)

[0090] P upper =σ soil ×(3-K)+σ t (K>1) (7)

[0091] In the embodiment of the present application, the hole wall rupture pressure is calculated by using the main macroscopic parameters of the soil in the construction area, the static earth pressure coefficient K and the drilling parameters, and is used as the upper limit pressure. The influence of the mud pressure in the hole on the stability of the hole wall and the surface slurry is fully considered, so that the present application has a scientific and reasonable theoretical basis.

[0092] As an optional embodiment, the minimum mud pressure is obtained according to the performance index, the drilling parameters, the annular mud flow rate, the gravity acceleration and the first sub-preset formula, including:

[0093] Obtaining a second intermediate parameter according to the performance index, the drilling parameter and a fourth preset formula;

[0094] The minimum mud pressure is obtained according to the second intermediate parameter, the performance index, the drilling parameter, the annular mud flow rate, the gravity acceleration and the first sub-preset formula.

[0095] Optionally, the density ρ in the performance indicator m , dynamic viscosity μ m , annular mud velocity U m Substitute the borehole design diameter D in the drilling parameters into formula (8), i.e., the fourth preset formula, to calculate the drag loss coefficient λ along the path of the mud flowing in the annulus: m That is the second intermediate parameter.

[0096]

[0097] The second intermediate parameter λ m , bulk density γ in performance indicators m , drilling parameters including drilling design diameter D, drilling design burial depth H, drilling trajectory design length L, annular space mud flow rate U m Substitute the gravity acceleration g into formula (1), which is the first sub-preset formula, and calculate the minimum mud pressure P m .

[0098] In the embodiment of the present application, the along-the-way resistance loss coefficient is first calculated based on the mud performance indicators and drilling parameters, and then the minimum mud pressure is calculated based on the along-the-way resistance loss coefficient, performance indicators, drilling parameters, annular mud flow rate and gravity acceleration. The method is simple, easy to use, accurate and reliable.

[0099] As an optional embodiment, based on the comparison result, the main macro parameters, the static earth pressure coefficient and the drilling parameters are substituted into the second sub-preset formula or the third sub-preset formula to obtain the hole wall collapse pressure, including:

[0100] Obtaining a first intermediate parameter according to the main macro parameters, the drilling parameters and a third preset formula;

[0101] When the static earth pressure coefficient is less than or equal to the preset value, the hole wall collapse pressure is obtained according to the main macroscopic parameters, the static earth pressure coefficient, the first intermediate parameter and the second sub-preset formula;

[0102] When the static earth pressure coefficient is greater than a preset value, the hole wall collapse pressure is obtained according to the main macroscopic parameters, the static earth pressure coefficient, the first intermediate parameter and the third sub-preset formula.

[0103] Optionally, the bulk density γ in the main macroscopic parameters and the designed burial depth H in the drilling parameters are substituted into formula (5), i.e., the third preset formula, to obtain the vertical earth pressure σ at the top of the horizontal directional drilling borehole: soil That is the first intermediate parameter.

[0104] When the static earth pressure coefficient is less than or equal to the preset value, that is, the comparison result is K≤1, the first intermediate parameter σ soil , cohesion c, internal friction angle among the main macroscopic parameters Substitute the static earth pressure coefficient K into formula (2), i.e. the second sub-preset formula, to obtain the hole wall collapse pressure P coll .

[0105] When the static earth pressure coefficient is greater than the preset value, that is, the comparison result is K>1, the first intermediate parameter σ soil , cohesion c, internal friction angle among the main macroscopic parameters Substitute the static earth pressure coefficient K into formula (3), i.e. the third sub-preset formula, to obtain the hole wall collapse pressure P coll .

[0106] In the embodiment of the present application, the vertical earth pressure is first calculated by the main macro parameters and the drilling parameters, and then the vertical earth pressure, the main macro parameters and the static earth pressure coefficient are substituted into formula (2) or formula (3) according to whether the static earth pressure coefficient is greater than 1 to obtain the hole wall collapse pressure. It has a scientific and reasonable theoretical basis, and the method is simple, easy to implement, accurate and reliable.

[0107] As an optional embodiment, based on the comparison result, the main macroscopic parameters, the static earth pressure coefficient and the first intermediate parameter are substituted into the fourth sub-preset formula or the fifth sub-preset formula to obtain the upper limit pressure, including:

[0108] When the static earth pressure coefficient is less than or equal to the preset value, the upper limit pressure is obtained according to the main macroscopic parameters, the static earth pressure coefficient, the first intermediate parameter and the fourth sub-preset formula;

[0109] When the static earth pressure coefficient is greater than a preset value, the upper limit pressure is obtained according to the main macroscopic parameters, the static earth pressure coefficient, the first intermediate parameter and the fifth sub-preset formula.

[0110] Optionally, when the static earth pressure coefficient is less than or equal to the preset value, that is, the comparison result is K≤1, the uniaxial tensile strength σ in the main macroscopic parameters is t , static earth pressure coefficient K and the first intermediate parameter σ soil Substituting into formula (6), which is the fourth sub-preset formula, we get the upper limit pressure P upper .

[0111] When the static earth pressure coefficient is greater than the preset value, that is, the comparison result is K>1, the uniaxial tensile strength σ in the main macro parameters is t , static earth pressure coefficient K and the first intermediate parameter σ soil Substitute into formula (7) (the fifth sub-preset formula), and obtain the upper limit pressure P upper .

[0112] In the embodiment of the present application, according to whether the static earth pressure coefficient is greater than 1, the vertical earth pressure, main macro parameters, and static earth pressure coefficient are substituted into formula (6) or formula (7) to obtain the upper limit pressure. It has a scientific and reasonable theoretical basis, and the method is simple, easy to implement, accurate and reliable.

[0113] As an optional embodiment, obtaining main macroscopic parameters and static earth pressure coefficient includes:

[0114] Obtaining intermediate macroscopic parameters of a first preset number of soil samples;

[0115] Obtaining main macro parameters according to the first preset quantity, the intermediate macro parameters and the fifth preset formula;

[0116] Obtaining intermediate coefficients of a second preset number of tests;

[0117] The static earth pressure coefficient is obtained according to the second preset number, the intermediate coefficient and the sixth preset formula.

[0118] Optionally, samples are collected by drilling holes at equal intervals along the horizontal directional drilling design trajectory, and the intermediate macroscopic parameters of each sample (including bulk density γ, cohesion c, internal friction angle And the uniaxial tensile strength σ t ), use x i represents the intermediate macroscopic parameters of the i-th soil sample (such as the bulk density γ, cohesion c, internal friction angle of the i-th soil sample And the uniaxial tensile strength σ t ), there are a first preset number of samples obtained by drilling sampling, such as N, and N can be set according to demand.

[0119] According to the first preset number N, the intermediate parameters such as x iAnd formula (9) is the fifth preset formula, and the main macro parameters such as x are obtained, where x is the main macro parameters of the soil in the horizontal directional drilling construction area (including: bulk density γ, cohesion c, internal friction angle of the soil in the construction area And the uniaxial tensile strength σ t ).

[0120]

[0121] The static earth pressure coefficient of the soil in the horizontal directional drilling construction area is tested in situ through in-situ tests (such as lateral pressure test or flat shovel lateral expansion test). Each test can obtain a static earth pressure coefficient. For example, the static earth pressure coefficient measured by the i-th in-situ test is K i , which is called the intermediate coefficient, where the number of tests is a second preset number such as M times, and M can be set according to requirements.

[0122] According to the second preset number M, the intermediate coefficient such as K i And formula (10) that is, the sixth preset formula, obtains the static earth pressure coefficient K of the soil in the horizontal directional drilling construction area.

[0123]

[0124] In the embodiments of the present application, the subsequent parameters involved are obtained through indoor tests or in-situ tests, so that the parameters are accurate and reliable, and the accuracy of the mud pressure range finally determined is significantly improved compared with the prior art, making the mud pressure range determination method of the present application easy to be accepted and used by the majority of engineering construction personnel.

[0125] As an optional embodiment, the derivation process of formula (2), formula (3), formula (6) and formula (7) is:

[0126] According to the elastic stress solution around a circular hole in an infinite plate under bidirectional uniform pressure, the radial stress σ at the hole wall of a horizontal directional drilled hole under the vertical and horizontal pressure of the overlying soil is r1 and hoop stress σ θ1 (compressive stress is positive, tensile stress is negative) are:

[0127] σ r1 =0 (11)

[0128] σ θ1 =σ soil (K+1)+2σ soil (1-K)cos2θ (12)

[0129] Among them, Figure 2 As shown: θ is the angle traveled by rotating counterclockwise from the reference ray to a certain point on the borehole wall.

[0130] According to the elastic stress solution of a thick-walled cylinder under uniform internal pressure, the radial stress σ at the hole wall under the action of the mud pressure P in the horizontal directional drilling hole is r2 and hoop stress σ θ2 (compressive stress is positive, tensile stress is negative) are:

[0131] σ r2 =P (13)

[0132] σ θ2 =-P (14)

[0133] Wherein, P is the mud pressure in the horizontal directional drilling hole.

[0134] Therefore, under the combined effect of the overburden pressure outside the borehole and the mud pressure inside the hole, the radial stress σ at the hole wall of the horizontal directional drilling hole is r and hoop stress σ θ (compressive stress is positive, tensile stress is negative) are:

[0135] σ r =σ r1 +σ r2 =P (15)

[0136] σ θ =σ θ1 +σ θ2 =σ soil (K+1)+2σ soil (1-K)cos 2θ-P (16)

[0137] In horizontal directional drilling, under the combined effect of the overburden pressure outside the borehole and the mud pressure inside the hole, when the mud pressure inside the hole is too high and exceeds the critical value, the borehole wall will be hydraulically fractured. According to the tensile failure criterion, the annular stress σ θ When the following relationship is met, hydraulic fracturing damage occurs to the borehole wall:

[0138] σ θ ≤-σ t (17)

[0139] Substituting formula (16) into formula (17), we can simplify and obtain:

[0140] P ≥ σ soil (K+1)+2σ soil (1-K)×cos2θ+σ t (18)

[0141] If the static earth pressure coefficient K of the soil in the horizontal directional drilling construction area is less than or equal to 1, hydraulic fracturing will first occur at the top of the borehole (θ = 90°) or the bottom of the borehole (θ = 270°). The minimum mud pressure that causes hydraulic fracturing of the borehole wall is the horizontal directional drilling wall fracture pressure P. frac , which is the upper limit of the mud pressure range in the horizontal directional drilling hole P upper , so we have:

[0142] P frac =P upper =σ soil ×(3K-1)+σ t (6)

[0143] If the static earth pressure coefficient K of the soil in the horizontal directional drilling construction area is greater than 1, hydraulic fracturing failure will first occur at the arch line of the borehole (θ=0° and θ=180°). The minimum mud pressure that causes hydraulic fracturing of the borehole wall is the horizontal directional drilling hole wall fracture pressure P frac , which is the upper limit of the mud pressure range in the horizontal directional drilling hole P upper , so we have:

[0144] P frac =P upper =σ soil ×(3-K)+σ t (7)

[0145] In horizontal directional drilling, under the combined effect of the overburden pressure outside the borehole and the mud pressure inside the hole, when the mud pressure inside the hole is too low and below the critical value, the borehole wall will suffer shear failure. According to the Mohr-Coulomb shear failure criterion, the radial stress σ r and hoop stress σ θ Shear failure occurs on the borehole wall when the following relationship is met:

[0146]

[0147] Substituting formula (15) and formula (16) into formula (21), we can obtain the following simplified formula:

[0148]

[0149] If the static earth pressure coefficient K of the soil in the horizontal directional drilling construction area is less than or equal to 1, shear failure will first occur at the arch line of the borehole (θ=0° and θ=180°). The maximum mud pressure that causes shear failure of the borehole wall is the hole wall collapse pressure P coll :

[0150]

[0151] If the static earth pressure coefficient K of the soil in the horizontal directional drilling construction area is less than or equal to 1, the top of the borehole (θ = 90°) will first experience shear failure, and the maximum mud pressure that causes shear failure of the borehole wall is the hole wall collapse pressure P. coll :

[0152]

[0153] In the embodiments of the present application, based on the theories of fluid mechanics and solid mechanics, formulas (2), (3), (6) and (7) of the present application are derived, so that the present application has a scientific and reasonable theoretical basis, is suitable for directional drilling through formations at different levels, and can be widely promoted and widely used in engineering practice.

[0154] As an optional embodiment, Figure 3 1 is a flow chart of another optional method for determining a mud pressure range according to an embodiment of the present application, the method being applicable to determining mud pressure in horizontal directional drilling construction, the method comprising:

[0155] S1: Obtain the main macroscopic parameters of soil through field exploration and indoor geotechnical tests; S2: Obtain the static earth pressure coefficient of soil through in-situ tests; S3: Obtain mud performance indicators through indoor tests; S4: Calculate the minimum mud pressure in the hole required to maintain mud flow in the annulus; S5: Determine the collapse pressure of the horizontal directional drilling hole wall; S6: Determine the lower limit of the mud pressure range in the horizontal directional drilling hole; S7: Determine the upper limit of the mud pressure range in the horizontal directional drilling hole.

[0156] Optionally, for the specific implementation of this embodiment, please refer to the above embodiment and will not be repeated here.

[0157] In the embodiments of the present application, based on the theories of fluid mechanics and solid mechanics, a method for determining the range of mud pressure in a horizontal directional drilling hole is proposed, which comprehensively considers the influence of mud pressure in the hole on factors such as hole wall stability, surface slurry and rock cuttings migration in the hole. The method has a scientific and reasonable theoretical basis and is more in line with the actual engineering situation.

[0158] According to another aspect of an embodiment of the present application, a mud pressure range determining device for implementing the above-mentioned mud pressure range determining method is also provided. Figure 4 is a structural block diagram of an optional mud pressure range determination device according to an embodiment of the present application, such as Figure 4 As shown, the device may include:

[0159] The acquisition module 401 is used to acquire the main macroscopic parameters of the soil, the static earth pressure coefficient, the performance index of the mud and the drilling parameters;

[0160] A first obtaining module 402 is used to obtain a lower limit pressure according to main macro parameters, static earth pressure coefficient, performance index, drilling parameters and a first preset formula;

[0161] A second obtaining module 403 is used to obtain an upper limit pressure according to the main macroscopic parameters, the static earth pressure coefficient, the drilling parameters and the second preset formula;

[0162] The third obtaining module 404 is used to obtain the mud pressure range according to the lower limit pressure and the upper limit pressure.

[0163] It should be noted that the acquisition module 401 in this embodiment can be used to execute the above step S101, the first acquisition module 402 in this embodiment can be used to execute the above step S102, the second acquisition module 403 in this embodiment can be used to execute the above step S103, and the third acquisition module 404 in this embodiment can be used to execute the above step S104.

[0164] Through the above modules, the main macroscopic parameters of the soil, static earth pressure coefficient, mud performance indicators and drilling parameters are obtained and comprehensively considered, and the upper limit pressure and lower limit pressure of the mud are calculated according to the first preset formula and the second preset formula respectively, and then the pressure range of the mud is determined. This application has a scientific and reasonable theoretical basis, is simple and easy to implement, accurate and reliable, and provides a reasonable basis for the subsequent setting of construction parameters. It solves the problem that it is difficult to obtain an accurate and reasonable mud pressure range in the relevant technology.

[0165] As an optional embodiment, the first preset formula includes a first sub-preset formula, a second sub-preset formula and a third sub-preset formula, and the first obtaining module includes:

[0166] A first acquisition unit is used to acquire the annular mud flow rate of the mud;

[0167] A first obtaining unit is used to obtain the minimum mud pressure according to the performance index, the drilling parameter, the annular mud flow rate, the gravity acceleration and the first sub-preset formula;

[0168] A first comparison unit is used to compare the static earth pressure coefficient with a preset value to obtain a comparison result;

[0169] A second obtaining unit is used to substitute the main macro parameters, the static earth pressure coefficient and the drilling parameters into the second sub-preset formula or the third sub-preset formula based on the comparison result to obtain the hole wall collapse pressure;

[0170] As a unit, it is used to take the larger value of the minimum mud pressure and the hole wall collapse pressure as the lower limit pressure.

[0171] As an optional embodiment, the second preset formula includes a fourth sub-preset formula and a fifth sub-preset formula, and the second obtaining module includes:

[0172] A third obtaining unit is used to obtain a first intermediate parameter according to the main macro parameters, the drilling parameters and a third preset formula;

[0173] A second comparison unit is used to compare the static earth pressure coefficient with a preset value to obtain a comparison result;

[0174] The fourth obtaining unit is used to substitute the main macroscopic parameters, the static earth pressure coefficient and the first intermediate parameter into the fourth sub-preset formula or the fifth sub-preset formula based on the comparison result to obtain the upper limit pressure.

[0175] As an optional embodiment, the first obtaining unit includes:

[0176] A first obtaining submodule, used for obtaining a second intermediate parameter according to the performance index, the drilling parameter and a fourth preset formula;

[0177] The second obtaining submodule is used to obtain the minimum mud pressure according to the second intermediate parameter, the performance index, the drilling parameter, the annular space mud flow rate, the gravity acceleration and the first sub-preset formula.

[0178] As an optional embodiment, the second obtaining unit includes:

[0179] A third obtaining submodule is used to obtain a first intermediate parameter according to the main macro parameters, the drilling parameters and a third preset formula;

[0180] The fourth obtaining submodule is used to obtain the hole wall collapse pressure according to the main macro parameters, the static earth pressure coefficient, the first intermediate parameter and the second sub-preset formula when the static earth pressure coefficient is less than or equal to the preset value;

[0181] The fifth obtaining submodule is used to obtain the hole wall collapse pressure according to the main macro parameters, the static earth pressure coefficient, the first intermediate parameter and the third sub-preset formula when the static earth pressure coefficient is greater than the preset value.

[0182] As an optional embodiment, the fourth obtaining unit includes:

[0183] The sixth obtaining submodule is used to obtain the upper limit pressure according to the main macro parameters, the static earth pressure coefficient, the first intermediate parameter and the fourth sub-preset formula when the static earth pressure coefficient is less than or equal to the preset value;

[0184] The seventh obtaining submodule is used to obtain the upper limit pressure according to the main macro parameters, the static earth pressure coefficient, the first intermediate parameter and the fifth sub-preset formula when the static earth pressure coefficient is greater than the preset value.

[0185] As an optional embodiment, the acquisition module includes:

[0186] A second acquisition unit is used to acquire intermediate macroscopic parameters of a first preset number of soil samples;

[0187] a fifth obtaining unit, configured to obtain the main macroscopic parameter according to the first preset quantity, the intermediate macroscopic parameter and the fifth preset formula;

[0188] A third acquisition unit, used to acquire intermediate coefficients of a second preset number of tests;

[0189] The sixth obtaining unit is used to obtain the static earth pressure coefficient according to the second preset number, the intermediate coefficient and the sixth preset formula.

[0190] It should be noted here that the examples and application scenarios implemented by the above modules and corresponding steps are the same, but are not limited to the contents disclosed in the above embodiments.

[0191] According to another aspect of the embodiments of the present application, an electronic device for implementing the above-mentioned mud pressure range determination method is also provided. The electronic device may be a server, a terminal, or a combination thereof.

[0192] Figure 5 is a structural block diagram of an optional electronic device according to an embodiment of the present application, such as Figure 5 As shown, it includes a processor 501, a communication interface 502, a memory 503 and a communication bus 504, wherein the processor 501, the communication interface 502 and the memory 503 communicate with each other through the communication bus 504, wherein,

[0193] Memory 503, used for storing computer programs;

[0194] The processor 501 is used to execute the computer program stored in the memory 503 to implement the following steps:

[0195] Obtain the main macroscopic parameters of soil, static earth pressure coefficient, mud performance indicators and drilling parameters;

[0196] According to the main macro parameters, the static earth pressure coefficient, the performance index, the drilling parameters and the first preset formula, the lower limit pressure is obtained;

[0197] According to the main macro parameters, the static earth pressure coefficient, the drilling parameters and the second preset formula, the upper limit pressure is obtained;

[0198] The mud pressure range is obtained based on the lower limit pressure and the upper limit pressure.

[0199] Optionally, in this embodiment, the communication bus may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0200] The communication interface is used for communication between the above electronic device and other devices.

[0201] The memory may include RAM, or may include non-volatile memory, such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the aforementioned processor.

[0202] As an example, Figure 5 As shown, the memory 503 may include but is not limited to the acquisition module 401, the first acquisition module 402, the second acquisition module 403, and the third acquisition module 404 in the mud pressure range determination device. In addition, it may also include but is not limited to other module units in the mud pressure range determination device, which will not be repeated in this example.

[0203] The above-mentioned processor can be a general-purpose processor, which can include but not be limited to: CPU (Central Processing Unit), NP (Network Processor), etc.; it can also be DSP (Digital Signal Processing), ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0204] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0205] It can be understood by those skilled in the art that Figure 5The structure shown is for illustration only. The device for implementing the above-mentioned mud pressure range determination method may be a terminal device, which may be a smart phone (such as an Android phone, an iOS phone, etc.), a tablet computer, a PDA, a mobile Internet device (Mobile Internet Devices, MID), a PAD, and other terminal devices. Figure 5 It does not limit the structure of the above electronic device. For example, the terminal device may also include Figure 5 More or fewer components (such as network interfaces, display devices, etc.) shown in, or having Figure 5 Different configurations shown.

[0206] A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing the hardware related to the terminal device through a program, and the program can be stored in a computer-readable storage medium, which can include: a flash drive, ROM, RAM, a magnetic disk or an optical disk, etc.

[0207] According to another aspect of the embodiment of the present application, a storage medium is also provided. Optionally, in this embodiment, the storage medium can be used to store program codes for executing the mud pressure range determination method.

[0208] Optionally, in this embodiment, the storage medium may be located on at least one network device among a plurality of network devices in the network shown in the above embodiment.

[0209] Optionally, in this embodiment, the storage medium is configured to store program codes for executing the following steps:

[0210] Obtain the main macroscopic parameters of soil, static earth pressure coefficient, mud performance indicators and drilling parameters;

[0211] According to the main macro parameters, the static earth pressure coefficient, the performance index, the drilling parameters and the first preset formula, the lower limit pressure is obtained;

[0212] According to the main macro parameters, the static earth pressure coefficient, the drilling parameters and the second preset formula, the upper limit pressure is obtained;

[0213] The mud pressure range is obtained based on the lower limit pressure and the upper limit pressure.

[0214] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, which will not be described in detail in this embodiment.

[0215] Optionally, in this embodiment, the storage medium may include, but is not limited to, various media that can store program codes, such as a USB flash drive, a ROM, a RAM, a mobile hard disk, a magnetic disk, or an optical disk.

[0216] In the description of this specification, the description with reference to the terms "this embodiment", "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless there is any contradiction. In the description of the present disclosure, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0217] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A method for determining a mud pressure range, characterized in that: The method comprises: Obtain the main macroscopic parameters of the soil, static earth pressure coefficient K, mud performance indicators and drilling parameters, where the main macroscopic parameters of the soil include: bulk density γ, cohesion c, internal friction angle And the uniaxial tensile strength σ t The performance indicators of the mud include: density ρ m , bulk densityγ m And the dynamic viscosity μ m , the drilling parameters include: drilling design diameter D, drilling design burial depth H and drilling trajectory design length L; Obtaining a lower limit pressure according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the performance index of the mud, the drilling parameters and a first preset formula; The first preset formula includes a first sub-preset formula, a second sub-preset formula and a third sub-preset formula, and the first sub-preset formula is: The second sub-preset formula is: The third sub-preset formula is: Among them, σ soil =γ×H,P coll is the pore wall collapse pressure, P m is the minimum mud pressure, U m is the annular mud velocity, g is the gravity acceleration, λ m is the resistance loss coefficient along the flow of mud in the annulus, and the lower limit pressure is P coll and P m The larger value among ; The step of obtaining the lower limit pressure according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the performance index of the mud, the drilling parameters and the first preset formula includes: obtaining the minimum mud pressure according to the performance index of the mud, the drilling parameters and the first sub-preset formula; obtaining the hole wall collapse pressure according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the drilling parameters and the second sub-preset formula when the static earth pressure coefficient is less than or equal to 1; obtaining the hole wall collapse pressure according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the drilling parameters and the third sub-preset formula when the static earth pressure coefficient is greater than 1; and taking the larger value of the hole wall collapse pressure and the minimum mud pressure as the lower limit pressure; Obtaining an upper limit pressure according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the drilling parameters and a second preset formula; The second preset formula includes a fourth sub-preset formula and a fifth sub-preset formula, and the fourth sub-preset formula is: upper =σ soil ×(3K-1)+σ t (K≤1), the fifth sub-preset formula is: P upper =σ soil ×(3-K)+σ t (K>1), where P upper is the upper limit pressure; The obtaining of the upper limit pressure according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the drilling parameters and the second preset formula comprises: when the static earth pressure coefficient is less than or equal to 1, obtaining the upper limit pressure according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the drilling parameters and the fourth sub-preset formula; when the static earth pressure coefficient is greater than 1, obtaining the upper limit pressure according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the drilling parameters and the fifth sub-preset formula; The mud pressure range is obtained according to the lower limit pressure and the upper limit pressure.

2. The method according to claim 1, characterized in that The lower limit pressure is obtained according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the performance index of the mud, the drilling parameters and the first preset formula, including: obtaining an annular mud flow rate of the mud; Obtaining a minimum mud pressure according to the performance index of the mud, the drilling parameters, the annular mud flow rate of the mud, the gravity acceleration and the first sub-preset formula; Comparing the static earth pressure coefficient with a preset value to obtain a comparison result; Based on the comparison result, the main macroscopic parameters of the soil, the static earth pressure coefficient and the drilling parameters are substituted into the second sub-preset formula or the third sub-preset formula to obtain the hole wall collapse pressure; The larger value between the minimum mud pressure and the hole wall collapse pressure is used as the lower limit pressure.

3. The method according to claim 1, characterized in that: The step of obtaining the upper limit pressure according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the drilling parameters and the second preset formula includes: According to the main macroscopic parameters of the soil, the drilling parameters and the third preset formula, the first intermediate parameter is obtained, wherein the third preset formula is: σ soil =γ×H,σ soil represents the first intermediate parameter; Comparing the static earth pressure coefficient with a preset value to obtain a comparison result; Based on the comparison result, the main macroscopic parameters of the soil, the static earth pressure coefficient and the first intermediate parameter are substituted into the fourth sub-preset formula or the fifth sub-preset formula to obtain the upper limit pressure.

4. The method according to claim 2, characterized in that: The minimum mud pressure is obtained according to the performance index of the mud, the drilling parameters, the annular mud flow rate of the mud, the gravity acceleration and the first sub-preset formula, including: According to the performance index of the mud, the drilling parameters and the fourth preset formula, the second intermediate parameter is obtained, and the fourth preset formula is: λ m represents the second intermediate parameter; The minimum mud pressure is obtained according to the second intermediate parameter, the performance index of the mud, the drilling parameter, the annular mud flow rate of the mud, the gravity acceleration and the first sub-preset formula.

5. The method according to claim 2, characterized in that: Substituting the main macroscopic parameters of the soil, the static earth pressure coefficient and the drilling parameters into the second sub-preset formula or the third sub-preset formula based on the comparison result to obtain the hole wall collapse pressure includes: According to the main macroscopic parameters of the soil, the drilling parameters and the third preset formula, the first intermediate parameter is obtained, wherein the third preset formula is: σ soil =γ×H,σ soil represents the first intermediate parameter; When the static earth pressure coefficient is less than or equal to a preset value, the hole wall collapse pressure is obtained according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the first intermediate parameter and the second sub-preset formula; When the static earth pressure coefficient is greater than the preset value, the hole wall collapse pressure is obtained according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the first intermediate parameter and the third sub-preset formula.

6. The method according to claim 3, characterized in that Substituting the main macroscopic parameters of the soil, the static earth pressure coefficient and the first intermediate parameter into the fourth sub-preset formula or the fifth sub-preset formula based on the comparison result to obtain the upper limit pressure includes: When the static earth pressure coefficient is less than or equal to a preset value, the upper limit pressure is obtained according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the first intermediate parameter and the fourth sub-preset formula; When the static earth pressure coefficient is greater than the preset value, the upper limit pressure is obtained according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the first intermediate parameter and the fifth sub-preset formula.

7. The method according to claim 1, characterized in that Obtaining the main macroscopic parameters of the soil and the static earth pressure coefficient includes: Obtain the intermediate macroscopic parameters of the first preset number of soil samples, wherein the intermediate macroscopic parameters include: bulk density γ, cohesion c, internal friction angle And the uniaxial tensile strength σ t ; According to the first preset number, the intermediate macroscopic parameters of the first preset number of soil samples and a fifth preset formula, the main macroscopic parameters of the soil are obtained, wherein the fifth preset formula is: The x represents any parameter among the main macroscopic parameters of the soil, and N represents the first preset number; Get the intermediate coefficient K of the second preset number of tests i , i represents the number of trials; The static earth pressure coefficient is obtained according to the second preset number, the intermediate coefficient of the second preset number of tests and a sixth preset formula, wherein the sixth preset formula is: M represents the second preset number.

8. A mud pressure range determination device, characterized in that: include: The acquisition module is used to obtain the main macroscopic parameters of the soil, the static earth pressure coefficient K, the performance index of the mud and the drilling parameters, wherein the main macroscopic parameters of the soil include: bulk density γ, cohesion c, internal friction angle And the uniaxial tensile strength σ t The performance indicators of the mud include: density ρ m , bulk densityγ m And the dynamic viscosity μ m , the drilling parameters include: drilling design diameter D, drilling design burial depth H and drilling trajectory design length L; A first obtaining module is used to obtain a lower limit pressure according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the performance index of the mud, the drilling parameters and a first preset formula; The first preset formula includes a first sub-preset formula, a second sub-preset formula and a third sub-preset formula, and the first sub-preset formula is: The second sub-preset formula is: The third sub-preset formula is: Among them, σ soil =γ×H,P coll is the pore wall collapse pressure, P m is the minimum mud pressure, U m is the annular mud velocity, g is the gravity acceleration, λ m is the resistance loss coefficient along the flow of mud in the annulus, and the lower limit pressure is P coll and P m The larger value among ; The step of obtaining the lower limit pressure according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the performance index of the mud, the drilling parameters and the first preset formula includes: obtaining the minimum mud pressure according to the performance index of the mud, the drilling parameters and the first sub-preset formula; obtaining the hole wall collapse pressure according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the drilling parameters and the second sub-preset formula when the static earth pressure coefficient is less than or equal to 1; obtaining the hole wall collapse pressure according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the drilling parameters and the third sub-preset formula when the static earth pressure coefficient is greater than 1; and taking the larger value of the hole wall collapse pressure and the minimum mud pressure as the lower limit pressure; A second obtaining module is used to obtain an upper limit pressure according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the drilling parameters and a second preset formula; The second preset formula includes a fourth sub-preset formula and a fifth sub-preset formula, and the fourth sub-preset formula is: upper =σ soil ×(3K-1)+σ t (K≤1), the fifth sub-preset formula is: P upper =σ soil ×(3-K)+σ t (K>1), where P upper is the upper limit pressure; The obtaining of the upper limit pressure according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the drilling parameters and the second preset formula comprises: when the static earth pressure coefficient is less than or equal to 1, obtaining the upper limit pressure according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the drilling parameters and the fourth sub-preset formula; when the static earth pressure coefficient is greater than 1, obtaining the upper limit pressure according to the main macroscopic parameters of the soil, the static earth pressure coefficient, the drilling parameters and the fifth sub-preset formula; The third obtaining module is used to obtain the mud pressure range according to the lower limit pressure and the upper limit pressure.

9. An electronic device comprising a processor, a communication interface, a memory and a communication bus, wherein: The processor, the communication interface and the memory communicate with each other via the communication bus, wherein: The memory is used to store computer programs; The processor is configured to execute the method steps described in any one of claims 1 to 7 by running the computer program stored in the memory.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, wherein the computer program implements the method steps described in any one of claims 1 to 7 when executed by a processor.

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