Expansion hanger with longitudinal offset prevention structure

Abstract

The utility model belongs to the technical field of hangers, and particularly relates to an expansion hanger with a longitudinal deviation prevention structure, which comprises a first connecting disc, a connecting port fixedly connected to the top end of the first connecting disc, a first connecting seat fixedly connected to the bottom end of the first connecting disc, and a second connecting seat fixedly connected to the lower surface of the first connecting seat. An auxiliary mechanism is arranged between the connecting seat I and the connecting seat II; by arranging the auxiliary mechanism, the correct position of the oil pipe in a well is ensured, the problem caused by deviation of the oil pipe can be prevented, the problem that the oil pipe is inclined and is difficult to make full contact with a sealing piece is effectively solved through the rotating design of the second sleeve in the installation cavity, and therefore the sealing effect is ensured, and the service life of the oil pipe is prolonged. The device can stably operate for a long time in a severe underground environment, and the frequency of maintenance and replacement is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hanger, especially with the expansion hanger of preventing longitudinal deviation structure. BACKGROUND

[0002] The hanger is an essential part of the Christmas tree, which is located in the Christmas tree, and its function is to suspend the tubing string and seal with the Christmas tree body to form an annular hole and a production channel, and also provides an interface and a channel for downhole control.

[0003] At present, the expansion hanger is deformed and closely attached to the tubing wall when the sealing element is deformed, which ensures the sealing effect, but under the action of the actual running resistance, the hanger is easily affected by the tubing deviation pressure when the tubing moves, which causes the hanger to deviate in the vertical direction, thereby causing the problem that the hanger is difficult to fully contact and seal with the sealing element.

[0004] In view of the above technical defects, the present solution is proposed. SUMMARY

[0005] The utility model discloses a kind of expansion hangers with the prevention of longitudinal deviation structure, by setting auxiliary mechanism, ensure the correct position of tubing in well, prevent from being inclined due to tubing deviation, cause the problem that it is difficult to fully contact with sealing element, to solve the problem proposed in background art.

[0006] The utility model discloses a kind of expansion hangers with the prevention of longitudinal deviation structure, by setting auxiliary mechanism, ensure the correct position of tubing in well, prevent from being inclined due to tubing deviation, cause the problem that it is difficult to fully contact with sealing element, to solve the problem proposed in background art.

[0007] The auxiliary mechanism includes an installation cavity between the connecting seat one and the connecting seat two, a worm wheel is rotatably connected in the installation cavity, the worm wheel is penetrated and vertically slidably connected with a sleeve two, the center of the sleeve two is penetrated and fixedly connected with a connecting sleeve, the connecting seat two bottom is provided with vertically extending sleeve one, and the bottom of the sleeve one is connected with wellhead big four-way.

[0008] Preferably, a worm is rotatably connected in the installation cavity, the worm is engaged with the worm wheel, and a motor one for driving the worm to rotate is fixedly installed on one side of the outer wall of the connecting seat one.

[0009] Preferably, the outer wall of the sleeve two is fixedly connected with two symmetrically arranged key strips, and the inner wall of the worm wheel is provided with a sliding groove matched with the key strip.

[0010] Preferably, one side of the outer wall of the sleeve one is fixedly provided with a motor two, the sleeve one is internally provided with an eccentric disc, the output end of the motor two is fixedly provided with a connecting shaft, and one end of the connecting shaft penetrates through the side wall of the sleeve one and is fixedly connected with the outer surface of the eccentric disc.

[0011] Preferably, the lower surface of the connecting seat is provided with a cavity corresponding to the mounting cavity, and the upper surface and the lower surface of the sleeve two are both provided with an annular piece.

[0012] Preferably, the bottom of the sleeve one is internally provided with a mounting sleeve arranged in an annular array on one side, the mounting sleeve and the inner wall of the connecting seat one are penetrated and vertically limitedly and slidably connected with a limiting column, the limiting column is fixedly connected with the corresponding annular piece, and a spring is sleeved on the outer contour of the limiting column and abuts against the annular piece.

[0013] The utility model discloses the beneficial effects of:

[0014] (1) the utility model discloses a auxiliary mechanism is set up, ensures the correct position of oil pipe in well, helps preventing the problem caused by the deviation of oil pipe, the rotation design of sleeve two in the mounting cavity effectively prevents the problem that oil pipe is inclined and is difficult to fully contact sealing element, thereby guaranteeing the sealing effect, can long -term stable operation in the harsh downhole environment, reduces the frequency of maintenance and replacement.

[0015] (2) through setting up elasticity, ensure its effective reset after moving, and the buffer and reset mechanism help to reduce the damage of hanger caused by impact or vibration, improve the durability and reliability of hanger. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model makes further explanation from the following combined with the drawings;

[0017] Figure 1 It is the whole structure of the utility model three-dimensional Figure 1 ;

[0018] Figure 2 It is the whole structure of the utility model three-dimensional Figure 2 ;

[0019] Figure 3 It is the internal structure diagram of the mounting cavity of the utility model;

[0020] Figure 4 It is the structure diagram of sleeve two of the utility model;

[0021] Figure 5 It is the structure diagram of connecting seat one of the utility model;

[0022] Figure 6 It is the whole cross section structure diagram of the utility model.

[0023] Figure legend: 1, connecting disc one; 2, connecting seat one; 3, connecting port; 4, connecting seat two; 5, sleeve one; 6, installation cavity; 7, motor two; 8, worm gear; 9, worm; 10, sleeve two; 11, connecting sleeve; 12, eccentric disc; 13, limiting column; 14, spring; 15, mounting sleeve; 16, annular sheet. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] Embodiment one: the embodiment is used to solve the problem that the hanger in the prior art is easily affected by the deviation pressure of the oil pipe, which causes the hanger to deviate in the vertical direction, thereby making it difficult for the hanger to fully contact and seal with the sealing element.

[0026] Please refer to Figure 1 - Figure 5 As shown in the figure, the embodiment is an expansion hanger with a longitudinal deviation prevention structure, which comprises a connecting disc one 1, the top end of the connecting disc one 1 is fixedly connected with a connecting port 3, the bottom end of the connecting disc one 1 is fixedly connected with a connecting seat one 2, the lower surface of the connecting seat one 2 is fixedly connected with a connecting seat two 4, and an auxiliary mechanism is arranged between the connecting seat one 2 and the connecting seat two 4.

[0027] The auxiliary mechanism comprises an installation cavity 6 located between the connecting seat one 2 and the connecting seat two 4, a worm gear 8 is rotatably connected in the installation cavity 6, the worm gear 8 is penetrated and vertically slidably connected with a sleeve two 10, the center of the sleeve two 10 is penetrated and fixedly connected with a connecting sleeve 11, a sleeve one 5 vertically extending is arranged at the bottom end of the connecting seat two 4, and a wellhead four-way is connected at the bottom end of the sleeve one 5, and the expansion hanger is arranged in the wellhead four-way.

[0028] When the sleeve two 10 moves in the vertical direction, the vertical direction of the oil pipe can be positioned, when the sleeve two 10 reciprocally moves in the vertical direction, the vertical direction of the oil pipe can be corrected, and when the sleeve two 10 rotates in the installation cavity 6, the oil pipe is prevented from tilting and being difficult to fully contact with the sealing element.

[0029] A worm 9 is fixedly connected in the installation cavity 6, the worm 9 is engaged with the worm gear 8, a motor one is fixedly installed on one side of the outer wall of the connecting seat one 2 to drive the worm 9 to rotate, the motor one is started, the motor one drives the worm 9 to rotate, which can make the worm gear 8 engaged with the worm 9 rotate, the sleeve two 10 is driven to rotate through the rotation of the worm gear 8, and the auxiliary hanger is prevented from deviating.

[0030] The outer wall of the sleeve two 10 is fixedly connected with two symmetrical key strips, the inner wall of the worm wheel 8 is provided with a sliding groove matched with the key strips, the key strips are matched with the sliding groove on the worm wheel 8, the vertical direction of the sleeve two 10 can be limited, and the sleeve two 10 can be stably moved in the vertical direction.

[0031] The outer wall of the sleeve one 5 is fixedly connected with the motor two 7, the sleeve one 5 is internally provided with the eccentric disc 12, the output end of the motor two 7 is fixedly connected with a connecting shaft, one end of the connecting shaft penetrates through the side wall of the sleeve one 5 and is fixedly connected with the outer surface of the eccentric disc 12, the motor two 7 is started, the motor two 7 rotates and drives the eccentric disc 12 in the sleeve one 5 to rotate, the eccentric disc 12 rotates and drives the sleeve two 10 to move in the vertical direction, so that the oil pipe in different positions is corrected.

[0032] Embodiment two: The embodiment is used to solve the problem of improving the stability of the expansion hanger.

[0033] Please refer to Figure 1 - Figure 5 As shown in the figure, the expansion hanger with the longitudinal offset prevention structure comprises a cavity body formed in the lower surface of the connecting seat one 2 and matched with the mounting cavity 6, and annular pieces 16 arranged on the upper surface and the lower surface of the sleeve two 10. By arranging the annular pieces 16, the vertical movement of the annular pieces 16 can be buffered and reset, so that the sleeve two 10 can move reciprocally in the vertical direction.

[0034] The bottom side of the sleeve one 5 is arranged with annularly distributed mounting sleeves 15, the mounting sleeves 15 and the inner wall of the connecting seat one 2 are penetrated and vertically limited and slidably connected with limiting columns 13, the limiting columns 13 are fixedly connected with the corresponding annular pieces 16, the limiting columns 13 are sleeved with springs 14 matched with the annular pieces 16, and the top and the bottom side of the sleeve two 10 are provided with the springs 14. Under the action of the springs 14, the sleeve two 10 reciprocally pushed by the eccentric disc 12 can be reset, so that the sleeve two 10 can move reciprocally in the vertical direction.

[0035] Combining embodiment one and embodiment two

[0036] By arranging the auxiliary mechanism, the correct position of the oil pipe in the well is ensured, the rotation design of the sleeve two 10 in the mounting cavity 6 effectively prevents the problem that the oil pipe is inclined and difficult to be in full contact with the sealing element, ensures that the sealing element can be closely attached to the oil pipe in any state, thereby guaranteeing the sealing effect, and enables the oil pipe to stably operate for a long time in a harsh downhole environment, reduces the frequency of maintenance and replacement, and ensures the effective reset of the oil pipe after movement by arranging the elastic connection. The buffering and resetting mechanism helps to reduce the damage of the hanger caused by impact or vibration, and improves the durability and reliability of the hanger.

[0037] As Figure 1 Figure 5 The working process and principle of the utility model are as follows:

[0038] Step 1: start the motor 1 on the outer wall of the connecting disc 1, the motor 1 drives the worm 9 to rotate, which can make the worm gear 8 meshing with the worm 9 rotate, and through the rotation of the worm gear 8, the sleeve 2 10 is driven to rotate, the sleeve 2 10 and the connecting sleeve 11 rotate around the oil pipe, and the vertical direction of the oil pipe is corrected, which prevents the oil pipe from tilting and making full contact with the sealing element, and the motor 2 7 is started, the motor 2 7 rotates and drives the eccentric disc 12 in the sleeve 1 5 to rotate, the eccentric disc 12 rotates and drives the sleeve 2 10 to move in the vertical direction, so as to realize the correction operation of the oil pipe at different positions.

[0039] The above content is only an example and description of the structure of the application, and those skilled in the art can make various modifications or supplements or use similar ways to replace the described specific embodiments, as long as they do not deviate from the structure of the application or exceed the scope defined by the claims.

[0040] In the description of the present application, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details and limit the application to the specific embodiments. Obviously, many modifications and changes can be made according to the content of the present application. The present application selects and describes these embodiments in order to better explain the principles and practical application of the present application, so that those skilled in the art can well understand and use the present application. The present application is limited by the claims and their entire scope and equivalents.​

Claims

1. An expansion hanger having a longitudinal misalignment prevention structure, comprising a connecting disc (1), characterized in that, The connecting disc one (1) top fixedly connected with the connecting port (3), the connecting disc one (1) bottom fixedly connected with the connecting seat one (2), the connecting seat one (2) lower surface fixedly connected with the connecting seat two (4), the connecting seat one (2) and the connecting seat two (4) between the setting auxiliary mechanism, the auxiliary mechanism includes the installation cavity (6) between the connecting seat one (2) and the connecting seat two (4), the installation cavity (6) in fixed shaft rotationally connected with the worm wheel (8), the worm wheel (8) is penetrated and vertically slidingly connected with the sleeve two (10), the sleeve two (10) center is penetrated and fixedly connected with the connecting sleeve (11), the connecting seat two (4) bottom is provided with the vertically extending sleeve one (5), the bottom of the sleeve one (5) is connected with the wellhead big four-way.

2. The inflatable hanger with anti-longitudinal shift structure according to claim 1, characterized in that, The installation cavity (6) in fixed shaft rotationally connected with the worm (9), the worm (9) and the worm wheel (8) are engaged, the connecting seat one (2) outer wall one side fixedly installed with the motor one of driving worm (9) rotation.

3. The expanded hanger with a longitudinal offset prevention structure according to claim 1, wherein, The sleeve two (10) outer wall fixedly connected with two symmetrically arranged key strips, the worm wheel (8) inner wall is provided with the sliding groove matched with the key strip.

4. The expanded hanger with a longitudinal offset prevention structure according to claim 1, wherein The sleeve one (5) outer wall one side fixedly installed with the motor two (7), the sleeve one (5) is provided with eccentric disc (12), the output end of the motor two (7) is fixed with the connecting shaft, and one end of the connecting shaft penetrates the side wall of the sleeve one (5) and is fixedly connected with the outer surface of the eccentric disc (12).

5. The expanded hanger with a longitudinal offset prevention structure according to claim 1, wherein The connecting seat one (2) lower surface is provided with the cavity corresponding with the installation cavity (6), the sleeve two (10) upper surface and lower surface are provided with the annular sheet (16).

6. The expanded hanger with a longitudinal offset prevention structure according to claim 1, wherein The bottom one side of the sleeve one (5) is annularly arranged with the mounting sleeve (15), the mounting sleeve (15) and the inner wall of the connecting seat one (2) are penetrated and vertically limit slidingly connected with the limiting column (13), the limiting column (13) is fixedly connected with the corresponding annular sheet (16), the limiting column (13) is provided with the spring (14) on the outer contour, and the spring (14) is abutted with the annular sheet (16).

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