CN110513082A - A kind of motor protecter and the tubing string comprising it - Google Patents
A kind of motor protecter and the tubing string comprising it Download PDFInfo
- Publication number
- CN110513082A CN110513082A CN201810488374.0A CN201810488374A CN110513082A CN 110513082 A CN110513082 A CN 110513082A CN 201810488374 A CN201810488374 A CN 201810488374A CN 110513082 A CN110513082 A CN 110513082A
- Authority
- CN
- China
- Prior art keywords
- communicating pipe
- motor protecter
- pipe
- suction inlet
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004891 communication Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 14
- 239000011148 porous material Substances 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 17
- 239000012535 impurity Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000017260 vegetative to reproductive phase transition of meristem Effects 0.000 description 1
Classifications
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/128—Adaptation of pump systems with down-hole electric drives
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention proposes a kind of motor protecter and include its tubing string; the motor protecter includes suction inlet and communicating pipe for being sealingly located at suction inlet; the free end opening of communicating pipe can be in communication with the outside; enable motor protecter and thin oil regional connectivity; to avoid viscous crude from blocking suction inlet, the service life of motor protecter is thus improved.
Description
Technical field
The present invention relates to oil/gas well downhole tool technical fields, and in particular to a kind of motor protecter and the pipe comprising it
Column.
Background technique
During oil exploitation, by the tubing string tripping in oil well with electric submersible pump and centrifugal multistage pump multiple centrifugal pump, pass through ground
Electrical energy transportation to downhole electrical motor and is driven centrifugal pump to rotate by transformer, control cabinet and power cable, so that down-hole liquid is lifted
It is raised to ground.It is high-efficient currently, electric submersible pump is due to big with discharge capacity, land occupation less and it is convenient for management the features such as, be used as one kind
Important oil production method is applied in the production of oil field.And in order to guarantee the normal work of electric submersible pump, in the motor peripheral hardware of electric submersible pump
It is equipped with motor protecter.In the actual production process, it is often found that motor protecter often damages.
Therefore, it invents a kind of motor protecter that can be improved service life and is assistant officer's technology to be solved comprising its tubing string
Problem.
Summary of the invention
For some or all of of the above-mentioned technical problem in the presence of the prior art, the invention proposes a kind of motors
Protector and tubing string comprising it.By the way that communicating pipe is arranged at the suction inlet of the motor protecter, so that motor protecter
, so that viscous crude be avoided to block suction inlet, the service life of motor protecter can be thus improved with thin oil regional connectivity.
According to an aspect of the invention, it is proposed that a kind of motor protecter, comprising:
Suction inlet,
The free end opening of the communicating pipe being sealingly located at suction inlet, communicating pipe can be in communication with the outside.
In one embodiment, joint assembly is set between suction inlet and communicating pipe, and joint assembly includes
Tubular body, tubular body first end are connect with suction inlet,
It is set in the pipe sleeve of the second end outer wall of tubular body, the first end of pipe sleeve is fixedly connected with tubular body, and the
Two ends are configured to circumferentially spaced elastic slice and spaced radial formula surrounds tubular body to form the first end for accommodating communicating pipe
Annular space,
The lock sleeve being set on pipe sleeve outer wall, the second end of lock sleeve is axially overlapped on elastic slice so that lock sleeve exists
Elastic slice radial motion is limited when moving axially along casing.
In one embodiment, limiting section is arranged in protruding-type on the inner wall of elastic slice, and sets on the outer wall of communicating pipe
Set the limiting slot that can cooperate with limiting section.
In one embodiment, limiting section is configured to the dentation being obliquely extended to the first extreme direction.
In one embodiment, the accommodating case that communicating pipe is truncated, the bottom wall of accommodating case is arranged in communication type on communicating pipe
Lower than accommodating case and the communication port being connected to that section of communicating pipe for being in first end.
In one embodiment, pit is set on the inner wall of accommodating case.
In one embodiment, the inside and outside intercommunicating pore being connected to is provided on the free end outer wall of cross under.
According to another aspect of the invention, it is proposed that a kind of tubing string, comprising:
Oil pipe,
The above-mentioned motor protecter of oil pipe lower end is set,
Wherein, communicating pipe upwardly extends.
It in one embodiment, further include the cross under that the lower end and the outside in motor protecter of oil pipe are set,
The upper shoulder that communicating pipe passes through cross under upwardly extends
In one embodiment, the groove that its bottom surface is configured to the conical surface is set in the through hole that communicating pipe passes through upper shoulder,
Sealing ring is set at the conical surface of groove, and in the outside of sealing ring, setting can make the bolt passed through communicating pipe.
Compared with the prior art, the advantages of the present invention are as follows, communicating pipe is set at the suction inlet of the motor protecter, with
Motor protecter and thin oil regional connectivity is enabled thus to improve electric motor protecting to avoid the problem that viscous crude blocks suction inlet
The service life of device.
Detailed description of the invention
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, in figure:
Fig. 1 shows tubing string according to an embodiment of the invention；
Fig. 2 shows joint assembly according to an embodiment of the invention；
Fig. 3 is enlarged drawing at the A from Fig. 1；
In the accompanying drawings, identical component uses identical appended drawing reference.The attached drawing is not drawn according to the actual ratio.
Specific embodiment
Below in conjunction with attached drawing, the present invention will be further described.
Fig. 1 shows tubing string 100 according to the present invention.As shown in Figure 1, tubing string 100 includes oil pipe 1 and motor protecter 2.
Wherein, oil pipe 1 plays the other components of connection and conveys oil.The lower end of oil pipe 1 is arranged in motor protecter 2, for protecting
The motor of the electric submersible pump of tubing string 100.Motor protecter 2 has suction inlet 21 and expiratory port 22.After in 100 lower going-into-well of tubing string,
Motor protecter 2 maintains pressure balance by sucking or excluding liquid, and then works normally.Specifically, when the electricity of electric submersible pump
When machine temperature increases, liquid is excluded by expiratory port 22 in motor protecter 2；And when the motor temperature of electric submersible pump reduces, electricity
Machine protector 2 sucks liquid by suction inlet 21.In practical oil recovery production process, motor protecter 2 is often damaged and is influenced
It is normal to recover the oil.It studies and finds by inventor: since the oil being drawn into motor protecter 2 by suction inlet 21 is feeding-up, blocking
Suction inlet 21 makes 2 inside and outside differential pressure of motor protecter to become larger, to influence the normal work of motor protecter 2.
According to the present invention, as shown in Figure 1, communicating pipe 3 is arranged, at suction inlet 21 to adjust the area that suction inlet 21 is connected to
The liquid environment in domain guarantees the mobility for entering the liquid at suction inlet 21 preferably to safeguard the pressure in motor protecter 2
Balance.Specifically, one end of communicating pipe 3 is sealingly located at suction inlet 21；The other end is free end, and opening can extend
The region relatively dilute to liquid, to reduce influence of the viscous crude to motor protecter 2.It should be noted that described herein
" thick " and " dilute " is relative concept, is not limited the specific mobility of liquid, as long as can make by communicating pipe 3 into
Enter to the liquid in motor protecter 2 and is directly entered in motor protecter 2 by suction inlet 21 than being not provided with communicating pipe 3
Liquid is more beneficial to motor protecter 2, each falls in the protection scope of the application.
In one embodiment, joint assembly 4 is set between suction inlet 21 and communicating pipe 3.As shown in Fig. 2, the connector
Component 4 has tubular body 41, pipe sleeve 42 and lock sleeve 43.Wherein, the first end (left end in Fig. 2) of tubular body 41 and suction
Entrance 21 connects.For example, tubular body 41 can be threadedly coupled with suction inlet 21.Casing 42 is set in the second end of tubular body
On outer wall.Wherein, one section of the first end of pipe sleeve 42 is fixedly connected with tubular body 41.The second end of casing 42 is configured to elastic slice
45, radially, elastic slice 45 and tubular body 41 are spaced to form the annular space 46 for accommodating communicating pipe 3.The elastic slice 45 construction
For circumferentially-spaced formula distribution at least two panels, for example, in the circumferential be four.The casing 42 is integrated, elastic slice 45 and place
Pass through the curved surface 47 being obliquely extended in that section of first end to connect.Lock sleeve 43 is arranged on the outer wall of pipe sleeve 42.The lock sleeve
43 first end is threadedly coupled with pipe sleeve 42, and second end is radially projecting and is axially overlapped on the outer wall of elastic slice 45.Work as lock sleeve
43 along casing 42 it is axial mobile to second end (right end in Fig. 2) direction when, lock sleeve 43 provides radial force so that bullet
The radial tightening of piece 45, so that clamping is inserted into the communicating pipe 3 in annular space 46.On the contrary, if lock sleeve 43 is along casing 42
When axial mobile to the first extreme direction, lock sleeve 43 is released to the position restriction of elastic slice 45, at this point it is possible to by communicating pipe 3 from ring
It is taken out in sky 46.Suction inlet 21 can be easily carried out by setting joint assembly 4 to connect and tear open with the quick of communicating pipe 3
It unloads.Also, joint assembly 4 has the advantages of simple structure and easy realization.
In one embodiment, as shown in Fig. 2, limiting section 48 is arranged in protruding-type on the inner wall of elastic slice 45.Meanwhile even
The limiting slot (not shown) of indent is set on the outer wall of siphunculus 3.After communicating pipe 3 is inserted into annular space 46, limiting section
48 cooperate radially into limiting slot and with it, so that communicating pipe 3 be prevented to fall off out of annular space 46.Preferably, 48 structure of limiting section
Make the dentation to be obliquely extended to the first extreme direction.It is further preferred that limiting section 48 is configured to be arranged in elastic slice 45 in circumferential direction
Inner wall on protrusion ring (disconnecting at the interval location of elastic slice 45).This mode can not only guarantee clamping communicating pipe 3,
The sealing between communicating pipe 3 and joint assembly 4 can also be improved.In axial direction, multiple limits can be set on the inner wall of elastic slice 45
Position portion 48, for guaranteeing the connective stability of communicating pipe 3 Yu joint assembly 4.
As shown in Figure 1, accommodating case 5 is arranged on communicating pipe 3.The truncation of communicating pipe 3 is passed through accommodating case 5 by the accommodating case 5
The first segment 32 and second segment 33 of connection.Preferably, first segment 32 and second segment 33 not in the same axial direction so that second segment
Liquid in 33 cannot flow directly into first segment 32.Wherein, it is first segment 32 close to first end, and is close to second end
Second segment 33.The bottom wall of accommodating case 5 is lower than the communication port that accommodating case 5 is connected to first segment 32.In the course of work, liquid is remained in
In accommodating case 5, and first segment 32 sucks liquid by the relatively high liquid level of accommodating case 5.Even if entering the liquid in communicating pipe 3
Contain impurity in body, can also be deposited in accommodating case 5 without entering in first segment 32.It is heavy to be played by setting accommodating case 5
The effect of product impurity, avoids or reduces the risk blocked communicating pipe 3.It is further preferred that on the inner wall of accommodating case 5
Pit (not shown) is set.The liquid that the pit improves in impurity deposition effect, especially accommodating case 5 is agitated
When, impurity is also not easy to be taken up, and enters in first segment 32 to further avoid impurity and finally ensure that electric motor protecting
The operational safety of device 2.
In one embodiment, the inside and outside intercommunicating pore being connected to is provided on the free end outer wall of communicating pipe 3 (not show in figure
Out).The intercommunicating pore increases the area of passage of communicating pipe 3 Yu external environment, to reduce the risk blocked communicating pipe 3, mentions
The high service life of motor protecter 2.
As shown in Figure 1, the tubing string 100 further includes cross under 6.The cross under 6 is fixedly connected with oil pipe 1, and is circumferentially surrounded
The setting of 2 formula of motor protecter.In oil recovery process, it is sometimes necessary to carry out mixing dilute production, it is, passing through 8 note of oil jacket annulus
Enter thin oil.Thin oil is entered after mixing with viscous crude in well in the inner cavity of cross under 6.In the inner cavity of cross under 6, electric submersible pump running
And lift oil and enter in oil pipe 1, arrow illustrates the direction of motion of oil in figure.In this case, communicating pipe 3 upwardly extends
And the sealed upper shoulder across bridge tube 6.To be the dilute of injection by the oil that suction inlet 21 enters in motor protecter 2
Oil avoids viscous crude and enters suction inlet 21, and thus reduces the possibility that motor protecter 2 is blocked.In this case, even
Intercommunicating pore on siphunculus 3 is respectively positioned on the upper end of the upper shoulder 60 of cross under 6, to guarantee to enter the oil in communicating pipe 3 as thin oil.
And in the case where being provided with cross under 6, in order to which accommodating case 5 has enough installation spaces, accommodating case 5, which can be set, is appearing on the stage
Between intercommunicating pore on shoulder 60 and communicating pipe 3.
Thin oil enters the inner cavity of cross under 6 by upper shoulder 60 in order to prevent, and guarantee upper shoulder 60 is close with communicating pipe 3
Envelope is arranged with flowering structure.Specifically, as shown in figure 3, groove 61 is arranged in the through hole for passing through upper shoulder 60 communicating pipe 3.This is recessed
The bottom wall of slot 61 is set as the conical surface of indent.Sealing ring 7 is placed at the conical surface of groove 61, and in the outside of sealing ring 7
The bolt 9 that communicating pipe 3 can be made to pass through is placed in groove 61.In 9 screwing operations of bolt, axial force is applied to sealing ring 7, to promote
It is moved into sealing ring 7 and seals the gap between communicating pipe 3 and upper shoulder 60.The sealing ring 7 is made of alloy steel material, can be
Trouble free service in hot environment, and guarantee good sealing effect.As shown in figure 3, the upper and lower surface in upper shoulder 60 is respectively provided with
The groove 61 of indent, and with the matched sealing ring 7 of groove 61 and bolt 9.This set two seals are to increase
Sealing effect avoids liquid channelling.
Above-mentioned sealing structure can be applied in the position that other pipes connect and need to seal.For example, communicating pipe 3 and suction inlet
21 junctions (if communicating pipe 3 and suction inlet 21 are directly connected to) and joint assembly 4 and 21 junction of suction inlet are (if even
Connected between siphunculus 3 and suction inlet 21 by joint assembly 4) etc..And specific connection relationship is that those skilled in the art can be with
Prediction, details are not described herein.
In one embodiment, communicating pipe 3 is metal tube, for example, stainless steel tube, and inner diameter size is 8-10 millimeters.
The setting can guarantee that communicating pipe 3 works normally, and underground high temperature is avoided to influence.
If the distance that communicating pipe 3 extends upper shoulder 60 is too long, communicating pipe 3 can also be installed in by pipe clamp 10
On oil pipe 1, to guarantee the stability of communicating pipe 3.
In the application, the real work orientation of positional terms "upper", "lower" and tubing string 100 is reference.
The above is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, any this field
Technical staff in technical scope disclosed by the invention, can be easy to carry out and be altered or varied, and this be altered or varied all
It is covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection scope of claims
It is quasi-.
Claims (10)
1. a kind of motor protecter characterized by comprising
Suction inlet,
The free end opening of the communicating pipe being sealingly located at the suction inlet, the communicating pipe can be in communication with the outside.
2. motor protecter according to claim 1, which is characterized in that set between the suction inlet and the communicating pipe
Joint assembly is set, the joint assembly includes
Tubular body, the tubular body first end are connect with the suction inlet,
It is set in the pipe sleeve of the second end outer wall of the tubular body, the first end of the pipe sleeve and the fixed company of the tubular body
It connects, and second end is configured to circumferentially spaced elastic slice and spaced radial formula to surround the tubular body described for accommodating to be formed
The annular space of the first end of communicating pipe,
The lock sleeve being set on the pipe sleeve outer wall, the second end of the lock sleeve be axially overlapped on the elastic slice so that
The lock sleeve limits the elastic slice radial motion when moving axially along described sleeve pipe.
3. motor protecter according to claim 2, which is characterized in that the protruding-type setting limit on the inner wall of the elastic slice
Position portion, and the limiting slot that setting can cooperate with the limiting section on the outer wall of the communicating pipe.
4. motor protecter according to claim 3, which is characterized in that the limiting section is configured to oblique to the first extreme direction
To the dentation of extension.
5. motor protecter according to any one of claims 1 to 4, which is characterized in that be connected on the communicating pipe
The accommodating case that the communicating pipe is truncated is arranged in formula, and the bottom wall of the accommodating case is lower than the accommodating case and in that of first end
The communication port that Duan Suoshu communicating pipe is connected to.
6. motor protecter according to claim 5, which is characterized in that pit is arranged on the inner wall of the accommodating case.
7. according to claim 1 to motor protecter described in any one of 6, which is characterized in that in the freedom of the cross under
The inside and outside intercommunicating pore being connected to is provided on the outer wall of end.
8. a kind of tubing string characterized by comprising
Oil pipe,
Be arranged in the oil pipe lower end according to claim 1 to motor protecter described in any one of 7, wherein the company
Siphunculus upwardly extends.
9. tubing string according to claim 8, which is characterized in that further include the lower end of the oil pipe being arranged in and in described
The cross under in the outside of motor protecter, the upper shoulder that the communicating pipe passes through the cross under upwardly extend.
10. tubing string according to claim 9, which is characterized in that pass through the through hole of the upper shoulder in the communicating pipe
The groove that its bottom surface is configured to the conical surface is set, sealing ring is set at the conical surface of the groove, is set on the outside of the sealing ring
Set the bolt that the communicating pipe can be made to pass through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810488374.0A CN110513082B (en) | 2018-05-21 | 2018-05-21 | Motor protector and tubular column that contains it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810488374.0A CN110513082B (en) | 2018-05-21 | 2018-05-21 | Motor protector and tubular column that contains it |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110513082A true CN110513082A (en) | 2019-11-29 |
| CN110513082B CN110513082B (en) | 2022-04-01 |
Family
ID=68622028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810488374.0A Active CN110513082B (en) | 2018-05-21 | 2018-05-21 | Motor protector and tubular column that contains it |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110513082B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110513082B (en) | 2022-04-01 |
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