A device for cleaning the inner surface of neftekhim

 

A device for cleaning the inner surface of Neftekhim relates to the oil industry and can be used for cleaning the internal surfaces of pipes, oil wells from asfaltenovyh and paraffin deposits, in particular in the extraction of oil from wells drilled in the permafrost zone. The device includes a hermetically sealed tubular conductive composite body. The connecting head is adjusted to an integral part of the housing has a detachable insulated from her site under the electrodes and mounted inside the housing with the possibility of separating the cavity at the working and auxiliary chambers. The electrode with the conductive tip is immersed in a conductive solution in the lower part of the working chamber. There is an electrode in the auxiliary chamber, one end of which is associated with the current-carrying cable, the other end through the detachable stand - alone node with the electrode of the working chamber. In a connection head made channels with messages of the working chamber with the auxiliary. The technical result is ensured by the smooth movement of the device in forward and reverse directions, reduces the complexity of the treatment works well and increases the sa across its surface. 2 Il.

The invention relates to the oil industry and can be used for cleaning the internal surfaces of pipes, oil wells from asfaltenovyh and paraffin deposits, in particular in the extraction of oil from wells drilled in the permafrost zone.

A device for cleaning the inner surface of the downhole pipe and.with. The USSR №1613588, MKI 5 E 21 B 43/24, BI No. 46, 1990, containing a hermetically sealed tubular conductive casing forming a working chamber, an electrode submerged in a conductive solution in the lower part of the working chamber, and a current-carrying cable.

The closest in technical essence and adopted for the prototype is a device for cleaning the inner surface of Neftekhim under the patent of Russia №93049592, MKI 6 E 21 In 43/24, publ. 11.20.1966 containing a hermetically sealed tubular conductive casing forming a working chamber, an electrode with a conductive tip is immersed in a conductive solution in the lower part of the working chamber, and a current-carrying cable.

A common disadvantage of the above devices is that difficult to reverse device in an oil well. As cleaning Neftekhim from asphalt is the your asfaltosmesitelnye and paraffin deposits to liquid forced out of Neftekhim by the device on the surface of the array. However, under the influence of the temperature of the external environment asfaltosmesitelnye and paraffin deposits undergo amorphous transformation from liquid to solid, unable to flow from the well. The formation of a hard resin, paraffin deposits on the walls of the borehole reduces the diameter of the hole and, as a consequence, deterioration of the conditions of the patency of the device in a reverse its course. This is because the warming of the sediments carried by the device from the side of the working chamber, i.e. from the front side of the device, since the upper, i.e., auxiliary, Luggage over the head is not working. The upper part of the tubular housing when not warmed up. Therefore, even a slight deposition in oil well create insurmountable obstacles to the return stroke of the device. The heating of the upper part of the housing prevents the connecting head with the insulator, which completely covers the body cavity, and also the access of heat from the working chamber. The result in the device operating temperature is only supported in its front part, which is a positive effect on its intended course, but the reverse is difficult. In order to remove the device from the well, and olitely costs time and money.

The basis of the invention the task is to improve a device for cleaning the inner surface of Neftekhim through redistribution of thermal energy, to ensure uniform heating of the body over its entire surface and to achieve a smooth movement of the device in forward and backward directions, to reduce the complexity of the treatment works well and significantly better performance.

This object is achieved in that the device for cleaning the inner surface of Neftekhim containing a hermetically sealed tubular conductive casing forming a working chamber, an electrode with a conductive tip is immersed in a conductive solution in the lower part of the working chamber, and a current-carrying cable, according to the invention, the body is made of composite of composite parts, the device is equipped with a connecting cylinder part of the body that is installed inside the housing with the possibility of separating the cavity at the working and auxiliary chambers, in the auxiliary chamber placed electrode, the connecting head has channels for communication of the working chamber with the auxiliary and detachable insulated from her site under eancom through the split node connection head - with the electrode of the working chamber.

Distinctive features, namely, that the body is made of composite of composite parts, the device is equipped with a connecting cylinder part of the body that is installed inside the housing with the possibility of separating the cavity at the working and auxiliary chambers, in the auxiliary chamber placed electrode, the connecting head has channels for communication of the working chamber with the auxiliary and detachable insulated from her site under the electrodes, and the electrode in the auxiliary chamber one end of which is connected with the current-carrying cable, the other end through the split node connecting the head with the electrode of the working chamber, in conjunction with the known characteristics of the claims, containing a hermetically sealed tubular conductive casing forming a working chamber, an electrode with a conductive tip is immersed in a conductive solution in the lower part of the working chamber, and a current-carrying cable allowed us to create a device for the treatment of oil wells, in which case every point of its surface is heated during operation to a temperature necessary and sufficient to melt asfaltenovyh or PA is exploitatie, simplicity and service culture.

The invention is illustrated by drawings, where Fig.1 presents a General view of the device for cleaning the inner surface of Neftekhim;

in Fig.2 - the device in cross section along a-A.

A device for cleaning the inner surface of Neftekhim contains a hermetically sealed tubular conductive body 1, the connecting head 2 under component parts 3, 4 of the housing 1 with a detachable insulated from it by node 5 under the electrodes 6, 7. The connecting head 2 is installed in the housing 1 can be divided cavity working on 8 and 9 auxiliary camera. In the working chamber 8 is placed electrode 6 with a conductive tip 10. In the lower part of the working chamber filled conductive solution 11, in which is immersed the conductive tip 10. In 9 auxiliary chamber placed electrode 7, one end of which is associated with the current-carrying cable 12 and at the other end through the split node 5 with the electrode 6 of the working chamber 8. The connecting head 2 is isolated from the electrodes by means of insulators 13, 14. In a connection head 2 is made through the channels 15, indicating the working chamber 8 with the auxiliary 9.

A device for cleaning the inner surface of Neftekhim R the situations pipes in the well 1 to the load-carrying cable to a depth of beginning asfaltenovyh and paraffin deposits. In the initial state in the working chamber 8 in its lower part has a conductive solution 11, in particular a salt solution, in which is immersed the conductive tip 10. Through the current-carrying cable 12 to the electrodes 6, 7 is fed supply voltage. Under the action of electric current flowing through the conductive solution 11, in particular a salt, an alkaline or acid solution 2, solution is heated in the chamber 8 to the boiling point. The resulting steam is directed into the upper part of the working chamber and through the channels 15 penetrates 9 in the auxiliary chamber.

Under the influence of the vapor of electrically conductive liquid 11 is provided heating body 9 auxiliary chamber to a temperature close to or equal to the temperature of the housing of the working 8 camera.

In the heating process involves condensation of vapors salt solution, while the fluid from the auxiliary chamber through the channels 15 flows back into the working chamber 8.

The change in the physical state of a salt solution is accompanied by a switching circuit tip - electrolyte. Taken the mass ratio of the salt solution in the working chamber 8 and the power conductive tip specifies the device optimal lineu 9 and 8 working chambers of the housing 1 there is intense it to warm up at all levels, which ensures the maintenance and stabilization of the overall body temperature across its surface.

When the contact housing 1 with asfaltosmesiteli and paraffin deposits under the action of heat is melting. As melting of the sediment surface oil wells shall be exempt from them, and are unhindered conditions for subsequent direct promotion. The molten mass is removed from the borehole to the surface of the processed block by water, which is in the process of doing cleaning work is injected into the well. In the case of solidification of the molten mass at the outlet of Neftekhim under the influence of the ambient temperature periodic reciprocating motion device restore previous mode of cleaning well. This is achieved by the fact that the entire surface of the body warmed up and works the same as with direct and reverse course. The high maneuverability of the device during the cleaning process has the potential to significantly increase the speed of drilling a well, to eliminate the time-consuming operation to remove the device from the well and to ensure optimum cleaning.

Industrial tests of the inventive device of the mouth of the STW-prototype;

eliminated time-consuming operation to remove the device from the borehole;

improved service culture device.

Claims

A device for cleaning the inner surface of Neftekhim containing a hermetically sealed tubular conductive casing forming a working chamber, an electrode with a conductive tip is immersed in a conductive solution in the lower part of the working chamber, and a current-carrying cable, characterized in that the casing is made of a composite of parts, the device is equipped with a connecting cylinder part of the body that is installed inside the housing with the possibility of separating the cavity at the working and auxiliary chambers, in the auxiliary chamber placed electrode, the connecting head has channels for communication of the working chamber with the auxiliary and detachable insulated from her site under the electrodes, moreover, the electrode in the auxiliary chamber one end of which is connected with the current-carrying cable, the other end through the split node connecting the head with the electrode of the working chamber.

 

Same patents:

The invention relates to the field of oil production and is intended for cleaning tubing (tubing) from asphaltoresinparaffin deposits (ARPD) using a scraper plate type

The invention relates to the oil industry and can be used as equipment for secondary opening of productive formations in oil and gas wells for treatment of bottom-hole formation zone and for wells from mud, sand, wax, tar and other hard-to-wash deposits, as well as for overlapping wellbore

The invention relates to the oil industry

The invention relates to the oil industry and can be used in wells drilled in permafrost zones to prevent and eliminate wax and paraffin deposits in tubing (tubing)

The invention relates to subsurface equipment well designed to deliver solid reagent into the well and feeds it into the flow of the reservoir fluid

The invention relates to the oil and gas industry, in particular to a device for cleaning the bottom-hole zone

The invention relates to the oil industry, in particular, to a device for removing deposits of asphalt compounds with the inner surface of the lift pipes of wells equipped with electropherogram pumps and fountain

The invention relates to the oil industry and can be used for cleaning the bottom-hole zone and the bottom of a well from cuttings, sand, wax, tar and other hard-to-wash deposits, as well as in the secondary drilling formations in depression mode
The invention relates to the oil and gas industry, in particular to methods of intensification of the flow of hydrocarbon fluids in wells, reservoirs which kolmat wax and paraffin deposits deposits

The invention relates to the oil industry and can be used to prevent the formation of asphalt-maloperation deposits (ARPD) and metal corrosion in oilfield equipment

The invention relates to the oil industry and can be used in wells drilled in permafrost zones to prevent and eliminate wax and paraffin deposits in tubing (tubing)

The invention relates to the oil industry and allows you to maintain the estuarine valves water injection wells in a healthy state in the conditions of negative temperatures during planned and emergency stops pumping water, and by reducing the water level in the wells of the valve or in the fall capacity of the well

The invention relates to the oil and gas industry and is intended to eliminate hydrateparaffin plugs in oil and gas wells

The invention relates to the oil industry, in particular to a device for electroholography piping and valves mouth water injection wells system of reservoir pressure maintenance oil field

The invention relates to mining and can be used for heat treatment of the productive layer of high-viscosity oil recovery hydraulic connection of the reservoir to the well, to increase oil recovery and production rate of the well, and resuming operation of uneconomic wells for oil, natural gas, fresh, mineral and thermal water

The invention relates to the oil and gas industry and can be used for excitation of production and increasing the injectivity of injection wells and increase the impact of productive layers gazokondensatnyh and other deposits of liquid and gaseous minerals

The invention relates to the oil and gas industry, namely to the downhole electrical heating devices of the bottomhole zone Neftegazgeodeziya layer intended for treatment and improving the selection of oil and gas from the reservoir
The invention relates to the oil and gas industry, and in particular to methods of thermal elimination of paraffin and resin deposits with subsequent impacts on the bottomhole zone Neftegazgeodeziya reservoir

The invention relates to the exploitation of oil wells and can be used to eliminate them hydrated and parfenovitch tubes

FIELD: oil and gas industry.

SUBSTANCE: method includes lowering into well, to depth of forming of deposits, of linear heating element in form of pipes column in well or of metallic conductor and feeding conductor. Heating is performed by letting high-frequency electric current through feeding conductor while providing for its locking in head portion of heating system at depth of forming of deposits. Metal of linear heating element is effected with high-frequency field of feeding conductor. Frequency of electric current is set at lower limit on basis of condition, that depth of penetration of high-frequency field into metal of linear heating element was less than its thickness. Heat production is adjusted to provide primary heat production along linear heating element by decreasing space between the latter and feeding conductor and by increasing frequency of electric current from this lower limit. Locking of electric current in head portion of heating system between heating element and feeding conductor is performed through locking element, having falling dependence of resistance from temperature increase. Frequency of electric current is set at lower limit during lowering of heating system and is increased after passing whole depth of forming of deposits and obstructions. Locking of electric current in head portion of heating system can be performed through substance, having properties of weak electrolyte, for example, through well liquid, and frequency of electric current is increased in area of manifestation of effect of steep increase in its productiveness. Device has heating system, consisting of feeding conductor and linear heating element, and locker of electric current between these in its head portion. Feeding conductor is made of coiled and isolated conductors. Linear heating element is in form of column of pipes in the well or a bare metallic conductor. Cross-section of conductor is selected to be enough for supporting weight of heating system lowered into well. Electric current locker in head portion of heating system is made in form of winding of high-frequency wire, woven on ferrite core and placed inside metallic cover in such a way, that ferrite core by end portions is locked on this cover. Grade of ferrite of core is selected from condition, that its temperature of magnetic properties loss should exceed temperature of melting of deposits in a well, but is not greater than temperature of their combustion or carbonization. Current locker in head portion of heating system may be made in form of bare electrode, connected to feeding conductor and placed relatively to heating element in such a way, that between them a channel is formed along axis of bare electrode for passing of well liquid.

EFFECT: higher efficiency, higher reliability.

2 cl, 4 dwg

Up!