CN111322034B - Recovery-free pipe cleaning body and pipe cleaning method - Google Patents
Recovery-free pipe cleaning body and pipe cleaning method Download PDFInfo
- Publication number
- CN111322034B CN111322034B CN202010088557.0A CN202010088557A CN111322034B CN 111322034 B CN111322034 B CN 111322034B CN 202010088557 A CN202010088557 A CN 202010088557A CN 111322034 B CN111322034 B CN 111322034B
- Authority
- CN
- China
- Prior art keywords
- layer
- cleaning
- wax
- crude oil
- paraffin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing, limiting or eliminating the deposition of paraffins or like substances
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/008—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using chemical heat generating means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
Abstract
The invention discloses a recovery-free pipe cleaning body and a pipe cleaning method, relates to the field of oil fields, and discloses a recovery-free pipe cleaning body, which comprises the following steps: a dissolution layer, and a filling layer having a support for the dissolution layer; the cleaning pipe body flows in the cleaning pipe of the wax-containing crude oil pipeline to clean and scrape dirt on the inner wall of the pipeline, when the dissolving layer is melted or dissolved, the dissolving layer and the filling layer are sequentially melted, and the cleaning pipe body is dissolved in a petroleum medium in the cleaning pipe of the wax-containing crude oil pipeline; wherein, the shape of the pigging body is the same as the internal shape of the paraffin-containing crude oil pipeline pigging. The problems that the ball losing phenomenon in the recycling process is serious, the pipeline paraffin removal and resistance reduction duration is short, and the ball losing has serious gathering and transportation potential safety hazards are solved.
Description
Technical Field
The invention relates to the field of oil fields, in particular to a recovery-free pipe cleaning body and a pipe cleaning method.
Background
In the process of exploiting an oil field and an ore field, underground produced liquid needs to be conveyed through a pipeline, and as the produced liquid is oil-water mixed liquid or pure oil, alkane components, namely paraffin, which form important components in crude oil can be reduced due to the gradient change of the environmental temperature of the pipeline, and the phenomenon of liquid/solid phase change and condensation, namely paraffin precipitation, is generated on the inner wall of the pipeline, so that the flowable space in the pipeline is greatly compressed. The wax deposition has great influence on normal production, which is directly reflected in that the inner diameter of the pipeline is thinned, the flow rate is reduced, and the conveying pressure is increased, if the pipeline is blocked due to untimely treatment, the conveying is stopped.
At present, a method of ball throwing and pipe cleaning is mostly adopted in most industries based on energy conservation and cost consideration to solve similar problems. The ball throwing and cleaning pipe is driven by pipeline conveying medium to move forward, the impact force generated by the leakage fluid around the cleaning pipe generates the functions of scouring, extruding and deforming the scaling matter and the stripping matter attached to the pipe wall, and the generated stirring force can suspend and disperse the cleaned matter and discharge the matter in the conveying medium.
The ball throwing and collecting process for oil field application mainly aims at wax deposition on the inner wall of the pipeline, selects proper rubber balls according to the inner diameter of the pipeline, uses a ball throwing device to throw the balls into the pipeline, pushes the rubber balls to run in the pipeline to play a wax hanging role through single well produced liquid, finally enters a manifold between valve banks, and recovers the rubber balls through a ball collecting device, thereby achieving the purpose of recycling rubber. The pigging body generally adopts corrosion-resistant chloroprene rubber to make, and chloroprene rubber ball has possessed advantages such as high tenacity, resistant oil, acid and alkali-resistance, ageing-resistant, high temperature resistance, but in the in-service use, because the complicated characteristic that oil-water mixture possesses leads to the application of balling pigging technology effect not ideal, main problematic includes:
1. once the rubber ball meets welding spot welding slag and the curve is blocked, the blocked rubber ball cannot be completely discharged even if reverse cleaning is carried out, the pipeline is completely blocked, and only the pipeline is cut to take out the blocked rubber ball;
2. the existing ball collecting process is extremely complicated and unreliable and is limited by different processes, the inner diameters of pipelines are different and change, the complete recovery of rubber balls cannot be guaranteed no matter a manual mode or automatic equipment is adopted, when the rubber ball cleaning is applied to a certain oil field energy production block in China on a large scale, the average recovery rate of the rubber balls is only about 30-40%, and the rest of the rubber balls are remained in a slow flow area with larger inner diameter in an oil pipeline and cannot be discharged. A large amount of residual rubber ball materials are soaked in the oil-containing mixed liquid for a long time, and finally can seriously swell, damage and even block devices such as pipelines, filters and the like, and threatens the safety of pump equipment;
3. the rubber cleaning tube body is used for recycling, but in actual use, the rubber ball body is soaked in the pipeline for too long time, so that the problems of expansion deformation, serious surface scratch, damage and the like exist in the rubber ball body, the completeness rate of the recycled rubber ball is low, and the recycling proportion is not high.
The automatic ball throwing and collecting process for cold conveying well includes selecting proper rubber ball based on the inner diameter of pipeline, throwing the rubber ball into oil returning pipeline with automatic ball throwing unit installed in well head, driving the rubber ball to run in the pipeline to form wax hanging effect via the single well liquid producing valve, and final returning the rubber ball to the collecting pipe between valve banks for reuse.
Through knowledge of the flow, several nodes that may contribute to the ball yield are determined:
(1) an automatic ball-throwing device;
(2) in the oil return pipeline;
(3) gathering pipes among the valve banks;
(4) automatic ball collecting device.
A lot of broken rubber ball pieces and damaged rubber balls are found in the recovered rubber balls, through the research on the process, only the electric valve has the capacity of cutting the rubber balls, when silt or other objects appear at the bottom of the electric valve, the rubber balls cannot fall into the electric valve completely, the electric valve rotates regularly to cut the rubber balls, and the cut rubber balls can be stopped in the manifold more easily or enter an oil transfer station through a filter screen of a ball collecting device.
Disclosure of Invention
In view of the above, the invention provides a recycling-free pipe cleaning body and a pipe cleaning method, so as to solve the problems of serious ball loss in a recycling process, short pipeline paraffin removal and resistance reduction duration time and serious potential safety hazards of ball loss in gathering and transportation.
In a first aspect, the present invention provides a recycling-free pipe cleaning body, comprising:
a dissolution layer, and a filling layer having a support for the dissolution layer;
the cleaning pipe body flows in the cleaning pipe of the wax-containing crude oil pipeline to clean and scrape dirt on the inner wall of the pipeline, when the dissolving layer is melted or dissolved, the dissolving layer and the filling layer are sequentially melted, and the cleaning pipe body is dissolved in a petroleum medium in the cleaning pipe of the wax-containing crude oil pipeline;
wherein, the shape of the pigging body is the same as the internal shape of the paraffin-containing crude oil pipeline pigging.
Preferably, exempt from to retrieve clear pipe body, still include:
a drug layer;
the outer side of the filling layer is the dissolution layer, the inner side of the filling layer is a medicament layer, and medicaments of the medicament layer can dissolve the filling layer and the dissolution layer and can clean dirt in the paraffin-containing crude oil pipeline;
wherein the agent is soluble in petroleum based media.
Preferably, the medicament comprises: toluene or xylene, isopropanol or ethylene glycol, oleic acid amide, surfactants, defoamers, silica, and water.
Preferably, exempt from to retrieve clear pipe body, still include:
a drug layer;
the outer side of the filling layer is the dissolution layer, the inner side of the filling layer is a medicament layer, and medicaments of the medicament layer are used for cleaning dirt in the paraffin-containing crude oil pipeline;
the medicament layer includes: the inner core layer is a heating agent;
the medicament is arranged on the outer side of the inner core layer, and the filling layer is arranged on the outer side of the medicament;
the filling layer is provided with a plurality of holes, one side of each hole is provided with the heating agent in the inner core layer, and the other side of each hole is provided with the inner side of the dissolving layer;
the temperature in the clear pipe of wax-bearing crude oil pipeline rises to when the melting temperature on dissolved layer the dissolved layer melting perhaps predetermine a plurality of through-holes, one side of a plurality of through-holes is the heating agent, the heating agent with the medium contact in the clear pipe of wax-bearing crude oil pipeline, the heating agent generates the heat and carries out gas expansion, will the medicament is released and is promoted clear pipe body is in the clear intraductal motion of wax-bearing crude oil pipeline increases the velocity of flow and the temperature of the clean dirt of medicament, in order to improve the clear pipe speed and clear hinder effect of wax-bearing crude oil pipeline.
Preferably, the heat generating agent includes: sodium hydroxide and aluminum.
Preferably, the dissolving layer is a phase change material layer or a solid outer protective layer; and/or the filling layer is a paraffin filling layer.
Preferably, the phase-change material layer is a phase-change wax protective layer; and/or the material of the solid outer protective layer, comprising: film-forming agents and sustained-release agents;
and/or the paraffin filling layer is formed by compressing paraffin and silicon dioxide, so that a gap exists in the paraffin filling layer.
Preferably, the phase-change wax protective layer is prepared by stirring and heating paraffin, even number of alkane paraffin and silicon dioxide.
In a second aspect, the present invention provides a method for cleaning a tube by external melting with time and temperature control, including that the recovery-free cleaning tube body is a time-limited temperature-control external melting type cleaning tube body, and the dissolution layer is a phase change material layer, including:
adjusting the temperature in the clear pipe of the wax-containing crude oil pipeline, and controlling whether the phase change material layer is molten or not;
the method for adjusting the temperature in the clear pipe of the wax-containing crude oil pipeline and controlling whether the phase change material layer is molten comprises the following steps:
when the temperature is lower than the melting temperature of the phase-change material layer, the phase-change material layer is not melted, and the cleaning pipe body flows in the cleaning pipe of the wax-containing crude oil pipeline to clean dirt on the inner wall of the pipeline;
after the pigging body reaches the preset position in the paraffin-containing crude oil pipeline pigging, the temperature rises to the melting temperature, the phase-change material layer melts, and the phase-change material layer and the filling layer melt in sequence.
In a third aspect, the present invention provides a method for cleaning a tube by self-melting a recovery-free tube body in a limited time, wherein the recovery-free tube body is a medicament-limited self-melting tube body, and the dissolution layer is a phase change material layer or a solid outer protection layer, including:
if the dissolving layer is a phase-change material layer, the specific cleaning method for the medicament time-limited self-melting comprises the following steps:
setting the temperature in the clear pipe of the wax-containing crude oil pipeline to be below the melting temperature of the phase change material layer;
the cleaning pipe body flows in the cleaning pipe of the wax-containing crude oil pipeline to clean dirt on the inner wall of the pipeline;
after the pipe cleaning body reaches a preset position in a wax-containing crude oil pipeline cleaning pipe, the medicament dissolves the filling layer, the phase change material layer and dirt in the wax-containing crude oil pipeline cleaning pipe;
if the dissolution layer is a solid outer protective layer, the specific time-limited self-melting tube cleaning method of the medicament is as follows:
the cleaning pipe body flows in the cleaning pipe of the wax-containing crude oil pipeline to clean dirt on the inner wall of the pipeline; the outer side of the solid outer protection layer is gradually dissolved in a medium in the paraffin-containing crude oil pipeline cleaning pipe, the medicament is sequentially dissolved in the filling layer and the inner side of the phase change material layer, and the medicament cleans dirt in the paraffin-containing crude oil pipeline cleaning pipe.
In a fourth aspect, the present invention provides a method for cleaning a tube with a timed thermochemical phase change, including that the recovery-free cleaning tube body is a timed thermochemical phase change cleaning tube body, the dissolution layer is a phase change material layer, and the chemical layer includes: inner nuclear layer and medicament, the inner nuclear layer is the heating agent, includes:
setting the temperature in the clear pipe of the wax-containing crude oil pipeline as the melting temperature of the phase change material layer;
determining a thickness of the phase change material layer;
determining the melting time of the phase-change material layer through the melting temperature and the thickness of the phase-change material layer;
the filling layer and the phase change material layer are in after the melting time is dissolved, the heating agent meets the fluid in the paraffin-containing crude oil pipeline cleaning pipe, the heating agent generates heat and expands gas, the medicament is pushed out, the cleaning pipe body is pushed to move in the paraffin-containing crude oil pipeline cleaning pipe, the flow speed and the temperature of the medicament cleaning dirt are increased, and the pipe cleaning speed and the cleaning resistance effect of the paraffin-containing crude oil pipeline are improved.
The invention has at least the following beneficial effects:
the invention provides a recycling-free pipe cleaning body and a pipe cleaning method, and aims to solve the problems of serious ball loss in a recycling process, short pipeline paraffin removal and resistance reduction duration and serious potential safety hazards of ball loss in gathering and transportation.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural view of a recycling-free pipe cleaning body according to an embodiment of the present invention;
FIG. 2 is a technical index diagram of a silica composite paraffin intermixing structure according to an embodiment of the present invention;
FIG. 3 is a graph illustrating hardness change requirements of a phase change material layer according to an embodiment of the present invention.
Detailed Description
The present invention will be described below based on examples, but it should be noted that the present invention is not limited to these examples. In the following detailed description of the present invention, certain specific details are set forth. However, the present invention may be fully understood by those skilled in the art for those parts not described in detail.
Furthermore, those skilled in the art will appreciate that the drawings are provided solely for the purposes of illustrating the invention, features and advantages thereof, and are not necessarily drawn to scale.
Also, unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, the meaning of "includes but is not limited to".
Fig. 1 is a schematic structural view of a recycling-free pipe cleaning body according to an embodiment of the present invention. As shown in fig. 1, a first recycling-free pigging body comprises: a dissolution layer, and a filling layer having a support for the dissolution layer; the cleaning pipe body flows in the cleaning pipe of the wax-containing crude oil pipeline to clean and scrape dirt on the inner wall of the pipeline, when the dissolving layer is melted or dissolved, the dissolving layer and the filling layer are sequentially melted, and the cleaning pipe body is dissolved in a petroleum medium in the cleaning pipe of the wax-containing crude oil pipeline; wherein, the shape of the pigging body is the same as the internal shape of the paraffin-containing crude oil pipeline pigging. The problems that the ball losing phenomenon in the recycling process is serious, the pipeline paraffin removal and resistance reduction duration is short, and the ball losing has serious gathering and transportation potential safety hazards are solved.
In the embodiment of the invention, the shape of the flowing cleaning and scraping pipeline in the clean pipe of the general wax-containing crude oil pipeline is circular, and the shape of the clean pipe body is spherical, in order to better understand the invention, in the following description, the invention is explained for the shape of the clean pipe body is spherical, that is, in the invention, the clean pipe body is not recycled and is made into solid balls with the same specification as the original rubber balls, the clean pipe body is directly put into the pipeline from a well mouth, after the clean pipe body finishes cleaning, the clean pipe body stays in a metering junction pipe or a ball collecting machine, and the clean pipe body is gradually dissolved in the produced liquid in a specified time period; the decomposed substances of the catheter body do not influence the gathering and transportation system.
However, the present invention is not limited to a specific shape of the pipe cleaning body. If the shape of the flowing cleaning pipeline in the wax-containing crude oil pipeline cleaning pipe is other shapes, the shape of the cleaning pipe body is the same as that of the flowing cleaning pipeline in the wax-containing crude oil pipeline cleaning pipe, so that the cleaning pipe body can flow in the wax-containing crude oil pipeline cleaning pipe to clean the dirt on the inner wall of the pipeline.
In the invention, the dissolving layer is a phase change material layer or a solid outer protective layer; and/or the filling layer is a paraffin filling layer 2.
Wherein, the material of the solid outer protective layer comprises: film-forming agents and sustained-release agents; the film forming agent and the slow release agent form a solid outer protective layer. The material of the solid outer protective layer further comprises: a filler, the filler comprising: clay + gypsum were not calcined. The film-forming agent, the slow-release agent and the filler (non-sintered clay and gypsum) form a solid external protective layer. The solid outer protective layer can be dissolved in a medium (water and oil) in the clear pipe of the wax-containing crude oil pipeline, the phase-change material layer can be melted at a certain melting temperature, and the detailed description of the phase-change material layer can be seen in the following.
At this time, if the dissolution layer is a phase-change material layer, the pigging body is a time-limited temperature-controlled external-melting pigging body, and the detailed description of the time-limited temperature-controlled external-melting pigging method can be seen in detail below.
At this time, if the dissolving layer is a solid outer protective layer, the solid outer protective layer can be dissolved in the medium (water and oil) in the clear pipe of the wax-containing crude oil pipeline, and therefore the pipeline cleaning agent has a good cleaning effect in a short distance pipeline.
In the present invention, the recycling-free pigging body of the second kind comprises: a dissolution layer, and a filling layer having a support for the dissolution layer; the cleaning pipe body flows in the cleaning pipe of the wax-containing crude oil pipeline to clean and scrape dirt on the inner wall of the pipeline, when the dissolving layer is melted or dissolved, the dissolving layer and the filling layer are sequentially melted, and the cleaning pipe body is dissolved in a petroleum medium in the cleaning pipe of the wax-containing crude oil pipeline; wherein, the shape of the pigging body is the same as the internal shape of the paraffin-containing crude oil pipeline pigging. Further comprising: a drug layer 3; the outer side of the filling layer is the dissolution layer, the inner side of the filling layer is a medicament layer 3, and medicaments of the medicament layer 3 can dissolve the filling layer and the dissolution layer and can clean dirt in the paraffin-containing crude oil pipeline; wherein the agent is soluble in petroleum based media.
At this time, the dissolving layer may be a phase change material layer or a solid outer protective layer; the tube cleaning body is a medicament time-limited self-melting tube cleaning body, and the detailed description of the medicament time-limited self-melting tube cleaning method can be seen in detail below.
In a medicament time-limited self-melting catheter body, the medicament comprising: toluene or xylene, isopropanol or ethylene glycol, oleic acid amide, surfactants, defoamers, silica, and water.
Specifically, the medicament adopts a quasi-water-based wax melting formula: 5-10% of toluene (or dimethylbenzene), 5-10% of isopropanol (or ethylene glycol), 3-5% of oleamide, 1-3% of surfactant, 1-2% of defoaming agent, 1-2% of silicon dioxide (SiO2) and 65-75% of water.
In the present invention, the third recycling-free pipe body comprises: a dissolution layer, and a filling layer having a support for the dissolution layer; the cleaning pipe body flows in the cleaning pipe of the wax-containing crude oil pipeline to clean and scrape dirt on the inner wall of the pipeline, when the dissolving layer is melted or dissolved, the dissolving layer and the filling layer are sequentially melted, and the cleaning pipe body is dissolved in a petroleum medium in the cleaning pipe of the wax-containing crude oil pipeline; wherein, the shape of the pigging body is the same as the internal shape of the paraffin-containing crude oil pipeline pigging. Further comprising: a drug layer 3; the outer side of the filling layer is the dissolution layer, the inner side of the filling layer is a medicament layer 3, and medicaments in the medicament layer 3 are used for cleaning dirt in the paraffin-containing crude oil pipeline; the agent layer 3 includes: the inner core layer is a heating agent; the medicament is arranged on the outer side of the inner core layer, and the filling layer is arranged on the outer side of the medicament; the filling layer is provided with a plurality of holes, one side of each hole is provided with the heating agent in the inner core layer, and the other side of each hole is provided with the inner side of the dissolving layer.
The temperature rise in the wax-bearing crude oil pipeline is to when the melting temperature of solution layer the melting of solution layer perhaps a plurality of through-holes are predetermine to the solution layer, one side of a plurality of through-holes is the heating agent, the heating agent with the medium contact in the wax-bearing crude oil pipeline is clear, the heating agent generates the heat and carries out gas expansion, will the medicament is released and is promoted the clear pipe body is in the motion in the wax-bearing crude oil pipeline is clear, increases the velocity of flow and the temperature of the clean dirt of medicament, in order to improve the clear pipe speed and clear hinder effect of wax-bearing crude oil pipeline.
At this time, if the dissolution layer is a phase-change material layer, the tube cleaning body is a timing thermochemical phase-change type tube cleaning body, and the detailed description of a tube cleaning method of time-limited self-melting of a medicament can be seen in detail below.
In an embodiment of the present invention, the heat generating agent includes: sodium hydroxide and aluminum.
If the dissolving layer is a solid outer protective layer, the improvement of the performance of the communicating pipe under the low temperature condition is considered by referring to relevant data of a chemical dredging agent of the pipeline and combining the condition of a pipeline conveying medium, and the manufacturing method is as follows:
solid sodium hydroxide particles and aluminum powder are compressed into a sphere to be used as an inner nuclear layer (a heating agent part) of the tube body; the middle medicament layer 3 is formed by wrapping the inner core layer with auxiliary materials of foaming agents, propping agents and cleaning agents; if the dissolving layer adopts a solid outer protective layer, the solid outer protective layer is made of film-forming agent, slow-release agent and filler (non-sintered clay and gypsum).
The reaction process time of the heating agent formed by sodium hydroxide and aluminum powder and water can be determined by controlling the quantity of raw material substances, and after the reaction is finished, residual substance residues are entrained into produced liquid to flow circularly, so that the safety of a gathering and transportation system is not influenced.
The film-forming agent and the slow-release agent used in the solid outer protective layer are respectively dissolved in the oil-water mixed liquid, and the shell formed by the clay and the gypsum filler gradually changes into a mud shape to be ablated and then is brought into the oil-water mixed liquid for circulation.
If the dissolving layer is a solid outer protective layer, the cleaning method of the pipe cleaning body comprises the following steps:
before the pipe cleaning body is put into the pipe cleaning machine, a plurality of through holes (a plurality of through holes) are punched on the degradation ball (the pipe cleaning body) according to the length of the pipeline, and the through holes can be prefabricated and molded in advance;
the degradation ball (cleaning pipe body) is put into the pitching machine at the well mouth, the water in the produced liquid immediately enters the degradation ball through the through holes (a plurality of through holes) to generate thermochemical reaction with the heating agent formed by the sodium hydroxide and the aluminum powder of the inner core layer, the heat and gas expansion phenomena are rapidly generated, and meanwhile, the agent (film forming agent and slow release agent) of the agent layer 3 is taken out of the ball, so that violent high-temperature hot bubbles are formed, the flowing speed and temperature of the pipeline are increased, and the speed and the resistance cleaning effect of normal ball throwing and pipe cleaning can be improved.
In the present invention and embodiments of the present invention, a phase change material is a material that absorbs or emits heat over a range of temperatures to achieve energy storage and controlled release. The phase change material is formed by dispersing the phase change material in a solid support material in small particles, and cannot be melted or deformed at a phase change temperature section, so that the stability of the shape is ensured. The phase change material particles absorb or release latent heat in the solid-liquid phase change process, so that the phase change material particles have large apparent specific heat in the phase change temperature section. The shaped phase change material is not easy to leak, is nontoxic, harmless and corrosion-free, and can be directly used without encapsulation. The melting temperature range of the 35# grade phase change energy storage wax is 32.5-37.5 ℃.
In the invention, the phase-change material layer is a phase-change wax protection layer 1; the phase-change material conventionally used for the purpose of energy conservation and heat preservation refers to a material which can absorb or emit heat within a certain temperature range, thereby achieving energy storage and controllable release. Different from the conventional phase-change wax material technology, the recycling-free phase-change wax ball protection layer 1 is required to have better sealing property and wear resistance and relatively lower thermal conductivity so as to prevent external media from prematurely invading the phase-change wax ball, and a certain ablation condition is required to be defined, so that a paraffin-based material (C16-27H 34-56) with a moderate melting point is adopted.
The temperature of the pipeline transmission applied to the ball-throwing pipe cleaning on site is generally between 10 ℃ and 42 ℃, while the solid-liquid melting point of the current commercial paraffin is mostly between 46 ℃ and 58 ℃, compared with the application of the ball-throwing pipe cleaning, the controllable temperature range is between 29 ℃ and 45 ℃, the hardness of the surface layer of the paraffin is required to be as compact as possible, meanwhile, the state is more stable as the phase-change soil moisture is higher, and the phase-change wax is prepared by adopting a paraffin intermixing mode, which is a scheme with lower cost.
In the invention, the phase-change wax protective layer 1 is prepared by stirring and heating paraffin, alkane wax with even number and silicon dioxide. Specifically, the material constituting the phase change wax protective layer 1 of the tube cleaning body is prepared by adding alkane wax components with different even numbers such as 16 alkanes, 18 alkanes, 20 alkanes and 22 alkanes and the like in different proportions and 1-3% of silica filler into commodity paraffin with fixed marks such as 42-48 and the like as a base, and preparing a silica composite paraffin organic phase change material with different phase change temperatures of 16-48 ℃ by adopting a stirring and heating method, wherein the material has the characteristics of stable phase change temperature and low heat conduction, the latent heat of phase change is not lower than 240kj/kg under the general condition, the penetration degree is superior to that of common paraffin, the material is suitable for being used as a surface layer protective material of a phase change wax ball (tube cleaning body), and the values of relevant characteristic curves are shown in figure 2.
The phase-change wax material is used as a protective layer of a recovery-free phase-change wax ball (pipe cleaning body), solid-liquid phase-change conversion process conditions are defined by setting indexes such as phase-change temperature, phase-change moisture, thickness of the protective layer and the like, and the solid state of the wax ball can be maintained unchanged for a certain period of time under the condition that the pipeline temperature is lower than the phase-change value of the pipe cleaning body and is relatively constant or reduced, so that the stability of the shape is ensured. And the medium temperature in the pipeline conveying process is a process of continuously reducing, the phase change value is determined according to the upper limit of the temperature of the initial ball throwing point before secondary heating, and the wax ball is not melted before entering the slow flow section or the system does not have a secondary temperature raising and heating measure.
In the embodiment of the invention, the filling layer mainly serves as a support body of the phase-change wax ball (cleaning tube body), and the paraffin filling layer 2 is formed by compressing paraffin and silicon dioxide, so that a gap exists in the paraffin filling layer.
Specifically, the paraffin filling layer 2 is formed by stirring and mixing 42-58# granular paraffin, powdered paraffin, chlorinated paraffin and a small amount of silicon dioxide material and then compressing, and the components are in proportion: 65-75% of No. 42-58 granular paraffin; 10-15% of No. 42-58 powdered paraffin; 5-10% of No. 40-55 liquid chlorinated paraffin; 5-10% of silicon dioxide (SiO 2); it should be noted that the filling layer is formed by compression rather than melting and cooling, in order to have a large number of voids inside the material, so that chemical agents can permeate the inside thereof with temperature changes.
The phase-change wax ball (pipe cleaning body) can be divided into the following three types or pipe cleaning methods according to the working mode.
The invention provides a time-limited temperature-controlled external-melting pigging method, which comprises the following steps that the recovery-free pigging body is a time-limited temperature-controlled external-melting pigging body, a dissolving layer is a phase change material layer, and the method comprises the following steps:
adjusting the temperature in the clear pipe of the wax-containing crude oil pipeline, and controlling whether the phase change material layer is molten or not; the method for adjusting the temperature in the clear pipe of the wax-containing crude oil pipeline and controlling whether the phase change material layer is molten comprises the following steps: when the temperature is lower than the melting temperature of the phase-change material layer, the phase-change material layer is not melted, and the cleaning pipe body flows in the cleaning pipe of the wax-containing crude oil pipeline to clean dirt on the inner wall of the pipeline; after the pigging body reaches the preset position in the paraffin-containing crude oil pipeline pigging, the temperature rises to the melting temperature, the phase-change material layer melts, and the phase-change material layer and the filling layer melt in sequence.
In particular to a time-limited temperature-controlled external-melting type pigging body used in a time-limited temperature-controlled external-melting pigging method; there are phase transition wax outer protective layer 1 and thicker filling layer, no medicament layer 3, and the pipeline that is suitable for temperature, pressure relatively higher uses, drops into the end of serve in appointed ambient temperature scope, scrapes the protruding wax crystal structure of pipeline inner wall clearly, is detained after reaching predetermined slow flow region, melts with the oil water medium after satisfying outer phase transition temperature condition through pipeline or container heating.
The preparation method of the time-limited temperature-controlled external-melting phase-change wax ball (pipe cleaning body) comprises the following steps:
1. granular paraffin, powdered paraffin, chlorinated paraffin and a small amount of silicon dioxide are used as materials of the filling layer, and are placed on a die of a press machine after being stirred and mixed according to a proportion, and are compressed into a sphere (filling paraffin sphere) under proper pressure;
2. after phase change wax with corresponding indexes is heated and melted by a heating kettle, quickly immersing the filled paraffin ball into wax liquid and taking out, and moving the filled paraffin ball into cold water for cooling, wherein if the thickness is not enough, the repeated wax immersion liquid is thickened after the water on the surface area of the ball body is removed;
3. the finished tube cleaning body needs to be stored in a low-temperature refrigeration mode.
Second, the present invention provides a method for cleaning a tube by time-limited chemical self-melting, wherein the recovery-free cleaning tube body is a chemical time-limited self-melting cleaning tube body which is a timed thermochemical phase change cleaning tube body, and the dissolution layer is a phase change material layer or a solid outer protection layer, the method comprising:
if the dissolving layer is a phase-change material layer, the specific cleaning method for the medicament time-limited self-melting comprises the following steps:
setting the temperature in the clear pipe of the wax-containing crude oil pipeline to be below the melting temperature of the phase change material layer; the cleaning pipe body flows in the cleaning pipe of the wax-containing crude oil pipeline to clean dirt on the inner wall of the pipeline; after the pipe cleaning body reaches a preset position in a wax-containing crude oil pipeline cleaning pipe, the medicament dissolves the filling layer, the phase change material layer and dirt in the wax-containing crude oil pipeline cleaning pipe in sequence;
if the dissolution layer is a solid outer protective layer, the specific time-limited self-melting tube cleaning method of the medicament is as follows:
the cleaning pipe body flows in the cleaning pipe of the wax-containing crude oil pipeline to clean dirt on the inner wall of the pipeline; the outer side of the solid outer protection layer is gradually dissolved in a medium in the paraffin-containing crude oil pipeline cleaning pipe, the medicament is sequentially dissolved in the filling layer and the inner side of the phase change material layer, and the medicament cleans dirt in the paraffin-containing crude oil pipeline cleaning pipe.
In particular to a medicament time-limited self-melting type tube cleaning body used in a medicament time-limited self-melting tube cleaning method; medicament time-limited self-melting pigging body, comprising: phase transition wax outer protective layer 1 and filling layer to and liquid medicament layer 3 based on water base or oil base paraffin removal agent, be suitable for whole section temperature, the pressure is relatively moderate pipeline and use, drop into the end of sending out in appointed ambient temperature scope, clear scrape the protruding wax crystal structure of pipeline inner wall, the device district that reaches behind the predetermined slow flow region or can't handle is detained, through the wax melting medicament release effect of self carrying, dissolve the filling layer in advance, reach whole breakage and melt with the oil water medium under the fluidic effect at last.
The medicament layer is more important for the phase-change wax ball (catheter cleaning body) of the medicament time-limited self-melting type, and the purpose of the medicament layer is to melt the filling layer from the inside under a proper condition, so that the phase-change wax ball (catheter cleaning body) is finally broken and melted. The medicament adopts a quasi-water-based wax melting formula: 5-10% of toluene (or dimethylbenzene); 5-10% of isopropanol (or ethylene glycol); 3-5% of oleamide; 1-3% of a surfactant; 1-2% of defoaming agent; 1-2% of silicon dioxide (SiO 2); 65-75% of water.
The preparation method of the medicament time-limited self-melting phase-change wax ball (clearing pipe body) comprises the following steps:
1. mixing the raw materials at normal temperature, fully stirring, placing into a rubber spherical mold, and quickly freezing at a temperature below-18 ℃ to obtain a spherical ice;
2. placing the medicament ice ball in the middle, taking granular paraffin, powdered paraffin, chlorinated paraffin and a small amount of silicon dioxide as materials of a filling layer at the periphery, stirring, mixing and wrapping the medicament ice ball at the outer side according to a proportion, placing the medicament ice ball on a mould of a press machine, and compressing the medicament ice ball into a ball shape (filling paraffin ball) under proper pressure;
3. after phase change wax with corresponding indexes is heated and melted by a heating kettle, quickly immersing the filled paraffin ball into wax liquid and taking out, and moving the filled paraffin ball into cold water for cooling, wherein if the thickness is not enough, the repeated wax immersion liquid is thickened after the water on the surface area of the ball body is removed;
4. hermetically refrigerating at 2-6 deg.C; can ensure the stability of the wax melting agent and the filling layer in 1-2 months.
Thirdly, the present invention provides a timing thermochemical phase change tube cleaning method, including the above recovery-free tube cleaning body, where the dissolution layer is a phase change material layer, and the chemical agent layer 3 includes: the inner core layer is a heating agent, and the method comprises the following steps:
setting the temperature in the clear pipe of the wax-containing crude oil pipeline as the melting temperature of the phase change material layer; determining a thickness of the phase change material layer; determining the melting time of the phase-change material layer through the melting temperature and the thickness of the phase-change material layer;
the filling layer and the phase change material layer are in after the melting time is dissolved, the heating agent meets the fluid in the paraffin-containing crude oil pipeline cleaning pipe, the heating agent generates heat and expands gas, the medicament is pushed out, the cleaning pipe body is pushed to move in the paraffin-containing crude oil pipeline cleaning pipe, the flow speed and the temperature of the medicament cleaning dirt are increased, and the pipe cleaning speed and the cleaning resistance effect of the paraffin-containing crude oil pipeline are improved.
Specifically, a timing thermochemical phase change pipe cleaning method uses a timing thermochemical phase change pipe cleaning body; timing thermochemical phase change pipe body includes: the phase-change wax injection comprises an outer phase-change wax protection layer 1 and a filling layer for enlarging gaps, solid sodium hydroxide particles, aluminum powder and auxiliary materials are compressed into a spherical shape to be used as an inner core layer of a medicament layer 3, the thickness of a phase-change thermometer for the outer phase-change wax is controlled to determine the thickness, and the phase-change wax injection is suitable for pipeline injection with large flow resistance and more bent ways. The outer protective layer of the shell phase-change wax is scratched or melted by delaying after the ball is thrown into a specified melting temperature range and is stuck to a bottleneck position when encountering a blockage, water in a pipeline circulating medium permeates into a filling layer with enlarged gaps and is contacted with a medicament core, and sodium hydroxide particles and aluminum powder are subjected to a violent thermochemical reaction to release a large amount of bubbles and heat and push a ball to rotate and spray a thermal reactant, so that the purpose of expanding and cleaning the bottleneck node position is achieved, the flowing speed and the temperature of the pipeline are increased, the speed of normal ball throwing and pipe cleaning and the blockage cleaning effect can be improved, and chemical reaction residues are taken away by the medium under the action of fluid.
The preparation method of the timing thermochemical phase change wax ball (cleaning pipe body) comprises the following steps:
1. mixing 65-70% of strong oxidant sodium hydroxide powder and 30-35% of exothermic agent pure aluminum powder, and compressing into sphere (medicament sphere) with press and mould
2. Placing the medicinal ball in the middle, mixing and wrapping with granular paraffin, powdered paraffin, chlorinated paraffin and small amount of silicon dioxide filling layer material at certain ratio, placing on a press mold, and compressing into ball (filling paraffin ball) under appropriate pressure
3. After phase change wax with corresponding indexes is heated and melted by a heating kettle, quickly immersing the filled paraffin ball into wax liquid and taking out, and moving the filled paraffin ball into cold water for cooling, wherein if the thickness is not enough, the repeated wax immersion liquid is thickened after the water on the surface area of the ball body is removed;
4. and (4) storing in a closed waterproof environment at the temperature lower than the phase change temperature.
Punching a plurality of micropores in the paraffin sphere according to the requirement; it should be noted that the compressed density of the filling layer should not be too high, and it is suitable to penetrate through some micropores, so as to facilitate the water to enter at a suitable time, but once the water enters the medicament layer, the thermochemical reaction thereof starts to accelerate and cannot be terminated, and the paraffin filling layer 2 is melted off quickly. Some residue exists in the reaction process of the two, and deposition can occur if the flow rate of the pipeline medium is too low.
In the embodiment of the invention, the characteristic of heat storage of paraffin is utilized, the special paraffin ball (cleaning pipe body) is processed, the special paraffin ball (cleaning pipe body) is frozen for a period of time before being thrown into a pipeline, and after the pipeline is thrown into the pipeline to complete the pipe cleaning work, the paraffin ball is dissolved and extracted liquid at a collecting pipe section.
The phase-change wax ball (clear pipe body) exists in an oil-water mixed liquid below 30 ℃, a critical value (melting temperature) is appointed within the range of 25-35 ℃, the liquid is liquefied (melted when the melting temperature is reached) when the temperature is exceeded, and the liquid is in a solid state when the temperature is lower than the critical value (melting temperature);
the phase change heat absorption under solid state is minimum, high heat absorption value is not required, a small amount of common paraffin solidified shell (phase change material layer) can be added on the surface layer of the phase change wax ball (cleaning tube body) if the hardness is not enough, and the hardness change requirement curve is shown in figure 3.
FIG. 3 is a graph illustrating hardness change requirements of a phase change material layer according to an embodiment of the present invention. As shown in fig. 3, the hardness of the critical value substantially varies within a range of plus or minus 2 degrees celsius, the hardness stabilization time is greater than 1-6 hours at a stage of 25-28 degrees celsius, the complete ablation time is less than 1-2 hours at a temperature exceeding the critical value of 30 degrees celsius, and the phase-change wax ball (cleaning tube body) can be dissolved in petroleum medium.
Therefore, aiming at the technical current situation, the invention provides a recycling-free ball-throwing pipe-cleaning method, which replaces a recycled rubber pipe-cleaning body with disposable balls based on phase-changeable paraffin materials, cancels a rubber ball recycling link and improves the operation efficiency.
According to the characteristic that the produced liquid in the well is waxed on the inner wall of a conveying pipeline, a chemical synthetic substance soluble in water or oil is added with a slow release measure to prepare a solid ball with the same specification as the original rubber ball, the solid ball is directly put into the pipeline from a well mouth, after the pipe cleaning operation is finished, the phase-change wax ball (pipe cleaning body) stays in the pipeline of the next stage of slow flow, and the phase-change wax ball (pipe cleaning body) is subjected to phase change and is gradually dissolved in petroleum phase components of the produced liquid by virtue of a medicament of the phase-change wax ball or a delay regulation and control function of external temperature within a certain time; the decomposed substance of the phase-change wax ball (cleaning tube body) does not influence the gathering and transportation system.
In the operation of actual paraffin removal bowling (pipe cleaning body), because the wax precipitation degree of the inner wall of the pipeline is different, the cleaning effect is not guaranteed to be consistent after the phase change paraffin ball is thrown into the pipeline, and the pipe cleaning effect is guaranteed by adopting the reducing continuous bowling measures: namely, at least 3 balls (pipe cleaning bodies) are thrown according to each group, and the diameters of 3 phase-change wax balls (pipe cleaning bodies) in each group are processed according to the standards of 60 percent, 80 percent and 95 percent of the inner diameter of the pipeline respectively; when the ball is thrown (pipe cleaning body), 3 phase change wax balls (pipe cleaning body) are thrown into the pipeline at intervals in sequence from small to big.
Compared with the traditional rubber spherical pig pitching process, the recycling-free phase-change wax pigging (pigging body) pitching process has stronger practical significance especially in pipeline pitching construction with the inner diameter less than 100mm, and has wide application prospect.
The above-mentioned embodiments are merely embodiments for expressing the invention, and the description is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, various changes, substitutions of equivalents, improvements and the like can be made without departing from the spirit of the invention, and these are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (20)
1. The utility model provides a exempt from to retrieve clear body which characterized in that includes:
a dissolution layer, and a filling layer having a support for the dissolution layer;
the cleaning pipe body flows in the cleaning pipe of the wax-bearing crude oil pipeline to clean and scrape dirt on the inner wall of the pipeline, the filling layer is melted after the dissolution layer is melted or dissolved, and the cleaning pipe body is dissolved in the petroleum medium in the cleaning pipe of the wax-bearing crude oil pipeline;
wherein the shape of the pigging body is the same as the inner shape of the pigging of the wax-containing crude oil pipeline;
exempt from to retrieve clear body, still include: a drug layer (3);
the outer side of the filling layer is the dissolution layer, the inner side of the filling layer is a medicament layer (3), and medicaments of the medicament layer (3) are used for cleaning dirt in the paraffin-containing crude oil pipeline;
the agent layer (3) includes: the inner core layer is a heating agent;
the medicament is arranged on the outer side of the inner core layer, and the filling layer is arranged on the outer side of the medicament;
when the temperature in the clear pipe of the waxy crude oil pipeline rises to the melting temperature of the dissolving layer, the dissolving layer is melted, the heating agent is contacted with a medium in the clear pipe of the waxy crude oil pipeline, the heating agent generates heat to carry out gas expansion, and the heating agent pushes out the medicament and pushes the clear pipe body to move in the clear pipe of the waxy crude oil pipeline;
or the like, or, alternatively,
the filling layer is provided with a plurality of holes, one side of each hole is provided with the heating agent, and the other side of each hole is the inner side of the dissolving layer;
a plurality of through holes are preset in the dissolving layer, and the heating agent is arranged on one side of each through hole;
the heating agent is in contact with a medium in the clear pipe of the wax-containing crude oil pipeline, the heating agent generates heat to perform gas expansion, and the heating agent pushes out the medicament and pushes the clear pipe body to move in the clear pipe of the wax-containing crude oil pipeline.
2. The recycling-free cleaning pipe body as claimed in claim 1, wherein the dissolving layer is a phase-change material layer; and/or the filling layer is a paraffin filling layer (2).
3. -a recovery-free pipe body according to claim 2, wherein the phase-change material layer is a phase-change wax protective layer (1);
and/or the presence of a gas in the interior of the container,
the paraffin filling layer (2) is formed by compressing paraffin and silicon dioxide, and a gap is formed in the paraffin filling layer.
4. The recycling-free pipe body according to claim 3, wherein the phase-change wax protective layer (1) is prepared by stirring and heating paraffin, an even number of paraffin waxes and silica.
5. A timed thermochemical phase change pigging method comprising a recycling-free pigging body according to any of claims 1 to 4, said dissolved layer being a layer of phase change material, comprising:
setting the temperature in the clear pipe of the wax-containing crude oil pipeline as the melting temperature of the phase change material layer;
determining a thickness of the phase change material layer;
determining the melting time of the phase-change material layer through the melting temperature and the thickness of the phase-change material layer;
the filling layer and the phase change material layer are in after the melting time is dissolved, the heating agent meets the fluid in the paraffin-containing crude oil pipeline cleaning pipe, the heating agent generates heat and expands gas, the medicament is pushed out, the cleaning pipe body is pushed to move in the paraffin-containing crude oil pipeline cleaning pipe, the flow speed and the temperature of the medicament cleaning dirt are increased, and the pipe cleaning speed and the cleaning resistance effect of the paraffin-containing crude oil pipeline are improved.
6. A method for clearing a tube by medicament time-limited self-melting is characterized by comprising the following steps: the recycling-free cleaning pipe body is a medicament time-limited self-melting cleaning pipe body, a dissolving layer and a filling layer supporting the dissolving layer;
the cleaning pipe body flows in the cleaning pipe of the wax-bearing crude oil pipeline to clean and scrape dirt on the inner wall of the pipeline, the filling layer is melted after the dissolution layer is melted or dissolved, and the cleaning pipe body is dissolved in the petroleum medium in the cleaning pipe of the wax-bearing crude oil pipeline;
wherein the shape of the pigging body is the same as the inner shape of the pigging of the wax-containing crude oil pipeline;
the dissolving layer is a phase change material layer or a solid outer protective layer; exempt from to retrieve clear body, still include:
a drug layer (3);
the outer side of the filling layer is the dissolution layer, the inner side of the filling layer is a medicament layer (3), and medicaments of the medicament layer (3) can dissolve the filling layer and the dissolution layer and can clean dirt in the paraffin-containing crude oil pipeline;
wherein the agent is soluble in petroleum based media; the dissolving layer is a phase change material layer or a solid outer protective layer;
if the dissolving layer is a phase-change material layer, the specific cleaning method for the medicament time-limited self-melting comprises the following steps:
setting the temperature in the clear pipe of the wax-containing crude oil pipeline to be below the melting temperature of the phase change material layer;
the cleaning pipe body flows in the cleaning pipe of the wax-containing crude oil pipeline to clean dirt on the inner wall of the pipeline;
after the pipe cleaning body reaches a preset position in a wax-containing crude oil pipeline cleaning pipe, the filling layer and the phase change material layer are sequentially dissolved by the medicament, and the medicament cleans dirt in the wax-containing crude oil pipeline cleaning pipe;
if the dissolution layer is a solid outer protective layer, the specific time-limited self-melting tube cleaning method of the medicament is as follows:
the cleaning pipe body flows in the cleaning pipe of the wax-containing crude oil pipeline to clean dirt on the inner wall of the pipeline; the outer side of the solid outer protection layer is gradually dissolved in a medium in the paraffin-containing crude oil pipeline cleaning pipe, the medicament is sequentially dissolved in the filling layer and the inner side of the phase change material layer, and the medicament cleans dirt in the paraffin-containing crude oil pipeline cleaning pipe.
7. A method for time-limited self-thawing extubation according to claim 6, wherein said agent comprises: toluene or xylene, isopropanol or ethylene glycol, oleic acid amide, surfactants, defoamers, silica, and water.
8. A method for time-limited self-fluxing pharmaceutical dosage form according to any of claims 6 to 7, wherein said filling layer is a paraffin filling layer (2).
9. The method for cleaning tubes by time-limited self-melting of drugs according to claim 8, wherein the paraffin-filled layer (2) is formed by compression molding of paraffin and silica, and has voids inside.
10. A method for cleaning a tube by time-limited self-melting medicament according to any one of claims 6-7, wherein the phase-change material layer is a phase-change wax protective layer (1); and/or, the material of the solid outer protective layer comprises: film forming agent and slow release agent.
11. The method for cleaning the pipe by self-melting the medicament time limit according to claim 9, wherein the phase-change material layer is a phase-change wax protective layer (1); and/or, the material of the solid outer protective layer comprises: film forming agent and slow release agent.
12. The method for cleaning the pipe by self-melting in a time-limited manner according to claim 10, wherein the phase-change wax protective layer (1) is prepared by stirring and heating paraffin, an even number of paraffin and silica.
13. The method for cleaning a pipe by self-melting in a time-limited manner according to claim 11, wherein the phase-change wax protective layer (1) is prepared by stirring and heating paraffin, an even number of paraffin and silica.
14. A pigging method for time-limited temperature-controlled external melting is characterized by comprising the following steps: exempt from to retrieve clear pipe body, exempt from to retrieve clear pipe body includes: a dissolution layer, and a filling layer having a support for the dissolution layer;
the cleaning pipe body flows in the cleaning pipe of the wax-bearing crude oil pipeline to clean and scrape dirt on the inner wall of the pipeline, the filling layer is melted after the dissolution layer is melted or dissolved, and the cleaning pipe body is dissolved in the petroleum medium in the cleaning pipe of the wax-bearing crude oil pipeline;
the shape of the pigging body is the same as the internal shape of the pigging body of the wax-containing crude oil pipeline, and the dissolving layer is a phase change material layer;
adjusting the temperature in the clear pipe of the wax-containing crude oil pipeline, and controlling whether the phase change material layer is molten or not;
the method for adjusting the temperature in the clear pipe of the wax-containing crude oil pipeline and controlling whether the phase change material layer is molten comprises the following steps:
when the temperature is lower than the melting temperature of the phase-change material layer, the phase-change material layer is not melted, and the cleaning pipe body flows in the cleaning pipe of the wax-containing crude oil pipeline to clean dirt on the inner wall of the pipeline;
after the pigging body reaches the preset position in the paraffin-containing crude oil pipeline pigging, the temperature rises to the melting temperature, the phase-change material layer melts, and the phase-change material layer and the filling layer melt in sequence.
15. The method for clearing pipes by time-limited temperature-controlled external melting according to claim 14, wherein the dissolving layer is a phase-change material layer or a solid external protective layer; and/or the filling layer is a paraffin filling layer (2).
16. The pipe cleaning method with time-limited temperature-controlled external melting according to claim 15, characterized in that the phase-change material layer is a phase-change wax protective layer (1); and/or the material of the solid outer protective layer, comprising: film-forming agents and sustained-release agents;
and/or the paraffin filling layer (2) is formed by compressing paraffin and silicon dioxide, so that a gap exists in the paraffin filling layer.
17. The method for cleaning the pipe by external melting with time and temperature limited according to claim 16, wherein the phase-change wax protective layer (1) is prepared by stirring and heating paraffin, even paraffin and silica.
18. The method for clearing pipe with time-limited temperature-controlled external melting according to claim 15, further comprising:
a drug layer (3);
the outer side of the filling layer is the dissolution layer, the inner side of the filling layer is a medicament layer (3), and medicaments of the medicament layer (3) can dissolve the filling layer and the dissolution layer and can clean dirt in the paraffin-containing crude oil pipeline;
wherein the agent is soluble in petroleum based media.
19. The method for pigging by external fusion with time and temperature control according to claim 18, wherein the medicament comprises: toluene or xylene, isopropanol or ethylene glycol, oleic acid amide, surfactants, defoamers, silica, and water.
20. The method for clearing pipe with time-limited temperature-controlled external melting according to claim 15, further comprising:
a drug layer (3);
the outer side of the filling layer is the dissolution layer, the inner side of the filling layer is a medicament layer (3), and medicaments of the medicament layer (3) are used for cleaning dirt in the paraffin-containing crude oil pipeline;
the agent layer (3) includes: the inner core layer is a heating agent;
the medicament is arranged on the outer side of the inner core layer, and the filling layer is arranged on the outer side of the medicament;
the filling layer is provided with a plurality of holes, one side of each hole is provided with the heating agent in the inner core layer, and the other side of each hole is provided with the inner side of the dissolving layer;
the temperature rise in the wax-bearing crude oil pipeline is to when the melting temperature of solution layer the melting of solution layer perhaps a plurality of through-holes are predetermine to the solution layer, one side of a plurality of through-holes is the heating agent, the heating agent with the medium contact in the wax-bearing crude oil pipeline is clear, the heating agent generates the heat and carries out gas expansion, will the medicament is released and is promoted the clear pipe body is in the motion in the wax-bearing crude oil pipeline is clear, increases the velocity of flow and the temperature of the clean dirt of medicament, in order to improve the clear pipe speed and clear hinder effect of wax-bearing crude oil pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010088557.0A CN111322034B (en) | 2020-02-12 | 2020-02-12 | Recovery-free pipe cleaning body and pipe cleaning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010088557.0A CN111322034B (en) | 2020-02-12 | 2020-02-12 | Recovery-free pipe cleaning body and pipe cleaning method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111322034A CN111322034A (en) | 2020-06-23 |
| CN111322034B true CN111322034B (en) | 2022-03-08 |
Family
ID=71167954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010088557.0A Active CN111322034B (en) | 2020-02-12 | 2020-02-12 | Recovery-free pipe cleaning body and pipe cleaning method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111322034B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2122628C1 (en) * | 1997-06-20 | 1998-11-27 | Беляев Юрий Александрович | Device for removal of asphaltene-resin-wax and/or wax-hydrate deposits |
| CN101353955A (en) * | 2008-08-20 | 2009-01-28 | 王宗廷 | Method for manufacturing chemical paraffin cleaner |
| CN201535152U (en) * | 2009-10-29 | 2010-07-28 | 新疆新易通石油科技有限公司 | Tube-type chemical paraffin removal and prevention device |
| CN102250604A (en) * | 2011-05-27 | 2011-11-23 | 门正国 | Controlled releasing microcapsule for scale prevention, wax prevention or viscosity reduction of oil well |
| CN202214323U (en) * | 2011-05-27 | 2012-05-09 | 门正国 | Slow-release microcapsule for scale prevention, wax prevention or adhesion reduction for oil well |
| CN104963655A (en) * | 2015-06-16 | 2015-10-07 | 中国石油天然气股份有限公司 | Subsection releasing downhole tool with thermodynamics partition boards |
| CN109868127A (en) * | 2019-03-13 | 2019-06-11 | 西安石油大学 | A kind of inline type paraffin removing with chemical method ball and its preparation method and application |
| CN109926407A (en) * | 2019-03-13 | 2019-06-25 | 西安石油大学 | A kind of non-recycled type paraffin removing with chemical method ball and its preparation method and application |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0663510B1 (en) * | 1989-04-03 | 2004-11-17 | Exxonmobil Oil Corporation | Sulfate scale dissolution |
| FR2658559B1 (en) * | 1990-02-22 | 1992-06-12 | Pierre Ungemach | DEVICE FOR INJECTING INTO A WELL OF CORROSION OR DEPOSITION INHIBITORS USING AN AUXILIARY INJECTION TUBE. |
| CN102994061B (en) * | 2012-12-19 | 2015-01-14 | 克拉玛依新科澳石油天然气技术股份有限公司 | Wax cleaning agent for hot water dispensing deep well high-pour point wax |
| CN105441051B (en) * | 2014-08-28 | 2019-02-15 | 中国石油天然气股份有限公司 | A kind of solubility antiscale wax control ball |
-
2020
- 2020-02-12 CN CN202010088557.0A patent/CN111322034B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2122628C1 (en) * | 1997-06-20 | 1998-11-27 | Беляев Юрий Александрович | Device for removal of asphaltene-resin-wax and/or wax-hydrate deposits |
| CN101353955A (en) * | 2008-08-20 | 2009-01-28 | 王宗廷 | Method for manufacturing chemical paraffin cleaner |
| CN201535152U (en) * | 2009-10-29 | 2010-07-28 | 新疆新易通石油科技有限公司 | Tube-type chemical paraffin removal and prevention device |
| CN102250604A (en) * | 2011-05-27 | 2011-11-23 | 门正国 | Controlled releasing microcapsule for scale prevention, wax prevention or viscosity reduction of oil well |
| CN202214323U (en) * | 2011-05-27 | 2012-05-09 | 门正国 | Slow-release microcapsule for scale prevention, wax prevention or adhesion reduction for oil well |
| CN104963655A (en) * | 2015-06-16 | 2015-10-07 | 中国石油天然气股份有限公司 | Subsection releasing downhole tool with thermodynamics partition boards |
| CN109868127A (en) * | 2019-03-13 | 2019-06-11 | 西安石油大学 | A kind of inline type paraffin removing with chemical method ball and its preparation method and application |
| CN109926407A (en) * | 2019-03-13 | 2019-06-25 | 西安石油大学 | A kind of non-recycled type paraffin removing with chemical method ball and its preparation method and application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111322034A (en) | 2020-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mori et al. | Characterization of gas hydrate formation in direct-contact cool storage process | |
| CN102587865B (en) | Foam drainage gas recovery method for natural gas horizontal well | |
| CN111322034B (en) | Recovery-free pipe cleaning body and pipe cleaning method | |
| JP3742871B2 (en) | Manufacturing method of heat storage body | |
| CN107110614A (en) | Pass through the refrigeration or heat energy energy storage system of phase-change material | |
| CN100485250C (en) | Method for restraining gas hydrate in natural gas pipe line and device thereof | |
| OA13298A (en) | Thermal insulation gel with controlled crosslinking for petroleum hydrocarbon transmission lines. | |
| CN2915832Y (en) | Hot medium refluent heating type unloading arm | |
| CN107312321B (en) | A kind of TPU composite phase-change energy storage material of foaming and preparation method thereof | |
| CN112280550A (en) | Self-foaming pipe cleaning drainage ball for gathering pipeline and preparation method thereof | |
| CN201239988Y (en) | Energy storage type bubble generating means | |
| CN214937213U (en) | Novel oil field paraffin removal and dissolution ball | |
| CN202032802U (en) | Fluid ice preparation device | |
| CN203976660U (en) | A kind of without stirring and emulsifying detonator loading machine hopper | |
| JP2014512943A (en) | Gas hydrate continuous production method | |
| CN207260980U (en) | The gas hydrates cord coring drill of alcohol and liquid nitrogen hybrid refrigeration | |
| CN207439223U (en) | A kind of bottom release type solid-liquid phase change gravity assisted heat pipe | |
| CN201945111U (en) | Continuous binary ice refrigerator | |
| CN113124254A (en) | Oil and gas pipeline plugging method | |
| CN102042727B (en) | Fluid ice preparation method and device thereof | |
| CN212274355U (en) | Phase change cold accumulation ice ball and phase change cold accumulation device | |
| CN209386866U (en) | Jet flow heat of mixing fluid thermal energy storage device | |
| CN109530348A (en) | A kind of drainage pipeline high efficiency washing method | |
| JP2010071633A (en) | Heat storage body, heat storage unit and heat storage system | |
| CN217533711U (en) | Cold chain phase change ice row |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20211221 Address after: 163453 Heilongjiang Province, Daqing City Ranghulu District No. 233 South Central Avenue Applicant after: Daqing Oilfield Co.,Ltd. Applicant after: PetroChina Co Ltd Address before: 163453 Heilongjiang Province, Daqing City Ranghulu District No. 233 South Central Avenue Applicant before: Daqing Oilfield Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |