A drilling pressure torque measurement calibration platform

Abstract

The present invention belongs to the technical field of downhole drilling engineering, and discloses a drilling pressure torque measurement calibration platform. It includes a base frame, a tension and compression assembly, a spline bending assembly, a smooth bending assembly and a torsion assembly arranged thereon, the downhole instrument to be measured is connected between the spline bending assembly and the smooth bending assembly, the spline bending assembly allows the axial movement of the front end of the downhole instrument to be measured and limits the rotation, the smooth bending assembly allows the axial movement and rotation of the rear end of the downhole instrument to be measured, the torsion assembly allows the rear end of the downhole instrument to be measured to be able to twist relative to the front end, the tension and compression assembly is used to apply tension and pressure to the front end of the downhole instrument to be measured, and the rear end of the downhole instrument to be measured is limited by the torsion assembly to limit the axial movement; the spline bending assembly includes a spline short section and a spline sleeve connected to the key, and the smooth bending assembly includes a smooth short section and a smooth sleeve slidably sleeved thereon. The drilling pressure torque measurement calibration platform of the present invention can realize three stress composite tests of drilling pressure, torque and bending moment.

Description

Technical Field

[0001] The invention relates to the technical field of downhole drilling engineering, and in particular to a drilling pressure torque measurement calibration platform. Background Art

[0002] With the development of oilfield drilling technology, especially the development of special process wells such as branch wells, horizontal wells, and herringbone wells, various complex situations such as drill bit sticking, cone loss, and drill bit breakage may occur frequently, which has a great impact on the safety and efficiency of drilling production. In particular, the complex well control problem of blowout and leakage is prominent, resulting in poor drillability and long drilling cycle. Downhole engineering parameter measurement instruments while drilling can measure and monitor the stress conditions of the instrument in real time to avoid damage to the instrument due to harsh working conditions in the well, but it cannot determine whether the measured stress conditions in the well have reached the warning value.

[0003] At present, downhole engineering parameter measuring instruments are usually used in conjunction with drilling pressure torque measurement calibration stations. The reason is that downhole engineering parameter measuring instruments rely on precise drilling pressure and torque sensors to obtain accurate measurement data. In order to ensure that these sensors can provide reliable measurement results in the actual drilling environment, these sensors need to be calibrated using a drilling pressure torque measurement calibration station. The drilling pressure torque measurement calibration station can simulate the stress conditions of downhole instruments in advance, and can output standard drilling pressure, torque, and bending moment to calibrate the corresponding values ​​measured by the downhole engineering parameter measuring instrument, thereby ensuring that the engineering parameter measuring instrument can provide accurate and reliable engineering parameter data during the drilling process.

[0004] However, the existing drilling pressure torque measurement calibration station only has the function of applying drilling pressure, torque and bending moment to the downhole instrument separately, and cannot act on the downhole instrument under test with three forces in combination, and also does not have the function of heating the downhole instrument. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention proposes a drilling pressure torque measurement calibration platform which can implement three stress composite tests of drilling pressure, torque and bending moment for downhole instruments to be tested.

[0006] The drilling pressure torque measurement calibration platform according to the present invention comprises: a base frame, and the following components are fixed on the base frame in sequence and at intervals: a tension and compression component, a spline bending component connected to the tension and compression component, a smooth bending component, and a torsion component connected to the smooth bending component. The front end of the downhole instrument to be measured is fixedly connected to the spline bending component, and the rear end of the downhole instrument to be measured is fixedly connected to the smooth bending component. The spline bending component is used to allow the axial movement of the front end of the downhole instrument to be measured and limit the rotation. The smooth bending component is used to allow the axial movement and rotation of the rear end of the downhole instrument to be measured. The torsion component is used to allow the rear end of the downhole instrument to be measured to be relatively The front end is twisted, and the tension and compression assembly is used to apply tension and pressure to the front end of the downhole instrument to be measured, and the rear end of the downhole instrument to be measured is restricted in axial movement by the torsion assembly; wherein, the spline bending assembly includes a spline short section connected between the tension and compression assembly and the front end of the downhole instrument to be measured, and a spline sleeve key-connected to the spline short section, and the spline sleeve can only move axially relative to the spline short section under the action of external force; the smooth bending assembly includes a smooth short section connected between the torsion assembly and the rear end of the downhole instrument to be measured, and a smooth sleeve slidably sleeved on the smooth short section, and the smooth sleeve can move axially and rotate relative to the smooth short section under the action of external force.

[0007] Furthermore, the tension and compression assembly includes a tension and compression cylinder bracket fixed at one end of the base frame, a tension and compression cylinder hinged to the tension and compression cylinder bracket through a stretching cylinder hinge point, the tension and compression cylinder is connected to a spline short section, and the stretching cylinder hinge point is constructed to only allow the tension and compression cylinder to swing laterally.

[0008] Furthermore, the spline bending assembly also includes a first bending cylinder bracket and a first bending cylinder anti-rotation block bracket which are relatively arranged and fixed in the width direction of the base frame, a first slideway connected between the first bending cylinder bracket and the first bending cylinder anti-rotation block bracket, a first bending cylinder anti-rotation block slidably connected to the first slideway, a first bending cylinder anti-rotation block cylinder fixed on the first bending cylinder anti-rotation block bracket, and a first bending cylinder fixed on the first bending cylinder bracket, wherein the first bending cylinder is hinged to the spline sleeve, the first bending cylinder anti-rotation block is fixedly connected to the spline sleeve, the first bending cylinder is used to push the spline sleeve to drive the first bending cylinder anti-rotation block to slide laterally along the first slideway, and the first bending cylinder anti-rotation block cylinder is used to support the first bending cylinder anti-rotation block.

[0009] Furthermore, the smooth bending assembly also includes a second bending cylinder bracket and a second bending cylinder anti-rotation block bracket arranged relatively in the width direction of the base frame, a second slideway connected between the second bending cylinder bracket and the second bending cylinder anti-rotation block bracket, a second bending cylinder anti-rotation block slidably connected to the second slideway, a second bending cylinder anti-rotation block cylinder fixed on the second bending cylinder anti-rotation block bracket, and a second bending cylinder fixed on the second bending cylinder bracket, wherein the second bending cylinder is hinged to the smooth sleeve, the second bending cylinder anti-rotation block is fixedly connected to the smooth sleeve, the second bending cylinder is used to push the smooth sleeve to drive the second bending cylinder anti-rotation block to slide laterally along the second slideway, and the second bending cylinder anti-rotation block cylinder is used to support the second bending cylinder anti-rotation block.

[0010] Furthermore, the thrust of the first bending cylinder is the same as that of the second bending cylinder.

[0011] Furthermore, the torsion assembly includes a fixed frame fixedly connected to the base frame, a torsion cylinder frame located in the fixed frame and capable of rotating relative to the fixed frame, an axial anchor bracket fixed on the torsion cylinder frame, an axial anchor rotating shaft fixed on the axial anchor bracket, a spline torsion short section connected to the smooth short section, a torsion sleeve key-connected to the spline torsion short section, a torsion cylinder hinged in the torsion cylinder frame, the torsion cylinder is hinged to the torsion sleeve, the spline torsion short section is hinged to the axial anchor rotating shaft, and the axial anchor rotating shaft is restricted from axial movement but allowed to rotate.

[0012] Furthermore, the drilling pressure torque measurement calibration platform also includes a supporting device arranged between the base frame and the downhole instrument to be measured, the supporting device includes a frame slidably connected to the base frame, a first walking wheel is arranged on the frame, a first walking motor is connected to the first walking wheel, and a jacking device is fixed to the frame. The jacking device is also rotatably connected to a supporting wheel for supporting the downhole instrument to be measured, and the supporting wheel allows the downhole instrument to be measured to rotate.

[0013] Furthermore, the drilling pressure torque measurement calibration platform also includes a worm gear reducer connected to the jacking device.

[0014] Furthermore, the drilling pressure torque measurement calibration platform also includes a heating assembly arranged on the base frame, the heating assembly includes a heating box into which the downhole instrument to be measured is axially sealed, a heating box cover located on the top of the heating box, and a second walking wheel arranged on the heating box, and a second walking motor is connected to the second walking wheel.

[0015] Furthermore, the area of ​​the downhole instrument to be tested located in the heating box is also provided with a tension-compression-torque composite sensor and a pressure sensor for measuring bending moment.

[0016] Compared with the prior art, the drilling pressure torque measurement calibration platform of the present invention can not only independently test any one of the three stresses of bending moment, tension and pressure, and torque of the downhole instrument to be tested at a specific temperature, but also can simultaneously realize the composite test of at least two of the three stresses of bending moment, tension and pressure, and torque, especially can simultaneously realize the composite test of the three stresses of bending moment, tension and pressure, and torque, and can solve the problems of calibration of drilling pressure tension, torque, bending moment, measurement accuracy verification, and instrument performance change at high temperature. The drilling pressure torque measurement calibration platform of the present invention is helpful to further promote the analysis and research of the high-temperature stress condition of downhole instruments, especially to promote the development of downhole engineering parameter measurement technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view schematic diagram of the structure of a drilling pressure torque measurement calibration platform according to an embodiment of the present invention;

[0018] Figure 2 It is a schematic top view of the structure of a drilling pressure torque measurement calibration platform according to an embodiment of the present invention;

[0019] Figure 3 for Figure 1 The structural schematic diagram of the tension and compression assembly shown;

[0020] Figure 4 for Figure 1 A schematic diagram of the structure of the spline bending assembly shown;

[0021] Figure 5 for Figure 1 The structural schematic diagram of the support trolley shown;

[0022] Figure 6 for Figure 1 A schematic diagram of the structure of the heating assembly shown;

[0023] Figure 7 for Figure 1 A schematic diagram of the structure of the smooth bending component shown;

[0024] Figure 8 for Figure 1 A schematic diagram of the structure of the torsion assembly shown;

[0025] Fig. 9 for Figure 1 The schematic diagram of the bit pressure torque measurement calibration station showing the bending moment loading of the downhole instrument to be measured;

[0026] Fig.10 for Figure 1 The schematic diagram of the drilling pressure torque measurement calibration station showing the tensile and compressive loading of the downhole instrument to be measured;

[0027] Fig.11 for Figure 1 The schematic diagram of the bit pressure torque measurement calibration station showing torque loading on the downhole instrument to be measured;

[0028] Fig.12 for Figure 1 The schematic diagram shown is a drilling pressure torque measurement calibration station for simultaneously applying tension, compression, bending moment and torque loading to the downhole instrument to be measured. DETAILED DESCRIPTION

[0029] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0030] Figure 1 and Figure 2 FIG. 2 shows the structure of a drilling pressure torque measurement calibration station 100 according to an embodiment of the present invention. Figure 1 and Figure 2 As shown, the drilling pressure torque measurement calibration platform 100 may include: a base frame 1, and fixed on the base frame 1 in sequence and at intervals: a tension and compression component 2, a spline bending component 3 connected to the tension and compression component 2, a smooth bending component 4, and a torsion component 5 connected to the smooth bending component 4. The front end of the downhole instrument 8 to be tested is fixedly connected to the spline bending component 3, and the rear end of the downhole instrument 8 to be tested is fixedly connected to the smooth bending component 4. The spline bending component 3 is used to allow axial movement of the front end of the downhole instrument 8 to be tested and limit rotation. The smooth bending component 4 is used to allow axial movement and rotation of the rear end of the downhole instrument 8 to be tested. The torsion component 5 is used to allow the rear end of the downhole instrument 8 to be tested to be able to twist relative to the front end. The compression component 2 is used to apply tensile pressure to the front end of the downhole instrument 8 to be measured, and the rear end of the downhole instrument 8 to be measured is restricted in axial movement by the torsion component 5; wherein, the spline bending component 3 may include a spline short section 31 connected between the tension and compression component 2 and the front end of the downhole instrument 8 to be measured, and a spline sleeve 32 key-connected to the spline short section 31, and the spline sleeve 32 can only move axially relative to the spline short section 31 under the action of external force; the smooth bending component 4 may include a smooth short section 41 connected between the torsion component 5 and the rear end of the downhole instrument 8 to be measured, and a smooth sleeve 42 slidably sleeved on the smooth short section 41, and the smooth sleeve 42 can move axially and rotate relative to the smooth short section 41 under the action of external force.

[0031] In the drilling pressure torque measurement calibration platform 100 of the embodiment of the present invention, since the spline bending component 3 and the smooth bending component 4 both allow the axial movement of the downhole instrument 8 to be measured, and the spline bending component 3 is connected to the tension and compression component 2, and the smooth bending component 4 is connected to the torsion component 5, the tension and compression component 2 and the torsion component 5 are used as hinge points to realize that the spline bending component 3 and the smooth bending component 4 simultaneously apply radial thrust to both ends of the downhole instrument 8 to be measured to complete the application of bending moment; since the spline bending component 3 and the smooth bending component 4 both allow the axial movement of the downhole instrument 8 to be measured, and the torsion component 5 can limit the axial movement of the downhole instrument 8 to be measured, the torsion component 5 is used as a fixed point to realize the tension and compression of the downhole instrument 8 to be measured by the tension and compression component 2 in the axial direction; since the spline bending component 3 limits the rotation of the downhole instrument 8 to be measured, and the smooth bending component 4 allows the rotation of the downhole instrument 8 to be measured, the spline bending component 3 is used as a fixed point to realize the torsion of the downhole instrument 8 to be measured by the torsion component 5 Rotation; since the spline bending component 3 and the smooth bending component 4 both allow axial movement of the downhole instrument 8 to be tested, the spline bending component 3 and the smooth bending component 4 do not affect the tension and pressure component 2 applying tension and pressure to the downhole instrument 8 to be tested when applying bending moment to the downhole instrument 8 to be tested. At the same time, since the spline bending component 3 limits the rotation of the front end of the downhole instrument 8 to be tested, and the smooth bending component 4 does not limit the rotation of the rear end of the downhole instrument 8 to be tested, the spline bending component 3 and the smooth bending component 4 do not affect the torsion component 5 applying torque to the rear end of the downhole instrument 8 to be tested when applying bending moment to the downhole instrument 8 to be tested. Therefore, the drilling pressure torque measurement calibration platform 100 of the embodiment of the present invention can not only realize the test of any one of the three stresses of bending moment, tension and pressure and torque separately through the above-mentioned setting, but also realize the composite test of at least two of the three stresses of bending moment, tension and pressure and torque at the same time, especially can realize the composite test of the three stresses of bending moment, tension and pressure and torque at the same time.

[0032] Specifically, in the drilling pressure torque measurement calibration platform 100 of the embodiment of the present invention, the key connection mode between the spline sleeve 32 and the spline short section 31 can realize that the spline sleeve 32 can move axially relative to the spline short section 31 while limiting the rotation of the spline sleeve 32 relative to the spline short section 31, so that the connection between the two can be used as a fixed point for the torsion component 5 to apply torque without affecting the tension and compression component 2 to apply tension and pressure; the sliding connection mode between the smooth sleeve 42 and the smooth short section 41 can realize that the smooth sleeve 42 can move axially relative to the smooth short section 41 while allowing the smooth sleeve 42 to rotate relative to the smooth short section 41, so that the connection between the two does not affect the torque applied by the torsion component 5, nor does it affect the tension and compression component 2 to apply tension and pressure in the axial direction. By using the key connection between the spline sleeve 32 and the spline short section 31 and the sliding connection between the smooth sleeve 42 and the smooth short section 41, bending and tensile loading can be achieved. At the same time, the right-side torsion cylinder can achieve bending and torsion loading, thereby realizing the composite loading of the three stresses of bending moment, tensile pressure and torque.

[0033] In the case of 1 and Figure 3 In the preferred embodiment shown, the tension and compression assembly 2 may include a tension and compression cylinder bracket 21 fixed to one end of the base frame 1, a tension and compression cylinder 23 hingedly connected to the tension and compression cylinder bracket 21 through a tension cylinder hinge point 22, the tension and compression cylinder 23 is connected to a spline short section 31, and the tension cylinder hinge point 22 is configured to only allow the tension and compression cylinder 23 to swing laterally (i.e. Figure 1 This arrangement is used to realize that when the downhole instrument 8 to be tested is subjected to a bending moment, the tension and compression oil cylinder 23 as the hinge point at the front end of the downhole instrument 8 to be tested can change its position adaptively with the bending of the downhole instrument 8 to protect the tension and compression oil cylinder 23 while ensuring the normal implementation of its tension and compression.

[0034] In such Figure 1 and Figure 4In the preferred embodiment shown, the spline bending assembly 3 may also include a first bending cylinder bracket 33 and a first bending cylinder anti-rotation block bracket 34 that are fixed and arranged opposite to each other in the width direction of the base frame 1, a first slideway 35 connected between the first bending cylinder bracket 33 and the first bending cylinder anti-rotation block bracket 34, a first bending cylinder anti-rotation block 36 slidably connected to the first slideway 35, a first bending cylinder anti-rotation block cylinder 37 fixed on the first bending cylinder anti-rotation block bracket 34, and a first bending cylinder 38 fixed on the first bending cylinder bracket 33. Among them, the first bending cylinder 38 and the spline sleeve 32 may be hinged through the first bending cylinder hinge point 39, the first bending cylinder anti-rotation block 36 is fixedly connected to the spline sleeve 32, the first bending cylinder 38 is used to push the spline sleeve 32 to drive the first bending cylinder anti-rotation block 36 to slide laterally along the first slideway 35, and the first bending cylinder anti-rotation block cylinder 37 is used to support the first bending cylinder anti-rotation block 36. In this embodiment, the provision of the first bending cylinder anti-rotation block 36 can ensure that the front end of the downhole instrument to be measured 8 is subjected to stable force in the lateral direction.

[0035] In such Figure 4 In the preferred embodiment shown, the first bending cylinder anti-rotation block 36 can be constructed as a block with an open groove, the spline sleeve 32 is fixed in the open groove, and the first bending cylinder 38 is hinged to the spline sleeve 32 through the first bending cylinder hinge point 39 at the opening of the open groove.

[0036] In such Figure 1 and Figure 5 In the preferred embodiment shown, the smooth surface bending assembly 4 may also include a second bending cylinder bracket 43 and a second bending cylinder anti-rotation block bracket 44 that are fixed and arranged opposite to each other in the width direction of the base frame 1, a second slideway 45 connected between the second bending cylinder bracket 43 and the second bending cylinder anti-rotation block bracket 44, a second bending cylinder anti-rotation block 48 slidably connected to the second slideway 45, a second bending cylinder anti-rotation block cylinder 46 fixed on the second bending cylinder anti-rotation block bracket 44, and a second bending cylinder 47 fixed on the second bending cylinder bracket 43. Among them, the second bending cylinder 47 is hinged to the smooth surface sleeve 42 through the second bending cylinder hinge point 49, the second bending cylinder anti-rotation block 48 is fixedly connected to the smooth surface sleeve 42, the second bending cylinder 47 is used to push the smooth surface sleeve 42 to drive the second bending cylinder anti-rotation block 48 to slide laterally along the second slideway 45, and the second bending cylinder anti-rotation block cylinder 46 is used to support the second bending cylinder anti-rotation block 48. In this embodiment, the provision of the second bending cylinder anti-rotation block 48 can ensure that the rear end of the downhole instrument to be measured 8 is subjected to stable force in the lateral direction.

[0037] In such Figure 5In the preferred embodiment shown, the second bending cylinder anti-rotation block 48 can be constructed as a block with an open groove, the smooth sleeve 42 is fixed in the open groove, and the second bending cylinder 47 is hinged to the smooth sleeve 42 at the opening of the open groove through the second bending cylinder hinge point 49.

[0038] Preferably, the thrusts of the first bending cylinder 38 and the second bending cylinder 47 can be set to be the same to ensure that the two ends of the downhole instrument 8 to be tested are subjected to the same force, so as to provide the bending moment more stably.

[0039] In such Figure 1 and Figure 6 In the preferred embodiment shown, the torsion assembly 5 may include a fixed frame 55 fixedly connected to the base frame 1, a torsion cylinder frame 52 located in the fixed frame 55 and capable of rotating relative to the fixed frame 55 about a rotating axis 53, an axial anchor bracket 59 fixed to the torsion cylinder frame 52, an axial anchor rotating axis 50 fixed to the axial anchor bracket 59, a spline torsion short section 51 connected to the smooth short section 41, a torsion sleeve 58 key-connected to the spline torsion short section 51, a torsion cylinder 56 hinged in the torsion cylinder frame 52 through a rear hinge point 54, the front end of the torsion cylinder 56 is hinged to the torsion sleeve 58 through a front hinge point 57, the spline torsion short section 51 is hinged to the axial anchor rotating axis 50 through an axial anchor hinge 501, and the axial anchor rotating axis 50 is restricted from axial movement but allowed to rotate.

[0040] In this embodiment, when the torsion cylinder 56 applies thrust to the torsion sleeve 58, the torsion sleeve 58 drives the spline torsion nipple 51 connected with the key to rotate, and the rotation of the spline torsion nipple 51 drives the axial anchor point rotary shaft 50 to rotate. At the same time, when a bending moment is applied to the rear end of the downhole instrument 8 to be measured, the bending of the spline torsion nipple 51 drives the torsion cylinder frame 52 to perform a rotary motion relative to the fixed frame 55. In this embodiment, the key connection between the torsion sleeve 58 and the spline torsion nipple 51 can provide torque to the rear end of the downhole instrument 8 to be measured, and the axial anchor point rotary shaft 50 is restricted from axial movement and allowed to rotate, so that the torque is applied to the rear end of the downhole instrument 8 to be measured and the axial anchor point rotary shaft 50 is also used as a fixed point for providing tension and pressure of the tension and compression assembly 2, so that the tension and compression assembly 2 does not affect the axial application of tension and pressure. At the same time, the torsion cylinder frame 52 can perform a rotary motion relative to the fixed frame 55 without affecting the loading of the bending moment.

[0041] In such Figure 1 and Figure 7In the preferred embodiment shown, the drilling pressure torque measurement calibration platform 100 may also include a support device 6 disposed between the base frame 1 and the downhole instrument 8 to be measured, and the support device 6 may include a frame 61 slidably connected to the base frame 1, and a first travel wheel 62 may be disposed on the frame 61, and a first travel motor 63 is connected to the first travel wheel 62, and a jacking device 66 fixed on the frame 61, and the jacking device 66 is driven by a jacking motor 65, and a support wheel 67 for supporting the downhole instrument 8 to be measured is also rotatably connected to the jacking device 66, and the support wheel 67 allows the rotation of the downhole instrument 8 to be measured. When a bending moment is applied to the downhole instrument 8 to be measured, the downhole instrument 8 to be measured will bend to a certain extent, and the rotation of the support wheel 67 can still provide stable support to the downhole instrument 8 to be measured after the downhole instrument 8 to be measured is bent to a certain extent; the provision of the first travel wheel 62 can enable the support device 6 to move axially, so as to better support the required part of the downhole instrument 8 to be measured.

[0042] Preferably, if Figure 7 As shown, the WOB torque measurement calibration platform 100 further includes a worm gear reducer 64 connected to the jacking motor 65. The arrangement of the worm gear reducer 64 makes the jacking motor 65 drive the jacking device 66 more labor-saving and can achieve self-locking.

[0043] In such Figure 1 and Figure 8 In the preferred embodiment shown, the drilling pressure torque measurement calibration platform 100 may also include a heating assembly 7 arranged on the base frame 1, the heating assembly 7 includes a heating box 71 for the downhole instrument 8 to be tested to be axially sealed and penetrated therein, a sealing member 76 may be provided at the contact position between the downhole instrument 8 to be tested and the heating box 71, a heating box cover 72 located on the top of the heating box 71, the heating box cover 72 may be opened or closed relative to the heating box 71 under the drive of the driving cylinder 73, and a second travel wheel 74 arranged on the heating box 71, and a second travel motor 75 is connected to the second travel wheel 74. Since the stress conditions of the downhole instrument 8 to be tested are different at different temperatures, this embodiment can realize the heating function of the required parts of the downhole instrument 8 to be tested, so as to simulate the high temperature environment of the well, thereby realizing the mechanical calibration of the downhole instrument 8 to be tested at different temperatures.

[0044] Furthermore, in a preferred embodiment, the area of ​​the downhole instrument 8 to be tested located in the heating box 71 is also provided with a tension-compression-torque composite sensor and a pressure sensor for measuring bending moment (neither of which are shown in the figure), which are used to measure the tension, pressure, bending moment and torque exerted on the downhole instrument 8 to be tested at a certain temperature.

[0045] When the drilling pressure torque measurement calibration platform 100 of the embodiment of the present invention is in operation, when a bending moment needs to be applied to the downhole instrument 8 to be measured, the Fig. 9As shown, the spline bending assembly 3 and the smooth bending assembly 4 simultaneously apply thrust F1 to the front and rear ends of the downhole instrument 8 to be measured, respectively. At this time, the extension cylinder hinge point 22 of the tension and compression assembly 2 and the rotary shaft 53 of the torsion assembly 5 serve as the front and rear ends of the downhole instrument 8 to be measured, respectively. When it is necessary to apply tension and pressure to the downhole instrument 8 to be measured, the combination Fig.10 As shown, the axial anchor hinge 501 of the torsion assembly 5 is used as the fixing point of the rear end of the downhole instrument 8 to be measured, and the tension and compression assembly 2 applies a tension and pressure F2 to the front end of the downhole instrument 8 to be measured; when a torque needs to be applied to the downhole instrument 8 to be measured, the tension and compression assembly 2 applies a tension and pressure F2 to the front end of the downhole instrument 8 to be measured. Fig.11 As shown in the figure, the connection between the spline sleeve 32 and the spline short section 31 in the spline bending assembly 3 is used as the fixing point of the front end of the downhole instrument 8 to be measured, and the torsion assembly 5 applies a torque F3 to the rear end of the downhole instrument 8 to be measured; when it is necessary to apply bending moment, tensile pressure and torque to the downhole instrument 8 at the same time, the torque is combined with the spline bending assembly 3 to fix the front end of the downhole instrument 8 to be measured. Fig.12 As shown, the spline bending assembly 3 and the smooth bending assembly 4 simultaneously apply thrust F1 to the front and rear ends of the downhole instrument 8 to be measured, respectively, the tension and compression assembly 2 applies tension and pressure F2 to the front end of the downhole instrument 8 to be measured, and the torsion assembly 5 applies torque F3 to the rear end of the downhole instrument 8 to be measured.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A drilling pressure torque measurement calibration station, characterized in that: include: A base frame, and the following components are fixed on the base frame in sequence and at intervals: a tension-compression component, a spline bending component connected to the tension-compression component, a smooth bending component, and a torsion component connected to the smooth bending component. The front end of the downhole instrument to be tested is fixedly connected to the spline bending component, and the rear end of the downhole instrument to be tested is fixedly connected to the smooth bending component. The spline bending component is used to allow axial movement of the front end of the downhole instrument to be tested and limit rotation. The smooth bending component is used to allow axial movement and rotation of the rear end of the downhole instrument to be tested. The torsion component is used to allow the rear end of the downhole instrument to be tested to be able to twist relative to the front end. The tension-compression component is used to The front end of the downhole instrument to be tested applies a tensile force, and the rear end of the downhole instrument to be tested is restricted from axial movement by the torsion assembly; wherein the spline bending assembly comprises a spline short section connected between the tensile and compressive assembly and the front end of the downhole instrument to be tested, and a spline sleeve key-connected to the spline short section, and the spline sleeve can only move axially relative to the spline short section under the action of an external force; the smooth bending assembly comprises a smooth short section connected between the torsion assembly and the rear end of the downhole instrument to be tested, and a smooth sleeve slidably sleeved on the smooth short section, and the smooth sleeve can move axially and rotate relative to the smooth short section under the action of an external force; The outer wall of the spline nipple is provided with spline teeth extending in the axial direction, and the inner wall of the spline sleeve is provided with keyways meshing with the spline teeth, so that the spline sleeve can only slide axially along the spline nipple and cannot rotate relatively; the outer surface of the smooth nipple and the inner surface of the smooth sleeve are both smooth cylindrical surfaces, so that the smooth sleeve can slide axially along the smooth nipple and rotate freely; The tension and compression assembly comprises a tension and compression cylinder bracket fixed to one end of the base frame, a tension and compression cylinder hinged to the tension and compression cylinder bracket through a stretch cylinder hinge point, the tension and compression cylinder is connected to the spline short section, and the stretch cylinder hinge point is configured to only allow the tension and compression cylinder to swing laterally; The spline bending assembly also includes a first bending cylinder bracket and a first bending cylinder anti-rotation block bracket that are relatively arranged and fixed in the width direction of the base frame, a first slideway connected between the first bending cylinder bracket and the first bending cylinder anti-rotation block bracket, a first bending cylinder anti-rotation block slidably connected to the first slideway, a first bending cylinder anti-rotation block cylinder fixed on the first bending cylinder anti-rotation block bracket, and a first bending cylinder fixed on the first bending cylinder bracket, wherein the first bending cylinder is hinged to the spline sleeve, the first bending cylinder anti-rotation block is fixedly connected to the spline sleeve, the first bending cylinder is used to push the spline sleeve to drive the first bending cylinder anti-rotation block to slide laterally along the first slideway, and the first bending cylinder anti-rotation block cylinder is used to support the first bending cylinder anti-rotation block; The smooth surface bending assembly also includes a second bending cylinder bracket and a second bending cylinder anti-rotation block bracket which are relatively arranged and fixed in the width direction of the base frame, a second slideway connected between the second bending cylinder bracket and the second bending cylinder anti-rotation block bracket, a second bending cylinder anti-rotation block slidably connected to the second slideway, a second bending cylinder anti-rotation block cylinder fixed on the second bending cylinder anti-rotation block bracket, and a second bending cylinder fixed on the second bending cylinder bracket, wherein the second bending cylinder is hinged to the smooth surface sleeve, the second bending cylinder anti-rotation block is fixedly connected to the smooth surface sleeve, the second bending cylinder is used to push the smooth surface sleeve to drive the second bending cylinder anti-rotation block to slide laterally along the second slideway, and the second bending cylinder anti-rotation block cylinder is used to support the second bending cylinder anti-rotation block; The torsion assembly includes a fixed frame fixedly connected to the base frame, a torsion cylinder frame located in the fixed frame and capable of rotating relative to the fixed frame, an axial anchor bracket fixed to the torsion cylinder frame, an axial anchor rotating shaft fixed to the axial anchor bracket, a spline torsion short section connected to the smooth short section, a torsion sleeve key-connected to the spline torsion short section, and a torsion cylinder hinged in the torsion cylinder frame, the torsion cylinder is hinged to the torsion sleeve, the spline torsion short section is hinged to the axial anchor rotating shaft, and the axial anchor rotating shaft is restricted from axial movement but allowed to rotate.

2. The bit pressure torque measurement calibration platform according to claim 1, characterized in that: The thrust of the first bending oil cylinder is the same as that of the second bending oil cylinder.

3. The drilling pressure torque measurement calibration platform according to any one of claims 1 to 2, characterized in that: The drilling pressure torque measurement calibration platform also includes a supporting device arranged between the base frame and the downhole instrument to be measured, the supporting device includes a frame slidably connected to the base frame, a first walking wheel is arranged on the frame, a first walking motor is connected to the first walking wheel, and a lifting device is fixed to the frame, the lifting device is also rotatably connected to a supporting wheel for supporting the downhole instrument to be measured, and the supporting wheel allows the downhole instrument to be measured to rotate.

4. The bit pressure torque measurement calibration platform according to claim 3, characterized in that: The drilling pressure torque measurement calibration platform also includes a worm gear reducer connected to the jacking device.

5. The drilling pressure torque measurement calibration platform according to any one of claims 1 to 2, characterized in that: The drilling pressure torque measurement calibration platform also includes a heating assembly arranged on the base frame, and the heating assembly includes a heating box into which the downhole instrument to be measured is axially sealed, a heating box cover located on the top of the heating box, and a second walking wheel arranged on the heating box, and a second walking motor is connected to the second walking wheel.

6. The drilling pressure torque measurement calibration platform according to claim 5, characterized in that: The area of ​​the downhole instrument to be tested located in the heating box is also provided with a tension-compression-torque composite sensor and a pressure sensor for measuring bending moment.

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