CN103306640B - Rodless pump oil extraction system fluid power paraffin removal unit - Google Patents
Rodless pump oil extraction system fluid power paraffin removal unit Download PDFInfo
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- CN103306640B CN103306640B CN201310277537.8A CN201310277537A CN103306640B CN 103306640 B CN103306640 B CN 103306640B CN 201310277537 A CN201310277537 A CN 201310277537A CN 103306640 B CN103306640 B CN 103306640B
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Abstract
A kind of rodless pump oil extraction system fluid power paraffin removal unit.Main purpose is to provide a kind of high-efficient cleaning wax apparatus that the hydraulic power of liquid stream lifting in tubing string can be utilized to drive, to realize the removing to wax deposition on tubing wall in rodless pump oil extraction system.It is characterized in that: outer is outer tube unit, doctor unit and packing element, bar unit centered by internal layer; Doctor unit adopts four-bar linkage structure and has limited block, central rod unit there are commutation and reducing control structure that doctor unit is had an effect and the mechanism locked by packing element, the annular space area of passage that packing element is formed in oil pipe in order to change paraffin removal unit, control the hydraulic power size that paraffin removal unit bears, realize rise and fall; By the relative position of center-pole and limited block, control scraper open after wax removal external diameter, realize gradation wax removal step by step.This kind of paraffin removal unit is without the need to additionaling power, and can realize gradation wax removal step by step, wax removal diameter is controlled flexibly, reduces the labour intensity of workman, improves the operating efficiency of wax removal.
Description
Technical field
The present invention relates to a kind of downhole tool be applied in petroleum gas engineering field, can be used for the removing operation of rodless pump oil extraction system tube inner wall wax deposition.
Background technology
China produce crude oil more than 80% be waxy crude oil, wax deposit be long-standing problem waxy crude oil exploitation thorny problem, the wax control brought because of wax deposit problem and wax removal cost also high.The main constituent of oil is the hydrocarbon of various component, wherein be dissolved with a certain amount of paraffin, in recovery process, along with the reduction of temperature, pressure and the precipitation of gas, the solvability of crude oil to wax starts to reduce, the paraffin dissolved just is separated out with crystalline solid, through overbunching, is finally deposited on the solid phase surfaces such as tube wall.Mechanical paraffin removal is a kind of conventional dewaxing method, refers to the wax struck off by special paraffin scraper or paraffin bit on tubing wall, and with crude stream, wax is brought to the dewaxing method on ground.The mechanical paraffin removal of rodless pump well utilizes ground winch, by pulley by paraffin removal tool under lubricator in oil pipe, and up and down at tubing wax position by winch, wax deposition is struck off, carries out pit shaft by crude stream.Compared with other wax removal mode, mechanical paraffin removal is polluted reservoir not, and convenient management is simple to operate.But because paraffin removal tool external diameter is fixed, and be limited to lubricator height, weighted lever limited mass, when wax deposition is serious, paraffin removal tool is difficult in lower going-into-well, be that practical significance attacks wax process by normal wax removal process evolution, namely need artificial handling steel wire repeatedly, under the effect of the downward impact force produced at paraffin scraper, carry out wax removal; In addition, for Daqing oil field, along with the employing of polymer flooding mode, poly-drive electric pump well wax deposition speed and obviously accelerate, separate out wax and have higher viscoplasticity, period of removing the wax shortens, and wax removal difficulty increases, and these just cause labor strength obviously to increase.
Summary of the invention
In order to solve the technical problem mentioned in background technology, the invention provides a kind of rodless pump oil extraction system fluid power paraffin removal unit, this kind of paraffin removal unit is without the need to additionaling power, gradation wax removal step by step can be realized, wax removal diameter is controlled flexibly, reduce the labour intensity of workman, improve the operating efficiency of wax removal.
Technical scheme of the present invention is: this kind of rodless pump oil extraction system fluid power paraffin removal unit, is divided into inside and outside double-layer structure, and skin is outer tube unit, doctor unit and righting unit, bar unit centered by internal layer;
Wherein, described outer tube unit is formed after 1 extra sleeve pipe, 2 extra sleeve pipes, 3 extra sleeve pipes, inner cone sleeve pipe and 4 extra sleeve pipes connect, slip ring is fixed with between 1 extra sleeve pipe and 2 extra sleeve pipes, after fixing, described slip ring can outer tube unit rotational relatively, but its axially with outer tube unit without relative motion; Described slip ring has pin hole, is built-in with slip ring pin;
Described doctor unit is made up of scraper, scraper contiguous block and bearing pin; Wherein, scraper contiguous block is two pieces, and the two ends of scraper contiguous block are connected on scraper He on 3 extra sleeve pipes by corresponding bearing pin and form four-bar linkage structure; 3 extra sleeve pipes are positioned at the end section of scraper, have embed for the limited block with lower arcuate surface and run through the passage of outer tube, the outer wall of limited block has the groove for reclaiming spring embedding, described limited block is fixed on 3 extra sleeve pipes by reclaiming spring, after the lower arcuate surface of limited block leaves the inner chamber of 3 extra sleeve pipes, the upper end of limited block and the tail end of scraper touch to realize the restriction to scraper rotational angle; Described righting unit is made up of righting spring slide ring, screw, righting spring leaf and righting spring retainer ring, and described righting unit is fixed on 3 extra sleeve pipes; Described central rod unit is made up of upper center-pole and lower center-pole; The top of upper center-pole is fishing head, part under fishing head is commutation and reducing control structure, described commutation and the interior chute supplying slip ring pin to move rear embedding of reducing control structure are respectively the groove of three different lengths, when there is axially-movable when between upper center-pole and outer tube unit, sequentially slip in adjacent groove along the oblique line path between groove after slip ring pin moves up; Upper center-pole has arc transition undergauge step, to realize and the coordinating of limited block, when the lower arcuate surface of limited block and the surface of described arc transition undergauge step touch, the upper end disengaging of limited block and touching, to the restriction cancellation of scraper rotational angle of scraper tail end; The front center position of described lower center-pole has the inner chamber for placing locking center-pole, has the through hole embedded for latch segment on the top of described inner chamber, and the latch segment that two sides are taper seat is fixed in this through hole; The front end of described locking center-pole is a taper seat connecting elongated push rod, and wherein, the outer wall conical surface of latch segment matches with the inner conical surface of inner cone sleeve pipe, and the conical surface of inboard wall of latch segment matches with the male cone (strobilus masculinus) on locking center-pole; Check lock lever spring is fixed with between the bottom and the intracavity bottom of lower center-pole of locking center-pole; There is a step in the stage casing of described lower center-pole, between this step and the bottom of inner cone sleeve pipe, be fixed with lower spring around described lower center-pole; Described device also comprises packing element, and the lower end had in described packing element for lower center-pole completes the cavity moved vertically, and wherein, the stage casing of described cavity is a circular arc cavity; Described central rod unit is arranged in outer tube unit, between the top and fishing head of 1 extra sleeve pipe, be provided with upper spring; Packing element is arranged on the lower end of 4 extra sleeve pipes, and the opening that the lower end of described lower center-pole passes 4 extra sleeve bottoms is positioned at packing element; Summit under the lower end of packing element connects.
The present invention has following beneficial effect: this kind of device is made up of several major parts such as scraper, commutation and reducing controlling organization, retaining mechanism, packing elements, in wax removal process, by changing the annular space area of passage that paraffin removal unit is formed in oil pipe, control the hydraulic power size that paraffin removal unit bears, realize rise and fall; By the relative position of center-pole and limited block, control the wax removal external diameter after the opening of scraper, realize gradation wax removal step by step.This device is without the need to additionaling power, and after paraffin removal unit is thrown in and gone into the well, by controlling submersible electric pump start and stop, can realize the overall process of wax removal operation, simplify the operation of field operation, simple to operation, labour intensity is low.In addition, the wax removal external diameter flexibility and changeability of this kind of paraffin removal unit, compliance is stronger.Scraper adopts quadric chain design, and stressed withdrawal when going into the well, goes into the well easier; By the change of center-pole and outer tube relative position, can control scraper open after wax removal external diameter, adjust for different wax deposition thickness, different wax removal operating modes can be adapted to.Change the type of drive of paraffin cleaner, the design for rodless pump system mechanics paraffin removal unit provides a new thinking, promotes the progress of oil-gas field development technology.
Accompanying drawing illustrates:
Fig. 1 is frame for movement sectional view of the present invention.
Fig. 2 is surface structure schematic diagram of the present invention.
Fig. 3 is the structural representation of commutation on upper center-pole of the present invention and reducing control structure.
Fig. 4 is the chute deployed configuration schematic diagram on upper center-pole of the present invention.
Fig. 5 is the structure sectional view of lower coating blade unit of the present invention under limited block is in spacing state.
Fig. 6 is the three-dimensional structure schematic diagram of Fig. 5.
Fig. 7 is the structure sectional view of lower coating blade unit of the present invention under limited block is in not spacing state.
Fig. 8 is the three-dimensional structure schematic diagram of Fig. 7.
Fig. 9 is the sectional view of the internal construction after showing the parts connection such as lower center-pole of the present invention, inner cone sleeve pipe, locking center-pole, latch segment and packing element.
Figure 10 is the structural representation of packing element of the present invention.
1-fishing head in figure; 2-upper spring; The upper center-pole of 3-; 4-1 extra sleeve pipe; 5-slip ring; 6-slip ring pin; 7-2 extra sleeve pipe; 8-righting spring slide ring; 9-screw; 10-righting spring leaf; 11-righting spring retainer ring; 12-3 extra sleeve pipe; 13-scraper; 14-bearing pin; 15-scraper contiguous block; 16-limited block; 17-reclaims spring; 18-inner cone sleeve pipe; Center-pole under 19-; 20-latch segment; 21-locks center-pole; 22-4 extra sleeve pipe; 23-lower spring; 24-packing element; Summit under 25-; 26-check lock lever spring.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, this kind of rodless pump oil extraction system fluid power paraffin removal unit, is divided into inside and outside double-layer structure, and skin is outer tube unit, doctor unit and righting unit, bar unit centered by internal layer.
Wherein, described outer tube unit is made up of after connecting 1 extra sleeve pipe 4,2 extra sleeve pipe 7,3 extra sleeve pipe 12, inner cone sleeve pipe 18 and 4 extra sleeve pipe 22, between 1 extra sleeve pipe 4 and 2 extra sleeve pipe 7, be fixed with slip ring 5.As shown in Figure 3, after fixing, described slip ring 5 can outer tube unit rotational relatively for the structure chart of described slip ring, but its axially and outer tube unit without relative motion; Described slip ring 5 has pin hole, is built-in with slip ring pin 6.
Described doctor unit as shown in Figure 1, Figure 2, shown in Fig. 5, Fig. 6, Fig. 7 and Fig. 8, be made up of scraper 13, scraper contiguous block 15 and bearing pin 14.Wherein, scraper contiguous block 15 is two pieces, the two ends of scraper contiguous block 15 are connected on scraper 13 He on 3 extra sleeve pipes 12 by corresponding bearing pin 14 and form four-bar linkage structure, such structure makes scraper to open under gravity, regains fastening again when meeting obstructions on outer tube.3 extra sleeve pipes 12 are positioned at the end section of scraper 13, have embed for the limited block 16 with lower arcuate surface and run through the passage of outer tube, the outer wall of limited block 16 has the groove for reclaiming spring 17 embedding, described limited block 16 is fixed on 3 extra sleeve pipes 12 by reclaiming spring 17, the external force being subject to coming from center-pole when the lower arcuate surface of limited block 16 promote and radially move leave 3 extra sleeve pipes 12 inner chamber after, then the upper end of limited block 16 will touch with the tail end of scraper 13, thus realizes the restriction to scraper 13 rotational angle.Under such structure design, relative position between upper center-pole and outer tube changes, can just to control the radial position of limited block, thus restriction scraper open after paraffin cutting external diameter, realize the different wax removal diameter of paraffin removal unit, limited block relies on the elastic force reclaiming spring 17 inwardly to regain.
Described righting unit is made up of righting spring slide ring 8, screw 9, righting spring leaf 10 and righting spring retainer ring 11, and described righting unit is fixed on 3 extra sleeve pipes 12.
Described central rod unit is made up of upper center-pole 3 and lower center-pole 19, and both are relatively independent parts in tube unit outside, keep interval therebetween, do not touch when this device is not in running order.Wherein, the top of upper center-pole 3 is fishing head 1, and the part under fishing head 1 is commutation and reducing control structure.As shown in Fig. 2 composition graphs 3, described commutation and the interior chute supplying slip ring pin 6 to move rear embedding of reducing control structure are respectively the groove of three different lengths, namely a in figure, b, c groove, when there is axially-movable when between upper center-pole 3 and outer tube unit, slip ring pin 6 will move up under the promotion of outer tube, sequentially will slip in adjacent groove along the oblique line path between groove afterwards, thus the upper relative position change between center-pole and outer tube of adjustment, the final radial position realizing control limited block 16, thus restriction scraper open after paraffin cutting external diameter, realize the different wax removal diameters of paraffin removal unit.Because slip ring is arranged between 1 extra sleeve pipe and 2 extra sleeve pipes, can rotate relative to outer tube, axis and outer tube are without relative motion, therefore, when there is axially-movable when between center-pole and outer tube, slip ring pin will slip in different grooves, under the effect of upper spring, after slipping into, slip ring pin can be close to bottom chute.
Upper center-pole 3 has arc transition undergauge step, to realize and the coordinating of limited block 16, when the lower arcuate surface of limited block 16 and the surface of described arc transition undergauge step touch, the upper end disengaging of limited block 16 and touching, to the restriction cancellation of scraper 13 rotational angle of scraper 13 tail end.In this programme, the factor causing the lower arcuate surface of limited block and the surface of arc transition undergauge step to touch or be separated is exactly the axial relative motion between upper center-pole and outer tube.
As shown in Figure 9, the front center position of described lower center-pole 19 has the inner chamber for placing locking center-pole 21, has the through hole embedded for latch segment 20 on the top of described inner chamber, and the latch segment 20 that two sides are taper seat is fixed in this through hole; The front end of described locking center-pole 21 is a taper seat connecting elongated push rod, and wherein, the outer wall conical surface of latch segment 20 matches with the inner conical surface of inner cone sleeve pipe 18, and the conical surface of inboard wall of latch segment 20 matches with the male cone (strobilus masculinus) on locking center-pole 21; Check lock lever spring 26 is fixed with between the bottom and the intracavity bottom of lower center-pole 19 of locking center-pole 21; There is a step in the stage casing of described lower center-pole 19, between this step and the bottom of inner cone sleeve pipe 18, be fixed with lower spring 23 around described lower center-pole 19.In addition, described device also comprises packing element 24, and the lower end had in described packing element for lower center-pole 19 completes the cavity moved vertically, and wherein, the stage casing of described cavity is a circular arc cavity.
In fact, said structure constitutes one for locking the retaining mechanism of packing element distortion.During packing element distortion, lower center-pole 19 relatively outer tube moves upward, enter after in inner cone sleeve pipe in the end of lower center-pole, under the thrust of locking spring 26, locking center-pole 21 is protruding, and the male cone (strobilus masculinus) extruding on it promotes latch segment 20 and radially moves, and the male cone (strobilus masculinus) of latch segment extrudes with the inner conical surface of inner cone sleeve pipe and contacts, under the effect of frictional force, form self-locking, thus realize the locking to packing element distortion.This be locked in center-pole be up to reach top dead centre and return time just can change, namely after the tail end of upper center-pole 3 moves downward shake-up locking center-pole, locking center-pole retraction, no longer compress latch segment, at lower spring 23 with under the effect of packing element natural resiliency, lower center tube is left inner cone sleeve pipe by pulling, thus packing element is resiled.
During concrete enforcement, described central rod unit is arranged in outer tube unit, between the top and fishing head 1 of 1 extra sleeve pipe 4, be provided with upper spring 2; Packing element 24 is arranged on the lower end of 4 extra sleeve pipes 22, and the opening that the lower end of described lower center-pole 19 passes bottom 4 extra sleeve pipes 22 is positioned at packing element 24; Summit 25 under the lower end of packing element 24 connects.
The specific works process of this device is as follows: in wax removal operation, this device drops in rodless pump producing well by the delivery device be arranged on production wellhead, this device relies on from focusing in oil pipe to fall with certain speed, scraper is quadric chain, in dropping process, is hampered and can regains, after regaining completely, this device for 2 and the maximum outside diameter of 7/8 inch of oil pipe be 45mm, which ensure that, when larger wax deposition thickness, this device still can fall smoothly.This plant running, by after wax deposition section, under the effect of inertia, impacts lower dead center, the distortion of commutation packing element forced compression, reduces annular space area of passage or makes it shut, and lower center-pole simultaneously relative outer tube moves upward, latch segment is radially extruded, and realizes locking function, and packing element can not be bounced back.Now, open submersible electric pump, under the effect of hydraulic power, this device moves upward along oil pipe, and scraper is opened under deadweight, center-pole and limited block combine restriction under, scraper wax removal external diameter is limited in 52mm, and paraffin cleaner is up carries out first time wax removal.When paraffin cleaner moves to top dead centre, fishing head is together with upper center post impacts top dead centre, packing element continues upwards to run under hydraulic power drives, until on lower center-pole and locking center post impacts wherein center-pole bottom after, latch segment is pushed back, lower center-pole also departs from inner cone sleeve pipe, and packing element retraction under the effect of lower spring and natural resiliency restores.In the process, the slip ring pin on outer tube, along the runner movement on center-pole, makes the relative position between center-pole and outer tube change, so control limited block motion, adjustment scraper open after wax removal external diameter.After closing electric pump, this device falls, then repeats said process, can carry out the wax removal process of other paraffin cutting radiuses respectively, after wax removal process terminates, be reclaimed by this device by the fishing device at laying tube top.
On aforementioned schemes basis, provide further prioritization scheme, namely as shown in Figure 1 and Figure 2, described paraffin removal unit has upper and lower two groups of doctor units, totally 8, distribution form is shown in Fig. 1, described upper center-pole 3 has the two place arc transition undergauge steps corresponding with described upper and lower two groups of doctor units, the setting of described two place's arc transition undergauge steps need meet the following conditions, that is: for upper blade unit, in the spacing situation of limited block, scraper wax removal diameter is 52 millimeters, in the not spacing situation of limited block, scraper wax removal diameter is 56 millimeters; For lower coating blade unit, in spacing situation, scraper wax removal diameter is 52 millimeters, and in not spacing situation, scraper wax removal diameter is 60 millimeters.
Here, the spacing situation of described limited block refers to that other positions on the lower arcuate surface of limited block 16 and upper center-pole 3 touch and do not touch with the surface of described arc transition undergauge step, and the upper end of limited block 16 and the tail end of scraper 13 touch to realize the restriction to scraper 13 rotational angle; This not spacing situation of described limited block refers to when the lower arcuate surface of limited block 16 and the surface of described arc transition undergauge step touch, the upper end disengaging of limited block 16 and touching, to the restriction cancellation of scraper 13 rotational angle of scraper 13 tail end.
In addition, as shown in Figure 10, the inner circle radius of described packing element 24 arc cavity is R1 to the optimizing design scheme provided for packing element, and exradius is R2, and inner circle chamfer radius is R3, then, when above-mentioned parameter is chosen according to following value range, result of implementation is better.I.e. R1 value 102.5 millimeters, the scope of R2 is between 20 millimeters ~ 25 millimeters, and the scope of R3 is between 10 millimeters ~ 20 millimeters.
Claims (3)
1. a rodless pump oil extraction system fluid power paraffin removal unit, is divided into inside and outside double-layer structure, and skin is outer tube unit, doctor unit and righting unit, bar unit centered by internal layer;
Wherein, described outer tube unit is formed after 1 extra sleeve pipe (4), 2 extra sleeve pipes (7), 3 extra sleeve pipes (12), inner cone sleeve pipe (18) and 4 extra sleeve pipes (22) connect, slip ring (5) is fixed with between 1 extra sleeve pipe (4) and 2 extra sleeve pipes (7), after fixing, described slip ring (5) can outer tube unit rotational relatively, but its axially with outer tube unit without relative motion; (5) have pin hole to described slip ring, are built-in with slip ring pin (6);
Described doctor unit is made up of scraper (13), scraper contiguous block (15) and bearing pin (14); Wherein, scraper contiguous block (15) is two pieces, and the two ends of scraper contiguous block (15) are connected to scraper (13) by corresponding bearing pin (14) and above and on 3 extra sleeve pipes (12) form four-bar linkage structure; 3 extra sleeve pipes (12) are positioned at the end section of scraper (13), have embed for the limited block (16) with lower arcuate surface and run through the passage of outer tube, the outer wall of limited block (16) has the groove embedded for recovery spring (17), described limited block (16) is fixed on 3 extra sleeve pipes (12) by reclaiming spring (17), after the lower arcuate surface of limited block (16) leaves the inner chamber of 3 extra sleeve pipes (12), the upper end of limited block (16) and the tail end of scraper (13) touch to realize the restriction to scraper (13) rotational angle;
Described righting unit is made up of righting spring slide ring (8), screw (9), righting spring leaf (10) and righting spring retainer ring (11), and described righting unit is fixed on 3 extra sleeve pipes (12);
Described central rod unit is made up of upper center-pole (3) and lower center-pole (19);
The top of upper center-pole (3) is fishing head (1), part under fishing head (1) is commutation and reducing control structure, move for slip ring pin (6) groove that the rear chute embedded is respectively three different lengths in described commutation and reducing control structure, when there is axially-movable when between upper center-pole (3) and outer tube unit, sequentially slip in adjacent groove along the oblique line path between groove after slip ring pin (6) moves up; Upper center-pole (3) has arc transition undergauge step, to realize and the coordinating of limited block (16), when the lower arcuate surface of limited block (16) and the surface of described arc transition undergauge step touch, the upper end disengaging of limited block (16) and touching, to the restriction cancellation of scraper (13) rotational angle of scraper (13) tail end;
The front center position of described lower center-pole (19) has the inner chamber for placing locking center-pole (21), have for latch segment (20) through hole that embeds on the top of described inner chamber, the latch segment (20) that two sides are taper seat is fixed in this through hole; The front end of described locking center-pole (21) is a taper seat connecting elongated push rod, wherein, the outer wall conical surface of latch segment (20) matches with the inner conical surface of inner cone sleeve pipe (18), and the conical surface of inboard wall of latch segment (20) matches with the male cone (strobilus masculinus) in locking center-pole (21); Check lock lever spring (26) is fixed with between the bottom and the intracavity bottom of lower center-pole (19) of locking center-pole (21); There is a step in the stage casing of described lower center-pole (19), between this step and the bottom of inner cone sleeve pipe (18), be fixed with lower spring (23) around described lower center-pole (19);
Described device also comprises packing element (24), and the lower end had in described packing element for lower center-pole (19) completes the cavity moved vertically, and wherein, the stage casing of described cavity is a circular arc cavity;
Described central rod unit is arranged in outer tube unit, between the top and fishing head (1) of 1 extra sleeve pipe (4), be provided with upper spring (2); Packing element (24) is arranged on the lower end of 4 extra sleeve pipes (22), and the opening that the lower end of described lower center-pole (19) passes bottom 4 extra sleeve pipes (22) is positioned at packing element (24);
Summit (25) under the lower end of packing element (24) connects.
2. rodless pump oil extraction system fluid power paraffin removal unit according to claim 1, it is characterized in that: described paraffin removal unit has upper and lower two groups of doctor units, described upper center-pole (3) has the two place arc transition undergauge steps corresponding with described upper and lower two groups of doctor units, the setting of described two place's arc transition undergauge steps need meet the following conditions, that is: for upper blade unit, in the spacing situation of limited block, scraper wax removal diameter is 52 millimeters, in the not spacing situation of limited block, scraper wax removal diameter is 56 millimeters; For lower coating blade unit, in spacing situation, scraper wax removal diameter is 52 millimeters, and in not spacing situation, scraper wax removal diameter is 60 millimeters;
This spacing situation of described limited block refers to that other positions on the lower arcuate surface of limited block (16) and upper center-pole (3) touch and do not touch with the surface of described arc transition undergauge step, and the upper end of limited block (16) and the tail end of scraper (13) touch to realize the restriction to scraper (13) rotational angle; This not spacing situation of described limited block refers to when the lower arcuate surface of limited block (16) and the surface of described arc transition undergauge step touch, the upper end disengaging of limited block (16) and touching, to the restriction cancellation of scraper (13) rotational angle of scraper (13) tail end.
3. rodless pump oil extraction system fluid power paraffin removal unit according to claim 2, it is characterized in that: the inner circle radius of described packing element (24) arc cavity is R1, exradius is R2, inner circle chamfer radius is R3, then described arc cavity inner circle radius, exradius and inner circle chamfer radius are chosen according to following value range respectively, R1 value 102.5 millimeters, the scope of R2 is between 20 millimeters ~ 25 millimeters, and the scope of R3 is between 10 millimeters ~ 20 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310277537.8A CN103306640B (en) | 2013-07-04 | 2013-07-04 | Rodless pump oil extraction system fluid power paraffin removal unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310277537.8A CN103306640B (en) | 2013-07-04 | 2013-07-04 | Rodless pump oil extraction system fluid power paraffin removal unit |
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| CN103306640A CN103306640A (en) | 2013-09-18 |
| CN103306640B true CN103306640B (en) | 2015-07-29 |
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| CN101701514A (en) * | 2009-07-23 | 2010-05-05 | 西安宇星石油机械新技术开发有限公司 | Wax scraper for inner wall of oil pipe |
| CN201610741U (en) * | 2009-08-14 | 2010-10-20 | 中国石油天然气集团公司 | Paraffin removal device in pit shaft for sucker rod |
| CN201826811U (en) * | 2010-10-12 | 2011-05-11 | 谢照宽 | Drifting scraping device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0513645D0 (en) * | 2005-07-02 | 2005-08-10 | Specialised Petroleum Serv Ltd | Wellbore cleaning method and apparatus |
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2013
- 2013-07-04 CN CN201310277537.8A patent/CN103306640B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2223390C2 (en) * | 2002-03-26 | 2004-02-10 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Gear to clean internal surface of pipes |
| RU2336410C2 (en) * | 2006-07-21 | 2008-10-20 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Hydromechanical and multi-purpose scraper |
| CN201254961Y (en) * | 2008-09-23 | 2009-06-10 | 陕西伟丰石油钻采装备有限公司 | Anti-releasing rotating wax scraping centralizer for sucker rod roller |
| CN201428431Y (en) * | 2009-06-15 | 2010-03-24 | 中国石油集团西部钻探工程有限公司克拉玛依钻井工艺研究院 | Tube inside wall scraping device |
| CN101701514A (en) * | 2009-07-23 | 2010-05-05 | 西安宇星石油机械新技术开发有限公司 | Wax scraper for inner wall of oil pipe |
| CN201610741U (en) * | 2009-08-14 | 2010-10-20 | 中国石油天然气集团公司 | Paraffin removal device in pit shaft for sucker rod |
| CN201826811U (en) * | 2010-10-12 | 2011-05-11 | 谢照宽 | Drifting scraping device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103306640A (en) | 2013-09-18 |
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