CN112129501A - Device and method for predicting service life of sucker rod centralizer - Google Patents
Device and method for predicting service life of sucker rod centralizer Download PDFInfo
- Publication number
- CN112129501A CN112129501A CN202010888550.7A CN202010888550A CN112129501A CN 112129501 A CN112129501 A CN 112129501A CN 202010888550 A CN202010888550 A CN 202010888550A CN 112129501 A CN112129501 A CN 112129501A
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- Prior art keywords
- sucker rod
- centralizer
- oil pipe
- insulating container
- sleeve
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000012530 fluid Substances 0.000 claims abstract description 18
- 230000008878 coupling Effects 0.000 claims abstract description 15
- 238000010168 coupling process Methods 0.000 claims abstract description 15
- 238000005859 coupling reaction Methods 0.000 claims abstract description 15
- 238000005299 abrasion Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000005086 pumping Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims 2
- 238000002474 experimental method Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 35
- 239000003129 oil well Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The invention discloses a device and a method for predicting the service life of a sucker rod centralizer, wherein the device comprises a driving device, an insulating container, a sleeve, an oil pipe, a sucker rod and the centralizer; the output end of the driving device is provided with a direction-changing coupling; the sleeve is arranged in the insulating container, and the oil pipe is arranged in the sleeve; one end of the sucker rod is arranged in the oil pipe, the centralizer is arranged on the sucker rod, and the other end of the sucker rod penetrates through the oil pipe, the sleeve and the insulating container to be connected with the turning coupling; the insulating container is provided with a fluid inlet; the output end of the driving device is provided with a force transducer; and a pressure sensor is arranged between the insulating container and the sleeve. The invention obtains the mass loss and the diameter loss per kilometer of the sucker rod through an indoor experiment, and then predicts the service life of the centralizer.
Description
Technical Field
The invention belongs to the technical field of oil extraction engineering, and particularly relates to a device and a method for predicting the service life of a sucker rod centralizer.
Background
The prior art generally adopts the sucker rod pump oil extraction of directional well, and the sucker rod is inserted and is located in the oil pipe, and the sucker rod plays fairly important effect wherein. Because the track of the well hole of the directional well has a certain inclination at the lower part, the sucker rod runs up and down in the oil pipe and the friction is generated on the inner wall of the oil pipe, and the eccentric wear prevention of the rod pipe is particularly important for the normal production of the oil well.
The common rod-pipe anti-eccentric technology for oil fields is to optimize the combination of multi-stage sucker rod-columns, design a weighting rod at the bottom of the rod-column, anchor the oil pipe with an oil pipe anchor, add a certain number of centralizers at proper depth, use a sucker rod rotator and the like, wherein the centralizers are used to dominate the anti-eccentric technology of the sucker rod-column. In order to enable an oil well to normally produce, the material, the structure and the service life of the centralizer are all key factors influencing the pump detection period of the oil well, and the current research mainly focuses on the structure and the material of the centralizer, and the research on the service life prediction of the centralizer is very few. The current prediction of sucker rod service life is mainly in indoor experiments, and the American society for testing and materials and the International organization standardization provide a standardized test procedure of plastic to metal abrasion. This wear test equipment uses a linear reciprocating or needle-on-disk (rotary) tribometer. These two types of wear measurement devices are the two most widely used wear measurement devices, and these tests do not fully consider the specific conditions of field corrosion, fluid properties, etc., as a suitable lubricant, and more as a comparison of the wear amounts of two different materials, the service life of the centralizer cannot be predicted, which directly results in the failure to take measures before the centralizer fails, further increasing the production cost of the oil field.
Disclosure of Invention
The invention aims to obtain the mass loss and the diameter loss per kilometer of the sucker rod through an indoor experiment so as to predict the service life of the centralizer. In order to achieve the technical purpose, the invention provides a device and a method for predicting the service life of a sucker rod centralizer.
In order to achieve the above object, the present invention provides the following technical solutions.
A device for predicting the service life of a sucker rod centralizer comprises a driving device, an insulating container, a sleeve, an oil pipe, a sucker rod and the centralizer;
the output end of the driving device is provided with a direction-changing coupling;
the sleeve is arranged in the insulating container, and the oil pipe is arranged in the sleeve; one end of the sucker rod is arranged in the oil pipe, the centralizer is arranged on the sucker rod, and the other end of the sucker rod penetrates through the oil pipe, the sleeve and the insulating container to be connected with the turning coupling; the insulating container is provided with a fluid inlet;
the output end of the driving device is provided with a force transducer; and a pressure sensor is arranged between the insulating container and the sleeve.
And the sucker rods at the two ends of the centralizer are also provided with additional weight blocks.
The sleeve is arranged in the insulating container through a sleeve fixing device, and the oil pipe is arranged in the sleeve through an oil pipe fixing device.
The oil pipe fixer consists of three movable bolts with 120-degree intervals.
The oil pipe, the sleeve, the insulating container and the sucker rod are coaxially arranged.
The material of the insulating container consists of fibres.
The use method of the device for predicting the service life of the sucker rod centralizer comprises the following steps:
fixing the sleeve in the insulating container by using a sleeve fixer, and fixing the oil pipe in the sleeve by using an oil pipe fixer;
connecting pumping rods with different rod diameters by adopting a turning coupling, and mounting a centralizer on the pumping rod in the insulating container;
the other end of the sucker rod is connected with a driving device to enable the sucker rod to reciprocate, and a force measuring sensor is arranged at the same time and used for monitoring the change of external applied force;
connecting pumping rods with different diameters inside and outside the insulating container by using a coupling for measurement;
connecting a pressure sensor on the sleeve to record pressure change;
providing a fluid inlet on the insulating container, and injecting fluid obtained from the field into the insulating container;
applying a driving device to provide power to enable the centralizer to reciprocate in the oil pipe, and recording the abrasion time, the abrasion quality and the abrasion diameter of the material to be measured when the centralizer begins to be abraded;
and analyzing the data to obtain the abrasion loss and the service life of the centralizer.
Compared with the prior art, the invention has the following beneficial effects:
the experimental device simulates the working environment of the actual centralizer through the insulating container, the sleeve and the oil pipe, realizes laboratory simulation of the centralizer by driving the sucker rod to move through the driving device, can predict the service life of the centralizer, takes measures before the centralizer fails, and further increases the production cost of an oil field. The device realizes the production conditions of fluid, corrosion, high temperature (0-90 ℃) and high pressure (0-25 MPa) under the real condition of the simulated oil well.
Preferably, the insulating container is provided with a fluid inlet, and crude oil and clean water can be mixed according to a certain proportion to simulate different water-containing conditions (0-100%) of an oil well.
Preferably, extra weight piece can carry out the counter weight to the centralizer, and the wearing and tearing test of centralizer diameter and quality can be tested to the condition on more real simulation scene, predicts sucker rod centralizer life.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the invention as a matter of case. In the drawings:
FIG. 1 is an apparatus for predicting the useful life of a sucker rod centralizer;
FIG. 2 is a schematic view of the tubing holder 4;
description of reference numerals: 15. a bolt; 16. a bolt; 17. a bolt; 12. tubing 12.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The embodiment provides a device for predicting the service life of a sucker rod centralizer, which comprises an insulating container 10, a driving device 1, a force measuring sensor 2 and a turning coupling 3, wherein a sucker rod 13 is arranged in the insulating container 10, one end of the sucker rod 13 is connected with the driving device 1, and the force measuring sensor 2 is arranged on the sucker rod 13, as shown in fig. 1.
The insulated container 10 comprises a fluid inlet 8, a casing 11, an oil pipe 12, a pressure sensor 9, an additional weight, a sucker rod 13, a centralizer 14, an oil pipe fixer 4 and a casing fixer. Oil pipe 12 is in casing 11 and sucker rod 13 is in oil pipe 12.
The insulating container 10 material is composed of fibers to prevent electrical conduction. Tubing retainer 4 is to retain tubing 12 in the gland, thereby preventing movement of tubing 12; the additional weights 5, 7 are added to simulate the situation in the field, changing the contact pressure between the rod tubes, the additional weights 5, 7 being mounted at both ends of the centralizer 14; the pressure sensor 9 is mounted on the sleeve 11 in order to monitor the pressure changes.
The driving device 1 is connected with a sucker rod 13, and the sucker rod 13 is driven by the speed regulation to move forwards and backwards, so that a centralizer 14 arranged in an oil pipe 12 is driven to reciprocate.
The load cell 2 is mounted on the sucker rod 13 so that the applied external force can be monitored.
The direction-changing coupling 3 is connected with the sucker rods 13 with different sizes, and aims to simulate that the combination of the sucker rods 13 in a real field is composed of different rod diameters, so that the experimental result is more accurate.
The fluid inlet 8 is arranged on the insulating layer, and is used for injecting fluid into the container from the outside in order to simulate the real environment of the site, sampling the fluid from the site, and selecting the fluid component of the solid.
As shown in fig. 2, the tubing holder 4 is used to hold tubing 12 in a sealed tube using three moving bolts spaced 120 ° apart to allow the tubing 12 to adjust and align the centerline of the pneumatic piston to prevent movement of the tubing 12 string.
The invention also provides a use method of the device for predicting the service life of the sucker rod centralizer, which comprises the following steps:
the method comprises the following steps: the sleeve 11 is fixed in the insulating container 10 by a sleeve fixer, and the oil pipe 12 is fixed in the sleeve 11 by an oil pipe fixer 4, so that the oil pipe 12 is prevented from rubbing the sleeve 11 after moving. The outer diameter of the oil pipe 12 tested by the set of equipment is from 73.02mm to 114.3 mm.
Step two: the sucker rods 13 with different rod diameters are connected by adopting a coupling, the centralizer 14 is arranged on the sucker rod 13 in the insulating container 10, extra weight is additionally arranged at the two ends of the centralizer 14, and the true direction-finding force borne by the sucker rod 13 in a shaft is simulated.
Step three: the other end of the sucker rod 13 is connected with a driving device 1, so that the sucker rod 13 reciprocates, and meanwhile, a load cell 2 is arranged to monitor the change of external applied force.
Step four: tubing 12 is prevented from moving by three 120 ° moving bolts, aligning and aligning tubing 12 to the center of drive 1.
Step five: the sucker rods 13 with different diameters inside and outside the insulating container 10 are connected by a coupling, the sucker rod 13 with phi 16mm and the sucker rod 13 with phi 19mm are used inside the insulating container 10, and the sucker rods 13 with different diameters are mainly used for simulating the combination condition of real oil well rods, so that the test result is more convincing.
Step six: a pressure sensor 9 is connected to the sleeve 11 and records the pressure change.
Step seven: a fluid inlet 8 is provided in the insulated vessel 10 to allow the vessel to be filled with fluid taken from the field, whilst the ratio of crude oil to clean water can be varied to conform as much as possible to the well bore environment at the field.
Step eight: the driving device 1 is used for providing power, the centralizer 14 reciprocates in the oil pipe 12, and when the centralizer 14 starts to be worn, the abrasion time, the abrasion quality and the abrasion diameter of the material to be measured are recorded.
Step nine: and analyzing the data to obtain the abrasion loss and the service life of the centralizer 14.
It should be noted that, in the description of the present invention, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is considered as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided would be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego such subject matter, nor should the applicant consider that such subject matter is not considered part of the disclosed subject matter.
Claims (7)
1. The device for predicting the service life of the sucker rod centralizer is characterized by comprising a driving device (1), an insulating container (10), a sleeve (11), an oil pipe (12), a sucker rod (13) and the centralizer (14);
the output end of the driving device (1) is provided with a direction-changing coupling (3);
the sleeve (11) is arranged in the insulating container (10), and the oil pipe (12) is arranged in the sleeve (11); one end of the sucker rod (13) is arranged in the oil pipe (12), the centralizer (14) is arranged on the sucker rod (13), and the other end of the sucker rod (13) penetrates through the oil pipe (12), the sleeve (11) and the insulating container (10) to be connected with the turning coupling (3); the insulating container (10) is provided with a fluid inlet (8);
the output end of the driving device (1) is provided with a force transducer (2); a pressure sensor (9) is arranged between the insulating container (10) and the sleeve (11).
2. The device for predicting the service life of the sucker rod centralizer according to claim 1, wherein the sucker rod (13) at both ends of the centralizer (14) is further provided with an additional weight.
3. The apparatus for predicting the lifespan of a sucker rod centralizer according to claim 1, wherein the casing (11) is disposed in the insulation vessel (10) by a casing holder, and the oil pipe (12) is disposed in the casing (11) by an oil pipe holder (4).
4. The device for predicting the service life of a sucker rod centralizer according to claim 3, characterized in that the tubing holder (4) consists of three mobile bolts spaced 120 ° apart.
5. The device for predicting the service life of the sucker rod centralizer according to claim 1, wherein the oil pipe (12), the casing (11), the insulating container (10) and the sucker rod (13) are coaxially arranged.
6. The device for predicting the lifespan of a sucker rod centralizer according to claim 1, characterized in that the material of the insulation container (10) is composed of fibers.
7. The use method of the device for predicting the service life of the sucker rod centralizer according to any one of claims 1 to 6 is characterized by comprising the following steps:
fixing a sleeve (11) in an insulating container (10) by using a sleeve fixer, and fixing an oil pipe (12) in the sleeve (11) by using an oil pipe fixer (4);
connecting pumping rods (13) with different rod diameters by adopting a turning coupling (3), and installing a centralizer (14) on the pumping rods (13) in the insulating container (10);
the other end of the sucker rod (13) is connected with a driving device (1) to enable the sucker rod (13) to reciprocate, and a force measuring sensor (2) is arranged at the same time and used for monitoring the change of external applied force;
connecting pumping rods (13) with different diameters inside and outside the insulating container (10) by using a coupling for measurement;
a pressure sensor (9) is connected to the sleeve (11) and records pressure change;
a fluid inlet (8) is arranged on the insulating container (10), and fluid taken from the field is injected into the insulating container (10);
the driving device (1) is used for providing power, the centralizer (14) is made to reciprocate in the oil pipe (12), and when the centralizer (14) begins to wear, the wear time, the wear quality and the wear diameter of a material to be measured are recorded;
and analyzing the data to obtain the abrasion loss and the service life of the centralizer (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010888550.7A CN112129501A (en) | 2020-08-28 | 2020-08-28 | Device and method for predicting service life of sucker rod centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010888550.7A CN112129501A (en) | 2020-08-28 | 2020-08-28 | Device and method for predicting service life of sucker rod centralizer |
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| Publication Number | Publication Date |
|---|---|
| CN112129501A true CN112129501A (en) | 2020-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010888550.7A Pending CN112129501A (en) | 2020-08-28 | 2020-08-28 | Device and method for predicting service life of sucker rod centralizer |
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| CN (1) | CN112129501A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113588249A (en) * | 2021-09-02 | 2021-11-02 | 中海油田服务股份有限公司 | Eccentric ware and centralizer class instrument fatigue test equipment |
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Application publication date: 20201225 |