Efficient environment-friendly rotary blowout preventer

Abstract

The invention discloses an efficient environment-friendly rotary blowout preventer, and relates to the technical field of well drilling equipment, the efficient environment-friendly rotary blowout preventer comprises a lifting and placing tool, the lifting and placing tool comprises an upper joint, a lower joint and a driving device, and the driving device is used for driving the upper joint to move spatially; the rotary control head comprises a J-shaped groove outer cylinder, an upper sealing cover, an upper rubber core, an upper outer cylinder, a lower outer cylinder and a central pipe, a lower rubber core is arranged at the bottom of the central pipe, the upper sealing cover and the upper rubber core are both arranged in the upper outer cylinder, the J-shaped groove outer cylinder is used for being clamped and fixed with the upper connector, and the upper sealing cover and the upper rubber core are used for being clamped and fixed with the lower connector; a cavity used for containing the lower portion of the lower outer cylinder and the lower rubber core is formed in the shell assembly, the lower portion of the lower outer cylinder and the shell assembly are provided with an oil injection channel and a cooling liquid channel in a matched mode, and a liquid injection hole is formed in the outer wall of the shell assembly. According to the device, the rotary control head can be automatically lifted and put down, unmanned operation of a well mouth can be achieved, and the circulating cooling and lubricating effects of the rotary control head can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling equipment, and more specifically, to an efficient and environment-friendly rotating blowout preventer. Background Art

[0002] In the related art, the rotating blowout preventer is a key device for pressure-controlled drilling, which is installed at the top of the blowout preventer group at the wellhead and mainly functions to seal the wellhead annulus and divert flow. In the traditional rotating blowout preventer, the oil injection and coolant pipelines are both arranged at the cover of the rotating control head and are connected and injected through quick-change joints. The rotating opening and closing type clamp is used to hold tightly and is locked by safety locking bolts. When tripping operations are carried out, mud will splash onto the wellhead and the ground, causing pollution to the surrounding environment. Moreover, because personnel need to climb to the wellhead to disassemble the oil pipeline, coolant pipeline and safety locking bolts when lifting and lowering the rotating control head, which belongs to high-altitude operation, there are risks such as falling from height and mud pollution, lengthening the non-productive time and increasing the production cost.

[0003] In summary, how to realize the automatic lifting and lowering of the rotating control head, unmanned operation at the wellhead, and ensure the circulating cooling and lubrication effects of the rotating control head are problems that need to be solved urgently by those skilled in the art at present. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an efficient and environment-friendly rotating blowout preventer, which can realize the automatic lifting and lowering of the rotating control head, unmanned operation at the wellhead, and ensure the circulating cooling and lubrication effects of the rotating control head.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An efficient and environment-friendly rotating blowout preventer, comprising:

[0007] A lifting tool, which includes an upper joint, a lower joint arranged at the bottom of the upper joint, and a driving device connected to the top of the upper joint, and the driving device is used to drive the upper joint to move in space;

[0008] A rotating control head, including a J-groove outer cylinder, an upper cover arranged at the bottom of the J-groove outer cylinder, an upper rubber core arranged at the bottom of the upper cover, an upper outer cylinder, a lower outer cylinder arranged at the bottom of the upper outer cylinder, and a central pipe arranged in the lower outer cylinder. A lower rubber core is arranged at the bottom of the central pipe. The upper cover and the upper rubber core are both arranged in the upper outer cylinder. The J-groove outer cylinder is used to be clamped and fixed with the upper joint, and the upper cover and the upper rubber core are used to be clamped and fixed with the lower joint;

[0009] The housing assembly is internally provided with a cavity for accommodating the lower part of the lower outer cylinder and the lower rubber core, and an oil injection channel and a coolant channel are cooperatively arranged between the lower part of the lower outer cylinder and the housing assembly. Liquid injection holes communicating with the oil injection channel and the coolant channel respectively are arranged on the outer wall of the housing assembly.

[0010] In one embodiment, a cylindrical roller thrust bearing is arranged on the outer peripheral side of the central tube. A single-row cylindrical roller bearing is arranged at the upper end of the cylindrical roller thrust bearing, and a double-row cylindrical roller thrust bearing is arranged at the lower end of the cylindrical roller thrust bearing.

[0011] In one embodiment, an anti-pollution cover sleeved on the rotary control head is further included, and the minimum inner diameter of the anti-pollution cover is greater than the maximum outer diameter of the rotary control head.

[0012] In one embodiment, a fixing assembly is further included, which includes a cage base arranged at the top of the housing assembly, a clamp cage arranged on the cage base, at least two clamps evenly distributed along the outer wall of the lower outer cylinder, a hydraulic cylinder for driving each clamp to move horizontally, and a cage cover plate arranged at the upper end of the clamp cage.

[0013] The clamp cage is distributed in an annular shape. The clamps are evenly arranged along the circumference on the inner side of the clamp cage, and the telescopic end of the hydraulic cylinder passes through the clamp cage and is connected with the clamp.

[0014] In one embodiment, a clamp guide plate and a metal spacer ring arranged on the cage base are further included.

[0015] The clamp guide plate is used to limit the moving direction of the clamp, and the metal spacer ring is used to form a sealed annular cavity with the clamp, the clamp cage and the housing assembly when the clamp is closed.

[0016] In one embodiment, the two hydraulic cylinders are symmetrically distributed along the circumference of the housing assembly, and a piston chamber oil port extension pipe and a non-piston chamber oil port extension pipe are arranged at the end of the hydraulic cylinder.

[0017] An oil distribution and oil collection block is arranged on one side of the housing assembly. Two groups of oil circuits are arranged in the oil distribution and oil collection block, and three groups of quick connectors are arranged outside the oil distribution and oil collection block. The quick connectors are used to connect the piston chamber oil port extension pipe, the non-piston chamber oil port extension pipe and the hydraulic control system respectively.

[0018] In one embodiment, the housing assembly includes a base housing with the cavity internally. A groove matched with the clamp is arranged at the upper part of the base housing, and fourth sealing grooves are arranged on both sides of the groove.

[0019] In one embodiment, the coolant channel includes a coolant injection passage, a coolant return passage symmetrically distributed with the coolant injection passage, and a coolant injection tank. The coolant injection passage and the coolant return passage are both provided in the lower outer cylinder, and the coolant injection tank is provided on the outer wall of the lower outer cylinder;

[0020] The oil injection channel includes two lubricating oil injection pipelines and a lubricating oil injection tank that are completely symmetrically distributed. The lubricating oil injection pipelines are provided in the lower outer cylinder, and the lubricating oil injection tank is provided on the outer wall of the lower outer cylinder;

[0021] An upper sealing assembly is clamped between the top of the central tube and the lower outer cylinder. A coolant circulation chamber is provided between the upper sealing assembly and the lower outer cylinder, and a cooling chamber is provided between the lower part of the lower outer cylinder and the housing assembly;

[0022] The injection holes include a coolant return hole, a coolant injection hole, a first oil injection hole, and a second oil injection hole. The coolant is injected into the coolant injection tank through the coolant injection hole, enters the coolant circulation chamber along the coolant injection passage, then enters the cooling chamber along the coolant return passage, and finally flows to the coolant return hole; the lubricating oil is injected into the lubricating oil injection tank through the first oil injection hole or the second oil injection hole and enters the bearing chamber of the rotary control head along the lubricating oil injection pipeline.

[0023] In one embodiment, a first sealing inclined surface at a first angle to the central axis and a second sealing inclined surface at a second angle to the central axis are provided inside the base housing, and the first sealing inclined surface and the second sealing inclined surface are both in mating contact with corresponding positions of the rotary control head.

[0024] In one embodiment, a grease filling groove and a Y-shaped sealing ring are provided inside the upper sealing assembly.

[0025] When using the high-efficiency and environment-friendly rotary blowout preventer provided by the present invention, first, an upper cover can be installed at the bottom of the J-groove outer cylinder, an upper rubber core can be installed at the bottom of the upper cover, and then the upper rubber core can be inserted into the upper outer cylinder. The lower outer cylinder can be installed at the bottom of the upper outer cylinder, the top of the central tube can be inserted into the lower outer cylinder, and a lower rubber core can be installed at the bottom of the central tube to complete the assembly of the rotary control head. Then, the driving device can be controlled to operate so as to insert the lifting tool downward into the rotary control head, so that the upper joint is inserted into the J-groove outer cylinder and the two are clamped and fixed, and the lower joint is inserted into the upper cover and the upper rubber core so that the lower joint and the upper rubber core are clamped and fixed.

[0026] After that, the driving device can be controlled to continue running, so as to drive the assembled lifting and lowering tool and the rotary control head to move downward together, so that the lower part of the rotary control head is inserted into the housing assembly, the lower rubber core is inserted into the cavity of the housing assembly, and the bottom of the lower outer cylinder can be fixed on the top of the housing assembly. That is, the upper part of the rotary control head can be connected to the lifting and lowering tool to realize the lifting and inserting operation of the rotary control head, so as to reduce the operation intensity of the operator and improve the operation efficiency.

[0027] When the rotary control head and the housing assembly are assembled in place, the lower part of the lower outer cylinder and the housing assembly cooperate to form an oil injection channel and a coolant channel. Finally, when it is necessary to inject coolant and lubricating oil into the rotary control head, the corresponding liquid can be injected into the corresponding channel through the liquid injection hole on the outer wall of the housing assembly to lubricate and cool the rotary control head. Therefore, the disassembly and assembly operations of the oil circuit and the coolant pipeline of this device are simple, safe and convenient. There is no need for the operator to climb to the wellhead to disassemble the oil circuit, the coolant pipeline and the locking bolts, etc., effectively reducing high-altitude operations, realizing unmanned operation at the wellhead, and improving work efficiency.

[0028] In summary, the high-efficiency and environmentally friendly rotary blowout preventer provided by the present invention can realize the automatic lifting and lowering of the rotary control head, unmanned operation at the wellhead, and ensure the circulating cooling and lubrication effects of the rotary control head. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0030] Figure 1 It is an overall assembly sectional view of the high-efficiency and environmentally friendly rotary blowout preventer provided by the present invention;

[0031] Figure 2 It is a structural schematic diagram of the lifting and lowering tool;

[0032] Figure 3 It is a structural schematic diagram of the rotary control head;

[0033] Figure 4 It is a sectional view of the fixing assembly;

[0034] Figure 5 It is a sectional view of the housing assembly;

[0035] Figure 6 It is an internal installation schematic diagram of the fixing assembly;

[0036] Figure 7 It is an external view schematic diagram of the fixing assembly;

[0037] Figure 8 It is the installation external view of the housing assembly and the fixing assembly;

[0038] Figure 9 It is the explosion view of the high-efficiency and environment-friendly rotating blowout preventer.

[0039] Figures 1-9 Among them:

[0040] 1 is the lifting tool, 2 is the anti-pollution cover, 3 is the rotating control head, 4 is the fixing assembly, 5 is the housing assembly, 6 is the upper joint, 7 is the thrust bearing gland, 8 is the outer cylinder of J-groove, 9 is the upper cover, 10 is the lower joint, 11 is the upper rubber core, 12 is the upper outer cylinder, 13 is the central pipe, 14 is the upper bearing seal cover, 15 is the grease filling groove, 16 is the upper bushing, 17 is the upper seal assembly, 18 is the single-row cylindrical roller bearing, 19 is the lower outer cylinder, 20 is the coolant injection passage, 21 is the cylindrical roller thrust bearing, 22 is the bearing seat, 23 is the double-row cylindrical roller bearing, 24 is the lower seal, 25 is the lower rubber core suspension, 26 is the lower rubber core, 27 is the Y-shaped sealing ring, 28 is the coolant circulation chamber, 29 is the coolant return passage, 30 is the lubricating oil injection pipeline, 31 is the coolant injection tank, 32 is the lubricating oil injection tank, 33 is the metal spacer ring, 34 is the cage cover plate, 35 is the cylinder guard, 36 is the position indicating rod, 37 is the position indicating bolt, 38 is the cylinder, 39 is the clamp, 40 is the clamp cage, 41 is the cage base, 42 is the clamp guide plate, 43 is the piston chamber oil port extension pipe, 44 is the non-piston chamber oil port extension pipe, 45 is the oil distribution and oil collecting block, 46 is the base housing, 47 is the first sealing inclined plane, 48 is the second sealing inclined plane, 49 is the cooling chamber, A is the coolant return hole, B is the first oil injection hole, C is the coolant injection hole, D is the second oil injection hole. Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] The core of the present invention is to provide a high-efficiency and environment-friendly rotating blowout preventer, which can realize the automatic lifting and lowering of the rotating control head, unmanned operation at the wellhead, and ensure the circulating cooling and lubrication effects of the rotating control head.

[0043] Please refer to Figures 1 to 9 .

[0044] This specific embodiment provides a high-efficiency and environment-friendly rotating blowout preventer, including:

[0045] A lifting and lowering tool 1, which includes an upper sub 6, a lower sub 10 provided at the bottom of the upper sub 6, and a driving device connected to the top of the upper sub 6, and the driving device is used to drive the upper sub 6 to move in space;

[0046] A rotary control head 3, including a J-groove outer cylinder 8, an upper cover 9 provided at the bottom of the J-groove outer cylinder 8, an upper rubber core 11 provided at the bottom of the upper cover 9, an upper outer cylinder 12, a lower outer cylinder 19 provided at the bottom of the upper outer cylinder 12, and a central pipe 13 provided inside the lower outer cylinder 19. A lower rubber core 26 is provided at the bottom of the central pipe 13. The upper cover 9 and the upper rubber core 11 are both provided inside the upper outer cylinder 12. The J-groove outer cylinder 8 is used to be clamped and fixed with the upper sub 6, and the upper cover 9 and the upper rubber core 11 are used to be clamped and fixed with the lower sub 10;

[0047] A housing assembly 5, which has a cavity for accommodating the lower part of the lower outer cylinder 19 and the lower rubber core 26, and an oil injection channel and a coolant channel are provided in cooperation between the lower part of the lower outer cylinder 19 and the housing assembly 5. Liquid injection holes communicating with the oil injection channel and the coolant channel respectively are provided on the outer wall of the housing assembly 5.

[0048] It should be noted that a thrust bearing gland 7 can be provided between the upper sub 6 and the lower sub 10, and moreover, an upper bushing 16 can be provided on the outer peripheral part of the upper end of the central pipe 13. In the actual application process, the shapes, structures, types, etc. of the lifting and lowering tool 1, the rotary control head 3, and the housing assembly 5 can be determined according to the actual situation and actual needs.

[0049] When using the high-efficiency and environment-friendly rotary blowout preventer provided by the present invention, first, the upper cover 9 can be installed at the bottom of the J-groove outer cylinder 8, the upper rubber core 11 can be installed at the bottom of the upper cover 9, then the upper rubber core 11 can be inserted into the upper outer cylinder 12, the lower outer cylinder 19 can be installed at the bottom of the upper outer cylinder 12, the top of the central pipe 13 can be inserted into the lower outer cylinder 19, and the lower rubber core 26 can be installed at the bottom of the central pipe 13 to complete the assembly of the rotary control head 3. Then, the driving device can be controlled to operate to insert the lifting and lowering tool 1 downward into the rotary control head 3, so that the upper sub 6 is inserted into the J-groove outer cylinder 8 and the two are clamped and fixed, and the lower sub 10 is inserted into the upper cover 9 and the upper rubber core 11 to make the lower sub 10 and the upper rubber core 11 clamped and fixed.

[0050] After that, the driving device can be controlled to continue to operate to drive the assembled lifting and lowering tool 1 and the rotary control head 3 to move downward together, so as to insert the lower part of the rotary control head 3 into the housing assembly 5, so that the lower rubber core 26 is inserted into the cavity of the housing assembly 5, and the bottom of the lower outer cylinder 19 can be fixed at the top of the housing assembly 5. That is, the upper part of the rotary control head 3 can be connected to the lifting and lowering tool 1 to realize the lifting and inserting operation of the rotary control head 3, so as to reduce the operation intensity of the operator and improve the operation efficiency.

[0051] After the rotary control head 3 and the housing assembly 5 are assembled in place, the lower part of the lower outer cylinder 19 and the housing assembly 5 cooperate to form an oil injection channel and a coolant channel. Finally, when it is necessary to inject coolant and lubricating oil into the rotary control head 3, the corresponding liquid can be injected into the corresponding channel through the liquid injection hole on the outer wall of the housing assembly 5 to lubricate and cool the rotary control head 3. Therefore, the disassembly and assembly operations of the oil circuit and the coolant pipeline of this device are simple, safe and convenient. There is no need for operators to climb to the wellhead to disassemble the oil circuit, the coolant pipeline and the locking bolts, etc., effectively reducing high-altitude operations, realizing unmanned operation at the wellhead, and improving work efficiency.

[0052] In summary, the high-efficiency and environment-friendly rotary blowout preventer provided by the present invention can realize automatic lifting and lowering of the rotary control head, unmanned operation at the wellhead, and can ensure the circulating cooling and lubrication effects of the rotary control head.

[0053] In one embodiment, a cylindrical roller thrust bearing 21 is arranged on the outer peripheral side of the central pipe 13. A single-row cylindrical roller bearing 18 is arranged at the upper end of the cylindrical roller thrust bearing 21, and a double-row cylindrical roller thrust bearing 23 is arranged at the lower end of the cylindrical roller thrust bearing 21.

[0054] It should be noted that a bearing seat 22 can be arranged on the outer peripheral part of the central pipe 13, and the cylindrical roller thrust bearing 21 and the double-row cylindrical roller thrust bearing 23 are respectively installed at the upper and lower ends of the bearing seat 22. A lower seal 24 is arranged at the bottom of the double-row cylindrical roller thrust bearing 23, and the lower seal 24 can seal the bottom of the central pipe 13 and the bottom of the lower outer cylinder 19. In addition, the bottom of the central pipe 13 and the top of the lower rubber core 26 can be connected through a lower rubber core suspension 25.

[0055] In one embodiment, it further includes a dirt-proof cover 2 sleeved on the rotary control head 3, and the minimum inner diameter of the dirt-proof cover 2 is greater than the maximum outer diameter of the rotary control head 3.

[0056] It should be noted that the dirt-proof cover 2 can be installed on the top of the housing assembly 5. Since the minimum inner diameter of the dirt-proof cover 2 is greater than the maximum outer diameter of the rotary control head 3, when the rotary control head 3 is inserted into the housing assembly 5 under the driving action of the lifting tool 1, the dirt-proof cover 2 will not hinder the insertion process. Moreover, the dirt-proof cover 2 can effectively prevent the mud generated when the rotary control head 3 operates from splashing outwards.

[0057] In one embodiment, it further includes a fixing assembly 4, which includes a cage base 41 arranged on the top of the housing assembly 5, a clamp cage 40 arranged on the cage base 41, at least two clamps 39 evenly distributed along the outer wall of the lower outer cylinder 19, a hydraulic cylinder 38 for driving each clamp 39 to move horizontally, and a cage cover 34 arranged at the upper end of the clamp cage 40;

[0058] The clamp cage 40 is distributed in a circular ring shape. Clamps 39 are evenly arranged along the circumference on the inner side of the clamp cage 40, and the telescopic end of the hydraulic cylinder 38 passes through the clamp cage 40 and is connected to the clamp 39.

[0059] It should be noted that using the hydraulic cylinder 38 to drive the clamp 39 to move linearly is beneficial to the smooth opening and closing of the clamp 39. When the hydraulic cylinder 38 drives the clamps 39 to move horizontally and approach each other, the outer wall of the lower outer cylinder 19 can be clamped; when the rotary control head 3 needs to be taken out, the hydraulic cylinder 38 can be controlled to run in the reverse direction to drive the clamps 39 to move horizontally and away from each other to loosen the outer wall of the lower outer cylinder 19.

[0060] In one embodiment, it further includes a clamp guide plate 42 and a metal spacer ring 33 provided on the cage base 41; the clamp guide plate 42 is used to limit the moving direction of the clamp 39, and the metal spacer ring 33 is used to form a sealed annular cavity with the clamp 39, the clamp cage 40 and the housing assembly 5 when the clamp 39 is closed.

[0061] It should be noted that the lower part of the metal spacer ring 33 can pass through the gap of the clamp 39 and is connected to the housing assembly 5 by bolts. When multiple clamps 39 approach each other and are in a closed and clamped state, a sealed space is formed among the clamp cage 40, the cage base 41, the cage cover plate 34, the clamp 39 and the metal spacer ring 33, which can reduce the erosion of the piston rod of the hydraulic cylinder 38 caused by the intrusion of mud. At the same time, the sewage discharge hole provided at the lower part of the clamp cage 40 can be connected to a water pipe to flush the mud that enters the sealed space due to the removal and installation of the rotary control head 3.

[0062] In addition, it should be noted that a hydraulic cylinder guard 35 can be installed outside the hydraulic cylinder 38, a groove is provided on the outer wall of the clamp 39, one end of the position indicating rod 36 is fixed in the groove, and the other end of the position indicating rod 36 passes through the hydraulic cylinder guard 35 and is connected to the position indicating bolt 37. When the clamp 39 is opened and closed, the position indicating rod 36 can be driven to move synchronously, and the operator can observe the position of the position indicating bolt 37 on the outside to indirectly observe and judge the opening and closing state and position of the clamp 39.

[0063] In one embodiment, two hydraulic cylinders 38 are symmetrically distributed along the circumference of the housing assembly 5, and a piston chamber oil port extension pipe 43 and a non-piston chamber oil port extension pipe 44 are provided at the end of the hydraulic cylinder 38; an oil distribution and oil collecting block 45 is provided on one side of the housing assembly 5, two groups of oil circuits are provided in the oil distribution and oil collecting block 45, and three groups of quick connectors are provided outside the oil distribution and oil collecting block 45. The quick connectors are used to connect the piston chamber oil port extension pipe 43, the non-piston chamber oil port extension pipe 44 and the hydraulic control system respectively.

[0064] It should be noted that the piston chamber oil port extension pipe 43 and the non-piston chamber oil port extension pipe 44 of the hydraulic cylinder 38 are externally placed, which facilitates the connection and disassembly operations of the oil pipes for the hydraulic cylinder 38. The two quick connectors on the same side of the upper part of the oil distribution and collection block 45 are respectively connected to the oil receiving pipes of the hydraulic cylinders 38 on the same side, and one quick connector at the lower part of the oil distribution and collection block 45 is connected to the hydraulic control system. Among them, there are three groups of quick connectors, that is, a total of six quick connectors. Moreover, the two quick connectors on the upper part of the oil distribution and collection block 45 are respectively connected to the quick connector at the lower part of the oil distribution and collection block 45 through two groups of oil circuits.

[0065] Therefore, when the hydraulic cylinder 38 needs to be driven to operate, the oil fluid of the hydraulic control system enters the oil distribution and collection block through the quick connector at the lower part, then flows into the quick connectors at the upper part through two groups of oil circuits respectively, and then flows into the piston chamber oil port extension pipe 43 and the non-piston chamber oil port extension pipe 44 through the quick connectors at the upper part, so as to realize the telescopic drive of the hydraulic cylinder 38. By setting the oil distribution and collection block 45, the two hydraulic cylinders are both connected to the same oil distribution and collection block 45, and the oil distribution and collection block 45 is used to distribute the oil fluid to multiple hydraulic cylinders, so as to realize the synchronous opening and closing control of multiple hydraulic cylinders.

[0066] In one embodiment, the housing assembly 5 includes a base housing 46 with a cavity inside. The upper part of the base housing 46 is provided with a groove that cooperates with the clamp 39, and fourth sealing grooves are provided on both sides of the groove. The setting of the groove helps to define the movement track of the clamp 39. The fourth sealing grooves are provided on both sides of the groove to improve the sealing effect between the clamp 39 and the base housing 46. In addition, during use, according to the actual situation and actual requirements, components such as a mud umbrella can be installed on the top of the base housing 46 to effectively prevent the drilling fluid from overflowing and splashing outwards.

[0067] In one embodiment, the coolant channel includes a coolant injection passage 20, a coolant return passage 29 symmetrically distributed with the coolant injection passage 20, and a coolant injection groove 31. The coolant injection passage 20 and the coolant return passage 29 are both arranged inside the lower outer cylinder 19, the coolant injection groove 31 is arranged on the outer wall of the lower outer cylinder 19, and a first sealing groove and a second sealing groove are respectively arranged on the upper and lower sides of the coolant injection groove 31;

[0068] The oil injection channel includes two completely symmetrically distributed lubricating oil injection pipelines 30 and a lubricating oil injection groove 32. The lubricating oil injection pipelines 30 are arranged inside the lower outer cylinder 19, the lubricating oil injection groove 32 is arranged on the outer wall of the lower outer cylinder 19 and is located below the second sealing groove, and a third sealing groove is arranged on the lower side of the lubricating oil injection groove 32;

[0069] An upper sealing assembly 17 is clamped between the top of the central tube 13 and the top of the lower outer cylinder 19. A coolant circulation chamber 28 is provided between the upper sealing assembly 17 and the lower outer cylinder 19, and a cooling chamber 49 is provided between the lower part of the lower outer cylinder 19 and the housing assembly 5. Moreover, an upper bearing seal cover 14 can be provided to cover the top of the lower outer cylinder 19 to cover and seal the upper sealing assembly 17.

[0070] The liquid injection holes include a coolant return hole A, a coolant injection hole C, a first oil injection hole B, and a second oil injection hole D. The coolant is injected into the coolant injection groove 31 through the coolant injection hole C, enters the coolant circulation chamber 28 along the coolant injection passage 20, then enters the cooling chamber 49 along the coolant return passage 29, and finally flows to the coolant return hole A. The lubricating oil is injected into the lubricating oil injection groove 32 through the first oil injection hole B or the second oil injection hole D and enters the bearing chamber of the rotary control head 3 along the lubricating liquid injection pipeline 30.

[0071] It should be noted that forming a coolant circulation chamber 28 between the upper sealing assembly 17 and the lower outer cylinder 19 helps to improve the cooling effect on the upper part of the rotary control head 3. The coolant injection passage 20 provided in the lower outer cylinder 19 has a sealing inclined plane that forms a 12° angle with the central axis. First and second sealing grooves are respectively provided on the upper and lower sides of the coolant injection groove 31, and O-rings are installed in the first and second sealing grooves. A lubricating oil injection groove 32 is provided on the lower side of the second sealing groove, and a third sealing groove is provided on the lower side of the lubricating oil injection groove 32, and an O-ring is installed in the third sealing groove to form a stepped shoulder.

[0072] Among them, the lower outer cylinder 19 is provided with a coolant return passage 29. The coolant return passage 29 has only one outlet at the lower part. The coolant return passage 29 is symmetrically arranged with the coolant injection passage 20, and the coolant injection passage 20 has only one inlet. The coolant injection passage 20 and the coolant return passage 29 are located in the upper part of the same pitch circle. Moreover, lubricating oil injection pipelines 30 are symmetrically arranged at 90° on the left and right sides in the upper part of the pitch circle (the two lubricating oil injection pipelines 30 are completely symmetrical and have the function of one for use and one for backup). The lower part of the lower outer cylinder 19 is provided with a sealing inclined plane that forms a 30° angle with the central axis, and a cooling chamber 49 can be formed between this seal and the base housing 46.

[0073] In addition, it should be noted that the lubricating oil pipeline and the coolant pipeline of this device are arranged on the base housing 46 and the lower outer cylinder 19, and the liquid injection holes are arranged on the base housing 46. The operator can inject the coolant into the coolant channel and inject the lubricating oil into the oil injection channel without performing high-altitude operations, reducing the operation intensity of the operator and improving the operation safety of the operator.

[0074] In one embodiment, a first sealing inclined surface 47 at a first included angle with the central axis and a second sealing inclined surface 48 at a second included angle with the central axis are provided inside the base housing 46, and the first sealing inclined surface 47 and the second sealing inclined surface 48 are respectively in contact and cooperation with corresponding positions of the rotary control head 3. Therefore, during the assembly of the whole machine, the first sealing inclined surface 47 and the second sealing inclined surface 48 are respectively in contact and cooperation with corresponding positions of the rotary control head 3, further clamping and fixing the rotary control head 3. Moreover, with the assistance of the clamp 39, the centering effect of the rotary control head 3 in the housing assembly 5 can be enhanced.

[0075] In one embodiment, a grease filling groove 15 and a Y-shaped sealing ring 27 are provided inside the upper sealing assembly 17. The grease filling groove 15 provided in the upper sealing assembly 17 can reduce the frictional loss between the upper bushing 16 and the Y-shaped sealing ring 27 and enhance the sealing effect.

[0076] It should be noted that for the first sealing groove, the second sealing groove, the third sealing groove, the fourth sealing groove, the first oil injection hole B, the second oil injection hole D, the first sealing inclined surface 47 and the second sealing inclined surface 48 mentioned in the present invention, the first, second, third and fourth are only used to distinguish different positions and there is no order of precedence.

[0077] In addition, it should also be noted that the orientation or positional relationship indicated by "up and down", "inside and outside", etc. in the present invention is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplified description and understanding, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0078] In the description of this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. Any combination of all the embodiments provided by the present invention falls within the protection scope of this invention and will not be elaborated here.

[0079] The efficient and environment-friendly rotary blowout preventer provided by the present invention has been introduced in detail above. Specific examples are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An efficient and environmentally friendly rotating blowout preventer, characterized in that, it comprises: a lifting and lowering tool (1), which includes an upper joint (6), a lower joint (10) provided at the bottom of the upper joint (6), and a driving device connected to the top of the upper joint (6), and the driving device is used to drive the upper joint (6) to move in space; a rotary control head (3), which includes a J-groove outer cylinder (8), an upper cover (9) provided at the bottom of the J-groove outer cylinder (8), an upper rubber core (11) provided at the bottom of the upper cover (9), an upper outer cylinder (12), a lower outer cylinder (19) provided at the bottom of the upper outer cylinder (12), and a central pipe (13) provided in the lower outer cylinder (19). A lower rubber core (26) is provided at the bottom of the central pipe (13). The upper cover (9) and the upper rubber core (11) are both provided in the upper outer cylinder (12). The J-groove outer cylinder (8) is used to be clamped and fixed with the upper joint (6), and the upper cover (9) and the upper rubber core (11) are used to be clamped and fixed with the lower joint (10); a housing assembly (5), which is internally provided with a cavity for accommodating the lower part of the lower outer cylinder (19) and the lower rubber core (26), and an oil injection channel and a coolant channel are cooperatively provided between the lower part of the lower outer cylinder (19) and the housing assembly (5). Liquid injection holes communicating with the oil injection channel and the coolant channel are provided on the outer wall of the housing assembly (5).

2. The efficient and environmentally friendly rotating blowout preventer according to claim 1, characterized in that, a cylindrical roller thrust bearing (21) is provided on the outer peripheral side of the central pipe (13). A single-row cylindrical roller bearing (18) is provided at the upper end of the cylindrical roller thrust bearing (21), and a double-row cylindrical roller thrust bearing (23) is provided at the lower end of the cylindrical roller thrust bearing (21).

3. The efficient and environmentally friendly rotating blowout preventer according to claim 1, characterized in that, it further includes an anti-pollution cover (2) sleeved on the rotary control head (3), and the minimum inner diameter of the anti-pollution cover (2) is greater than the maximum outer diameter of the rotary control head (3).

4. The efficient and environmentally friendly rotating blowout preventer according to any one of claims 1 to 3, characterized in that, it further includes a fixing assembly (4), which includes a cage base (41) provided on the top of the housing assembly (5), a clamp cage (40) provided on the cage base (41), at least two clamps (39) evenly distributed along the outer wall of the lower outer cylinder (19), a hydraulic cylinder (38) for driving each clamp (39) to move horizontally, and a cage cover plate (34) provided at the upper end of the clamp cage (40); the clamp cage (40) is distributed in a circular ring shape, the clamps (39) are evenly provided along the circumference on the inner side of the clamp cage (40), and the telescopic end of the hydraulic cylinder (38) passes through the clamp cage (40) and is connected to the clamp (39).

5. The efficient and environmentally friendly rotating blowout preventer according to claim 4, characterized in that, it further includes a clamp guide plate (42) and a metal spacer ring (33) provided on the cage base (41); The clamp guide plate (42) is used to limit the moving direction of the clamp (39), and the metal spacer ring (33) is used to form a sealed annular cavity with the clamp (39), the clamp cage (40) and the housing assembly (5) when the clamp (39) is closed.

6. The high-efficiency and environment-friendly rotating blowout preventer according to claim 4, characterized in that, the two hydraulic cylinders (38) are symmetrically distributed along the circumference of the housing assembly (5), and a piston chamber oil port extension pipe (43) and a pistonless chamber oil port extension pipe (44) are provided at the end of the hydraulic cylinder (38); a oil distribution and oil collecting block (45) is provided on one side of the housing assembly (5), two groups of oil circuits are provided in the oil distribution and oil collecting block (45), and three groups of quick connectors are provided outside the oil distribution and oil collecting block (45), and the quick connectors are used to connect the piston chamber oil port extension pipe (43), the pistonless chamber oil port extension pipe (44) and the hydraulic control system respectively.

7. The high-efficiency and environment-friendly rotating blowout preventer according to claim 4, characterized in that, the housing assembly (5) includes a base housing (46) with the cavity provided therein, an upper part of the base housing (46) is provided with a groove matched with the clamp (39), and fourth sealing grooves are provided on both sides of the groove.

8. The high-efficiency and environment-friendly rotating blowout preventer according to any one of claims 1 to 3, characterized in that, the coolant channel includes a coolant injection passage (20), a coolant return passage (29) symmetrically distributed with the coolant injection passage (20), and a coolant injection groove (31), the coolant injection passage (20) and the coolant return passage (29) are both provided in the lower outer cylinder (19), and the coolant injection groove (31) is provided on the outer wall of the lower outer cylinder (19); the oil injection channel includes two completely symmetrically distributed lubricating oil injection pipelines (30) and a lubricating oil injection groove (32), the lubricating oil injection pipelines (30) are provided in the lower outer cylinder (19), and the lubricating oil injection groove (32) is provided on the outer wall of the lower outer cylinder (19); an upper sealing assembly (17) is clamped between the top of the central pipe (13) and the lower outer cylinder (19), a coolant circulation chamber (28) is provided between the upper sealing assembly (17) and the lower outer cylinder (19), and a cooling chamber (49) is provided between the lower part of the lower outer cylinder (19) and the housing assembly (5); the injection holes include a coolant return hole (A), a coolant injection hole (C), a first oil injection hole (B) and a second oil injection hole (D), the coolant is injected into the coolant injection groove (31) through the coolant injection hole (C), enters the coolant circulation chamber (28) along the coolant injection passage (20), then enters the cooling chamber (49) along the coolant return passage (29), and finally flows to the coolant return hole (A); the lubricating oil is injected into the lubricating oil injection groove (32) through the first oil injection hole (B) or the second oil injection hole (D), and enters the bearing chamber of the rotary control head (3) along the lubricating oil injection pipeline (30).

9. The high-efficiency and environmentally friendly rotating blowout preventer according to claim 8, characterized in that, a first sealing inclined surface (47) at a first included angle with the central axis and a second sealing inclined surface (48) at a second included angle with the central axis are provided inside the base housing (46), and the first sealing inclined surface (47) and the second sealing inclined surface (48) are respectively in mating contact with corresponding positions of the rotary control head (3).

10. The high-efficiency and environmentally friendly rotating blowout preventer according to claim 8, characterized in that, a grease filling groove (15) and a Y-shaped sealing ring (27) are provided inside the upper sealing assembly (17).

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