CN102146792B - Temperature and pressure monitoring cable with protection tube and manufacturing method thereof - Google Patents
Temperature and pressure monitoring cable with protection tube and manufacturing method thereof Download PDFInfo
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Abstract
The invention relates to a temperature and pressure monitoring cable with a protection tube. The manufacturing technology of the test and protection tube has the key points that low-carbon alloy steel is selected as long steel materials to improve the twisting strength of a tubular product, the tensile performance and the weldability of the tubular product; underwater low-temperature welding outer protection tubes are adopted in the welding process and are formed and welded into a whole at one time in a manner of being directly embedded into an internal cable, the cable prefabrication is not required so as to prevent the internal cable from being distorted, extruded and collided, therefore the site construction workload is reduced, and the test construction success rate is improved; and the treatment to the positions of all pressure measurement ports is finished under the non-cutting-off condition so as not to affect the strength of the cable and the test and protection tube. The manufacturing technology of the high-strength test and protection tube has novel concept, is reasonable to design and is easy to implement; and by the utilization of the technology, the high-temperature, high-pressure and corrosion resistant high-strength cable protection cable can be manufactured, the site construction workload can be reduced, and the test operation success rate can be improved.
Description
Technical field
The present invention relates to viscous crude field heat extraction by steam injection technical field, the special-purpose temperature, pressure monitoring cable of particularly testing in horizontal well heat extraction by steam injection process is a kind of outside temperature, pressure monitoring cable and manufacture method thereof that adopts continuous protection tube.
Background technology
SAGD (Steam Assisted Gravity Drainage, be called for short SAGD) be a kind of steam to be injected oil reservoir from a bite straight well or the water horizontal well that is positioned near the horizontal production well top the oil reservoir bottom, to underground continuous steam injection heating oil reservoir; Heated crude oil and steam condensate are driven on every side in producing well, from the method for the horizontal well extraction crude oil of oil reservoir bottom, have higher oil recovery ability, high gas oil ratio, higher ultimate recovery and reduce between well and disturb, and avoid altering between too early well logical advantage.
Often need to test in viscous crude SAGD thermal process, the horizontal well test need to be adopted the temperature, pressure monitoring cable to carry the instrument G.I.H and monitor, and the temperature, pressure cable is the chief component of SAGD thermal recovery point temperature pressure monitoring system.
2008, in the 7th CNPC and the annual meeting of chemical process automation technology, capillary pressure measuring, thermocouple temperature measurement point temperature pressure monitoring article are arranged.SAGD (SAGD) point temperature pressure Dynamic Monitoring is that capillary pressure measuring technology and thermocouple temperature measurement technology are combined; to organize capillary tube and thermocouple on ground in advance in protection tube more, and by injection device, prefabricated protection tube will be advanced to and realize the point temperature pressure monitoring in the stratum.Reserve the multiple spot pressure guide hole on integral joint tubing, the well head place adopts the special seal device that capillary tube and thermocouple cable are drawn, and capillary tube and thermocouple cable is caused to change in ground control box be connected to data collecting system.This technology has the characteristics such as high temperature resistant, high pressure resistant, corrosion-resistant, is fit to do the permanent type monitoring and uses.
At present, the outer protection tube of the temperature, pressure monitoring cable of field by using is coiled tubing.Domestic do not have a matured product, needs import, and expensive, procurement cycle is long.If need to be with the temperature, pressure monitoring cable of protection tube, need be prefabricated in coiled tubing with the temperature, pressure monitoring cable on ground, need block coiled tubing in the pressure tap position in prefabricated process, and pressure tap is processed, and then again weld.Block coiled tubing and again weld the intensity that has a strong impact on coiled tubing, increase difficulty of construction, also have influence on the test success rate simultaneously.
China Patent Publication No.: CN201083125, " the HTHP test cable that is used for the oilfield horizontal well heating exploitation " is provided, include for the armoured thermocouple of thermometric and be used for the capillary tube of pressure measurement, capillary tube has two, be up and down and be set up in parallel, and be located at described both sides capillaceous after described armoured thermocouple bunchy arranged side by side, be coated with insulation and high temperature-resistant polymer resin material at described armoured thermocouple and the outside capillaceous.This test cable can and push horizontal segment under the equipment lower going-into-well, carries out the test that do not stop production with pressure, realizes the down-hole continuous monitoring.
China Patent Publication No.: CN201170093, " Multi-point temperature pressure dynamic monitoring instrument of horizontal well " is provided, formed by thermocouple cable, capillary tube, thermocouple, high temperature pressure-transmission tube, pressure measurement short, coiled tubing, well head capillary tube cable conversion connector.Adopt well head capillary tube cable conversion connector to be connected respectively with thermocouple cable, capillary tube, coiled tubing, pressure measurement short is arranged on coiled tubing, paired thermocouple cable, capillary tube are arranged in it, have high temperature pressure-transmission tube, thermocouple to connect on capillary tube, thermocouple cable is connected with thermocouple.According to geology design temperature pressure point of observation scheme, prefabricated coiled tubing is lowered to the horizontal production well assigned address along pillar, draw the capillary tube cable by well mouth sealing device, and be connected with ground supporting data acquisition and monitoring system, viscous crude level of production well horizontal segment is carried out multi-point temp in realization and pressure is Real-Time Monitoring.
China Patent Publication No.: CN101367152 provides " a kind of self-melting and welding method for hydraulic oil tube ", adopts self-melting and welding method to be welded as a whole the union of hydraulic oil pipe and steel pipe.Reduce the gas hole defect when welding, improved the qualification rate of welding product; Can guarantee the stable and consistent of welding quality to medium and small thin-walled hydraulic oil pipe.
Summary of the invention
The objective of the invention is: a kind of temperature, pressure monitoring cable with protection tube is provided; can and monitor the actual grade preparation temperature pressure monitoring cable of counting according to well depth; utilize protection tube 6 monitoring for protection cables core, improve the application life of temperature, pressure test monitoring cable.Overcome and block coiled tubing, weld pressure measurement short, have a strong impact on the intensity of coiled tubing, increase difficulty of construction, the deficiency of impact test success rate.
The technical solution used in the present invention is: with the temperature, pressure monitoring cable of protection tube, mainly formed by bunch of cables, pressure tap (pressure guide hole), steel wire, mail layer, packed layer and protection tube,
It is characterized in that: bunch of cables is side-by-side by 2～4 pressure measurement capillary tubies and 2～12 pairs of thermocouples, be arranged with 28～32 steel wires around bunch of cables, and steel wire is parallel with bunch of cables; Be wound with the mail layer around steel wire; Packed layer is arranged around the mail layer, continuous protection tube is arranged around packed layer; Packed layer is to adopt extrusion process to be filled into the mail layer and between protection tube; Protection tube has one along the axis weld seam of (vertically); 2～4 pressure tap (pressure guide hole) are arranged in protection on tube wall, the position of pressure tap (pressure guide hole) is every pressure measurement lower end capillaceous, and pressure measurement lower end capillaceous extracts from pressure tap, and pressure measurement lower end capillaceous is outside in pressure tap.Described pressure measurement length capillaceous (position of pressure tap) is to determine according to the reservoir depth of tested well testing; namely need the depth location of test pressure that a pressure tap is arranged on protection tube at each; the capillary tube lower end of corresponding corresponding length, the position of pressure tap arranges according to the monitored oil-well strata degree of depth.Pressure tap is welded on protection tube.
The temperature, pressure monitoring cable is that length is 500～5000m.
The thickness of protection tube is between 1.5～2.7mm; The internal diameter of protection tube is between 13.0～18.0mm.The material of protection tube is D460 steel band, D345 steel band or D235 steel band.
That described packed layer adopts is fluorosioloxane rubber, poly-perfluorinated resin PFA or poly-perfluorinated resin F46, and the thickness of packed layer is between 0.6～1.5mm.
Described mail layer adopts be width between 15～20mm, D235 steel band, D345 steel band or the D195 steel band of thickness between 0.3～0.5mm, be wrapped in steel wire around, during winding, the angle of steel band and steel wire is between 45～60 °.
Manufacture method with the temperature, pressure monitoring cable of protection tube is:
A, at first determines to measure every pressure measurement length capillaceous on the monitoring cable bundle according to the reservoir depth of tested well testing, determines the position of pressure tap (pressure guide hole), and records.Around the side-by-side monitoring cable bundle of pressure measurement capillary tube and thermocouple and even placement steel wire parallel with bunch of cables, steel wire is wound around the mail layer in the exterior circumferential of steel wire and makes the monitoring cable core around bunch of cables.The winding of mail layer is mature technology, is not described in detail.
B, the outside extrusion process parcel one all packed layers that adopt of monitoring cable core of mail layer will be wound around.
C, with extrusion molding the monitoring cable core of packed layer be placed on steel tape, with forming machine, steel tape both sides are rolled, steel tape is rolled into the continuous circular pipe, and the monitoring cable core that will be enclosed with packed layer is wrapped in the continuous circular pipe.
D, internally have the opposite joint on the continuous circular pipe of monitoring cable core to carry out continuous welding, adopt high frequency from fusion welding, welding parameter: current oscillation frequency 400 gigabits, welding temperature are between 1400～1450 ℃, and silica is done the welding negative pole.
E, when being welded to every pressure measurement capillary tube lower end, when namely needing to be welded to the position of pressure tap, be rolled on the circular tube shaped steel horizontal pressure tap of capillary tube aperture position welding by record at steel tape, capillary tube is drawn the pressure tap outside; Complete the temperature, pressure monitoring cable preparation with protection tube.
Welding equipment mainly adopts is electron tube ratio-frequency welded tube equipment in Baoding Redstar High Frequency Equipment Co., Ltd.'s electron tube ratio-frequency welded tube series of products of producing: GP150-0.4-H10; In the monitoring cable core is arranged the welding position of continuous circular pipe in tank, in the continuous circular pipe of monitoring cable core is arranged is the straight tank that passes, have on the tank two side continuous circular pipe place of passing of monitoring cable core to adopt rubber to seal.Pad is at underwater 15～20cm.
From fusion welding, need not scolder, but continuous welding can guarantee that in soldered protection tube, temperature is lower than 60 ℃
Be wound around insulating layer around steel wire, to guarantee the insulation effect of monitoring cable bundle.
Steel tape both sides being rolled the method and apparatus of employing makes identical with common steel pipes with straight.
Through high temperature high voltage resistant, the corrosion resistant high strength monitoring cable that above manufacture method is made, can effectively protect the inside cable bundle in horizontal well test construction and long term monitoring process.
Beneficial effect of the present invention: the temperature, pressure monitoring cable of band protection tube of the present invention, the monitoring cable core in high strength test protection tube is not subjected to the impact of high temperature, corrosion; Can offer pressure tap according to realistic well condition, and the monitoring for protection cable core; The welding pressure tap need not be blocked steel, can not affect the protection tube intensity of completing after manufacturing.Adapt to viscous crude SAGD thermal recovery test, improve the test jobs success rate.
Description of drawings
Fig. 1 is the temperature, pressure monitoring cable structural representation of band protection tube of the present invention.
Fig. 2 is the cross sectional representation of Fig. 1.
In figure, 1. bunch of cables, 2. pressure tap, 3. steel wire, 4. mail layer, 5. insulating layer, 6. protection tube, 7. weld seam.
The specific embodiment
Embodiment 1: take one with the temperature, pressure monitoring cable of protection tube and manufacture method thereof as example, the present invention is described in further detail.
Consult Fig. 1.The temperature, pressure monitoring cable of band protection tube of the present invention mainly is comprised of bunch of cables 1, pressure tap (pressure guide hole) 2, steel wire 3, mail layer 4, packed layer 5 and protection tube 6.
Certain oil well needs the temperature, pressure monitoring cable that length is 1700m, and needs the strata pressure of three oil reservoir key points of monitoring and the formation temperature of main points point.The pressure monitoring degree of depth of three points is respectively 1200m, 1400m and 1700m, and the temperature monitoring degree of depth of six points is respectively 1200m, 1300m, 1400m, 1500m, 1600m and 1700m.
Bunch of cables 1 is side-by-side by three pressure measurement capillary tubies and six pairs of thermocouples, and length of three pressure measurement capillary tubies is 1200m, and second length is 1400m, and the 3rd length is 1700m.The length of six pairs of thermocouples is respectively 1200m, 1300m, 1400m, 1500m, 1600m and 1700m.Be arranged with 30 steel wires 3 around bunch of cables 1, and steel wire 3 is parallel with bunch of cables 1.
Be wound with one deck mail layer 4 around steel wire 3; What mail layer 4 adopted is that width is 15mm, and thickness is the D235 steel band of 0.3mm, be wrapped in steel wire 3 around, during winding, the angle of steel band and steel wire 3 is 45 °, and 30 steel wires 3 are wound around (parcel) tightly.
It is to adopt extrusion process to be filled into mail layer 4 and between protection tube 6 that packed layer 5, packed layer 5 are arranged around mail layer 4; What packed layer 5 adopted is fluorosioloxane rubber, and thickness is 1.3mm.
The position that 2, three pressure tap 2 of three pressure tap are arranged on protection tube 6 walls respectively in distance with temperature, pressure monitoring cable upper end 1200m, the 1400m of protection tube and 1700m place.Be that every pressure measurement lower end capillaceous has a pressure tap 2.
Manufacture method with the temperature, pressure monitoring cable of protection tube is:
A, at first determines to measure that on monitoring cable bundle 1, three pressure measurement length capillaceous are 1200m, 1400m and 1700m, determines the position (degree of depth of well) of pressure tap 2 with this, and records.The side-by-side monitoring cable bundle 1 of pressure measurement capillary tube and thermocouple around and even placement steel wire 3 parallel with bunch of cables 1, steel wire 3 forms circular around bunch of cables, be wound around mail layer 4 in the exterior circumferential of steel wire 3 with the angle of 45 °, make the monitoring cable core.
B, will be wound around the thick packed layer 5 of outside extrusion molding (pressure injection) all 1.3mm of monitoring cable core of mail layer 4, the material of packed layer 5 is fluorosioloxane rubber.
C, with extrusion molding the monitoring cable core of packed layer 5 be placed on steel tape 6, with forming machine, steel tape both sides are rolled, steel tape is rolled into round tube, and the monitoring cable core is wrapped in round tube.
D, the opposite joint of the continuous circular pipe that wrapped up the monitoring cable core is carried out continuous welding in water, welding equipment mainly adopts is electron tube ratio-frequency welded tube equipment in Baoding Redstar High Frequency Equipment Co., Ltd.'s electron tube ratio-frequency welded tube series of products of producing: GP150-0.4-H10; In the monitoring cable core is arranged the welding position of continuous circular pipe in tank, in the continuous circular pipe of monitoring cable core is arranged is the straight tank that passes, have on the tank two side continuous circular pipe place of passing of monitoring cable core to adopt rubber to seal.Pad is at underwater 15～20cm.
Adopt high frequency from fusion welding, parameter: current oscillation frequency 400 gigabits, 1422 ℃ of welding temperatures are done the welding negative pole with silica.The soldered interior temperature of protection tube 6 is between 50～60 ℃, and protection tube 6 forms an axial weld seam 7.
E, when being welded to every pressure measurement capillary tube lower end, when namely needing to be welded to the position of pressure tap 2, be rolled on the circular tube shaped steel horizontal pressure tap 2 of capillary tube aperture position welding by record at steel tape, capillary tube is drawn pressure tap 2 outsides; Complete the temperature, pressure monitoring cable preparation with protection tube 6.
Claims (1)
1. the temperature, pressure monitoring cable with protection tube, mainly be comprised of bunch of cables (1), pressure tap (2), steel wire (3), mail layer (4), packed layer (5) and protection tube (6),
It is characterized in that: bunch of cables (1) is side-by-side by 2～4 pressure measurement capillary tubies and 2～12 pairs of thermocouples, be arranged with 28～32 steel wires (3) around bunch of cables (1), and steel wire (3) is parallel with bunch of cables (1); Be wound with mail layer (4) around steel wire (3); At mail layer (4), packed layer (5) is arranged on every side, continuous protection tube (6) is arranged around packed layer (5); Packed layer (5) is to adopt extrusion process to be filled into mail layer (4) and between protection tube (6); Protection tube (6) has a weld seam along axis (7); On protection tube (6) wall, 2～4 circular pressure tap (2) are arranged, the position of pressure tap (2) is every pressure measurement lower end capillaceous, pressure measurement lower end capillaceous extracts from pressure tap (2), and pressure tap (2) is welded on protection tube (6);
The temperature, pressure monitoring cable is that length is 500～5000m;
The thickness of protection tube (6) is between 1.5～2.7 ㎜; The internal diameter of protection tube (6) is between 13.0～18.0 ㎜, and the material of protection tube 6 is D460 steel band, D345 steel band or D235 steel band;
That described packed layer (5) adopts is fluorosioloxane rubber, poly-perfluorinated resin PFA or poly-perfluorinated resin F46, and the thickness of packed layer (5) is between 0.6～1.5 ㎜;
What described mail layer (4) adopted is that width is between 15～20 ㎜, D235 steel band, D345 steel band or the D195 steel band of thickness between 0.3～0.5 ㎜, be wrapped in steel wire (3) around, during winding, the angle of steel band and steel wire (3) is between 45～60 °;
The manufacture method of described temperature, pressure monitoring cable with protection tube is:
A, at first, determine to measure the upper every pressure measurement of monitoring cable bundle (1) length capillaceous according to the reservoir depth of tested well testing, determine the position of pressure tap (2), and record, the side-by-side monitoring cable bundle (1) of pressure measurement capillary tube and thermocouple on every side and with the parallel even placement steel wire of bunch of cables (1) (3), steel wire (3) is made the monitoring cable core at the exterior circumferential winding mail layer (4) of steel wire (3) around bunch of cables;
B, the outside extrusion process parcel one all packed layers (5) that adopt of monitoring cable core of mail layer (4) will be wound around;
C, the monitoring cable core that will be enclosed with packed layer (5) are placed on steel tape (6), with forming machine, steel tape both sides are rolled, steel tape is rolled into the continuous circular pipe, and the monitoring cable core that will be enclosed with packed layer (5) is wrapped in the continuous circular pipe;
D, internally have the opposite joint of the continuous circular pipe of monitoring cable core to carry out continuous welding, adopt high frequency from fusion welding, welding parameter: current oscillation frequency 400 gigabits, welding temperature are between 1400～1450 ℃, and silica is done the welding negative pole;
E, when being welded to every pressure measurement capillary tube lower end, when namely needing to be welded to the position of pressure tap (2), be rolled on the circular tube shaped steel a capillary tube aperture position welding horizontal pressure tap (2) by record at steel tape, capillary tube is drawn pressure tap (2) outside; Complete the temperature, pressure monitoring cable preparation of band protection tube (6);
The welding equipment that adopts in the manufacture method of described temperature, pressure monitoring cable with protection tube is the electron tube ratio-frequency welded tube equipment in electron tube ratio-frequency welded tube series of products: GP150-0.4-H10; In the monitoring cable core is arranged the welding position of continuous circular pipe in tank, in the continuous circular pipe of monitoring cable core is arranged is the straight tank that passes, have on the tank two side continuous circular pipe place of passing of monitoring cable core to adopt rubber to seal; Pad is at underwater 15～20cm.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102383782B (en) * | 2011-11-15 | 2014-11-26 | 中国石油天然气股份有限公司 | Small-diameter high temperature heat-insulating pressure measuring unit |
| CN103226171B (en) * | 2012-01-30 | 2015-06-24 | 上海市电力公司 | Method for monitoring electric cable current-carrying thermal effect redundancy |
| CN103147733B (en) * | 2013-03-12 | 2015-08-05 | 中国石油天然气股份有限公司 | The electric ignition of combustion in situ rolling-up type and monitoring system |
| CN109396210A (en) * | 2018-11-08 | 2019-03-01 | 鑫国集团有限公司 | A kind of dedicated electrometric sensor in oil field |
| CN111980684B (en) * | 2019-05-05 | 2023-09-26 | 中国石油天然气股份有限公司 | Coiled tubing temperature and pressure monitoring optical cable and manufacturing method thereof |
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