CN112324384A - Non-well killing operation process method applying pressure control switch valve - Google Patents
Non-well killing operation process method applying pressure control switch valve Download PDFInfo
- Publication number
- CN112324384A CN112324384A CN202011377816.8A CN202011377816A CN112324384A CN 112324384 A CN112324384 A CN 112324384A CN 202011377816 A CN202011377816 A CN 202011377816A CN 112324384 A CN112324384 A CN 112324384A
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- Prior art keywords
- pressure
- switch valve
- well
- oil
- controlled switch
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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
- 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
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
Abstract
The invention discloses a non-killing operation process method applying a pressure-controlled switch valve, which is suitable for a non-flowing well completion process after optical casing volume fracturing open flow. And (3) under the state that the wellhead is pressurized, setting a coiled tubing tool string: the method comprises the following steps that (1) a continuous oil pipe, a rivet connector, a check valve, a safety joint, a centralizer, a setting tool, a through hole bridge plug, a sliding sleeve valve, a pressure control switch valve, a tail pipe and a plug are arranged, and a shaft is sealed after the through hole bridge plug is set; after the switching state of the pressure-controlled switch valve is verified to be normal through two times of pressing of the cement truck, after a conventional oil well completion process of a lower oil well pump is adopted, pressing is carried out through the cement truck, and an oil extraction production process is carried out after the pressure-controlled switch valve is opened; after oil extraction is carried out for a period of time, the sliding sleeve valve can be opened by pressing the cement truck into the shaft. The invention closes the pressure-controlled switch valve by pressing the cement truck and then temporarily closes the oil layer, so that the well mouth is in a safe and controlled protection state, the well control hydraulic well can be avoided, the oil layer is not polluted by well control fluid, the construction cost is low, the period is short, and the well control risk is small.
Description
Technical Field
The invention relates to the field of oil and gas field development operation, in particular to a non-killing operation process method applying a pressure-controlled switch valve.
Background
At present, after fracturing and blowout of low-permeability oil reservoirs such as shale oil, the conventional well completion process firstly performs well killing through a coiled tubing, and after the well killing is completed, a workover rig is used for performing well completion operation. On one hand, the adoption of the well killing hydraulic well can cause pollution to an oil layer and reduce the fracturing effect; on the other hand, the pump-down well completion adopting the pressurized operation device has the limitations of higher cost, longer construction period and incapability of pump-down well completion operation.
Disclosure of Invention
The invention aims to make up the defects of the prior art and provides a non-killing operation process method applying a pressure control switch valve, by using the method, an oil layer can be temporarily closed after a tool string is put in, so that a well head is in a safe and controlled protection state, a well killing hydraulic well can be avoided, the oil layer is not polluted by well killing fluid, the construction cost is low, the period is short, and the well control risk is small; the method is not only suitable for the sucker-rod pump well completion process, but also suitable for the electric pump well completion process, and has the characteristic of wide application range.
In order to solve the technical problems, the invention adopts the following technical scheme:
a non-well killing operation process method applying a pressure control switch valve comprises the following steps:
1) carrying out sand washing, well dredging, scraping and hot well washing operations by using a coiled tubing;
2) and (3) under the state that the wellhead is pressurized, setting a coiled tubing tool string: the method comprises the following steps of (1) connecting a continuous oil pipe, a rivet connector, a check valve, a safety joint, a centralizer, a setting tool, a through hole bridge plug, a sliding sleeve valve, a pressure control switch valve, a tail pipe and a plug;
3) loading a cement truck, positively pressurizing by 20MPa through the coiled tubing, setting the through hole bridge plug and releasing the hand, lifting the coiled tubing tool string, and lowering the coiled tubing to re-probe the through hole bridge plug;
4) after the position of the bridge plug of the through hole is retested, lifting the continuous oil pipe tool string; opening a casing gate, observing the overflow condition to verify the sealing condition of the casing, and if no overflow display exists, indicating that the setting condition of the through hole bridge plug is good;
5) and (4) closing the casing gate, positively pressurizing the cement truck to 20MPa through the continuous oil pipe, stabilizing the pressure for 5min, and then decompressing the cement truck to 0.
6) Opening the casing gate, observing the overflow condition to verify whether the pressure-controlled switch valve is opened, if the overflow is displayed and the overflow is continuously stable, indicating that the opening state of the pressure-controlled switch valve is good, and then closing the casing gate;
7) continuously pressurizing the cement truck to 20MPa through the continuous oil pipe, stabilizing the pressure for 5min, and then decompressing the cement truck to 0;
8) opening the casing gate, observing the overflow condition to verify whether the pressure-controlled switch valve is closed, and if no overflow display exists and no overflow display continues, indicating that the closing state of the pressure-controlled switch valve is good; completing a construction process of temporarily closing the oil layer once, and then closing the casing gate;
9) lifting the coiled tubing and removing coiled tubing equipment; the upper workover rig is put into the oil well pump through the oil pipe;
10) opening a casing gate, pressurizing the shaft by a cement truck at 20MPa for 5min, then decompressing the shaft to 0 by the cement truck, opening a pressure-controlled switch valve, and handing over to the well after the trial pumping is qualified;
11) after oil extraction is carried out for a period of time, the cement truck is used for pressurizing the shaft for 5min under the pressure of 30MPa, then the cement truck is depressurized to 0, and the sliding sleeve valve can be opened by sliding the sleeve shearing pin, so that oil extraction operation is continued.
Further, the well head is a 130 large-drift diameter well head.
Further, the tail pipe contains a screen.
Furthermore, the pressure control switch valve is a pressure control switch valve which can be opened or closed repeatedly by pressing, and can realize automatic opening or closing of an oil sleeve communication channel and effective sealing of a production oil layer, so that safe and effective control of a wellhead is realized.
Further, the oil well pump comprises a rod pump and a rodless pump.
Compared with the prior art, the invention has the beneficial effects that: the method can avoid the well killing hydraulic well, the oil layer is not polluted by the well killing fluid, the construction cost is low, the period is short, the well control risk is small, and the method is not only suitable for the rod pump well completion process, but also suitable for the electric pump well completion process; when the pump is detected in the later stage, the pressure-controlled switch valve temporarily closes the oil layer, and the oil layer is well isolated and protected.
Detailed Description
The foregoing summary of the invention is described in further detail below with reference to specific embodiments.
Example (b): a no-killing operation process method applying a pressure control switch valve comprises the following specific steps:
(1) on the basis of a 130/105MPa large-drift-diameter wellhead gate of a wellhead, a 2-inch coiled tubing bottom belt is used for washing a sand detecting surface, 3% KCL solution is used for positively circulating sand washing at a discharge capacity of 0.4-0.6 square/minute until the properties of an inlet and an outlet are consistent, and then the coiled tubing is taken out. And then, a well dredging gauge with the bottom belt of the connecting oil pipe phi of 114 multiplied by 2m is downwards conveyed to the bottom of the artificial well at the speed of 15 m/min, the pressure is not more than 30KN when the pressure is applied on the well dredging gauge, the coiled tubing is taken out of the well dredging gauge and then is checked, if the well dredging gauge is normal, the scraper of the bottom belt of the coiled tubing is downwards conveyed again at the speed of 15 m/min, and the setting position of the bridge plug of the through hole is repeatedly scraped. After the coiled tubing is pulled out and the scraper is taken out, the whole well casing is tested to 80% of the internal pressure resistance value of the casing, and the next step is carried out after the pressure test is qualified.
(2) Go up the cement truck, pass through 50m for coiled tubing3And (4) hot water positive circulation hot washing the well until the liquid properties of an inlet and an outlet are consistent, washing out the thickened oil in the well, and then pulling out the coiled tubing.
(3) When the pressure of the well head is below 5MPa, a coiled tubing tool string is put in: the method comprises the steps of coiled tubing, a rivet connector, a check valve, a safety joint, a centralizer, a setting tool, a through hole bridge plug, a sliding sleeve valve, a pressure control switch valve, a tail pipe (including a sieve pipe) and a plug.
(4) And (3) closing the casing valve, positively pressurizing the cement truck by 20MPa through the coiled tubing, setting the through hole bridge plug and releasing the hand, and if the pressure of the cement truck suddenly drops, indicating that the setting tool and the through hole bridge plug are successfully released. And lifting the coiled tubing tool string for 20 meters, lowering the coiled tubing to retest the through hole bridge plug, and if the through hole bridge plug is blocked, displaying that the through hole bridge plug is completely set. After the coiled tubing is lifted up and leaves the through hole bridge plug for 50 meters, the casing gate is opened, and the overflow condition is observed to verify the sealing condition of the casing. If no overflow is displayed, the through hole bridge plug is well set.
(5) And (3) closing the sleeve valve, positively pressurizing the cement truck to 20MPa through the continuous oil pipe, observing for 5min, and releasing the pressure of the cement truck to 0 after the pressure drop is less than 0.7 MPa.
(6) And opening the casing gate, and observing the overflow condition for 30min to verify whether the pressure-controlled switch valve is opened. If the overflow is displayed and the continuous overflow is stable, the opening state of the pressure-controlled switch valve is good. The sleeve gate is then closed.
(7) And continuously pressurizing the cement truck to 20MPa through the continuous oil pipe, stabilizing the pressure for 5min, and releasing the pressure of the cement truck to 0 after the pressure drop is less than 0.7 MPa.
(8) And opening the casing valve, and observing the overflow condition for 30min to verify whether the pressure-controlled switch valve is closed and the oil jacket is closed. If the overflow display is not available and the overflow display is continuously available, the closing state of the pressure-controlled switch valve is good, and the oil sleeve is closed. Thus, the construction process of temporarily closing the oil layer is completed. The sleeve gate is then closed.
(9) And (3) pulling out the coiled tubing, removing coiled tubing equipment, loading a workover rig, installing a blowout preventer, testing the pressure of a wellhead, assembling an oil pipe hanger, short joints and other tools.
(10) And (3) putting the combination of the tubular pump and the pump rod into the oil pipe, putting the piston into the bottom of the pump cylinder after the trial pumping is qualified, and reversely buckling 1 pump rod on the uppermost part.
(11) The depth of the pipe column is adjusted at the wellhead through the oil pipe nipple, the oil pipe is clamped by the elevator to sit on the large four-way joint, the upper end of the oil pipe is connected with the oil pipe hanger, the elevator is withdrawn, the oil pipe hanger is seated in the large four-way joint, and the blowout preventer is disassembled.
(12) And hanging the 350-type Christmas tree, putting the pump rod into the tree to be buckled, lifting the tree to be buckled again, and putting the pump rod short section and the polished rod into the tree. And (3) opening the casing gate, pressurizing the shaft for 5min at 20MPa by the cement truck, and then depressurizing the cement truck to 0, so that the pressure-controlled switch valve can be opened.
(13) And connecting a pressure gauge to one side of the 350-type Christmas tree, closing the casing gate, and handing over the well after the trial pumping is qualified at 5 MPa.
(14) After oil extraction is carried out for a long time, if the yield is reduced, the casing gate can be opened, the cement truck is used for pressurizing the shaft for 5min under the pressure of 30MPa, then the pressure of the cement truck is relieved to 0, and the sliding sleeve valve can be opened by sliding the sleeve shearing pin, so that oil extraction operation is continued.
In summary, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can propose other embodiments within the technical teaching of the present invention, but these embodiments are included in the scope of the present invention.
Claims (5)
1. A snubbing serving process method applying a pressure-controlled switch valve is characterized by comprising the following steps:
1) carrying out sand washing, well dredging, scraping and hot well washing operations by using a coiled tubing;
2) and (3) under the state that the wellhead is pressurized, setting a coiled tubing tool string: the method comprises the following steps of (1) connecting a continuous oil pipe, a rivet connector, a check valve, a safety joint, a centralizer, a setting tool, a through hole bridge plug, a sliding sleeve valve, a pressure control switch valve, a tail pipe and a plug;
3) loading a cement truck, positively pressurizing by 20MPa through the coiled tubing, setting the through hole bridge plug and releasing the hand, lifting the coiled tubing tool string, and lowering the coiled tubing to re-probe the through hole bridge plug;
4) after the position of the bridge plug of the through hole is retested, lifting the continuous oil pipe tool string; opening a casing gate, observing the overflow condition to verify the sealing condition of the casing, and if no overflow display exists, indicating that the setting condition of the through hole bridge plug is good;
5) and (4) closing the casing gate, positively pressurizing the cement truck to 20MPa through the continuous oil pipe, stabilizing the pressure for 5min, and then decompressing the cement truck to 0.
6) Opening the casing gate, observing the overflow condition to verify whether the pressure-controlled switch valve is opened, if the overflow is displayed and the overflow is continuously stable, indicating that the opening state of the pressure-controlled switch valve is good, and then closing the casing gate;
7) continuously pressurizing the cement truck to 20MPa through the continuous oil pipe, stabilizing the pressure for 5min, and then decompressing the cement truck to 0;
8) opening the casing gate, observing the overflow condition to verify whether the pressure-controlled switch valve is closed, and if no overflow display exists and no overflow display continues, indicating that the closing state of the pressure-controlled switch valve is good; completing a construction process of temporarily closing the oil layer once, and then closing the casing gate;
9) lifting the coiled tubing and removing coiled tubing equipment; the upper workover rig is put into the oil well pump through the oil pipe;
10) opening a casing gate, pressurizing the shaft by a cement truck at 20MPa for 5min, then decompressing the shaft to 0 by the cement truck, opening a pressure-controlled switch valve, and handing over to the well after the trial pumping is qualified;
11) after oil extraction is carried out for a period of time, the cement truck is used for pressurizing the shaft for 5min under the pressure of 30MPa, then the cement truck is depressurized to 0, and the sliding sleeve valve can be opened by sliding the sleeve shearing pin, so that oil extraction operation is continued.
2. The method of claim 1, wherein the wellhead is a 130 gauge wellhead.
3. The method of claim 1, wherein the liner comprises a screen.
4. The method as claimed in claim 1, wherein the pressure-controlled switch valve is a pressure-controlled switch valve which can be opened or closed repeatedly by pressing, and can automatically open or close the oil jacket communication channel to effectively seal the oil production layer, thereby realizing safe and effective control of the wellhead.
5. The method as claimed in claim 1, wherein the oil pump comprises a sucker-rod pump and a rodless pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011377816.8A CN112324384B (en) | 2020-11-30 | 2020-11-30 | Non-well killing operation process method applying pressure control switch valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011377816.8A CN112324384B (en) | 2020-11-30 | 2020-11-30 | Non-well killing operation process method applying pressure control switch valve |
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| CN112324384A true CN112324384A (en) | 2021-02-05 |
| CN112324384B CN112324384B (en) | 2022-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011377816.8A Active CN112324384B (en) | 2020-11-30 | 2020-11-30 | Non-well killing operation process method applying pressure control switch valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115012863A (en) * | 2022-06-02 | 2022-09-06 | 中国石油化工股份有限公司 | Method for replacing well head of high-pressure gas well without killing well by using empty well barrel |
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| CN2305482Y (en) * | 1997-04-03 | 1999-01-27 | 徐建 | Hydraulic plug |
| US7290617B2 (en) * | 2004-01-13 | 2007-11-06 | Schlumberger Technology Corporation | Running a completion assembly without killing a well |
| CN102330546A (en) * | 2011-09-30 | 2012-01-25 | 中国石油化工股份有限公司 | Open hole staged fracturing well completion pipe string provided with controllable valve and hydraulic control switching pipe string |
| CN103573230A (en) * | 2012-07-24 | 2014-02-12 | 思达斯易能源技术(集团)有限公司 | Selective mining process and equipment thereof |
| CN207583343U (en) * | 2017-12-13 | 2018-07-06 | 蒋文科 | The safe blowout hookup of oil field well oil pipe Operating Pressure |
| CN111021984A (en) * | 2018-10-09 | 2020-04-17 | 中国石油天然气股份有限公司 | Horizontal well shaft control device |
| CN111305795A (en) * | 2020-03-11 | 2020-06-19 | 中国石油集团渤海钻探工程有限公司 | Method for applying cannula bridge plug lower tube pump |
| CN111561296A (en) * | 2020-04-30 | 2020-08-21 | 中国石油天然气股份有限公司 | Underground switch device and method for controlling pressure in shaft |
-
2020
- 2020-11-30 CN CN202011377816.8A patent/CN112324384B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2305482Y (en) * | 1997-04-03 | 1999-01-27 | 徐建 | Hydraulic plug |
| US7290617B2 (en) * | 2004-01-13 | 2007-11-06 | Schlumberger Technology Corporation | Running a completion assembly without killing a well |
| CN102330546A (en) * | 2011-09-30 | 2012-01-25 | 中国石油化工股份有限公司 | Open hole staged fracturing well completion pipe string provided with controllable valve and hydraulic control switching pipe string |
| CN103573230A (en) * | 2012-07-24 | 2014-02-12 | 思达斯易能源技术(集团)有限公司 | Selective mining process and equipment thereof |
| CN207583343U (en) * | 2017-12-13 | 2018-07-06 | 蒋文科 | The safe blowout hookup of oil field well oil pipe Operating Pressure |
| CN111021984A (en) * | 2018-10-09 | 2020-04-17 | 中国石油天然气股份有限公司 | Horizontal well shaft control device |
| CN111305795A (en) * | 2020-03-11 | 2020-06-19 | 中国石油集团渤海钻探工程有限公司 | Method for applying cannula bridge plug lower tube pump |
| CN111561296A (en) * | 2020-04-30 | 2020-08-21 | 中国石油天然气股份有限公司 | Underground switch device and method for controlling pressure in shaft |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115012863A (en) * | 2022-06-02 | 2022-09-06 | 中国石油化工股份有限公司 | Method for replacing well head of high-pressure gas well without killing well by using empty well barrel |
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| Publication number | Publication date |
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| CN112324384B (en) | 2022-06-10 |
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