A wave compensation casing for drilling operations in shallow water exploration

Abstract

The utility model relates to the technical field of offshore survey equipment, and specifically to a wave compensation sleeve for drilling operations in shallow sea exploration, comprising an outer tube, a compensation tube and an inner tube, the outer tube comprising a flange, a fixed ferrule, a telescopic rod and a connector, two outer tubes are installed on both sides of the compensation tube, the inner tube passes through the outer tube and the compensation tube and is connected to the outer tube, the flange is installed at one end of the outer tube and is at the connection between the outer tube and the compensation tube, the fixed ferrule is installed at the center of the outer tube and is embedded with the inner tube, one end of the telescopic rod is connected to the fixed ferrule, and the other end is connected to the inner wall of the outer tube, the fixed ferrule comprises a boss and a first positioning frame, and the boss is installed on the outside of the fixed ferrule. The utility model provides lateral compensation for the inner tube, so that it can cope with the lateral impact of wind and waves, the inner tube is nested with the protective layer, the inner tube can be directly taken out for maintenance, the degree of longitudinal compensation is adjusted using a protective structure, and the service life of the parts is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore exploration equipment, in particular to a wave compensation casing for drilling operations in shallow sea exploration. Background Art

[0002] A wave compensation tube is a device that uses active or passive technology to compensate for the irregular movement of working equipment on a mother ship or offshore platform caused by wave motion. It is widely used in shallow water exploration. Due to the unpredictable weather conditions at sea and the need to drill deep into the seabed, the compensation tube used for drilling must not only withstand the impact of wind and waves but also avoid the involvement of seabed mud. Therefore, a wave compensation tube that is less affected by wind and wave impacts and can isolate mud is needed.

[0003] Chinese patent CN210768619U discloses a wave compensation casing device for offshore geotechnical engineering survey and drilling operations, the casing includes an inner casing and an outer casing sleeved outside the inner casing, there is a gap between the inner casing and the outer casing, the inner casing and the outer casing are slidably matched, the length of the inner casing is greater than the length of the outer casing, the inner casing is provided with a support plate in the circumferential direction near one end of the outer casing, the outer casing is fixed with a pressure cap in the circumferential direction away from the support plate, one end of the pressure cap is embedded in the gap, and the end of the outer casing away from the pressure cap is provided with a reducing coupling, the reducing coupling includes a large diameter end and a small diameter end, the large diameter end is connected to the outer casing, and the diameter of the small diameter end is smaller than the sum of the diameter of the inner casing and the thickness of the support plate. The design can automatically expand and contract to change the length of the casing according to the tidal difference, and has the effects of being less affected by the tide, less safety hazards, and ensuring smooth circulation of mud.

[0004] There are still several points for improvement in the above documents: only the telescopic sleeve can cope with the longitudinal impact of wind and waves, but lacks the ability to cope with the lateral impact of wind and waves; the inner layer pipe fixed connection sleeve is inconvenient to install and disassemble. Utility Model Content

[0005] In order to solve the problems of the prior art, the utility model provides a wave compensation casing for drilling operations in shallow water exploration, comprising an outer tube, a compensation tube and an inner tube, the outer tube comprising a flange, a fixed ring, a telescopic rod and a connector, two outer tubes are installed on both sides of the compensation tube, the inner tube passes through the outer tube and the compensation tube and is connected to the outer tube, the flange is installed at one end of the outer tube and is located at the connection between the outer tube and the compensation tube, the fixed ring is installed at the center of the outer tube and is embedded with the inner tube, one end of the telescopic rod is connected to the fixed ring, and the other end is connected to the inner wall of the outer tube.

[0006] Preferably, the fixed ring includes a boss and a first positioning frame, the boss is installed on the outside of the fixed ring, and the first positioning frame is vertically installed on the boss.

[0007] Preferably, the telescopic rod comprises a first turntable, a connecting rod and a spring, the first turntable is mounted at one end of the telescopic rod and is rotatably connected to the fixed collar, the connecting rod is mounted at the other end of the telescopic rod, and the spring is surrounded on the outside of the telescopic rod.

[0008] Preferably, the connector comprises a rotating frame and a groove, the groove is arranged at one end of the connector away from the inner wall of the outer tube, and the rotating frame is rotatably connected in the groove.

[0009] Preferably, the rotating frame includes a second positioning frame and a second rotating table, the second positioning frame is vertically mounted on the upper surface of the rotating frame, and the second rotating table is rotatably connected to the second positioning frame.

[0010] Preferably, the compensating tube comprises a corrugated layer, a positioning plate and a positioning hole, the corrugated layer is arranged on the outer surface of the compensating tube, the positioning plates are installed at both ends of the compensating tube, and the positioning hole is arranged on the positioning plate.

[0011] Preferably, the positioning plate comprises a protrusion, a rod hole and a fixing rod, the protrusion is mounted on the side of the positioning plate, the rod hole is arranged on the positioning plate, and the fixing rod is mounted in the rod hole.

[0012] Preferably, a screw is provided on the fixing rod, the screw is rotatably connected to the fixing rod and is located on the top of the protrusion.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model provides lateral compensation for the inner tube, so that it can cope with the lateral impact of wind and waves. Specifically, the outer tube and the compensation tube are connected to form a protective layer for the inner tube. The rotation and telescopic cooperation between the telescopic rod and the connector enables the fixed ring to obtain lateral compensation in the outer tube, thereby obtaining lateral compensation for the inner tube.

[0015] 2. The inner tube and the protective layer of the utility model are nested and installed, and the inner tube can be directly taken out for maintenance. Specifically, the fixed ring is used to position the inner tube, and the first positioning frame is rotatably connected to the telescopic rod so that the outer tube will not hit the fixed ring when subjected to the impact of wind and waves, thereby always maintaining the stability of the inner tube.

[0016] 3. The utility model uses a protective structure to adjust the degree of longitudinal compensation and improve the service life of parts. Specifically, the fixing rod is used to prevent the compensation tube from excessive expansion and contraction, thereby improving the service life of the compensation tube under the impact of wind and waves. The maximum expansion and contraction degree of the compensation tube is set by adjusting the distance between the screws on the fixing rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a stereoscopic view of a wave compensation casing for drilling operations in shallow water exploration.

[0018] Figure 2It is a stereoscopic diagram of the outer layer pipe of a wave compensation casing for drilling operations in shallow water exploration.

[0019] Figure 3 It is a stereoscopic view of a fixed ferrule in a wave compensation casing for drilling operations in shallow water exploration.

[0020] Figure 4 It is a stereoscopic diagram of a telescopic rod in a wave compensation casing for drilling operations in shallow water exploration.

[0021] Figure 5 It is a stereoscopic view of a connector in a wave compensation casing for drilling operations in shallow water exploration.

[0022] Figure 6 It is a stereoscopic diagram of a compensating tube in a wave compensating casing for drilling operations in shallow water exploration.

[0023] The numbers in the figure are: 1. outer tube; 2. flange; 3. fixing ring; 31. boss; 32. first positioning frame; 4. telescopic rod; 41. first turntable; 42. connecting rod; 43. spring; 5. connector; 51. rotating frame; 511. second positioning frame; 512. second turntable; 52. groove; 6. compensation tube; 61. corrugated layer; 62. positioning plate; 63. boss; 64. rod hole; 65. fixing rod; 651. screw; 66. positioning hole; 7. inner tube. DETAILED DESCRIPTION

[0024] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] See also Figure 1 to Figure 6 As shown, a wave compensation casing for drilling operations in shallow water exploration includes an outer tube 1, a compensation tube 6 and an inner tube 7. The outer tube 1 includes a flange 2, a fixed ring 3, a telescopic rod 4 and a connector 5. Two outer tubes 1 are installed on both sides of the compensation tube 6. The inner tube 7 passes through the outer tube 1 and the compensation tube 6 and is connected to the outer tube 1. The flange 2 is installed at one end of the outer tube 1 and is located at the connection between the outer tube 1 and the compensation tube 6. The fixed ring 3 is installed at the center of the outer tube 1 and is embedded with the inner tube 7. One end of the telescopic rod 4 is connected to the fixed ring 3, and the other end is connected to the inner wall of the outer tube 1.

[0026] The device forms a protective layer for the inner tube 7 by connecting the outer tube 1 and the compensation tube 6. The inner tube 7 is used to place drilling tools. The flange 2 is used to connect the outer tube 1 and the compensation tube 6. The fixed ring 3 is used to position the inner tube 7. The rotation and telescopic cooperation between the telescopic rod 4 and the connector 5 enables the fixed ring 3 to obtain lateral compensation in the outer tube 1, thereby allowing the inner tube 7 to obtain lateral compensation. The compensation tube 6 provides longitudinal compensation for the outer tube 1 by telescoping up and down. The inner tube 7 connected to the outer tube 1 remains stable under the balance of lateral and longitudinal compensation.

[0027] See also Figure 2-3 As shown, the fixed ring 3 includes a boss 31 and a first positioning frame 32 . The boss 31 is installed on the outside of the fixed ring 3 , and the first positioning frame 32 is vertically installed on the boss 31 .

[0028] The boss 31 is used to install the first positioning frame 32, and the first positioning frame 32 is rotatably connected to the telescopic rod 4 so that the outer layer pipe 1 will not hit the fixed ring 3 when subjected to the impact of wind and waves, thereby always maintaining the stability of the inner layer pipe 7.

[0029] See also Figure 3-4 As shown, the telescopic rod 4 includes a first turntable 41, a connecting rod 42 and a spring 43. The first turntable 41 is installed at one end of the telescopic rod 4 and is rotatably connected to the fixed ring 3. The connecting rod 42 is installed at the other end of the telescopic rod 4. The spring 43 is surrounded by the outside of the telescopic rod 4.

[0030] The engagement of the telescopic rod 4 and the connecting rod 42 can change the distance between the fixed ring 3 and the inner wall of the outer tube 1. The connecting rod 42 provides a certain rigidity for the telescopic rod 4 and its outer spring 43 to prevent excessive deformation from damaging the telescopic rod 4. The first turntable 41 is used to be rotatably connected to the first positioning frame 32 on the fixed ring 3 to avoid the telescopic rod 4 from causing rigid damage to the fixed ring 3. The spring 43 is used to reset the telescopic rod 4.

[0031] See also Figure 3 to Figure 5 As shown, the connector 5 includes a rotating frame 51 and a groove 52 . The groove 52 is arranged at one end of the connector 5 away from the inner wall of the outer tube 1 , and the rotating frame 51 is rotatably connected in the groove 52 .

[0032] The rotating frame 51 is installed on the connector 5 through the groove 52. The rotating frame 51 rotates to allow the fixed ring 3 and the telescopic rod 4 to form a certain offset outside the inner tube 7 to avoid rigid contact and damage to the inner tube 7.

[0033] See also Figure 5 As shown, the rotating frame 51 includes a second positioning frame 511 and a second rotating table 512 . The second positioning frame 511 is vertically installed on the upper surface of the rotating frame 51 , and the second rotating table 512 is rotatably connected to the second positioning frame 511 .

[0034] The second positioning frame 511 has the same principle as the first positioning frame 32 on the fixed ring 3 . The second turntable 512 is used to be rotatably connected with the connecting rod 42 on the telescopic rod 4 to prevent the connector 5 from causing rigid damage to the telescopic rod 4 .

[0035] See also Figure 1 to Figure 6 As shown, the compensating tube 6 includes a corrugated layer 61 , a positioning plate 62 and a positioning hole 66 . The corrugated layer 61 is arranged on the outer surface of the compensating tube 6 . The positioning plate 62 is installed at both ends of the compensating tube 6 . The positioning hole 66 is arranged on the positioning plate 62 .

[0036] The corrugated layer 61 makes the compensating pipe 6 have a certain elasticity so as to withstand the impact of waves in the vertical direction. The size of the positioning plate 62 corresponds to that of the flange 2 , and the positioning hole 66 is used to fix the positioning plate 62 and the flange 2 .

[0037] See also Figure 6 As shown, the positioning plate 62 includes a protrusion 63 , a rod hole 64 and a fixing rod 65 . The protrusion 63 is installed on the side of the positioning plate 62 , the rod hole 64 is provided on the positioning plate 62 , and the fixing rod 65 is installed in the rod hole 64 .

[0038] The protrusion 63 is used to set the rod hole 64 and provide a positioning guide for the installation of the fixing rod 65. The fixing rod 65 is used to prevent the compensation tube 6 from excessive expansion and contraction, thereby increasing the service life of the compensation tube 6 under the impact of wind and waves.

[0039] See also Figure 1 to Figure 6 As shown, a screw 651 is provided on the fixing rod 65 , and the screw 651 is rotatably connected to the fixing rod 65 and is located on the top of the protrusion 63 .

[0040] The screw 651 is rotated on the fixing rod 65 to clamp the positioning plates 62 at both ends of the compensation tube 6. The maximum telescopic degree of the compensation tube 6 is set by adjusting the distance of the screw 651 on the fixing rod 65.

[0041] The above embodiments only express one or several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims

1. A wave compensation casing for drilling operations in shallow water exploration, comprising an outer layer pipe (1), a compensation pipe (6) and an inner layer pipe (7); It is characterized in that The outer tube (1) comprises a flange (2), a fixed ring (3), a telescopic rod (4) and a connector (5). The two outer tubes (1) are installed on both sides of the compensation tube (6). The inner tube (7) passes through the outer tube (1) and the compensation tube (6) and is connected to the outer tube (1). The flange (2) is installed at one end of the outer tube (1) and is located at the connection between the outer tube (1) and the compensation tube (6). The fixed ring (3) is installed at the center of the outer tube (1) and is embedded with the inner tube (7). One end of the telescopic rod (4) is connected to the fixed ring (3), and the other end is connected to the inner wall of the outer tube (1).

2. A wave compensation casing for drilling operations for shallow sea exploration according to claim 1, characterized in that: The fixed ferrule (3) comprises a boss (31) and a first positioning frame (32), wherein the boss (31) is mounted on the outside of the fixed ferrule (3), and the first positioning frame (32) is vertically mounted on the boss (31).

3. The wave compensation casing for drilling operation in shallow water exploration according to claim 1, characterized in that: The telescopic rod (4) comprises a first turntable (41), a connecting rod (42) and a spring (43). The first turntable (41) is mounted on one end of the telescopic rod (4) and is rotatably connected to the fixed collar (3). The connecting rod (42) is mounted on the other end of the telescopic rod (4). The spring (43) surrounds the outside of the telescopic rod (4).

4. The wave compensation casing for drilling operation in shallow water exploration according to claim 1, characterized in that: The connector (5) comprises a rotating frame (51) and a groove (52). The groove (52) is arranged at one end of the connector (5) away from the inner wall of the outer tube (1), and the rotating frame (51) is rotatably connected in the groove (52).

5. A wave compensation casing for drilling operations for shallow sea exploration according to claim 4, characterized in that: The rotating frame (51) comprises a second positioning frame (511) and a second rotating table (512). The second positioning frame (511) is vertically mounted on the upper surface of the rotating frame (51), and the second rotating table (512) is rotatably connected to the second positioning frame (511).

6. The wave compensation casing for drilling operation in shallow water exploration according to claim 1, characterized in that: The compensating tube (6) comprises a corrugated layer (61), a positioning plate (62) and a positioning hole (66); the corrugated layer (61) is arranged on the outer surface of the compensating tube (6); the positioning plate (62) is installed at both ends of the compensating tube (6); and the positioning hole (66) is arranged on the positioning plate (62).

7. A wave compensation casing for drilling operations for shallow sea exploration according to claim 6, characterized in that: The positioning plate (62) comprises a protrusion (63), a rod hole (64) and a fixing rod (65), wherein the protrusion (63) is mounted on the side of the positioning plate (62), the rod hole (64) is arranged on the positioning plate (62), and the fixing rod (65) is mounted in the rod hole (64).

8. The wave compensation casing for drilling operation in shallow water exploration according to claim 7, characterized in that: The fixing rod (65) is provided with a screw (651), which is rotatably connected to the fixing rod (65) and is located at the top of the protrusion (63).

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