A mechanically strong rotatable tailpipe hanger

Abstract

The application provides a rotatable tail pipe hanger with high mechanical strength and relates to the technical field of well cementing. The tail pipe hanger comprises a mounting seat, a groove is formed in the top end of the mounting seat, and guide teeth are fixedly connected in an annular array on the top end surface of the mounting seat. The guide teeth and the mounting seat jointly form a transmission structure. The tail pipe hanger can be quickly adjusted in the direction according to different mounting clamping positions when the tail pipe needs to be connected in a narrow space such as a downhole, thereby improving the installation efficiency of the tail pipe and the subsequent well cementing operation. When the main pipe is connected with a cover and other components, the drive can drive the rotation of the bevel gear, the bevel gear is meshed with the guide teeth fixedly connected to the top end surface of the mounting seat, the main pipe can be quickly adjusted in the direction according to the different required assembly positions, and the assembly efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil and gas well cementing, in particular to a rotatable liner hanger with high mechanical strength. BACKGROUND

[0002] The liner cementing process is the most commonly used method in deep well cementing, which can save casing, has significant economic benefits, can simplify the well structure, improve the axial load conditions of the pipe string and improve the drilling water conditions, and can significantly reduce the annular flow resistance during construction.

[0003] However, the current liner hanger still has the following disadvantages: when the liner hanger is used, the liner and the hanger generally need to be connected manually using special equipment, so that when the liner needs to be connected in a relatively narrow space such as downhole, the liner hanger cannot be quickly adjusted in direction according to different installation clamping positions, which will result in low installation efficiency of the liner and affect subsequent oil and gas well cementing operations. SUMMARY

[0004] Therefore, the present application provides a rotatable liner hanger with high mechanical strength, which, compared with the traditional liner hanger, is provided with a drive inside the seat body and a bevel gear on the output shaft of the drive, so that when the main pipe is connected with the cover body and other components, the main pipe can be quickly adjusted in rotation according to the different required assembly positions by using the drive to drive the rotation of the bevel gear, and then the bevel gear is meshed and transmitted with the guide teeth fixed on the top end surface of the mounting seat, so as to achieve the purpose of improving the assembly efficiency.

[0005] The present application provides a rotatable liner hanger with high mechanical strength, which specifically comprises a main pipe; the main body of the main pipe is a bidirectional through structure, and a connecting plate is fixedly connected to the inner wall of the main pipe, the connecting plate is arranged in an upper and lower array, and the connecting plate is also fixedly connected to the inner wall of the main pipe in an annular array, an inner pipe is fixedly connected to the inner side of the connecting plate, the main body of the inner pipe is a tubular structure, and the diameter of the inner pipe is smaller than the diameter of the main pipe, a mounting seat is fixedly connected to the top end surface of the main pipe, the diameter of the mounting seat is greater than the diameter of the main pipe, a groove is formed in the top end of the mounting seat, guide teeth are fixedly connected to the top end surface of the mounting seat in an annular array, and the guide teeth and the mounting seat jointly form a transmission structure.

[0006] Furthermore, the helical gear meshes with the guide gear fixedly connected to the top surface of the mounting base, and the drive motor and the helical gear together form a rotation drive structure for the mounting base. A cover is fixedly connected to the inner wall of the base. The main body of the cover is a frustoconical structure that is thinner at the top and thicker at the bottom. An injection pipe is fixedly connected to the inner wall of the cover. The diameter of the injection pipe is smaller than the diameter of the cover. The top opening of the injection pipe matches the top opening of the conduit fixedly connected to the top surface of the inner tube. An insert block is fixedly connected to the bottom surface of the injection pipe.

[0007] Furthermore, a mounting plate is fixedly connected to the top surface of the conduit. The main body of the mounting plate is a ring structure, and a slot is provided on the top surface of the mounting plate. The slot is an arc-shaped structure, and there are two slots in total. The two slots are opened in opposite directions inside the mounting plate, and a seat body is installed on the top of the mounting base.

[0008] Furthermore, a clamping member is fixedly connected to the inner wall of the injection tube. There are four clamping members, which are fixedly connected to the inner wall of the injection tube in a ring array. Each of the four clamping members has a clamping plate installed at its output end. The main body of the clamping plate is made of rubber and matches the mounting groove opened on the outer circumference of the conduit. A magnetic ring is fixedly connected to the inner wall of the injection tube. The main body of the magnetic ring is an electromagnet and matches the mounting plate fixedly connected to the top surface of the conduit. An annular groove is opened at the top of the inner part of the base. This annular groove is a guide groove and matches the diameter and position of the guide ring fixedly connected to the top surface of the mounting base.

[0009] Furthermore, the length of the inner tube is greater than the length of the main tube, and the bottom end of the inner tube protrudes from the main tube. A bearing seat is interference-fitted onto the protruding part, and a mounting plate is interference-fitted onto the outer side of the bearing seat. The main body of the mounting plate is a ring structure, and the inner wall diameter of the mounting plate is slightly smaller than the outer diameter of the bearing seat. A through hole is opened inside the mounting plate, which is a mounting hole. There are a total of six mounting holes, and the six mounting holes are arranged in a ring array inside the mounting plate.

[0010] Furthermore, the main body of the insert is an arc-shaped structure, and there are two inserts. The two inserts are fixedly connected to the bottom end face of the injection tube. The inserts match the slots opened in the mounting plate. When the injection tube is connected to the mounting plate, the two inserts fixedly connected to the bottom end face of the injection tube are synchronously inserted into the slots and connected to the mounting plate.

[0011] Furthermore, the structure of the base is consistent with that of the mounting base, and the base and the mounting base are arranged opposite each other. A notch is opened on the outer circumference of the base for installing the helical gear, and a groove is opened at the bottom of the base. A drive motor is installed on the inner wall of the groove. There are two drive motors, and the two drive motors are arranged opposite each other and are assembled on the inner wall of the base with bolts. A transmission shaft is provided on the side of the drive motor closest to the helical gear, and is connected to the helical gear through the transmission shaft.

[0012] Furthermore, a guide ring is fixedly connected to the top surface of the mounting base. The main body of the guide ring is a ring structure, and the diameter of the guide ring is larger than the diameter of the inner tube but smaller than the diameter of the mounting base. A conduit is fixedly connected to the top surface of the inner tube and communicates with it. A groove is opened on the outer circumferential surface of the straight tube in the conduit. This groove is a mounting groove. There are four mounting grooves in total, and the four mounting grooves are arranged in a ring array on the outer circumferential surface of the conduit. The mounting grooves and the conduit together form a limiting structure. Beneficial effects

[0013] 1. Compared with traditional tailpipe hangers, this invention has a driver installed inside the base and a helical gear installed on the output shaft of the driver. When the main pipe is connected to components such as the cover, the helical gear is driven by the rotation of the driver, and the helical gear meshes with the guide gear fixedly connected to the top surface of the mounting base. This allows the main pipe to be quickly rotated and adjusted according to the different assembly positions required, thereby improving assembly efficiency.

[0014] 2. By providing a mounting plate and its internal slots, when the main pipe is connected to the injection tube, the magnetic field generated by the magnetic ring on the inner wall of the injection tube can be used to attract and limit the main pipe. As the mounting base rotates, the slots in the mounting plate match the two inserts fixedly connected to the bottom end of the injection tube. Under the attraction of the magnetic ring, the mounting plate can quickly move upward a certain distance and engage with the two inserts fixedly connected to the bottom end of the injection tube, allowing the device to connect more quickly.

[0015] 3. By providing a bearing seat and mounting plate, when the tailpipe is being assembled, if it is necessary to connect the tailpipe to the drill bit or other instruments, quick assembly and connection can be achieved through the mounting holes pre-drilled in the mounting plate. This enhances the overall mechanical strength of the device and extends its service life. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0017] In the attached diagram:

[0018] Figure 1 A schematic axial view of the suspension in a split state according to an embodiment of the present invention is shown;

[0019] Figure 2 A schematic diagram of the assembly of the hanger according to an embodiment of the present invention is shown;

[0020] Figure 3 A schematic front view of the suspension in a cross-section state according to an embodiment of the present invention is shown;

[0021] Figure 4 A schematic diagram of the magnetic ring assembly of the suspension according to an embodiment of the present invention is shown;

[0022] Figure 5 A schematic diagram of the mounting base and guide teeth assembly of the suspension according to an embodiment of the present invention is shown;

[0023] Figure 6 A schematic diagram of the drive motor and helical gear assembly of the suspension according to an embodiment of the present invention is shown;

[0024] Figure 7 A top view schematic diagram of a hanger according to an embodiment of the present invention is shown.

[0025] Figure 8 A schematic diagram of the mounting plate and slot assembly of the hanger according to an embodiment of the present invention is shown.

[0026] List of reference numerals

[0027] 1. Main tube; 101. Connecting plate; 102. Inner tube; 103. Mounting base; 104. Guide gear; 2. Bearing housing; 201. Mounting plate; 202. Mounting hole; 3. Guide tube; 301. Mounting groove; 302. Mounting disc; 303. Slot; 304. Guide ring; 4. Base body; 401. Drive motor; 402. Helical gear; 403. Cover; 404. Injection pipe; 405. Insert block; 406. Clamping component; 407. Clamping plate; 408. Magnetic ring; 409. Guide groove. Detailed Implementation

[0028] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0029] Example: Please refer to Figures 1 to 8 :

[0030] This invention proposes a high-strength rotatable tailpipe hanger, comprising a main pipe 1; the main body of the main pipe 1 has a bidirectional through-structure on both the upper and lower sides, and a connecting plate 101 is fixedly connected to the inner wall of the main pipe 1. The connecting plates 101 are arranged in an upper and lower array, and are also fixedly connected to the inner wall of the main pipe 1 in a ring array. An inner tube 102 is fixedly connected to the inner side of the connecting plate 101. The main body of the inner tube 102 is a tubular structure, and the diameter of the inner tube 102 is smaller than the diameter of the main pipe 1. A mounting seat 103 is fixedly connected to the top surface of the main pipe 1. The diameter of the mounting seat 103 is larger than the diameter of the main pipe 1, and a groove is provided at the top of the mounting seat 103. Guide teeth 104 are fixedly connected to the top surface of the mounting seat 103 in a ring array. The guide teeth 104 and the mounting seat 103 together form a transmission structure.

[0031] The inner tube 102 is longer than the main tube 1, and its bottom end protrudes from the main tube 1. A bearing seat 2 is interference-fitted onto this protruding portion. A mounting plate 201 is also interference-fitted onto the outer side of the bearing seat 2. The main body of the mounting plate 201 is annular, and the inner diameter of the mounting plate 201 is slightly smaller than the outer diameter of the bearing seat 2. A through hole, known as a mounting hole 202, is provided inside the mounting plate 201. There are six mounting holes 202 arranged in a circular array inside the mounting plate 201. A clamping member 406 is fixedly connected to the inner wall of the injection tube 404. There are four clamping members 406 arranged in a circular array. The annular array is fixedly connected to the inner wall of the injection tube 404, and clamping plates 407 are installed on the output ends of the four clamping members 406. The main body of the clamping plate 407 is made of rubber, and the clamping plate 407 matches the mounting groove 301 opened on the outer peripheral surface of the conduit 3. A magnetic ring 408 is fixedly connected to the inner wall of the injection tube 404. The main body of the magnetic ring 408 is an electromagnet, and the magnetic ring 408 matches the mounting plate 302 fixedly connected to the top surface of the conduit 3. An annular groove is opened at the top of the inner part of the base 4. The annular groove is a guide groove 409. The guide groove 409 matches the diameter and position of the guide ring 304 fixedly connected to the top surface of the mounting base 103.

[0032] Among them, a guide ring 304 is fixedly connected to the top surface of the mounting base 103. The main body of the guide ring 304 is a ring structure, and the diameter of the guide ring 304 is larger than the diameter of the inner tube 102 and smaller than the diameter of the mounting base 103. A conduit 3 is fixedly connected to the top surface of the inner tube 102 and communicates with it. A groove is opened on the outer circumferential surface of the straight tube in the conduit 3. This groove is a mounting groove 301. There are four mounting grooves 301 in total, and the four mounting grooves 301 are arranged in a ring array on the outer circumferential surface of the conduit 3. The mounting grooves 301 and the conduit 3 together form a limiting structure. A mounting plate 302 is fixedly connected to the top surface of the conduit 3. The main body of the mounting plate 302 is a ring structure, and a slot 303 is opened on the top surface of the mounting plate 302. The slot 303 is an arc structure, and there are two slots 303 in total. The two slots 303 are opened opposite each other in the inner position of the mounting plate 302. A seat body 4 is installed on the top of the mounting base 103.

[0033] The structure of the base 4 is identical to that of the mounting base 103, and the base 4 and the mounting base 103 are arranged opposite each other. A notch is provided on the outer circumference of the base 4 for mounting the helical gear 402. A groove is provided at the bottom end of the base 4, and a drive motor 401 is mounted on the inner wall of this groove. There are two drive motors 401, which are bolted to the inner wall of the base 4 and are arranged opposite each other. A drive shaft is provided on the side of the drive motor 401 closest to the helical gear 402, and is connected to the helical gear 402 through the drive shaft. The helical gear 402 meshes with the guide gear 104 fixedly connected to the top surface of the mounting base 103. The drive motor 401 and the helical gear 402 together form the rotation drive structure for the mounting base 103. A cover 403 is fixedly connected to the inner wall of the base 4. The main body of 403 is a frustoconical structure that is thinner at the top and thicker at the bottom. An injection tube 404 is fixedly connected to the inner wall of the cover 403. The diameter of the injection tube 404 is smaller than the diameter of the cover 403. The injection tube 404 matches the top opening of the conduit 3 fixedly connected to the top surface of the inner tube 102. An insert 405 is fixedly connected to the bottom surface of the injection tube 404. The main body of the insert 405 is an arc-shaped structure. There are two inserts 405. The two inserts 405 are fixedly connected to the bottom surface of the injection tube 404. The inserts 405 match the slots 303 opened in the mounting plate 302. When the injection tube 404 is connected to the mounting plate 302, the two inserts 405 fixedly connected to the bottom surface of the injection tube 404 are simultaneously inserted into the slots 303 and connected to the mounting plate 302.

[0034] The specific usage and function of this embodiment: In this invention, when cementing an oil and gas well, the components such as drill bits that need to be connected can be connected to the mounting plate 201 located on the outside of the bearing seat 2. The holes of the connected workpieces are aligned with the holes of the mounting holes 202 in the mounting plate 201. Simultaneously, bolts are passed through the mounting holes 202 in the mounting plate 201 to connect and assemble with the drill bits and other workpieces. After assembly, the main pipe 1 can be supported and limited by the bearing seat 2 or other workpieces located at its bottom end, according to actual needs. Then, the side of the cover 403 with the seat 4 fixedly connected is placed downwards.

[0035] Furthermore, when the cover 403 moves downwards, the guide ring 304 fixedly connected to the top surface of the mounting base 103 can be inserted into the guide groove 409 at the bottom of the base 4 for assembly. Simultaneously, the helical gears 402 located on the outside of the two drive motors 401 engage with the guide teeth 104 fixedly connected to the top surface of the mounting base 103. After assembly, the drive motors 401 mounted on the inner wall of the base 4 can be started synchronously to drive the helical gears 402 to rotate. The engagement of the helical gears 402 with the guide teeth 104 fixedly connected to the top surface of the mounting base 103 drives the main pipe 1 to rotate and adjust. After adjustment... After completion, the magnetic ring 408 set on the inner wall of the injection tube 404 can be energized. The magnetic ring 408 generates magnetism after being energized, and attracts and limits the mounting plate 302 fixedly connected to the top surface of the conduit 3. Simultaneously, the mounting base 103 can rotate inside the plane until the position of the slot 303 opened in the mounting plate 302 matches the position of the two inserts 405 fixedly connected to the bottom surface of the injection tube 404. After the slot 303 matches the position of the inserts 405, the two inserts 405 fixedly connected to the bottom surface of the injection tube 404 can be simultaneously inserted into the interior of the mounting plate 302 for automatic locking and limiting.

[0036] Furthermore, once the clamping limit is completed, the four clamping parts 406 installed on the inner wall of the cover 403 can be activated simultaneously to push the four clamping plates 407 inward. When the four clamping plates 407 move inward under the pushing action of the four clamping parts 406, they can be simultaneously inserted into the internal position of the mounting groove 301 opened on the outer peripheral surface of the conduit 3 until the current conduit 3 is clamped and limited. After the clamping limit is completed, the quick connection operation of the current main pipe 1 and the tail pipe and the accessories connected to the tail pipe can be completed simultaneously, thereby achieving a more practical purpose.

Claims

1. A rotatable tailpipe hanger with high mechanical strength, characterized in that, Includes a main pipe (1); the main body of the main pipe (1) is a bidirectional through structure on both the upper and lower sides, and a connecting plate (101) is fixedly connected to the inner wall of the main pipe (1). The connecting plates (101) are arranged in an upper and lower array, and the connecting plates (101) are also fixedly connected to the inner wall of the main pipe (1) in a ring array. An inner tube (102) is fixedly connected to the inner side of the connecting plate (101). The main body of the inner tube (102) is a tubular structure, and the diameter of the inner tube (102) is smaller than the diameter of the main pipe (1). The top surface of the main pipe (1) is fixedly connected to... A mounting base (103) is provided, the diameter of which is larger than that of the main pipe (1). A groove is provided at the top of the mounting base (103). Guide teeth (104) are fixedly connected in a ring array on the top surface of the mounting base (103). The guide teeth (104) and the mounting base (103) together form a transmission structure. The length of the inner tube (102) is greater than that of the main pipe (1). The bottom end of the inner tube (102) protrudes from the main pipe (1). A bearing seat (2) is interference-fitted onto the protruding part. The outer side of the bearing seat (2) An interference fit is also provided with a mounting plate (201). The main body of the mounting plate (201) is a ring structure, and the inner diameter of the mounting plate (201) is slightly smaller than the outer diameter of the bearing seat (2). A through hole is provided inside the mounting plate (201), which is a mounting hole (202). There are six mounting holes (202) in total, and the six mounting holes (202) are arranged in a ring array inside the mounting plate (201). A guide ring (304) is fixedly connected to the top surface of the mounting seat (103). The main body of the guide ring (304) is a ring structure. The diameter of the guide ring (304) is larger than that of the inner tube (102) and smaller than that of the mounting base (103). The top surface of the inner tube (102) is fixedly connected to the conduit (3) and communicates with the conduit (3). The outer circumferential surface of the straight tube in the conduit (3) is provided with a groove, which is the mounting groove (301). There are four mounting grooves (301), and the four mounting grooves (301) are arranged in a ring array on the outer circumferential surface of the conduit (3). The mounting grooves (301) and the conduit (3) together form a limiting structure.

2. The high mechanical strength rotatable tailpipe hanger as described in claim 1, characterized in that: The top surface of the conduit (3) is fixedly connected to the mounting plate (302). The main body of the mounting plate (302) is a ring structure, and a slot (303) is provided on the top surface of the mounting plate (302). The slot (303) is an arc structure, and there are two slots (303). The two slots (303) are opened in opposite directions inside the mounting plate (302), and a seat body (4) is installed on the top of the mounting base (103).

3. The high mechanical strength rotatable tailpipe hanger as described in claim 2, characterized in that: The structure of the seat (4) is the same as that of the mounting base (103), and the seat (4) and the mounting base (103) are arranged opposite each other. A notch is provided on the outer circumferential surface of the seat (4) for installing the helical gear (402). A groove is provided at the bottom end of the seat (4). A drive motor (401) is installed on the inner wall of the groove. There are two drive motors (401), and the two drive motors (401) are arranged opposite each other and are bolted to the inner wall of the seat (4). A transmission shaft is provided on the side of the drive motor (401) near the helical gear (402), and it is connected to the helical gear (402) through the transmission shaft.

4. The high mechanical strength rotatable tailpipe hanger as described in claim 3, characterized in that: The helical gear (402) meshes with the guide gear (104) fixedly connected to the top surface of the mounting base (103) for transmission, and the drive motor (401) and the helical gear (402) together form a rotation drive structure for the mounting base (103). A cover (403) is fixedly connected to the inner wall of the base (4). The main body of the cover (403) is a frustoconical structure that is thinner at the top and thicker at the bottom. An injection pipe (404) is fixedly connected to the inner wall of the cover (403). The diameter of the injection pipe (404) is smaller than the diameter of the cover (403). The top opening of the injection pipe (404) matches the top opening of the conduit (3) fixedly connected to the top surface of the inner tube (102). An insert (405) is fixedly connected to the bottom surface of the injection pipe (404).

5. The high mechanical strength rotatable tailpipe hanger as described in claim 4, characterized in that: The main body of the insert (405) is an arc-shaped structure, and there are two inserts (405). The two inserts (405) are fixedly connected to the bottom end face of the injection tube (404). The inserts (405) match the slots (303) opened in the mounting plate (302). The injection tube (404) is connected to the mounting plate (302). The two inserts (405) fixedly connected to the bottom end face of the injection tube (404) are synchronously inserted into the slots (303) and connected to the mounting plate (302).

6. The high mechanical strength rotatable tailpipe hanger as described in claim 5, characterized in that: A clamping member (406) is fixedly connected to the inner wall of the injection tube (404). There are four clamping members (406) in total, and the four clamping members (406) are fixedly connected to the inner wall of the injection tube (404) in a ring array. A clamping plate (407) is installed on the output end of each of the four clamping members (406). The main body of the clamping plate (407) is made of rubber, and the clamping plate (407) matches the mounting groove (301) opened on the outer peripheral surface of the conduit (3). A magnetic ring (408) is fixedly connected to the inner wall of the injection tube (404). The main body of the magnetic ring (408) is an electromagnet. The magnetic ring (408) matches the mounting plate (302) fixedly connected to the top surface of the conduit (3). An annular groove is opened at the top of the inner part of the seat (4). The annular groove is a guide groove (409). The guide groove (409) matches the diameter and position of the guide ring (304) fixedly connected to the top surface of the mounting base (103).

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