CA3050787C - Passive deep-ocean heave compensation device for ocean platform drilling - Google Patents
Passive deep-ocean heave compensation device for ocean platform drilling Download PDFInfo
- Publication number
- CA3050787C CA3050787C CA3050787A CA3050787A CA3050787C CA 3050787 C CA3050787 C CA 3050787C CA 3050787 A CA3050787 A CA 3050787A CA 3050787 A CA3050787 A CA 3050787A CA 3050787 C CA3050787 C CA 3050787C
- Authority
- CA
- Canada
- Prior art keywords
- drilling
- floating
- compensation device
- motor
- coiling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Earth Drilling (AREA)
Abstract
A passive deep-sea heave compensation device for ocean platform drilling is disclosed. A
vertical guiding groove is formed inside a drilling derrick; a vertical spring is fixedly arranged on the top of the guiding groove; a pressure plate located in the guiding groove is fixedly arranged on the bottom of the spring; a floating crown block is located below the pressure plate; a central sheave whose cylindrical surface is provided with a plurality of trunkings is rotatably mounted in the floating crown block. The heave compensation device further comprises a hook, a riser, a large hook lifting rope, a steel wire rope and a displacement compensation mechanism I and a right displacement compensation mechanism II which are arranged on the left side and the right side of a stand respectively. The displacement compensation mechanism I and the right displacement compensation displacement mechanism II are arranged in a left-right symmetrical manner.
vertical guiding groove is formed inside a drilling derrick; a vertical spring is fixedly arranged on the top of the guiding groove; a pressure plate located in the guiding groove is fixedly arranged on the bottom of the spring; a floating crown block is located below the pressure plate; a central sheave whose cylindrical surface is provided with a plurality of trunkings is rotatably mounted in the floating crown block. The heave compensation device further comprises a hook, a riser, a large hook lifting rope, a steel wire rope and a displacement compensation mechanism I and a right displacement compensation mechanism II which are arranged on the left side and the right side of a stand respectively. The displacement compensation mechanism I and the right displacement compensation displacement mechanism II are arranged in a left-right symmetrical manner.
Description
PASSIVE DEEP-OCEAN HEAVE COMPENSATION DEVICE FOR
OCEAN PLATFORM DRILLING
TECHNICAL FIELD
The present invention relates to the technical field of heave compensation devices for ocean floating platforms, in particular to a passive dep-ocean heave compensation device for ocean platform drilling.
BACKGROUND
With the gradual depletion of terrestrial resources, the strategic vision of world economic development has gathered on the ocean, and the developments of marine technology and high-tech equipment are particularly important. In the petroleum field, with the rapid development of China's economy, especially the petrochemical and automobile industries as pillar industries, the contradiction of the shortage of petroleum supply and natural gas supply has become increasingly prominent. In view of the gradual depletion of onshore petroleum resources, it has become an inevitable trend to enter the deep sea. At present, the maximum working depth of an ocean petroleum rig has exceeded 3000m, and will continue to develop in a deeper direction. The requirements on all aspects of the rig are more demanding when the rig works under such water depth conditions. In order to adapt to some special situations faced in deep water conditions, many equipment needs to be redesigned and developed.
A drill string heave compensation device is one of the important equipment necessary to ensure the safety of ocean drilling vessels or semi-submersible drilling platforms and to improve working efficiency and quality. A semi-submersible drilling platform and a drilling pontoon used in deep-sea drilling will generate a periodic heave movement under the action of waves, and make the drill string reciprocate up and down, thereby causing changes in the downhole drilling pressure, even separating a drill bit from the bottom of the well, affecting the drilling efficiency, shortening the life of the drill bit and the drill string, causing operational safety hazards, and even leading to the inability to drill and forced shutdown, resulting in huge economic losses.
Therefore, in order to reduce the downtime and reduce the drilling cost, the floating drilling platform must take appropriate compensation measures for the drill string heave movement to ensure that the liquid level of a large hook used to suspend a riser in the seawater is unchanged, further to ensure that the positions of the drill string and the drill bit are unchanged.
Various forms of hydraulic heave compensation systems are most commonly used in marine floating drilling platforms, and can be, according to their power supply methods, divided into three forms: an active form, a passive form and a semi-active form. The active heave compensation system has better compensation effect and strong adaptability. However, due to the large mass and frequent reciprocating movements of the drill string, a large amount of energy may be consumed in the compensation process.
In addition, due to the existence of a large number of hydraulic components such as hydraulic lines and hydraulic control valves in a hydraulic drive system, the compensation system has a certain hysteresis to the compensation response of the drilling platform heave movements, to affect the compensation speed and the efficiency of a crown block heave compensation device. In the meantime, due to the existence of a large number of hydraulic components in the compensation system, leakage is likely to occur in the case of a large pressure of the hydraulic system, thereby affecting the safety and reliability of the compensation system. The accidents of the operation caused by the problems such as leakage of the hydraulic system or failure of the hydraulic valve line will cause the compensation system to be shut down for maintenance, thus increasing the difficulty in system maintenance and the overall operation cost.
The passive heave compensation system has been widely used because it does not require additional energy from the system during the compensation process, and the system is simple. However, because it is difficult to effectively suppress the influences of ultra-low frequency and wide-band random vibration on waves, currents and tides and the compensation accuracy is not high, passive heave compensation system the compensation precision of the passive compensation system is not ideal, and there is a certain hysteresis.
OCEAN PLATFORM DRILLING
TECHNICAL FIELD
The present invention relates to the technical field of heave compensation devices for ocean floating platforms, in particular to a passive dep-ocean heave compensation device for ocean platform drilling.
BACKGROUND
With the gradual depletion of terrestrial resources, the strategic vision of world economic development has gathered on the ocean, and the developments of marine technology and high-tech equipment are particularly important. In the petroleum field, with the rapid development of China's economy, especially the petrochemical and automobile industries as pillar industries, the contradiction of the shortage of petroleum supply and natural gas supply has become increasingly prominent. In view of the gradual depletion of onshore petroleum resources, it has become an inevitable trend to enter the deep sea. At present, the maximum working depth of an ocean petroleum rig has exceeded 3000m, and will continue to develop in a deeper direction. The requirements on all aspects of the rig are more demanding when the rig works under such water depth conditions. In order to adapt to some special situations faced in deep water conditions, many equipment needs to be redesigned and developed.
A drill string heave compensation device is one of the important equipment necessary to ensure the safety of ocean drilling vessels or semi-submersible drilling platforms and to improve working efficiency and quality. A semi-submersible drilling platform and a drilling pontoon used in deep-sea drilling will generate a periodic heave movement under the action of waves, and make the drill string reciprocate up and down, thereby causing changes in the downhole drilling pressure, even separating a drill bit from the bottom of the well, affecting the drilling efficiency, shortening the life of the drill bit and the drill string, causing operational safety hazards, and even leading to the inability to drill and forced shutdown, resulting in huge economic losses.
Therefore, in order to reduce the downtime and reduce the drilling cost, the floating drilling platform must take appropriate compensation measures for the drill string heave movement to ensure that the liquid level of a large hook used to suspend a riser in the seawater is unchanged, further to ensure that the positions of the drill string and the drill bit are unchanged.
Various forms of hydraulic heave compensation systems are most commonly used in marine floating drilling platforms, and can be, according to their power supply methods, divided into three forms: an active form, a passive form and a semi-active form. The active heave compensation system has better compensation effect and strong adaptability. However, due to the large mass and frequent reciprocating movements of the drill string, a large amount of energy may be consumed in the compensation process.
In addition, due to the existence of a large number of hydraulic components such as hydraulic lines and hydraulic control valves in a hydraulic drive system, the compensation system has a certain hysteresis to the compensation response of the drilling platform heave movements, to affect the compensation speed and the efficiency of a crown block heave compensation device. In the meantime, due to the existence of a large number of hydraulic components in the compensation system, leakage is likely to occur in the case of a large pressure of the hydraulic system, thereby affecting the safety and reliability of the compensation system. The accidents of the operation caused by the problems such as leakage of the hydraulic system or failure of the hydraulic valve line will cause the compensation system to be shut down for maintenance, thus increasing the difficulty in system maintenance and the overall operation cost.
The passive heave compensation system has been widely used because it does not require additional energy from the system during the compensation process, and the system is simple. However, because it is difficult to effectively suppress the influences of ultra-low frequency and wide-band random vibration on waves, currents and tides and the compensation accuracy is not high, passive heave compensation system the compensation precision of the passive compensation system is not ideal, and there is a certain hysteresis.
2 In addition, when a riser is lowered vertically from the drilling platform, the riser is tilted under the action of seawater. That is, the riser does not vertically descend, causing the drill string to tilt as well when the drill string is subsequently lowered in the riser, thereby further causing the drill bit connected to the drill string to be obliquely drill into the bottom layer of the sea bottom, and the drill bit is seriously damaged.
SUMMARY
TECHNICAL PROBLEM
An objective of the present invention is to overcome the defects of the prior art, and provide a passive deep-sea heave compensation device which has the advantages of simple structure, vertical lowering of a riser, good reliability, high compensation efficiency and high system response speed.
SOLUTION TO PROBLEMS
TECHNCIAL SOLUTION
The objective of the present invention is achieved by the following technical solution: a passive deep-sea heave compensation device for ocean platform drilling comprises a floating drilling platform, a stand arranged on the top of the floating drilling platform and a drilling derrick arranged on the top of the stand, wherein an earring screw and a drilling winch are arranged on the top of the floating drilling platform and located on the left side and the right side of the stand respectively; a vertical guiding groove is formed inside the drilling derrick; a vertical spring is fixedly arranged on the top of the guiding groove; a pressure plate which is located in the guiding groove is fixedly arranged on the bottom of the spring; a floating crown block is slidably mounted in the guiding groove and located right below the pressure plate; a central sheave whose cylindrical surface is provided with a plurality of trunkings are rotatably mounted in the floating crown block; the heave compensation device further comprises a large hook, a riser, a large hook lifting rope, a steel wire rope, as well as a displacement compensation mechanism I and a right displacement compensation mechanism II
which
SUMMARY
TECHNICAL PROBLEM
An objective of the present invention is to overcome the defects of the prior art, and provide a passive deep-sea heave compensation device which has the advantages of simple structure, vertical lowering of a riser, good reliability, high compensation efficiency and high system response speed.
SOLUTION TO PROBLEMS
TECHNCIAL SOLUTION
The objective of the present invention is achieved by the following technical solution: a passive deep-sea heave compensation device for ocean platform drilling comprises a floating drilling platform, a stand arranged on the top of the floating drilling platform and a drilling derrick arranged on the top of the stand, wherein an earring screw and a drilling winch are arranged on the top of the floating drilling platform and located on the left side and the right side of the stand respectively; a vertical guiding groove is formed inside the drilling derrick; a vertical spring is fixedly arranged on the top of the guiding groove; a pressure plate which is located in the guiding groove is fixedly arranged on the bottom of the spring; a floating crown block is slidably mounted in the guiding groove and located right below the pressure plate; a central sheave whose cylindrical surface is provided with a plurality of trunkings are rotatably mounted in the floating crown block; the heave compensation device further comprises a large hook, a riser, a large hook lifting rope, a steel wire rope, as well as a displacement compensation mechanism I and a right displacement compensation mechanism II
which
3 are arranged on the left side and the right side of a stand respectively;
the displacement compensation mechanism I comprises a first connecting rod, a second connecting rod, a guide wheel, and a hydraulic compensation cylinder, wherein the lower end of the first connecting rod is hinged to the top of the stand, and the other end of the first connecting rod is hinged to the middle part of the guide wheel; one end of the second connecting rod is hinged to the middle part of the guide wheel, and the other end of the second connecting rod is hinged to the middle part of the central sheave;
the hydraulic compensation cylinder is obliquely arranged to the right upwards; a cylinder barrel of the hydraulic compensation cylinder is hinged to the stand;
a piston rod of the hydraulic compensation cylinder is hinged to the bottom of the floating crown block; the tail end of the steel wire rope is fixed on the earring screw, and the head end of the steel wire rope bypasses the guide wheel of the displacement compensation mechanism I and is then coiled on the center sheave in multiple coils;
subsequently, the head end of the steel wire rope bypasses the guide wheel of the displacement compensation mechanism II and is then fixed on the drilling winch; one end of the large hook lifting rope is fixed to the floating crown block and the large hook is fixed to the other end of the large hook lifting rope; the riser is suspended on the large hook and is fixedly sleeved with an annular ring;
the heave compensation device further comprises a coiling mechanism I and a coiling mechanism II which are positioned on the left side and the right side of the drilling derrick respectively; the coiling mechanism I consists of a motor A, a coiling roller A and a pull rope A; the motor A is fixed on the top of the floating drilling platform; an output shaft of the motor A is connected to one end of the coiling roller A
via a coupling; one end of the pull rope A is fixed to the coiling roller A, and the other end of the pull rope A is welded to the left side of the annular ring; the coiling mechanism II consists of a motor B, a coiling roller B and a pull rope B, wherein the motor B is fixed to the top of the floating drilling platform; an output shaft of the motor B is connected to one end of the coiling roller B via a coupling; one end of the pull rope B is fixed to the coiling roller B, and the other end of the pull rope B is welded to the
the displacement compensation mechanism I comprises a first connecting rod, a second connecting rod, a guide wheel, and a hydraulic compensation cylinder, wherein the lower end of the first connecting rod is hinged to the top of the stand, and the other end of the first connecting rod is hinged to the middle part of the guide wheel; one end of the second connecting rod is hinged to the middle part of the guide wheel, and the other end of the second connecting rod is hinged to the middle part of the central sheave;
the hydraulic compensation cylinder is obliquely arranged to the right upwards; a cylinder barrel of the hydraulic compensation cylinder is hinged to the stand;
a piston rod of the hydraulic compensation cylinder is hinged to the bottom of the floating crown block; the tail end of the steel wire rope is fixed on the earring screw, and the head end of the steel wire rope bypasses the guide wheel of the displacement compensation mechanism I and is then coiled on the center sheave in multiple coils;
subsequently, the head end of the steel wire rope bypasses the guide wheel of the displacement compensation mechanism II and is then fixed on the drilling winch; one end of the large hook lifting rope is fixed to the floating crown block and the large hook is fixed to the other end of the large hook lifting rope; the riser is suspended on the large hook and is fixedly sleeved with an annular ring;
the heave compensation device further comprises a coiling mechanism I and a coiling mechanism II which are positioned on the left side and the right side of the drilling derrick respectively; the coiling mechanism I consists of a motor A, a coiling roller A and a pull rope A; the motor A is fixed on the top of the floating drilling platform; an output shaft of the motor A is connected to one end of the coiling roller A
via a coupling; one end of the pull rope A is fixed to the coiling roller A, and the other end of the pull rope A is welded to the left side of the annular ring; the coiling mechanism II consists of a motor B, a coiling roller B and a pull rope B, wherein the motor B is fixed to the top of the floating drilling platform; an output shaft of the motor B is connected to one end of the coiling roller B via a coupling; one end of the pull rope B is fixed to the coiling roller B, and the other end of the pull rope B is welded to the
4 right side of the annular ring;
the heave compensation device further comprises an energy accumulator and a control valve, wherein a control valve is connected to an output port of the energy accumulator; a T-branch pipe is connected to the other end of the control valve; two ports of the T-branch pipe are communicated with rodless cavities of two hydraulic compensation cylinders via pipelines.
The drilling winch comprises a motor C, a coiling roller C, and a speed reducer, wherein the motor C and the speed reducer are respectively arranged on the top of the floating drilling platform; an output shaft of the motor C is connected to an input shaft of the speed reducer; a coiling roller C is connected to an output shaft of the speed reducer via a coupling.
The head end of the steel wire rope bypasses the guide wheel of the displacement compensation mechanism II and is then fixed to the coiling roller C.
The large hook is located below the floating drilling platform.
The floating drilling platform is provided with a through groove which is located right below the drilling derrick.
The large hook lifting rope penetrates through the through groove.
The coiling mechanism I and the coiling mechanism II are arranged relative to the drilling derrick in a left-right symmetrical manner.
The energy accumulator is arranged on the stand.
BENEFICAL EFFECTS OF THE INVENTION
BENEFICAL EFFECTS
The present invention has the following advantages of simple structure, vertical lowering of a riser, good reliability, high compensation efficiency and high system response speed.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a structural schematic diagram of the present invention;
FIG. 2 is a working schematic diagram of a compensation device when the seawater level rises;
FIG. 3 is a working schematic diagram of the compensation device when the seawater level descends;
FIG. 4 is a schematic structural diagram of a floating crown block.
In drawings, reference symbols represent the following components: 1-floating drilling platform; 2-stand; 3-drilling derrick; 4-earring screw; 5-spring; 6-pressure plate;
7-flating crown block; 8-central sheave; 9-large hook; 10-riser; 11-large hook lifting rope; 12-steel wire rope; 13-first connecting rod; 14-second connecting rod;
15-guide wheel; 16-hydraulic compensation cylinder; 17-annular ring; 18-motor A; 19-coiling roller A; 20-pull rope A; 21-motor B; 22-coiling roller B; 23-pull rope B; 24-energy accumulator; 25-control valve; 26-motor C; 27-coiling roller C; 28-pipeline;
29-sea surface.
EMBODIMENTS OF THE INVENTION
DETAILED DESCRIPTION
The present invention will be further described below in conjunction with the accompanying drawings, and the protection scope of the present invention is not limited as follows:
as shown in FIGS. 1 and 4, a passive deep-sea heave compensation device for ocean platform drilling comprises a floating drilling platform 1, a stand 2 arranged on the top of the floating drilling platform 1, and a drilling derrick 3 arranged on the top of the stand 2, wherein an earring screw 4 and a drilling winch are arranged on the top of the floating drilling platform 1 and located on the left side and the right side of the stand 2 respectively; a vertical guiding groove is formed inside the drilling derrick 3; a vertical spring 5 is fixedly arranged on the top of the guiding groove; a pressure plate 6 which is located in the guiding groove is fixedly arranged on the bottom of the spring
the heave compensation device further comprises an energy accumulator and a control valve, wherein a control valve is connected to an output port of the energy accumulator; a T-branch pipe is connected to the other end of the control valve; two ports of the T-branch pipe are communicated with rodless cavities of two hydraulic compensation cylinders via pipelines.
The drilling winch comprises a motor C, a coiling roller C, and a speed reducer, wherein the motor C and the speed reducer are respectively arranged on the top of the floating drilling platform; an output shaft of the motor C is connected to an input shaft of the speed reducer; a coiling roller C is connected to an output shaft of the speed reducer via a coupling.
The head end of the steel wire rope bypasses the guide wheel of the displacement compensation mechanism II and is then fixed to the coiling roller C.
The large hook is located below the floating drilling platform.
The floating drilling platform is provided with a through groove which is located right below the drilling derrick.
The large hook lifting rope penetrates through the through groove.
The coiling mechanism I and the coiling mechanism II are arranged relative to the drilling derrick in a left-right symmetrical manner.
The energy accumulator is arranged on the stand.
BENEFICAL EFFECTS OF THE INVENTION
BENEFICAL EFFECTS
The present invention has the following advantages of simple structure, vertical lowering of a riser, good reliability, high compensation efficiency and high system response speed.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a structural schematic diagram of the present invention;
FIG. 2 is a working schematic diagram of a compensation device when the seawater level rises;
FIG. 3 is a working schematic diagram of the compensation device when the seawater level descends;
FIG. 4 is a schematic structural diagram of a floating crown block.
In drawings, reference symbols represent the following components: 1-floating drilling platform; 2-stand; 3-drilling derrick; 4-earring screw; 5-spring; 6-pressure plate;
7-flating crown block; 8-central sheave; 9-large hook; 10-riser; 11-large hook lifting rope; 12-steel wire rope; 13-first connecting rod; 14-second connecting rod;
15-guide wheel; 16-hydraulic compensation cylinder; 17-annular ring; 18-motor A; 19-coiling roller A; 20-pull rope A; 21-motor B; 22-coiling roller B; 23-pull rope B; 24-energy accumulator; 25-control valve; 26-motor C; 27-coiling roller C; 28-pipeline;
29-sea surface.
EMBODIMENTS OF THE INVENTION
DETAILED DESCRIPTION
The present invention will be further described below in conjunction with the accompanying drawings, and the protection scope of the present invention is not limited as follows:
as shown in FIGS. 1 and 4, a passive deep-sea heave compensation device for ocean platform drilling comprises a floating drilling platform 1, a stand 2 arranged on the top of the floating drilling platform 1, and a drilling derrick 3 arranged on the top of the stand 2, wherein an earring screw 4 and a drilling winch are arranged on the top of the floating drilling platform 1 and located on the left side and the right side of the stand 2 respectively; a vertical guiding groove is formed inside the drilling derrick 3; a vertical spring 5 is fixedly arranged on the top of the guiding groove; a pressure plate 6 which is located in the guiding groove is fixedly arranged on the bottom of the spring
5; a floating crown block 7 is slidably mounted in the guiding groove and located right below the pressure plate 6; a central sheave 8 whose cylindrical surface is provided
6 with a plurality of trunkings is rotatably mounted in the floating crown block
7; the heave compensation device further comprises a large hook 9, a riser 10, a large hook lifting rope 11, a steel wire rope 12, as well as a displacement compensation mechanism 1 and a right displacement compensation mechanism II which are arranged on the left side and the right side of a stand 2 respectively; the displacement compensation mechanism I and the right displacement compensation mechanism II are arranged in a left-right symmetrical manner;
the displacement compensation mechanism 1 comprises a first connecting rod 13, a second connecting rod 14, a guide wheel 15, and a hydraulic compensation cylinder 16. wherein the lower end of the first connecting rod 13 is hinged to the top of the stand 2, and the other end of the first connecting rod 13 is hinged to the middle part of the guide wheel 15; one end of the second connecting rod 14 is hinged to the middle part of the guide wheel 15, and the other end of the second connecting rod 14 is hinged to the middle part of the central sheave 8; the hydraulic compensation cylinder 16 is obliquely arranged to the right upwards; a cylinder barrel of the hydraulic compensation cylinder 16 is hinged to the stand 2; a piston rod of the hydraulic compensation cylinder 16 is hinged to the bottom of the floating crown block 7; the tail end of the steel wire rope 12 is fixed on the earring screw 4, and the head end of the steel wire rope 12 bypasses the guide wheel 15 of the displacement compensation mechanism I and is then coiled on the center sheave 8 in multiple coils; subsequently, the head end of the steel wire rope 12 bypasses the guide wheel 15 of the displacement compensation mechanism II and is then fixed on the drilling winch; one end of the large hook lifting rope 11 is fixed to the floating crown block 7, and the large hook 9 is fixed to the other end of the large hook lifting rope 11; the large hook 9 is located below the floating drilling platform 1; the riser 10 is suspended on the large hook 9 and is fixedly sleeved with an annular ring 17.
The heave compensation device further comprises a coiling mechanism I and a coiling mechanism II which are positioned on the left side and the right side of the drilling derrick 3 respectively; the coiling mechanism I and the coiling mechanism II
are arranged relative to the drilling derrick 3 in a left-right symmetrical manner; the coiling mechanism I consists of a motor A 18, a coiling roller A 19 and a pull rope A
20; the motor A 18 is fixed on the top of the floating drilling platform I; an output shaft of the motor A 18 is connected to one end of the coiling roller A 19 via a coupling; one end of the pull rope A 20 is fixed to the coiling roller A 19, and the other end of the pull rope A20 is welded to the left side of the annular ring 17; the coiling mechanism II
consists of a motor B 21, a coiling roller B 22 and a pull rope B 23, wherein the motor B 21 is fixed to the top of the floating drilling platform I; an output shaft of the motor B 21 is connected to one end of the coiling roller B 22 via a coupling; one end of the pull rope B 23 is fixed to the coiling roller B 22, and the other end of the pull rope B23 is welded to the right side of the annular ring 17.
The heave compensation device further comprises an energy accumulator 24 and a control valve 25, wherein the energy accumulator 24 is arranged on the stand 2; the control valve 25 is connected to an output port of the energy accumulator 24;
a T-branch pipe is connected to the other end of the control valve; two ports of the T-branch pipe are communicated with rodless cavities of two hydraulic compensation cylinders 16 via pipelines 28.
The drilling winch comprises a motor C 26, a coiling roller C 27, and a speed reducer, wherein the motor C 26 and the speed reducer are respectively arranged on the top of the floating drilling platform 1; an output shaft of the motor C 26 is connected to an input shaft of the speed reducer via a coupling; a coiling roller C 27 is connected to an output shaft of the speed reducer via a coupling.
The head end of the steel wire rope 12 bypasses the guide wheel 15 of the displacement compensation mechanism II and is then fixed on the coiling roller C27.
The floating drilling platform 1 is provided with a through groove which is located right below the drilling derrick 3. The large hook lifting rope 11 penetrates through the through groove.
The working process of the present invention is as follows: as shown in FIG.
1, when the riser 10 is lowered, hydraulic oil in the rodless cavity of the hydraulic
the displacement compensation mechanism 1 comprises a first connecting rod 13, a second connecting rod 14, a guide wheel 15, and a hydraulic compensation cylinder 16. wherein the lower end of the first connecting rod 13 is hinged to the top of the stand 2, and the other end of the first connecting rod 13 is hinged to the middle part of the guide wheel 15; one end of the second connecting rod 14 is hinged to the middle part of the guide wheel 15, and the other end of the second connecting rod 14 is hinged to the middle part of the central sheave 8; the hydraulic compensation cylinder 16 is obliquely arranged to the right upwards; a cylinder barrel of the hydraulic compensation cylinder 16 is hinged to the stand 2; a piston rod of the hydraulic compensation cylinder 16 is hinged to the bottom of the floating crown block 7; the tail end of the steel wire rope 12 is fixed on the earring screw 4, and the head end of the steel wire rope 12 bypasses the guide wheel 15 of the displacement compensation mechanism I and is then coiled on the center sheave 8 in multiple coils; subsequently, the head end of the steel wire rope 12 bypasses the guide wheel 15 of the displacement compensation mechanism II and is then fixed on the drilling winch; one end of the large hook lifting rope 11 is fixed to the floating crown block 7, and the large hook 9 is fixed to the other end of the large hook lifting rope 11; the large hook 9 is located below the floating drilling platform 1; the riser 10 is suspended on the large hook 9 and is fixedly sleeved with an annular ring 17.
The heave compensation device further comprises a coiling mechanism I and a coiling mechanism II which are positioned on the left side and the right side of the drilling derrick 3 respectively; the coiling mechanism I and the coiling mechanism II
are arranged relative to the drilling derrick 3 in a left-right symmetrical manner; the coiling mechanism I consists of a motor A 18, a coiling roller A 19 and a pull rope A
20; the motor A 18 is fixed on the top of the floating drilling platform I; an output shaft of the motor A 18 is connected to one end of the coiling roller A 19 via a coupling; one end of the pull rope A 20 is fixed to the coiling roller A 19, and the other end of the pull rope A20 is welded to the left side of the annular ring 17; the coiling mechanism II
consists of a motor B 21, a coiling roller B 22 and a pull rope B 23, wherein the motor B 21 is fixed to the top of the floating drilling platform I; an output shaft of the motor B 21 is connected to one end of the coiling roller B 22 via a coupling; one end of the pull rope B 23 is fixed to the coiling roller B 22, and the other end of the pull rope B23 is welded to the right side of the annular ring 17.
The heave compensation device further comprises an energy accumulator 24 and a control valve 25, wherein the energy accumulator 24 is arranged on the stand 2; the control valve 25 is connected to an output port of the energy accumulator 24;
a T-branch pipe is connected to the other end of the control valve; two ports of the T-branch pipe are communicated with rodless cavities of two hydraulic compensation cylinders 16 via pipelines 28.
The drilling winch comprises a motor C 26, a coiling roller C 27, and a speed reducer, wherein the motor C 26 and the speed reducer are respectively arranged on the top of the floating drilling platform 1; an output shaft of the motor C 26 is connected to an input shaft of the speed reducer via a coupling; a coiling roller C 27 is connected to an output shaft of the speed reducer via a coupling.
The head end of the steel wire rope 12 bypasses the guide wheel 15 of the displacement compensation mechanism II and is then fixed on the coiling roller C27.
The floating drilling platform 1 is provided with a through groove which is located right below the drilling derrick 3. The large hook lifting rope 11 penetrates through the through groove.
The working process of the present invention is as follows: as shown in FIG.
1, when the riser 10 is lowered, hydraulic oil in the rodless cavity of the hydraulic
8 compensation cylinder 16 is pumped out, and a piston rod of the hydraulic compensation cylinder 16 retracts. The floating crown block 7 moves downward along the guiding groove, and the riser 10 suspended on the large hook 9 at this moment enters the sea bottom. During the descending process, if the riser 10 is observed to be tilted to the left, the worker on the floating drilling platform 1 turns on the motor B21. The motor B21 drives the coiling roller B22 to rotate, the pull rope B23 is gradually wound up on the coiling roller B22 and applies a rightward pulling force to the annular ring 17, thereby further pulling the riser 10 to the right. When the riser 10 is in a vertical state, the motor B 21 is turned off If the riser 10 is observed to be tilted to the right, the worker on the floating drilling platform 1 turns on the motor Al 8. The motor Al8 drives the coiling roller A19 to rotate, the pull rope A20 is gradually wound up on the coiling roller Al9 and applies a leftward pulling force to the annular ring 17, thereby further pulling the riser 10 to the left. When the riser 10 is in a vertical state, the motor Al8 is turned off. Therefore, the device ensures a vertical drop of the riser 10, and further ensures the safety of the subsequently lowered drill string and the drilled drill bit.
During the development of deep-sea oil and gas, due to complex and variable environments of the working sea area, the heave movement state of the floating drilling platform 1 changes rapidly, and the smooth operation of the drilling operation is greatly affected. However, the device is capable of compensating for the vertical displacement of the riser 10 to further ensure smooth drilling. As shown in FIG. 2, when the floating drilling platform 1 rises with the waves, the load of the large hook 9 increases, and the piston rod in the hydraulic compensation cylinder 16 moves upward, causing gas in the energy accumulator 24 to expand. The floating crown block 7 moves upward along the guiding groove relative to the drilling derrick 3, and the floating crown block 7 presses against the pressure plate 6, and the pressure plate 6 then compresses the spring 5.
Meanwhile, one end of each of the two second connecting rods 14 moves upward with the floating crown block 7, and the second connecting rod 14 drives the first connecting rod 13 to expand outward, further driving the guide wheel 15 to tension the steel wire rope 12 outwards, and the steel wire rope 12 applies a downward force to the guide
During the development of deep-sea oil and gas, due to complex and variable environments of the working sea area, the heave movement state of the floating drilling platform 1 changes rapidly, and the smooth operation of the drilling operation is greatly affected. However, the device is capable of compensating for the vertical displacement of the riser 10 to further ensure smooth drilling. As shown in FIG. 2, when the floating drilling platform 1 rises with the waves, the load of the large hook 9 increases, and the piston rod in the hydraulic compensation cylinder 16 moves upward, causing gas in the energy accumulator 24 to expand. The floating crown block 7 moves upward along the guiding groove relative to the drilling derrick 3, and the floating crown block 7 presses against the pressure plate 6, and the pressure plate 6 then compresses the spring 5.
Meanwhile, one end of each of the two second connecting rods 14 moves upward with the floating crown block 7, and the second connecting rod 14 drives the first connecting rod 13 to expand outward, further driving the guide wheel 15 to tension the steel wire rope 12 outwards, and the steel wire rope 12 applies a downward force to the guide
9 wheel 15. Meanwhile, the pressure plate 6 is also pressed against the floating crown block 7 under the restoring force of the spring 5. Under these two forces, the rapid reset of the floating crown block 7 is ensured, thereby compensating for the displacement of the large hook and the drill string due to the rise of the floating drilling platform 1, to ensure that the displacement of the riser in the vertical direction is always unchanged.
As shown in FIG. 3, when the floating drilling platform 1 descends with the waves, the load of the large hook 9 is reduced, and the piston rod in the hydraulic compensation cylinder 16 is moved downwards, so that the gas in the energy accumulator 24 is compressed. The floating crown block 7 moves downward along the guiding groove relative to the drilling derrick 3. Meanwhile, one end of each of the two second connecting rods 14 moves downwards with the floating crown block 7, and the second connecting rod 14 drives the first connecting rod 13 to contract inwards, and the steel wire rope 12 is in a relaxed state. At this time, the compressed gas in the energy accumulator 24 has a tendency to drive the piston rod of the hydraulic compensation cylinder 16 to extend upwards. After the piston rod extends, the floating crown block 7 is reset, thereby compensating for the displacement of the large hook and the drill string due to the lowering of the floating drilling platform 1, to ensure that the displacement of the riser in the vertical direction is always unchanged. Therefore, the device has the characteristics of high compensation efficiency, high system response speed, and response sensitivity, does not require external hydraulic components to participate, and ensuring the smooth drilling of the drill bit.
As shown in FIG. 3, when the floating drilling platform 1 descends with the waves, the load of the large hook 9 is reduced, and the piston rod in the hydraulic compensation cylinder 16 is moved downwards, so that the gas in the energy accumulator 24 is compressed. The floating crown block 7 moves downward along the guiding groove relative to the drilling derrick 3. Meanwhile, one end of each of the two second connecting rods 14 moves downwards with the floating crown block 7, and the second connecting rod 14 drives the first connecting rod 13 to contract inwards, and the steel wire rope 12 is in a relaxed state. At this time, the compressed gas in the energy accumulator 24 has a tendency to drive the piston rod of the hydraulic compensation cylinder 16 to extend upwards. After the piston rod extends, the floating crown block 7 is reset, thereby compensating for the displacement of the large hook and the drill string due to the lowering of the floating drilling platform 1, to ensure that the displacement of the riser in the vertical direction is always unchanged. Therefore, the device has the characteristics of high compensation efficiency, high system response speed, and response sensitivity, does not require external hydraulic components to participate, and ensuring the smooth drilling of the drill bit.
Claims (8)
1 . A passive deep-sea heave compensation device for ocean platform drilling, comprising a floating drilling platform, a stand arranged on the top of the floating drilling platform, and a drilling derrick arranged on the top of the stand, wherein an earring screw and a drilling winch are arranged on the top of the floating drilling platform and located on the left side and the right side of the stand respectively; a vertical guiding groove is formed inside the drilling derrick; a vertical spring is fixedly arranged on the top of the guiding groove; a pressure plate which is located in the guiding groove is fixedly arranged on the bottom of the spring; a floating crown block is slidably mounted in the guiding groove and located right below the pressure plate; a central sheave whose cylindrical surface is provided with a plurality of trunkings is rotatably mounted in the floating crown block; the heave compensation device further comprises a large hook, a riser, a large hook lifting rope, a steel wire rope, as well as a displacement compensation mechanism I and a right displacement compensation mechanism II which are arranged on the left side and the right side of the stand respectively; the displacement compensation mechanism I and the right displacement compensation mechanism II are arranged in a left-right symmetrical manner;
the displacement compensation mechanism I comprises a first connecting rod, a second connecting rod, a guide wheel, and a hydraulic compensation cylinder, wherein the lower end of the first connecting rod is hinged to the top of the stand, and the other end of the first connecting rod is hinged to the middle part of the guide wheel; one end of the second connecting rod is hinged to the middle part of the guide wheel, and the other end of the second connecting rod is hinged to the middle part of the central sheave; the hydraulic compensation cylinder is obliquely arranged to the right upwards; a cylinder barrel of the hydraulic compensation cylinder is hinged to the stand; a piston rod of the hydraulic compensation cylinder is hinged to the bottom of the floating crown block;
the tail end of the steel wire rope is fixed on the earring screw, and the head end of the steel wire rope bypasses the guide wheel of the displacement compensation mechanism I
and is then coiled on the center sheave in multiple coils; subsequently, the head end of the steel wire rope bypasses the guide wheel of the displacement compensation mechanism II
and is then fixed on the drilling winch; one end of the large hook lifting rope is fixed to the Date Recue/Date Received 2020-12-14 floating crown block, and the large hook is fixed to the other end of the large hook lifting rope; the riser is suspended on the large hook and is fixedly sleeved with an annular ring;
the heave compensation device further comprises a coiling mechanism I and a coiling mechanism II which are positioned on the left side and the right side of the drilling derrick respectively; the coiling mechanism I consists of a motor A, a coiling roller A and a pull rope A; the motor A is fixed on the top of the floating drilling platfomi; an output shaft of the motor A is connected to one end of the coiling roller A via a coupling;
one end of the pull rope is fixed to the coiling roller A, and the other end of the pull rope A is welded to the left side of the annular ring; the coiling mechanism II consists of a motor B, a coiling roller B and a pull rope B, wherein the motor B is fixed to the top of the floating drilling platform; an output shaft of the motor B is connected to one end of the coiling roller B via a coupling; one end of the pull rope B is fixed to the coiling roller B, and the other end of the pull rope B is welded to the right side of the annular ring;
the heave compensation device further comprises an energy accumulator and a control valve, wherein the control valve is connected to an output port of the energy accumulator;
a T-branch pipe is connected to the other end of the control valve; two ports of the T-branch pipe are communicated with rodless cavities of two hydraulic compensation cylinders via pipelines.
the displacement compensation mechanism I comprises a first connecting rod, a second connecting rod, a guide wheel, and a hydraulic compensation cylinder, wherein the lower end of the first connecting rod is hinged to the top of the stand, and the other end of the first connecting rod is hinged to the middle part of the guide wheel; one end of the second connecting rod is hinged to the middle part of the guide wheel, and the other end of the second connecting rod is hinged to the middle part of the central sheave; the hydraulic compensation cylinder is obliquely arranged to the right upwards; a cylinder barrel of the hydraulic compensation cylinder is hinged to the stand; a piston rod of the hydraulic compensation cylinder is hinged to the bottom of the floating crown block;
the tail end of the steel wire rope is fixed on the earring screw, and the head end of the steel wire rope bypasses the guide wheel of the displacement compensation mechanism I
and is then coiled on the center sheave in multiple coils; subsequently, the head end of the steel wire rope bypasses the guide wheel of the displacement compensation mechanism II
and is then fixed on the drilling winch; one end of the large hook lifting rope is fixed to the Date Recue/Date Received 2020-12-14 floating crown block, and the large hook is fixed to the other end of the large hook lifting rope; the riser is suspended on the large hook and is fixedly sleeved with an annular ring;
the heave compensation device further comprises a coiling mechanism I and a coiling mechanism II which are positioned on the left side and the right side of the drilling derrick respectively; the coiling mechanism I consists of a motor A, a coiling roller A and a pull rope A; the motor A is fixed on the top of the floating drilling platfomi; an output shaft of the motor A is connected to one end of the coiling roller A via a coupling;
one end of the pull rope is fixed to the coiling roller A, and the other end of the pull rope A is welded to the left side of the annular ring; the coiling mechanism II consists of a motor B, a coiling roller B and a pull rope B, wherein the motor B is fixed to the top of the floating drilling platform; an output shaft of the motor B is connected to one end of the coiling roller B via a coupling; one end of the pull rope B is fixed to the coiling roller B, and the other end of the pull rope B is welded to the right side of the annular ring;
the heave compensation device further comprises an energy accumulator and a control valve, wherein the control valve is connected to an output port of the energy accumulator;
a T-branch pipe is connected to the other end of the control valve; two ports of the T-branch pipe are communicated with rodless cavities of two hydraulic compensation cylinders via pipelines.
2. The passive deep-sea heave compensation device for ocean platform drilling according to claim 1, wherein the drilling winch comprises a motor C, a coiling roller C, and a speed reducer, wherein the motor C and the speed reducer are respectively arranged on the top of the floating drilling platform; an output shaft of the motor C
is connected to an input shaft of the speed reducer via a coupling; a coiling roller C is connected to an output shaft of the speed reducer via a coupling.
is connected to an input shaft of the speed reducer via a coupling; a coiling roller C is connected to an output shaft of the speed reducer via a coupling.
3. The passive deep-sea heave compensation device for ocean platform drilling according to claim 1, wherein the head end of the steel wire rope bypasses the guide wheel of the displacement compensation mechanism II and is then fixed to the coiling roller C.
4. The passive deep-sea heave compensation device for ocean platform drilling according to claim 1, wherein the large hook is located below the floating drilling platform.
Date Recue/Date Received 2020-12-14
Date Recue/Date Received 2020-12-14
5. The passive deep-sea heave compensation device for ocean platform drilling according to claim 1, wherein the floating drilling platform is provided with a through groove which is located right below the drilling derrick.
6. The passive deep-sea heave compensation device for ocean platform drilling according to claim 1, wherein the large hook lifting rope penetrates through the through groove.
7. The passive deep-sea heave compensation device for ocean platform drilling according to claim 1, wherein the coiling mechanism I and the coiling mechanism II are arranged relative to the drilling derrick in a left-right symmetrical manner.
8. The passive deep-sea heave compensation device for ocean platform drilling according to claim 1, wherein the energy accumulator is arranged on the stand.
Date Recue/Date Received 2020-12-14
Date Recue/Date Received 2020-12-14
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811198195.X | 2018-10-15 | ||
| CN201811198195.XA CN109098675A (en) | 2018-10-15 | 2018-10-15 | A kind of deep compensation device of passive type deep-sea liter for ocean platform drilling well |
| PCT/CN2019/072904 WO2020077910A1 (en) | 2018-10-15 | 2019-01-24 | Passive type deep sea heave compensation device for ocean platform drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA3050787A1 CA3050787A1 (en) | 2020-04-15 |
| CA3050787C true CA3050787C (en) | 2021-07-20 |
Family
ID=70278470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3050787A Active CA3050787C (en) | 2018-10-15 | 2019-01-24 | Passive deep-ocean heave compensation device for ocean platform drilling |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA3050787C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113998064B (en) * | 2021-11-03 | 2024-01-30 | 江苏科技大学 | High-bearing semi-submersible drilling platform sea wave compensation device and control method |
-
2019
- 2019-01-24 CA CA3050787A patent/CA3050787C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CA3050787A1 (en) | 2020-04-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2020077910A1 (en) | Passive type deep sea heave compensation device for ocean platform drilling | |
| US10081988B2 (en) | Heave compensation winches | |
| CN100507202C (en) | Drilling column heave compensator for floating drill platform in the sea | |
| CN101798909B (en) | Drilling column heave compensation device of marine floating type drilling platform | |
| CN102606088B (en) | Gear-rack displacement multiplication type drill string heave compensator for floating drilling platform | |
| EP3155206B1 (en) | Winches and hoisting systems with heave compensation | |
| CN102943636B (en) | Winch heave compensation device for ocean floating drilling platform | |
| CN101382042B (en) | Ocean floating drill platform string heave compensation device | |
| US20190071938A1 (en) | System and method for providing tension or heave compensation in an offshore drilling environment | |
| CN103946474A (en) | A compensator | |
| CN204283252U (en) | A kind of semi-active type drilling platform crown-block heave compensator | |
| US9567814B2 (en) | Hoisting systems with heave compensation | |
| CN202338231U (en) | Steel wire rope type riser tensioner device | |
| CA3050787C (en) | Passive deep-ocean heave compensation device for ocean platform drilling | |
| CN201236640Y (en) | Novel travelling hoist compensating system | |
| CN102606087B (en) | Gear-rack drill string heave compensator for floating drilling platform | |
| CN114233212B (en) | But offshore drilling platform heave compensation device of electricity generation formula | |
| CN209872190U (en) | Heave compensation piston tensioner | |
| CN203321369U (en) | Direct hydraulic cylinder type drill string heave compensation device | |
| CN206668179U (en) | A kind of three times extended-range drilling well heave compensation system | |
| CN206091904U (en) | Hydraulic cylinder type wire rope tensioning ware | |
| CN109025854A (en) | A kind of mounting structure of the mechanically driver type crown-block heave compensator directive wheel for ocean platform drilling well | |
| CN201606080U (en) | Float drilling device for offshore drilling machine | |
| CN101709646B (en) | Floating drilling device of offshore drill | |
| CN109372446A (en) | A kind of passive compensation wirerope rocker arm body for ocean platform drilling well |