A rubber bung barrel swivel casing head

Abstract

The application discloses a rubber plug barrel type rotary sleeve cement head, which comprises an upper cover, a cement head barrel, a quick connector, a first rubber plug mechanism, a second rubber plug mechanism, a second blocking pin, a first blocking pin and a rotary injection mechanism; the upper end of the cement head barrel is connected with the upper cover; the upper part of the cement head barrel is rotationally and sealingly connected with the rotary injection mechanism; the first rubber plug mechanism and the second rubber plug mechanism are sequentially arranged in the cement head barrel from top to bottom; the lower side of the first rubber plug mechanism is provided with the first blocking pin, the first blocking pin is used in cooperation with the first rubber plug mechanism, the lower side of the second rubber plug mechanism is provided with the second blocking pin, and the second blocking pin is used in cooperation with the second rubber plug mechanism; the lower end of the cement head barrel is connected with the quick connector; and the technical advantages of the application are as follows: in the process of casing cementing operation, the whole casing can be driven to rotate and inject cement slurry simultaneously, so that the cementing quality is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of cement head structure technology, specifically to a rubber stopper barrel-type rotating sleeve cement head. Background Technology

[0002] A cement head is a cementing device installed at the top of the casing during cementing operations, connecting the casing to the surface manifold. The cement head enables operations such as circulation, injection of spacer fluid, injection of cement slurry, release of rubber plugs, and slurry replacement, serving as the central hub for cementing operations at the surface manifold wellhead.

[0003] With the development and progress of technology, the industry is constantly improving the structure of cement heads in order to enhance their performance. Summary of the Invention

[0004] The purpose of this invention is to provide a rubber stopper barrel-type rotary sleeve cement head to improve the performance of the cement head.

[0005] To achieve the objectives of this invention, the technical solution provided by this invention is as follows:

[0006] A rubber stopper barrel-type rotary sleeve cement head includes an upper cover, a cement head cylinder, a quick connector, a first rubber stopper mechanism, a second rubber stopper mechanism, a second stopper pin, a first stopper pin, and a rotary injection mechanism.

[0007] The upper end of the cement head cylinder is connected to the upper cover;

[0008] The upper part of the cement head cylinder is rotatably and sealed to the rotary injection mechanism;

[0009] The cement head cylinder is provided with a first rubber stopper mechanism and a second rubber stopper mechanism in sequence from top to bottom. A first stopper pin is provided on the lower side of the first rubber stopper mechanism. The first stopper pin is used in conjunction with the first rubber stopper mechanism. A second stopper pin is provided on the lower side of the second rubber stopper mechanism. The second stopper pin is used in conjunction with the second rubber stopper mechanism.

[0010] The lower end of the cement head cylinder is connected to a quick connector;

[0011] The first and second rubber stopper mechanisms have the same structure, both including a rubber stopper barrel and a rubber stopper. The rubber stopper barrel is open at the top and bottom, and there is a gap between the outer wall of the rubber stopper barrel and the inner wall of the cement head cylinder.

[0012] Compared with the prior art, the technical advantages of the present invention are as follows:

[0013] First, during the casing cementing operation, the entire casing can be rotated while cement slurry is injected, which greatly improves the quality of cementing.

[0014] Secondly, the ball launcher can activate the construction device pre-installed at the bottom of the well before releasing the rubber plug. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0016] In the figure, 1 is the top cover, 2 is the deep groove ball bearing, 3 is the rotating sleeve, 4 is the mounting hole, 5 is the manifold, 6 is the medium injection hole, 7 is the first rubber stopper mechanism, 8 is the cement head cylinder, 9 is the first enlarged part, 10 is the second rubber stopper mechanism, 11 is the ball thrower, 12 is the second enlarged part, 13 is the quick connector, 14 is the rubber stopper indicator, 15 is the second stop pin, 16 is the first stop pin, and 21 is the plug valve.

[0017] Figure 2 for Figure 1 A schematic diagram of the structure of the first enlarged section;

[0018] In the diagram, the first inclined plane is 17;

[0019] Figure 3 for Figure 1 A schematic diagram of the structure of the second enlarged section;

[0020] In the diagram, the second inclined plane is 18;

[0021] Figure 4 for Figure 1 Diagram of the AA direction;

[0022] Figure 5 This is a first schematic diagram of the structure of the rubber stopper bucket in an embodiment of this application;

[0023] In the diagram, the side support block is 19, and the third inclined surface is 20.

[0024] Figure 6 This is a second schematic diagram of the structure of the rubber stopper bucket in the embodiments of this application;

[0025] Figure 7 This is a schematic diagram of the quick connector in an embodiment of this application;

[0026] Figure 8 This is a schematic diagram of the structure of the first stop pin in the embodiments of this application;

[0027] In the diagram, the handwheel is 1501, the guide tube is 1502, the transmission rod is 1503, and the stop pin is 1504. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1-8 The diagram shows the structure of an embodiment of this application.

[0030] This embodiment provides a rubber stopper barrel-type rotary sleeve cement head, including an upper cover 1, a cement head cylinder 8, a quick connector 13, a first rubber stopper mechanism 7, a second rubber stopper mechanism 10, a second stopper pin 15, a first stopper pin 16, and a rotary injection mechanism.

[0031] The upper end of the cement head cylinder 8 is connected to the upper cover 1;

[0032] The upper part of the cement head cylinder 8 is rotatably and sealed to the rotary injection mechanism.

[0033] The cement head cylinder 8 is provided with a first rubber stopper mechanism 7 and a second rubber stopper mechanism 10 arranged from top to bottom inside. A first stopper pin 16 is provided on the lower side of the first rubber stopper mechanism 7, and the first stopper pin 16 is used in conjunction with the first rubber stopper mechanism 7. A second stopper pin 15 is provided on the lower side of the second rubber stopper mechanism 10, and the second stopper pin 15 is used in conjunction with the second rubber stopper mechanism 10.

[0034] The lower end of the cement head cylinder 8 is connected to the quick connector 13;

[0035] The first rubber stopper mechanism 7 and the second rubber stopper mechanism 10 have the same structure, both including a rubber stopper barrel and a rubber stopper. The rubber stopper barrel is open at the top and bottom, and there is a gap between the outer wall of the rubber stopper barrel and the inner wall of the cement head cylinder 8.

[0036] During use, while the cement head cylinder 8 rotates, the medium enters the cement head cylinder 8 through the medium injection hole 6 of the cement head cylinder 8 via the manifold 5. The medium is discharged into the well through the gap between the rubber stopper barrel and the inner wall of the cement head cylinder 8 via the quick connector 13. When a rubber stopper needs to be injected into the well, the stop pin at the lower end of the second rubber stopper mechanism is retracted, and the second rubber stopper mechanism 10 falls onto the quick connector 13. The rubber stopper barrel is sealed to the upper end of the quick connector 13. The medium is continued to be injected, causing the rubber stopper of the second rubber stopper mechanism to detach from the lower end of the rubber stopper barrel and enter the well after passing through the quick connector 13. If the rubber stopper of the first rubber stopper mechanism also needs to be injected into the well, the stop pin at the lower end of the first rubber stopper mechanism 7 is retracted, and the first rubber stopper mechanism 7 falls onto the rubber stopper barrel of the second rubber stopper mechanism. The lower end of the rubber stopper barrel of the first rubber stopper mechanism 7 is sealed to the upper end of the rubber stopper barrel of the second rubber stopper mechanism. The medium is continued to be injected, causing the rubber stopper of the first rubber stopper mechanism 7 to detach from the lower end of the rubber stopper barrel and enter the well after passing through the quick connector 13.

[0037] The medium mentioned includes cement slurry or other liquids.

[0038] Preferably, this embodiment provides a specific structure for a rubber stopper barrel and a quick connector 13. An annular first inclined surface 17 is provided on the outer side of the lower end face of the rubber stopper barrel, and an annular second inclined surface 18 is provided on the inner side of the upper end of the quick connector 13. The second inclined surface 18 cooperates with the first inclined surface 17 to achieve a sealed connection between the lower end face of the rubber stopper barrel and the upper end of the quick connector 13.

[0039] In addition, an annular third inclined surface 20 is provided on the inner side of the upper end face of the rubber stopper barrel, so that the lower end of the adjacent rubber stopper barrel is sealed to the upper end of the rubber stopper barrel. The third inclined surface (20) of the rubber stopper barrel of the second rubber stopper mechanism (10) is used in conjunction with the first inclined surface (17) of the rubber stopper barrel of the first rubber stopper mechanism (7).

[0040] Preferably, a longitudinal side support block 19 is provided on the outer circumferential wall of the rubber stopper barrel, and the side support block 19 is connected to the inner wall of the cement head cylinder 8, so that there is a gap between the outer wall of the rubber stopper barrel and the inner wall of the cement head cylinder 8 that allows the medium to pass through. The side support block 19 can be provided in three parts, and the three side support blocks 19 are evenly spaced on the outer circumferential wall.

[0041] In addition, a ball launcher 11 is provided on the cement head cylinder 8. The ball launcher 11 can activate the construction device reserved at the bottom of the well in advance before releasing the rubber plug.

[0042] In addition, the quick connector 13 is provided with a rubber stopper indicator 14, which allows the external observation of whether the rubber stopper has fallen off.

[0043] Preferably, this embodiment provides a specific structure for the second stop pin 15 and the first stop pin 16, both of which have the same structure and both include a stop pin rod 1504 that can extend and retract.

[0044] The first stop pin includes a handwheel 1501, a guide tube 1502, a transmission rod 1503, and a stop pin rod 1504. The stop pin rod 1504 is slidably connected inside the guide tube 1502. The stop pin rod 1504 can extend or retract from the right end of the guide tube 1502. The transmission rod 1503 is threadedly connected to the stop pin rod 1504. The handwheel 1501 is fixedly connected to the left end of the transmission rod 1503. The handwheel 1501 drives the transmission rod 1503 to rotate, thereby causing the stop pin rod 1504 to extend or retract. The cement head cylinder 8 is provided with a stop pin hole, and the right end of the guide tube 1502 is installed at the stop pin hole.

[0045] In addition, the upper end of the cement head cylinder 8 is connected to the upper cover 1, and a sealing ring is provided at the connection.

[0046] In addition, the lower end of the cement head cylinder 8 is connected to the quick connector 13, and a sealing ring is provided at the connection.

[0047] Preferably, the rotary injection mechanism is connected to a manifold 5 equipped with a stopcock valve 21. The rotary injection mechanism includes a rotating sleeve 3, which is rotatably and sealed to the cement head cylinder 8 via a deep groove ball bearing 2. A buffer chamber is provided between the rotating sleeve 3 and the cement head cylinder 8. The rotating sleeve 3 is provided with a mounting hole 4, which is connected to the manifold 5. Only one medium injection hole 6 is provided on the side of the cement head cylinder 8, corresponding to the position of the buffer chamber. All media required for construction are injected through this single medium injection hole 6 or the top drive device. When using the medium injection hole 6, the medium enters the buffer chamber through the manifold 5, and then enters the cement head cylinder 8 through the medium injection hole. This structure enables the rotary injection function.

[0048] When the cement head is connected to the top drive unit for cementing operations, the top drive unit is threadedly connected to the cement head cover 1, which drives the cement head cylinder 8, quick connector 13, and cementing casing threadedly connected to the quick connector 13 to rotate together. Meanwhile, the rotary injection mechanism, along with the plug valve 21 and manifold 5, remains stationary.

[0049] In this invention, only one medium injection hole 6 is needed on the side of the cement head cylinder 8, eliminating the need for the multi-valve manifold of existing cement heads. This innovative design can improve the safety of rotary cementing operations, reduce the accident rate, and greatly reduce the cementing platform space required for the cement head during rotary operations.

[0050] Preferably, the upper cover 1 has an annular groove and a lower platform in the middle, and the medium injection hole 6 is located within the annular groove and above the lower platform; the lower platform covers the upper end of the first rubber stopper mechanism 7. This ensures that when the first stop pin 16 extends, the injected liquid will not directly impact the rubber stopper.

[0051] During construction, the injection pressure of cement slurry or other liquids is very high. The annular groove of the top cover, the lower platform, and the rubber stopper barrel together effectively protect the rubber stopper and prevent it from being damaged. It also prevents pressure from being applied directly to the rubber stopper barrel from top to bottom, which could bend the retaining pin.

[0052] Finally, it should be noted that the above embodiments are merely illustrative and explanatory of the present invention, and are not intended to limit the present invention to the scope of the described embodiments. Furthermore, those skilled in the art will understand that the present invention is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of the present invention, all of which fall within the scope of protection claimed by the present invention.

Claims

1. A rubber-stopper-type rotary sleeve cement head, characterized in that, Includes a top cover (1), a cement head cylinder (8), a quick connector (13), a first rubber stopper mechanism (7), a second rubber stopper mechanism (10), a second stopper (15), a first stopper (16), and a rotary injection mechanism; The upper end of the cement head cylinder (8) is connected to the upper cover (1); The upper part of the cement head cylinder (8) is rotatably and sealed to the rotary injection mechanism; The cement head cylinder (8) is provided with a first rubber stopper mechanism (7) and a second rubber stopper mechanism (10) arranged from top to bottom. A first stopper pin (16) is provided on the lower side of the first rubber stopper mechanism (7), and the first stopper pin (16) is used in conjunction with the first rubber stopper mechanism (7). A second stopper pin (15) is provided on the lower side of the second rubber stopper mechanism (10), and the second stopper pin (15) is used in conjunction with the second rubber stopper mechanism (10). The lower end of the cement head cylinder (8) is connected to the quick connector (13); The first rubber stopper mechanism (7) and the second rubber stopper mechanism (10) have the same structure, both including a rubber stopper barrel and a rubber stopper. The rubber stopper barrel is open at the top and bottom, and there is a gap between the outer wall of the rubber stopper barrel and the inner wall of the cement head cylinder (8). While the cement head cylinder (8) rotates, the medium enters the cement head cylinder (8) through the medium injection hole (6) of the cement head cylinder (8) via the manifold (5). The medium passes through the gap between the rubber stopper barrel and the inner wall of the cement head cylinder (8) and is discharged into the well through the quick connector (13). When it is necessary to inject the rubber stopper into the well, the stop pin at the lower end of the second rubber stopper mechanism is retracted, and the second rubber stopper mechanism (10) falls onto the quick connector (13). The rubber stopper barrel is sealed to the upper end of the quick connector (13), and the medium continues to be injected, causing the second rubber stopper mechanism to... The rubber stopper detaches from the bottom of the stopper barrel and enters the well after passing through the quick connector (13). If the rubber stopper of the first stopper mechanism needs to be injected into the well, the stop pin at the bottom of the first stopper mechanism (7) is retracted, and the first stopper mechanism (7) falls onto the stopper barrel of the second stopper mechanism. The bottom of the stopper barrel of the first stopper mechanism (7) is sealed to the top of the stopper barrel of the second stopper mechanism. The medium is then injected so that the rubber stopper of the first stopper mechanism (7) detaches from the bottom of the stopper barrel and enters the well after passing through the quick connector (13).

2. The rubber stopper-type rotary sleeve cement head according to claim 1, characterized in that, The lower end of the rubber stopper barrel is provided with an annular first inclined surface (17) on the outer side, and the upper end of the quick connector (13) is provided with an annular second inclined surface (18). The second inclined surface (18) is used in conjunction with the first inclined surface (17).

3. The rubber stopper-type rotary sleeve cement head according to claim 2, characterized in that, The upper end face of the stopper barrel is provided with an annular third inclined surface (20); the third inclined surface (20) of the stopper barrel of the second stopper mechanism (10) is used in conjunction with the first inclined surface (17) of the stopper barrel of the first stopper mechanism (7).

4. The rubber stopper-type rotary sleeve cement head according to claim 1, characterized in that, The rubber stopper barrel has a longitudinal side support block (19) on its outer circumferential wall.

5. The rubber stopper-type rotary sleeve cement head according to claim 4, characterized in that, There are 3 side support blocks (19), and the 3 side support blocks (19) are evenly spaced on the outer circumferential wall.

6. The rubber stopper-type rotary sleeve cement head according to claim 1, characterized in that, A ball-throwing device (11) is installed on the cement head cylinder (8).

7. The rubber stopper barrel-type rotary sleeve cement head according to claim 1, characterized in that, The quick connector (13) is provided with a rubber plug indicator (14).

8. The rubber stopper-type rotary sleeve cement head according to claim 1, characterized in that, Both the second stop pin (15) and the first stop pin (16) include a stop pin bar (1504) that can extend and retract.

9. The rubber stopper-type rotary sleeve cement head according to claim 1, characterized in that, The upper end of the cement head cylinder (8) is connected to the upper cover (1), and a sealing ring is provided at the connection.

10. The rubber stopper-type rotary sleeve cement head according to claim 1, characterized in that, The lower end of the cement head cylinder (8) is connected to the quick connector (13), and a sealing ring is provided at the connection.

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