CN112727394B - Coiled tubing hydraulic workover string and method - Google Patents
Coiled tubing hydraulic workover string and method Download PDFInfo
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- CN112727394B CN112727394B CN201911043258.9A CN201911043258A CN112727394B CN 112727394 B CN112727394 B CN 112727394B CN 201911043258 A CN201911043258 A CN 201911043258A CN 112727394 B CN112727394 B CN 112727394B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012544 monitoring process Methods 0.000 claims abstract description 37
- 230000008439 repair process Effects 0.000 claims abstract description 29
- 238000004458 analytical method Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 18
- 238000004873 anchoring Methods 0.000 claims description 17
- 210000002445 nipple Anatomy 0.000 claims description 10
- 238000007493 shaping process Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 abstract description 7
- 230000035882 stress Effects 0.000 description 20
- 238000010586 diagram Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000007 visual effect 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
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/10—Reconditioning of well casings, e.g. straightening
-
- 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
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention provides a coiled tubing hydraulic workover string and a method thereof, wherein the coiled tubing hydraulic workover string comprises a ground control device, a coiled tubing and an underground hydraulic repair tool, the coiled tubing is connected with the underground hydraulic repair tool, the ground control device is connected with the underground hydraulic repair tool through a cable arranged in the coiled tubing, the underground hydraulic repair tool repairs an underground casing, monitors the stress condition of the coiled tubing in the repair process, and transmits a monitoring signal to the ground control device through the cable for interpretation and analysis. The coiled tubing hydraulic workover string and the method greatly improve the efficiency and success rate of workover operation by integrating the advantages of 'coiled tubing rapid operation + hydraulic high-efficiency workover technology', are revolutionary innovations of workover operation modes, and have wide application prospects in the field of workover operation of various oil fields.
Description
Technical Field
The invention relates to the technical field of oilfield development, in particular to a coiled tubing hydraulic workover string and a method.
Background
With the continuous deep development of oil fields, production and injection stopping oil-water wells increase year by year, workover is an important means for recovering the production of the oil-water wells, and at present, mechanical workover equipment is mainly adopted for workover, so that the problems of slow pipe string pulling and dropping, poor operating capability under pressure, low equipment aging capability and the like exist. The adopted well repairing technology mainly takes mechanical drilling, grinding and milling technologies as main technologies, and has the advantages of long construction period, multiple links and low efficiency. The problems lead to the difficulty in improving the current workover operation efficiency, long construction period and year-by-year increase of operation cost, and restrict the development of the workover industry. Therefore, a novel coiled tubing hydraulic workover string and a novel coiled tubing hydraulic workover method are invented, and the technical problems are solved.
Disclosure of Invention
The invention aims to provide a coiled tubing hydraulic workover string and a coiled tubing hydraulic workover method which are used for underground operation of an oil-water well and solve the problems of low workover efficiency, low success rate and the like in the prior art.
The object of the invention can be achieved by the following technical measures: coiled tubing hydraulic pressure workover string, this coiled tubing hydraulic pressure workover string includes ground controlling means, coiled tubing and hydraulic repair tools in the pit, this coiled tubing connects in this hydraulic repair tools in the pit, this ground controlling means passes through built-in cable connection in this coiled tubing in this hydraulic repair tools in the pit, this hydraulic repair tools in the pit restores the sleeve pipe in the pit, and monitor this coiled tubing atress condition in the repair process, transmit monitoring signal to this ground controlling means through this cable, explain the analysis.
The object of the invention can also be achieved by the following technical measures:
this hydraulic pressure restoration instrument in pit includes coiled tubing atress monitoring nipple joint, and this coiled tubing atress monitoring nipple joint is connected in this coiled tubing, and this coiled tubing atress condition in the monitoring restoration process is transmitted monitoring signal to this ground control device through this cable, explains the analysis.
The downhole hydraulic repair tool further comprises a connector and a casing anchor tool, the connector connects the coiled tubing and the casing anchor tool, and after the fluid pumped into the coiled tubing from the surface flows through the casing anchor tool, the pressure is increased, and the casing anchor tool works to fix the downhole hydraulic repair tool.
The downhole hydraulic repair tool further comprises a hydraulic boosting tool and a shaper, wherein the shaper is connected to the hydraulic boosting tool, and the hydraulic boosting tool pushes the shaper to shape the deformed casing when the pressure continues to rise after the casing anchoring tool fixes the downhole hydraulic repair tool.
The hydraulic force increasing tool comprises pistons, a central pipe and an outer cylinder, wherein the pistons are arranged on the central pipe, a certain distance is reserved between every two pistons, the pistons and the central pipe are both positioned in the outer cylinder, when the hydraulic force increasing tool works, hydraulic pressure pushes the pistons to move forwards, the pistons drive the central pipe to generate forward thrust, and the shaper is pushed to shape a deformed casing.
The hydraulic boosting tool further comprises a downhole tool stress monitoring short section, the downhole tool stress monitoring short section monitors the stress condition of the downhole tool in the implementation process, and monitoring signals are transmitted to the ground control device through the cable to be interpreted and analyzed.
The underground hydraulic repairing tool also comprises a connector, a hydraulic boosting tool, a patch pipe and a patch tool, wherein the connector is used for connecting the coiled tubing and the hydraulic boosting tool, the patch pipe is connected with the hydraulic boosting tool, after liquid pumped into the coiled tubing from the ground flows through the hydraulic boosting tool, the pressure is increased, the hydraulic boosting tool starts to work, and the patch tool is pushed to patch the patch pipe on the leakage-broken casing.
The hydraulic force increasing tool comprises pistons, a central pipe and an outer pipe, wherein the pistons are arranged on the central pipe, a certain distance is reserved between every two pistons, the pistons and the central pipe are both positioned in the outer pipe, when the hydraulic force increasing tool works, hydraulic pressure force pushes the pistons to move forwards, the pistons drive the central pipe to generate forward thrust, and the patching tool is pushed to patch the patching pipe on the leakage-breaking casing pipe.
The hydraulic boosting tool also comprises a downhole tool stress monitoring short section, wherein the downhole tool stress monitoring short section monitors the stress condition of the downhole tool in the implementation process, and monitoring signals are transmitted to the ground control device through the cable for interpretation and analysis.
The object of the invention can also be achieved by the following technical measures: the visual workover treatment method of the coiled tubing adopts a coiled tubing hydraulic workover string and comprises coiled tubing hydraulic shaping operation and coiled tubing hydraulic patching operation;
the hydraulic shaping operation of the continuous oil pipe comprises the following steps:
the hydraulic patching operation of the continuous oil pipe comprises the following steps:
and 4, transmitting the stress condition of the tool in the patching process to a ground control device through a coiled tubing built-in cable by the underground tool stress monitoring nipple, interpreting and analyzing data, and guiding subsequent construction.
The coiled tubing hydraulic workover string and the method greatly improve the efficiency and success rate of workover operation by integrating the advantages of 'coiled tubing rapid operation + hydraulic high-efficiency workover technology', are revolutionary innovations of workover operation modes, and have wide application prospects in the field of workover operation of various oil fields. Compared with the prior art, the invention has the following remarkable effects and progresses:
(1) The brand-new workover method is provided, the constraint that the coiled tubing can only be used in the fields of flushing, fracturing, perforating and the like is eliminated, the coiled tubing is applied to the field of shaft repair, the advantages of 'coiled tubing rapid operation + hydraulic efficient workover technology' are integrated, the efficiency and the success rate of workover operation are greatly improved, and the method is a revolutionary innovation of workover operation modes.
(2) The proposed underground hydraulic well repairing method makes up for the short plate of the coiled tubing, is matched with the underground hydraulic well repairing technology, transfers a power source from the ground to the underground, directly applies force to the underground well repairing position, and the coiled tubing is mainly used for conveying underground tools and liquid flow channels, bears the axial force within a controllable safety range, and ensures the operation safety.
(3) The well repairing under pressure is realized, the operation mode of the coiled tubing closed shaft is adopted, the operations of pulling out the tubular column, repairing the shaft and the like can be carried out under pressure, the problem of oil layer pollution caused by well killing operation is solved, and the problems of large occupied area, high cost, long period and the like of the traditional equipment under pressure are solved.
(4) A coiled tubing operation monitoring device is designed, the stress of the coiled tubing in workover operation is analyzed, the stress weak point of the coiled tubing is calculated, the fatigue period of the coiled tubing is predicted, and the operation safety of the coiled tubing is guaranteed.
(5) The cable is arranged in the coiled tubing, the force sensor is designed on the underground hydraulic workover tool, the sensing signal is transmitted to the ground through the coiled tubing, the performance of the workover tool can be analyzed according to the signal, and the success rate of workover operation can be effectively improved.
Drawings
FIG. 1 is a block diagram of one embodiment of a coiled tubing hydraulic workover string of the present invention;
FIG. 2 is a diagram of the internal structure of the coiled tubing in one embodiment of the present invention;
FIG. 3 is a diagram of a downhole hydraulic shaping tool according to an embodiment of the present invention;
FIG. 4 is a diagram of a downhole hydraulic patch tool according to an embodiment of the present invention;
FIG. 5 is a block diagram of a hydraulic boost tool in accordance with an embodiment of the present invention.
Detailed Description
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
As shown in fig. 1-5, the downhole hydraulic restoration tools include a downhole hydraulic shaping tool and a downhole hydraulic patch tool.
Referring to fig. 1, the coiled tubing hydraulic workover string comprises a ground control device 1, a coiled tubing 2 and a downhole hydraulic repair tool 3.
Referring to fig. 2, a cable 4 for transmitting power and signals is built in the coiled tubing 2.
Referring to fig. 3, the downhole hydraulic shaping tool comprises a coiled tubing stress monitoring nipple 5, a connector 6, a casing anchor tool 7, a hydraulic boosting tool 8 and a shaper 9.
Referring to fig. 4, the downhole hydraulic patch tool comprises a coiled tubing stress monitoring nipple 5, a connector 6, a hydraulic boosting tool 8, a patch tube 10 and a patch tool 11.
Referring to fig. 5, the hydraulic power tool comprises a piston 12, a central tube 13, an outer cylinder 14, and a downhole tool force monitoring nipple 15.
The connection mode is as follows: the underground hydraulic repairing tool 3 is connected with the coiled tubing 2, and the coiled tubing 2 is connected with ground coiled tubing operation equipment.
The transmission mode of the stress signal of the continuous oil pipe is as follows: the coiled tubing stress monitoring nipple 5 monitors the stress condition of the coiled tubing in the implementation process, and monitoring signals are transmitted to the ground control device 1 through the cable 4 for interpretation and analysis.
The transmission mode of the stress signal of the downhole tool is as follows: the underground tool stress monitoring short section 15 monitors the underground tool stress condition in the implementation process, and monitoring signals are transmitted to the ground control device 1 through the cable 4 for interpretation and analysis.
The implementation mode is as follows: the cable 4 is arranged in the coiled tubing 2 by using a cable penetrating tool, the underground hydraulic repairing tool 3 is connected with the coiled tubing 2 on the ground, and coiled tubing equipment is started to lower the coiled tubing 2 to the position of an oil-water well to be operated.
Implementation of a downhole hydraulic shaping tool: and (2) starting a pump truck on the ground, pumping liquid from the interior of the continuous oil pipe 2, increasing the pressure of the liquid after the liquid flows through the casing anchoring tool 7, enabling the casing anchoring tool 7 to work, fixing the tool string, continuously increasing the pressure, enabling the hydraulic boosting tool 8 to work, enabling the piston 12 to be pushed to move forwards by hydraulic pressure, enabling the piston 12 to drive the central pipe 13 to generate forward thrust, and pushing the shaper 9 to shape the deformed casing.
Implementing a downhole hydraulic patch tool: and (3) starting a pump truck on the ground, pumping liquid from the interior of the continuous oil pipe 2, increasing the pressure after the liquid flows through the hydraulic boosting tool 8, starting the hydraulic boosting tool 8 to work, pushing the piston 12 to move forwards by hydraulic pressure, driving the central pipe 13 by the piston 12 to generate forward thrust, and pushing the patching tool 11 to patch the patching pipe 10 on the leakage-broken casing pipe.
Claims (2)
1. The coiled tubing hydraulic workover string is characterized by comprising a ground control device, a coiled tubing and a downhole hydraulic repair tool, wherein the coiled tubing is connected with the downhole hydraulic repair tool, the ground control device is connected with the downhole hydraulic repair tool through a cable arranged in the coiled tubing, the downhole hydraulic repair tool repairs a downhole casing, monitors the stress condition of the coiled tubing in the repair process, and transmits a monitoring signal to the ground control device through the cable for interpretation and analysis;
the underground hydraulic repairing tool comprises a coiled tubing stress monitoring short section, wherein the coiled tubing stress monitoring short section is connected to the coiled tubing, monitors the stress condition of the coiled tubing in the repairing process, and transmits a monitoring signal to the ground control device through the cable for interpretation and analysis;
the downhole hydraulic repairing tool also comprises a connector and a casing anchoring tool, wherein the connector is connected with the coiled tubing and the casing anchoring tool, the pressure of the liquid pumped into the coiled tubing from the ground is increased after the liquid flows through the casing anchoring tool, and the casing anchoring tool works to fix the downhole hydraulic repairing tool; the downhole hydraulic repairing tool further comprises a hydraulic boosting tool and a shaper, wherein the shaper is connected to the hydraulic boosting tool, and the hydraulic boosting tool pushes the shaper to shape the deformed casing when the pressure continues to rise after the casing anchoring tool fixes the downhole hydraulic repairing tool;
the hydraulic force increasing tool comprises pistons, a central pipe and an outer cylinder, wherein the pistons are arranged on the central pipe, a certain distance is reserved between every two pistons, the pistons and the central pipe are both positioned in the outer cylinder, when the hydraulic force increasing tool works, hydraulic pressure pushes the pistons to move forwards, and the pistons drive the central pipe to generate forward thrust to push the shaper to shape a deformed casing;
the hydraulic boosting tool also comprises a downhole tool stress monitoring short section, wherein the downhole tool stress monitoring short section monitors the stress condition of the downhole tool in the implementation process, and monitoring signals are transmitted to the ground control device through the cable for interpretation and analysis;
the operation steps of the coiled tubing hydraulic workover string are as follows:
step 1, connecting a coiled tubing with a casing anchoring tool through a connector and running the coiled tubing into a position to be repaired of an oil-water well;
step 2, starting a pump truck on the ground, and pumping liquid from the interior of the continuous oil pipe;
step 3, after the liquid flows through the casing anchoring tool, the pressure rises, the casing anchoring tool works, the tool string is fixed, the pressure continues to rise, the hydraulic boosting tool starts to work, and the shaper is pushed to shape the deformed casing;
and 4, transmitting the stress condition of the tool in the shaping process to a ground control device through a coiled tubing built-in cable by the underground tool stress monitoring nipple, interpreting and analyzing data, and guiding subsequent construction.
2. The coiled tubing hydraulic workover string is characterized by comprising a ground control device, a coiled tubing and a downhole hydraulic repair tool, wherein the coiled tubing is connected with the downhole hydraulic repair tool, the ground control device is connected with the downhole hydraulic repair tool through a cable arranged in the coiled tubing, the downhole hydraulic repair tool repairs a downhole casing, the stress condition of the coiled tubing in the repair process is monitored, and a monitoring signal is transmitted to the ground control device through the cable for interpretation and analysis;
the underground hydraulic repairing tool comprises a coiled tubing stress monitoring short section, wherein the coiled tubing stress monitoring short section is connected to the coiled tubing, monitors the stress condition of the coiled tubing in the repairing process, and transmits a monitoring signal to the ground control device through the cable for interpretation and analysis;
the underground hydraulic repairing tool further comprises a connector, a hydraulic boosting tool, a patch pipe and a patch tool, wherein the connector is used for connecting the coiled tubing and the hydraulic boosting tool, the patch pipe is connected to the hydraulic boosting tool, after liquid pumped into the coiled tubing from the ground flows through the hydraulic boosting tool, the pressure is increased, the hydraulic boosting tool starts to work, and the patch tool is pushed to patch the patch pipe on the leakage-broken casing;
the hydraulic force increasing tool comprises pistons, a central tube and an outer tube, wherein the pistons are arranged on the central tube, a certain distance is reserved between every two pistons, the pistons and the central tube are both positioned in the outer tube, when the hydraulic force increasing tool works, hydraulic pressure pushes the pistons to move forwards, and the pistons drive the central tube to generate forward thrust to push the patching tool to shape a deformed sleeve;
the hydraulic boosting tool also comprises a downhole tool stress monitoring short section, wherein the downhole tool stress monitoring short section monitors the stress condition of the downhole tool in the implementation process, and monitoring signals are transmitted to the ground control device through the cable for interpretation and analysis;
the operation steps of the coiled tubing hydraulic workover string are as follows:
step 1, connecting a coiled tubing with a casing anchoring tool through a connector and running the coiled tubing to a to-be-repaired position of an oil-water well;
step 2, starting a pump truck on the ground, and pumping liquid from the interior of the continuous oil pipe;
step 3, after the liquid flows through the casing anchoring tool, the pressure rises, the casing anchoring tool works, the tool string is fixed, the pressure continues to rise, the hydraulic boosting tool starts to work, and the patching tool is pushed to shape the deformed casing;
and 4, transmitting the stress condition of the tool in the shaping process to a ground control device through a coiled tubing built-in cable by the underground tool stress monitoring nipple, interpreting and analyzing data, and guiding subsequent construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911043258.9A CN112727394B (en) | 2019-10-28 | 2019-10-28 | Coiled tubing hydraulic workover string and method |
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| CN201911043258.9A CN112727394B (en) | 2019-10-28 | 2019-10-28 | Coiled tubing hydraulic workover string and method |
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| CN112727394A CN112727394A (en) | 2021-04-30 |
| CN112727394B true CN112727394B (en) | 2023-01-13 |
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| CN116066001B (en) * | 2021-11-03 | 2024-04-26 | 中国石油天然气股份有限公司 | Hydraulic shaping method for sleeve-type well |
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| CN112727394A (en) | 2021-04-30 |
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