CN107060672B - Control method of hydraulic slurry gate valve - Google Patents
Control method of hydraulic slurry gate valve Download PDFInfo
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- CN107060672B CN107060672B CN201710141677.0A CN201710141677A CN107060672B CN 107060672 B CN107060672 B CN 107060672B CN 201710141677 A CN201710141677 A CN 201710141677A CN 107060672 B CN107060672 B CN 107060672B
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- 239000002002 slurry Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004146 energy storage Methods 0.000 claims abstract description 40
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 238000005553 drilling Methods 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000003129 oil well Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract 1
- 230000009471 action Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000006996 mental state Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
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- Engineering & Computer Science (AREA)
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- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic slurry gate valve control method, which divides an oil supply pipeline of a hydraulic control loop into an upper pipeline section, a lower pipeline section and an energy storage section through a control valve, and the upper pipeline section and the lower pipeline section are respectively connected with a gate valve unloading branch and an oil pump unloading branch in parallel, the energy storage section is connected with an energy storage mechanism through a branch pipe, so that a hydraulic slurry gate valve and an oil pump are always in an unloading state, the operating process of the gate valve is supplied with oil by an energy storage system within a rated pressure range, thereby avoiding pulse oil supply, improving the operating reliability of the gate valve, reducing the high-load operation time of a duplex hydraulic pump and the hydraulic slurry gate valve, and prolonging the service life of the hydraulic slurry gate valve, the oil pump and a control liquid path.
Description
Technical Field
The invention belongs to the technical field of petroleum drilling equipment control, and particularly relates to a hydraulic slurry gate valve control method.
Background
In the process of petroleum drilling, high-pressure slurry is required to be continuously supplied to a downhole drill bit part, the drill bit is cooled, meanwhile, the drilled rock powder is diluted and stirred, and the circulating slurry is taken out of a well mouth; on the other hand, in the oil drilling operation, when the drill bit reaches the length of one drill rod, the drill rod which is not earned and enters the well needs to be lifted above the ground, one drill rod is connected, all the drill rods are lowered into the well, and the drill bit is driven to rotate by the kelly bar to continue the drilling operation. In the processes of assembling and disassembling the drill rod and tripping in and out, the drill rod stops rotating, and the supply of slurry must be stopped in time, so that the slurry in the well is stopped circularly, the spraying and waste of the slurry are avoided, and the occurrence of serious accidents of equipment and human bodies is prevented. Therefore, the gate valve is generally controlled by the configured slurry, and the gate valve is opened and closed frequently, so that the on-off of the slurry circulation is effectively controlled in real time.
At present, the slurry gate valve is controlled in a manual mode and a pneumatic mode, the manually controlled slurry gate valve is simple in structure, and the reliability of opening and closing switching actions of the gate valve is high; the method has the defects of high labor intensity, poor sensitivity of operation action due to the influence of factors such as links of transmitting and receiving instructions, mental states of operators and the like, and the operators must stay near the high-pressure manifold, so that personal injury is easily caused once the gate valve and the manifold break down, and even serious accidents are caused. The pneumatic slurry gate valve is sensitive in operation action and can realize remote operation; however, the high-pressure pneumatic control gate valve has the defects of large impact force on the gate valve, easy damage of components, short service life, high corresponding maintenance and updating cost and corresponding influence on the safety reliability of a mud circulating system and the drilling operation efficiency.
CN86205569 patent discloses a self-controlled overpressure protection pneumatic high-pressure gate valve, which is suitable for frequent operation, and can automatically perform complete pressure relief when the high-pressure fluid medium exceeds a limit value, and also can control the deflation and detachment of a slurry pump clutch, stop the operation of a slurry pump, and can realize dual protection of equipment and a manifold.
Disclosure of Invention
The invention aims to solve the technical problem of providing a hydraulic slurry gate valve control method which can effectively overcome the defects in the prior art, effectively and reliably control the slurry gate valve, and has the advantages of long service life, low power consumption, simple and convenient operation and low labor intensity.
The technical scheme adopted for achieving the purpose is as follows: a control method of a hydraulic slurry gate valve comprises the following steps:
1) an oil supply pipeline of the hydraulic control loop is divided into an upper pipeline section, a lower pipeline section and an energy storage section through a control valve, a gate valve unloading branch and an oil pump unloading branch are respectively connected in parallel to the upper pipeline section and the lower pipeline section, and the energy storage section is connected with an energy storage mechanism through a branch pipe;
2) starting the hydraulic pump to enable the pressure in the oil supply pipeline and the energy storage mechanism to reach the upper limit value of the rated operating pressure of the hydraulic slurry gate valve;
3) blocking the lower section and the energy storage section of the oil supply pipeline, opening an oil pump unloading branch, shutting down after pressure relief, and shutting down the hydraulic pump;
4) operating a gate valve of a hydraulic slurry pump according to the requirement of drilling operation, and enabling the gate valve to be in a locking state;
5) blocking the upper section and the energy storage section of the pipeline, opening a gate valve unloading branch to relieve the pressure of the hydraulic slurry gate valve, and turning off the gate valve unloading branch after the pressure is relieved;
6) when the gate valve of the hydraulic slurry pump needs to be operated again, the communication between the upper section of the pipeline and the energy storage section is opened, and then the steps 4) and 5) are repeated;
7) when the pressure in the energy storage mechanism is reduced to the lower limit value of the rated working pressure of the hydraulic slurry gate valve, opening the whole oil supply pipeline, and starting the hydraulic pump to enable the pressure in the oil supply pipeline and the energy storage mechanism to reach the upper limit value of the rated operating pressure of the hydraulic slurry gate valve;
8) and repeating the operations of the steps 3) to 7) until the oil well is drilled.
And in the step 4), the hydraulic slurry gate valve is in a locking state by closing the locking control valve.
The steps 3) -7) are operated remotely through a controller.
The hydraulic slurry gate valve control method has the advantages that:
the whole operation process of the hydraulic slurry gate valve is supplied with oil by an energy storage system which is within the rated operation pressure range of the gate valve and is basically stable, so that pulse oil supply can be avoided, and the operation reliability of the gate valve is greatly improved; and the hydraulic control system of the hydraulic slurry gate valve is operated under intermittent load, the highest pressure of the hydraulic slurry gate valve is controlled within the rated operating pressure range of the hydraulic slurry gate valve, and the load operation time of the hydraulic control system is greatly reduced, so that the method is beneficial to prolonging the service life of the hydraulic slurry gate valve and the service life of the whole control system. In addition, the control method has the advantages of less power consumption, simple and convenient operation and low labor intensity.
Drawings
The invention is further described below with reference to the accompanying drawings:
fig. 1 is a schematic structural view of a hydraulic slurry gate valve control device used in the present invention.
Detailed Description
The hydraulic mud gate valve control device can use a hydraulic mud gate valve control device applied by the applicant in another application, the structure of the hydraulic mud gate valve control device is shown in figure 1, the hydraulic mud gate valve control device comprises a hydraulic control system connected with the hydraulic mud gate valve 1, a box body (not shown) and positioned in the box body, the hydraulic mud gate valve 1 is installed at the top of the box body, the hydraulic control system comprises a hydraulic control loop formed by connecting the hydraulic mud gate valve 1 with a reversing valve 17 and connecting a high-pressure oil pipe of a duplex hydraulic pump 7, and a controller 14 in signal connection with the hydraulic mud gate valve 1, the reversing valve 17 and the duplex hydraulic pump 7 respectively, and the controller 14 can adopt a single chip microcomputer. The duplex hydraulic pump 7 is formed by connecting a front duplex pump in series with a second duplex low-flow high-pressure pump, the power input end of the duplex hydraulic pump is connected with the power machine 6, the power machine 6 can adopt an engine or a motor to provide a hydraulic source for the hydraulic slurry gate valve 1, and therefore the construction is simple and low in cost, and the working condition requirements are met. A locking control valve 18 can be arranged on an oil inlet pipe of the hydraulic mud gate valve 1 to conveniently realize locking of the opening and closing states of the hydraulic mud gate valve 1, and the locking control valve 18 can adopt an electromagnetic control valve which is in signal connection with a controller 14 to realize remote operation. An oil supply pipeline of the hydraulic control loop is divided into an upper pipeline section 2, a lower pipeline section 8 and an energy storage section 3 positioned in the middle through a front control valve 16 and a rear control valve 5, a gate valve unloading branch and an oil pump unloading branch which are respectively communicated with the oil supply pipeline and an oil return pipeline are respectively connected to the upper pipeline section 2 and the lower pipeline section 8 in parallel, the energy storage section is respectively provided with an energy storage mechanism and a pressure detector 4 which are in signal connection with a controller 14 through branch pipes, and the gate valve unloading branch and the oil pump unloading branch are respectively provided with a gate valve unloading valve 15 and an oil pump unloading valve 9 which are in signal connection with the controller 14. The energy storage mechanism adopts a hydraulic energy storage device 11 which comprises a high-pressure container and a rubber air bag 12 positioned in the high-pressure container, the air bag 12 is connected and communicated with a high-pressure air delivery pipe 13, and the space outside the rubber air bag 12 is used for filling high-pressure oil.
The control method of the hydraulic slurry gate valve comprises the following steps:
after the control programs of the duplex hydraulic pump 7, the preposed control valve 16, the postpositional control valve 5, the gate valve unloading valve 15 and the oil pump unloading valve 9 are programmed and recorded in the controller, firstly, the rubber air bag 12 in the hydraulic energy accumulator 12 is inflated to a set pressure, and in order to ensure safety, nitrogen is preferably inflated, and the general pre-charging pressure is 7 MPa; then, under the control of the controller 14, the gate valve unloading valve 15 and the oil pump unloading valve 9 are both in a closed state, and the front control valve 16 and the rear control valve 5 are in an open state; at the moment, the duplex hydraulic pump 7 is started to enable the pressure in the oil supply pipeline and the hydraulic energy storage device 12 to reach the upper limit value of the rated operating pressure of the hydraulic slurry gate valve 1, and the upper limit value can be generally set to be 16 MPa; then, the rear control valve 16 is closed, the duplex hydraulic pump 7 is shut down, the duplex hydraulic pump 7 can be in a standby state, the oil pump unloading valve 9 is opened, the pressure of the lower section 8 of the pipeline is reduced to be lower than the lower limit value (11 MPa) of the rated operating pressure of the hydraulic slurry gate valve 1, and the oil pump unloading valve 9 is immediately closed, so that the load and the power consumption of the duplex hydraulic pump 7 are reduced, and the service life of the duplex hydraulic pump 7 is prolonged. And then closing the preposed control valve 16, opening the gate valve unloading valve 15, reducing the pressure in the upper section 2 of the pipeline to be lower than the rated operating pressure lower limit value (11 MPa) of the hydraulic slurry gate valve 1, and immediately closing the gate valve unloading valve 15, so that the hydraulic slurry pump gate valve 1 is in a pressure relief state, the service life of the hydraulic slurry pump gate valve is prolonged, and meanwhile, the oil pressure in the hydraulic energy accumulator 12 and the pipeline 3 of the energy storage section is kept for reuse.
When the gate valve 1 of the hydraulic slurry pump needs to be operated again, the double hydraulic pump 7 does not need to be started, and the hydraulic pressure in the hydraulic energy accumulator 12 and the energy storage section pipeline 3 can be used for operating only by opening the preposed control valve 16; the above-described operations may be repeated in subsequent drilling operations. When the pressure detector 4 detects that the pressure in the energy storage section pipeline and the hydraulic energy storage device 12 is reduced to the lower limit value (generally 11 MPa) of the rated operating pressure of the hydraulic slurry gate valve 1, the signal is transmitted to the controller 14, the front control valve 16 and the rear control valve 9 are opened under the control of the controller 14, the duplex hydraulic pump 7 is started, and the pressure in the oil supply pipeline and the hydraulic energy storage device 12 is recovered to reach the upper limit value of the rated operating pressure of the hydraulic slurry gate valve 1, so that the circulation operation can be carried out according to the method until the drilling of the oil well is finished.
The operation is carried out according to the method, and the oil is supplied by the energy storage system with basically stable pressure in the operation process, so that pulse oil supply can be avoided, and the operation reliability of the gate valve is greatly improved; in addition, the hydraulic control system of the hydraulic slurry gate valve 1 is operated intermittently under high load, and the highest pressure of the hydraulic slurry gate valve is controlled within the rated working pressure range of the hydraulic slurry gate valve, so that the load operation time of the duplex hydraulic pump 7 and the pipeline is greatly reduced. Therefore, the method is beneficial to prolonging the service life of the hydraulic slurry gate valve, the hydraulic pump and the pipeline system and reducing the failure rate. In addition, the control method has the advantages of less power consumption, simple and convenient operation and low labor intensity.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (3)
1. A control method of a hydraulic slurry gate valve comprises the following steps:
1) an oil supply pipeline of the hydraulic control loop is divided into an upper pipeline section, a lower pipeline section and an energy storage section through a control valve, a gate valve unloading branch and an oil pump unloading branch are respectively connected in parallel to the upper pipeline section and the lower pipeline section, and the energy storage section is connected with an energy storage mechanism through a branch pipe;
2) starting the hydraulic pump to enable the pressure in the oil supply pipeline and the energy storage mechanism to reach the upper limit value of the rated operating pressure of the hydraulic slurry gate valve;
3) blocking the lower section and the energy storage section of the oil supply pipeline, opening an oil pump unloading branch, shutting down after pressure relief, and shutting down the hydraulic pump;
4) operating a gate valve of a hydraulic slurry pump according to the requirement of drilling operation, and enabling the gate valve to be in a locking state;
5) blocking the upper section and the energy storage section of the pipeline, opening a gate valve unloading branch to relieve the pressure of the hydraulic slurry gate valve, and turning off the gate valve unloading branch after the pressure is relieved;
6) when the gate valve of the hydraulic slurry pump needs to be operated again, the communication between the upper section of the pipeline and the energy storage section is opened, and then the steps 4) and 5) are repeated;
7) when the pressure in the energy storage mechanism is reduced to the lower limit value of the rated working pressure of the hydraulic slurry gate valve, opening the whole oil supply pipeline, and starting the hydraulic pump to enable the pressure in the oil supply pipeline and the energy storage mechanism to reach the upper limit value of the rated operating pressure of the hydraulic slurry gate valve;
8) repeating the operations of the steps 3) to 7) until the oil well is drilled;
the method is characterized in that:
in the step 1), the energy storage mechanism adopts a hydraulic energy storage device, the hydraulic energy storage device comprises a high-pressure container and a rubber air bag positioned in the high-pressure container, the air bag is connected and communicated with a high-pressure air delivery pipe, the hydraulic energy storage device and the branch pipe connecting part and the high-pressure air delivery pipe are respectively provided with a control valve, and the hydraulic energy storage device is set to 2 sets.
2. A method of controlling a hydraulically operated mud gate valve as defined in claim 1, wherein: and in the step 4), the hydraulic slurry gate valve is in a locking state by closing the locking control valve.
3. A method of controlling a hydraulic mud gate valve according to claim 1 or 2, wherein: the steps 3) -7) are operated remotely through a controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710141677.0A CN107060672B (en) | 2017-03-10 | 2017-03-10 | Control method of hydraulic slurry gate valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710141677.0A CN107060672B (en) | 2017-03-10 | 2017-03-10 | Control method of hydraulic slurry gate valve |
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| CN107060672A CN107060672A (en) | 2017-08-18 |
| CN107060672B true CN107060672B (en) | 2020-02-18 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6904982B2 (en) * | 1998-03-27 | 2005-06-14 | Hydril Company | Subsea mud pump and control system |
| CN201078226Y (en) * | 2007-08-22 | 2008-06-25 | 杨志高 | Density calibrations apparatus with auto hydraulic pressure pulling and leaning equipment |
| CN201507505U (en) * | 2009-09-23 | 2010-06-16 | 山东广富集团有限公司 | Hydraulic station electromotor intermittent starting booster unit |
| CN202031536U (en) * | 2011-02-25 | 2011-11-09 | 中国石油集团川庆钻探工程有限公司 | Novel control system for well head safety valve |
| CN202391382U (en) * | 2011-12-02 | 2012-08-22 | 重庆新泰标川仪表有限公司 | Wellhead surface safety valve control system |
| US9322243B2 (en) * | 2012-08-17 | 2016-04-26 | S.P.M. Flow Control, Inc. | Automated relief valve control system and method |
| CN103306642B (en) * | 2013-07-01 | 2016-01-20 | 晋中市榆次海洋液压有限公司 | Numerical control and energy saving is without rod beam-pumping unit |
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