CN114635656B - Automatic diversion pressure supplementing device and method without stopping pump during stand column connection and drill lifting - Google Patents
Automatic diversion pressure supplementing device and method without stopping pump during stand column connection and drill lifting Download PDFInfo
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- CN114635656B CN114635656B CN202111363261.6A CN202111363261A CN114635656B CN 114635656 B CN114635656 B CN 114635656B CN 202111363261 A CN202111363261 A CN 202111363261A CN 114635656 B CN114635656 B CN 114635656B
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 230000001502 supplementing effect Effects 0.000 title claims abstract description 27
- 238000005553 drilling Methods 0.000 claims abstract description 69
- 239000012530 fluid Substances 0.000 claims abstract description 19
- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 description 5
- 238000012806 monitoring device Methods 0.000 description 4
- 239000013589 supplement Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm 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
- 238000005507 spraying Methods 0.000 description 1
Classifications
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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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- 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
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
-
- 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
- E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
- E21B33/047—Casing heads; Suspending casings or tubings in well heads for plural tubing strings
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
-
- 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
- E21B47/00—Survey of boreholes or wells
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
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- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides an automatic diversion pressure supplementing device and method without stopping a pump during stand column connection and drill lifting, and belongs to the technical field of whole-process pressure control of oil-gas field drilling operation. The device comprises a first pipeline, a second pipeline, a third pipeline, a first flat valve, a second flat valve, a third flat valve, a fourth flat valve, a sixth flat valve, a throttle valve and a throttle valve, wherein the first flat valve, the second flat valve, the fourth flat valve, the sixth flat valve, the throttle valve and the throttle valve are respectively arranged on the pipelines and can be remotely and automatically controlled. The invention can realize automatic diversion and pressure compensation without stopping the pump during the stand column connection and/or the drill-up period; the automatic diversion of drilling fluid can be realized, normal drilling circulation can be met, and ground circulation can be realized for back pressure compensation; the back pressure pump is not used for pressure compensation, and the drilling circulation and pressure compensation integrated regulation is realized based on diversion of the drilling pump; the intelligent and automatic degree of the equipment can be improved; the high-pressure-resistant large-diameter flowmeter is additionally arranged to monitor the inlet flow, so that the accurate monitoring of the inlet and outlet of the drilling circulation system is realized, and the analysis of data and the judgment and identification of complex working conditions are facilitated.
Description
Technical Field
The invention relates to the technical field of whole-process pressure control of drilling operation of oil and gas fields, in particular to an automatic diversion pressure supplementing device and method without stopping a pump during stand column connection and drill lifting.
Background
Along with the increase of the exploration and development force of domestic complex deep hydrocarbon reservoirs, the drilling operation faces more and more complicated engineering problems of leakage and spraying, the fine pressure control drilling plays an important role in reducing drilling fluid leakage, improving drilling aging, realizing geological targets and the like, and along with the large-scale popularization and application in recent years, new problems are found in the operation: (1) When the upright post is connected for pressure compensation, the pressure control precision and the operation mode are both greatly affected by adopting a pressure return pump or a pressure holding method for manual control. The pressure return pump has large volume, needs multiple persons to cooperatively operate, needs to continuously supplement drilling fluid for the liquid storage tank by adopting a filling system, has the problems of poor water feeding efficiency and multiple filling pipelines, and causes large control pressure fluctuation and frequent misoperation risks in the switching process in the operation process. The pressure-building method has low automation level, poor pressure control effect and well control risk caused by insufficient pressure supplement or over-high pressure supplement. (2) The existing drilling ground flow has no inlet flow data acquisition device, the existing fine pressure control drilling overflow and leakage monitoring mainly depends on a micro-flow overflow and leakage monitoring device in an automatic throttling manifold to monitor the outlet flow and compare the outlet flow with the theoretical inlet flow, but the theoretical inlet flow adopts pump flushing calculation, and certain errors (the error caused by ① calculation per se; the error of ② water supply efficiency) exist, so that the misjudgment of well leakage and overflow is easy to be caused, and the inlet flow monitoring needs to be added in the flow improvement to adapt to the requirement of fine pressure control drilling.
At present, the device is researched at home and abroad, but has some defects. The patent application numbers CN201210337203.0, CN201310168063.3 and CN201610879560.8 respectively propose a diversion device, but all lack an inlet flow monitoring device, and the automation degree of valve switching is low. The patent with the application number of CN201310114422.7 provides a shunt manifold scheme based on the operation of double pumps respectively, the switching of the pumps is needed when the stand column is connected and the drill is started and started, and the pressure bearing of the mass flowmeter for monitoring the inlet flow is only 4MPa. The flow dividing device proposed by CN201922123740.5 adopts a non-contact ultrasonic flowmeter to monitor the inlet flow, and has larger error of more than 15%. Compared with the invention, the invention has the following advantages: ① The degree of automation is high. By adopting the electric gate and control software, the one-key switching channel can be remotely realized to realize different functions. ② The flowmeter has high performance. And an electromagnetic flowmeter with pressure bearing of 40MPa is adopted to monitor the inlet flow, so that the accuracy and the pressure bearing capacity are improved. ③ The front end is controllable in pressure. In order to avoid damage to the automatic choke manifold connected with the rear end due to overhigh pressure of the drilling pump, an automatic choke valve is arranged at the front section, the opening is controlled to adjust the pressure level entering the rear end, and the accurate control of the two-stage pressure control completion pressure is realized.
Disclosure of Invention
The present invention aims to address at least one of the above-mentioned deficiencies of the prior art. For example, one of the purposes of the present invention is to solve the problems of low accuracy of pressure compensation control during connection of the vertical column and/or tripping, and the need for additional use of a back pressure pump.
Aiming at the problems, the invention discloses a method and a device for automatically shunting and supplementing pressure without stopping a pump during the process of sleeving the upright post and lifting the drill, so that more convenient and accurate pressure supplementing operation in the stages of splicing the upright post and controlling the pressure and lifting the drill is realized, and an inlet flow monitoring device is additionally arranged in the pressure and pressure supplementing operation to monitor the inlet flow so as to meet the comparison of the inlet flow and the outlet flow and further monitor and judge data more accurately. Therefore, the key equipment of the pressure control well drilling is further optimized, the pressure supplementing feasibility and the inlet flow acquisition precision are improved, the monitoring and control functions of the fine pressure control well drilling are further improved, the well control risk is reduced, the labor intensity of personnel is reduced, and the fine pressure control well drilling operation is promoted to be mechanically, automatically and intelligently developed.
In order to achieve the above object, according to one aspect of the present invention, there is provided an automatic diversion pressure compensating device for connecting a column without stopping a pump during a drill, the automatic diversion pressure compensating device comprising: a first pipeline having a first inlet in communication with the drilling pump, a first outlet connected to the riser, and a first plate valve and a second plate valve sequentially disposed between the first inlet and the first outlet; a second pipeline having a second inlet, a second outlet communicating with the throttle manifold, and a third flat valve, a throttle valve, a fourth flat valve disposed in sequence between the second inlet and the second outlet, the second inlet being connected to a portion of the first pipeline between the first inlet and the first flat valve; and a third pipeline having a third inlet, a third outlet communicating with the circulation tank, and a fifth and sixth flat valve disposed in sequence between the third inlet and the third outlet, the third inlet being connected to a portion of the first pipeline between the first outlet and the second flat valve, wherein the second, fourth, sixth flat valve and the throttle valve are remotely automatically controllable valves.
In an exemplary embodiment of the apparatus of the present invention, the first line may further include a seventh plate valve having one end connected to a sensor connection block (e.g., a pressure sensor connection block) and the other end connected to a portion of the first line between the first inlet and the second inlet.
In an exemplary embodiment of the apparatus of the present invention, the first line may further comprise a flow meter disposed in the first line between the first plate valve and the second plate valve.
In an exemplary embodiment of the apparatus of the present invention, the automatic split pressure compensating apparatus may further include a fourth line including a fourth inlet connected to a portion of the first line between the first inlet and the first plate valve, an eighth plate valve, and a fourth outlet connected to a portion of the third line between the fifth plate valve and the sixth plate valve, which are sequentially disposed.
In an exemplary embodiment of the apparatus of the present invention, the automatic split pressure compensating apparatus may further include a one-key control module remotely connected to the second, fourth, sixth and throttle valves, respectively.
In an exemplary embodiment of the device of the present invention, the automatic diverting and pressure compensating device may further include a real-time monitoring unit capable of collecting and displaying the status of all the plate valves, the throttle valves, and the inlet flow in real time.
Another aspect of the invention provides an oil and gas field pressure control drilling operation system comprising a stand column, a drilling pump, a circulating tank and an automatic diversion pressure supplementing device which is connected with the stand column and does not stop the pump during the drilling period.
In yet another aspect, the invention provides an automatic shunt pressure supplementing method without stopping a pump during stand column connection and drill-up, wherein the automatic shunt pressure supplementing method is realized by using the oil-gas field pressure control drilling operation system. For example, in the automatic diversion pressure supplementing method, the first flat valve, the third flat valve and the fifth flat valve are set to be in a normally open state, the eighth flat valve is set to be in a normally closed state, and the second flat valve is opened or closed to realize the conduction or closing of the first pipeline; opening a fourth flat valve, then opening a throttle valve, and then closing a second flat valve to realize the conduction of a second pipeline; the third pipeline is conducted by closing the second flat valve and then opening the sixth flat valve.
In a further aspect, the present invention provides an automatic diversion and pressure compensation method without stopping a pump during a stand column connection and a drill string, wherein the automatic diversion and pressure compensation method is implemented by the automatic diversion and pressure compensation device according to claim 1, and the first, third and fifth flat valves are set to be in a normally open state, and the method comprises the following steps: during the normal circulation of the drilling process, opening the second plate valve, and closing the fourth plate valve, the sixth plate valve and the throttle valve to allow drilling fluid to enter the riser via the first line; then, under the condition that the sixth flat valve is kept in a closed state all the time in the ground circulation flow of the vertical column connection and the drilling process, the fourth flat valve is opened, the throttle valve is opened, and then the second flat valve is closed, so that drilling fluid enters the throttle manifold to realize pressure compensation; then, in the pressure relief flow, opening a sixth flat valve, and closing the sixth flat valve after relieving the pressure of the vertical pipe to 0; next, the process of returning to the next normal cycle flow is entered, the second flapper valve is opened, the throttle valve is closed, and the fourth flapper valve is closed.
Compared with the prior art, the invention has the beneficial effects that at least one of the following contents is included:
1. the automatic diversion pressure compensation without stopping the pump during the stand column connection and/or the drill jack can be realized;
2. The automatic diversion of drilling fluid can be realized, normal drilling circulation can be met, ground circulation can be realized to carry out back pressure compensation, and under the condition that the back pressure pump is not used for pressure compensation, the diversion is carried out based on the drilling pump to realize the integrated regulation of drilling circulation and pressure compensation; the method has the advantages of reducing the occupied area, strengthening the pressure supplementing precision, reducing the labor intensity and the like;
3. the intelligent and automatic degree of the equipment can be improved.
Drawings
The foregoing and other objects and/or features of the invention will become more apparent from the following description taken in conjunction with the accompanying drawings in which:
FIG. 1 illustrates a schematic diagram of an exemplary embodiment of an automatic shunt pressure compensating device of the present invention with the connection of a post, without stopping the pump during tripping;
FIG. 2 illustrates a two-dimensional schematic of an exemplary embodiment of the automatic shunt pressure compensating device of the present invention without stopping the pump during tripping of the string.
Reference numerals illustrate:
1-first plate valve, 2-second plate valve, 3-third plate valve, 4-fourth plate valve, 5-fifth plate valve, 6-sixth plate valve, 7-seventh plate valve, 8-eighth plate valve, 9-throttle valve, 10-flowmeter, 11-pressure sensor connecting block;
12 a-first inlet, 12 b-first outlet, 13 a-second inlet, 13 b-second outlet, 14 a-third inlet, 14 b-third outlet, 15 a-fourth inlet, 15 b-fourth outlet.
Detailed Description
Hereinafter, the automatic diversion pressure compensation device and method without stopping the pump during the tripping of the vertical column and the drill will be described in detail with reference to the exemplary embodiments.
It should be noted that the terms "first," second, "" third, "" fourth, "… …" and "eighth" are merely used for convenience of description and convenience of distinction and should not be construed as indicating or implying relative importance. It is used merely for convenience in describing and constructing relative orientations or positional relationships and is not intended to indicate or imply that the components referred to must have that particular orientation or position.
FIG. 1 illustrates a schematic diagram of an exemplary embodiment of an automatic shunt pressure compensating device of the present invention with the connection of a post, without stopping the pump during tripping; FIG. 2 illustrates a two-dimensional schematic of an exemplary embodiment of the automatic shunt pressure compensating device of the present invention without stopping the pump during tripping of the string.
As shown in fig. 1 and 2, in an exemplary embodiment of the present invention, the automatic shunt pressure compensating device for connecting the column and the pump without stopping during the drill-up is composed of a first pipeline, a second pipeline, a third pipeline and a fourth pipeline.
Specifically, the first line has a first inlet 12a communicating with the drilling pump, a first outlet 12b connected to the riser, and a seventh plate valve 7, a first plate valve 1, a flow meter 10, and a second plate valve 2 sequentially disposed between the first inlet 12a and the first outlet 12b in the flow direction of the drilling fluid. Through the first pipeline, the drilling fluid pumped by the drilling pump can be provided to the vertical pipe, so that the circulation of the drilling fluid during normal drilling is realized. The drilling fluid flow direction may be from the inlet to the outlet.
The seventh flat valve 7 has one end connected to the pressure sensor connection block 11 (e.g., the upper end in fig. 1) and the other end connected to the portion of the first line between the first inlet 12a and the second inlet 13a (e.g., the lower end in fig. 1). Here, the pressure sensor is installed to pressure sensor connecting block and monitors system pressure, can judge passageway operating condition, jam or not according to pressure data, improves the reliability of use. The flow meter 10 may be used to meter the flow of drilling fluid in the first pipeline, for example, the flow meter 10 may be an electromagnetic flow meter with a pressure of 40 MPa. The flowmeter 10 accurately measures the inlet flow, and can be compared with the outlet flow measured by the fine pressure control automatic choke manifold, so that the inlet and outlet conditions of the whole circulation system are known, and the complex conditions such as lost circulation and overflow are more accurately judged to take corresponding measures.
The second line has a second inlet 13a, a second outlet 13b communicating with the choke manifold, and a third flat valve 3, a choke valve 9, a fourth flat valve 4 arranged in sequence between the second inlet 13a and the second outlet 13 b. The second inlet 13a is connected to the portion of the first line between the first inlet 12a and the first plate valve 1. Through the second pipeline, the first pipeline and the throttling manifold can be communicated when appropriate, and the pressure supplementing function is realized. Here, the choke manifold is preferably a conventional fine-control-pressure automatic choke manifold. The throttle valve can be an electric throttle valve, can be controlled and regulated remotely by a control monitoring system, and is convenient for regulating the inlet flow when the pressure is compensated, so that the pressure compensation is more accurate.
The third line has a third inlet 14a, a third outlet 14b communicating with the circulation tank, and a fifth and sixth flat valve 5, 6 disposed in sequence between the third inlet 14a and the third outlet 14 b. The third inlet 14a is connected to the portion of the first line between the first outlet 12b and the second flapper valve 2. Through the third pipeline, can be when appropriate with the riser via first export and circulation jar intercommunication, be favorable to realizing the pressure release to the riser when connecing working conditions such as stand, tripping.
The fourth line comprises a fourth inlet 15a, an eighth plate valve 8 and a fourth outlet 15b arranged in sequence, said fourth inlet 15a being connected to the portion of the first line between the first inlet 12a and the first plate valve 1, and said fourth outlet 15b being connected to the portion of the third line between the fifth plate valve 5 and the sixth plate valve 6. Here, the arrangement of the fourth pipeline including the eighth plate valve 8 has the advantage of being able to serve as a spare, service line for the first pipeline, thereby facilitating both inspection and maintenance and also facilitating a long-term stable operation of the entire apparatus. That is, when the first pipeline is blocked, damaged or overhauled, a temporary access to the riser can be established by opening the eighth plate valve 8 and the fifth plate valve 5 and closing the first plate valve 1, the second plate valve 2 and the sixth plate valve 6.
In the above-mentioned individual valves, all the flat valves can be switched to two states, and the throttle valve 9 can be switched to a state of partial throttle. The second flat valve 2, the fourth flat valve 4, the sixth flat valve 6, and the throttle valve 9 are valves that can be remotely and automatically controlled, for example, remote electrically controlled valves. Of course, the first, third, fifth, seventh and eighth plate valves 1,3, 5, 7 and 8 may be manual plate valves, and the first, third, fifth and seventh plate valves 1,3, 5 and 7 may be normally opened except for the eighth plate valve 8 which is normally closed, so that the normally opened state is not changed during use, and in special cases, the safety and reliability of the apparatus are increased by manual switching.
It should be noted that the automatic diversion pressure compensating device without stopping the pump during the stand-up and the drill-up of the present invention is not limited to the structure of the above-described exemplary embodiment, for example, the automatic diversion pressure compensating device of the present invention may not include the seventh plate valve 7 and the pressure sensor connecting block 11, the flow meter 10, the eighth plate valve 8 and the fourth pipeline, and still achieve the basic purpose and function of automatic diversion pressure compensating without stopping the pump during the stand-up and/or the drill-up.
In another exemplary embodiment of the present invention, the automatic diversion pressure compensation device without stopping the pump during the stand column connection and the drill start may further comprise a one-key control module and a real-time monitoring unit on the basis of any one of the above exemplary embodiments. The one-key control module is respectively and remotely connected with the second flat valve 2, the fourth flat valve 4, the sixth flat valve 6 and the throttle valve 9, so that one-key remote operation of the second flat valve 2, the fourth flat valve 4, the sixth flat valve 6 and the throttle valve 9 is realized, and the automatic degree and the operation safety are further improved. The real-time monitoring unit can collect and intensively display the states of all the flat valves and the throttle valves in real time and inlet flow. For example, the real-time monitoring unit may be constituted by a collector and a display.
In addition, the automatic diversion pressure compensation device without stopping the pump during the stand column connection and the drill lifting can further form an oil and gas field pressure control drilling operation system with the conventional components such as the stand column, the drill pump, the circulating tank and the like.
The automatic diversion pressure supplementing method without stopping the pump during the stand column connection and the drill lifting can be realized by any automatic diversion pressure supplementing device. When the device is used, the first flat valve, the third flat valve and the fifth flat valve can be set to be in a normally open state, and the eighth flat valve can be set to be in a normally closed state; and, by opening or closing the second flapper valve, the first line is turned on or off; opening a fourth flat valve, then opening a throttle valve, and then closing a second flat valve to realize the conduction of a second pipeline; the third pipeline is conducted by closing the second flat valve and then opening the sixth flat valve.
In an exemplary embodiment of the present invention, the method for automatically diverting and supplementing pressure without stopping the pump during the stand column connection and the drill start is implemented by the automatic diverting and supplementing pressure device as described above, and the first, third and fifth plate valves are set to be in a normally open state, and includes the following steps:
During the normal circulation of the drilling process, opening the second plate valve, and closing the fourth plate valve, the sixth plate valve and the throttle valve to allow drilling fluid to enter the riser via the first line;
Then, under the condition that the sixth flat valve is always kept in a closed state in the ground circulation flow of the vertical column connection and the drilling process, the fourth flat valve is opened, the throttle valve is opened slowly, and then the second flat valve is closed, so that drilling fluid enters the throttle manifold to realize pressure compensation;
Then, in the pressure relief flow, opening a sixth flat valve, and closing the sixth flat valve after relieving the pressure of the vertical pipe to 0;
next, the process of returning to the next normal cycle flow is entered, the second flapper valve is opened, the throttle valve is slowly closed, and the fourth flapper valve is closed.
In another exemplary embodiment of the present invention, the method of automatic shunt pressure compensation without stopping the pump during the stand column connection and the drill start can be implemented by using the automatic shunt pressure compensation device as shown in fig. 1 and 2. In the manual gate, the first, fifth, third and seventh plate valves 1, 5, 3, 7 are in a normally open state, and the eighth plate valve 8 is in a normally closed state. The remote one-key switching channel is realized only by changing four electric gates of the second flat valve 2, the fourth flat valve 4, the sixth flat valve 6, the throttle valve 9 and the like, and the whole channel switching process is realized by controlling the monitoring system to switch in a remote one-key manner, so that the switching state of each gate is remotely displayed in real time. The specific steps of the present exemplary embodiment may be as follows:
(1) Normal circulation flow (drilling process). Drilling fluid flows to the riser via a first line, i.e. via a first plate valve 1, a second plate valve 2. Except for normally open and normally closed valves, the gate switch state at this time is: the second flat valve 2 is opened, and the sixth flat valve 6, the throttle valve 9, and the fourth flat valve 4 are closed.
(2) The ground circulation process (column connection, drill-out process). When working conditions such as vertical column connection, pressure control and drilling lifting are carried out and the like requiring fine pressure control and back pressure compensation are carried out, drilling fluid flows to a fine pressure control automatic choke manifold from a second pipeline, namely a third flat valve 3, a choke valve 9 and a fourth flat valve 4, and wellhead pressure compensation operation is carried out by the fine pressure control choke manifold. Except for normally open and normally closed valves, the gate switch state at this time is: the fourth flat valve 4 is opened, the throttle valve 9 is opened slowly, and finally the second flat valve 2 is closed, during which the sixth flat valve 6 remains closed.
(3) And (5) a pressure relief flow. Residual drilling fluid in the vertical pipe flows to the circulating tank through a third pipeline, namely a fifth flat valve 5 and a sixth flat valve 6 for pressure relief operation. When the ground circulation flow is switched, the pressure of the vertical pipe is required to be relieved to 0 so as to carry out the vertical column connection and the drilling operation. At this time, the gate opening and closing state is based on the ground circulation flow, the sixth flat valve 6 is slowly opened for pressure relief, the next operation can be performed after the pressure is relieved to 0 by referring to the vertical pressure, and the sixth flat valve 6 is closed at the same time.
(4) And recovering the normal circulation flow. When the ground circulation flow returns to the normal flow, the second flat plate valve 2 is opened, then the throttle valve 9 is slowly closed, and after the throttle valve 9 is completely closed, the fourth flat plate valve 4 is closed.
In summary, the automatic diversion pressure supplementing device and method for the connecting column and the pump without stopping during the drilling have the following advantages:
1. The automatic diversion of drilling fluid can be realized, normal drilling circulation can be met, ground circulation can be realized to carry out back pressure compensation, and under the condition that the back pressure pump is not used for pressure compensation, the diversion is carried out based on the drilling pump to realize the integrated regulation of drilling circulation and pressure compensation. The modularized construction of the equipment is further improved, the hydraulic pump can be replaced for working, and the hydraulic pump has the advantages of reducing the occupied area, strengthening the pressure supplementing precision, relieving the manual labor and the like. Compared with a back pressure pump, the hydraulic pump is more miniaturized, and is more beneficial to construction operation in limited operation spaces such as small well sites in Chongqing of Sichuan hilly areas, offshore platforms and the like.
2. The intelligent and automatic degree of the equipment can be improved. The equipment is connected with a fine control pressure control monitoring system, can transmit data in real time and exchange human-computer, and realizes different functions such as drilling circulation, ground circulation, pressure relief and the like by switching channels through one key.
3. The inlet flow monitoring device is additionally arranged, so that the state of the inlet and outlet of the drilling circulation system can be mastered more accurately, and the analysis of data and the judgment and identification of complex working conditions are facilitated.
Although the present invention has been described above with reference to the exemplary embodiments and the accompanying drawings, it should be apparent to those of ordinary skill in the art that various modifications can be made to the above-described embodiments without departing from the spirit and scope of the claims.
Claims (10)
1. An automatic shunting and pressure supplementing device without stopping a pump during stand column connection and drill lifting, which is characterized by comprising:
A first pipeline having a first inlet in communication with the drilling pump, a first outlet connected to the riser, and a first plate valve and a second plate valve sequentially disposed between the first inlet and the first outlet;
A second pipeline having a second inlet, a second outlet communicating with the throttle manifold, and a third flat valve, a throttle valve, a fourth flat valve disposed in sequence between the second inlet and the second outlet, the second inlet being connected to a portion of the first pipeline between the first inlet and the first flat valve; and
A third pipeline having a third inlet, a third outlet communicating with the circulation tank, and a fifth and sixth flat valve disposed in sequence between the third inlet and the third outlet, the third inlet being connected to a portion of the first pipeline between the first outlet and the second flat valve,
The second, fourth and sixth flat valves and the throttle valve are valves capable of being controlled remotely and automatically;
the automatic diversion pressure supplementing device further comprises a fourth pipeline, the fourth pipeline comprises a fourth inlet, an eighth flat valve and a fourth outlet which are sequentially arranged, the fourth inlet is connected with the part of the first pipeline, which is positioned between the first inlet and the first flat valve, and coincides with the second inlet, and the fourth outlet is connected with the part of the third pipeline, which is positioned between the fifth flat valve and the sixth flat valve;
The first line further includes a flow meter disposed in the first line between the first plate valve and a second plate valve, the second plate valve being located between the flow meter and the third inlet.
2. The post, pump-up automatic shunt pressure compensating device of claim 1, wherein the first line further comprises a seventh plate valve having one end connected to the sensor connection block and the other end connected to a portion of the first line between the first inlet and the second inlet.
3. The automatic diversion pressure compensation device without stopping the pump during the stand column and the drill starting of claim 1, wherein the flowmeter is an electromagnetic flowmeter with a pressure of 40 MPa.
4. The automatic diversion and pressurization device without stopping the pump during the stand column and the drill taking-out of the drill string according to claim 1, wherein the automatic diversion and pressurization device further comprises a key control module which is remotely connected with the second flat plate valve, the fourth flat plate valve, the sixth flat plate valve and the throttle valve respectively.
5. The automatic diversion and pressure compensation device without stopping the pump during the stand column and the drill-up according to any one of claims 1 to 4, wherein the automatic diversion and pressure compensation device further comprises a real-time monitoring unit capable of collecting and displaying the states of all the flat valves and the throttle valves and the flowmeter indication in real time.
6. An oil and gas field pressure control drilling operation system, comprising a stand column, a drilling pump and a circulating tank, and is characterized in that the oil and gas field pressure control drilling operation system further comprises the stand column connection and automatic diversion pressure compensation device without stopping the pump during the drilling period according to any one of claims 1-5.
7. An automatic diversion pressure supplementing method without stopping a pump during stand column connection and drill taking, which is characterized in that the automatic diversion pressure supplementing method is realized by using the oil-gas field pressure control drilling operation system according to claim 6.
8. The automatic diversion pressure compensation method without stopping the pump during the stand column connection and the drill taking-up of claim 7, wherein the automatic diversion pressure compensation method is characterized in that the first flat valve, the third flat valve and the fifth flat valve are set to be in a normally open state, the eighth flat valve is set to be in a normally closed state, and the second flat valve is opened or closed to realize the conduction or the closing of the first pipeline; opening a fourth flat valve, then opening a throttle valve, and then closing a second flat valve to realize the conduction of a second pipeline; the third pipeline is conducted by closing the second flat valve and then opening the sixth flat valve.
9. An automatic diversion pressure supplementing method without stopping a pump during stand column connection and drill lifting, which is characterized in that the automatic diversion pressure supplementing method is realized by adopting the automatic diversion pressure supplementing device as claimed in claim 1, and the first flat valve, the third flat valve and the fifth flat valve are set to be in a normally open state, and the method comprises the following steps:
During the normal circulation of the drilling process, opening the second plate valve, and closing the fourth plate valve, the sixth plate valve and the throttle valve to allow drilling fluid to enter the riser via the first line;
then, under the condition that the sixth flat valve is kept in a closed state all the time in the ground circulation flow of the vertical column connection and the drilling process, the fourth flat valve is opened, the throttle valve is opened, and then the second flat valve is closed, so that drilling fluid enters the throttle manifold to realize pressure compensation;
Then, in the pressure relief flow, opening a sixth flat valve, and closing the sixth flat valve after relieving the pressure of the vertical pipe to 0;
next, the process of returning to the next normal cycle flow is entered, the second flapper valve is opened, the throttle valve is closed, and the fourth flapper valve is closed.
10. The method for automatic diversion and pressurization without stopping the pump during the drilling of the vertical column according to claim 9, wherein the throttle valve is opened or closed in a slow opening or slow closing mode respectively.
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| CN202111363261.6A CN114635656B (en) | 2021-11-17 | 2021-11-17 | Automatic diversion pressure supplementing device and method without stopping pump during stand column connection and drill lifting |
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