CN113250643B - Control method of dynamic well killing underground intelligent packer - Google Patents
Control method of dynamic well killing underground intelligent packer Download PDFInfo
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- CN113250643B CN113250643B CN202110694933.5A CN202110694933A CN113250643B CN 113250643 B CN113250643 B CN 113250643B CN 202110694933 A CN202110694933 A CN 202110694933A CN 113250643 B CN113250643 B CN 113250643B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005553 drilling Methods 0.000 claims abstract description 47
- 230000009545 invasion Effects 0.000 claims description 59
- 238000012856 packing Methods 0.000 claims description 38
- 238000012806 monitoring device Methods 0.000 claims description 27
- 239000012530 fluid Substances 0.000 claims description 24
- 238000012544 monitoring process Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- 238000005192 partition Methods 0.000 description 9
- 230000001276 controlling effect Effects 0.000 description 7
- 230000033228 biological regulation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000007423 decrease Effects 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
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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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or 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
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
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- Mining & Mineral Resources (AREA)
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to the technical field of oil and gas drilling, and particularly discloses a control method of a dynamic kill underground intelligent packer.
Description
Technical Field
The invention belongs to the field of oil and gas drilling, and particularly relates to a control method of a dynamic well killing underground intelligent packer.
Background
The early control of gas cut overflow is one of the keys for preventing major accidents such as blowout, and the conventional ground well control mode has the characteristics of long well control period, high cost, large risk and the like. In recent years, people gradually change the focus of well control from the ground to the downhole, for example, patent documents with patent numbers of US4712613A, US4367794A, CN201510231254.9, CN201811217299.0 and CN201420779882.1 propose downhole blowout preventer devices with different structures and control modes, and usually adopt the modes of lifting and rotating a drill string, throwing balls, electrically controlled valves and the like to control the downhole blowout preventer, so as to achieve the purpose of sealing the well bore annulus. Through analysis, the current downhole packer only has two states of normal drilling and complete packing, mostly needs manual intervention (ground signal sending or mechanical action) to carry out state conversion, and cannot carry out real-time intelligent linkage with downhole related monitoring data. On the other hand, once the downhole blowout preventer proposed at present is completely sealed, drilling cannot be continued, and the problem of 'one-cutting' exists for the conditions of medium and small gas invasion or overflow degree, so in the prior art, a patent document with the patent number of CN202110045388.7 discloses a basic method for realizing dynamic control of downhole gas invasion or overflow by dynamically regulating and controlling the opening of a downhole packer, but the structure and the working principle of the dynamic packer are not specifically designed. Therefore, a set of dynamic kill downhole intelligent packer capable of intelligently regulating and controlling packing degree according to gas invasion or overflow degree needs to be developed, dynamic kill drilling under different gas invasion or overflow amount conditions is realized, and drilling safety and efficiency can be greatly improved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a control method of a dynamic well killing underground intelligent packer, which utilizes the automatic matching of a plurality of valves, regulates and controls the opening of the packer in real time according to the monitoring data of gas invasion and overflow degree, and realizes the drilling dynamic well killing by dynamically controlling the annular pressure drop.
The utility model provides a developments kill-job intelligence packer in pit, is including packing rubber, inner tube, packing rubber cladding in the outside of inner tube, just the lateral wall of packing rubber and inner tube between form inclosed pressure storehouse, the pressure storehouse be connected through the inner chamber of check valve with the inner tube, the entry of check valve and the inner chamber intercommunication of inner tube, the export and the pressure storehouse intercommunication of check valve, the check valve only allow liquid to flow to the pressure storehouse from the inner tube inner chamber, the pressure storehouse pass through the outside of relief valve and pressure storehouse and be connected, the inner tube in be provided with the valve, just the valve set up in the downside of check valve.
The valve is an electrodeless regulation and control valve.
The side wall of the inner pipe is provided with a bypass valve communicated with the outside, and the bypass valve is arranged above the packing rubber.
An elastic partition plate is arranged between the packing rubber and the side wall of the inner tube, and the pressure bin is positioned between the elastic partition plate and the side wall of the inner tube.
The outer side of the inner pipe is provided with a first pressure sensor and a second pressure sensor, the first pressure sensor is arranged above the packing rubber, and the second pressure sensor is arranged below the packing rubber.
The inner wall of the inner pipe is provided with an opening, and the opening communicates the check valve with the inner cavity of the inner pipe.
A control method of dynamic well killing down-hole intelligent packer, the used device includes a dynamic well killing down-hole intelligent packer and gas invasion and overflow monitoring device, the gas invasion and overflow monitoring device is set above the dynamic well killing down-hole intelligent packer, the control method includes,
normal drilling: at the moment, the valve is completely opened, and the pressure release valve is closed;
(II) dynamic well killing drilling: if monitoring signals from the gas invasion and overflow monitoring device are received, the occurrence of medium and small degree gas invasion or overflow is prompted, and at the moment, the valve reduces the opening phi of the valve0Under the action of the valve, the drilling fluid flows into the pressure bin through the one-way valve to cause the packing rubber to expand, and the opening degree of the packer is K at the moment1In this case, the following cases are classified,
the condition is that the annular fluid pressure at the lower part of the packer is more than or equal to the formation pore pressure: if the gas invasion or overflow cannot be monitored by the gas invasion or overflow monitoring device, the opening of the packer is K1The situation of (1) continues to be safeFully drilling;
case two, annular fluid pressure below the packer < formation pore pressure: the gas invasion and overflow monitoring device can also monitor gas invasion or overflow, the valve reduces the opening of the valve step by step according to the step length of delta phi, after the opening of the valve is reduced each time, the monitoring result of the gas invasion and overflow monitoring device is read, until the opening of the valve is reduced n times, the gas invasion and overflow monitoring device cannot monitor the gas invasion or overflow, and the opening of the valve is reduced at the moment by phi1=φ0+ n delta phi, the opening of the packer is K2When the opening of the packer is K2In the case of which safe drilling continues.
Furthermore, a bypass valve communicated with the outside is arranged on the side wall of an inner pipe of the dynamic kill downhole intelligent packer, the bypass valve is arranged above packing rubber, a first pressure sensor and a second pressure sensor are arranged on the outside of the inner pipe, the first pressure sensor is arranged above the packing rubber, the second pressure sensor is arranged below the packing rubber, the control method also comprises the following steps,
and (III) stopping drilling and killing the well: monitoring large degree gas invasion or overflow by gas invasion and overflow monitoring device, or controlling phi in the second condition1＞φgTime phigThe method for stopping drilling and killing the well for reducing the opening degree of the valve to the preset maximum comprises the following steps,
and 4, observing the pressure value of the second pressure sensor until the pressure value of the second pressure sensor is not increased any more, and recording the pressure value P of the second pressure sensor at the moment2；
The effect provided in the summary of the invention is only the effect of the embodiment, not all the effects of the invention, and one of the above technical solutions has the following advantages or beneficial effects:
1. the invention can realize automatic regulation and control of the expansion degree of the pressure bin through the matching of the valve, the one-way valve and the pressure release valve, realize that the packer can intelligently and dynamically regulate and control the opening degree of the packer according to the gas invasion or overflow degree by only depending on the energy of drilling fluid, and regulate and control the bottom hole pressure by utilizing the pressure drop generated by the packers with different opening degrees, thereby effectively controlling the gas invasion or overflow with small degree in the drilling process and realizing dynamic killing drilling.
2. According to the invention, through the mutual cooperation of the valves, the one-way valve, the pressure release valve and the bypass valve and the real-time monitoring of the first pressure sensor and the second pressure sensor, when the gas invasion or overflow amount is large and the pressure drop of a packer is not enough for dynamic well killing, the annular space and a flow channel in a drill column can be completely sealed, and a safe circulation and well killing passage is constructed by opening the bypass valve. After the well killing fluid is in place, the pressure relief valve is opened, the packer is automatically contracted and closed by virtue of the pretightening force of the packing rubber, and normal circulating drilling is recovered.
Drawings
FIG. 1 is a cross-sectional structural view of the present invention;
FIG. 2 is a schematic diagram of the operation of the present invention;
in the figure, packing rubber 1, an elastic partition plate 2, a pressure bin 3, a valve 4, an opening 5, a one-way valve 6, a pressure release valve 7, a first pressure sensor 8, a second pressure sensor 9, a bypass valve 10, a gas invasion and overflow monitoring device 11, an inner pipe 12, a well wall 13 and a drill string 14.
Detailed Description
In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and procedures are omitted so as to not unnecessarily limit the invention.
As shown in figure 1, the dynamic kill downhole intelligent packer comprises packing rubber 1, an inner tube 12 and a valve 4, wherein the upper end of the inner tube 12 is connected with a drill string 14, the outer sides of the drill string 14 and the inner tube 12 are a well wall 13, an annular space is formed between the outer sides of the drill string 14 and the inner tube 12 and the well wall 13, the liquid pressure in the drill string 14 with the same section in the downhole is generally about 5-8 MPa higher than the liquid pressure in the annular space, the packing rubber 1 is coated on the outer side of the inner tube 12, a sealed pressure chamber 3 is formed between the packing rubber 1 and the side wall of the inner tube 12, an elastic partition plate 2 is arranged between the packing rubber 1 and the side wall of the inner tube 12, and the pressure chamber 3 is located between the elastic partition plate 2 and the side wall of the inner tube 12. The pressure bin 3 is an annular cavity, the packing rubber 1 is made of elastic rubber, the pretightening force is not linear and is not large enough, the pretightening force is increased and regulated by adding the elastic partition plate 2, the packing rubber 1 and the elastic partition plate 2 both have certain elasticity to provide the pretightening force of more than 5-10 MPa for the pressure bin 3, the pretightening force is increased along with the increase of the inner cavity of the pressure bin 3, the pressure bin 3 is connected with the inner cavity of the inner tube 12 through the one-way valve 6, the inlet of the one-way valve 6 is communicated with the inner cavity of the inner tube 12, the outlet of the one-way valve 6 is communicated with the pressure bin 3, the one-way valve 6 only allows liquid to flow from the inner cavity of the inner tube 12 to the pressure bin 3, the inner wall of the inner tube 12 is provided with an opening 5, and the opening 5 communicates the one-way valve 6 with the inner cavity of the inner tube 12, pressure chamber 3 pass through the outside of relief valve 7 with pressure chamber 3 and be connected, in the liquid accessible relief valve 7 discharge to the annular space in the pressure chamber 3 promptly, valve 4 set up in inner tube 12, valve 4 be electrodeless regulation and control valve, the radius of passing through of the controllable inner tube 12 internal liquid of valve 4, just valve 4 set up in the downside of check valve 6.
In a more preferred embodiment, a bypass valve 10 is provided on the side wall of the inner pipe 12 to communicate with the outside, that is, the inner pipe 12 and the annulus communicate with each other through the bypass valve 10, and the bypass valve 10 is provided above the packing rubber 1.
As a more preferable embodiment, a first pressure sensor 8 and a second pressure sensor 9 are arranged outside the inner pipe 12, the first pressure sensor 8 is arranged above the packing rubber 1, the second pressure sensor 9 is arranged below the packing rubber 1, and the pressure in the annulus above the packer and the pressure in the annulus below the packer are respectively monitored by the first pressure sensor 8 and the second pressure sensor 9.
A control method of a dynamic well killing underground intelligent packer, the used device comprises a dynamic well killing underground intelligent packer and a gas invasion and overflow monitoring device 11, the gas invasion and overflow monitoring device 11 is the prior art, for example, a patent document with the patent number of CN202010645424.9 discloses a gas invasion detection device and a detection method while drilling, a patent document with the patent number of CN202110045388.7 discloses a well drilling underground gas invasion monitoring and intelligent well control system, the gas invasion and overflow monitoring device 11 is arranged above the dynamic well killing underground intelligent packer, the control method comprises,
normal drilling: at the moment, the valve 4 is completely opened, the relief valve 7 is closed, under the action of the pre-tightening force of the packing rubber 1, the pressure in the pressure bin 3 is greater than the pressure at the inlet of the one-way valve 6 in the inner pipe 12, the drilling fluid in the drill string 14 and the inner pipe 12 cannot flow into the pressure bin 3, so that the packer is in an unopened state, and the drilling fluid normally circulates along the drill string 14 and the annulus, as shown in fig. 2 a;
(II) dynamic well killing drilling: as shown in fig. 2b, if receiving the monitoring signal from the gas invasion and overflow monitoring device 11, it is indicated that the gas invasion or overflow occurs to a small or medium extent, which relates to the monitoring problem of gas invasion and overflow, and is not related to the present invention, and this is a leading stripMember, at which time the valve 4 decreases the valve opening phi0，φ0Different levels can be preset according to the monitored gas invasion and overflow degree, for example, the gas content is 1 percent corresponding to phi0=20%, gas content 5% corresponds to phi0=40%, under the action of the valve 4, a pressure build-up is generated in the inner pipe 12 above the valve 4, namely, the pressure in the inner pipe 12 above the valve 4 is higher than the pressure in the inner pipe 12 below the valve 4, so that the pressure at the position of the opening 5 is increased, when the pressure at the position of the opening 5 is higher than the pressure in the pressure bin 3, the drilling fluid flows into the pressure bin 3 through the one-way valve 6, the packing rubber 1 and the elastic partition plate 2 are caused to expand until the pressures at the positions of the pressure bin 3 and the opening 5 are the same, and the opening degree of the packer is K at the moment1Since the packer is opened to a certain extent, the flow resistance in the annulus increases, thereby increasing the pressure of the annulus fluid in the lower portion of the packer and correspondingly increasing the surface pump pressure, which is divided into the following cases,
the condition is that the annular fluid pressure at the lower part of the packer is more than or equal to the formation pore pressure: the gas invasion and overflow monitoring device 11 cannot monitor the gas invasion or overflow and indicates the opening K of the packer1The induced downhole pressure increase can successfully control gas invasion or overflow, and the opening degree of the packer is K1The safe drilling is continued;
case two, annular fluid pressure below the packer < formation pore pressure: the gas invasion and overflow monitoring device 11 can also monitor gas invasion or overflow, but the gas invasion or overflow degree is reduced, the valve 4 reduces the valve opening degree step by step according to the step length of delta phi, the delta phi can be preset to be 10%, after the valve opening degree is reduced each time, the monitoring result of the gas invasion and overflow monitoring device 11 is read, until the valve opening degree is reduced n times, the gas invasion and overflow monitoring device 11 cannot monitor the gas invasion or overflow, at the moment, the valve opening degree phi is reduced1=φ0+ n delta phi, the opening of the packer is K2When the opening of the packer is K2In the case of which safe drilling continues.
As another embodiment, a bypass valve 10 communicated with the outside is arranged on the side wall of an inner pipe 12 of the dynamic kill-well downhole intelligent packer, the bypass valve 10 is arranged above the packing rubber 1, a first pressure sensor 8 and a second pressure sensor 9 are arranged on the outside of the inner pipe 12, the first pressure sensor 8 is arranged above the packing rubber 1, the second pressure sensor 9 is arranged below the packing rubber 1, the control method further comprises,
and (III) stopping drilling and killing the well: the gas invasion and overflow monitoring device 11 monitors the gas invasion or overflow to a greater degree or phi in the case of the control method (II)1＞φgTime phigFor a predetermined maximum reduction in the valve opening, phigGenerally about 80 percent of the pressure difference generated by a packer is not enough to implement dynamic well killing, and the drilling stopping and well killing are carried out, comprising the following steps,
and 4, forming a closed space by an annular space at the lower part of the packer, continuously increasing the pressure in the closed space along with the continuous invasion of gas invasion or overflow until the pressure is balanced with the pore pressure of the stratum, completing the underground safe well killing, observing the pressure value of the second pressure sensor 9, and recording the pressure value P of the second pressure sensor 9 at the moment until the pressure value of the second pressure sensor 9 is not increased any more2And the information is uploaded to the ground in a well information transmission mode mature in the prior art;
Although the embodiments of the present invention have been described with reference to the accompanying drawings, the scope of the present invention is not limited thereto, and various modifications and variations which do not require inventive efforts and which are made by those skilled in the art are within the scope of the present invention.
Claims (2)
1. A control method of a dynamic kill underground intelligent packer is characterized in that the used device comprises a dynamic kill underground intelligent packer and a gas invasion and overflow monitoring device (11), the dynamic kill underground intelligent packer comprises packing rubber (1) and an inner pipe (12), the packing rubber (1) is coated on the outer side of the inner pipe (12), a closed pressure bin (3) is formed between the packing rubber (1) and the side wall of the inner pipe (12), the pressure bin (3) is connected with the inner cavity of the inner pipe (12) through a one-way valve (6), the one-way valve (6) only allows liquid to flow from the inner cavity of the inner pipe (12) to the pressure bin (3), the pressure bin (3) is connected with the outer side of the pressure bin (3) through a pressure release valve (7), a valve (4) is arranged in the inner pipe (12), the valve (4) is arranged at the lower side of the one-way valve (6), the gas invasion and overflow monitoring device (11) is arranged above a dynamic kill underground intelligent packer, the control method comprises the following steps,
normal drilling: the gas invasion and overflow monitoring device (11) does not monitor gas invasion or overflow, at the moment, the valve (4) is completely opened, and the pressure release valve (7) is closed;
(II) dynamic well killing drilling: if monitoring signals from the gas invasion and overflow monitoring device (11) are received, the occurrence of medium and small degree gas invasion or overflow is prompted, and the valve (4) is reduced at the momentOpening phi of door0Under the action of the valve (4), drilling fluid flows into the pressure bin (3) through the one-way valve (6) to cause the packing rubber (1) to expand, and the opening degree of the packer is K at the moment1In this case, the following cases are classified,
the condition is that the annular fluid pressure at the lower part of the packer is more than or equal to the formation pore pressure: the gas invasion and overflow monitoring device (11) cannot monitor gas invasion or overflow, and the opening degree of the packer is K1The safe drilling is continued;
case two, annular fluid pressure below the packer < formation pore pressure: the gas invasion and overflow monitoring device (11) can also monitor gas invasion or overflow, the valve (4) gradually reduces the opening of the valve according to the step length of delta phi, the monitoring result of the gas invasion and overflow monitoring device (11) is read after the opening of the valve is reduced each time, the gas invasion and overflow monitoring device (11) cannot monitor the gas invasion or overflow until the opening of the valve is reduced for n times, and the opening of the valve is reduced to phi at the moment1=φ0+ n delta phi, the opening of the packer is K2When the opening of the packer is K2In the case of which safe drilling continues.
2. The control method of the intelligent packer under the dynamic well killing well according to the claim 1, characterized in that, the side wall of the inner pipe (12) of the intelligent packer under the dynamic well killing well is provided with a bypass valve (10) communicated with the outside, the bypass valve (10) is arranged above the packing rubber (1), the outside of the inner pipe (12) is provided with a first pressure sensor (8) and a second pressure sensor (9), the first pressure sensor (8) is arranged above the packing rubber (1), the second pressure sensor (9) is arranged below the packing rubber (1), the control method also comprises,
and (III) stopping drilling and killing the well: the gas invasion and overflow monitoring device (11) monitors the gas invasion or overflow to a greater degree, or phi in the condition of the control method (II)1＞φgTime phigThe method for stopping drilling and killing the well for reducing the opening degree of the valve to the preset maximum comprises the following steps,
step 1, completely closing a valve (4);
step 2, when the pumping pressure is observed to rise rapidly on the ground and the annular return flow rate is reduced to 0 temporarily, stopping drilling and preparing for killing construction;
step 3, controlling to open a bypass valve (10);
step 4, observing the pressure value of the second pressure sensor (9), and recording the pressure value P of the second pressure sensor (9) at the moment until the pressure value of the second pressure sensor (9) is not increased any more2；
Step 5, according to P2The well killing fluid is configured and injected into the well to circulate along the drill string until the pressure value P monitored by the first pressure sensor (8)1And P2Satisfy P1-P2When the pressure is larger than or equal to the delta P, the delta P is a preset numerical value, the bypass valve (10) is closed, the valve (4) is opened, the pressure relief valve (7) is opened until drilling fluid in the pressure bin (3) is discharged, then the pressure relief valve (7) is closed, and safe drilling is continued.
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| US7096976B2 (en) * | 1999-11-05 | 2006-08-29 | Halliburton Energy Services, Inc. | Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| NO325521B1 (en) * | 2006-11-23 | 2008-06-02 | Statoil Asa | Assembly for pressure control during drilling and method for pressure control during drilling in a formation with unforeseen high formation pressure |
| CN109162663B (en) * | 2018-10-18 | 2021-09-28 | 西南石油大学 | Conical valve type automatic downhole blowout preventer device and using method |
| CN111255443B (en) * | 2020-02-20 | 2023-07-25 | 中国石油大学(华东) | Underground gas invasion intelligent control system |
| CN112360439B (en) * | 2021-01-14 | 2021-03-23 | 中国石油大学(华东) | Drilling underground gas invasion monitoring and intelligent well control system and implementation method |
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Effective date of registration: 20231009 Address after: 257000 No. two, 271 North Road, Shandong, Dongying Patentee after: CHINA University OF PETROLEUM (EAST CHINA) Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: Sinopec Petroleum Engineering Technology Research Institute Co.,Ltd. Address before: 257061 No. 739, North Road, Dongying District, Shandong, Dongying Patentee before: CHINA University OF PETROLEUM (EAST CHINA) |
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