CN112112583A - Pressure control device for oil-gas well operation - Google Patents
Pressure control device for oil-gas well operation Download PDFInfo
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- CN112112583A CN112112583A CN202011193471.0A CN202011193471A CN112112583A CN 112112583 A CN112112583 A CN 112112583A CN 202011193471 A CN202011193471 A CN 202011193471A CN 112112583 A CN112112583 A CN 112112583A
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- pressure
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- 238000005553 drilling Methods 0.000 claims abstract description 176
- 239000012530 fluid Substances 0.000 claims abstract description 157
- 238000004891 communication Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 12
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
- E21B21/106—Valve arrangements outside the borehole, e.g. kelly valves
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
Abstract
The invention provides a pressure control device for oil-gas well operation. The pressure control device comprises a throttling pressure control unit, a metering unit and a control unit, wherein the throttling pressure control unit and the metering unit are sequentially connected according to the flowing direction of the drilling fluid; the metering unit is configured to obtain the flow rate of the drilling fluid, and is also connected with the drilling fluid vibrating screen and configured to lead the drilling fluid after the flow rate is obtained into the drilling fluid vibrating screen; the control unit is configured to be able to control the operation of the pressure control device. The beneficial effects of the invention can include: the method can know the amount of the drilling fluid entering the shaft and the amount of the drilling fluid returned, is beneficial to judging the leakage and overflow in the well cementation process, and provides key technical guarantee for operation.
Description
Technical Field
The invention relates to the technical field of well control ground equipment for oil and gas well drilling, in particular to a pressure control device for oil and gas well operation.
Background
In the prior art, in the traditional well cementation process, casing pressure does not need to be controlled at a well mouth, and leakage may be caused when stratum operation is performed by aiming at a narrow safe density window, the normal injection and reverse injection mode operation of wearing a shoe and a cap is adopted, so that the well cementation quality is not high, and the well shaft integrity is not good. Therefore, on the basis of the development of fine pressure control drilling, a pressure control cementing technology is developed in the industry, namely, the fine pressure control drilling technology concept is adopted, the bottom hole pressure profile of the circulating process of well cementation operation and the pump stopping process is dynamically controlled, the ground wellhead casing pressure is timely adjusted, and all adopted equipment are pressure control drilling equipment, namely automatic throttling skid-mounting and back pressure compensation skid-mounting. The main disadvantages of this mode of operation are at present: firstly, well sites are limited in the well cementation process, two sets of fine pressure control drilling equipment (the occupied area is about 8m x 6m) are temporarily required to be installed when pressure control well cementation is adopted, and small well sites in many mountainous areas are difficult to install; secondly, the long-distance water feeding of the back pressure compensation pry in the existing equipment has problems, and the water feeding efficiency is not high; and thirdly, the measurement is difficult, how much drilling fluid enters the shaft, and how much drilling fluid returns to the drilling fluid injection is difficult to be known, which may cause the leakage and overflow in the well cementation process to be difficult to judge.
Disclosure of Invention
In view of the deficiencies in the prior art, it is an object of the present invention to address one or more of the problems in the prior art as set forth above. For example, one of the objectives of the present invention is to provide a pressure control device for oil and gas well operation, which is suitable for the pressure control and well cementation process of oil and gas well drilling, and realizes automatic monitoring and control of wellhead casing pressure during circulation and stopping circulation in a wellbore.
In order to achieve the purpose, the invention provides a pressure control device for oil and gas well operation. The pressure control device can comprise a throttling pressure control unit, a metering unit and a control unit, wherein the throttling pressure control unit and the metering unit are sequentially connected according to the flowing direction of the drilling fluid, and the throttling pressure control unit can receive the drilling fluid and is configured to perform throttling pressure control on the drilling fluid; the metering unit is configured to be capable of acquiring the flow rate of the drilling fluid after throttling and pressure controlling, and is also connected with the drilling fluid vibrating screen and configured to be capable of introducing the drilling fluid after acquiring the flow rate into the drilling fluid vibrating screen; the control unit is configured to be able to control the operation of the pressure control device.
In an exemplary embodiment of the present invention, the pressure control device may further include a compensation unit, one end of the compensation unit is connected to the metering unit, and the other end of the compensation unit is communicated with the wellbore, and the compensation unit is configured to enable the drilling fluid after obtaining the flow rate to pass through the wellbore.
In an exemplary embodiment of the present invention, the compensation unit may include a second manual or automatic throttle valve, a second flow meter, a drilling fluid tank, a power assembly, and a third flow meter, which are sequentially connected according to a drilling fluid flow direction, wherein,
the second manual or automatic throttling valve is connected with the metering unit and is configured to enable the drilling fluid after the flow is obtained to be led into a drilling fluid tank;
the second flow meter and the third flow meter are both configured to count the flow of the drilling fluid;
the drilling fluid tank is configured to be capable of storing drilling fluid;
the power assembly is configured to enable passage of drilling fluid in the drilling fluid tank into a wellbore.
In an exemplary embodiment of the invention, the compensating unit may further include a relief valve having one end connected to the power assembly and the other end connected to the drilling fluid tank, the relief valve being configured to open and introduce drilling fluid into the drilling fluid tank to reduce the internal pressure in the event of an excessive internal pressure in the power assembly.
In an exemplary embodiment of the present invention, the pressure control device may further include a manifold unit, the manifold unit being in communication with the wellbore, wherein,
the manifold unit is connected with the throttling and pressure controlling unit and is configured to enable drilling fluid in a wellbore to pass into the throttling and pressure controlling unit;
the manifold unit is further connected with the compensation unit and is configured to enable the obtained drilling fluid to pass into a well bore and/or the throttling and pressure controlling unit.
In an exemplary embodiment of the invention, the pressure control device may further include a manifold unit, the manifold unit being in communication with the wellbore, the manifold unit being connected with the throttling pressure control unit and configured to enable drilling fluid in the wellbore to pass into the throttling pressure control unit.
In an exemplary embodiment of the present invention, the throttle pressure control unit may include at least one throttle pressure control passage including a first manual or automatic throttle valve and a filter connected in series according to a drilling fluid flow direction, wherein,
the first manual or automatic throttle valve is capable of receiving drilling fluid and is configured to throttle drilling fluid pressure;
the filter is configured to filter the drilling fluid after throttling and pressure controlling.
In an exemplary embodiment of the invention, the throttling and pressure controlling unit may further include a through passage connected in parallel with the throttling and pressure controlling passage, one end of the through passage may receive drilling fluid, and the other end of the through passage may communicate with the drilling fluid vibrating screen, and the through passage may include a through control valve to control opening and closing of the through passage.
In an exemplary embodiment of the present invention, the throttle pressure control unit may include a first throttle pressure control passage and a second throttle pressure control passage connected in parallel, wherein,
the first throttling and pressure controlling channel comprises a first manual throttling valve and a first filter which are sequentially connected according to the flow direction of the drilling fluid;
the second throttling pressure control channel comprises a first automatic throttling valve and a second filter which are sequentially connected according to the flow direction of the drilling fluid.
In an exemplary embodiment of the invention, the metering unit may include a first flow meter configured to be capable of counting a drilling fluid flow rate.
Compared with the prior art, the beneficial effects of the invention can include: the pressure control device can automatically detect the pressure of the wellhead in real time, automatically correct and reject error pressure data, automatically implement throttling control and has higher pressure control precision.
Drawings
The above and other objects and features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:
fig. 1 shows a schematic structural view of a pressure control device for oil and gas well operations in an exemplary embodiment of the present invention.
Description of the main reference numerals:
1. plate valve, 2, plate valve, 3, five-way valve, 4, plate valve, 5, manual-automatic integrated throttle valve, 6, plate valve, 7, five-way valve, 8, plate valve, 9, throttle valve, 10, plate valve, 11, plate valve, 12, plate valve, 13, filter three-way valve, 14, plate valve, 15, five-way valve, 16, plate valve, 17, filter three-way valve, 18, plate valve, 19, three-way valve, 20, flowmeter, 21, plate valve, 22, four-way valve, 23, plate valve, 24, five-way valve, 25, manual-automatic integrated throttle valve, 26, plate valve, 27, flowmeter, 28, drilling fluid tank, 29, motor, 30, gearbox, 31, drilling pump, 32, nitrogen bag, 33, safety valve, 34, plug valve, 35, single-flow valve, 36, flowmeter, 37, variable frequency soft start control cabinet, 38 and control console.
Detailed Description
Hereinafter, the pressure control device for oil and gas well operations according to the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.
The invention provides a pressure control device for oil-gas well operation.
In an exemplary embodiment of the present invention, the pressure control device may include a manifold unit, a throttle pressure control unit, a metering unit, a compensation unit, and a control unit. The throttling and pressure controlling unit can receive drilling fluid and is configured to throttle and control the pressure of the drilling fluid; the metering unit is configured to be capable of acquiring the flow rate of the drilling fluid after throttling and pressure controlling, and is also connected with the drilling fluid vibrating screen and configured to be capable of introducing the drilling fluid after acquiring the flow rate into the drilling fluid vibrating screen; the control unit is configured to be able to control the operation of the pressure control device; one end of the compensation unit is connected with the metering unit, the other end of the compensation unit is communicated with the shaft, and the compensation unit is configured to be capable of introducing the drilling fluid with the acquired flow into the shaft; the manifold unit is communicated with a shaft, is connected with the throttling and pressure controlling unit and is configured to enable drilling fluid in the shaft to pass into the throttling and pressure controlling unit, and is also connected with the compensating unit and is configured to enable the drilling fluid after the flow rate is obtained to pass into the shaft and/or the throttling and pressure controlling unit.
Specifically, the input end of the manifold unit may be respectively communicated with the output ends of the wellbore and the compensation unit through pipelines and may respectively obtain drilling fluid from the wellbore and the compensation unit, the output end of the manifold unit may also be respectively communicated with the input end of the throttling and pressure-controlling unit and the wellbore and may respectively introduce drilling fluid into the wellbore and/or the throttling and pressure-controlling unit, wherein the manifold unit may respectively introduce drilling fluid into the wellbore and/or the throttling and pressure-controlling unit may specifically include the following several conditions: the manifold unit obtains drilling fluid from a shaft and leads the drilling fluid into the throttling and pressure controlling unit; and the manifold unit acquires drilling fluid from the compensation unit and leads the drilling fluid into the shaft and/or the throttling and pressure controlling unit. The manifold unit may include at least one multi-way (e.g., five-way) and a plurality of pipelines leading into the manifold unit and collected by the multi-way, wherein each pipeline may be respectively provided with a control valve for controlling the opening and closing of the corresponding pipeline, the plurality of pipelines leading into the manifold unit may include pipelines communicated with the wellbore or pipelines communicated with the compensation unit, and the plurality of multi-ways may have an output end (the flow of the drilling fluid may be connected through the pipelines) capable of leading the received drilling fluid from the input end of the throttling and pressure controlling unit into the throttling and pressure controlling unit.
Specifically, the input end of the throttling and pressure controlling unit can be connected with the output end of a manifold unit through a pipeline and can obtain drilling fluid from the manifold unit, and the throttling and pressure controlling unit can be configured to throttle and control the drilling fluid. The throttling and pressure-controlling unit may include at least one throttling and pressure-controlling passage and a through passage connected in parallel, wherein the throttling and pressure-controlling passage may include a first manual or automatic throttle valve and a filter connected in sequence, the first manual or automatic throttle valve may receive drilling fluid and may be configured to throttle and control the drilling fluid, and the filter may be configured to filter the drilling fluid after throttling and pressure-controlling; one end of the straight-through channel can receive drilling fluid, the other end of the straight-through channel is communicated with the metering unit, and the straight-through channel comprises a straight-through control valve to control the opening and closing of the straight-through channel. The throttling and pressure controlling unit can also comprise at least two multi-ways (such as five-way), wherein at least one multi-way can be used for being connected with the output end of the manifold unit through a pipeline and outputting the output end to each throttling and pressure controlling channel through other output ends through a pipeline, and each pipeline for connection can be provided with a control valve for controlling the opening and closing of the pipeline; a further at least one manifold may be provided for connecting via a line to the end of the through passage and to the end of each of the throttle pressure control passages and capable of receiving drilling fluid and then outputting the drilling fluid via the line to the metering unit.
In this embodiment, the throttle valves on the throttle pressure control passages may be selected to ensure that all the throttle pressure control passages at least include automatic and manual ones, and when the throttle pressure control passages of the automatic throttle valves fail, the throttle pressure control passages of the manual throttle valves may be selected for emergency use.
Specifically, the input end of the metering unit may be connected to the output end of the throttling and pressure-controlling unit (specifically, the output end of the throttling and pressure-controlling passage or the output end of the through passage) through a pipeline, a control valve may be disposed on the pipeline that is communicated with the metering unit for controlling the opening and closing of the pipeline, and the metering unit may be further configured to be capable of obtaining drilling fluid after throttling and pressure-controlling and metering the flow of the drilling fluid, and then introducing the drilling fluid after flow metering into the drilling fluid vibrating screen. The metering unit can include first flowmeter, first flowmeter sets up on the pipeline of the output of throttle accuse pressure unit to drilling fluid shale shaker to can acquire the flow of drilling fluid, wherein, via can also be provided with a many-pass (for example five-way) on the pipeline that first flowmeter lets in the drilling fluid shale shaker, can be provided with a control valve on the pipeline that many-pass went to the drilling fluid shale shaker for the switching of control line, this many-pass is except leading to an output of drilling fluid shale shaker, still including an output and lead to the compensation unit.
In addition, the other end of the through passage in the throttling and pressure controlling unit can also be communicated with the drilling fluid vibrating screen through a pipeline, and the communicated pipeline can be provided with a control valve for controlling the opening and closing of the pipeline.
Specifically, the input end of the compensation unit is communicated with one output end of the metering unit (specifically, one output end of the compensation unit which is communicated with multiple channels in the metering unit) through a pipeline, and the drilling fluid with the acquired flow rate can be introduced. The compensation unit can comprise a second manual or automatic throttle valve, a second flow meter, a drilling fluid tank, a power assembly and a third flow meter which are connected in sequence, wherein the second manual or automatic throttle valve is connected with the metering unit (specifically, a plurality of channels in the metering unit lead to one output end of the compensation unit) and is configured to lead the drilling fluid after the flow is obtained to the drilling fluid tank; the second flow meter and the third flow meter are both configured to count the flow of the drilling fluid; the drilling fluid tank is configured to be capable of storing drilling fluid; the power assembly is configured to enable passage of drilling fluid in the drilling fluid tank into a wellbore.
In this embodiment, the power assembly may include a motor, a gearbox, and a borehole pump.
In this embodiment, the position of drilling fluid jar in this device can be higher than power component to drilling fluid from the eminence downflow when pumping drilling fluid, for with than the present pump of accuse pressure drilling back pressure compensating system on water from the drilling fluid jar long distance suction water feeding of drilling of well team, efficiency improves greatly.
In addition, the compensation unit can further comprise a safety valve, one end of the safety valve is connected with the power assembly, the other end of the safety valve is connected with the drilling fluid tank, and the safety valve is configured to be opened and feed drilling fluid into the drilling fluid tank to reduce the internal pressure in the case of excessive internal pressure of the power assembly.
The pressure control device for oil and gas well operation in the embodiment at least comprises the following working conditions:
(1) and the drilling fluid in the shaft is introduced into a throttling and pressure-controlling passage of the throttling and pressure-controlling unit from the manifold unit for throttling, pressure-controlling and filtering, and then is delivered to the drilling fluid vibrating screen after flow measurement.
(2) On the basis of the working condition (1), if the throttling and pressure controlling passages of the throttling and pressure controlling unit are all failed or in an emergency, the drilling fluid can directly enter the drilling fluid vibrating screen through the through passage.
(3) When the drilling fluid in the drilling fluid tank needs to be supplemented less, a second manual or automatic throttle valve can be selectively opened to shunt a part of the drilling fluid into the drilling fluid tank on the basis of the working condition (1).
(4) When circulation in the shaft is stopped, circulation pressure consumption needs to be compensated, and casing pressure is increased, drilling fluid can be pumped out from the compensation unit and enters the shaft through the manifold unit, and a part of the drilling fluid can be returned to a drilling fluid tank through the working condition (3).
In another exemplary embodiment of the present invention, the pressure control device may include a manifold unit, a throttle pressure control unit, a metering unit, and a compensation unit, and a control unit.
As shown in fig. 1, the control unit may include a variable frequency soft start control cabinet 37 of the motor 29, a control console 38, and the control console 38 is connected to each automatic flat valve, each automatic throttle valve, each flow meter, and the variable frequency soft start control cabinet 37 through data lines and power lines, respectively, and is capable of controlling work and acquiring data.
In this embodiment, the control unit is designed to be explosion-proof.
In this embodiment, an operation console of the control system is provided with a PLC, a driver, a switching power supply, an interactive control panel, and the like, and is used for collecting data such as pressure and flow and controlling the start and stop of a throttle valve, a flat valve, and a motor.
The manifold unit may include a manifold inlet, which may include a plate valve 1, a plate valve 2, a plate valve 4, and a five-way valve 3 to which all three plate valves are connected, as shown in fig. 1. And the manifold inlet is also provided with a pressure monitoring sensor for monitoring the pressure of the drilling fluid, and the pressure monitoring sensor is also connected with the operating platform.
The throttling and pressure controlling unit may include two throttling and pressure controlling passages and a through passage connected in parallel, where, as shown in fig. 1, the through passage may include a five-way valve 7 (which may also be a four-way valve), a flat valve 11 and a five-way valve 15 connected in sequence, where the five-way valve 7 is connected to the five-way valve 3 at the manifold inlet, and the two throttling and pressure controlling passages connected in parallel include: the first automatic throttling pressure control channel comprises a flat valve 6 (manual or automatic) connected with a five-way channel 7 (which can be a four-way channel), a manual-automatic integrated throttle valve 5 driven by a servo motor, a flat valve 10 (manual), a filter three-way 13 and a flat valve 14 (manual) which are connected with a five-way channel 15 of the straight-through channel in sequence; the manual-automatic integrated throttle valve 5 driven by the servo motor is connected to the control operation platform 38, and if the flat valve 6 is automatically controlled, the automatic flat valve 6 is connected with the control operation platform 38; the second manual throttling pressure control channel comprises a flat valve 8 (manual), a throttle valve 9 (manual), a flat valve 12 (manual), a filter tee joint 17 and a flat valve 16 (manual) which are sequentially connected with a five-way channel 7 (or a four-way channel) and connected with a five-way channel 15 of the straight-through channel.
In this embodiment, only one of the two throttle pressure control passages can be selected, and when the first automatic throttle pressure control passage fails, the second manual throttle pressure control passage can be selected for manual emergency.
As shown in fig. 1, the metering unit may include a flat valve 18 (a five-way valve 15 connected to the through passage), a three-way valve 19 (a two-way valve is also possible), a flow meter 20, a four-way valve 22 (a three-way valve is also possible), a flat valve 23, a five-way valve 24, and a flat valve 21 connected to the five-way valve 15 of the through passage, which are connected in sequence, wherein the other end of the flat valve 21 is connected to the five-way valve 24, and the flow meter 20 is connected to a control console 38.
In this embodiment, when the flow meter in the metering unit is in failure maintenance or the flow meter is not moved under special conditions, the drilling fluid can directly enter the drilling fluid vibrating screen through the through passage.
The compensating unit may comprise a flow splitting section and an electric drilling pump section, wherein, as shown in fig. 1, the flow splitting section may comprise a servo motor driven manual-automatic integrated throttle valve 25 (connected to the four-way 22), a flat valve 26, a flow meter 27, a drilling fluid tank 28; the electric drilling pump part can comprise a motor 29, a gearbox 30 and a drilling pump 31 which are connected in sequence, wherein the inlet of the drilling pump 31 is connected with a drilling liquid tank 28, a safety valve 33 is connected with the outlet end of the drilling pump 31, the other end of the safety valve 33 is connected with the drilling liquid tank 28, a nitrogen bag 32 is connected with the outlet end of the drilling pump 31 and is sequentially connected with a plug valve 34, a check valve 35 and a flow meter 36, and the other end of the flow meter 36 is connected with the flat valve 4.
The pressure control device for oil and gas well operation in the embodiment at least comprises the following working conditions:
in the normal circulation pressure control process, the drilling fluid enters the valve 1 from the arrow direction of the valve 1 and flows to a circulation flow of the drilling fluid vibrating screen through an outlet of 3-7-6-5-10-13-14-15-18-19-20-23-24-.
If the RCH rotary control device is maintained or the flashboards are closed under other conditions in the operation process, a shaft circulates through a pipe bank choke manifold to enter the valve 2 in an arrow way, the shaft enters the valve 2 through an arrow way of the valve 2, passes through a 2-3-7-6-5-10-13-14-15-18-19-20-23-24-outlet to a separator and a drilling fluid vibrating screen, if the branch 6-5-10-13 is blocked or the automatic control fails, the shaft is converted into another branch 8-9-12-17-16, if special working conditions or emergency occurs, a straight-through branch 7-11-15 can be taken, and if the flow meter 20 is damaged or special conditions exist, the circulating route 15-18-19-20-23-24 can be converted into a branch 15-21-24.
When less drilling fluid needs to be replenished in the 28-tank, the valve 25 is opened to shunt a part of the drilling fluid through 25-26-27-28.
When circulation in a shaft is stopped, circulation pressure consumption needs to be compensated, and casing pressure is increased, the drilling fluid is circulated to a drilling fluid tank from 28-31-34-35-36-4-3, a part of the drilling fluid is circulated to the 3-1-shaft, and a part of the drilling fluid can be circulated to the drilling fluid tank from 3-7-6-5-10-13-14-15-18-19-20-23-24-25-26-27-28.
In summary, the advantages of the pressure control device for oil and gas well operation of the present invention may include:
(1) the device integrates the automatic throttling and back pressure compensation skid-mounted devices into a whole, can solve the problem that well sites in a well cementation process are difficult to install in two skid-mounted mountain small well sites in the prior fine pressure control drilling, and can save more than half of occupied area on the same scale;
(2) the position of the drilling fluid tank is higher than that of the power assembly, and the drilling fluid flows to the power assembly from the high position, and compared with the conventional pressure control drilling back pressure compensation device, the efficiency is greatly improved by pumping and feeding water in a long distance;
(3) the problem of difficult measurement can be solved, and how much drilling fluid gets into the pit shaft, how much drilling fluid gets into the drilling fluid reservoir and can obtain the quantization, help accurate judgement well cementation in-process overflow and the loss, provide key technical guarantee for the operation.
Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A pressure control device for oil and gas well operation is characterized in that the pressure control device comprises a throttling pressure control unit, a metering unit and a control unit which are sequentially connected according to the flowing direction of drilling fluid, wherein,
the throttling and pressure controlling unit can receive drilling fluid and is configured to throttle and control the drilling fluid;
the metering unit is configured to be capable of acquiring the flow rate of the drilling fluid after throttling and pressure controlling, and is also connected with the drilling fluid vibrating screen and configured to be capable of introducing the drilling fluid after acquiring the flow rate into the drilling fluid vibrating screen;
the control unit is configured to be able to control the operation of the pressure control device.
2. The pressure control device of claim 1, further comprising a compensation unit having one end connected to the metering unit and another end in communication with a wellbore, the compensation unit configured to enable the flow of drilling fluid to pass into the wellbore.
3. The pressure control device according to claim 2, wherein the compensation unit comprises a second manual or automatic throttle valve, a second flow meter, a drilling fluid tank, a power assembly and a third flow meter, which are connected in sequence according to a drilling fluid flow direction,
the second manual or automatic throttling valve is connected with the metering unit and is configured to enable the drilling fluid after the flow is obtained to be led into a drilling fluid tank;
the second flow meter and the third flow meter are both configured to count the flow of the drilling fluid;
the drilling fluid tank is configured to be capable of storing drilling fluid;
the power assembly is configured to enable passage of drilling fluid in the drilling fluid tank into a wellbore.
4. The pressure control device of claim 3, wherein the compensating unit further comprises a relief valve having one end connected to the power module and the other end connected to the drilling fluid tank, the relief valve being configured to open and allow drilling fluid to enter the drilling fluid tank to reduce the internal pressure in the event of excessive internal pressure in the power module.
5. The pressure control device of claim 2, further comprising a manifold unit in communication with a wellbore, wherein,
the manifold unit is connected with the throttling and pressure controlling unit and is configured to enable drilling fluid in a wellbore to pass into the throttling and pressure controlling unit;
the manifold unit is further connected with the compensation unit and is configured to enable the obtained drilling fluid to pass into a well bore and/or the throttling and pressure controlling unit.
6. The pressure control device of claim 1, further comprising a manifold unit in communication with a wellbore, the manifold unit coupled to the throttling pressure control unit and configured to enable drilling fluid within the wellbore to pass into the throttling pressure control unit.
7. The pressure control device according to claim 1, wherein the throttle pressure control unit comprises at least one throttle pressure control passage comprising a first manual or automatic throttle valve and a filter connected in series according to a drilling fluid flow direction, wherein,
the first manual or automatic throttle valve is capable of receiving drilling fluid and is configured to throttle drilling fluid pressure;
the filter is configured to filter the drilling fluid after throttling and pressure controlling.
8. The pressure control device of claim 7, wherein the throttle pressure control unit further comprises a through passage connected in parallel with the throttle pressure control passage, the through passage having one end capable of receiving drilling fluid and another end in communication with the drilling fluid shaker, the through passage including a through control valve to control opening and closing of the through passage.
9. The pressure control device according to claim 7, wherein the throttle pressure control unit includes a first throttle pressure control passage and a second throttle pressure control passage connected in parallel, wherein,
the first throttling and pressure controlling channel comprises a first manual throttling valve and a first filter which are sequentially connected according to the flow direction of the drilling fluid;
the second throttling pressure control channel comprises a first automatic throttling valve and a second filter which are sequentially connected according to the flow direction of the drilling fluid.
10. The pressure control device of claim 1, wherein the metering unit comprises a first flow meter configured to enable statistical drilling fluid flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011193471.0A CN112112583A (en) | 2020-10-30 | 2020-10-30 | Pressure control device for oil-gas well operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011193471.0A CN112112583A (en) | 2020-10-30 | 2020-10-30 | Pressure control device for oil-gas well operation |
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| US20050096848A1 (en) * | 2003-10-31 | 2005-05-05 | Xutian Hou | Automatic control system and method for bottom hole pressure in the underbalance drilling |
| CN102434120A (en) * | 2011-12-27 | 2012-05-02 | 中国石油集团西部钻探工程有限公司 | Back-pressure compensating device for managed-pressure drilling |
| CN104100219A (en) * | 2013-04-03 | 2014-10-15 | 中国石油天然气集团公司 | Single-throttling-channel pressure control drilling method and device suitable for high-flow change |
| CN110886585A (en) * | 2019-12-02 | 2020-03-17 | 中国石油集团西部钻探工程有限公司 | Automatic throttle control device for back pressure compensation in drilling operation and use method thereof |
| CN111734349A (en) * | 2020-06-18 | 2020-10-02 | 四川恒铭泽石油天然气工程有限公司 | Manual-automatic integrated throttling and pressure controlling system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050096848A1 (en) * | 2003-10-31 | 2005-05-05 | Xutian Hou | Automatic control system and method for bottom hole pressure in the underbalance drilling |
| CN102434120A (en) * | 2011-12-27 | 2012-05-02 | 中国石油集团西部钻探工程有限公司 | Back-pressure compensating device for managed-pressure drilling |
| CN104100219A (en) * | 2013-04-03 | 2014-10-15 | 中国石油天然气集团公司 | Single-throttling-channel pressure control drilling method and device suitable for high-flow change |
| CN110886585A (en) * | 2019-12-02 | 2020-03-17 | 中国石油集团西部钻探工程有限公司 | Automatic throttle control device for back pressure compensation in drilling operation and use method thereof |
| CN111734349A (en) * | 2020-06-18 | 2020-10-02 | 四川恒铭泽石油天然气工程有限公司 | Manual-automatic integrated throttling and pressure controlling system |
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Application publication date: 20201222 |