A build-up rate adjustment mechanism for a rotary steerable system

Abstract

The application discloses a build-up rate adjusting mechanism for a rotary steering system and belongs to the technical field of oil drilling, which comprises an eccentric bearing assembly sleeve, an eccentric bearing, an eccentric bearing adjusting transmission mechanism, an eccentric adjusting transmission mechanism positioning sleeve, an eccentric bearing locking screw, a universal support sleeve, a universal support sleeve positioning upper sleeve, a universal support sleeve positioning lower sleeve and a universal support transmission structure, the eccentric bearing assembly sleeve is provided with an eccentric structure matched with the eccentric bearing, different eccentric distances of the adjusting end are realized by adjusting the eccentric bearing adjusting transmission structure, the supporting end is positioned and concentrically swung through the universal support sleeve, the universal support positioning upper sleeve and the universal support positioning lower sleeve, and the universal support transmission structure is used for controlling axial transmission rotation, the technical scheme of the application realizes the work of the rotary steering system at a set build-up rate through the cooperation of the adjusting end and the supporting end, and the adjustment of different build-up rates can be realized without disassembling the whole machine.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of oil drilling, and particularly relates to a build-up rate adjusting mechanism for a rotary steering system. BACKGROUND

[0002] At present, the build-up rate of the rotary steering system used in the field of oil drilling is a fixed structure after the system is shipped. If the build-up rate is to be changed, the eccentric component needs to be replaced by disassembling the whole machine. This method of adjusting the build-up rate by disassembling the whole machine is heavy in workload and prone to disassembly failure. There is an urgent need for a rotary steering system capable of adjusting the build-up rate without disassembling the whole machine in the field of oil drilling. The present application aims to solve the problem that the existing ordinary rotary steering system cannot adjust the build-up rate without disassembling the whole machine. SUMMARY

[0003] The present application aims to overcome the defects in the prior art and provide a build-up rate adjusting mechanism for a rotary steering system, which solves the problem that the existing ordinary rotary steering system cannot adjust the build-up rate without disassembling the whole machine.

[0004] The embodiments of the present application are implemented as follows:

[0005] In one aspect, the embodiments of the present application provide a build-up rate adjusting mechanism for a rotary steering system, which comprises an eccentric bearing assembly sleeve, an eccentric bearing, an eccentric bearing adjusting transmission mechanism, an eccentric adjusting transmission mechanism positioning sleeve, an eccentric bearing locking screw, a universal support sleeve, a universal support sleeve positioning upper sleeve, a universal support sleeve positioning lower sleeve, and a universal support transmission structure. The eccentric bearing assembly sleeve has an eccentric structure matched with the eccentric bearing. The eccentric bearing adjusting transmission structure is adjusted to achieve different eccentric distances of the adjusting end. The support end is positioned and concentrically swung by the universal support sleeve and the universal support positioning upper sleeve and the universal support positioning lower sleeve. The universal support transmission structure is used to control the axial transmission rotation.

[0006] Further, the adjusting mechanism shell is provided with an adjusting hole, and an adjusting tool can pass through the adjusting hole. The build-up rate is adjusted on the ground without disassembling the whole machine by the adjusting tool.

[0007] Further, the build-up rate adjusting mechanism has a universal support sleeve, which can swing at any position within the maximum build-up rate. The universal support sleeve has a transmission positioning function of the rotation direction of the axis of the rotary steering system. The center of the universal support sleeve is always located on the axis of the rotary steering system.

[0008] Further, the adjusting end of the build-up rate adjusting mechanism is provided with an eccentric bearing. The maximum eccentric position of the eccentric bearing is matched with the bearing assembly sleeve, which can achieve the maximum build-up rate and the minimum build-up rate. The eccentric bearing ring is an eccentric structure. The inner ring and the outer ring have an eccentric distance, which is matched and superimposed with the bearing assembly sleeve.

[0009] Further, the build-up rate adjusting mechanism is provided with an eccentric bearing assembly set, the eccentric bearing assembly set is provided with an eccentric structure, the inner ring and the outer circle have an eccentric distance, and the eccentric distance is the same as the eccentric distance of the eccentric bearing;

[0010] Further, when the eccentric bearing of the build-up rate adjusting mechanism is matched with the eccentric bearing assembly set, when the two eccentric directions are opposite, the build-up rate of the rotary steering system is the smallest, and when the two eccentric directions are the same, the build-up rate of the rotary steering system is the largest;

[0011] Further, the adjusting mechanism is adjusted and locked through a tooth structure, the eccentricity of the build-up rate adjusting mechanism is changed by rotating the tooth structure, and arbitrary build-up rate adjustment is realized.

[0012] Further, the eccentric bearing assembly set and the eccentric bearing are provided with a positioning groove for locking the relative position of the eccentric bearing and the eccentric bearing assembly set at different build-up rates.

[0013] Further, the universal support sleeve positioning upper sleeve and the universal support sleeve positioning lower sleeve have a spherical surface structure, and form a concentric ball with the universal support sleeve.

[0014] Further, the torque transmission structure of the universal support sleeve is spherical or strip-shaped.

[0015] Further, the strip-shaped structure includes a cylindrical strip, a spindle strip, a rectangular strip and the like.

[0016] The beneficial effects of the embodiment of the present application are as follows:

[0017] The technical scheme of the present application realizes the work of the rotary steering system at a set build-up rate through the joint action of the adjusting end and the supporting end, realizes the adjustment of different build-up rates without disassembling the whole machine, especially realizes the adjustment of an arbitrary build-up rate between zero build-up rate and maximum build-up rate, has the characteristics of convenient operation, and is suitable for popularization and application. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiment of the present application, the following will briefly introduce the drawings needed to be used in the embodiment, and it should be understood that the following drawings only show some embodiments of the present application, and should not be regarded as a limitation on the scope. Other related drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a structural schematic view of the build-up rate adjusting mechanism of the rotary steering system.

[0020] Figure 2 It is a structural schematic view of the eccentric bearing assembly set and the eccentric bearing, wherein A is an eccentric bearing outer sleeve, B is an eccentric bearing, and C is an eccentric bearing outer sleeve and an eccentric matching diagram.

[0021] Figure 3 Figure B is a cross-sectional view of A along A-A, which is a schematic diagram of the universal support sleeve structure, wherein B is the cross-sectional view of A along A-A.

[0022] Figure 4 Figure B is a schematic diagram of the build-up rate adjustment range, wherein A is the maximum build-up rate state and B is the minimum build-up rate state.

[0023] Figure 5 Figure B is a schematic diagram of the eccentric locking structure.

[0024] Figure 6 Figure B is a schematic diagram of the eccentric bearing assembly sleeve and eccentric bearing ring positioning structure, wherein A is the eccentric bearing assembly sleeve positioning structure and B is the eccentric bearing ring positioning structure.

[0025] Wherein: 1-eccentric bearing assembly sleeve, 11-eccentric bearing assembly sleeve positioning structure, 2-eccentric bearing, 21-eccentric bearing ring positioning structure, 3-eccentric adjustment transmission mechanism, 31-adjustment tool hole, 4-eccentric adjustment transmission mechanism positioning sleeve, 5-eccentric bearing locking screw, 51-locking tool hole, 6-universal support sleeve, 61-universal support sleeve positioning upper sleeve, 62-universal support sleeve positioning lower sleeve, 63-universal support sleeve torque transmission structure. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] As shown in Figure 1 The build-up rate adjustment mechanism of the present application for a rotary steering system can achieve arbitrary build-up rate adjustment between zero build-up rate and maximum build-up rate. Specifically, the present application comprises an adjustment end and a support end.

[0028] The support end has a universal support sleeve, the center of which always coincides with the axis of the rotary steering system, and can swing around the center of the universal support sleeve at any position adjusted by the adjustment end. The universal support sleeve also has a torque positioning function in the rotation direction of the axis of the rotary steering system.

[0029] The adjusting end is composed of an adjusting transmission mechanism and an eccentric compensation structure. The adjusting transmission mechanism is entered by an adjusting tool from an adjusting hole of the adjusting shell. The adjusting tool is used to realize the adjustment of the build-up rate of the whole rotary steering system on the ground without disassembly. The adjusting transmission mechanism includes a transmission mechanism, a positioning screw and a locking mechanism. Before the adjusting transmission mechanism is operated, the positioning screw of the eccentric bearing assembly is rotated away from the positioning groove of the eccentric bearing ring. Then, the locking tooth of the eccentric bearing assembly is disengaged from the eccentric bearing ring. After the locking is released, the transmission gear is rotated by the adjusting tool. The transmission gear drives the eccentric bearing ring to rotate. When the eccentric bearing ring is rotated to the required position, the locking tooth of the eccentric bearing assembly is engaged with the corresponding locking tooth of the eccentric bearing ring. Then, the locking screw of the eccentric bearing assembly is rotated into the positioning groove of the eccentric bearing ring. The adjustment of the build-up rate is completed.

[0030] The eccentric compensation structure is used to change the relative position of the eccentric bearing and the eccentric bearing assembly by the adjusting tool. The eccentric distance corresponding to different build-up rates is realized. When the eccentric distance of the eccentric bearing and the eccentric distance of the eccentric bearing sleeve are in the same direction and are superimposed, the maximum eccentric distance is obtained. The rotary steering system has the maximum build-up rate. When the eccentric distance of the eccentric bearing and the eccentric distance of the eccentric bearing sleeve are in opposite directions, the eccentric distance is cancelled. The rotary steering system has the minimum build-up rate or zero build-up rate.

[0031] Figure 2 The eccentric bearing assembly and the eccentric bearing, R is the outer circle radius of the eccentric bearing assembly, R1 is the assembly circle radius of the eccentric bearing assembly, δ1 is the eccentric distance between the assembly circle and the outer circle of the eccentric bearing assembly, r is the outer circle radius of the eccentric bearing, r = R1, r1 is the inner circle radius of the eccentric bearing, δ2 is the eccentric distance between the inner circle and the outer circle of the eccentric bearing. Generally, δ1 = δ2 is designed. When δ1 and δ2 are eccentric in the same direction, the build-up rate of the rotary steering system is maximum. For example, as shown in FIG. 1A, the build-up angle is α. When δ1 and δ2 are eccentric in opposite directions, the eccentricity is cancelled. The build-up rate of the rotary steering system is minimum. For example, as shown in FIG. 1B, the build-up rate is zero. Figure 4 Figure 4

[0032] Figure 6 The positioning structure of the eccentric bearing assembly and the eccentric bearing ring is used to realize the adjustment of any position between the minimum eccentricity δ1-δ2 and the maximum eccentricity δ1+δ2. The eccentricity of the eccentric bearing assembly and the eccentric bearing ring needs a positioning structure. After the eccentricity is adjusted, the position is fixed. Therefore, the eccentric bearing assembly fixing structure 11 is arranged on the inner circle of the eccentric bearing assembly 1. The structure is a tooth groove structure, but is not limited to the tooth groove structure. The eccentric bearing ring positioning structure 21 is arranged on the outer circle 2 of the eccentric bearing. The structure cooperates with the eccentric bearing assembly positioning structure 11 to realize the positioning and fixing functions.

[0033] ​​The application provides a build-up rate adjusting mechanism for a rotary steering system, and aims to solve the problem that the existing rotary steering system cannot adjust the build-up rate without disassembling the whole machine.

[0034] The application comprises a support end and an adjusting end, the support end has positioning, torque transmission and hinging functions, and the adjusting end has eccentricity adjusting, positioning and locking functions.

[0035] The support end comprises a universal support sleeve 6, which is a spherical structure, has a universal support sleeve positioning upper sleeve 61 at the left end and a universal support sleeve positioning lower sleeve 62 at the right end, and has a spherical structure, cooperates with the universal support sleeve 6 to form a concentric sphere, is positioned in the middle, and has its spherical center coinciding with the axis of the rotary steering system, can swing around the center of the universal support sleeve at any position, and is provided with a certain number of universal support sleeve torque transmission structures 63 in the circumferential direction, and has torque positioning function in the rotation direction of the axis of the rotary steering system under the action of the universal support sleeve torque transmission structures 63. The universal support sleeve 6 and the universal support sleeve torque transmission structures 63 have a certain swing freedom, the universal support sleeve 6 is provided with a long groove structure, the universal support sleeve 63 can slide in the long groove structure, and the universal support sleeve 63 is prevented from being stuck during adjustment. The universal support sleeve torque transmission structures 63 can be designed in a spherical shape, a strip shape, etc., but are not limited to the mentioned shapes.

[0036] The adjusting end, as shown in Figure 5 , comprises a transmission mechanism composed of an eccentric adjustment transmission mechanism 3, an eccentric adjustment mechanism positioning sleeve 4 and an eccentric bearing 2. The adjustment transmission mechanism enters from the 31 adjustment tool hole of the adjusting shell through an adjustment tool, and the build-up rate can be adjusted by the adjustment tool without disassembling the rotary steering system on the ground. The adjustment transmission mechanism comprises an eccentric bearing adjustment transmission mechanism of the transmission mechanism 3, the eccentric adjustment transmission mechanism positioning sleeve 4, the eccentric bearing 2, the eccentric bearing locking screw 5, the eccentric bearing ring positioning structure 21 and the eccentric bearing assembly sleeve positioning structure 11. Before adjustment, the eccentric adjustment mechanism positioning sleeve 4 is loosened, the eccentric bearing locking screw 5 is separated from the eccentric bearing ring positioning groove, the eccentric bearing assembly sleeve positioning structure 11 is disengaged from the eccentric bearing ring positioning structure 21, the eccentric adjustment transmission mechanism 3 transmission gear is rotated by the adjustment tool after unlocking, the transmission gear drives the eccentric bearing 2 to rotate, the eccentric bearing assembly sleeve positioning structure 11 is engaged with the eccentric bearing ring positioning structure 21 after the eccentric bearing 2 rotates to the required position, the eccentric bearing locking screw 5 of the eccentric bearing assembly sleeve and the eccentric bearing ring is screwed into the positioning groove of the eccentric bearing 2, and finally the eccentric adjustment transmission mechanism positioning sleeve 4 is tightened to complete the build-up rate adjustment operation.

[0037] The eccentricity compensation structure uses an adjustment tool to change the relative position of the eccentric bearing 2 and the eccentric bearing assembly 1, achieving different eccentric distances corresponding to different skew rates. When the eccentric distance δ2 of the eccentric bearing 2 and the eccentric distance δ1 of the eccentric bearing assembly 1 are superimposed in the same direction, the maximum eccentric distance is δ2 + δ1, and the rotary guide system exhibits the maximum skew rate. When the eccentric distance δ2 of the eccentric bearing 2 and the eccentric distance δ1 of the eccentric bearing assembly 1 are opposite in direction, the eccentric distances cancel each other out (δ2 - δ1), and the rotary guide system exhibits the minimum skew rate or zero skew rate. Arbitrary adjustments between the maximum and minimum eccentricity rates can be made by adjusting the values ​​between the maximum and minimum eccentricities.

[0038] Example 1

[0039] Reference Figure 1 The eccentric bearing assembly 1 has an eccentric structure that cooperates with the eccentric bearing 2. Different eccentric distances at the adjustment end are achieved by adjusting the transmission structure 3 through the eccentric bearing. The support end is positioned and concentrically oscillates through the universal support sleeve 6, the upper universal support positioning sleeve 61, and the lower universal support positioning sleeve 62. The universal support torsion transmission structure 63 controls the axial torsion transmission. Through the combined action of the adjustment end and the support end, the rotary guide system can operate at the set inclination rate, realizing the adjustment of different inclination rates without disassembling the entire machine.

[0040] Example 2

[0041] Figure 2 The diagram shows the eccentric structure of eccentric bearing assembly 1 and eccentric bearing 2. Eccentric bearing assembly 1 and eccentric bearing 2 are assembled on their outer rings. The eccentricity can be adjusted by changing the different shaft assembly positions. Different eccentricities correspond to different skew rates. The skew rate is largest when the eccentricities of parts 1 and 2 are in the same direction, and smallest when they are in opposite directions. When the design δ1 = δ2, the minimum eccentricity is zero. Figure 2 The assembly effect shown in the figure is that the eccentricity is zero. At this time, the center of the inner circle r1 of the eccentric bearing 2 is coaxial with the outer circle R of the eccentric bearing assembly 1, forming concentric circles.

[0042] Conversely, when eccentric bearing assembly 1 is adjusted to be eccentric in the same direction as eccentric bearing 2, δ1+δ2 reaches its maximum value. The superposition of the eccentricities of the two parts achieves the maximum eccentricity, and the corresponding skew rate is the maximum skew rate.

[0043] Example 3

[0044] Figure 3The middle part represents the support positioning and torque transmission structure of the universal support sleeve 6. The two ends of the universal support sleeve 6 are spherical structures, and the two ends are matched with the universal support sleeve positioning upper sleeve 61 and the universal support sleeve positioning lower sleeve 62 to form a concentric structure, so as to ensure that the center of the universal support sleeve 6 is always on the axis of the rotary steering system. A groove structure is formed on the outer side of the universal support sleeve 6, which is matched with the universal support sleeve torque transmission structure 63 to prevent rotation. The universal support sleeve 6 and the universal support sleeve torque transmission structure 63 have a certain degree of swing freedom, which facilitates the sliding of the universal support sleeve torque transmission structure 63, and avoids being stuck during adjustment. The universal support sleeve torque transmission structure 63 can be designed in a spherical shape, a strip shape, etc., but is not limited to the mentioned shapes.

[0045] Embodiment 4

[0046] Figure 4 The middle part represents the build-up rate in different adjustment states, which can be Figure 4 The two kinds shown in the middle part, but not limited to Figure 4 The middle part state, Figure 4 The maximum build-up rate and the minimum build-up rate are shown in the middle part. When the eccentric distances are added in the same direction, the maximum build-up rate corresponds to the maximum build-up angle. When the eccentric distances are added in opposite directions, the minimum eccentric distance or zero eccentric distance is obtained. At this time, the build-up rate is the minimum build-up rate or zero build-up rate angle. When the eccentric distance is adjusted at any position, the build-up rate is any build-up angle between zero and the maximum build-up rate.

[0047] Embodiment 5

[0048] Figure 5 、 Figure 6 The middle part represents the adjustment end. The eccentric bearing 2 and the eccentric bearing assembly sleeve 1 realize different eccentric matching. The positioning is realized by the meshing of the eccentric bearing ring positioning structure 21 and the eccentric bearing assembly sleeve positioning structure 11. The relative position change is realized by the meshing transmission of the eccentric adjustment transmission mechanism 3 and the outer circle of the eccentric bearing. In order to ensure that the adjustment position is not separated, the eccentric bearing locking screw 5 is used to press the positioning groove of the outer circle of the eccentric bearing. At the same time, the auxiliary compression of the eccentric adjustment mechanism 3 can be realized by tightening the eccentric adjustment mechanism positioning sleeve. In order to prevent foreign matters from entering the adjustment mechanism, the plug is arranged in the adjustment tool hole 31 and the locking tool hole 51 respectively to block the inner hole.

[0049] It should be understood that the above specific embodiments of the present application are only used for illustrative or explanatory purposes of the principles of the present application, and do not constitute a limitation on the present application. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application shall be included in the protection scope of the present application. In addition, the appended claims of the present application are intended to cover all changes and modifications falling within the scope and boundary of the appended claims, or the equivalent forms of such scope and boundary.

Claims

1. A build rate adjustment mechanism for a rotary steerable system, the build rate adjustment mechanism comprising: The eccentric bearing assembly set comprises an eccentric bearing assembly set, an eccentric bearing, an eccentric adjusting transmission mechanism, an eccentric adjusting transmission mechanism positioning sleeve, an eccentric bearing locking screw, a universal support sleeve, a universal support sleeve positioning upper sleeve, a universal support sleeve positioning lower sleeve and a universal support sleeve torque transmission structure. The inner circle of the eccentric bearing assembly set is provided with an eccentric bearing assembly set positioning structure, which is a tooth groove structure. The outer circle of the eccentric bearing is provided with an eccentric bearing ring positioning structure, which cooperates with the eccentric bearing assembly set positioning structure to realize the positioning and fixing function. The eccentric adjusting transmission mechanism is engaged with the outer circle of the eccentric bearing for transmission. The eccentric adjusting transmission mechanism positioning sleeve is used to press the eccentric adjusting transmission mechanism.

2. The build rate adjustment mechanism for a rotary steerable system of claim 1, wherein, The build-up rate adjusting mechanism is provided with a shell, and an adjusting hole is arranged on the shell.

3. The build rate adjustment mechanism for a rotary steermaie system of claim 1, wherein, The center of the universal support sleeve is always located on the axis of the rotary steering system.

4. The build rate adjustment mechanism for a rotary steermaie system of claim 1, wherein, The adjusting end of the build-up rate adjusting mechanism is provided with an eccentric bearing, and the maximum eccentric position of the eccentric bearing cooperates with the assembly set of the bearing to realize the maximum and minimum build-up rates.

5. The build rate adjustment mechanism for a rotary steermaie system of claim 1, wherein, The eccentric bearing ring is an eccentric structure, and the inner ring and the outer ring have an eccentric distance.

6. The build rate adjustment mechanism for a rotary steermaie system of claim 1, wherein, The eccentric bearing assembly set has an eccentric structure, and the inner ring and the outer circle have an eccentric distance.

7. The build rate adjustment mechanism for a rotary steermaie system of claim 1, wherein, When the two eccentric directions are opposite, the build-up rate of the rotary steering system is minimum.

8. The build rate adjustment mechanism for a rotary steermaie system of claim 1, wherein, The build-up rate adjusting mechanism is adjusted and locked through the tooth structure.

9. The build rate adjustment mechanism for a rotary steermaie system of claim 1, wherein, The eccentric bearing assembly set and the eccentric bearing are provided with positioning grooves for locking the relative position of the eccentric bearing and the eccentric bearing assembly set at different build-up rates.

10. The build rate adjustment mechanism for a rotary steermaie system of claim 1, wherein, The universal support sleeve positioning upper sleeve and the universal support sleeve positioning lower sleeve have a spherical surface structure, which cooperates with the universal support sleeve to form a concentric ball. The universal support sleeve torque transmission structure is spherical or strip-shaped.

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