CN113494288A - Oil pipe leakage finding method and well repairing method - Google Patents
Oil pipe leakage finding method and well repairing method Download PDFInfo
- Publication number
- CN113494288A CN113494288A CN202010268433.0A CN202010268433A CN113494288A CN 113494288 A CN113494288 A CN 113494288A CN 202010268433 A CN202010268433 A CN 202010268433A CN 113494288 A CN113494288 A CN 113494288A
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- China
- Prior art keywords
- adsorption
- oil pipe
- well
- pipe leakage
- oil
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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
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
-
- 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
- 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/04—Measuring depth or liquid level
Abstract
The invention provides an oil pipe leakage finding method and a well repairing method, wherein the oil pipe leakage finding method adopts an adsorption assembly with a flexible adsorption belt to detect the position of a leakage point, and comprises the following steps: step 10, lowering the adsorption component to a set position, turning on the underground electric submersible pump and lifting the adsorption component at a constant speed; step 20, recording the lifting tension of the adsorption component through a tensiometer; and step 30, when the numerical value of the tensiometer rises first and then falls, recording the depth position corresponding to the adsorption component when the numerical value of the tensiometer rises. The method has the advantages that the position of the leakage point can be found quickly, the well repairing period is prolonged, the well repairing cost is saved, and the requirements of cost reduction, efficiency improvement and production operation are met.
Description
Technical Field
The invention relates to the field of well repair operation, in particular to an oil pipe leakage finding method and a well repair method.
Background
In the continuous production process of part of production wells, due to well conditions, the production string has an oil pipe perforation phenomenon to cause oil sleeve communication, which brings a series of problems to oil reservoir exploitation and leads to the reduction of oil recovery rate. Because the underground working condition is complex, the position of the perforation can not be accurately determined, the conventional solution is to repair and raise the pipe column, i.e. the pipe column is integrally raised for maintenance, so a large amount of manpower and material resources are consumed, and the production of an oil well is delayed.
Disclosure of Invention
The invention provides an oil pipe leakage finding method and a well repairing method, which aim to quickly find the perforation position of an oil well.
The technical scheme adopted by the invention for solving the technical problems is as follows: an oil pipe leakage finding method adopts an adsorption assembly with a flexible adsorption band to detect the position of a leakage point, and comprises the following steps: step 10, lowering the adsorption component to a set position, turning on the underground electric submersible pump and lifting the adsorption component at a constant speed; step 20, recording the lifting tension of the adsorption component through a tensiometer; and step 30, when the numerical value of the tensiometer rises first and then falls, recording the depth position corresponding to the adsorption component when the numerical value of the tensiometer rises.
Further, in step 10, the set position is above the downhole electric submersible pump.
Further, step 10 comprises: and turning on the downhole electric submersible pump, and opening the well with the lowest discharge capacity by the downhole electric submersible pump.
Further, the oil pipe leakage finding method further comprises the following steps: step 40, turning off the underground electric submersible pump, and lifting the adsorption component to the ground; step 50, lowering the adsorption component to the position above the depth position, opening the underground electric submersible pump and lifting the adsorption component at a constant speed; and step 60, repeatedly executing the step 20 and the step 30.
Further, the oil pipe leakage finding method further comprises the following steps: and 70, repeatedly executing the step 40, the step 50 and the step 60 until the oil well detection is finished.
Further, before step 10, the oil pipe leakage finding method further comprises the following steps: and step 1, manufacturing an adsorption assembly with a flexible adsorption belt.
Further, step 1 comprises: the lower end of a connecting rod is provided with a plurality of adsorption belt mounting holes, and at least one flexible adsorption belt is fixedly mounted in each adsorption belt mounting hole.
Further, the diameter of the oil well to be detected is d, and the step 1 further comprises: and adjusting the length of the flexible adsorption belts to enable the length of each flexible adsorption belt to be in the range of d to 1.5 d.
The invention also provides a well repairing method, which is used for repairing the position of the leakage point determined by the oil pipe leakage finding method and comprises the following steps: 80, putting the plugging component into an oil well and plugging the oil well; and step 90, pumping the fibrous cotton yarns into the well to repair the positions of the leaking points, and taking out the plugging component after the repair is finished.
Further, step 90 comprises: and when the numerical value of the pressure gauge for detecting the pressure of the oil well rises, the leak point position is repaired.
The method has the advantages that the position of the leakage point can be found quickly, the well repairing period is prolonged, the well repairing cost is saved, and the requirements of cost reduction, efficiency improvement and production operation are met.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic flow structure diagram according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, an embodiment of the present invention provides an oil pipe leakage finding method, in which an adsorption assembly having a flexible adsorption band is used to detect a leakage point position, including the following steps:
step 10, lowering the adsorption component to a set position, turning on the underground electric submersible pump and lifting the adsorption component at a constant speed;
step 20, recording the lifting tension of the adsorption component through a tensiometer;
and step 30, when the numerical value of the tensiometer rises first and then falls, recording the depth position corresponding to the adsorption component when the numerical value of the tensiometer rises.
Above-mentioned adsorption component with flexible adsorption band is when the leak source position, because pressure effect flexible adsorption band can be adsorbed by the leak source position in the twinkling of an eye, increases adsorption component's upward lifting force to make tensiometer pointer take place undulantly, the adsorption component position is the leak source position this moment, can accurately confirm this leak source position according to the coupling assembling length of connecting adsorption component. The embodiment of the invention can quickly find the position of the leaking point, prolongs the well repairing period, saves the well repairing cost and meets the requirements of cost reduction, efficiency improvement and production.
In step 10, the set position is above the underground electric submersible pump. In the embodiment of the invention, the set position is an approximate position where a leakage point often appears, the leakage point in a common oil well appears above the electric submersible pump, and the set position can be changed into other positions according to the specific conditions of different oil wells.
Step 10 in this embodiment includes: the underground electric submersible pump is started, the well is opened at the lowest discharge capacity, and the influence of the oil pumping pressure on the adsorption component can be reduced to the minimum by controlling the discharge capacity of the electric submersible pump, so that the adsorption component can be accurately adsorbed by a leakage point.
Further, the oil pipe leakage finding method further comprises the following steps:
step 40, turning off the underground electric submersible pump, and lifting the adsorption component to the ground;
step 50, lowering the adsorption component to the position above the depth position, opening the underground electric submersible pump and lifting the adsorption component at a constant speed;
and step 60, repeatedly executing the step 20 and the step 30.
The steps 40, 50 and 60 are to detect the position above the detected leakage point, and each time the adsorption assembly is lifted to the ground to reduce the error interference, and simultaneously the state of the flexible adsorption belt on the adsorption assembly can be checked, and if the flexible adsorption belt is damaged more, the flexible adsorption belt can be replaced and supplemented in time.
Further, the oil pipe leakage finding method further comprises the following steps: and 70, repeatedly executing the step 40, the step 50 and the step 60 until the oil well detection is finished. The embodiment of the invention can carry out leak point inspection on the whole oil well through multiple detections, can ensure that the leak point position is not missed, and is convenient for corresponding repair at the later stage.
Before step 10, the oil pipe leakage finding method further comprises the following steps: and step 1, manufacturing an adsorption assembly with a flexible adsorption belt.
The specific step 1 is as follows: the lower end of a connecting rod is provided with a plurality of adsorption belt mounting holes, and at least one flexible adsorption belt is fixedly mounted in each adsorption belt mounting hole.
Wherein, the one end of above-mentioned flexible adsorption band hangs down and establishes in the outside of the lower extreme of connecting rod to make flexible adsorption band can be adsorbed by the leak source position and to upwards causing the resistance.
Further, the diameter of the oil well to be detected is d, and the step 1 further comprises: and adjusting the length of the flexible adsorption belts to enable the length of each flexible adsorption belt to be in the range of d to 1.5 d. The invention limits the length of the flexible adsorption belt, so that the flexible adsorption belt is long enough and can ensure that the flexible adsorption belt can be adsorbed at any position of the plane of the leak point in the pipe column.
The invention also provides a well repairing method, which repairs the position of the leakage point determined by the oil pipe leakage finding method, and the well repairing method comprises the following steps:
80, putting the plugging component into an oil well and plugging the oil well;
and step 90, pumping the fibrous cotton yarns into the well to repair the positions of the leaking points, and taking out the plugging component after the repair is finished.
By the aid of the repairing method, the position of the leaking point can be repaired under the condition that the pipe column is not pulled out, and the cost of repairing the well can be saved.
Specifically, step 90 includes: and when the numerical value of the pressure gauge for detecting the pressure of the oil well rises, the leak point position is repaired. After the plugging device is put in, whether the leak point position is repaired is judged through the pressure change of the oil well, and when the leak point position is repaired, the inner pipe column of the oil well does not have a leak hole to release pressure, so that the internal pressure of the inner pipe column of the oil well can be increased.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the embodiment of the invention can quickly find the position of the leaking point, prolongs the well repairing period, saves the well repairing cost and meets the requirements of cost reduction, efficiency improvement and production.
The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, so that the invention is intended to cover all modifications and equivalents of the embodiments described herein. In addition, the technical features, the technical schemes and the technical schemes can be freely combined and used.
Claims (10)
1. An oil pipe leakage finding method adopts an adsorption assembly with a flexible adsorption band to detect the position of a leakage point, and is characterized by comprising the following steps:
step 10, lowering the adsorption component to a set position, turning on an underground electric submersible pump and lifting the adsorption component at a constant speed;
step 20, recording the lifting tension of the adsorption component through a tensiometer;
and step 30, when the numerical value of the tensiometer rises first and then falls, recording the depth position corresponding to the adsorption component when the numerical value of the tensiometer rises.
2. The method of claim 1, wherein in step 10, the setting position is above the downhole electrical submersible pump.
3. The oil pipe leakage detection method according to claim 2, wherein the step 10 comprises: and opening the downhole electric submersible pump, and opening the well with the lowest discharge capacity.
4. The oil pipe leakage detection method according to claim 1, further comprising the steps of:
step 40, turning off the underground electric submersible pump, and lifting the adsorption assembly to the ground;
step 50, lowering the adsorption component to the position above the depth position, opening the underground electric submersible pump and lifting the adsorption component at a constant speed;
and step 60, repeatedly executing the step 20 and the step 30.
5. The oil pipe leakage detection method according to claim 4, further comprising the steps of: and 70, repeatedly executing the step 40, the step 50 and the step 60 until the oil well detection is finished.
6. The oil pipe leakage detection method according to claim 1, further comprising, before the step 10, the steps of: and step 1, manufacturing the adsorption assembly with the flexible adsorption belt.
7. The oil pipe leakage detection method according to claim 6, wherein the step 1 comprises: and arranging a plurality of adsorption belt mounting holes at the lower end of a connecting rod, and fixedly mounting at least one flexible adsorption belt in each adsorption belt mounting hole.
8. The oil pipe leakage detection method according to claim 7, wherein the diameter of the oil well to be detected is d, and the step 1 further comprises: and adjusting the length of the flexible adsorption belts to enable the length of each flexible adsorption belt to be in the range of d to 1.5 d.
9. A well repairing method for repairing a leak point position determined by the oil pipe leak finding method according to any one of claims 1 to 8, wherein the well repairing method comprises the following steps:
80, lowering the plugging assembly into an oil well and plugging the oil well;
and step 90, pumping the fibrous cotton yarns into the well to repair the leakage point position, and taking out the plugging component after the repair is finished.
10. The well servicing method of claim 9, wherein said step 90 comprises: and when the numerical value of a pressure gauge for detecting the pressure of the oil well rises, the leak point position is repaired.
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| CN202010268433.0A CN113494288B (en) | 2020-04-08 | 2020-04-08 | Oil pipe leakage finding method and well repairing method |
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| CN202010268433.0A CN113494288B (en) | 2020-04-08 | 2020-04-08 | Oil pipe leakage finding method and well repairing method |
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| CN113494288B CN113494288B (en) | 2023-08-22 |
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| CN113494288B (en) | 2023-08-22 |
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