CN103306640A - Fluid power paraffin removal device of rodless pump oil recovery system - Google Patents

Fluid power paraffin removal device of rodless pump oil recovery system Download PDF

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Publication number
CN103306640A
CN103306640A CN2013102775378A CN201310277537A CN103306640A CN 103306640 A CN103306640 A CN 103306640A CN 2013102775378 A CN2013102775378 A CN 2013102775378A CN 201310277537 A CN201310277537 A CN 201310277537A CN 103306640 A CN103306640 A CN 103306640A
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China
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pole
scraper
center
unit
limited block
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CN2013102775378A
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CN103306640B (en
Inventor
王尊策
张井龙
吕凤霞
李森
徐艳
温后珍
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Northeast Petroleum University
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Northeast Petroleum University
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Abstract

The invention discloses a fluid power paraffin removal device of a rodless pump oil recovery system, and aims to provide an efficient paraffin removal device which is driven by utilizing the fluid power generated by the lifting of liquid flow in a pipe column, so that removing paraffin deposit on the wall of an oil pipe wall of the rodless pump oil recovery system is realized. The device is characterized in that the outer layer comprises an outer sleeve pipe unit, a scraper unit and a rubber barrel; the inner layer is a center rod unit; the scraper unit adopts a four-connecting-rod structure and is provided with a limiting stopper; direction-alternating and diameter-varied control structure for affecting the scraper unit and a mechanism for locking the rubber barrel are arranged on the center rod unit; the rubber barrel is used for changing the annular overflow area formed by the paraffin removal device in the oil pipe and controlling the fluid power born by the paraffin removal device, so that the rising and falling of the paraffin removal device are realized; through the relative position of the centre rod and the limiting stopper, the paraffin removal outer diameter opened by the scraper is controlled, so that gradual paraffin removal performed step by step is realized. The paraffin removal device has the advantages that the additional power is not required; the gradual paraffin removal performed step by step can be realized; the paraffin removal diameter is flexile and controllable; the labor intensity of workers is reduced; the working efficiency of paraffin removal is improved.

Description

Rodless pump oil extraction system fluid power paraffin removal unit
Technical field
The present invention relates to be applied to a kind of downhole tool in the petroleum gas engineering field, can be used for the removing operation of rodless pump oil extraction system tube inner wall wax deposition.
Background technology
The crude oil that China produces is waxy crude oil more than 80%, and wax deposit is the thorny problem that perplexs the waxy crude oil exploitation for a long time, and the wax control and the wax removal cost that bring because of the wax deposit problem are also high.The main constituent of oil is the hydrocarbon of various components, wherein be dissolved with a certain amount of paraffin, in recovery process, along with the reduction of temperature, pressure and separating out of gas, crude oil begins to reduce to the solvability of wax, the paraffin of dissolving is just separated out with crystalline solid, through overbunching, is deposited at last on the solid phase surface such as tube wall.Mechanical paraffin removal is a kind of dewaxing method commonly used, refers to strike off wax on the tubing wall by special paraffin scraper or paraffin bit, and wax is brought to the dewaxing method on ground with crude stream.The mechanical paraffin removal of rodless pump well is to utilize the ground winch, by pulley with the wax removal instrument under lubricator in oil pipe, and up and down at the tubing wax position by winch, wax deposition is struck off, carry out pit shaft by crude stream.Compare with other wax removal mode, mechanical paraffin removal is polluted reservoir not, and convenient management is simple to operate.But because wax removal instrument external diameter is fixed, and be subject to the lubricator height, weighted lever weight is limited, under the wax deposition serious situation, the wax removal instrument is difficult in the lower going-into-well, normal wax removal process is developed into the wax process of attacking on the practical significance, namely need manually handling steel wire repeatedly, under the effect of the downward impact force that paraffin scraper produces, carry out wax removal; In addition, be example with the Daqing oil field, along with the employing of polymer injection displacement of reservoir oil mode, poly-drive electric pump well wax deposition speed and obviously accelerate, to separate out wax and have higher viscoplasticity, period of removing the wax shortens, and the wax removal difficulty increases, and these just cause labor strength obviously to increase.
Summary of the invention
In order to solve the technical problem of mentioning in the background technology, the invention provides a kind of rodless pump oil extraction system fluid power paraffin removal unit, this kind paraffin removal unit need not additionaling power, can realize gradation wax removal step by step, wax removal diameter flexible and controllable, reduce working strength of workers, improved the operating efficiency of wax removal.
Technical scheme of the present invention is: this kind rodless pump oil extraction system fluid power paraffin removal unit, be divided into inside and outside double-layer structure, and skin is for outer tube unit, doctor unit and set upright the unit, bar unit centered by the internal layer;
Wherein, described outer tube unit constitutes after being connected by 1 extra sleeve pipe, 2 extra sleeve pipes, 3 extra sleeve pipes, inner cone sleeve pipe and 4 extra sleeve pipes, between 1 extra sleeve pipe and 2 extra sleeve pipes, slip ring is arranged fixedly, after fixing, described slip ring is the outer tube unit rotational relatively, but its axially and the outer tube unit do not have relative motion; Have pin hole on the described slip ring, be built-in with the slip ring pin;
Described doctor unit is made of scraper, scraper contiguous block and bearing pin; Wherein, the scraper contiguous block is two, and the bearing pin of the two ends of scraper contiguous block by correspondence is connected on the scraper He on the 3 extra sleeve pipes and forms four-bar linkage structure; Be positioned at the end section of scraper at 3 extra sleeve pipes, have sacrificial vessel the limited block of lower arcuate surface passage that embed and that run through outer tube is arranged, the outer wall of limited block has for reclaiming the groove that spring embeds, described limited block is fixed on the 3 extra sleeve pipes by reclaiming spring, leave the inner chamber of 3 extra sleeve pipes when the lower arcuate surface of limited block after, the upper end of limited block touches to realize the restriction to the scraper rotational angle mutually with the tail end of scraper; The described unit of setting upright constitutes by setting upright spring slip ring, screw, set upright spring leaf and setting upright the spring retainer ring, and the described unit of setting upright is fixed on the 3 extra sleeve pipes; Described center-pole unit is made of last center-pole and following center-pole; The top of last center-pole is fishing head, part under fishing head is commutation and reducing control structure, the chute that supplies the slip ring pin to move the back embedding in described commutation and the reducing control structure is respectively the groove of three different lengths, when between last center-pole and outer tube unit axially-movable taking place, after moving up, slips in regular turn in the adjacent groove along the oblique line path between groove the slip ring pin; Have arc transition undergauge step on the last center-pole, to realize and the cooperating of limited block, when the lower arcuate surface of limited block was touched mutually with the surface of described arc transition undergauge step, the upper end disengaging of limited block and touching mutually of scraper tail end were to the restriction cancellation of scraper rotational angle; The front end central part of described down center-pole has for the inner chamber of placing the locking center-pole, has the through hole that embeds 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 that connects 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 male cone (strobilus masculinus) on locking center-pole; Between the intracavity bottom of the bottom of locking center-pole and following center-pole, the check lock lever spring is arranged fixedly; There is a step in the described stage casing of center-pole down, around described center-pole down lower spring is arranged fixedly between the bottom of this step and inner cone sleeve pipe; Described device also comprises packing element, has confession in the described packing element and finishes the cavity of motion vertically in the lower end of center-pole down, and wherein, the stage casing of described cavity is a circular arc cavity; Described center-pole unit is arranged in the outer tube unit, between the top of 1 extra sleeve pipe and fishing head upper spring is installed; Packing element is installed in the lower end of 4 extra sleeve pipes, and the opening that the described lower end of center-pole down 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 device is made up of several main parts such as scraper, commutation and reducing controlling organization, retaining mechanism, packing elements, in the wax removal process, by change the annular space area of passage that paraffin removal unit forms in oil pipe, the power of the surging size that the control paraffin removal unit bears realizes rise and fall; By the relative position of center-pole and limited block, the wax removal external diameter after control the opening of scraper is realized gradation wax removal step by step.This device need not additionaling power, after paraffin removal unit is thrown in and gone into the well, by the start and stop of control submersible electric pump, can realize the overall process of wax removal operation, has simplified the operation of field operation, and simple to operation, labour intensity is low.In addition, the wax removal external diameter flexibility and changeability of this kind paraffin removal unit, compliance is stronger.Scraper adopts the quadric chain design, stressed withdrawal when going into the well, and it is easier to go into the well; By the change of center-pole and outer tube relative position, the wax removal external diameter after can controlling scraper and opening is adjusted at different wax deposition thicknesses, can adapt to different wax removal operating modes.Change the type of drive of paraffin cleaner, for the design of rodless pump system mechanics paraffin removal unit provides a new thinking, promote the oil-gas field development development of technology.
Description of drawings:
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 commutation on the center-pole and the structural representation of reducing control structure gone up of the present invention.
Fig. 4 is the chute deployed configuration schematic diagram of going up on the center-pole of the present invention.
To be lower coating blade of the present invention unit be in structure sectional view under the spacing state at limited block to Fig. 5.
Fig. 6 is the three-dimensional structure schematic diagram of Fig. 5.
To be lower coating blade of the present invention unit be in structure sectional view under the not spacing state at limited block to Fig. 7.
Fig. 8 is the three-dimensional structure schematic diagram of Fig. 7.
Fig. 9 is the sectional view of showing the internal construction after center-pole down of the present invention, inner cone sleeve pipe, parts such as locking center-pole, latch segment and packing element connect.
Figure 10 is the structural representation of packing element of the present invention.
1-fishing head among the figure; The 2-upper spring; The last center-pole of 3-; 4-1 extra sleeve pipe; The 5-slip ring; 6-slip ring pin; 7-2 extra sleeve pipe; 8-sets upright the spring slip ring; The 9-screw; 10-sets upright spring leaf; 11-sets upright the spring retainer ring; 12-3 extra sleeve pipe; The 13-scraper; The 14-bearing pin; 15-scraper contiguous block; The 16-limited block; 17-reclaims spring; 18-inner cone sleeve pipe; Center-pole under the 19-; The 20-latch segment; 21-locks center-pole; 22-4 extra sleeve pipe; The 23-lower spring; The 24-packing element; Summit under the 25-; 26-check lock lever spring.
The specific embodiment:
The invention will be further described below in conjunction with accompanying drawing:
By shown in Figure 1, this kind rodless pump oil extraction system fluid power paraffin removal unit is divided into inside and outside double-layer structure, and skin is for outer tube unit, doctor unit and set upright the unit, bar unit centered by the internal layer.
Wherein, described outer tube unit constitutes after being connected by 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, between 1 extra sleeve pipe 4 and 2 extra sleeve pipes 7 slip ring 5 is arranged fixedly.The structure chart of described slip ring as shown in Figure 3, fixing after, described slip ring 5 is the outer tube unit rotational relatively, but its axial and outer tube unit does not have relative motion; Have pin hole on the described slip ring 5, be built-in with slip ring pin 6.
Described doctor unit such as Fig. 1, Fig. 2, Fig. 5, Fig. 6, Fig. 7 and shown in Figure 8 are made of scraper 13, scraper contiguous block 15 and bearing pin 14.Wherein, scraper contiguous block 15 is two, the bearing pin 14 of the two ends of scraper contiguous block 15 by correspondence is connected on the scraper 13 He on the 3 extra sleeve pipes 12 and forms four-bar linkage structure, such structure makes scraper to open under the gravity effect, regains fastening under the situation about meeting obstructions again on outer tube.Be positioned at the end section of scraper 13 at 3 extra sleeve pipes 12, have sacrificial vessel limited block 16 passages that embed and that run through outer tube of lower arcuate surface are arranged, the outer wall of limited block 16 has for reclaiming the groove that spring 17 embeds, described limited block 16 is fixed on the 3 extra sleeve pipes 12 by reclaiming spring 17, the external force that is subjected to coming from center-pole when the lower arcuate surface of limited block 16 promotes and after radially the inner chamber of 3 extra sleeve pipes 12 is left in motion, then the upper end of limited block 16 will be touched mutually with the tail end of scraper 13, thereby realizes the restriction to scraper 13 rotational angles.Under such structure design, relative position between last center-pole and outer tube changes, can be just with the radial position of control limited block, thereby limit paraffin cutting external diameter after scraper opens, realize the different wax removal diameters of paraffin removal unit, limited block relies on the elastic force that reclaims spring 17 inwardly to regain.
The described unit of setting upright constitutes by setting upright spring slip ring 8, screw 9, set upright spring leaf 10 and setting upright spring retainer ring 11, and the described unit of setting upright is fixed on the 3 extra sleeve pipes 12.
Described center-pole unit is made of last center-pole 3 and following center-pole 19, and both are relatively independent parts in the tube unit outside, keep at interval when this device is in running order between the two, and are tactile mutually.Wherein, the top of last center-pole 3 is fishing head 1, and the part under fishing head 1 is commutation and reducing control structure.As Fig. 2 in conjunction with shown in Figure 3, the chute that supplies slip ring pin 6 to move the back embedding in described commutation and the reducing control structure is respectively the groove of three different lengths, i.e. a among the figure, b, the c groove, in when, between last center-pole 3 and outer tube unit axially-movable taking place when, slip ring pin 6 will move up under the promotion of outer tube, to slip in regular turn in the adjacent groove along the oblique line path between groove afterwards, thereby the relative position in the adjustment between center-pole and outer tube changes, the final radial position that realizes control limited block 16, the paraffin cutting external diameter after thereby the restriction scraper opens, the different wax removal diameters of realization paraffin removal unit.Because slip ring is installed between 1 extra sleeve pipe and the 2 extra sleeve pipes, can rotate relative to outer tube, axial and outer tube does not have relative motion, therefore, when between center-pole and outer tube axially-movable taking place, the slip ring pin will slip in the different grooves, under the effect of upper spring, after slipping into, the slip ring pin can be close to the chute bottom.
Have arc transition undergauge step on the last center-pole 3, to realize and the cooperating of limited block 16, when the lower arcuate surface of limited block 16 was touched mutually with the surface of described arc transition undergauge step, the upper end disengaging of limited block 16 and touching mutually of scraper 13 tail ends were to the restriction cancellation of scraper 13 rotational angles.In this programme, the lower arcuate surface that causes limited block is touched mutually with the surface of arc transition undergauge step or the factor of separating is exactly the axial relative motion of going up between center-pole and the outer tube.
As shown in Figure 9, the front end central part of described down center-pole 19 has for the inner chamber of placing locking center-pole 21, has the through hole that embeds 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 that connects 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 male cone (strobilus masculinus) on locking center-pole 21; Between the intracavity bottom of the bottom of locking center-pole 21 and following center-pole 19, check lock lever spring 26 is arranged fixedly; There is a step in the described stage casing of center-pole 19 down, around described center-pole 19 down lower spring 23 is arranged fixedly between the bottom of this step and inner cone sleeve pipe 18.In addition, described device also comprises packing element 24, has confession in the described packing element and finishes the cavity of motion vertically in the lower end of center-pole 19 down, and wherein, the stage casing of described cavity is a circular arc cavity.
In fact, said structure has constituted a retaining mechanism that is used for the distortion of locking packing element.During the packing element distortion, following center-pole 19 relative outer tubes move upward, after the end of center-pole enters in the inner cone sleeve pipe down, under the thrust of locking spring 26, locking center-pole 21 is protruding, and the male cone (strobilus masculinus) extruding on it promotes radially outwards motion of latch segment 20, and the male cone (strobilus masculinus) of latch segment contacts with the inner conical surface extruding of inner cone sleeve pipe, under the effect of frictional force, form self-locking, thereby realize the locking to the packing element distortion.Thisly be locked in the up arrival top dead centre of center-pole and just can change during return, namely after the tail end of last center-pole 3 moves downward shake-up locking center-pole, locking center-pole retraction, no longer compress latch segment, under lower spring 23 and the flexible effect of packing element self, lower center tube is pulled and is left the inner cone sleeve pipe, thereby packing element is resiled.
During concrete enforcement, described center-pole unit is arranged in the outer tube unit, between the top of 1 extra sleeve pipe 4 and fishing head 1 upper spring 2 is installed; Packing element 24 is installed in the lower end of 4 extra sleeve pipes 22, and the opening that the described lower end of center-pole 19 down passes 4 extra sleeve pipes, 22 bottoms is positioned at packing element 24; Summit 25 under the lower end of packing element 24 connects.
The concrete course of work of this device is as follows: in the wax removal operation, this device is dropped in the rodless pump producing well by the delivery device that is installed on the production wellhead, this device relies on from focusing in the oil pipe to fall with certain speed, scraper is quadric chain, in dropping process, is hampered and can regains, after regaining fully, this device is 45mm at the maximum outside diameter of 2 and 7/8 inches oil pipes, and this has guaranteed that this device still can fall smoothly when big wax deposition thickness.The operation of this device under action of inertia, is impacted lower dead center by after the wax deposition section, the stressed compressive strain of commutation packing element reduces the annular space area of passage or it is shut, and the simultaneously relative outer tube of following center-pole moves upward, latch segment radially is extruded, and realizes locking function, and packing element can not be bounced back.At this moment, open submersible electric pump, under the effect of the power of surging, this device moves upward along oil pipe, and scraper is opened under deadweight, and in uniting under the restriction of center-pole and limited block, scraper wax removal external diameter is limited in 52mm, the up wax removal first time that carries out of paraffin cleaner.When paraffin cleaner moves to top dead centre, fishing head is together with last center-pole bump top dead centre, packing element continues upwards operation under the power of surging drives, after center-pole and locking center-pole wherein bump is gone up the bottom of center-pole down, latch segment is pushed back, following center-pole also breaks away from the inner cone sleeve pipe, the packing element recovery that bounces back under lower spring and self flexible effect.In this process, the runner movement of the slip ring pin on the outer tube on the center-pole changes the relative position between center-pole and outer tube, and then the motion of control limited block, adjusts the wax removal external diameter after scraper is opened.After closing electric pump, this device falls, and repeats said process again, can carry out the wax removal process of other paraffin cutting radiuses respectively, after the wax removal process finishes, by the fishing device at laying tube top this device is reclaimed.
On the 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 seen Fig. 1, described going up on the 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 the upper blade unit, under the spacing situation of limited block, scraper wax removal diameter is 52 millimeters, under the not spacing situation of limited block, scraper wax removal diameter is 56 millimeters; For the lower coating blade unit, under the spacing situation, scraper wax removal diameter is 52 millimeters, and under the 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 the last center-pole 3 touch mutually and touch mutually with the surface of described arc transition undergauge step, and the tail end of the upper end of limited block 16 and scraper 13 touches mutually with the restriction of realization to scraper 13 rotational angles; This not spacing situation of described limited block refers to that the upper end disengaging of limited block 16 and touching mutually of scraper 13 tail ends are to the restriction cancellation of scraper 13 rotational angles when the lower arcuate surface of limited block 16 is touched mutually with the surface of described arc transition undergauge step.
In addition, the optimizing design scheme that provides for packing element as shown in figure 10, the interior radius of circle of described packing element 24 arc cavitys is R1, exradius is R2, interior rounded corner radius is R3, when then above-mentioned parameter was chosen according to following value range, result of implementation was better.Be 102.5 millimeters of R1 values, 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 for outer tube unit, doctor unit and set upright the unit, bar unit centered by the internal layer;
Wherein, described outer tube unit connects the back by 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) and constitutes, between 1 extra sleeve pipe (4) and 2 extra sleeve pipes (7), slip ring (5) is arranged fixedly, after fixing, described slip ring (5) is the outer tube unit rotational relatively, but its axially and the outer tube unit do not have relative motion; Described slip ring has pin hole on (5), is built-in with slip ring pin (6);
Described doctor unit is made of scraper (13), scraper contiguous block (15) and bearing pin (14); Wherein, scraper contiguous block (15) is two, and the two ends of scraper contiguous block (15) are connected to scraper (13) upward by corresponding bearing pin (14) and 3 extra sleeve pipes (12) are gone up the formation four-bar linkage structure; Be positioned at the end section of scraper (13) at 3 extra sleeve pipes (12), have sacrificial vessel the limited block (16) of lower arcuate surface passage that embed and that run through outer tube is arranged, the outer wall of limited block (16) has for reclaiming the groove that spring (17) embeds, described limited block (16) is fixed on the 3 extra sleeve pipes (12) by reclaiming spring (17), leave the inner chamber of 3 extra sleeve pipes (12) when the lower arcuate surface of limited block (16) after, the upper end of limited block (16) is tactile to realize the restriction to scraper (13) rotational angle mutually with the tail end of scraper (13);
The described unit of setting upright constitutes by setting upright spring slip ring (8), screw (9), set upright spring leaf (10) and setting upright spring retainer ring (11), and the described unit of setting upright is fixed on the 3 extra sleeve pipes (12);
Described center-pole unit is made of last center-pole (3) and following center-pole (19);
The top of last center-pole (3) is fishing head (1), part under fishing head (1) is commutation and reducing control structure, the chute that embeds for the mobile back of slip ring pin (6) in described commutation and the reducing control structure is respectively the groove of three different lengths, when between last center-pole (3) and outer tube unit axially-movable taking place, after moving up, slips in regular turn in the adjacent groove along the oblique line path between groove slip ring pin (6); Have arc transition undergauge step on the last center-pole (3), to realize and the cooperating of limited block (16), when the lower arcuate surface of limited block (16) is touched mutually with the surface of described arc transition undergauge step, the upper end disengaging of limited block (16) and touching mutually of scraper (13) tail end are to the restriction cancellation of scraper (13) rotational angle;
The described front end central part of center-pole (19) down has for the inner chamber of placing locking center-pole (21), have the through hole that embeds for latch segment (20) 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 that connects 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 male cone (strobilus masculinus) in locking center-pole (21); Between the intracavity bottom of the bottom of locking center-pole (21) and following center-pole (19), check lock lever spring (26) is arranged fixedly; There is a step in the described stage casing of center-pole (19) down, around described center-pole (19) down lower spring (23) is arranged fixedly between the bottom of this step and inner cone sleeve pipe (18);
Described device also comprises packing element (24), has confession in the described packing element and finishes the cavity of motion vertically in the lower end of center-pole (19) down, and wherein, the stage casing of described cavity is a circular arc cavity;
Described center-pole unit is arranged in the outer tube unit, between the top of 1 extra sleeve pipe (4) and fishing head (1) upper spring (2) is installed; Packing element (24) is installed in the lower end of 4 extra sleeve pipes (22), and the opening that the described lower end of center-pole (19) down passes 4 extra sleeve pipes (22) bottom 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 going up on the 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 the upper blade unit, under the spacing situation of limited block, scraper wax removal diameter is 52 millimeters, under the not spacing situation of limited block, scraper wax removal diameter is 56 millimeters; For the lower coating blade unit, under the spacing situation, scraper wax removal diameter is 52 millimeters, and under the not spacing situation, scraper wax removal diameter is 60 millimeters;
This spacing situation of described limited block refers to the lower arcuate surface of limited block (16) and touch mutually other positions on the last center-pole (3) and touch mutually with the surface of described arc transition undergauge step, and the tail end of the upper end of limited block (16) and scraper (13) touches mutually with the restriction of realization to scraper (13) rotational angle; This not spacing situation of described limited block refers to when the lower arcuate surface of limited block (16) is touched mutually with the surface of described arc transition undergauge step, the upper end disengaging of limited block (16) and touching mutually of scraper (13) tail end are to the restriction cancellation of scraper (13) rotational angle.
3. rodless pump oil extraction system fluid power paraffin removal unit according to claim 2, it is characterized in that: the interior radius of circle of described packing element (24) arc cavity is R1, exradius is R2, interior rounded corner radius is R3, then above-mentioned parameter is chosen according to following value range, 102.5 millimeters of R1 values, the scope of R2 are between 20 millimeters~25 millimeters, and the scope of R3 is between 10 millimeters~20 millimeters.
CN201310277537.8A 2013-07-04 2013-07-04 Rodless pump oil extraction system fluid power paraffin removal unit Expired - Fee Related CN103306640B (en)

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CN113047812A (en) * 2021-04-21 2021-06-29 濮阳市元亨利通石油机械有限公司 Spring type casing scraper
CN116927722A (en) * 2023-08-05 2023-10-24 东北石油大学 Oil pipe paraffin removal and descaling method and assembly and device for implementing same

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CN104100231B (en) * 2014-07-22 2016-08-17 西南石油大学 Pit shaft automatic descaling apparatus and descaling method thereof
CN104100231A (en) * 2014-07-22 2014-10-15 西南石油大学 Automatic descaling device and method for shafts
CN104563966A (en) * 2014-10-31 2015-04-29 中国石油天然气股份有限公司 Automatic paraffin cleaner of electric oil-submersible centrifugal pump
CN104563966B (en) * 2014-10-31 2017-02-01 中国石油天然气股份有限公司 Automatic paraffin cleaner of electric oil-submersible centrifugal pump
CN104653154A (en) * 2015-02-25 2015-05-27 中国石油天然气股份有限公司 Drifting and scraping integrated tool
CN104653154B (en) * 2015-02-25 2017-06-13 中国石油天然气股份有限公司 Drifting and scraping integrated tool
CN106639983B (en) * 2016-11-30 2018-12-14 中国海洋石油集团有限公司 A kind of reducing casing pipeline scraper
CN106639983A (en) * 2016-11-30 2017-05-10 中国海洋石油总公司 Variable-diameter tube scraper of casing pipe
CN107558953A (en) * 2017-10-27 2018-01-09 东北石油大学 Integral type pitching is segmented wall scraper
CN107558953B (en) * 2017-10-27 2019-10-29 东北石油大学 Integral type pitching is segmented wall scraper
CN108412444A (en) * 2018-04-26 2018-08-17 东北石油大学 Rodless pump fluid power paraffin cleaner well head launches retracting device
CN108412444B (en) * 2018-04-26 2023-05-12 东北石油大学 Wellhead throwing and recycling device of hydraulic paraffin cleaner of rodless pump
CN108643863A (en) * 2018-07-17 2018-10-12 杨志刚 A kind of sucker rod self-adapting type pit shaft paraffin removal unit
CN108643863B (en) * 2018-07-17 2020-11-17 嘉兴市国龙石油化工股份有限公司 Sucker rod self-adaptation formula pit shaft paraffin removal device
CN109577918A (en) * 2019-01-03 2019-04-05 中国石油集团长城钻探工程有限公司 Paraffin removal from oil well apparatus for eliminating sludge
CN109779572A (en) * 2019-03-08 2019-05-21 长江大学 A kind of reducing surges mechanical paraffin removal unit
CN109779572B (en) * 2019-03-08 2023-08-22 长江大学 Variable-diameter hydraulic mechanical paraffin removal device
CN110206523A (en) * 2019-05-31 2019-09-06 西安交通大学 Depth slot reversing mechanism, cumulative stick pusher and surge generator
CN110206523B (en) * 2019-05-31 2023-12-05 西安交通大学 Deep and shallow groove reversing mechanism, energy collecting rod pusher and shock wave generator
CN110242233A (en) * 2019-07-24 2019-09-17 西南石油大学 A kind of variable outer diameter cutting bed cleanout tool of fluid pressure type
CN110242233B (en) * 2019-07-24 2024-04-09 西南石油大学 Hydraulic type variable outer diameter rock debris bed cleaning tool
CN112983355B (en) * 2019-12-18 2022-06-03 中国石油天然气股份有限公司 Reducing paraffin scraper
CN112983355A (en) * 2019-12-18 2021-06-18 中国石油天然气股份有限公司 Reducing paraffin scraper
CN112593897A (en) * 2021-01-14 2021-04-02 长江大学 Controllable reducing pipe scraper
CN113047812B (en) * 2021-04-21 2022-11-25 濮阳市元亨利通石油机械有限公司 Spring type casing scraper
CN113047812A (en) * 2021-04-21 2021-06-29 濮阳市元亨利通石油机械有限公司 Spring type casing scraper
CN116927722A (en) * 2023-08-05 2023-10-24 东北石油大学 Oil pipe paraffin removal and descaling method and assembly and device for implementing same
CN116927722B (en) * 2023-08-05 2024-05-10 东北石油大学 Oil pipe paraffin removal and descaling method and assembly and device for implementing same

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