CN107063524A - The lateral force tester of oil well rod tube and method of testing - Google Patents
The lateral force tester of oil well rod tube and method of testing Download PDFInfo
- Publication number
- CN107063524A CN107063524A CN201710307414.2A CN201710307414A CN107063524A CN 107063524 A CN107063524 A CN 107063524A CN 201710307414 A CN201710307414 A CN 201710307414A CN 107063524 A CN107063524 A CN 107063524A
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- side force
- circuit
- detection part
- oil well
- rod tube
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/225—Measuring circuits therefor
- G01L1/2262—Measuring circuits therefor involving simple electrical bridges
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The present invention provides a kind of lateral force tester of oil well rod tube for carrying out oil well rod tube side force measurement, including sealing sheath, matrix sheath, side force detection part, secure component for measuring side force between R a T, also include the ware circuit electrically connected with side force detection part, detection signal and and upper machine communication that ware circuit reception processing side force detection part is sent.
Description
Technical field
The present invention relates to beam hanger mechanical oil recovery field, and in particular to a kind of lateral force tester of oil well rod tube and test side
Method.
Background technology
In petroleum industry, beam hanger mechanical oil recovery is most widely used technology in our times oil recovery business.And in reality
In the oil recovery process of border, when sucker rod carries out cycle movement up and down reciprocatingly, extruding is produced between sucker rod and oil pipe inner tubal wall
Friction, frequently results in and eccentric wear occurs between sucker rod and oil pipe.This eccentric wear problem not only reduces the intensity of sucker rod, even
The failures such as beam hanger is broken, tubing wall is worn out can be caused.As the most of oil field of China enters mid-later development phase, oil well is contained by crude oil
The influence of the factors such as water height, corrosive liquid increase, hole deviation, down-hole pipe eccentric wear phenomenon is increasingly severe, causes pipe to leak bar
Disconnected phenomenon increase, well workover rate gradually rise, operating cost increase, so that the production economy benefit in oil field is severely impacted.
At present, the research both at home and abroad for eccentric abrasion prevention measure substantially has rod tube structural wood of fine qualityization, rod tube to apply scuff-resistant coating, all kinds of circulators
Or centralizer etc., but because the specific mechanics parameter to forming eccentric wear is unintelligible, cause these measures all to fail fundamentally to solve
Certainly eccentric wear problem.
The content of the invention
For the above, the present invention provides a kind of oil well rod tube side force for carrying out oil well rod tube side force measurement and surveyed
Try instrument, including sealing sheath, matrix sheath, for measuring the side force detection part of side force between R a T, it is tight
Gu part, in addition to the ware circuit electrically connected with side force detection part, ware circuit reception processing side force
Detection signal and and upper machine communication that detection part is sent；
Matrix sheath is cylindrical structure, including the taper end and butt end being connected respectively with oil pipe；Matrix sheath may connect to two oil
Between pipe, sucker rod can be passed through in the middle of matrix sheath；
Sealing sheath is enclosed on outside the taper end of matrix sheath, close provided with two grades of O-rings between the taper end of sealing sheath and matrix sheath
Envelope, forms a ring packing space for placing ware circuit；
Side force detection part is on the inside of the butt end of matrix sheath, and secure component is installed on the butt end of matrix sheath and offside
Sealing is fixed to power detection part；
Two weeks multiple cuboid side forces parallel to each other above and below being evenly distributed with side force detection part outer wall intermediate region
Block is transmitted, side force transmits the side adhering resistance strain sheets of block, constitutes stress mornitoring point；When side force transmission block is pumped
When the power that bar transmission comes is deformed upon, resistance strain gage thereon is also deformed upon therewith, causes the change of resistance strain gage resistance
Change；Ware circuit is electrically connected with resistance strain gage, is received the change in resistance of resistance strain gage and is calculated side force.
It is preferred that, Internal Pipe Thread of the taper end provided with UPTBG external pipe threads and oil pipe of matrix sheath is connected；Matrix sheath
External pipe thread of the butt end provided with UPTBG Internal Pipe Threads and oil pipe is connected.
It is preferred that, the taper end internal diameter size of described matrix sheath is more than tubing size, with ensure side force detection part with
Normal friction contact between sucker rod.
It is preferred that, side force detection part bosom position is detected provided with annular region wide 9 ~ 10mm, and side force
The inner ring radius of part is less than two ends radius, to ensure that side force detection part is contacted with the normal friction of sucker rod.
Further, two weeks parallel to each other 4 above and below being evenly distributed with side force detection part outer wall intermediate region
Cuboid side force transmits block, and the angle of two neighboring side force transmission block is 90 °.
It is preferred that, ware circuit include signal detection bridge, signal conditioning circuit, main control circuit, data storage circuitry,
Serial communication circuit and power circuit；The signal detection bridge is connected by signal conditioning circuit with governor circuit, described
Data storage circuitry is connected with main control circuit respectively with serial communication circuit, the power circuit and signal detection bridge, letter
Number modulate circuit, main control circuit, data storage circuitry, serial communication circuit connection power supply.
Further, the signal detection bridge is connected using semibridge system, and 2 sides of each side force transmission block are respectively pasted
2 foil gauges on 1 sheet resistance foil gauge, same side force transmission block are connected in series, side force detection part equidirectional up and down 2
The foil gauge of individual side force transmission block is also connected in series, and 4 sheet resistance foil gauges, which are connected in series, altogether constitutes the one of half bridge circuit
Individual bridge arm, realizes that semibridge system is connected with another bridge wall being made up of in relative direction other 4 resistance strain gages being connected in series.
It is preferred that, the signal conditioning circuit includes instrument amplifier and is arranged at the difference RC filters of instrument amplifier front end
Wave circuit.
The present invention also provides a kind of method of testing for testing oil well rod tube side force, including：Pass through side force detection part
Gather pressure that each side force transmission block bears and transmit to ware circuit, ware circuit is according to having detected stress
The position angle of two neighboring side force transmission block judge lateral force direction, and according to the transmission of the two neighboring side force of stress
The pressure that block is bornWith, and between two adjacent side power transmission blocks angle supplementary angleCalculate it to make a concerted effort, as oil well
Rod tube side force。
Further, when the angle that two neighboring side force transmits block is 90 °, oil well rod tube side force。
The side force that the present invention is produced when can be to down-hole pipe eccentric wear is accurately measured, and disclosure satisfy that actual measurement is needed
Ask, direct basis will be provided for the study on prevention of side-abrasion of rod string, be conducive to technologist to study tube rod friction rule and to each
The actual effect for planting eccentric abrasion prevention measure is estimated, and guarantee oil field, which is normally produced and increased economic efficiency, to play an important roll.
Brief description of the drawings
Fig. 1 is lateral force tester mechanical part structural scheme of mechanism.
Fig. 2 is the mechanical structural representation of lateral force tester matrix sheath.
Fig. 3 is lateral force tester detection part axial, cross-sectional view.
Fig. 4 is that lateral force tester detection part is radially schemed.
Fig. 5 is lateral force tester ware circuit structure chart.
Fig. 6 is signal conditioning circuit diagram.
Embodiment
The present invention is further described for explanation and specific embodiment below in conjunction with the accompanying drawings.
Whole lateral force tester includes mechanical part, circuit system；Wherein, mechanical part connects with reference to actual tubing coupling
Form design is connect, is fixed between the oil pipe of two sections of underground, lateral force tester receives the extrusion friction of sucker rod and generation
Mechanical deformation passes to side force detection part, at the same also for be placed on its internal ware circuit provides installing space with
Normal operation circumstances；The mechanical strain that ware circuit mainly produces side force is converted into faint bridge voltage output letter
Number, and voltage signal is filtered, amplified, A/D conversions, storage etc., and undertake the work such as data communication with host computer.
The lateral force tester mechanical part that the present invention is designed includes matrix sheath 1, side force detection part 2, sealing shield
Side force transmission block 5 is designed with set 3 and secure component 4, side force detection part 2, it is specific as shown in Figure 1.
Its each several part concrete structure design is described as follows：
（1）Matrix sheath：Matrix sheath plays oil pipe and built-in above and below connection as the main body of lateral force tester mechanical part
The function of side force detection part, while directly being contacted with the external world, protects laterally therein power detection part, the signal of its mechanical structure
Figure is as shown in Figure 2.Matrix sheath one end is the UP TBG Internal Pipe Threads connection of UP TBG external pipe threads and oil pipe；The other end is set
The external pipe thread for being calculated as UP TBG Internal Pipe Threads and oil pipe is connected；Its taper end internal diameter size is slightly larger than oil pumping pipe size, to ensure
Normal friction between stress mornitoring part and sucker rod is contacted.Meanwhile, it is close that matrix sheath taper end flange designs two grades of O-rings
Envelope, further with sealing sheath composition ring packing space, for installing ware circuit, and protects ware circuit not
By external disturbance.
（2）Side force detection part：Side force detection part is placed in matrix sheath, is fixed by secure component close
Two weeks parallel to each other 4 cuboid side forces are passed above and below being evenly distributed with envelope, side force detection part outer wall intermediate region
Block A, B, C, D are passed, the angle of two neighboring side force transmission block is 90 °, and its mechanical structure schematic diagram is as shown in Figure 3,4.
Paste special resistance strain gage in side force transmission block side on side force detection part.Detection part is whole
The core of lateral force tester, plays a part of receiving stress and detects stress intensity.For proof stress detection part
Wearability, selects its material wearability to be higher than oil pipe material.Two grades of O-ring sealings are designed at side force detection part two ends,
Ensure internal circuit normal work.Side force detection part bosom Position Design have the annular region of about 10mm width and
Its inner ring radius is less than two ends radius, to ensure that detection part is contacted with the normal friction of sucker rod, is conducive to detection part high
Effect receives lateral forces, so as to improve the sensitivity of tester.
（3）Side force transmits block：Special resistance strain gage is pasted in the side of side force transmission block, constitutes stress mornitoring
Point.When side force transmission block stress is deformed upon, resistance strain gage thereon is also deformed upon therewith, causes resistance strain gage
The change of resistance.Because side force transmission block is that deformation is produced by the extruding with side force matrix sheath, therefore to ensure
The accuracy of measurement, it is desirable to which the side force detection part external diameter at side force transmission block is interference fitted with matrix sheath, so that real
Existing side force detection part is contacted with the hard of matrix sheath so that resistance strain gage has preferably linear in nearly zero crossings
Degree.
The method tested using lateral force tester is：Lateral force tester be connected two sections of underground oil pick-up tube it
Between, sucker rod is moved back and forth inside tester and when sucker rod is sent out in the radial direction with side force detection part inwall a certain
During raw eccentric wear extruding, the side force transmission block on side force detection part is produced with tester matrix sheath in the same direction immediately
Extruding, sucker rod extrudes the radial direction side force produced with side force detection part eccentric wear and is passed to side force transmission block immediately
On, each side force is gathered by side force detection part and transmits pressure that block bears and transmits to ware circuit, hardware electricity
The position angle that road system transmits block according to the two neighboring side force for detecting stress judges lateral force direction, and according to by
The pressure that the two neighboring side force transmission block of power is bornWith, and pass through angle between two adjacent side power transmission blocks
Supplementary angleCalculate it to make a concerted effort, as oil well rod tube side force, it is real herein
Apply when the angle that two neighboring side force transmits block is 90 ° in example, therefore oil well rod tube side force is。
In the empty cabin of annular that ware circuit is installed in sealing sheath with matrix sheath taper end is constituted, it mainly includes
Signal detection bridge 21, signal conditioning circuit 22, main control circuit 23, data storage circuitry 24, serial communication circuit 25 and electricity
Source circuit 26, as shown in figure 5, its each several part circuit design is described as follows.
（1）Signal detection bridge：The strain resistance of resistance strain gage is converted to faint millivolt level by signal detection bridge
Voltage signal, its bridge connected mode is connected using semibridge system；Respectively 1 sheet resistance of patch should for 2 sides of each side force transmission block
The 2 sheet resistance foil gauges become on piece, same side force transmission block are connected in series, equidirectional 2 sides up and down of side force detection part
The foil gauge for transmitting block to power is also connected in series, and 4 sheet resistance foil gauges are connected in series a bridge for constituting half bridge circuit altogether
Arm, realizes that semibridge system is connected with another bridge wall being made up of in relative direction other 4 resistance strain gages being connected in series.Resistance
Foil gauge is using the single-shaft variant foil gauge of Japanese republicanism company, and resistance size is 350 Ω, sensitivity coefficient K=2.03.
（2）Signal conditioning circuit：The voltage signal of signal detection bridge output is connected with signal conditioning circuit and it is entered
Row amplification, filtering, amplify small-signal the voltage signal range for being adjusted to be adapted to AD collections.As shown in fig. 6, signal condition is electric
Road amplification circuits select ADI companies instrument amplifier AD8231, and the small-signal that sensor in noise circumstance is exported is entered
Row amplification.But stronger radiofrequency signal occurs in application for instrument amplifier, therefore amplifier front-end designs a difference RC
Filtered electrical terminal, to decay to radiofrequency signal, so as to suppress the Radio frequency interference error in amplifying circuit.
（3）Main control circuit：System, as main control chip, is responsible for whole circuit system from ADI companies Chip Microcomputer A/D uC845
The coordination control of system is changed with signal A/D, can complete the A/D conversions of stress parameters and the operating temperature ginseng of detection downhole instrument
Number, reduces number of chips used in system, largely simplifies the structure of circuit.
（4）Data storage circuitry：Data storage circuitry by by the data after single-chip microcomputer computing and compensation deals and
Corresponding timescale data is stored in FLASH memory.Storage chip selects Numonyx companies N25Q128 chips
（5）Serial communication circuit：Serial communication circuit is the interface circuit that tester exchanges data with host computer.
（6）Power circuit：Power circuit is using Large Copacity High Temperature Lithium Cell as main power source, from power supply chip ADP7102
Main power voltage is handled.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (10)
1. the lateral force tester of oil well rod tube, it is characterised in that:
Including sealing sheath, matrix sheath, for measuring the side force detection part of side force between R a T, fastening
Part, in addition to the ware circuit electrically connected with side force detection part, the inspection of ware circuit reception processing side force
Survey detection signal and and upper machine communication that part is sent；
Matrix sheath is cylindrical structure, including the taper end and butt end being connected respectively with oil pipe；Matrix sheath may connect to two oil
Between pipe, sucker rod can be passed through in the middle of matrix sheath；
Sealing sheath is enclosed on outside the taper end of matrix sheath, close provided with two grades of O-rings between the taper end of sealing sheath and matrix sheath
Envelope, forms a ring packing space for placing ware circuit；
Side force detection part is on the inside of the butt end of matrix sheath, and secure component is installed on the butt end of matrix sheath and offside
Sealing is fixed to power detection part；
Two weeks multiple cuboid side forces parallel to each other above and below being evenly distributed with side force detection part outer wall intermediate region
Block is transmitted, side force transmits the side adhering resistance strain sheets of block, constitutes stress mornitoring point；When side force transmission block is pumped
When the power that bar transmission comes is deformed upon, resistance strain gage thereon is also deformed upon therewith, causes the change of resistance strain gage resistance
Change；
Ware circuit is electrically connected with resistance strain gage, is received the change in resistance of resistance strain gage and is calculated side force.
2. according to the lateral force tester of oil well rod tube described in claim 1, it is characterised in that：The taper end of matrix sheath is provided with
The Internal Pipe Thread connection of UPTBG external pipe threads and oil pipe；Outer tube of the butt end of matrix sheath provided with UPTBG Internal Pipe Threads and oil pipe
Threaded connection.
3. according to the lateral force tester of oil well rod tube described in claim 1, it is characterised in that：The taper end internal diameter of described matrix sheath
Size is more than tubing size, to ensure that the normal friction between side force detection part and sucker rod is contacted.
4. according to the lateral force tester of oil well rod tube described in claim 1, it is characterised in that：Side force detection part bosom
Position is provided with annular region wide 9 ~ 10mm, and the inner ring radius of side force detection part is less than two ends radius, lateral to ensure
Power detection part is contacted with the normal friction of sucker rod.
5. according to the lateral force tester of oil well rod tube described in claim 1, it is characterised in that：In the middle of side force detection part outer wall
Two weeks parallel to each other 4 cuboid side force transmission blocks above and below being evenly distributed with region, two neighboring side force transmits block
Angle be 90 °.
6. according to the lateral force tester of oil well rod tube described in claim 1, it is characterised in that：Ware circuit is examined including signal
Survey bridge, signal conditioning circuit, main control circuit, data storage circuitry, serial communication circuit and power circuit；The signal
Detection bridge is connected by signal conditioning circuit with governor circuit, the data storage circuitry and serial communication circuit respectively with master
Control circuit connection, the power circuit and signal detection bridge, signal conditioning circuit, main control circuit, data storage circuitry,
Serial communication circuit connection power supply.
7. according to the lateral force tester of oil well rod tube described in claim 6, it is characterised in that：The signal detection bridge is using half
Bridge-type is connected, and 2 that 2 sides of each side force transmission block are respectively pasted on 1 sheet resistance foil gauge, same side force transmission block should
Become piece to be connected in series, the foil gauge of the equidirectional transmission blocks of 2 side forces up and down of side force detection part is also connected in series, altogether 4
Sheet resistance foil gauge is connected in series what is be connected in series on a bridge arm, with relative direction constituting half bridge circuit by other 4
Another bridge wall of resistance strain gage composition realizes that semibridge system is connected.
8. according to the lateral force tester of oil well rod tube described in claim 6, it is characterised in that：The signal conditioning circuit includes instrument
Table amplifier and the difference RC filter circuits for being arranged at instrument amplifier front end.
9. a kind of lateral force test method of oil well rod tube of the lateral force tester of oil well rod tube described in utilization claim 1, including： 1
Each side force is gathered by side force detection part to transmit pressure that block bears and transmit to ware circuit, hardware circuit system
System judges lateral force direction according to the position angle for the two neighboring side force transmission block for detecting stress, and according to stress
Pressure that two neighboring side force transmission block is born and, and between two adjacent side power transmission blocks angle supplementary angle
Calculate it to make a concerted effort, as oil well rod tube side force.
10. according to the lateral force test method of oil well rod tube described in claim 9, it is characterised in that：When two neighboring side force is passed
When the angle for passing block is 90 °, oil well rod tube side force. 2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710307414.2A CN107063524B (en) | 2017-05-04 | 2017-05-04 | Oil well rod pipe lateral force tester and testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710307414.2A CN107063524B (en) | 2017-05-04 | 2017-05-04 | Oil well rod pipe lateral force tester and testing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107063524A true CN107063524A (en) | 2017-08-18 |
| CN107063524B CN107063524B (en) | 2020-01-03 |
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ID=59597695
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710307414.2A Active CN107063524B (en) | 2017-05-04 | 2017-05-04 | Oil well rod pipe lateral force tester and testing method |
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| Country | Link |
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| CN (1) | CN107063524B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959476A (en) * | 2019-03-28 | 2019-07-02 | 浙江大学 | A kind of sucked type pressure sensor and preparation method thereof |
| CN110132473A (en) * | 2019-05-21 | 2019-08-16 | 中国石油大学(华东) | Moment of flexure measuring mechanism and measurement method, sucker rod moment of flexure measuring device and measuring method |
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| Publication number | Publication date |
|---|---|
| CN107063524B (en) | 2020-01-03 |
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