CN105257227A - Rigid centralizer - Google Patents
Rigid centralizer Download PDFInfo
- Publication number
- CN105257227A CN105257227A CN201510751290.8A CN201510751290A CN105257227A CN 105257227 A CN105257227 A CN 105257227A CN 201510751290 A CN201510751290 A CN 201510751290A CN 105257227 A CN105257227 A CN 105257227A
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- pin shaft
- centralizer
- shaft hole
- bodies
- junction plate
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Abstract
The invention discloses a rigid centralizer, which adopts a split type structure and comprises a first half centralizer body and a second half centralizer body. The rigid centralizer can be installed on equal-diameter rod and tube, and also can be installed on variable-diameter rod and tube; in addition, the two half centralizer bodies of the rigid centralizer are connected by using a connecting plate and a pin shaft, and especially the combination use of the pin shaft and an elastic stop collar enables the installation of a tool to be more convenient and reliable. The rigid centralizer has the advantages of good centralization effect, small resistance generated on flowing-through fluid, and capability of reducing the friction of the rod and tube in a tripping-in process.
Description
Technical field
The application relates to oil exploration technology field, particularly relates to a kind of rigid centralizer.
Background technology
Enter in well process at rod tube, in order to make rod tube placed in the middle in pit shaft, being beneficial to follow-up construction or production, often on rod tube, centralizer will being installed, especially in horizontal well or high angle hole, selecting rigid centralizer more.
Existing rigid centralizer comprises: Integral type roller centralizer, three spiral centering devices, casing tube roller centralizer, eccentric roller type rigid centralizer for casing, rigid spiral idler centralizer, the low friction resistance rigid casing centralizer of roller type etc.
These centralizers all adopt monolithic construction, be connected in the middle of rod tube or be enclosed within rod tube during installation.
But some rod tube belongs to reducing rod tube, its integral diameter is not identical, such as longer sand control screen etc., is the reducer pipe that two ends diameter is large, mid diameter is little.For the rod tube of this type, existing rigid centralizer cannot be arranged in the middle part of rod tube, therefore needs to develop a kind of rigid centralizer, can play support and centralizing function to this type rod tube.
Summary of the invention
Invention provides a kind of rigid centralizer, to solve the righting problem of reducing rod tube.
For solving the problems of the technologies described above, the invention provides a kind of rigid centralizer, comprising:
The first half centralizer body, twist semi-circular cylindrical, the external surface of described the first half centralizer bodies offer the first spiral vertically and lead rib; Described the first half centralizer bodies are along the circumferential direction processed with the first rectangular channel near both ends of the surface, and described the first half centralizer bodies are provided with the first pin shaft hole vertically, and described first pin shaft hole is through described first rectangular channel;
The second half centralizer bodies, semi-circular cylindrical twist, the external surface of described the second half centralizer bodies offers the second spiral vertically and leads rib, described the second half centralizer bodies are along the circumferential direction processed with the second rectangular channel near both ends of the surface, and translot is opened in described second spiral and leads on rib; Described the second half centralizer bodies are provided with the second pin shaft hole vertically, and described second pin shaft hole is through described second rectangular channel and described translot;
Junction plate, in circular arc, the Part I of described junction plate is built in described first rectangular channel, and the Part II of described junction plate is built in described second rectangular channel; The Part I of described junction plate is provided with the 3rd pin shaft hole, described 3rd pin shaft hole and described first pin shaft hole correspondence; The Part II of described junction plate is provided with the 4th pin shaft hole, described 4th pin shaft hole and described second pin shaft hole correspondence;
Circlip, is built in described translot;
Bearing pin, through described first pin shaft hole and described 3rd pin shaft hole, with the Part I of fixing described junction plate and described the first half centralizer bodies; Described bearing pin also through described second pin shaft hole, described circlip, described 4th pin shaft hole, with the Part II of fixing described junction plate and described the second half centralizer bodies.
Preferably, described first spiral is led rib and is provided with the first blind hole, is provided with the first inner sleeve in described first blind hole, is mounted with rolling element in described first inner sleeve;
Described second spiral is led rib and is provided with the second blind hole, is provided with the second inner sleeve in described second blind hole, is mounted with described rolling element in described second inner sleeve.
Preferably, described rolling element comprises steel ball.
Preferably, described bearing pin comprises: fixed pin shaft and active pin shaft.
Preferably, described fixed pin shaft is equal diameter bearing pin.
Preferably, described active pin shaft is multidiameter;
The diameter of the front end of described active pin shaft is less than the diameter of described second pin shaft hole, and the diameter of the rear end of described active pin shaft is larger than the diameter of described second pin shaft hole.
Preferably, the external surface of described active pin shaft circumferentially offers first ring connected in star and the second annular groove.
By one or more technical scheme of the present invention, the present invention has following beneficial effect or advantage:
The present invention devises a kind of rigid centralizer, and this centralizer have employed split-type structural, comprises the first half centralizer bodies, the second half centralizer bodies, both can be arranged on equal diameter rod tube, and also can be arranged on variable diameters rod tube; In addition, two and half centralizer body junction plate and pinned connection of rigid centralizer, especially the combinationally using of bearing pin and circlip, make the installation of instrument more reliably easy.This rigid centralizer have effective, that the fluid that flows through the is produced resistance of righting little, rod tube can be reduced under enter the advantages such as frictional resistance in process.
Further, two and half centralizer bodies of rigid centralizer are designed with rolling element, rely on the rolling of rolling element, enter the mill resistance in process under rod tube can be reduced, improve the application life of rod tube.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of rigid centralizer in the embodiment of the present invention;
Fig. 2 is rigid centralizer transverse cross-sectional view in the embodiment of the present invention;
Fig. 3 is the front view of the embodiment of the present invention the second half centralizer body;
Fig. 4 is the rear view of the embodiment of the present invention the second half centralizer body;
Fig. 5 is the structural representation of embodiment of the present invention active pin shaft.
Description of reference numerals: the first half centralizer bodies 1, the second half centralizer body 2, junction plate 3, first inner sleeve 4, steel ball 5, fixed pin shaft 6, circlip 7, active pin shafts 8, second rectangular channel 9, translot 10, first ring connected in star 11, second annular groove 12, rib 13 led by first spiral, the first pin shaft hole 14, first rectangular channel 15.
Detailed description of the invention
The rigid centralizer of the present invention's design can be sleeved on reducing rod tube, on the rod tube that especially two ends diameter is large, mid diameter is little, plays centralizing function to entering well rod tube.
In order to make the application the technical staff in the technical field more clearly understand the application, below in conjunction with accompanying drawing, by specific embodiment, technical scheme is described in detail.
Please refer to Fig. 1, is the overall structure schematic diagram of a kind of rigid centralizer provided by the invention.
Specifically, rigid centralizer of the present invention comprises:
The first half centralizer body 1, twist semi-circular cylindrical.Please refer to Fig. 1-Fig. 2.
The external surface of the first half centralizer bodies 1 offers the first spiral vertically and leads rib 13.The number that rib 13 led by first spiral is indefinite, and the present invention does not limit this.Further, first spiral is led rib 13 and is provided with the first blind hole, the first inner sleeve 4 is provided with in first blind hole, rolling element is mounted with in first inner sleeve 4, such design, make rod tube under enter in process to rely on the rolling of rolling element, enter the mill resistance in process under rod tube can be reduced, improve the application life of rod tube.Rolling element is including but not limited to being steel ball 5.
Specifically, because the external surface of the first half centralizer bodies 1 has excavated the axial groove of spiral, and the part do not utilized just protrudes formation first spiral leads rib 13.Therefore, in the first half centralizer bodies 1, the first pin shaft hole 14 is just preferably opened in the part that rib 13 led by the first spiral.In addition, the first half centralizer bodies 1 are along the circumferential direction processed with the first rectangular channel 15 near both ends of the surface, helicoid transverse intersection with the first half centralizer bodies 1, can connect with the second rectangular channel 9, forms overall rectangular channel and the first rectangular channel 15 transverse cuts the first spiral leads one in rib 13.
In addition, the first half centralizer bodies 1 be provided with the first pin shaft hole 14, first pin shaft hole 14 vertically can through the first rectangular channel 15.Preferably, the first pin shaft hole 14 preferably can be opened in the part that rib 13 led by the first spiral, because have the first spiral to lead the segment thickness of rib 13 comparatively greatly, is convenient to pore-forming.
The similar of the structure of the second half centralizer bodies 2 and the first half centralizer bodies 1.Second spiral is led on rib and is also provided with the second blind hole, is provided with the second inner sleeve in the second blind hole, is mounted with rolling element in the second inner sleeve, such design, make rod tube under enter in process to rely on the rolling of rolling element, enter the mill resistance in process under rod tube can be reduced, improve the application life of rod tube.Rolling element is including but not limited to being steel ball 5.
Specifically, the second half centralizer body 2 semi-circular cylindrical twist, the external surface of the second half centralizer bodies 2 offer the second spiral vertically and lead rib.Certainly, the present invention does not limit the number that rib led by the second spiral yet.And the second spiral leads the structure of rib and the first spiral, and to lead rib 13 similar, repeats no more in this present invention.
The second half centralizer bodies 2 are along the circumferential direction processed with the second rectangular channel 9 near both ends of the surface.Specifically, the second rectangular channel 9 and the first rectangular channel 15 similar, and two rectangular channels can connect, by placing junction plate 3.Specifically please refer to Fig. 3-Fig. 4, is front view and the rear view of the second half centralizer bodies 2 respectively.As can be seen here, the second rectangular channel 9 is at one that adds transverse cuts in man-hour second spiral and lead in rib.
The difference of the structure of the structure of the second half centralizer bodies 2 and the first half centralizer bodies 1 is: the second spiral is led on rib and offered translot 10.Translot 10 is opened in second spiral with the second pin shaft hole and leads on rib, and the second pin shaft hole is divided into two sections.Translot 10 and the second rectangular channel 9 be arranged in parallel.But the width of translot 10 is less than the width of the second rectangular channel 9.Translot 10 is mainly used in placing circlip 7.
For circlip 7, middle part needs to offer the hole passed for bearing pin.
In addition, the second half centralizer bodies 2 are provided with the second pin shaft hole vertically.Second pin shaft hole crosses the second rectangular channel 9 and translot 10.Preferably, the second pin shaft hole also preferably can be opened in the part that rib led by the second spiral.
Junction plate 3 is in circular arc.
The Part I of junction plate 3 is built in the first rectangular channel 15, and the Part II of junction plate 3 is built in the second rectangular channel 9.The width of the Part I of junction plate 3 is less than the width of the first rectangular channel 15, the width of the Part II of junction plate 3 is less than the width of the second rectangular channel 9, thus, can using junction plate 3 as connector, the first half centralizer bodies 1 and the second half centralizer body 2 two parts are coupled together.
In addition, the Part I of junction plate 3 is provided with the 3rd pin shaft hole, the 3rd pin shaft hole and the first pin shaft hole 14 correspondence; The Part II of junction plate 3 is provided with the 4th pin shaft hole, the 4th pin shaft hole and the second pin shaft hole correspondence.After junction plate 3 puts into rectangular channel, its pin shaft hole and two pin shaft holes are corresponding respectively.Bearing pin now can be used to be connected with the first centralizer body 1, the second half centralizer bodies 2 respectively by junction plate 3.
Specifically, bearing pin through the first pin shaft hole 14 and the 3rd pin shaft hole, with the Part I of fixed connecting plate 3 and the first half centralizer bodies 1; Bearing pin also through the second pin shaft hole, circlip, the 4th pin shaft hole, with the Part II of fixed connecting plate 3 and the second half centralizer bodies 2.
Lower mask body introduces bearing pin.
Bearing pin comprises fixed pin shaft 6 and active pin shaft 8.
Fixed pin shaft 6 is equal diametral axis.
Active pin shaft 8 is one and straightens journal axle, as shown in Figure 5.The diameter of the front end of active pin shaft 8 is less than the second pin shaft hole, and the diameter of the rear end of active pin shaft 8 is larger than the second pin shaft hole.In addition, the external surface of active pin shaft 8 circumferentially offers first ring connected in star 11 and the second annular groove 12.The width of two annular grooves is slightly wider than circlip 7,
Circlip 7 has good elasticity, and has opening, its effect be stuck in active pin shaft 8 first ring connected in star 11 or the second annular groove 12 in, prevent active pin shaft 8 from exiting in the second pin shaft hole.
When centralizer pre-installation, after the part of active pin shaft 8 penetrates the second pin shaft hole, circlip 7 is stuck in the first ring connected in star 11 of active pin shaft 8 front end; After centralizer is in place, active pin shaft 8 penetrates the second pin shaft hole completely, and circlip 7 is stuck in the second annular groove 12 of active pin shaft 8 rear end.
Please refer to Fig. 1 below so that the mounting means of centralizer of the present invention to be described.
During centralizer assembling, first junction plate 3 is put into the first rectangular channel 15 of the first half centralizer bodies 1, and in the second rectangular channel 9 of the second half centralizer bodies 2, can relatively rotate between junction plate 3 and the first half centralizer bodies 1 and the second half centralizer bodies 2.Fixed pin shaft 6 is loaded in the first pin shaft hole 14.Fixed pin shaft 6 and the first half centralizer bodies 1 adopt screw thread or welding manner to fix.Circlip 7 is put in translot 10, and active pin shaft 8 is inserted the second pin shaft hole, circlip 7 is made to be stuck in first ring connected in star 11 place of active pin shaft 8 front end, as shown in Figure 3, now the front end of active pin shaft 8 does not enter in the second rectangular channel 9 on the second half centralizer bodies 2, and junction plate 3 can not be interfered to pass in and out the second rectangular channel 9.
When centralizer uses, outwards open from the side of dress active pin shaft 8 by the first half centralizer bodies 1 and the second half centralizer bodies 2, be enclosed within rod tube, after the first half centralizer bodies 1 and the second half centralizer bodies 2 fasten, junction plate 3 is rotated in the second rectangular channel 9, active pin shaft 8 is pushed inward, after active pin shaft 8 pushes the second pin shaft hole completely, circlip 7 is stuck in the second annular groove 12 of active pin shaft 8 rear end, prevents active pin shaft 8 from deviating from from the second pin shaft hole, completes the installation of centralizer.
By one or more embodiment of the present invention, the present invention has following beneficial effect or advantage:
The present invention devises a kind of rigid centralizer, and this centralizer have employed split-type structural, comprises the first half centralizer bodies, the second half centralizer bodies, both can be arranged on equal diameter rod tube, and also can be arranged on variable diameters rod tube; In addition, two and half centralizer body junction plate and pinned connection of rigid centralizer, especially the combinationally using of bearing pin and circlip, make the installation of instrument more reliably easy.This rigid centralizer have effective, that the fluid that flows through the is produced resistance of righting little, rod tube can be reduced under enter the advantages such as frictional resistance in process.
Further, two and half centralizer bodies of rigid centralizer are designed with rolling element, rely on the rolling of rolling element, enter the mill resistance in process under rod tube can be reduced, improve the application life of rod tube.
Although described the preferred embodiment of the application, one of ordinary skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the application's scope.
Obviously, those skilled in the art can carry out various change and modification to the application and not depart from the spirit and scope of the application.Like this, if these amendments of the application and modification belong within the scope of the application's claim and equivalent technologies thereof, then the application is also intended to comprise these change and modification.
Claims (7)
1. a rigid centralizer, is characterized in that, comprising:
The first half centralizer body, twist semi-circular cylindrical, the external surface of described the first half centralizer bodies offer the first spiral vertically and lead rib; Described the first half centralizer bodies are along the circumferential direction processed with the first rectangular channel near both ends of the surface, and described the first half centralizer bodies are provided with the first pin shaft hole vertically, and described first pin shaft hole is through described first rectangular channel;
The second half centralizer bodies, semi-circular cylindrical twist, the external surface of described the second half centralizer bodies offers the second spiral vertically and leads rib, the end face of described the second half centralizer bodies is along the circumferential direction processed with the second rectangular channel, and translot is opened in described second spiral and leads on rib; Described the second half centralizer bodies are provided with the second pin shaft hole vertically, and described second pin shaft hole is through described second rectangular channel and described translot;
Junction plate, in circular arc, the Part I of described junction plate is built in described first rectangular channel, and the Part II of described junction plate is built in described second rectangular channel; The Part I of described junction plate is provided with the 3rd pin shaft hole, described 3rd pin shaft hole and described first pin shaft hole correspondence; The Part II of described junction plate is provided with the 4th pin shaft hole, described 4th pin shaft hole and described second pin shaft hole correspondence;
Circlip, is built in described translot;
Bearing pin, through described first pin shaft hole and described 3rd pin shaft hole, with the Part I of fixing described junction plate and described the first half centralizer bodies; Described bearing pin also through described second pin shaft hole, described circlip, described 4th pin shaft hole, with the Part II of fixing described junction plate and described the second half centralizer bodies.
2. centralizer as claimed in claim 1, is characterized in that,
Described first spiral is led rib and is provided with the first blind hole, is provided with the first inner sleeve in described first blind hole, is mounted with rolling element in described first inner sleeve;
Described second spiral is led rib and is provided with the second blind hole, is provided with the second inner sleeve in described second blind hole, is mounted with described rolling element in described second inner sleeve.
3. centralizer as claimed in claim 2, it is characterized in that, described rolling element comprises steel ball.
4. centralizer as claimed in claim 1, it is characterized in that, described bearing pin comprises: fixed pin shaft and active pin shaft.
5. centralizer as claimed in claim 4, it is characterized in that, described fixed pin shaft is equal diameter bearing pin.
6. centralizer as claimed in claim 4, it is characterized in that, described active pin shaft is multidiameter;
The diameter of the front end of described active pin shaft is less than the diameter of described second pin shaft hole, and the diameter of the rear end of described active pin shaft is larger than the diameter of described second pin shaft hole.
7. centralizer as claimed in claim 6, it is characterized in that, the external surface of described active pin shaft circumferentially offers first ring connected in star and the second annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510751290.8A CN105257227B (en) | 2015-11-06 | 2015-11-06 | A kind of rigid centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510751290.8A CN105257227B (en) | 2015-11-06 | 2015-11-06 | A kind of rigid centralizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105257227A true CN105257227A (en) | 2016-01-20 |
| CN105257227B CN105257227B (en) | 2017-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510751290.8A Active CN105257227B (en) | 2015-11-06 | 2015-11-06 | A kind of rigid centralizer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345475A (en) * | 2017-06-14 | 2017-11-14 | 西南石油大学 | Resilient balls centralizer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2627198Y (en) * | 2003-07-07 | 2004-07-21 | 大庆鑫盛化工股份合作公司 | Rotating centralizer for pumping rod |
| CN201090151Y (en) * | 2007-08-15 | 2008-07-23 | 李凡 | Sucker rod clamping centralizer |
| CN201705232U (en) * | 2010-04-12 | 2011-01-12 | 杜庆臻 | Clamp sucker rod centralizer with abrasion-resistant centralizing sleeve |
| CN101994489A (en) * | 2009-08-25 | 2011-03-30 | 罗绍东 | Stopper for sucker rod centralizer |
| CN102287146A (en) * | 2011-08-30 | 2011-12-21 | 濮阳市东方龙机械制造有限公司 | Oil pipe stabilizer and application method |
| CN203223186U (en) * | 2013-05-07 | 2013-10-02 | 中国石油化工股份有限公司 | Latch-type underground pipeline protector |
-
2015
- 2015-11-06 CN CN201510751290.8A patent/CN105257227B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2627198Y (en) * | 2003-07-07 | 2004-07-21 | 大庆鑫盛化工股份合作公司 | Rotating centralizer for pumping rod |
| CN201090151Y (en) * | 2007-08-15 | 2008-07-23 | 李凡 | Sucker rod clamping centralizer |
| CN101994489A (en) * | 2009-08-25 | 2011-03-30 | 罗绍东 | Stopper for sucker rod centralizer |
| CN201705232U (en) * | 2010-04-12 | 2011-01-12 | 杜庆臻 | Clamp sucker rod centralizer with abrasion-resistant centralizing sleeve |
| CN102287146A (en) * | 2011-08-30 | 2011-12-21 | 濮阳市东方龙机械制造有限公司 | Oil pipe stabilizer and application method |
| CN203223186U (en) * | 2013-05-07 | 2013-10-02 | 中国石油化工股份有限公司 | Latch-type underground pipeline protector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345475A (en) * | 2017-06-14 | 2017-11-14 | 西南石油大学 | Resilient balls centralizer |
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| Publication number | Publication date |
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| CN105257227B (en) | 2017-10-17 |
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