CN104948138A - Online detection and treatment method and system for acidizing fluid - Google Patents
Online detection and treatment method and system for acidizing fluid Download PDFInfo
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- CN104948138A CN104948138A CN201510208235.4A CN201510208235A CN104948138A CN 104948138 A CN104948138 A CN 104948138A CN 201510208235 A CN201510208235 A CN 201510208235A CN 104948138 A CN104948138 A CN 104948138A
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Abstract
The invention provides an online detection and treatment method and system for acidizing fluid. A system capable of detecting and handling whether produced fluid contains the acidizing fluid or not is arranged between an oil production work wellhead and an oil delivery pipeline; when the circumstance that the produced fluid contains the acidizing fluid is detected, the produced fluid is automatically guided into a produced fluid pipeline, a proper amount of acidizing treatment agent is adjusted to be mixed with the produced fluid, and the produced fluid with the acidizing fluid removed is returned to the oil delivery pipeline, so that accidents of forming acidized oil due to the fact that the acidizing fluid enters a gathering and transporting system can be avoided effectively. The online detection and treatment method and system is especially suitable for offshore oil production platforms where normal production process does not need to be guarded; through an automated realtime detection and treatment system, production efficiency and safety are improved better.
Description
Technical field
The present invention relates to exploitation technology field, relate to a kind of on-line checkingi of acidifying solution and processing method and system specifically, enter gathering system effectively to avoid acidifying solution and the accident causing acidification oil to be formed.
Background technology
After crude oil production well produces a period of time, because formation void can, by organic or inorganic impurity blocks, cause oil extraction output to reduce gradually, now, need to implement oil producing operation measure to this producing well, formation space is implemented de-plugging and is increased, thus improves this production well yield.Oil producing operation measure conventional in current crude oil production is acidifying and pressure break, injects appropriate acid solution, to reach plugging removal effect in stratum.After operation completes, the operation raffinate returning discharge can be transported and focus on by oil producing operation construction party.These return discharge opeing is acid solution and the reacted product of impurity be blocked in formation void in theory, but for reaching plugging removal effect, acid solution usually can be excessive, and causing returning discharge opeing can containing acid.In practical operation, can not accomplish that all returning discharge opeing is all collected, always have a small amount of residual defeated mode of discharge opeing process pipe of returning and enter gathering system.Although be that a small amount of discharge opeing of returning enters controlling methodology of oil pipeline, to return in discharge opeing the residual acid completely of residual unreacted can with crude oil slow reaction and form the acidification oil being difficult to dewater.Acidification oil not only itself is difficult to dehydration, after mixing with normal crude oil, also can cause chain reaction, cause normally oil dehydration difficulty, and then it is difficult to cause whole gathering system to dewater, and gathering system even can be caused time serious to paralyse.This result has been difficult to sign forecast before occurring, the situation in production is, often the acidifying of tens of tons is returned the acidification oil that discharge opeing formed the multi-purpose station in the tens thousand of ton/sky for the treatment of scale will be caused to paralyse.
As known property general knowledge, acidification oil harm is very huge, and the detection of this phenomenon is very difficult, more difficultly accomplishes effective prevention, when waiting until that accident occurs often, could judge it is that acidification oil causes.Now only have and stop production to clear up collector and delivery pipe road.The formation of acidification oil and existence have had a strong impact on the normal production in oil field, and when there is acidification oil accident, the mode that multi-purpose station often takes the normal crude oil isolation of acidification oil and acidification oil being polluted to store, pollution crude oil is placed in emergency storage tank, raise dehydration temperaturre, leave standstill tens of sky and carry out high temperature dehydration process, until qualified time could be defeated outward.
On the other hand; the current detection for acidification oil and examination are also without any effective ways; can only be when a fault occurs; judged after the analysis of complexity by experienced technician; in addition not yet have good method and mode to the process of acidification oil, acidification oil is become affects the key factor of crude oil production normalization.Particularly for unattended offshore platform production system, once stop production because there is acidification oil accident, the loss of generation is difficult to estimate especially.
Summary of the invention
The invention provides a kind of acidifying solution on-line checkingi and processing method, detect and process in real time by carrying out real-time online to the Produced Liquid entering gathering line system, avoid acidifying solution enter gathering system and cause the formation of acidification oil.
Present invention also offers a kind of system realizing on-line checkingi and process acidifying solution, be arranged between crude oil well head and petroleum pipeline, the real-time detection to Produced Liquid can be realized, and the acidifying solution detected is processed in time, stop acidifying solution and entered gathering system.
Acidifying solution on-line checkingi provided by the invention and processing method, comprise following process:
Acidifying solution monitoring device is set between crude oil work well head and petroleum pipeline, petroleum pipeline arranges crude oil import control valve, be connected with on the pipeline between crude oil import control valve the Produced Liquid pipeline be conducted with it at crude oil work well head, and being provided with Produced Liquid control valve, this acidifying solution monitoring device can manipulate the keying of crude oil import control valve and Produced Liquid control valve;
On described Produced Liquid pipeline, series winding arranges pipe-line mixer, and the Produced Liquid pipeline of described pipe-line mixer front end arranges medicine system, this medicine system can to the agent of Produced Liquid Cemented filling acidification, and the Produced Liquid pipeline of pipe-line mixer rear end is communicated with petroleum pipeline;
Make the acidified liquid monitoring device of Produced Liquid from active well, when detecting that the changing value of Produced Liquid acescency and/or electrical conductivity exceedes setting category, closing crude oil import control valve and opening Produced Liquid control valve, making Produced Liquid enter Produced Liquid pipeline;
Medicine system starts agent-feeding treatment according to detected Produced Liquid acescency, makes acidification agent and Produced Liquid through metering jointly enter pipe-line mixer and mixed and react, Produced Liquid feeding petroleum pipeline after the process that pipe-line mixer is discharged.
According to method of the present invention, wherein, when acidifying solution monitoring device detects that Produced Liquid pH value exceeds 6-8, namely its changing value exceedes setting category.
In embodiment of the present invention, when acidifying solution monitoring device detects that the changing value of Produced Liquid pH value and electrical conductivity exceedes setting category, close crude oil import control valve and open Produced Liquid control valve, making Produced Liquid enter Produced Liquid pipeline.
In embodiment of the present invention, detect that the nature parameters of Produced Liquid changes, refer to that the parameter such as acescency (pH value usually can be adopted to represent), electrical conductivity of Produced Liquid is compared to conventional state generation significant change, such as acescency deviate from neutral category, in conjunction with the indexs such as electrical conductivity variable condition (such as change by a relatively large margin occurs suddenly numerical value) and determine it is due to wherein containing caused by acidifying solution, then start medicine system for medicine, namely, appropriate acidifying solution treatment agent is provided in Produced Liquid, acidifying solution is wherein eliminated through reaction.The acidification agent used meets the demands can make the character of acidifying solution (such as the parameter such as pH and/or electrical conductivity), it has been generally acknowledged that the pH of Produced Liquid maintains 6-8, can not impact crude oil acidifying, namely, when acidifying solution monitoring device detect Produced Liquid pH value lower than 6 or higher than 8 time, then think and exceed setting category, because this can impact crude oil acidification technique.So the change of the acescency of Produced Liquid more should be paid close attention to comparatively speaking, the exceeding tolerance interval and then can determine that acidifying solution is formed further of conductivity variations.As judging the auxiliary characteristics that acidifying solution is formed, the determination of conductivity variations scope can be determined according to the specific nature of Produced Liquid, and such as, conductivity values, compared to undergoing mutation before, is thought and to be impacted crude oil acidifying.The specific nature of based on crude, can select suitable inorganic agent.In specific embodiment of the invention scheme, the composition of described acidification agent (according to Site Detection to Produced Liquid in the amount of contained acidifying solution, calculate by percentage to the quality) can comprise: water-soluble demulsifier 10-20%, corrosion inhibiter 2-5%, auxiliary agent 1-4%, surplus are buffer.Certainly, the concrete selection of each composition also can based on crude character and determine, but all need the character of guarantee Produced Liquid can meet crude oil production process requirement.More specifically, the composition of described acidification agent comprises: water-soluble demulsifier 15%, corrosion inhibiter 3%, auxiliary agent 2%, buffer 80%.
In embodiment of the present invention, described water-soluble demulsifier based on crude physical property is chosen, the various crude oil demulsifiers used during production platform process can be adopted, the anionics such as such as metal carboxylate, quaternary ammonium salts be cationic, with nonionic, amphoteric ion type demulsifiers etc. such as amine or the alcohols block polyethers that is initiator.Wherein, the addition of demulsifier needs the moisture content of based on crude Produced Liquid to adjust, and can be 2 times according to the normal addition of production platform, such as, based on the amount of acidifying solution contained in Produced Liquid, adds the demulsifier that mass percent is 10-20%.
In embodiment of the present invention, described corrosion inhibiter is the auxiliary agent slowing down crude oil corrosion, the corrosion inhibiter used in production platform sewage disposal system can be adopted, such as imidazolines, season molysite class, fatty amines, amide derivatives class, the organic inhibitor such as pyridine derivate class.
In embodiment of the present invention, the acescency of acidifying solution during described auxiliary agent is used for and in Produced Liquid, its addition is then determined according to the amount of the actual acidifying solution detected, to make the character of acidifying solution meet the demands, such as, can adopt the common alkali such as NaOH.
In embodiment of the present invention, described buffer is used for ensureing after treatment, Produced Liquid is substantially neutral (pH value 6-8), weak base buffer can be adopted in specific implementation process, such as sodium carbonate and sodium acid carbonate proportioning are the mixed liquor of 2:1, wherein, the addition of buffer should ensure that the character of Produced Liquid meets production requirement.
Detection of the present invention and processing method, the medicine system adopted can comprise acidifying solution checkout gear, itself and Produced Liquid pipeline communication, and be connected with the metering control module (such as dosing pump flow-control module) of medicine system, this metering control module is then connected with the metering-type dosing pump of medicine system, the entrance point of this metering-type dosing pump is connected to for medicine container (such as pharmacy jar), and the port of export is then connected in the Produced Liquid pipeline of pipe-line mixer front end; Described metering control module, according to the acescency of detected Produced Liquid, controls the acidification agent that metering-type dosing pump provides required dosage in Produced Liquid pipeline.By arranging acidifying solution checkout gear, when being determined the Produced Liquid forming acidifying solution and flowing through, the detection module of acidifying solution checkout gear accurately can detect the acescency of Produced Liquid, and information is passed to metering control module, and then control confession dose (i.e. the addition of acidification agent) that metering-type dosing pump provides required dosage.
In embodiment of the present invention, for ensureing that the acidifying solution in Produced Liquid can be processed up to standard completely, the pipe-line mixer of multiple series connection can be set, that is, make the acidification agent through measuring and Produced Liquid order flow through more than two pipe-line mixers to complete acidification process.
The present invention proposes based on the production status of oil recovery business, by a set of feasible design and implementation means, realize carrying out real-time online to the Produced Liquid entering gathering line system to detect and process in real time, finally avoid acidifying solution enter gathering system and cause the formation of acidification oil.To those skilled in the art, once clearly such design philosophy and implementation framework, in implementation process, for the formation detecting acidifying solution in Produced Liquid, and select the medicament that can realize acidifying solution process and method of application, according to the concrete feature of applied environment and base oil properties, multiple means and concrete scheme can be had.
Present invention also offers the system for realizing aforementioned acidifying solution on-line checkingi and processing method, it is arranged between crude oil work well head and petroleum pipeline, and this system comprises:
The acidifying solution monitoring device be connected with petroleum pipeline and crude oil import control valve, be arranged at the pipeline between crude oil work well head and crude oil import control valve and the Produced Liquid pipeline be conducted with it, and being arranged at the ducted Produced Liquid control valve of this Produced Liquid, described acidifying solution monitoring device can manipulate the keying of crude oil import control valve and Produced Liquid control valve;
On described Produced Liquid pipeline, string is provided with pipe-line mixer, and the Produced Liquid pipeline of this pipe-line mixer front end is connected with medicine system connection, and the Produced Liquid pipeline of pipe-line mixer rear end is communicated with petroleum pipeline.
In the present invention, " pipe-line mixer front end " refers to the arrival end of first blender that Produced Liquid flows through, and correspondingly, " pipe-line mixer rear end " then refers to the outflow end of the least significant end blender that Produced Liquid flows through.
System of the present invention, wherein, described acidifying solution monitoring device has the detection module of acescency (common available pH represents) and/or the conductivity variations that can detect the Produced Liquid flowed through, this detection module is consistent with the detection module in acidifying solution checkout gear, just add PLC SCM program control module, this PLC control module can calculate according to the data detected the amount that Produced Liquid needs to add automatically, and the addition of Produced Liquid is regulated further by the aperture controlling Produced Liquid control valve (motor operated valve), make it to mate with the dose that supplies of metering-type dosing pump, more be conducive to the neutralisation treatment controlling acidifying solution in Produced Liquid, the Produced Liquid finally flowed out through pipe-line mixer is met the requirements.
In system of the present invention, described acidifying solution monitoring device also has control module, when the detection module in described acidifying solution monitoring device detects that the pH of Produced Liquid and/or conductivity variations exceed setting category, this control module can control close crude oil import control valve and open Produced Liquid control valve.
In system of the present invention, described medicine system can comprise acidifying solution checkout gear, itself and Produced Liquid pipeline communication, and be connected with the metering control module of medicine system, this metering control module is then connected with the metering-type dosing pump of medicine system, the entrance point of this metering-type dosing pump is connected to for medicine container (such as pharmacy jar), and the port of export is then connected in the Produced Liquid pipeline of pipe-line mixer front end.
To sum up, the invention provides the method and system of the acidifying solution in a kind of energy on-line checkingi and process Produced Liquid, inventor sums up discovery in long-term production and research practice, acid solution de-plugging operation is difficult to avoid producing acid solution and remains, these residual acid solutions reach a certain amount of, will cause forming acidifying solution in Produced Liquid, the formation of acidification oil is exactly cause because excessive acidifying solution is mixed into crude oil with Produced Liquid.So realization of the present invention can be stopped acidifying solution from source and is mixed into crude oil, directly eliminate the factor of acidification oil, thus avoid the generation of acidification oil accident to greatest extent.
The method and system of acidifying solution in on-line checkingi provided by the invention and process Produced Liquid, be particularly useful for large-scale industrial production, particularly offshore production platform, normal productive process is unmanned, the real-time detection of this automation and treatment system, more improve efficiency and the safety of production.
Accompanying drawing explanation
Fig. 1 is the embodiment schematic diagram of acidifying solution on-line checkingi provided by the invention and treatment system.
Number in the figure is defined as follows:
1 (11), producing well petroleum pipeline; 2, acidifying solution monitoring device; 3, crude oil import control valve (motor operated valve); 4, Produced Liquid control valve (motor operated valve); 5, acidifying solution checkout gear; 6, dosing pump flow-control module; 7, pharmacy jar; 8, strainer; 9, metering-type dosing pump; 10, pipe-line mixer.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the implementation process setting forth further the present invention program and the beneficial effect produced, but can not be interpreted as can any restriction of embodiment and scope to the present invention.
With reference to figure 1, this Operation system setting is between the well head and petroleum pipeline 1 (11) of producing well, acidifying solution monitoring device 2 is arranged on petroleum pipeline, this petroleum pipeline leads to oil recovery header direction and arranges crude oil import control valve (motor operated valve) 3, the Produced Liquid pipeline be connected and Produced Liquid control valve (motor operated valve) 4 is provided with in petroleum pipeline between acidifying solution monitoring device 2 with this crude oil import control valve (motor operated valve) 3, the Produced Liquid pipeline of this Produced Liquid control valve (motor operated valve) 4 rear end is linked in sequence medicine system and pipe-line mixer 10, medicine system comprises the acidifying solution checkout gear 5 be connected with Produced Liquid pipeline and the dosing pump flow-control module 6 linked with acidifying solution checkout gear 5, this medicine system also comprises pharmacy jar 7 and is communicated with the metering-type dosing pump 9 of pharmacy jar 7 and Produced Liquid pipeline respectively, and this metering-type dosing pump 9 is connected to the Produced Liquid pipeline of pipe-line mixer 10 front end, the Produced Liquid pipeline of pipe-line mixer 10 rear end is then connected to petroleum pipeline 1 (11), between the outlet of pharmacy jar 7 and metering-type dosing pump 9, strainer 8 can also be set.
Producing well is under normal production scenarios, and crude oil import control valve 3 is opened, and Produced Liquid control valve 4 is closed, and the Produced Liquid that well head is discharged directly flows through petroleum pipeline 1 (11) and enters oil recovery header and be transferred.
When the Produced Liquid containing acidifying solution flows out, acidifying solution monitoring device 2 detects that by detection module the ginseng money changes such as pH value in Produced Liquid and electrical conductivity exceed setting category, particularly, when the pH value of Produced Liquid deviate from 6-8 scope, point out electrical conductivity to have ANOMALOUS VARIATIONS (such as conductivity values is compared to undergoing mutation before) simultaneously, then can judge in Produced Liquid containing acidifying solution, control module in acidifying solution monitoring device 2 controls crude oil import control valve 3 and slowly closes, control Produced Liquid control valve 4 slowly to open simultaneously, make Produced Liquid change the flow direction and enter Produced Liquid pipeline, arrive acidifying solution checkout gear 5, detection module now in acidifying checkout gear 5 accurately can detect the content (i.e. acescency) of acidifying solution in Produced Liquid, and information is passed to dosing pump flow-control module 6, and then control metering-type dosing pump 9 is opened, acidification medicament in pharmacy jar 7 is sent into Produced Liquid pipeline through strainer 8 with required discharge capacity by metering-type dosing pump 9, pipe-line mixer 10 is together entered with ducted Produced Liquid, through the pipe-line mixer 10 of multiple series connection, the two is mixed and react, acidifying solution is wherein neutralized, meet the requirements when the pipe-line mixer of rearmost end flows out, can again send into petroleum pipeline 11, be incorporated to oil recovery header, doing so avoids acidifying solution and be mixed into crude oil and the generation causing acidification oil.
Parameters variation is not detected when Produced Liquid flows through acidifying solution monitoring device 2, namely think wherein not containing acidifying solution, belong to normal Produced Liquid, now the control module of acidifying solution monitoring device 2 can control Produced Liquid control valve 4 and slowly closes, control crude oil import control valve 3 slowly to open simultaneously, recover normal flow.
Above-mentioned processing procedure, from pharmacy jar 7 acidification agent consist of water-soluble demulsifier 15%, corrosion inhibiter 3%, auxiliary agent 2%, buffer 80%, wherein water-soluble demulsifier is with nonionics such as amine or the alcohols block polyethers that is initiator, such as polyethylene polyamine block polyether, corrosion inhibiter is imidazoline corrosion inhibitor, the quaternary ammonium salt of such as imidazoline, auxiliary agent is NaOH, and buffer is sodium carbonate and sodium acid carbonate proportioning is the mixed liquor of 2:1.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. acidifying solution on-line checkingi and a processing method, comprises following process:
Acidifying solution monitoring device is set between crude oil work well head and petroleum pipeline, petroleum pipeline arranges crude oil import control valve, be connected with on the pipeline between crude oil import control valve the Produced Liquid pipeline be conducted with it at crude oil work well head, and being provided with Produced Liquid control valve, this acidifying solution monitoring device can manipulate the keying of crude oil import control valve and Produced Liquid control valve;
On described Produced Liquid pipeline, series winding arranges pipe-line mixer, and the Produced Liquid pipeline of described pipe-line mixer front end arranges medicine system, this medicine system can to the agent of Produced Liquid Cemented filling acidification, and the Produced Liquid pipeline of pipe-line mixer rear end is communicated with petroleum pipeline;
Make the acidified liquid testing agency of Produced Liquid from active well, when detecting that the changing value of Produced Liquid acescency and/or electrical conductivity exceedes setting category, closing crude oil import control valve and opening Produced Liquid control valve, making Produced Liquid enter Produced Liquid pipeline;
Medicine system starts agent-feeding treatment according to acescency in detected Produced Liquid, makes acidification agent and Produced Liquid through metering jointly enter pipe-line mixer and mixed and react, Produced Liquid feeding petroleum pipeline after the process that pipe-line mixer is discharged.
2. method according to claim 1, wherein, when acidifying solution monitoring device detects that Produced Liquid pH value exceeds 6-8, namely its changing value exceedes setting category.
3. method according to claim 1, wherein, the composition of described acidification agent comprises: water-soluble demulsifier 10-20%, corrosion inhibiter 2-5%, auxiliary agent 1-4%, surplus are buffer.
4. method according to claim 3, wherein, the composition of described acidification agent comprises: water-soluble demulsifier 15%, corrosion inhibiter 3%, auxiliary agent 2%, buffer 80%.
5. method according to claim 1 and 2, wherein, when acidifying solution monitoring device detects that the changing value of Produced Liquid pH and electrical conductivity exceedes setting category, closes crude oil import control valve and opens Produced Liquid control valve, making Produced Liquid enter Produced Liquid pipeline.
6. method according to claim 1, wherein, described medicine system comprises acidifying solution checkout gear, itself and Produced Liquid pipeline communication, and be connected with the metering control module of medicine system, this metering control module is then connected with the metering-type dosing pump of medicine system, and the entrance point of this metering-type dosing pump is connected to for medicine container, and the port of export is then connected in the Produced Liquid pipeline of pipe-line mixer front end;
The acescency of the Produced Liquid that described metering control module detects according to described acidifying solution checkout gear, controls the acidification agent that described metering-type dosing pump provides required dosage in Produced Liquid pipeline.
7. the method according to claim 1 or 6, wherein, makes the acidification agent through measuring and Produced Liquid order enter more than two pipe-line mixers.
8., for realizing the system of acidifying solution on-line checkingi and processing method described in any one of claim 1-7, it is arranged between crude oil work well head and petroleum pipeline, and this system comprises:
The acidifying solution monitoring device be connected with petroleum pipeline and crude oil import control valve, be arranged at the pipeline between crude oil work well head and crude oil import control valve and the Produced Liquid pipeline be conducted with it, and being arranged at the ducted Produced Liquid control valve of this Produced Liquid, described acidifying solution monitoring device can manipulate the keying of crude oil import control valve and Produced Liquid control valve;
On described Produced Liquid pipeline, series winding is provided with pipe-line mixer, and the Produced Liquid pipeline of this pipe-line mixer front end is connected with medicine system connection, and the Produced Liquid pipeline of pipe-line mixer rear end is communicated with petroleum pipeline.
9. system according to claim 8, wherein, described acidifying solution monitoring device has control module and can detect the pH of the Produced Liquid flowed through and/or the detection module of conductivity variations, and, when described detection module detects that the pH of Produced Liquid and/or conductivity variations exceed setting category, described control module can control close crude oil import control valve and open Produced Liquid control valve.
10. system according to claim 8, wherein, described medicine system comprises acidifying solution checkout gear, itself and Produced Liquid pipeline communication, and be connected with the metering control module of medicine system, this metering control module is then connected with the metering-type dosing pump of medicine system, and the entrance point of this dosing pump is connected to for medicine container, and the port of export is then connected in the Produced Liquid pipeline of pipe-line mixer front end.
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Inventor after: Wu Luning Inventor after: Xu Hui Inventor after: Liu Na Inventor after: Shang Minghua Inventor after: Sun Guangling Inventor after: Yao Mingxiu Inventor after: Wen Bin Inventor after: Li Yi Inventor after: Li Qingfang Inventor after: Wang Tianli Inventor after: Yanbin Inventor after: Pang Huizhong Inventor after: Liu Hualei Inventor after: Sun Yuguo Inventor before: Wu Luning Inventor before: Sun Zhiying Inventor before: Liu Dongjie Inventor before: Zhao Zhongjie Inventor before: Li Qingfang Inventor before: Wang Tianli Inventor before: Huang Shaowei Inventor before: Liu Huiying Inventor before: Zhang Qiyang Inventor before: Sun Guangling Inventor before: Li Yi Inventor before: Pang Huizhong |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221201 Address after: 100027 Chaoyangmen North Street, Chaoyang District, Chaoyang District, Beijing Patentee after: SINOPEC Group Patentee after: SINOPEC OILFIELD SERVICE Corp. Patentee after: SINOPEC PETROLEUM ENGINEERING Corp. Address before: 257026 No. 49, Ji'nan Road, Dongying, Shandong Patentee before: SINOPEC PETROLEUM ENGINEERING Corp. |