Overflow slurry recycling device

Abstract

The overflow slurry recycling device comprises a slurry storage cylinder, the slurry storage cylinder is arranged on the outer side of an inner cylinder of an expansion joint in a sleeving mode, a slurry discharging opening is formed in the bottom of the slurry storage cylinder and connected with an inlet of a first pneumatic diaphragm pump, and an outlet of the first pneumatic diaphragm pump is connected with an inlet of a two-position three-way reversing valve; an outlet of the two-position three-way reversing valve is connected with an inlet of the slurry filter and an inlet of the moon pool water tank, an outlet of the slurry filter is connected with the slurry storage cylinder, an outlet of the moon pool water tank is connected with the second pneumatic diaphragm pump, and the first pneumatic diaphragm pump and the second pneumatic diaphragm pump are both connected with the air source control assembly in a pipeline connection mode. According to the device, the slurry storage cylinder, the first pneumatic diaphragm pump, the two-position three-way reversing valve, the moon pool water tank and the second pneumatic diaphragm pump jointly form a slurry return channel, slurry is recycled into a platform slurry treatment device, and the problem of environmental pollution caused by slurry leakage is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of drilling equipment and relates to an overflow mud circulation recovery device. Background Art

[0002] The TTR riser system is a channel connecting the platform and the underwater wellhead in the offshore drilling project. This channel is a flexible channel for drilling tools to be lowered and mud to be returned. In the TTR riser system, the expansion joint relies on the relative reciprocating motion of the inner and outer tubes to achieve the motion compensation between the MODU and the riser, and the pressure sealing of the annular mud is achieved through the sealing rubber tube. When the lateral movement of the MODU is large, or the driving pressure of the expansion joint sealing rubber tube is set unreasonably, the mud in the wellbore annulus may be partially lost; at the same time, if the sealing rubber tube is excessively worn and not replaced in time, the mud may also gush out intermittently with the reciprocating motion of the expansion joint.

[0003] The leakage of mud in the sealing part of the expansion joint of the riser, whether it is a small leakage or a large-scale gushing caused by the failure of the sealing rubber tube, the lost mud will cause pollution to the local marine environment. At the same time, if the leakage is too large, the mud, as a consumable, will also cause economic losses. Summary of the invention

[0004] The purpose of the present invention is to provide an overflow mud circulation recovery device to solve the problem of mud leakage in the sealing part of the expansion joint of the watertight pipe existing in the prior art, causing environmental pollution.

[0005] The technical solution adopted by the present invention is that the overflow mud circulation recovery device includes a mud storage cylinder, which is sleeved on the outside of the inner cylinder of the telescopic joint. A mud discharge outlet is arranged at the bottom of the mud storage cylinder, and the mud discharge outlet is connected to the inlet of the first pneumatic diaphragm pump, and the outlet of the first pneumatic diaphragm pump is connected to the inlet of the two-position three-way reversing valve, and the outlet of the two-position three-way reversing valve is respectively connected to the inlets of the mud filter and the moon pool water tank, the outlet of the mud filter is connected to the mud storage cylinder, and the outlet of the moon pool water tank is connected to the second pneumatic diaphragm pump, and the first pneumatic diaphragm pump and the second pneumatic diaphragm pump are both connected to the air source control assembly, and the connection method is pipeline connection.

[0006] The present invention is also characterized in that:

[0007] A stirring device is arranged inside the moon pool water tank, a liquid level sensor is arranged on the inner wall of the moon pool water tank, and the second pneumatic diaphragm pump, the stirring device and the liquid level sensor are all electrically connected to the sensor assembly.

[0008] A water injection port is arranged at the top of the mud storage cylinder, a water injection control valve is arranged at the water injection port on the inner wall of the mud storage cylinder, a water injection pipeline is connected to the water injection port on the outer wall of the mud storage cylinder, a liquid level display is embedded on the outer wall of the mud storage cylinder, a high liquid level mark is arranged at the top of the liquid level display, and a low liquid level mark is arranged at the bottom of the liquid level display.

[0009] The water injection control valve includes a support plate, which is fixed to the inner wall of the storage cylinder by bolts. A through hole corresponding to the water injection port is opened on the support plate, and the through hole is opened in a direction perpendicular to the inner wall of the storage cylinder. A follower rod is passed through the through hole, and a soft plug for blocking the water injection port is arranged at one end of the follower rod, and the other end of the follower rod abuts against one end of the driving rod. A rotating shaft for rotating the driving rod up and down is arranged on the support plate, and a circular lever is fixedly connected to the other end of the driving rod. The driving rod is arranged along the diameter direction of the circular lever, and the circular lever is located between the mud storage cylinder and the inner cylinder of the telescopic joint. The circular lever is sleeved on the outside of the inner cylinder of the telescopic joint, and a floating ball is connected to the circular lever.

[0010] A hydraulic sensor outlet is also provided on the inner wall of the mud storage cylinder, which is connected to a booster device, a hydraulic three-way connector and a two-position three-way reversing valve in sequence through pipelines. The booster device is also connected to the inlet of the first pneumatic diaphragm pump, and the hydraulic three-way connector is also connected to the air source control assembly.

[0011] A first power gas control valve is arranged on the pipeline between the air source control assembly and the first pneumatic diaphragm pump, a second power gas control valve is arranged on the pipeline between the air source control assembly and the second pneumatic diaphragm pump, a control gas control valve is arranged on the pipeline between the air source control assembly and the hydraulic three-way connector, and a gas-liquid converter is also arranged on the pipeline between the control gas control valve and the hydraulic three-way connector.

[0012] The boosting device is composed of several pressure amplifiers connected in series. The inlet of the boosting device is connected to the hydraulic sensor outlet. The outlet of the boosting device includes a drive liquid outlet and an overflow mud outlet. The drive liquid outlet is connected to the inlet of the hydraulic three-way connector, and the overflow mud outlet is connected to the inlet of the first pneumatic diaphragm pump.

[0013] The inlet of the hydraulic three-way connector includes a control liquid injection port and a control gas injection port. The control liquid injection port is connected to the drive liquid outlet, the control gas injection port is connected to the air source control assembly, and the outlet of the hydraulic three-way connector is connected to the inlet of the two-position three-way reversing valve.

[0014] The inlet of the two-position three-way reversing valve includes a control liquid inlet and a mud injection port, the control liquid inlet is connected to the outlet of the hydraulic three-way connector, the mud injection port is connected to the outlet of the first pneumatic diaphragm pump, the outlets connected to the two-position three-way reversing valve include a mud circulation outlet and a mud return outlet, the mud circulation outlet is connected to the inlet of the mud filter, the mud return outlet is connected to the inlet of the moon pool water tank, and a resettable spring is arranged in the two-position three-way reversing valve.

[0015] The beneficial effects of the present invention are:

[0016] The mud of the present invention is recovered to the platform mud processing device through a mud storage cylinder, a first pneumatic diaphragm pump, a two-position three-way reversing valve, a moon pool water tank, and a second pneumatic diaphragm pump to form a mud return passage, thereby solving the problems of environmental pollution and resource waste caused by mud leakage. At the same time, the device also sets a water injection port and a water injection control valve on the top of the mud storage cylinder, which can effectively prevent the first pneumatic diaphragm pump from drying out due to excessive mud recovery and the accelerated wear of the sealing cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the overflow mud circulation recovery device of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the mud storage cylinder and the booster device in the overflow mud circulation recovery device of the present invention;

[0019] Figure 3 It is a structural schematic diagram of a liquid level display in an overflow mud circulation recovery device of the present invention;

[0020] Figure 4-Figure 6 It is a structural schematic diagram of a control valve in the overflow mud circulation recovery device of the present invention.

[0021] In the figure, 1. Mud storage cylinder, 101. Water injection port;

[0022] 102. control valve, 1021. support plate, 1022. through hole, 1023. driven rod, 1024. soft plug, 1025. driving rod, 1026. rotating shaft, 1027. circular lever, 1028. floating ball;

[0023] 103. Water injection pipeline, 104. Liquid level display, 105. High liquid level mark, 106. Low liquid level mark, 107. Hydraulic sensor outlet, 108. Mud discharge outlet;

[0024] 2. A first pneumatic diaphragm pump, 3. A second pneumatic diaphragm pump;

[0025] 4. Two-position three-way reversing valve, 401. Control fluid inlet, 402. Mud injection inlet, 403. Mud circulation outlet, 404. Mud return outlet, 405. Spring;

[0026] 5. Booster, 501. Driving fluid outlet, 502. Overflow mud outlet;

[0027] 6. Moon pool water tank, 601. Stirring device, 602. Liquid level sensor;

[0028] 7. Hydraulic three-way connector, 701. Control liquid injection port, 702. Control gas injection port;

[0029] 8. Mud filter, 9. Air source control assembly, 10. Sensor assembly, 11. First power air control valve, 12. Second power air control valve, 13. Control air control valve, 14. Air-to-liquid converter, 15. Pressure amplifier. DETAILED DESCRIPTION

[0030] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] The overflow mud circulation recovery device of the present invention is as follows: Figure 1 As shown, it includes a mud storage cylinder 1, which is sleeved on the outside of the inner cylinder of the telescopic joint. A mud discharge port 108 is provided at the bottom of the mud storage cylinder 1. The mud discharge port 108 is connected to the inlet of the first pneumatic diaphragm pump 2. The outlet of the first pneumatic diaphragm pump 2 is connected to the inlet of the two-position three-way reversing valve 4. The outlet of the two-position three-way reversing valve 4 is respectively connected to the inlets of the mud filter 8 and the moon pool water tank 6. The outlet of the mud filter 8 is connected to the mud storage cylinder 1, and the outlet of the moon pool water tank 6 is connected to the second pneumatic diaphragm pump 3. The first pneumatic diaphragm pump 2 and the second pneumatic diaphragm pump 3 are both connected to the air source control assembly 9. The connection is pipeline connection, wherein the mud storage cylinder 1, the first pneumatic diaphragm pump 2, the two-position three-way reversing valve 4, and the mud filter 8 together constitute a mud reflux path, through which cooling water can be recycled to save cooling water resources, and at the same time, the mud storage cylinder 1, the first pneumatic diaphragm pump 2, the two-position three-way reversing valve 4, the moon pool water tank 6, and the second pneumatic diaphragm pump 3 together constitute a mud return path, through which the mud is recovered to the platform mud processing device, thereby solving the problems of environmental pollution caused by mud leakage and waste of mud resources.

[0032] A stirring device 601 is provided inside the moon pool water tank 6. The stirring effect of the stirring device can effectively prevent the mud from depositing at the bottom of the moon pool water tank 6. A liquid level sensor 602 is provided on the inner wall of the moon pool water tank 6. The sensor 602 can detect the mud water level in the moon pool water tank 6 and feed it back to the sensor assembly 10. The second pneumatic diaphragm pump 3, the stirring device 601, and the liquid level sensor 602 are all electrically connected to the sensor assembly 10. The sensor assembly 10 can control the stirring device 601 to operate at a fixed time. At the same time, through the return data of the liquid level sensor 602, the second pneumatic diaphragm pump 3 is controlled to discharge the mud in the moon pool water tank 6, and finally discharge it into the platform mud processing device.

[0033] A hydraulic sensor outlet 107 is also provided on the inner wall of the mud storage cylinder 1. The hydraulic sensor outlet 107 is connected to the booster device 5, the hydraulic three-way connector 7 and the two-position three-way reversing valve 4 in sequence through pipelines. The booster device 5 is also connected to the inlet of the first pneumatic diaphragm pump 2. The hydraulic three-way connector 7 is also connected to the air source control assembly 9. The booster device 5 drives and resets the two-position three-way reversing valve 4 through its own hydraulic pressure difference. The hydraulic three-way connector 7 cooperates with the air source control assembly 9 to provide auxiliary power for the reversing of the two-position three-way reversing valve 4.

[0034] A first power gas control valve 11 is arranged on the pipeline between the air source control assembly 9 and the first pneumatic diaphragm pump 2, a second power gas control valve 12 is arranged on the pipeline between the air source control assembly 9 and the second pneumatic diaphragm pump 3, a control gas control valve 13 is arranged on the pipeline between the air source control assembly 9 and the hydraulic three-way connector 7, and a gas-liquid converter 14 is also arranged on the pipeline between the control gas control valve 13 and the hydraulic three-way connector 7, wherein the air source control assembly 9 provides power gas for the first pneumatic diaphragm pump 2 and the second pneumatic diaphragm pump 3, and the air source control assembly 9 provides control gas to the two-position three-way reversing valve 4 through the hydraulic three-way connector 7, which is converted into a hydraulic signal input through the gas-liquid converter 14, thereby realizing the reversing action of the two-position three-way reversing valve 4.

[0035] The booster device 5, such as Figure 2 As shown, the boosting device 5 is composed of a plurality of pressure amplifiers 15 connected in series, the inlet of the boosting device 5 is connected to the hydraulic sensor outlet 107, the outlet of the boosting device 5 includes a driving liquid outlet 501 and an overflow mud outlet 502, the driving liquid outlet 501 is connected to the inlet of the hydraulic three-way connector 7, and the overflow mud outlet 502 is connected to the inlet of the first pneumatic diaphragm pump 2, wherein a bypass line is provided by connecting the overflow mud outlet 502 to the inlet of the first pneumatic diaphragm pump 2, the speed of the mud flowing to the first pneumatic diaphragm pump 2 can be limited, the liquid level in the mud storage cylinder 1 can be slowly lowered, and the pressure can be stabilized.

[0036] The inlet of the hydraulic three-way connector 7 includes a control liquid injection port 701 and a control gas injection port 702. The control liquid injection port 701 is connected to the drive liquid outlet 501, and the control gas injection port 702 is connected to the gas source control assembly 9. The outlet of the hydraulic three-way connector 7 is connected to the inlet of the two-position three-way reversing valve 4.

[0037] The inlet of the two-position three-way reversing valve 4 includes a control liquid inlet 401 and a mud injection port 402. The control liquid inlet 401 is connected to the outlet of the hydraulic three-way connector 7, and the mud injection port 402 is connected to the outlet of the first pneumatic diaphragm pump 2. When the liquid level in the mud storage cylinder 1 reaches the hydraulic sensor outlet 107, the mud overflows into the boosting device 5, and the two-position three-way reversing valve 4 opens. At this time, the medium injected into the mud injection port 402 is overflow mud, and the driving liquid of the control liquid inlet 401 can be water-based hydraulic oil, etc. The outlets connected to the two-position three-way reversing valve 4 include a mud circulation outlet 403 and a mud return outlet 404. The mud circulation outlet 403 is connected to the inlet of the mud filter 8, and the mud return outlet 404 is connected to the inlet of the moon pool water tank 6. A resettable spring 405 is arranged in the two-position three-way reversing valve 4. The two-position three-way reversing valve 4 is hydraulically driven and reset by the spring 405. Specifically, when the reset force of the spring 405 is greater than the control hydraulic pressure, the two-position three-way reversing valve 4 is reset.

[0038] A liquid level indicator 104 is embedded on the outer wall of the mud storage cylinder 1. The liquid level indicator 104 is made of a transparent material, such as Figure 3 As shown, a high liquid level mark 105 is provided on the top of the liquid level display 104 , and a low liquid level mark 106 is provided on the bottom of the liquid level display 104 . The liquid level and cleanliness of the mud in the barrel can be clearly observed through the liquid level display 104 .

[0039] A water injection port 101 is provided at the top of the mud storage cylinder 1. Figure 4 As shown, a water injection control valve 102 is provided at the water injection port 101 located on the inner wall of the mud storage barrel 1, and a water injection pipeline 103 is connected to the water injection port 101 located on the outer wall of the mud storage barrel 1. Cooling water can be injected into the mud storage barrel 1 through the water injection port 101, so as to avoid excessive mud recovery and mud being drained out of the mud storage barrel 1 due to a failure such as response delay of the return spring 405 of the two-position three-way reversing valve 4, thereby causing the sealing barrel to wear faster or the first pneumatic diaphragm pump 2 to dry out.

[0040] Water injection control valve 102, such as Figure 5 and Figure 6As shown, the water injection control valve 102 includes a support plate 1021, which is fixed to the inner wall of the storage cylinder by bolts. A through hole 1022 corresponding to the water injection port 101 is opened on the support plate 1021, and the through hole 1022 is opened in a direction perpendicular to the inner wall of the storage cylinder. A driven rod 1023 is inserted into the through hole 1022. A soft plug 1024 that can block the water injection port 101 is arranged at one end of the driven rod 1023, and the other end of the driven rod 1023 abuts against one end of a driving rod 1025. A rotating shaft 1026 that can make the driving rod 1025 rotate up and down is arranged on the support plate 1021. The other end of the driving rod 1025 The end of the slurry storage tube 1 is fixedly connected with a circular lever 1027, and the driving rod 1025 is arranged along the diameter direction of the circular lever 1027. The circular lever 1027 is located between the mud storage tube 1 and the inner tube of the telescopic joint, and the circular lever 1027 is sleeved on the outer side of the inner tube of the telescopic joint. The circular lever 1027 is connected with a floating ball 1028. When the liquid level drops, the circular lever 1027 rotates around the rotating shaft 1026 under the action of gravity, releasing the driven rod 1023 to move away from the water injection port 101, and the soft plug 1024 is opened under the action of the water pressure in the water injection port 101, and water is injected into the temporary mud storage tube 1. When the liquid level rises, the circular lever 1027 is lifted up under the traction of the floating ball, and the driving rod 1025 squeezes the driven rod 1023 to move in the direction close to the water injection port 101, thereby squeezing the soft plug 1024 and closing the water injection passage of the platform.

[0041] The overflow mud circulation recovery device of the present invention has the following working principle:

[0042] Observe the liquid level display 104. When the liquid level of the mud in the mud storage cylinder 1 is between the low liquid level mark 106 and the high liquid level mark 105, the air source control assembly 9 provides power gas to the first pneumatic diaphragm pump 2, and the mud is discharged through the mud discharge port 108, and returns through the first pneumatic diaphragm pump 2, the two-position three-way reversing valve 4, and the mud filter 8 to realize mud circulation.

[0043] When the liquid level of the mud in the mud storage cylinder 1 is higher than the position of the high liquid level mark 105 and continues to rise to the hydraulic sensor outlet 107, the mud flows into the boosting device 5 from the hydraulic sensor outlet 107 to form a hydraulic pressure difference. The amplified hydraulic pressure difference assists the two-position three-way reversing valve 4 to achieve the reversing action, so that the mud is discharged through the mud discharge port 108, passes through the first pneumatic diaphragm pump 2 and the two-position three-way reversing valve 4, and enters the moon pool water tank 6. When the liquid level in the moon pool water tank 6 reaches the position of the liquid level sensor 602, the sensor assembly 10 drives the stirring device 601 and the second pneumatic diaphragm pump 3, and at the same time controls the air source control assembly 9 to provide power gas to the second pneumatic diaphragm pump 12, and the mud is discharged to the platform mud processing device through the second pneumatic diaphragm pump 12.

[0044] When the two-position three-way directional valve 4 realizes the switching action due to the failure of the boosting device 5, the air source control assembly 9 provides control air to the two-position three-way directional valve 4 through the hydraulic three-way connector 7, which is converted into hydraulic signal input through the air-liquid converter 14, thereby realizing the switching action of the two-position three-way directional valve 4.

[0045] When the liquid level of the mud in the mud storage barrel 1 is lower than the position of the low liquid level mark 106 , the control valve 102 is opened, and the platform cooling water is injected into the mud storage barrel 1 through the water injection pipeline 103 .

[0046] The overflow mud circulation recovery device of the present invention has the following specific embodiments:

[0047] Example 1

[0048] The overflow mud circulation recovery device includes a mud storage cylinder 1, which is sleeved on the outside of the inner cylinder of the telescopic joint. A mud discharge port 108 is arranged at the bottom of the mud storage cylinder 1. The mud discharge port 108 is connected to the inlet of the first pneumatic diaphragm pump 2, and the outlet of the first pneumatic diaphragm pump 2 is connected to the inlet of the two-position three-way reversing valve 4. The outlet of the two-position three-way reversing valve 4 is respectively connected to the inlets of the mud filter 8 and the moon pool water tank 6, the outlet of the mud filter 8 is connected to the mud storage cylinder 1, and the outlet of the moon pool water tank 6 is connected to the second pneumatic diaphragm pump 3. The first pneumatic diaphragm pump 2 and the second pneumatic diaphragm pump 3 are both connected to the air source control assembly 9, and the connection method is pipeline connection.

[0049] A stirring device 601 is provided inside the moon pool water tank 6 , and a liquid level sensor 602 is provided on the inner wall of the moon pool water tank 6 . The second pneumatic diaphragm pump 3 , the stirring device 601 , and the liquid level sensor 602 are all electrically connected to the sensor assembly 10 .

[0050] Example 2

[0051] The overflow mud circulation recovery device includes a mud storage cylinder 1, which is sleeved on the outside of the inner cylinder of the telescopic joint. A mud discharge port 108 is arranged at the bottom of the mud storage cylinder 1. The mud discharge port 108 is connected to the inlet of the first pneumatic diaphragm pump 2, and the outlet of the first pneumatic diaphragm pump 2 is connected to the inlet of the two-position three-way reversing valve 4. The outlet of the two-position three-way reversing valve 4 is respectively connected to the inlets of the mud filter 8 and the moon pool water tank 6, the outlet of the mud filter 8 is connected to the mud storage cylinder 1, and the outlet of the moon pool water tank 6 is connected to the second pneumatic diaphragm pump 3. The first pneumatic diaphragm pump 2 and the second pneumatic diaphragm pump 3 are both connected to the air source control assembly 9, and the connection method is pipeline connection.

[0052] A stirring device 601 is provided inside the moon pool water tank 6 , and a liquid level sensor 602 is provided on the inner wall of the moon pool water tank 6 . The second pneumatic diaphragm pump 3 , the stirring device 601 , and the liquid level sensor 602 are all electrically connected to the sensor assembly 10 .

[0053] A water injection port 101 is arranged at the top of the mud storage barrel 1, a water injection control valve 102 is arranged at the water injection port 101 located on the inner wall of the mud storage barrel 1, a water injection pipeline 103 is connected to the water injection port 101 located on the outer wall of the mud storage barrel 1, a liquid level display 104 is embedded on the outer wall of the mud storage barrel 1, a high liquid level mark 105 is arranged at the top of the liquid level display 104, and a low liquid level mark 106 is arranged at the bottom of the liquid level display 104.

[0054] The water injection control valve 102 includes a support plate 1021, which is fixed to the inner wall of the storage tube by bolts. A through hole 1022 corresponding to the water injection port 101 is opened on the support plate 1021. The through hole 1022 is opened in a direction perpendicular to the inner wall of the storage tube. A driven rod 1023 is inserted into the through hole 1022. A soft plug 1024 that can block the water injection port 101 is arranged at one end of the driven rod 1023. The other end of the driven rod 1023 is connected to the driving rod 1025. One end of the driving rod 1025 abuts against the supporting plate 1021, and a rotating shaft 1026 is provided on the supporting plate 1021, and a circular lever 1027 is fixedly connected to the other end of the driving rod 1025. The driving rod 1025 is arranged along the diameter direction of the circular lever 1027. The circular lever 1027 is located between the mud storage cylinder 1 and the inner cylinder of the telescopic joint. The circular lever 1027 is sleeved on the outside of the inner cylinder of the telescopic joint, and a float 1028 is connected to the circular lever 1027.

[0055] Example 3

[0056] The overflow mud circulation recovery device includes a mud storage cylinder 1, which is sleeved on the outside of the inner cylinder of the telescopic joint. A mud discharge port 108 is arranged at the bottom of the mud storage cylinder 1. The mud discharge port 108 is connected to the inlet of the first pneumatic diaphragm pump 2, and the outlet of the first pneumatic diaphragm pump 2 is connected to the inlet of the two-position three-way reversing valve 4. The outlet of the two-position three-way reversing valve 4 is respectively connected to the inlets of the mud filter 8 and the moon pool water tank 6, the outlet of the mud filter 8 is connected to the mud storage cylinder 1, and the outlet of the moon pool water tank 6 is connected to the second pneumatic diaphragm pump 3. The first pneumatic diaphragm pump 2 and the second pneumatic diaphragm pump 3 are both connected to the air source control assembly 9, and the connection method is pipeline connection.

[0057] A stirring device 601 is provided inside the moon pool water tank 6 , and a liquid level sensor 602 is provided on the inner wall of the moon pool water tank 6 . The second pneumatic diaphragm pump 3 , the stirring device 601 , and the liquid level sensor 602 are all electrically connected to the sensor assembly 10 .

[0058] A water injection port 101 is arranged at the top of the mud storage barrel 1, a water injection control valve 102 is arranged at the water injection port 101 located on the inner wall of the mud storage barrel 1, a water injection pipeline 103 is connected to the water injection port 101 located on the outer wall of the mud storage barrel 1, a liquid level display 104 is embedded on the outer wall of the mud storage barrel 1, a high liquid level mark 105 is arranged at the top of the liquid level display 104, and a low liquid level mark 106 is arranged at the bottom of the liquid level display 104.

[0059] The water injection control valve 102 includes a support plate 1021, which is fixed to the inner wall of the storage tube by bolts. A through hole 1022 corresponding to the water injection port 101 is opened on the support plate 1021. The through hole 1022 is opened in a direction perpendicular to the inner wall of the storage tube. A driven rod 1023 is inserted into the through hole 1022. A soft plug 1024 that can block the water injection port 101 is arranged at one end of the driven rod 1023. The other end of the driven rod 1023 is connected to the driving rod 1025. One end of the driving rod 1025 abuts against the supporting plate 1021, and a rotating shaft 1026 is provided on the supporting plate 1021, and a circular lever 1027 is fixedly connected to the other end of the driving rod 1025. The driving rod 1025 is arranged along the diameter direction of the circular lever 1027. The circular lever 1027 is located between the mud storage cylinder 1 and the inner cylinder of the telescopic joint. The circular lever 1027 is sleeved on the outside of the inner cylinder of the telescopic joint, and a float 1028 is connected to the circular lever 1027.

[0060] A hydraulic sensor outlet 107 is also provided on the inner wall of the mud storage cylinder 1, and the hydraulic sensor outlet 107 is connected to the boosting device 5, the hydraulic three-way connector 7 and the two-position three-way reversing valve 4 in sequence through pipelines. The boosting device 5 is also connected to the inlet of the first pneumatic diaphragm pump 2, and the hydraulic three-way connector 7 is also connected to the air source control assembly 9.

[0061] A first power gas control valve 11 is arranged on the pipeline between the air source control assembly 9 and the first pneumatic diaphragm pump 2, a second power gas control valve 12 is arranged on the pipeline between the air source control assembly 9 and the second pneumatic diaphragm pump 3, a control gas control valve 13 is arranged on the pipeline between the air source control assembly 9 and the hydraulic three-way connector 7, and a gas-liquid converter 14 is also arranged on the pipeline between the control gas control valve 13 and the hydraulic three-way connector 7.

[0062] The boosting device 5 is composed of several pressure amplifiers 15 connected in series. The inlet of the boosting device 5 is connected to the hydraulic sensor outlet 107. The outlet of the boosting device 5 includes a drive liquid outlet 501 and an overflow mud outlet 502. The drive liquid outlet 501 is connected to the inlet of the hydraulic three-way connector 7, and the overflow mud outlet 502 is connected to the inlet of the first pneumatic diaphragm pump 2.

[0063] The inlet of the hydraulic three-way connector 7 includes a control liquid injection port 701 and a control gas injection port 702. The control liquid injection port 701 is connected to the drive liquid outlet 501, and the control gas injection port 702 is connected to the gas source control assembly 9. The outlet of the hydraulic three-way connector 7 is connected to the inlet of the two-position three-way reversing valve 4.

[0064] The inlet of the two-position three-way reversing valve 4 includes a control liquid inlet 401 and a mud injection port 402. The control liquid inlet 401 is connected to the outlet of the hydraulic three-way connector 7, and the mud injection port 402 is connected to the outlet of the first pneumatic diaphragm pump 2. The outlets connected to the two-position three-way reversing valve 4 include a mud circulation outlet 403 and a mud return outlet 404. The mud circulation outlet 403 is connected to the inlet of the mud filter 8, and the mud return outlet 404 is connected to the inlet of the moon pool water tank 6. A resettable spring 405 is arranged in the two-position three-way reversing valve 4.

Claims

1. Overflow mud circulation recovery device, characterized in that: The invention comprises a mud storage cylinder (1), wherein the mud storage cylinder (1) is sleeved on the outside of the inner cylinder of the telescopic joint, and a mud discharge port (108) is arranged at the bottom of the mud storage cylinder (1), and the mud discharge port (108) is connected to the inlet of a first pneumatic diaphragm pump (2), and the outlet of the first pneumatic diaphragm pump (2) is connected to the inlet of a two-position three-way reversing valve (4), and the outlet of the two-position three-way reversing valve (4) is respectively connected to the inlets of a mud filter (8) and a moon pool water tank (6), and the outlet of the mud filter (8) is connected to the mud storage cylinder (1), and the outlet of the moon pool water tank (6) is connected to the second pneumatic diaphragm pump (3), and the first pneumatic diaphragm pump (2) and the second pneumatic diaphragm pump (3) are both connected to an air source control assembly (9), and the connection methods are all pipeline connections.

2. The overflow mud circulation recovery device according to claim 1 is characterized in that: A stirring device (601) is arranged inside the moon pool water tank (6), a liquid level sensor (602) is arranged on the inner wall of the moon pool water tank (6), and the second pneumatic diaphragm pump (3), the stirring device (601), and the liquid level sensor (602) are all electrically connected to the sensor assembly (10).

3. The overflow mud circulation recovery device according to claim 1 is characterized in that: A water injection port (101) is arranged at the top of the mud storage barrel (1), a water injection control valve (102) is arranged at the water injection port (101) located on the inner wall of the mud storage barrel (1), a water injection pipeline (103) is connected to the water injection port (101) located on the outer wall of the mud storage barrel (1), a liquid level display (104) is embedded on the outer wall of the mud storage barrel (1), a high liquid level mark (105) is arranged at the top of the liquid level display (104), and a low liquid level mark (106) is arranged at the bottom of the liquid level display (104).

4. The overflow mud circulation recovery device according to claim 3 is characterized in that: The water injection control valve (102) comprises a support plate (1021), wherein the support plate (1021) is fixed to the inner wall of the storage tube by bolts, and a through hole (1022) corresponding to the water injection port (101) is formed on the support plate (1021), and the through hole (1022) is formed in a direction perpendicular to the inner wall of the storage tube, and a driven rod (1023) is passed through the through hole (1022), and a soft plug (1024) capable of plugging the water injection port (101) is provided at one end of the driven rod (1023), and the other end of the driven rod (1023) is connected to the driving rod (101). The support plate (1021) is provided with a rotating shaft (1026) which enables the driving rod (1025) to rotate up and down. The other end of the driving rod (1025) is fixedly connected with a circular lever (1027). The driving rod (1025) is arranged along the diameter direction of the circular lever (1027). The circular lever (1027) is located between the mud storage cylinder (1) and the telescopic joint inner cylinder. The circular lever (1027) is sleeved on the outer side of the telescopic joint inner cylinder. The circular lever (1027) is connected with a floating ball (1028).

5. The overflow mud circulation recovery device according to claim 1 is characterized in that: The inner wall of the mud storage cylinder (1) is also provided with a hydraulic sensor outlet (107), and the hydraulic sensor outlet (107) is connected to a booster device (5), a hydraulic three-way connector (7) and a two-position three-way reversing valve (4) in sequence through pipelines. The booster device (5) is also connected to the inlet of the first pneumatic diaphragm pump (2), and the hydraulic three-way connector (7) is also connected to the air source control assembly (9).

6. The overflow mud circulation recovery device according to claim 5, characterized in that: A first power gas control valve (11) is arranged on the pipeline between the gas source control assembly (9) and the first pneumatic diaphragm pump (2), a second power gas control valve (12) is arranged on the pipeline between the gas source control assembly (9) and the second pneumatic diaphragm pump (3), a control gas control valve (13) is arranged on the pipeline between the gas source control assembly (9) and the hydraulic three-way connector (7), and a gas-liquid converter (14) is also arranged on the pipeline between the control gas control valve (13) and the hydraulic three-way connector (7).

7. The overflow mud circulation recovery device according to claim 5, characterized in that: The boosting device (5) is composed of a plurality of pressure amplifiers (15) connected in series. The inlet of the boosting device (5) is connected to the hydraulic sensor outlet (107). The outlet of the boosting device (5) includes a drive liquid outlet (501) and an overflow mud outlet (502). The drive liquid outlet (501) is connected to the inlet of a hydraulic three-way connector (7), and the overflow mud outlet (502) is connected to the inlet of a first pneumatic diaphragm pump (2).

8. The overflow mud circulation recovery device according to claim 7, characterized in that: The inlet of the hydraulic three-way connector (7) comprises a control liquid injection port (701) and a control gas injection port (702); the control liquid injection port (701) is connected to the drive liquid outlet (501); the control gas injection port (702) is connected to the gas source control assembly (9); and the outlet of the hydraulic three-way connector (7) is connected to the inlet of the two-position three-way reversing valve (4).

9. The overflow mud circulation recovery device according to claim 8, characterized in that: The inlet of the two-position three-way reversing valve (4) comprises a control liquid inlet (401) and a mud injection port (402); the control liquid inlet (401) is connected to the outlet of the hydraulic three-way connector (7); the mud injection port (402) is connected to the outlet of the first pneumatic diaphragm pump (2); the outlets connected to the two-position three-way reversing valve (4) comprise a mud circulation outlet (403) and a mud return outlet (404); the mud circulation outlet (403) is connected to the inlet of the mud filter (8); the mud return outlet (404) is connected to the inlet of the moon pool water tank (6); and a resettable spring (405) is arranged inside the two-position three-way reversing valve (4).

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