A casing head hanger, a casing head and a method for using the same

Abstract

The present invention discloses a casing head hanger, a casing head and a using method thereof, which relate to the technical field of petroleum equipment. It includes a casing shell; a suspension pipe is arranged inside the casing shell; a stepped pipe is arranged on the inner side of the casing shell, and the lower end of the outer side of the suspension pipe is matched with the stepped pipe; a plurality of auxiliary devices are evenly distributed along the ring inside the casing shell; the auxiliary device at the right end includes an adjusting column; the adjusting column penetrates through the right side of the casing shell horizontally, and the adjusting column is rotationally connected with the casing shell; at the position of the adjusting column, a sliding groove is opened inside the casing shell; a sliding strip is slidably connected inside the sliding groove, and a threaded hole is opened on the right side of the sliding strip. The beneficial effect of the present invention is that during use, it can be adjusted to better limit the suspension for use and assist in better anti-rotation limit.

Description

Technical Field

[0001] The present invention relates to the technical field of petroleum equipment, and in particular to a casing head hanger, a casing head and a use method thereof. Background Art

[0002] Casing hangers come in two types: slip and mandrel. They are used to secure casing during oil extraction. Traditional hangers have a large opening when lowering casing into the well, making it easy for the casing to wobble. They lack a position-limiting mechanism, making it difficult to insert the casing if it tilts due to shaking. Furthermore, after the casing and hanger are placed into the casing head, there is no rotation limit, making it inconvenient to use and difficult to properly hang the casing. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a casing head hanger and a casing head and a method for using the same, which can be adjusted to better prevent the casing head from rotating during use.

[0004] The technical solution adopted by the present invention is: to provide a casing head hanger, comprising a casing shell; a hanging tube is provided in the casing shell; a stepped tube is provided inside the casing shell, and the lower end of the outer side of the hanging tube cooperates with the stepped tube; a plurality of auxiliary devices are evenly distributed along the ring inside the casing shell; the auxiliary device at the right end includes an adjusting column; the adjusting column penetrates the right side of the casing shell laterally, and the adjusting column is rotatably connected to the casing shell; a slide groove is opened in the casing shell; a slide bar is slidably connected in the slide groove, and a threaded hole is opened on the right side of the slide bar; the adjusting column is threadedly connected to the slide bar in the slide groove; the left end of the slide bar is rotatably connected to multiple auxiliary gears through a rotating shaft; multiple auxiliary gears are all cooperated with the hanging tube; the right end of the adjusting column is fixedly connected to the driven gear; a circle recording device that cooperates with the auxiliary gear is provided on the casing shell; all auxiliary devices are evenly distributed along the ring and have the same structure; an annular gear ring is rotatably connected to the outer side of the casing shell, and the annular gear ring is meshed with the driven gear; a limiting device is provided on the annular gear ring.

[0005] To further optimize the technical solution, a circle counting device of a casing head hanger includes a circle counting gear; the circle counting gear is fixedly connected to an auxiliary gear.

[0006] To further optimize this technical solution, a casing head hanger also includes multiple limit columns that cooperate with the adjusting columns; the limit columns all penetrate the driven gear and the adjusting column, and the limit columns are threadedly connected to the driven gear and the adjusting column; through holes that cooperate with the limit columns are opened in the sliding bars; the limit columns all correspond to the circle counting gears.

[0007] To further optimize the technical solution, a casing shell of a casing head hanger is provided with a counting module, and the counting module cooperates with a circle counting gear.

[0008] To further optimize this technical solution, the teeth of the auxiliary gear of a casing head hanger are in a forward-tilted shape.

[0009] To further optimize this technical solution, a worm is rotatably connected to the outside of the casing shell of a casing head hanger; a worm gear ring meshing with the worm is provided on the annular gear ring.

[0010] To further optimize this technical solution, a control rod is provided on the worm of a casing head hanger.

[0011] To further optimize this technical solution, the mating parts of the stepped pipe and the hanging pipe of a casing head hanger are all in the shape of stepped chamfers.

[0012] Another technical solution adopted by the present invention is to provide a casing head, comprising: the casing head hanger described in any one of the above.

[0013] A method for using a casing head hanger and a casing head is adopted, and the steps are as follows:

[0014] Step 1: Connect the hanging pipe and the casing and place them into the casing shell.

[0015] Step 2: The hanging pipe passes through the auxiliary gear, the auxiliary gear rotates, the adjusting column is rotated, and the slide bar drives the auxiliary gear to move to limit the hanging pipe.

[0016] Step 3: The hanging pipe makes multi-point contact with the stepped pipe, and the stepped pipe limits the hanging pipe.

[0017] Step 4: Rotate the limit column, the limit column moves through the adjusting column and the driven gear connected by threads, the limit column then contacts the counting gear through the through hole on the slide bar, the limit column drives the counting gear to rotate, and further limits the outside of the hanging pipe through the auxiliary gear.

[0018] Step 5: Stop rotating the limit column to limit the rotation of the auxiliary gear.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. The cooperation of the hanging pipe, the casing shell, the auxiliary gear, the counting gear, and the counting module is used for counting, so as to count the number of turns of the auxiliary gear, which is convenient for auxiliary counting use;

[0021] 2. The cooperation of the adjusting column, the slide bar, the sliding groove, the auxiliary gear, and the hanging pipe, multiple auxiliary gears are attached to and limit the hanging pipe, preventing the hanging pipe from shaking and tilting, which is convenient for better hanging the casing;

[0022] 3. The multi-point contact according to the shapes of the suspension pipe and the stepped pipe facilitates better force application and more convenient suspension use; the cooperation of the ring gear, driven gear, adjusting column, auxiliary gear, and suspension pipe facilitates better control during use; the arrangement of the worm and the worm gear ring prevents the adjusting column and the ring gear from rotating.

[0023] 4. The cooperation of the limit post, adjusting column, driven gear, slide bar, through hole, counting gear, and suspension pipe facilitates better suspension use, and according to the structure of the auxiliary gear, it also prevents the suspension pipe from rotating, facilitating anti-rotation and limiting use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the present invention;

[0025] Figure 2 is a schematic structural diagram of the worm part of the present invention;

[0026] Figure 3 is a schematic internal structural diagram of the present invention;

[0027] Figure 4 is a schematic structural diagram of the slide bar part of the present invention;

[0028] Figure 5 is a schematic partial exploded structural diagram of the present invention;

[0029] Figure 6 is a schematic partial exploded structural diagram of the present invention from another perspective;

[0030] In the figure, 1. casing shell; 2. suspension pipe; 3. stepped pipe; 4. adjusting column; 5. sliding groove; 6. slide bar; 7. threaded hole; 8. auxiliary gear; 9. driven gear; 10. ring gear; 11. counting gear; 12. limit post; 13. through hole; 14. counting module; 15. worm; 16. worm gear ring; 17. control rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0032] As Figures 1-6As shown in the figure, a casing head hanger includes a casing shell 1; a suspension pipe 2 is arranged inside the casing shell 1; a stepped pipe 3 is arranged on the inner side of the casing shell 1, and the lower end of the outer side of the suspension pipe 2 is matched with the stepped pipe 3; a plurality of auxiliary devices are evenly distributed along the ring inside the casing shell 1; the auxiliary device at the right end includes an adjusting column 4; the adjusting column 4 penetrates the right side of the casing shell 1 horizontally, and the adjusting column 4 is rotationally connected with the casing shell 1; at the position of the adjusting column 4, a chute 5 is opened inside the casing shell 1; a slide bar 6 is slidably connected inside the chute 5, and a threaded hole 7 is opened on the right side of the slide bar 6; inside the chute 5, the adjusting column 4 is threadedly connected with the slide bar 6; the left end of the slide bar 6 is rotationally connected with a plurality of auxiliary gears 8 through a rotating shaft; a plurality of auxiliary gears 8 are all matched with the suspension pipe 2; a driven gear 9 is fixedly connected to the right end of the adjusting column 4; a counting device matched with the auxiliary gear 8 is arranged on the casing shell 1; all the auxiliary devices are evenly distributed along the ring and have the same structure; an annular gear ring 10 is rotationally connected to the outer side of the casing shell 1, and the annular gear ring 10 is meshed with the driven gear 9; a limiting device is arranged on the annular gear ring 10; the counting device includes a counting gear 11; the counting gear 11 is fixedly connected with the auxiliary gear 8; further includes a plurality of limiting columns 12 matched with the adjusting column 4; the limiting columns 12 all penetrate the driven gear 9 and the adjusting column 4, and the limiting columns 12 are threadedly connected with the driven gear 9 and the adjusting column 4; through holes 13 matched with the limiting columns 12 are opened inside the slide bar 6; the limiting columns 12 are all correspondingly matched with the counting gear 11; a counting module 14 is arranged on the casing shell 1, and the counting module 14 is matched with the counting gear 11; the teeth of the auxiliary gear 8 are inclined in the forward rotation direction; a worm 15 is rotationally connected to the outer side of the casing shell 1; a worm gear ring 16 meshed with the worm 15 is arranged on the annular gear ring 10; a control rod 17 is arranged on the worm 15; the matching parts of the stepped pipe 3 and the suspension pipe 2 are all in the shape of a stepped chamfer; Another technical solution adopted by the present invention is to provide a casing head, including: the casing head hanger described in any one of the above.

[0033] The matching parts of the stepped pipe 3 and the suspension pipe 2 are all in the shape of a stepped chamfer, as Figure 2 and Figure 3 shown; the position structure of the auxiliary gear 8 is as Figure 6 shown;

[0034] During use, the suspension pipe 2 is fixed to the casing, and the suspension pipe 2 and the casing are placed into the casing shell 1. When the suspension pipe 2 enters the casing shell 1, the suspension pipe 2 will pass through the auxiliary gear 8, and the auxiliary gear 8 will rotate. When the auxiliary gear 8 rotates, the counting gear fixedly connected with it will rotate, and the counting module 14 matched with the counting gear will count, so as to count the number of turns of the auxiliary gear 8, which is convenient for auxiliary counting.

[0035] For the rotary adjusting column 4, according to the sliding limit between the slide bar 6 and the chute 5, when the adjusting column 4 rotates, the slide bar 6 threadedly connected thereto moves. The slide bar 6 drives the auxiliary gear 8 rotatably connected thereto to move. The auxiliary gear 8 contacts the suspension pipe 2, and multiple auxiliary gears 8 are attached to and limit the suspension pipe 2 to prevent the suspension pipe 2 from shaking and tilting, facilitating better suspension of the casing pipe;

[0036] Based on the multi-point contact between the suspension pipe 2 and the stepped pipe 3, it is convenient for better force application and more convenient for suspension use. The rotation of the ring gear controls the rotation of multiple driven gears 9, driving multiple adjusting columns 4 to rotate simultaneously, thereby driving multiple auxiliary gears 8 to move simultaneously, facilitating better contact with the circular pipe of the suspension pipe 2 and better control of use. The setting of the worm 15 and the worm gear ring 16 facilitates better limitation of the ring gear 10 to prevent the adjusting column 4 and the ring gear 10 from rotating;

[0037] For the rotary limit post 12, according to the threaded connection between the limit post 12 and the adjusting column 4 and the driven gear 9 respectively, when the limit post 12 rotates, it will move. The movement of the limit post 12 contacts the counting gear 11 through the through hole 13 on the slide bar 6. The limit post 12 drives the counting gear 11 to rotate, and multiple counting gears 11 rotate to clamp the outside of the suspension pipe 2. According to the self-locking principle of the thread, it prevents the counting gear 11 from rotating counterclockwise. Through the auxiliary gear 8, the outside of the suspension pipe 2 is further fixed at multiple points, facilitating better suspension use. Moreover, according to the structure of the auxiliary gear 8, it also prevents the suspension pipe 2 from rotating, facilitating anti-rotation limit use.

[0038] A casing head hanger, a casing head and its usage method, characterized by including the following steps: Step 1: Place the suspension pipe 2 and the casing connection into the casing shell 1;

[0039] Step 2: The suspension pipe 2 passes through the auxiliary gear 8. The auxiliary gear 8 rotates, and the rotary adjusting column 4 is rotated so that the slide bar 6 drives the auxiliary gear 8 to move to limit the suspension pipe 2;

[0040] Step 3: The suspension pipe 2 makes multi-point contact with the stepped pipe 3, and the stepped pipe 3 limits the suspension pipe 2;

[0041] Step 4: Rotate the limit post 12. The limit post 12 moves through the adjusting column 4 and the driven gear 9 connected by threads. Then the limit post 12 contacts the counting gear 11 through the through hole 13 on the slide bar 6. The limit post 12 drives the counting gear 11 to rotate, and further limits the outside of the suspension pipe 2 through the auxiliary gear 8;

[0042] Step 5: The rotation of the limit post 12 no longer limits the rotation of the auxiliary gear 8.

[0043] It should be understood that the above specific embodiments of the present invention are only for illustrative or explanatory purposes of the principles of the present invention, and do not constitute a limitation to the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all variations and modifications that fall within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A casing head hanger, characterized by: The invention comprises a sleeve shell (1); a hanging tube (2) is arranged in the sleeve shell (1); a stepped tube (3) is arranged on the inner side of the sleeve shell (1), and the lower end of the outer side of the hanging tube (2) cooperates with the stepped tube (3), the hanging tube (2) and the stepped tube (3) are in contact at multiple points, and the stepped tube (3) limits the hanging tube (2); a plurality of auxiliary devices are evenly distributed along the ring inside the sleeve shell (1); The auxiliary device at the right end includes an adjusting column (4); the adjusting column (4) penetrates the right side of the sleeve shell (1) in the transverse direction, and the adjusting column (4) is rotatably connected to the sleeve shell (1); a sliding groove (5) is opened in the sleeve shell (1) at the adjusting column (4); a sliding bar (6) is slidably connected in the sliding groove (5), and a threaded hole (7) is opened on the right side of the sliding bar (6); in the sliding groove (5), the adjusting column (4) is threadedly connected to the sliding bar (6); the left end of the sliding bar (6) is rotatably connected to a plurality of auxiliary gears (8) through a rotating shaft; the plurality of auxiliary gears (8) are all matched with the hanging tube (2), and the hanging tube (2) passes through the auxiliary gear (8), and the auxiliary gear (8) rotates, rotating the adjusting column (4), so that the sliding bar (6) drives the auxiliary gear (8) to move and limit the hanging tube (2); the right end of the adjusting column (4) is fixedly connected to a driven gear (9); a circle counting device matched with the auxiliary gear (8) is provided on the sleeve shell (1); All auxiliary devices are evenly distributed along the ring and have the same structure; The outer side of the sleeve shell (1) is rotatably connected to an annular gear ring (10), and the annular gear ring (10) is meshed with the driven gear (9); a limiting device is provided on the annular gear ring (10); The lap counting device includes a lap counting gear (11); the lap counting gear (11) is fixedly connected to the auxiliary gear (8); A counting module (14) is provided on the sleeve shell (1), and the counting module (14) cooperates with the circle counting gear (11).

2. The casing head hanger according to claim 1, characterized in that: It also includes a plurality of limiting columns (12) that cooperate with the adjustment column (4); the limiting columns (12) all penetrate the driven gear (9) and the adjustment column (4), and the limiting columns (12) are threadedly connected to the driven gear (9) and the adjustment column (4); the slide bar (6) is provided with a through hole (13) that cooperates with the limiting columns (12); the limiting columns (12) are all correspondingly matched with the circle counting gear (11).

3. A casing head hanger according to claim 1, characterized in that: The gear teeth of the auxiliary gear (8) are in a forward-rotating inclined shape.

4. A casing head hanger according to claim 1, wherein: A worm (15) is rotatably connected to the outer side of the sleeve shell (1); and a worm wheel ring (16) meshing with the worm (15) is provided on the annular gear ring (10).

5. A casing head hanger according to claim 1, characterized in that: A control rod (17) is provided on the worm (15).

6. A casing head hanger according to claim 1, characterized in that: The fitting parts of the step tube (3) and the hanging tube (2) are both in the shape of step chamfers.

7. A casing head, characterized in that: include: The casing head hanger of any one of claims 1 to 6.

8. A method of using the casing head hanger according to any one of claims 1 to 6, characterized in that, The following steps are involved: Step 1: Connect the hanging tube (2) and the casing and place them into the casing shell (1); Step 2: The hanging tube (2) passes through the auxiliary gear (8), and the auxiliary gear (8) rotates, rotating the adjustment column (4), so that the slide bar (6) drives the auxiliary gear (8) to move and limit the hanging tube (2); Step 3: The hanging tube (2) contacts the step tube (3) at multiple points, and the step tube (3) limits the hanging tube (2); Step 4: Rotate the limit post (12). The limit post (12) moves through the adjusting post (4) and the driven gear (9) connected by threads. The limit post (12) then contacts the revolution counting gear (11) through the through hole (13) on the sliding bar (6). The limit post (12) drives the revolution counting gear (11) to rotate, and further limits the outside of the suspension pipe (2) through the auxiliary gear (8). Step 5: Stop rotating the limit post (12) to limit the rotation of the auxiliary gear (8).

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