Combined multifunctional casing head device
By introducing push and pull rods and control components into the casing head device, radial adjustment of the lower end of the hanger is achieved, which solves the problem of slight deviation of the hanger and is difficult to adjust, and improves the sealing performance and operational convenience.
Patent Information
- Application Number
- CN202510192111.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-05-09
AI Technical Summary
In the prior art, the slight deflection of the hanger in the casing head is difficult to accurately adjust, affecting the sealing performance and increasing the difficulty of operation.
A combined multifunctional casing head device is designed. By providing a push-pull rod and control assembly on the side wall of the casing head body, the adjustment screw and the push-pull rod are used to drive the push-pull rod to slide, and then adjust the positioning ring at the lower end of the hanger through the limiting groove to realize the radial adjustment of the hanger.
The device can easily correct the slight deviation of the suspension, improve the sealing performance and operational convenience of the casing head, avoiding the problems of laborious operation and inaccurate control in traditional methods.
Smart Images
Figure CN119957136A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of oil production equipment, and more specifically, relates to a combined multifunctional casing head device. Background Art
[0002] The casing head is a device used to hang casing in oil and gas wells. A hanger is installed in the casing head, and the corresponding casing is fixed by the hanger. Usually, the lower end of the hanger is set as a cone surface, and the inner wall of the casing head is also set with an annular cone surface. When the hanger is installed in the casing head, the cone surface is matched to make the central axis of the hanger coincide with the central axis of the casing head, so that the casing fixed on the hanger is located in the center of the casing head.
[0003] Most of the current casing heads are combined multifunctional casing heads. In the actual installation process of such casing heads, due to impurities entering, operating errors and other reasons, the hanger will be slightly deflected in the casing head. Although the deflection is not large, it may cause the sealing ring on the outer periphery of the hanger to fail to be accurately positioned, thereby affecting the sealing performance of the casing head; and because the casing is extremely long, even a slight deflection of the hanger will cause a large offset at the far end of the casing, so it needs to be corrected. Currently, the correction of the slight deflection of the hanger is generally achieved by knocking the hanger, but this method is laborious to operate and completely relies on experience. It is impossible to accurately control the adjustment amount and requires experienced workers to operate, and it may also damage the hanger; another method is to lift the hanger again and reinstall it. This method is time-consuming and labor-intensive, and is prone to the same problem, so it is usually less used. Summary of the invention
[0004] In view of this, an embodiment of the present application provides a combined multifunctional casing head device to solve the technical problem in the prior art that a slight deflection of a hanger in a casing head is difficult to adjust.
[0005] To achieve the above purpose, the technical solution adopted in this application is: Provided is a combined multifunctional casing head device, comprising: The casing head body has a mounting cavity inside, and the inner wall of the mounting cavity is provided with a first annular cone surface; the side wall of the casing head body is provided with a side through hole connected with the interior, and the side through hole is located below the first annular cone surface; The hanger has a second annular conical surface on the outer periphery of the lower end, and the second annular conical surface is suitable for matching with the first annular conical surface; the lower end of the hanger is also provided with a positioning ring; A push-pull rod is provided on the side wall of the casing head body and slides radially along the casing head body, and is located above the side through hole and below the first annular cone surface; a limiting groove is provided at the inner end of the push-pull rod; when the hanger is installed in the casing head body, the positioning ring enters the limiting groove; a push sliding hole is provided at the outer end of the push-pull rod and penetrates radially; A control assembly, comprising an adjusting screw and a pushing slider; the adjusting screw is obliquely arranged on the upper side wall of the side through hole, and a screwing portion is arranged at the outer end, and the outer end of the adjusting screw is biased toward the outer opening of the side through hole and exposes the screwing portion; the pushing slider is connected to the inner end of the adjusting screw and passes through the pushing slide hole to form a sliding fit, and the axis of the pushing slider is arranged at an acute angle to the axis of the adjusting screw and the axis of the push-pull rod; The adjusting screw drives the pushing slider axially to drive the push-pull rod to slide through the cooperation between the pushing slider and the pushing sliding hole, so that the limiting groove drives the positioning ring to move radially along the casing head body to realize the lower end deviation correction of the hanger.
[0006] In some embodiments, the casing head body is provided with at least two side through holes, and the angle between adjacent side through holes in the circumferential direction of the casing head body is greater than or equal to 30° and less than or equal to 120°; at least two of the side through holes are correspondingly provided with the push-pull rod and the control assembly; When the hanger is installed in the casing head body, different parts of the positioning ring respectively enter the limiting grooves of the push-pull rods corresponding to different side through holes.
[0007] In some embodiments, a deflection head is rotatably provided at the inner end of the push-pull rod, and the deflection head is deflected upward by an elastic structure, and the limiting groove is provided on the upper side of the deflection head; The maximum allowable deflection angle of the hanger axis relative to the casing head body axis is α, the angle between the outer side of the positioning ring and the hanger axis is β, and the angle between the inner side of the positioning ring and the hanger axis is -β, -α<β<α.
[0008] In some embodiments, the cross-section of the limiting groove is rectangular, and balls are embedded on two side walls, and the balls on the two side walls are respectively opposite to the two side surfaces of the positioning ring.
[0009] In some embodiments, when the deflection head is in a free state, the opening of the limiting groove is horizontal.
[0010] In some embodiments, the elastic structure is a torsion spring disposed at the rotation axis of the deflection head.
[0011] In some embodiments, the positioning ring and the hanger are designed as separate parts and are connected in a retrofitted manner.
[0012] In some embodiments, an inclined mounting hole is provided on the upper side wall of the side through hole, and the opening of the mounting hole is biased toward the outer side opening of the side through hole and is exposed; An eccentric supporting sliding hole is arranged at the bottom of the mounting hole, and the axis of the supporting sliding hole is parallel to the axis of the mounting hole; In the axial direction of the mounting hole, the vertical projection of the supporting sliding hole falls within the outer contour of the mounting hole; the portion of the push-pull rod provided with the pushing sliding hole crosses through the mounting hole.
[0013] In some embodiments, the push slider includes a connecting section, a matching section and a supporting section connected in sequence, the axis of the matching section is arranged at an acute angle with the axis of the connecting section, and the axis of the supporting section is parallel to the axis of the connecting section; On the radial plane of the connecting section, the vertical projection of the matching section and the vertical projection of the supporting section both fall within the outer contour of the connecting section; On the radial plane of the matching segment, the vertical projection of the supporting segment falls within the outer contour of the matching segment; The connecting section is slidably matched with the mounting hole, the matching section passes through the pushing sliding hole, and the supporting section is slidably matched with the pushing sliding hole.
[0014] In some embodiments, the open end of the mounting hole is threadedly connected to a limiting sleeve, the limiting sleeve limits the maximum distance of the push slider sliding outward, and the adjusting screw is threadedly connected in the limiting sleeve.
[0015] The combined multifunctional casing head device provided by the embodiment of the present application has the following beneficial effects: compared with the prior art, the combined multifunctional casing head device of the embodiment of the present application is different from the conventional method of adjusting from the top of the hanger, and the embodiment of the present application corrects the deflection by adjusting the lower end of the hanger; by rotating the adjusting screw, the adjusting screw drives the pushing slider axially, and since the axis of the pushing slider is arranged at an acute angle to the axis of the adjusting screw and the axis of the push-pull rod, the pushing slider drives the push-pull rod to move radially along the casing head body through the driving sliding hole, and then drives the positioning ring at the lower end of the hanger through the limiting groove of the push-pull rod, thereby radially adjusting the lower end of the hanger, and can conveniently correct the slight deflection of the hanger; The adjusting screw of the control assembly is obliquely arranged on the upper side wall of the side through hole, and the outer end is biased toward the outer opening of the side through hole and exposed. It can be easily rotated from the outside without penetrating the side wall of the casing head body. No additional sealing is required, thereby ensuring the sealing and pressure-bearing capacity of the casing head body. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0017] Figure 1 A schematic diagram of the internal structure of a combined multifunctional casing head device provided in an embodiment of the present application; Figure 2 for Figure 1 The enlarged view of point A in the middle; Figure 3 Schematic diagram of the local state when the push-pull rod pushes the positioning ring, in which 0<β<α, angle a is the deflection angle of the hanger axis relative to the casing head main body axis, and a is greater than α; Figure 4 It is a schematic diagram of the local state when the push-pull rod pushes the positioning ring. In the figure, 0<β<α, and the angle a is the deflection angle of the hanger axis relative to the casing head main body axis. When a is less than α, the positioning ring exerts a downward force on the deflection head. Figure 5 It is a schematic diagram of the local state when the push-pull rod pulls the positioning ring. In the figure, 0<β<α, and the angle a is the deflection angle of the hanger axis relative to the casing head main body axis, and a is greater than α; Figure 6 It is a schematic diagram of the local state when the push-pull rod pulls the positioning ring. In the figure, 0<β<α, and the angle a is the deflection angle of the hanger axis relative to the axis of the casing head body. When a is less than α, the positioning ring exerts a downward force on the deflection head. Figure 7 Schematic diagram of the local state when the push-pull rod pushes the positioning ring, in which -α<β<0, angle a is the deflection angle of the hanger axis relative to the casing head main body axis, and a is greater than α; Figure 8 It is a schematic diagram of the local state when the push-pull rod pushes the positioning ring. In the figure, -α<β<0, and the angle a is the deflection angle of the hanger axis relative to the casing head main body axis. When a is less than α, the positioning ring exerts a downward force on the deflection head. Fig. 9 Schematic diagram of the local state when the push-pull rod pulls the positioning ring, in which -α<β<0, angle a is the deflection angle of the hanger axis relative to the casing head main body axis, and a is greater than α; Fig.10 It is a schematic diagram of the local state when the push-pull rod pulls the positioning ring. In the figure, -α<β<0, the angle a is the deflection angle of the hanger axis relative to the casing head body axis, a is less than α, and the positioning ring forms a downward force on the deflection head.
[0018] Among them, the reference numerals in the figure are: 1-casing head body; 11-first annular cone; 12-side through hole; 2-hanger; 21-second annular cone; 22-positioning ring; 3-push-pull rod; 31-deflection head; 32-limiting groove; 33-pushing slide hole; 34-ball; 35-torsion spring; 4-adjusting screw; 41-screwing part; 51-connecting section; 52-matching section; 53-support section; 6-limiting casing; 100-casing head body axis; 200-hanger axis. DETAILED DESCRIPTION
[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0020] It should be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0021] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.
[0023] Please also read Figures 1 to 10 The combined multifunctional casing head device provided by the embodiment of the present application is now described. A combined multifunctional casing head device comprises: a casing head body 1, a hanger 2, a push-pull rod 3 and a control assembly.
[0024] The casing head body 1 has an installation cavity inside, and the inner wall of the installation cavity has a first annular cone 11 ; the side wall of the casing head body 1 has a side through hole 12 connected to the inside, and the side through hole 12 is located below the first annular cone 11 .
[0025] A second annular conical surface 21 is provided on the outer periphery of the lower end of the hanger 2 , and the second annular conical surface 21 is suitable for matching with the first annular conical surface 11 ; a positioning ring 22 is also provided on the lower end of the hanger 2 .
[0026] The push-pull rod 3 is arranged on the side wall of the casing head body 1 and slides radially along the casing head body 1, and is located above the side through hole 12 and below the first annular cone 11; the inner end of the push-pull rod 3 is provided with a limit groove 32; when the hanger 2 is installed in the casing head body 1, the positioning ring 22 enters the limit groove 32; the outer end of the push-pull rod 3 is provided with a push sliding hole 33 that penetrates radially.
[0027] The control component includes an adjusting screw 4 and a pushing slider; the adjusting screw 4 is obliquely arranged on the upper side wall of the side through hole 12, and a screwing portion 41 is provided at the outer end, and the outer end of the adjusting screw 4 is biased toward the outer opening of the side through hole 12 and exposes the screwing portion 41; the pushing slider is connected to the inner end of the adjusting screw 4, and passes through the pushing slide hole 33 to form a sliding fit, and the axis of the pushing slider is set at an acute angle to the axis of the adjusting screw 4 and the axis of the push-pull rod 3.
[0028] The adjusting screw 4 drives the push slider axially to drive the push-pull rod 3 to slide through the cooperation between the push slider and the push sliding hole 33, so that the limiting groove 32 drives the positioning ring 22 to move radially along the casing head body 1 to realize the lower end correction of the hanger 2.
[0029] Compared with the prior art, the combined multifunctional casing head device of the embodiment of the present application is different from the traditional adjustment from the top of the hanger 2. The embodiment of the present application corrects the deflection by adjusting the lower end of the hanger 2; by rotating the adjusting screw 4, the adjusting screw 4 axially drives the pushing slider. Since the axis of the pushing slider is set at an acute angle to the axis of the adjusting screw 4 and the axis of the push-pull rod 3, the pushing slider drives the push-pull rod 3 to move radially along the casing head body 1 through the driving slide hole, and then drives the positioning ring 22 at the lower end of the hanger 2 through the limit groove 32 of the push-pull rod 3, thereby radially adjusting the lower end of the hanger 2, which can conveniently correct the slight deflection of the hanger 2.
[0030] The adjusting screw 4 of the control assembly is obliquely arranged on the upper side wall of the side through hole 12, and the outer end is biased toward the outer opening of the side through hole 12 and exposed. It can be easily rotated from the outside without penetrating the side wall of the casing head body 1. No additional sealing is required, thereby ensuring the sealing and pressure-bearing capacity of the casing head body 1.
[0031] In this embodiment, the casing head body 1 is in the shape of a vertical circular tube, and connecting flanges are provided at both ends. A circle of steps is provided in the middle of the inner wall of the casing head body 1, and the step surface is a first annular cone surface 11. A side through hole 12 is provided on the side of the casing head body 1, and the side through hole 12 is located near the lower end of the casing head body 1 and below the first annular cone surface 11. A circle of bolt holes is provided at the outer end of the side through hole 12 for installing a pipeline or a valve through a flange.
[0032] On the inner wall of the casing head body 1, a radial hole is formed above the side through hole 12 and below the first annular cone surface 11 by punching, so that the push-pull rod 3 can slide radially after being installed. The end of the push-pull rod 3 facing the inside of the casing head body 1 is the inner end, and the end away from the inside of the casing head body 1 is the outer end. A limit groove 32 is set on the upper side of the inner end of the push-pull rod 3, and the cross-sectional shape of the limit groove 32 can be V-shaped, U-shaped, etc. A through push sliding hole 33 is set at the outer end of the push-pull rod 3 for the push slider to pass through. In a specific implementation, the push slide hole 33 and the push slider may have the same cross-sectional shape, the axial direction of the push slide hole 33 forms an acute angle with the axial direction of the push-pull rod 3, and the axes of the two coincide, so that the push slider and the push slide hole 33 form a relatively tight sliding fit; or the cross-sectional area of the push slide hole 33 may be larger than the cross-sectional area of the push slider, so that a certain gap is formed between the push slider and the push slide hole 33, and when the push slider slides, it can drive the push-pull rod 3 only after the gap is completed.
[0033] On the outside of the casing head body 1, an opening is formed from the outside of the side through hole 12, and a hole for installing a push slider is processed on the upper side wall of the side through hole 12 by punching. The hole intersects with the hole for installing the push-pull rod 3, so that the part of the push-pull rod 3 provided with the push sliding hole 33 passes through the hole, so that the push sliding block passes through the push sliding hole 33 after being installed in the installation hole.
[0034] The adjusting screw 4 is threadedly connected to the upper side wall of the side through hole 12, and the screwing portion 41 is exposed from the outer opening of the side through hole 12 by being inclined, so as to facilitate the screwing of the adjusting screw 4. The inner end of the adjusting screw 4 is connected to the push slider, and the specific connection method can be a rotating connection or a movable connection method such as a clamping connection, so that when the adjusting screw 4 is rotated, the push slider reciprocates along the mounting hole without rotating.
[0035] The axial direction of the pushing slider forms an acute angle with the axial direction of the adjusting screw 4, and the axial direction of the pushing slider forms an acute angle with the axial direction of the push-pull rod 3, so that when the adjusting screw 4 drives the pushing slider along its own axial direction, the part of the pushing slider located in the pushing slide hole 33 of the push-pull rod 3 drives the push-pull rod 3 to slide back and forth along its own axial direction.
[0036] The hanger 2 is used to hang the casing, and the specific hanging structure can refer to the slip type hanger 2, the mandrel type hanger 2, etc. on the market. The hanger 2 has a circular lower end, and a positioning ring 22 is added to the lower end. When the hanger 2 is installed in the casing head body 1 (roughly positioned), the positioning ring 22 can enter the limit groove 32, so that the adjusting screw 4 can be rotated, and the lower end of the hanger 2 can be pushed and pulled by the push-pull rod 3 to adjust the slight deflection of the hanger 2.
[0037] As a specific embodiment of the combined multifunctional casing head device provided in the present application, the casing head body 1 is provided with at least two side through holes 12, and the angle between adjacent side through holes 12 in the circumferential direction of the casing head body 1 is greater than or equal to 30° and less than or equal to 120°; at least two side through holes 12 are correspondingly provided with push-pull rods 3 and control components.
[0038] When the hanger 2 is installed in the casing head body 1 , different parts of the positioning ring 22 enter into the limiting grooves 32 of the push-pull rod 3 corresponding to different side through holes 12 .
[0039] In this embodiment, more than two push-pull rods 3 and control components can be used to adjust the lower end of the hanger 2 from at least two directions, making the adjustment more flexible. Moreover, the adjustment forces in the two directions at an angle can be combined into an adjustment force in any horizontal direction, so that the lower end of the hanger 2 can be adjusted in any horizontal direction. The angle between adjacent side through holes 12 in the circumferential direction of the casing head body 1 is greater than or equal to 30° and less than or equal to 120°, which minimizes the mutual influence between the adjustments in the two directions and is more convenient for operation.
[0040] In a specific implementation, the number of the side through holes 12 can be two, three or four. When two side through holes 12 are provided, the angle between the axes of adjacent side through holes 12 can be 90°, and push-pull rods 3 and control components are correspondingly arranged above the two side through holes 12. When three side through holes 12 are provided, the angle between the axes of adjacent side through holes 12 can be 60° (that is, the angle between adjacent side through holes 12 can be 60° or 120°), wherein push-pull rods 3 and control components are correspondingly arranged above the two side through holes 12, or push-pull rods 3 and control components are correspondingly arranged above the three side through holes 12. When four side through holes 12 are provided, the angle between the axes of adjacent side through holes 12 can be 45° (that is, the angle between adjacent side through holes 12 can be 45° or 90°), wherein push-pull rods 3 and control components are correspondingly arranged above the two adjacent side through holes 12, or push-pull rods 3 and control components are correspondingly arranged above the four side through holes 12.
[0041] See also Figures 3 to 10As a specific embodiment of the combined multifunctional casing head device provided in the present application, a deflection head 31 is rotatably provided at the inner end of the push-pull rod 3, and the deflection head 31 is deflected upward by an elastic structure, and a limiting groove 32 is provided on the upper side of the deflection head 31.
[0042] The maximum allowable deflection angle of the hanger axis 200 relative to the casing head body axis 100 is α, the angle between the outer side of the positioning ring 22 and the hanger axis 200 is β, and the angle between the inner side of the positioning ring 22 and the hanger axis 200 is -β, -α<β<α.
[0043] Generally speaking, the direction of the hanger deflection relative to the casing head body can be in any direction, so the maximum deflection angle α is an unsigned positive value. The positive and negative inclination angles of the outer and inner walls of the locating ring 22 are based on the hanger axis 200. When the outer wall of the locating ring 22 is tilted outward, β is positive, that is, Figure 3~Figure 6 When the outer wall of the positioning ring 22 is tilted inward, β is negative, that is, Figure 7~Figure 10 Similarly, the positive and negative inclination angle of the inner side wall of the positioning ring 22 can be determined.
[0044] During implementation, the deflection head 31 is deflected upward by the elastic structure, so that after the hanger 2 is installed in the casing head body 1, the positioning ring 22 at the lower end of the hanger 2 enters the limit groove 32 on the upper side of the deflection head 31. At this time, the push-pull rod 3 can be pushed or pulled along the radial direction of the casing head to drive the lower end of the hanger 2 to move in two opposite directions, thereby correcting the deviation. Specifically, when the hanger axis 200 is deflected relative to the casing head body axis 100, the direction of the deflection of the upper end of the hanger 2 is the positive direction, and the direction of the deflection of the lower end is the reverse direction. It is necessary to use the push-pull rod 3 on the reverse side to push the positioning ring 22 at the lower end of the hanger 2, or use the push-pull rod 3 on the forward side to pull the positioning ring 22 at the lower end of the hanger 2. Figures 3 to 10 This is shown in a more obvious way. The angles in the figure do not represent the actual angle values, but only represent the size relationship between the angles.
[0045] Reference Figure 3 and 4If the push-pull rod 3 on the reverse side is used for adjustment, when the deflection angle of the hanger axis 200 relative to the casing head main body axis 100 exceeds α (that is, when the requirement is not met), the outer side surface of the corresponding part of the positioning ring 22 is in a state of being biased upward. In this state, when the push-pull rod 3 pushes the positioning ring 22 in the forward direction, the side wall of the limit groove 32 of the deflection head 31 abuts against the outer side surface of the positioning ring 22, so that the deflection head 31 forms an upward deflection force, so that the deflection head 31 will not be separated from the positioning ring 22. As the push-pull rod 3 pushes the lower end of the hanger 2 forward, the deflection angle of the hanger 2 is gradually corrected to be less than α (i.e., the requirement has been met), but still greater than β. At this time, the outer side surface of the positioning ring 22 is still in a state of being biased upward. Continuing to push the push-pull rod 3, the hanger 2 will continue to correct the deflection until the deflection angle of the hanger 2 is less than β. At this time, the outer side surface of the positioning ring 22 becomes an inclined surface biased downward. If the push-pull rod 3 is continued to be pushed, the outer side surface of the positioning ring 22 will form a downward deflection force on the deflection head 31, causing the deflection head 31 to deflect downward and thus disengage from the positioning ring 22, so that the angle of the hanger 2 will no longer change, thereby preventing the operator from over-adjusting the hanger 2.
[0046] Reference Figure 7 and 8 , the figure shows the case where β is a negative value. In this case, when the deflection angle of the hanger axis 200 relative to the casing head main body axis 100 exceeds α (that is, when the requirement is not met), the outer side surface of the corresponding part of the positioning ring 22 is also in a state of being biased upward, until the push-pull rod 3 pushes the hanger 2 to form a reverse deflection. At this time, due to -α<β, when the reverse deflection angle of the hanger 2 has not reached -α (that is, the reverse deflection angle does not exceed the maximum allowable deflection angle), the outer side surface of the positioning ring 22 becomes an inclined surface biased downward. If the push-pull rod 3 continues to be pushed, the outer side surface of the positioning ring 22 will form a downward deflection force on the deflection head 31, causing the deflection head 31 to deflect downward and thus disengage from the positioning ring 22, so that the angle of the hanger 2 will no longer change, thereby preventing the operator from over-adjusting the hanger 2.
[0047] Reference Figure 5 and 6If the push-pull rod 3 on the positive side is used for adjustment, when the deflection angle of the hanger axis 200 relative to the casing head main body axis 100 exceeds α (that is, when the requirement is not met), the inner side surface of the corresponding part of the positioning ring 22 is in a state of being biased upward. In this state, when the push-pull rod 3 pulls the positioning ring 22 in the positive direction, the side wall of the limit groove 32 of the deflection head 31 is against the inner side surface of the positioning ring 22, so that the deflection head 31 forms an upward deflection force, so that the deflection head 31 will not be separated from the positioning ring 22. When the deflection angle of the hanger 2 is gradually corrected to be less than α (that is, the requirement has been met) but still greater than β, the inner side surface of the positioning ring 22 is still in a state of being biased upward. Continuing to pull the push-pull rod 3 will allow the hanger 2 to continue to correct the deflection until the deflection angle of the hanger 2 is less than β. At this time, the inner side surface of the positioning ring 22 becomes an inclined surface biased downward. If the push-pull rod 3 is continued to be pulled, the inner side surface of the positioning ring 22 will form a downward deflection force on the deflection head 31, causing the deflection head 31 to deflect downward and thus disengage from the positioning ring 22, so that the angle of the hanger 2 will no longer change, thereby preventing the operator from over-adjusting the hanger 2.
[0048] Reference Fig. 9 and 10 , the figure shows the case where β is a negative value. In this case, when the deflection angle of the hanger axis 200 relative to the casing head main body axis 100 exceeds α (that is, when the requirement is not met), the inner side surface of the corresponding part of the positioning ring 22 is also in a state of being biased upward, until the push-pull rod 3 pushes the hanger 2 to form a reverse deflection. At this time, since -α<β, when the reverse deflection angle of the hanger 2 has not reached -α (that is, the reverse deflection angle does not exceed the maximum allowable deflection angle), the inner side surface of the positioning ring 22 is in a state of being biased downward. If the push-pull rod 3 continues to be pushed, the inner side surface of the positioning ring 22 will form a downward deflection force on the deflection head 31, causing the deflection head 31 to deflect downward and thus disengage from the positioning ring 22, so that the angle of the hanger 2 will no longer change, thereby preventing the operator from over-adjusting the hanger 2. Refer to Figures 3 to 6 In another embodiment, 0<β<α, so that when the deflection angle of the hanger 2 is gradually corrected to be less than α (that is, when the requirement has been met), continuing to push or pull the push-pull rod 3 will cause the deflection head 31 to deflect downward and disengage from the positioning ring 22, so that the angle of the hanger 2 will no longer change, thereby preventing the operator from over-adjusting the hanger 2.
[0049] The above is an ideal situation. In actual implementation, since the deflection direction of the hanger 2 is random and not always exactly in the direction of the push-pull rod 3, β is usually set to be smaller than α to a certain extent, so that even if the deflection direction of the hanger 2 deviates from the direction of the push-pull rod 3, the push-pull rod 3 can be pushed and pulled to a range that meets the requirements. Of course, as the number of side through holes 12 and corresponding push-pull rods 3 increases, the value of β can be set closer to α.
[0050] According to actual installation experience, when the deflection angle of the hanger 2 is within 5°, the sealing ring on the outer periphery usually will not have a large misalignment, so the maximum allowable deflection angle α can be set to 5°. In the case of two mutually perpendicular push-pull rods 3, β can usually adopt angles such as 3°, 4°, -3°, and -4°.
[0051] See also Figures 2 to 10 As a specific embodiment of the combined multifunctional casing head device provided in the present application, the cross-section of the limiting groove 32 is rectangular, and balls 34 are embedded on the two side walls, and the balls 34 on the two side walls are respectively opposite to the two side surfaces of the positioning ring 22.
[0052] In this embodiment, by arranging balls 34 on the inner and outer walls of the limiting groove 32, the friction between the inner and outer sides of the positioning ring 22 and the inner and outer walls of the limiting groove 32 is reduced, so that when the inner or outer side of the positioning ring 22 is in a state of being biased upward, it is easier to push the deflection head 31 to deflect downward and thus detach from the positioning ring 22. During actual installation, low-viscosity lubricating oil can be applied in advance to the balls 34 and the rotating shaft of the deflection head 31 to further reduce friction.
[0053] See also Figures 2 to 10 This is a specific implementation of the combined multifunctional casing head device provided in the present application. When the deflection head 31 is in a free state, the opening of the limiting groove 32 is horizontal.
[0054] See also Figure 2 As a specific implementation of the combined multifunctional casing head device provided in the present application, the elastic structure is a torsion spring 35 arranged at the rotating shaft of the deflection head 31.
[0055] As a specific implementation of the combined multifunctional casing head device provided in the present application, the positioning ring 22 and the hanger 2 are designed as separate bodies and are connected in a later installation manner.
[0056] In this embodiment, the positioning ring 22 and the hanger 2 are designed as separate bodies, and the positioning ring 22 can be installed on the existing hanger 2 in a retrofit manner, thereby directly utilizing the existing hanger 2. In the embodiment, the retrofit manner can be bolt connection, welding, clamping, and other installation methods.
[0057] See also Figure 2 As a specific embodiment of the combined multifunctional casing head device provided in the present application, an inclined mounting hole is provided on the upper side wall of the side through hole 12, and the opening of the mounting hole is biased toward the outer opening of the side through hole 12 and exposed.
[0058] An eccentric supporting sliding hole is arranged at the bottom of the mounting hole, and the axis of the supporting sliding hole is parallel to the axis of the mounting hole.
[0059] In the axial direction of the mounting hole, the vertical projection of the supporting sliding hole falls within the outer contour of the mounting hole; the portion of the push-pull rod 3 provided with the pushing sliding hole 33 crosses through the mounting hole.
[0060] In this embodiment, the mounting hole can be processed by drilling from the outer opening of the side through hole 12, and then a support sliding hole can be processed at an eccentric position at the bottom of the mounting hole using a drill bit with a smaller diameter, thereby reducing the processing difficulty.
[0061] In a specific implementation, the hole where the push-pull rod 3 is located intersects with the mounting hole, so that the outer end portion of the push-pull rod 3 provided with the push sliding hole 33 passes through the mounting hole.
[0062] See also Figure 2 As a specific embodiment of the combined multifunctional casing head device provided in the present application, the pushing slider includes a connecting section 51, a matching section 52 and a supporting section 53 which are connected in sequence. The axis of the matching section 52 is set at an acute angle to the axis of the connecting section 51, and the axis of the supporting section 53 is parallel to the axis of the connecting section 51.
[0063] On the radial plane of the connecting segment 51 , the vertical projection of the matching segment 52 and the vertical projection of the supporting segment 53 both fall within the outer contour of the connecting segment 51 .
[0064] On the radial plane of the matching segment 52 , the vertical projection of the supporting segment 53 falls within the outer contour of the matching segment 52 .
[0065] The connecting section 51 is slidably matched with the mounting hole, the matching section 52 passes through the pushing sliding hole 33 , and the supporting section 53 is slidably matched with the pushing sliding hole 33 .
[0066] In this embodiment, the pushing slider can be directly inserted from the opening of the mounting hole as a whole, and the matching section 52 passes through the pushing slide hole 33, and the supporting section 53 is inserted into the pushing slide hole 33, thereby reducing the difficulty of assembly.
[0067] In a specific implementation, the connecting section 51, the matching section 52 and the supporting section 53 are an integrated structure, which are formed by turning.
[0068] See also Figure 2 As a specific embodiment of the combined multifunctional sleeve head device provided in the present application, the open end of the mounting hole is threadedly connected to a limit sleeve 6, the limit sleeve 6 limits the maximum distance of the push slider sliding outward, and the adjusting screw 4 is threadedly connected to the limit sleeve 6.
[0069] In this embodiment, after the hanger 2 is adjusted into place, the limiting sleeve 6 can be removed, thereby disassembling the limiting sleeve 6, the adjusting screw 4 and the pushing slider, recovering the parts, and reducing the fluid resistance of the side through hole 12.
[0070] In the specific implementation, the adjusting screw 4 is installed in the limiting sleeve 6, and the pushing slider is installed at the end of the adjusting screw 4. Then the pushing slider is inserted into the mounting hole, and the limiting sleeve 6 is rotated so that the limiting sleeve 6 is fixed to the open end of the mounting hole through threads to complete the installation.
[0071] In addition, during use, depending on the usage, it is also possible not to disassemble the limiting sleeve 6, the adjusting screw 4 and the pushing slider. For this usage, a sink groove can be provided at the opening of the mounting hole to reduce the height of the adjusting screw 4 and the limiting sleeve 6 protruding from the inner wall of the side through hole 12, thereby reducing fluid resistance.
[0072] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A combined multifunctional casing head device, characterized in that: include: The casing head body has a mounting cavity inside, and the inner wall of the mounting cavity is provided with a first annular cone surface; the side wall of the casing head body is provided with a side through hole connected with the interior, and the side through hole is located below the first annular cone surface; The hanger has a second annular conical surface on the outer periphery of the lower end, and the second annular conical surface is suitable for matching with the first annular conical surface; the lower end of the hanger is also provided with a positioning ring; A push-pull rod is provided on the side wall of the casing head body and slides radially along the casing head body, and is located above the side through hole and below the first annular cone surface; a limiting groove is provided at the inner end of the push-pull rod; when the hanger is installed in the casing head body, the positioning ring enters the limiting groove; a push sliding hole is provided at the outer end of the push-pull rod and penetrates radially; A control assembly, comprising an adjusting screw and a pushing slider; the adjusting screw is obliquely arranged on the upper side wall of the side through hole, and a screwing portion is arranged at the outer end, and the outer end of the adjusting screw is biased toward the outer opening of the side through hole and exposes the screwing portion; the pushing slider is connected to the inner end of the adjusting screw and passes through the pushing slide hole to form a sliding fit, and the axis of the pushing slider is arranged at an acute angle to the axis of the adjusting screw and the axis of the push-pull rod; The adjusting screw drives the pushing slider axially to drive the push-pull rod to slide through the cooperation between the pushing slider and the pushing sliding hole, so that the limiting groove drives the positioning ring to move radially along the casing head body to realize the lower end deviation correction of the hanger.
2. The combined multifunctional casing head device according to claim 1, characterized in that: The casing head body is provided with at least two side through holes, and the included angle between adjacent side through holes in the circumferential direction of the casing head body is greater than or equal to 30° and less than or equal to 120°; at least two of the side through holes are correspondingly provided with the push-pull rod and the control assembly; When the hanger is installed in the casing head body, different parts of the positioning ring respectively enter the limiting grooves of the push-pull rods corresponding to different side through holes.
3. The combined multifunctional casing head device according to claim 1, characterized in that: The inner end of the push-pull rod is rotatably provided with a deflection head, and the deflection head is deflected upward by an elastic structure, and the limiting groove is provided on the upper side of the deflection head; The maximum allowable deflection angle of the hanger axis relative to the casing head body axis is α, the angle between the outer side of the positioning ring and the hanger axis is β, and the angle between the inner side of the positioning ring and the hanger axis is -β, -α<β<α.
4. The combined multifunctional casing head device according to claim 3, characterized in that: The cross section of the limiting groove is rectangular, and balls are embedded on the two side walls, and the balls on the two side walls are respectively opposite to the two side surfaces of the positioning ring.
5. The combined multifunctional casing head device according to claim 4, characterized in that: When the deflection head is in a free state, the opening of the limiting groove is horizontal.
6. The combined multifunctional casing head device according to claim 3, characterized in that: The elastic structure is a torsion spring arranged at the rotation axis of the deflection head.
7. The combined multifunctional casing head device according to claim 1, characterized in that: The positioning ring and the hanger are designed as separate parts and are connected in a retrofitting manner.
8. The combined multifunctional casing head device according to claim 1, characterized in that: An inclined mounting hole is provided on the upper side wall of the side through hole, and the opening of the mounting hole is biased toward the outer opening of the side through hole and exposed; An eccentric supporting sliding hole is arranged at the bottom of the mounting hole, and the axis of the supporting sliding hole is parallel to the axis of the mounting hole; In the axial direction of the mounting hole, the vertical projection of the supporting sliding hole falls within the outer contour of the mounting hole; the portion of the push-pull rod provided with the pushing sliding hole crosses through the mounting hole.
9. The combined multifunctional casing head device according to claim 8, characterized in that: The push slider comprises a connecting section, a matching section and a supporting section which are connected in sequence, the axis of the matching section is arranged at an acute angle with the axis of the connecting section, and the axis of the supporting section is parallel to the axis of the connecting section; On the radial plane of the connecting section, the vertical projection of the matching section and the vertical projection of the supporting section both fall within the outer contour of the connecting section; On the radial plane of the matching segment, the vertical projection of the supporting segment falls within the outer contour of the matching segment; The connecting section is slidably matched with the mounting hole, the matching section passes through the pushing sliding hole, and the supporting section is slidably matched with the pushing sliding hole.
10. The combined multifunctional casing head device according to claim 9, characterized in that: The open end of the mounting hole is threadedly connected to a limiting sleeve, the limiting sleeve limits the maximum distance of the push slider sliding outward, and the adjusting screw is threadedly connected in the limiting sleeve.