CN109798083B - Petal type rotatable damping wellhead packing box and use method thereof - Google Patents
Petal type rotatable damping wellhead packing box and use method thereof Download PDFInfo
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- CN109798083B CN109798083B CN201910145748.3A CN201910145748A CN109798083B CN 109798083 B CN109798083 B CN 109798083B CN 201910145748 A CN201910145748 A CN 201910145748A CN 109798083 B CN109798083 B CN 109798083B
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Abstract
A petal type rotatable damping wellhead packing box comprises a pumping unit polished rod, an upper box body, a lower box body and an oil pipe interface eccentric device, wherein the upper box body, the lower box body and the oil pipe interface eccentric device are sequentially sleeved on the pumping unit polished rod; go up and be provided with hollow rolling disc between the letter body, the lower letter body, inlayed lamella formula buddhist nun in the inside dish chamber of this rolling disc, this lamella formula buddhist nun includes left circular arc body and right circular arc body, and left circular arc body, right circular arc body splice each other in order to form buddhist nun rod hole, run through in this buddhist nun rod hole and cross there is the beam-pumping unit polished rod. The design not only solves the problem of eccentric wear and has lower cost, but also is easy to operate and has stronger stability.
Description
Technical Field
The invention relates to an oil well wellhead packing box, in particular to a petal type rotatable nylon wellhead packing box and a using method thereof, which are particularly suitable for reducing the cost of solving the eccentric wear problem.
Background
The wellhead of the pumping well is provided with a set of packing box which is a sealing device aiming at an oil pipe and a pumping rod, and the packing box mainly has the sealing function on a polish rod and the oil pipe which move up and down.
When the pumping well is installed for the first time, the contact ratio of the center of the horsehead for hanging the polish rod of the pumping well and the axle center of the well head is very high, however, along with the settlement of the load of the pumping unit which is up to 10 tons and the foundation of the pumping unit, the contact ratio deviation of the center of the horsehead and the axle center of the well head is large, the polish rod of the pumping unit can deviate to one direction, and the polish rod and the damping element inside the packing box are subjected to eccentric wear. In case take place the eccentric wear among the prior art, just must change the buddhist nun's component, and because current buddhist nun's component is welded and is died inside the packing box, as long as disintegrate the packing box and carry out, the operation is very loaded down with trivial details, extravagant manpower and practical cost, therefore, often change whole packing box in the current operation, material cost is higher.
The information disclosed in this background section is only for enhancement of understanding of the general background of the patent application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to overcome the defects and problems of the prior art that the eccentric wear problem is high in solution cost, and provides a flap type rotatable damping wellhead packing box and a using method thereof.
In order to achieve the above purpose, the technical solution of the invention is as follows: a petal type rotatable damping wellhead packing box comprises a pumping unit polished rod, an upper box body, a lower box body and an oil pipe interface eccentric device, wherein the upper box body, the lower box body and the oil pipe interface eccentric device are sequentially sleeved on the pumping unit polished rod;
go up and be provided with hollow rolling disc between the letter body, the lower letter body, inlayed lamella formula buddhist nun in the inside dish chamber of this rolling disc, this lamella formula buddhist nun includes left circular arc body and right circular arc body, and left circular arc body, right circular arc body splice each other in order to form buddhist nun rod hole, run through in this buddhist nun rod hole and cross there is the beam-pumping unit polished rod.
The cross sections of the rotating disc and the petal type nylon are circular or similar circular structures.
The outer side wall of the left arc body is connected with the left convex key, the inner side wall of the left arc body is arranged opposite to the inner side wall of the right arc body, and the outer side wall of the right arc body is connected with the right convex key; the rotary disc is characterized in that a left key groove and a right key groove which are communicated with the disc cavity are formed in the disc surface of the rotary disc, a left convex key is embedded into the left key groove, and a right convex key is embedded into the right key groove.
The width more than or equal to left circular arc body of left side salient key, the width more than or equal to right circular arc body's of right side salient key thickness.
The positions of the left protruding key and the right protruding key close to the top ends of the left protruding key and the right protruding key are respectively provided with a through key through hole, and the two ends of the key through hole are respectively communicated with the nylon rod hole and the disc cavity.
The outer side wall of the rotating disc is connected with the handle.
A use method of the petal type rotatable damping wellhead packing box comprises the following steps:
the offset adjusting step comprises the following steps: in the upper box body, the petal-type damper, the lower box body and the oil pipe interface eccentric device which are sequentially arranged from top to bottom, a polished rod of the pumping unit longitudinally moves up and down in a reciprocating mode, meanwhile, the petal-type damper plays a role in righting the polished rod of the pumping unit, the polished rod of the pumping unit can deflect in the moving process, the petal-type damper can be subjected to eccentric wear by the deflected polished rod of the pumping unit, at the moment, the rotating disc is rotated to drive the petal-type damper in the rotating disc to rotate, so that the part on the petal-type damper, which is subjected to eccentric wear, is moved away from a friction position, and the part on the petal-type damper, which is not subjected to eccentric wear, is moved to the friction;
the friction position is as follows: in this position, the deviated polished rod of the pumping unit can generate contact friction with the petal type damper, and the petal type damper is subjected to eccentric wear.
The using method also comprises the steps of dismantling and replacing:
the step of replacing is as follows: the operation of this packing box stops earlier, slides upward along the beam-pumping unit polished rod with last letter body in order to expose lamella formula ni and the left circular arc body, the right circular arc body of inside thereof, then upwards takes out the replaced part that needs the replacement, should be replaced and be said left circular arc body or right circular arc body or both are whole, inserts in order to fill the former position of replaced part in the dish chamber with replacing part again, at last, slides down along the beam-pumping unit polished rod with last letter body in order to accomplish and reset.
The positions, close to the top ends of the left protruding key and the right protruding key, of the left protruding key and the right protruding key are respectively provided with a through key through hole;
the upward extraction of the replaced parts needing to be replaced refers to the following steps: the key through hole is hooked first, and then the replacement part is lifted upwards to be pulled out upwards.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention relates to a petal type rotatable damping wellhead packing box and a using method thereof, wherein a rotating disc is arranged between an upper box body and a lower box body, petal type dampers are embedded in the rotating disc, the petal type dampers are of split structures and comprise a left arc body and a right arc body, when the packing box is applied, a polish rod of an oil pumping unit penetrates through a damping rod hole formed by splicing the left arc body and the right arc body and moves up and down in a reciprocating manner, when the polish rod of the oil pumping unit deviates and the petal type dampers are deviated, namely any one part on the left arc body and the right arc body deviates, the whole damper does not need to be replaced, only the part with the deviated type dampers is moved away by rotating the rotating disc, and the part without the deviated type dampers is moved upwards, so that the continuous operation of the polish rod of the oil pumping unit can be ensured, the operation is simple and easy, the time and labor cost are saved, and the petal type dampers can be fully utilized, no waste of material is obtained. Therefore, the invention solves the problem of eccentric wear with low cost.
2. In the flap type rotatable damping wellhead packing box and the use method thereof, when the offset adjustment step is carried out, only the rotating disc needs to be rotated, the operation is simple, the damping valve can fully play a damping role, and the use rate of the damping valve is improved. Therefore, the invention not only solves the problem of eccentric wear with low cost, but also is easy to operate and has high utilization rate.
3. In the petal type rotatable Ning wellhead packing box and the use method thereof, when the disassembly and replacement steps are carried out, only the upper extraction of the replaced part and the lower insertion of the replaced part are required to be carried out in sequence, and the disassembly or the replacement of the whole packing box are not required. Therefore, the invention not only solves the eccentric wear problem with low cost, but also is easy to operate.
4. In the petal-type rotatable damping wellhead packing box and the use method thereof, the left key groove and the right key groove arranged on the plate surface are correspondingly embedded and matched with the left convex key and the right convex key, so that the petal-type damping can be fixed in the rotating disc, the connection firmness is improved, the realization of the rotating effect is ensured, the relative sliding of the petal-type damping and the rotating disc can be avoided, the operation stability is ensured, in addition, when the parts, close to the top ends of the left convex key and the right convex key, of the left convex key and the right convex key are respectively provided with a through key through hole, the key through holes are also beneficial to lifting the left arc body and the right arc body, and the dismounting and replacing efficiency is improved. Therefore, the invention has the advantages of higher firmness, stronger stability, easy operation and stronger convenience.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the lobed form of the damper of fig. 1.
Fig. 3 is a top view of the rotating disk of the present invention.
In the figure: the pumping unit polish rod 1, the upper box body 2, the lower box body 3, the oil pipe interface eccentric device 4, the rotating disc 5, the disc cavity 51, the disc surface 52, the left key groove 53, the right key groove 54, the petal type nylon 6, the left arc body 61, the right arc body 62, the nylon rod hole 63, the left convex key 64, the right convex key 65, the key through hole 66 and the handle 7.
Detailed Description
The present invention will be described in further detail with reference to the following description and embodiments in conjunction with the accompanying drawings.
Referring to fig. 1-3, a petal-type rotatable damping wellhead packing box comprises a pumping unit polished rod 1, an upper box body 2, a lower box body 3 and an oil pipe interface eccentric device 4 which are sequentially sleeved on the polished rod 1;
go up and be provided with hollow rolling disc 5 between the letter body 2, the lower letter body 3, inlayed lamella formula ni gu 3 in the inside dish chamber 51 of this rolling disc 5, this lamella formula ni gu 6 includes left circular arc body 61 and right circular arc body 62, and left circular arc body 61, right circular arc body 62 splice each other in order to form ni gudgeon rod hole 63, run through in this ni gudgeon rod hole 63 and cross there is beam-pumping unit polished rod 1.
The cross sections of the rotating disc 5 and the petal-type nylon 6 are circular or similar circular structures.
The outer side wall of the left arc body 61 is connected with the left protruding key 64, the inner side wall of the left arc body 61 is opposite to the inner side wall of the right arc body 62, and the outer side wall of the right arc body 62 is connected with the right protruding key 65; the disc surface 52 of the rotating disc 5 is provided with a left key groove 53 and a right key groove 54 which are communicated with the disc cavity 51, a left convex key 64 is embedded in the left key groove 53, and a right convex key 65 is embedded in the right key groove 54.
The width of the left protruding key 64 is greater than or equal to the thickness of the left arc body 61, and the width of the right protruding key 65 is greater than or equal to the thickness of the right arc body 62.
The left protruding key 64 and the right protruding key 65 are respectively provided with a through key through hole 66 near the top end thereof, and the two ends of the key through hole 66 are respectively communicated with the damping rod hole 63 and the disc cavity 51.
The outer side wall of the rotating disc 5 is connected with a handle 7.
A use method of the petal type rotatable damping wellhead packing box comprises the following steps:
the offset adjusting step comprises the following steps: in the upper box body 2, the petal-type nylon 6, the lower box body 3 and the oil pipe interface eccentric device 4 which are sequentially arranged from top to bottom, the polished rod 1 of the pumping unit vertically reciprocates, meanwhile, the petal-type nylon 6 plays a role in righting the polished rod 1 of the pumping unit, the polished rod 1 of the pumping unit can deviate in the motion process, the petal-type nylon 6 can be eccentrically worn by the deviated polished rod 1 of the pumping unit, at the moment, the rotating disc 5 is rotated to drive the petal-type nylon 6 in the rotating disc 5 to rotate, so that the part of the petal-type nylon 6, which is eccentrically worn, is moved away from the friction position, and the part of the petal-type nylon 6, which is not eccentrically worn, is moved to the friction position;
the friction position is as follows: in this position, the deviated polished rod 1 of the pumping unit can contact and rub the petal-type damper 6, and the petal-type damper 6 is deviated and worn.
The using method also comprises the steps of dismantling and replacing:
the step of replacing is as follows: firstly stopping the operation of the packing box, then sliding the upper box body 2 upwards along the polish rod 1 of the oil pumping unit to expose the flap type nylon 6 and the left arc body 61 and the right arc body 62 inside the flap type nylon 6, then upwards drawing out a replaced part needing to be replaced, wherein the replaced part refers to the left arc body 61 or the right arc body 62 or both of the left arc body and the right arc body, then inserting the replaced part into the disc cavity 51 to fill the original position of the replaced part, and finally, sliding the upper box body 2 downwards along the polish rod 1 of the oil pumping unit to complete resetting.
The positions of the left protruding key 64 and the right protruding key 65 close to the top ends thereof are respectively provided with a through key through hole 66;
the upward extraction of the replaced parts needing to be replaced refers to the following steps: the key through hole 66 is hooked first, and then the replacement part is lifted upwards to draw out the replacement part upwards.
The principle of the invention is illustrated as follows:
in practical application, when beam-pumping unit polished rod 1 takes place the skew to lead to lamella formula buddhist nun to hold 6 when taking place the eccentric wear, still remain a lot of positions on the lamella formula buddhist nun holds 6 and can use, at this moment, if with the replacement of lamella formula buddhist nun holds 6, not only waste spare part, reduce its utilization ratio, can increase extra replacement time and cost moreover. Therefore, the structure of the petal-type damper 6 is improved, the rotating disc 5 which is cooperated with the petal-type damper is designed, and at the moment, even if eccentric wear occurs, replacement is not needed, only the rotating disc 5 is rotated until no residual part on the petal-type damper 6 is left to damp the polished rod 1 of the pumping unit, and replacement is needed, so that the utilization rate of the petal-type damper 6 is greatly improved, and the cost of parts is saved. In addition, even if the replacement is needed, the petal-type damper 6 is easy to detach and replace, other parts in the packing box do not need to be damaged, the operation time is saved, and the replacement cost is reduced.
Example 1:
referring to fig. 1-3, a petal-type rotatable damping wellhead packing box comprises a pumping unit polished rod 1, an upper box body 2, a lower box body 3 and an oil pipe interface eccentric device 4 which are sequentially sleeved on the polished rod 1; go up and be provided with hollow rolling disc 5 between the letter body 2, the lower letter body 3, inlayed lamella formula ni gu 3 in the inside dish chamber 51 of this rolling disc 5, this lamella formula ni gu 6 includes left circular arc body 61 and right circular arc body 62, and left circular arc body 61, right circular arc body 62 splice each other in order to form ni gudgeon rod hole 63, run through in this ni gudgeon rod hole 63 and cross there is beam-pumping unit polished rod 1. The cross section of the rotating disc 5 and the petal-shaped nylon 6 is preferably circular or similar circular structure.
A use method of the petal type rotatable damping wellhead packing box comprises the following steps: the offset adjusting step comprises the following steps: in the upper box body 2, the petal-type nylon 6, the lower box body 3 and the oil pipe interface eccentric device 4 which are sequentially arranged from top to bottom, the polished rod 1 of the pumping unit vertically reciprocates, meanwhile, the petal-type nylon 6 plays a role in righting the polished rod 1 of the pumping unit, the polished rod 1 of the pumping unit can deviate in the motion process, the petal-type nylon 6 can be eccentrically worn by the deviated polished rod 1 of the pumping unit, at the moment, the rotating disc 5 is rotated to drive the petal-type nylon 6 in the rotating disc 5 to rotate, so that the part of the petal-type nylon 6, which is eccentrically worn, is moved away from the friction position, and the part of the petal-type nylon 6, which is not eccentrically worn, is moved to the friction position; the friction position is as follows: in this position, the deviated polished rod 1 of the pumping unit can contact and rub the petal-type damper 6, and the petal-type damper 6 is deviated and worn.
Example 2:
the basic contents are the same as example 1, except that:
the use method also comprises a dismantling step, wherein the dismantling step is as follows: firstly stopping the operation of the packing box, then sliding the upper box body 2 upwards along the polish rod 1 of the oil pumping unit to expose the flap type nylon 6 and the left arc body 61 and the right arc body 62 inside the flap type nylon 6, then upwards drawing out a replaced part needing to be replaced, wherein the replaced part refers to the left arc body 61 or the right arc body 62 or both of the left arc body and the right arc body, then inserting the replaced part into the disc cavity 51 to fill the original position of the replaced part, and finally, sliding the upper box body 2 downwards along the polish rod 1 of the oil pumping unit to complete resetting.
Example 3:
the basic content is the same as that of the embodiment 2, except that:
structurally: the outer side wall of the left arc body 61 is connected with the left protruding key 64, the inner side wall of the left arc body 61 is opposite to the inner side wall of the right arc body 62, and the outer side wall of the right arc body 62 is connected with the right protruding key 65; a left key groove 53 and a right key groove 54 which are communicated with a disc cavity 51 are arranged on the disc surface 52 of the rotating disc 5, a left convex key 64 is embedded in the left key groove 53, and a right convex key 65 is embedded in the right key groove 54; the left protruding key 64 and the right protruding key 65 are respectively provided with a through key through hole 66 near the top end thereof.
The method comprises the following steps: the upward extraction of the replaced parts needing to be replaced refers to the following steps: the key through hole 66 is hooked first, and then the replacement part is lifted upwards to draw out the replacement part upwards.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiment, but equivalent modifications or changes made by those skilled in the art according to the present disclosure should be included in the scope of the present invention as set forth in the appended claims.
Claims (8)
1. The utility model provides a rotatable ni wei dao packing box of lamella formula, includes beam-pumping unit polished rod (1) and goes up letter body (2), the letter body (3), oil pipe interface eccentric device (4) of establishing of overlapping in proper order, its characterized in that:
a hollow rotating disc (5) is arranged between the upper box body (2) and the lower box body (3), a petal-type damper (6) is embedded in a disc cavity (51) in the rotating disc (5), the petal-type damper (6) comprises a left arc body (61) and a right arc body (62), the left arc body (61) and the right arc body (62) are spliced with each other to form a damper rod hole (63), and a pumping unit polished rod (1) penetrates through the damper rod hole (63);
the outer side wall of the left arc body (61) is connected with the left protruding key (64), the inner side wall of the left arc body (61) is opposite to the inner side wall of the right arc body (62), and the outer side wall of the right arc body (62) is connected with the right protruding key (65); the novel rotary disc is characterized in that a left key groove (53) and a right key groove (54) which are communicated with a disc cavity (51) are formed in the disc surface (52) of the rotary disc (5), a left protruding key (64) is embedded into the left key groove (53), and a right protruding key (65) is embedded into the right key groove (54).
2. The petal type rotatable damping wellhead packing box according to claim 1, wherein: the cross sections of the rotating disc (5) and the petal-type nylon (6) are circular or similar circular structures.
3. The petal type rotatable damping wellhead packing box according to claim 1, wherein: the width more than or equal to of left bulge key (64) is the thickness of left circular arc body (61), the width more than or equal to of right bulge key (65) is the thickness of right circular arc body (62).
4. The petal type rotatable damping wellhead packing box according to claim 1, wherein: the positions, close to the top ends of the left protruding key (64) and the right protruding key (65), are respectively provided with a through key through hole (66), and two ends of the key through hole (66) are respectively communicated with the nylon rod hole (63) and the disc cavity (51).
5. The petal type rotatable damping wellhead packing box according to claim 1 or 2, wherein: the outer side wall of the rotating disc (5) is connected with a handle (7).
6. A method of using the petal type rotatable damping wellhead packing kit of claim 1 or 2, wherein: the using method comprises the following steps:
the offset adjusting step comprises the following steps: in the interior of an upper box body (2), a petal-type damper (6), a lower box body (3) and an oil pipe interface eccentric device (4) which are sequentially arranged from top to bottom, a polished rod (1) of the pumping unit vertically moves in a reciprocating mode, meanwhile, the petal-type damper (6) has a function of righting the polished rod (1) of the pumping unit, the polished rod (1) of the pumping unit can deviate in the moving process, the petal-type damper (6) can be eccentrically worn by the deviated polished rod (1) of the pumping unit, at the moment, a rotating disc (5) is rotated to drive the petal-type damper (6) in the rotating disc (5) to rotate, so that the part, which is eccentrically worn, on the petal-type damper (6) is moved away from a friction position, and the part, which is not eccentrically worn, on the petal-type damper (6) is moved to the friction position;
the friction position is as follows: in the position, the deviated polished rod (1) of the pumping unit can generate contact friction with the petal-type damper (6) and cause eccentric wear of the petal-type damper (6).
7. The method of using a petal type rotatable damping wellhead packing kit according to claim 6, wherein the method comprises the following steps: the using method also comprises the steps of dismantling and replacing:
the step of replacing is as follows: the operation of this packing box stops earlier, upwards slide last letter body (2) along beam-pumping unit polished rod (1) again in order to expose lamella formula nylon (6) and inside left circular arc body (61), right circular arc body (62), then upwards take out the replaced part that needs the replacement, this replaced part is left circular arc body (61) or right circular arc body (62) or both are whole, insert in order to fill the former position of replaced part in will replacing part to dish chamber (51), finally, slide last letter body (2) down along beam-pumping unit polished rod (1) in order to accomplish and reset.
8. The method of using a petal type rotatable damping wellhead packing kit according to claim 7, wherein the method comprises the following steps: the positions, close to the top ends of the left protruding key (64) and the right protruding key (65), are respectively provided with a through key through hole (66);
the upward extraction of the replaced parts needing to be replaced refers to the following steps: the key through hole (66) is hooked first, and then the key is lifted upwards to draw out the replaced part to be replaced upwards.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910145748.3A CN109798083B (en) | 2019-02-27 | 2019-02-27 | Petal type rotatable damping wellhead packing box and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910145748.3A CN109798083B (en) | 2019-02-27 | 2019-02-27 | Petal type rotatable damping wellhead packing box and use method thereof |
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| CN109798083B true CN109798083B (en) | 2021-04-27 |
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|---|---|---|---|---|
| RU2093663C1 (en) * | 1993-07-23 | 1997-10-20 | Владимир Александрович Челбин | Well head sealing gland |
| CN2898274Y (en) * | 2005-12-19 | 2007-05-09 | 辽河石油勘探局 | High-temperature-resisting abrasive polish-rod sealer of pump well |
| CN201031655Y (en) * | 2007-04-10 | 2008-03-05 | 新疆维吾尔自治区第三机床厂 | Pumping well adjustable polarization rod seal device |
| CN202401999U (en) * | 2011-12-02 | 2012-08-29 | 辽宁跨克石油装备有限公司 | Multifunctional well mouth sealer |
| CN202689992U (en) * | 2012-03-30 | 2013-01-23 | 洪河 | Packing box with packing box body capable of moving horizontally |
| CN204371192U (en) * | 2014-12-04 | 2015-06-03 | 中国石油天然气股份有限公司 | Wellhead packing box of oil pumping unit |
| CN205259993U (en) * | 2015-11-25 | 2016-05-25 | 西安山川石油科技有限责任公司 | High pressure doublestage seals up prevents gusher mouth packing box |
| CN205895169U (en) * | 2016-08-11 | 2017-01-18 | 成都振剑石油科技有限公司 | Packing is right to combined type beam -pumping unit polished rod |
-
2019
- 2019-02-27 CN CN201910145748.3A patent/CN109798083B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2093663C1 (en) * | 1993-07-23 | 1997-10-20 | Владимир Александрович Челбин | Well head sealing gland |
| CN2898274Y (en) * | 2005-12-19 | 2007-05-09 | 辽河石油勘探局 | High-temperature-resisting abrasive polish-rod sealer of pump well |
| CN201031655Y (en) * | 2007-04-10 | 2008-03-05 | 新疆维吾尔自治区第三机床厂 | Pumping well adjustable polarization rod seal device |
| CN202401999U (en) * | 2011-12-02 | 2012-08-29 | 辽宁跨克石油装备有限公司 | Multifunctional well mouth sealer |
| CN202689992U (en) * | 2012-03-30 | 2013-01-23 | 洪河 | Packing box with packing box body capable of moving horizontally |
| CN204371192U (en) * | 2014-12-04 | 2015-06-03 | 中国石油天然气股份有限公司 | Wellhead packing box of oil pumping unit |
| CN205259993U (en) * | 2015-11-25 | 2016-05-25 | 西安山川石油科技有限责任公司 | High pressure doublestage seals up prevents gusher mouth packing box |
| CN205895169U (en) * | 2016-08-11 | 2017-01-18 | 成都振剑石油科技有限公司 | Packing is right to combined type beam -pumping unit polished rod |
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| Publication number | Publication date |
|---|---|
| CN109798083A (en) | 2019-05-24 |
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Effective date of registration: 20191209 Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Applicant after: China Petrochemical Co., Ltd. Applicant after: Jianghan Oil Production Plant of SINOPEC Jianghan Oilfield Company Address before: 433123 No.1, Xiangyang development road, Qianjiang City, Hubei Province Applicant before: Jianghan Oil Production Plant of SINOPEC Jianghan Oilfield Company |
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