CN2683840Y - Well mouth heating-up and thermal insulation equipment - Google Patents
Well mouth heating-up and thermal insulation equipment Download PDFInfo
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- CN2683840Y CN2683840Y CN 200320101034 CN200320101034U CN2683840Y CN 2683840 Y CN2683840 Y CN 2683840Y CN 200320101034 CN200320101034 CN 200320101034 CN 200320101034 U CN200320101034 U CN 200320101034U CN 2683840 Y CN2683840 Y CN 2683840Y
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- heating
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Abstract
The utility model discloses a well mouth heating and heat preserving device which comprises a heating and heat preserving device and a power supply temperature control device, wherein, the heating and heat preserving device is composed of four parts which are a well mouth heating and heat preserving body, a pressure returning pipe heat preserving body, a pressure returning valve heat preserving body and a sleeve pipe four-way heat preserving body, wherein, the well mouth heating and heat preserving body contains components above the well mouth sleeve pipe four-way, a producing valve, a nozzle tip sleeve and a plug; the well mouth heating and heat preserving body is divided into an outer shell, a heat preserving layer, a heater and a heat transferring layer from outside to inside; the shape of the outer shell is especially made according to the partial special shape of each well mouth; the heater converts electric energy to heat energy; a well is indirectly heated from the mouth through heating heat conducting liquid of an electric heater in the heater; each of the pressure returning pipe heat preserving body, the pressure returning valve heat preserving body and the sleeve pipe four-way heat preserving body is composed of an outer shell and a heat preserving layer for preserving heat for the well mouth. A temperature sensor of the power supply temperature control device transmits temperature signals to a temperature controller; the action of the temperature controller controls an AC relay to be operated or disconnected so as to switch on or switch off the heater in the well mouth heating and heat preserving body and determine whether to heat the well mouth.
Description
One, technical field
The utility model relates to the rod-pumped well jaws equipment, relates in particular to well head heating and heat-insulating device in a kind of winter.
Two, background technology
Each oil field does not have good measure to the well head heat tracing in the winter time now, what have can only heat and can not be incubated well head, and cost height, what have can only be incubated well head, and can not heat, and non-dismountable, the high waste of cost is big, labour intensity is also big, and is unfavorable for regular maintenance, operation and construction, and unicity is strong.
Three, summary of the invention
The technical problems to be solved in the utility model is to improve the shortcoming and defect of prior art, provides the wellhead assembly of a kind of well head heating, insulation double action.
The technical scheme that the utility model is dealt with problems is a kind of well head heating and heat-insulating device, comprises heating and heat-insulating device, power supply attemperating unit.Heating and heat-insulating device is made up of the insulation of four parts: well head heat tracing body, back pressure pipe insulation, back pressure gate insulation, four-way junction of casing insulation; Well head heat tracing body is wrapped in the parts more than the well head four-way junction of casing and production gate, oil nozzle cover, plug wherein, and its ecto-entad is divided into shell, insulation layer, heater, heat transfer layer; The shape of shell is made to measure according to the local special shape of each well head, its architectural feature is with the tapered cylinder separated into two parts, a part is 2/3 large semicircle, itself and channel-section steel are processed into one, another part is 1/3 small semicircle, and it and clamp are processed into one, adorn 2/3 large semicircle during installation earlier, again with on the 1/3 small semicircle card, two parts with the tight card of buckle well; Insulation layer has good heat-insulating property; Heater is made according to each well head local shape, it is installed in 2/3 large semicircle of shell, it is characterized in that 2/3 big tapered cylinder and channel-section steel is processed into one composition three-port structure, it is by the inside and outside identical two-layer casing of forming the hollow sealing structure through suppressing and welding, electric heater and conductive fluid are housed in the casing, explosion-proof valve and temperature detector are installed on the tank wall, its principle is that electric energy is converted into heat energy by electric heater, and the conductive fluid in the casing heated, make conductive fluid reach certain temperature, thereby realize well head heating (temperature of heater is according to the control of well head needs, and general conductive fluid is between 70 ℃-280 ℃); The direct contact arrangement of heat transfer layer surface separates equipment and heater, and it has good heat transfer, wear-resisting and insulating properties; Back pressure pipe insulation is wrapped in the back pressure pipeline wherein, and back pressure table and sample valve are housed on it, and cylindrical case, insulation layer that it is cracked by band are formed, and utilizes the scalability of material to be stuck on the pipeline during installation, tightens with the outside card that tightens up again; Back pressure gate insulation is made up of shell, the insulation layer of three-way shape, utilizes the scalability of material to be stuck on the gate valve seat during installation, tightens with the outside card that tightens up again; The four-way junction of casing insulation is made up of the shell (cylinder and cuboid are formed) and the insulation layer of four-way structure, the architectural feature of shell is with the cylinder separated into two parts, a part is 2/3 large semicircle, itself and cuboid channel-section steel are processed into one, another part is 1/3 small semicircle, and it and clamp are processed into one, adorn 2/3 large semicircle during installation earlier, again with on the 1/3 small semicircle card, two parts with the tight card of buckle well; The power supply attemperating unit comprises power input, power switch, power supply indicator, burner on light, temperature controller, signal input part, signal output part, AC relay, earth leakage protective device, power output end, above-mentioned parts are installed in the oil pumper control cabinet, and anti-explosion terminal box is installed on the shell of well head heat tracing body; Temperature detector is attached to the top of heater; Its action principle is: the temperature detector probe monitoring heter temperature of temperature controller, when temperature is lower than the requirement temperature, temperature controller is had an effect, make the AC relay adhesive, connect the heater in the well head heating and heat-insulating device, electric heater in the heater heats conductive fluid, thereby realizes well head is heated; When temperature reaches the requirement temperature, the temperature controller effect, AC relay disconnects, and makes well head heater be in off-position, stops the well head heating.Explosion-proof valve is housed on the heater, can prevents the too high generation of temperature accident in addition.
The utility model has the following advantages compared with prior art:
1, heating and heat-insulating device, heating and insulation can be used simultaneously, also can use separately, and exceptional well (thick as oil, contain cured height) is used heating and heat-insulating device, can only use the well head attemperator to most wells.
2, heating and heat-insulating device easy accessibility is beneficial to maintenance, maintenance, operation and the construction of everyday devices.
3, heating and heat-insulating device can be general reusable again, and with low cost, and popularization is strong.
4, the power supply attemperating unit can carry out adjustment by temperature controller according to the oil well concrete condition, guarantees the oil well ordinary production.
5, the power supply attemperating unit has the electric heater of earth leakage protective device and explosion-protection equipment, well head heat tracing body that explosion-protection equipment is also arranged, and can guarantee that equipment, the person producing and the safety of shutdown period.
Four, description of drawings
Fig. 1 is the utility model well head heating and heat-insulating device mounting structure schematic diagram;
Fig. 2 is the well head heat tracing body structure schematic diagram of the utility model Fig. 1;
Fig. 3 looks schematic diagram for the well head heat tracing side of Fig. 2;
Fig. 4 is the large semicircle structural representation of Fig. 2;
Fig. 5 is the small semicircle structural representation of Fig. 2;
Fig. 6 is the small semicircle schematic top plan view of Fig. 5;
Fig. 7 is the channel-section steel structural representation of Fig. 4;
Fig. 8 is the calandria structural representation of the well head heat tracing body of Fig. 2;
Fig. 9 is the schematic side view of Fig. 8;
Figure 10 is the schematic top plan view of Fig. 8
Figure 11 guarantees warm body structure schematic diagram for the back pressure of Fig. 1;
Figure 12 guarantees warm side for the back pressure of Figure 11 and looks schematic diagram;
Figure 13 is the back pressure gate insulation structural representation of Fig. 1;
Figure 14 is the back pressure gate insulation schematic side view of Figure 13;
Figure 15 is the back pressure gate insulation schematic top plan view of Figure 13;
Figure 16 is the four-way junction of casing insulation structural representation of Fig. 1;
Figure 17 is the four-way junction of casing insulation schematic side view of Figure 16;
Figure 18 is the large semicircle structural representation of Figure 17;
Figure 19 is the small semicircle structural representation of Figure 18;
Figure 20 is the small semicircle schematic top plan view of Figure 19;
Figure 21 is the circuit diagram of the power supply attemperating unit of the utility model Fig. 1.
Four, the specific embodiment
Referring to Fig. 1 to Figure 21, a kind of well head heating and heat-insulating device, comprise packing box 1, well head heat tracing body 2, and the inner parts of four-way junction of casing more than 11, produce gate 3, oil nozzle cover 5, plug 6, temperature detector 17 that pastes on the heater 2-63 wall and signal transmssion line 16, there is the back pressure pipeline back pressure pipe insulation 7 inside, back pressure table 4 and sample valve 8 are arranged at top, there is back pressure gate 9 back pressure gate insulation 10 inside, there are four-way junction of casing 11 and sleeve gate 13 in four-way junction of casing insulation 12 inside, power supply attemperating unit 18 is connected with anti-explosion terminal box 15 by output cable 14, and the other end links to each other with signal transmssion line 16.Well head heat tracing body 2 comprises large semicircle 2-1, small semicircle 2-2 and cover plate 2-5 and heater 2-63; Back pressure pipe insulation 7 comprises shell 7-1, insulation layer 7-2 and tightens up card 7-3; Back pressure gate insulation 10 comprises valve seat lagging casing 10-1, insulation layer 10-2 and tightens up card 10-3; Four-way junction of casing insulation 12 comprises large semicircle 12-1, small semicircle 12-2, cover plate 12-5 and insulation layer 12-9; The power supply attemperating unit comprises power input 18-1, power switch 18-2, power supply indicator 18-3, burner on light 18-4, temperature controller 18-5, signal input part 18-6, signal output part 18-7, AC relay 18-8, earth leakage protective device 18-9, power output end 18-10, temperature detector 17, anti-explosion terminal box 15 and signal transmssion line 16.The shell of well head heat tracing body 2 is made of the glass fiber reinforced plastic body of three-port structure tapered cylinder and cuboid, wherein large semicircle 2-1 is that 2/3 big and channel-section steel 2-6 of tapered cylinder is processed into one, small semicircle 2-2 is that 1/3 big and clamp 2-4 of tapered cylinder is processed into one, clamp 2-4 outer end half round cut and cover plate 2-5 half round cut are for producing the extending port of gate 3 handwheels, on cover plate 2-5, also has a circular hole in addition for the ease of installing back pressure pipe insulation 7, the step that indent is arranged in the edge of large semicircle 2-1, there is the hole card 2-8 of square hole 2-7 and small semicircle 2-2 edge to be used on the step, outside large semicircle 2-1 and small semicircle 2-2 side seam, tighten up card 2-3, the step that indent is also arranged in the edge of channel-section steel 2-6, there is the hole card 2-8 on square hole 2-7 and clamp 2-4 and the cover plate 2-5 edge to be used on the step, thereby guaranteed the leakproofness of housing, the inside heat tracing structure ecto-entad of large semicircle 2-1 is divided into shell 2-61, insulation layer 2-62, heater 2-63 and heat transfer layer 2-64, heater 2-63 makes according to the well head local shape, be installed in 2/3 large semicircle of shell, it is processed into one composition three-port structure with 2/3 big tapered cylinder 2-66 and channel-section steel 2-67, it is by the inside and outside identical two-layer casing of forming the hollow sealing structure through suppressing and welding, electric heater 2-69 and conductive fluid 2-68 are installed in the casing, explosion-proof valve 2-65 and temperature detector 17 are housed on the tank wall; When the heat tracing body is installed, earlier large semicircle 2-1 is placed in four-way junction of casing 11 with upper-part with produce outside gate 3, oil nozzle cover 5 and the plug 6, after with small semicircle 2-2 card thereon, make it with large semicircle 2-1 and tighten together, to tighten up card 2-3 card good with outside again, and cover plate 2-5 is installed at last; The hollow tube that back pressure pipe insulation is made of cylindrical case 7-1 and insulation layer 7-2, card 7-3 is tightened up in the outside, according to after the concrete shape cutting of back pressure pipeline, is placed in outside the back pressure pipe during installation, and good with tightening up card 7-3 card; Back pressure gate insulation 10 structures are notched triplet type, and there is insulation layer 10-2 inside, and the shell 10-1 with three-way shape during installation is stuck in outside the valve body of back pressure gate 9, with indentation, there to tighten up card 10-3 card good; The glass fiber reinforced plastic body of four-way structure is made of in the outside of four-way junction of casing insulation 12 cylinder and cuboid, wherein large semicircle 12-1 is that cylindrical 2/3 big and symmetrical two channel-section steel 12-6 are processed into one, small semicircle 12-2 is that cylindrical 1/3 big and symmetrical two clamp 12-4 are processed into one, clamp 12-4 outer end half round cut and cover plate 12-5 half round cut are the extending port of sleeve gate 13 handwheels, also has a semicircle breach for the ease of various device is installed at place, cover plate 12-5 outer end in addition, the step that indent is arranged in the edge of large semicircle 12-1, there is the hole card 12-8 of square hole 12-7 and small semicircle 12-2 edge to be used on the step, outside large semicircle 12-1 and small semicircle 12-2 side seam, tighten up card 12-3, the step that indent is also arranged in the edge of channel-section steel 12-6, there is the hole card 12-8 on square hole 12-7 and clamp 12-4 and the cover plate 12-5 edge to be used on the step, there is insulation layer 12-9 inside, during installation, earlier large semicircle 12-1 is placed in outside four-way junction of casing 11 and the sleeve gate 13, after with small semicircle 12-2 card thereon, to tighten up card 12-3 card good with outside again, and cover plate 12-5 is installed at last; Power supply attemperating unit 18 is installed in the oil pumper control cabinet, anti-explosion terminal box 15 is installed on the shell 2-61 of well head heat tracing body 2, temperature detector 17 is attached to heater 2-63 top, power supply attemperating unit 18 is made up of 380V or 220V circuit, power input 18-1 connects the alternating current of 380V or 220V, by power switch 18-2, AC relay 18-8, earth leakage protective device 18-9,, send to heater by power output end 18-10 output; Temperature controller 18-5 connects 380V or 220V alternating current, link to each other with temperature detector 17 by signal transmssion line 16 with signal output part 18-7 by signal input part 18-6, temperature detector 17 is passed to temperature controller 18-5 with temperature signal, when temperature is lower than the requirement temperature, temperature controller 18-5 has an effect, connect 380V or 220V circuit, make AC relay 18-8 adhesive, from and connect 380V or 220V circuit, connect well head heater 2-63 by anti-explosion terminal box 15, power supply indicator 18-3, burner on light 18-4 are bright at this moment; When temperature reached the requirement temperature value, temperature controller 18-5 had an effect, and disconnected 380V or 220V circuit, AC relay 18-8 is disconnected, stop the power supply to well head heater 2-63 thereby disconnect 380V or 220V circuit, this moment, power supply indicator 18-3 was bright, and burner on light 18-4 goes out.
Claims (10)
1, a kind of well head heating and heat-insulating device comprises heating and heat-insulating device, power supply attemperating unit; Heating and heat-insulating device is made up of the insulation of four parts, well head heat tracing body, back pressure pipe insulation, back pressure gate insulation, four-way junction of casing insulation; Well head heat tracing body is wrapped in the parts more than the well head four-way junction of casing and production gate, oil nozzle cover, plug wherein, and its ecto-entad is divided into shell, insulation layer, heater, heat transfer layer; Back pressure pipe insulation comprises shell, insulation layer; Back pressure gate insulation comprises shell, insulation layer; The four-way junction of casing insulation comprises shell, insulation layer; The power supply attemperating unit comprises power input, power switch, power supply indicator, burner on light, temperature controller, signal input part, signal output part, AC relay, earth leakage protective device, power output end, above-mentioned parts are installed in the oil pumper control cabinet, anti-explosion terminal box is installed on the shell of well head heat tracing body, temperature detector is attached to heater top, and explosion-proof valve is installed in heater top; The shape that it is characterized in that described well head heat tracing body case (2-61) is made to measure according to the local special shape of each well head, outside specifically be shaped as (2-1--2-8), its positioned inside insulation layer (2-62), heater (2-63), heat transfer layer (2-64), the outer shape of heater 2-63 is the three-port structure that (2-66,2-67) forms, its inner electric heater (2-69) and conductive fluid (2-68) of installing, explosion-proof valve (2-65) and temperature detector (17) are installed on the tank wall, and the back pressure pipeline installs back pressure pipe insulation (7-1,7-2,7-3) outward; The back pressure gate is installed back pressure gate insulation (10-1,10-2,10-3) outward, four-way junction of casing (11) outer mounting sleeve four-way insulation (12-1--12-9), the power input (18-1) of power supply attemperating unit (18) connects power switch (18-2), AC relay (18-8), earth leakage protective device (18-9), is exported by power output end (18-10), and is provided with power supply indicator (18-3) and burner on light (18-4); Temperature controller (18-5) is in parallel with AC relay (18-8), and temperature detector (17) links to each other with signal output part (18-7) with the signal input part (18-6) of temperature controller (18-5) by signal transmssion line (16).
2, well head heating and heat-insulating device according to claim 1, the shape that it is characterized in that described well head heat tracing body case (2-61) is to make to measure according to the local special shape of each well head, it with four-way junction of casing (11) with upper-part, produce gate (3), oil nozzle cover (5), and plug (6) is wrapped in wherein, and make the three-port structure of forming by tapered cylinder and cuboid, wherein large semicircle (2-1) is processed into one for 2/3 big and channel-section steel (2-6) of tapered cylinder, small semicircle (2-2) is processed into one for 1/3 big and clamp (2-4) of tapered cylinder, clamp (2-4) outer end half round cut and cover plate (2-5) half round cut are for producing the extending port of gate (3) handwheel, go up at cover plate (2-5) in addition and also have a circular hole for the ease of installing back pressure pipe insulation (7), the step that indent is arranged in the edge of large semicircle (2-1), there are the square hole (2-7) and the hole card (2-8) of small semicircle (2-2) edge to be used on the step, outside large semicircle (2-1) and small semicircle (2-2) side seam, tighten up card (2-3), the step that indent is also arranged in the edge of channel-section steel (2-6), there is the hole card (2-8) on square hole (2-7) and clamp (2-4) and cover plate (2-5) edge to be used on the step, thereby guaranteed the leakproofness of housing.
3, well head heating and heat-insulating device according to claim 1 and 2, it is characterized in that there are insulation layer (2-62), heater (2-63) and heat transfer layer (2-64) in described well head heat tracing body (2) inside, insulation layer (2-62) has good heat-resisting and heat-insulating property; Heater (2-63) is made according to each well head local shape, and the parts that it is above with well head four-way junction of casing (11) and production gate (3), oil nozzle cover (5), plug (6) are wrapped in wherein, and are installed on the heat transfer layer (2-64), and it is converted into heat energy with electric energy; Heat transfer layer (2-64) is the contact arrangement surface directly, and equipment and heater (2-63) are separated, and it has good heat transfer, wear-resisting and insulating properties.
4, according to claim 1 or 2 or 3 described well head heating and heat-insulating devices, the heater (2-63) that it is characterized in that described well head heat tracing body (2), it is installed in 2/3 large semicircle of shell, it is processed into one composition three-port structure with 2/3 big tapered cylinder (2-66) with channel-section steel (2-67), it is by the inside and outside identical two-layer casing of forming the hollow sealing structure through suppressing and welding, electric heater (2-69) and conductive fluid (2-68) are installed in the casing, explosion-proof valve (2-65) and temperature detector (17) are installed on the tank wall.
5, according to claim 1 or 2 or 3 or 4 described Well head heating thermal insulation devices; The heater (2-63) that it is characterized in that described well head heat tracing body (2); Electric heater (2-69) and conductive fluid (2-68) are installed in the casing; Explosion-proof valve (2-65) and temperature detector (17) are installed on the tank wall; It is converted into heat energy with electric energy by electric heater (2-63); And the conductive fluid in the casing (2-68) heated; Make conductive fluid (2-68) reach certain temperature; Thereby realize the well head heating; Explosion-proof valve (2-65) can prevent that in addition accident takes place excess Temperature in the casing
6, well head heating and heat-insulating device according to claim 1 is characterized in that the hollow tube of described back pressure pipe insulation (7) for cylindrical case (7-1) and insulation layer (7-2) formation, and card (7-3) is tightened up in the outside, can be various tubes and is incubated.
7, well head heating and heat-insulating device according to claim 1, it is characterized in that described back pressure gate insulation (10) shell (10-1) is notched three-port structure, there is insulation layer (10-2) inside, and outside threeway indentation, there is tightened up card (10-3), can be various valves and is incubated.
8, well head heating and heat-insulating device according to claim 1, it is characterized in that the four-way structure that the shell of described four-way junction of casing insulation (12) is made up of cylinder and cuboid, be installed on four-way junction of casing (11) and the sleeve gate (13), wherein large semicircle (12-1) is processed into one with symmetrical two channel-section steels (12-6) greatly for cylindrical 2/3, small semicircle (12-2) is processed into one with symmetrical two clamps (12-4) greatly for cylindrical 1/3, clamp (12-4) outer end half round cut and cover plate (12-5) half round cut are the extending port of sleeve gate (13) handwheel, also has a semicircle breach for the ease of various device is installed at place, cover plate (12-5) outer end in addition, the step that indent is arranged in the edge of large semicircle (12-1), there are the square hole (12-7) and the hole card (12-8) of small semicircle (12-2) edge to be used on the step, outside large semicircle (12-1) and small semicircle (12-2) side seam, tighten up card (12-3), the step that indent is also arranged in the edge of channel-section steel (12-6), there is the hole card (12-8) on square hole (12-7) and clamp (12-4) and cover plate (12-5) edge to be used on the step, insulation layer (12-9) is arranged in the shell.
9, well head heating and heat-insulating device according to claim 1, it is characterized in that described power supply attemperating unit (18), power input (18-1) connects alternating current, by power output end (18-10) output, give well head heater (2-63) power supply by power switch (18-2), AC relay (18-8), earth leakage protective device (18-9); Temperature controller (18-5) connects alternating current, is connected with temperature detector (17) by signal transmssion line (16) by signal input part (18-6), signal output part (18-7).
10, according to claim 1 or 9 described well head heating and heat-insulating devices, it is characterized in that described power supply attemperating unit (18), temperature detector (17) is passed to temperature controller (18-5) with temperature signal, when temperature is lower than the requirement temperature, temperature controller (18-5) is had an effect, and connects circuit, makes AC relay (18-8) adhesive, thereby connect well head heater (2-63) by anti-explosion terminal box (15), this moment, power supply indicator (18-3), burner on light (18-4) were all bright; When temperature reaches the requirement temperature, temperature controller (18-5) effect, disconnecting circuit disconnects AC relay (18-8), thus disconnecting circuit stops to well head heater (2-63) power supply, and power supply indicator this moment (18-3) is bright, and burner on light (18-4) goes out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320101034 CN2683840Y (en) | 2003-10-08 | 2003-10-08 | Well mouth heating-up and thermal insulation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320101034 CN2683840Y (en) | 2003-10-08 | 2003-10-08 | Well mouth heating-up and thermal insulation equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2683840Y true CN2683840Y (en) | 2005-03-09 |
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ID=34599116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320101034 Expired - Fee Related CN2683840Y (en) | 2003-10-08 | 2003-10-08 | Well mouth heating-up and thermal insulation equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2683840Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747983A (en) * | 2012-07-23 | 2012-10-24 | 刘旭 | Constant temperature control technology for mining wellhead |
| CN106761524A (en) * | 2016-11-17 | 2017-05-31 | 东营市金亿来石油机械有限公司 | A kind of electric heating thermal insulation anti-theft oil extracting wellhead |
| CN110107257A (en) * | 2019-04-12 | 2019-08-09 | 江苏中船海洋设备有限公司 | High efficiency energy storage environmental protection well head heat-preserving equipment device |
-
2003
- 2003-10-08 CN CN 200320101034 patent/CN2683840Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747983A (en) * | 2012-07-23 | 2012-10-24 | 刘旭 | Constant temperature control technology for mining wellhead |
| CN106761524A (en) * | 2016-11-17 | 2017-05-31 | 东营市金亿来石油机械有限公司 | A kind of electric heating thermal insulation anti-theft oil extracting wellhead |
| CN110107257A (en) * | 2019-04-12 | 2019-08-09 | 江苏中船海洋设备有限公司 | High efficiency energy storage environmental protection well head heat-preserving equipment device |
| CN110107257B (en) * | 2019-04-12 | 2021-05-25 | 江苏中船海洋设备有限公司 | High-efficiency energy-storage environment-friendly wellhead thermal insulation equipment device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |