CN2171673Y

CN2171673Y - Automatic anti-blockage system without cable for oil extraction

Info

Publication number: CN2171673Y
Application number: CN 93219218
Authority: CN
Inventors: 侯戈文
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-07-21
Filing date: 1993-07-21
Publication date: 1994-07-13
Anticipated expiration: 2003-07-21

Abstract

The utility model relates to an automatic anti-blockage system without cable for oil extraction in oilfield, composed of a specific transducer 1, a thermostat 2, and a sensor 3 without power cables. The cable of the utility model is replaced by part an oil pipe 24 to supply electricity to every transducer. Insulating pup joints 4 of coupling type are arranged at the upper and the lower ends of the oil pipe 2 4, which causes the oil pipes outside the transducer area not to electrified. An insulating node 6 is arranged on a pumping rod 26 to ensure no conduction when the pumping rod 26 touches the oil pipe. An electric contactor 7 is arranged on the transducer 1 to connect a transducing device 9 with the oil pipe through an overcurrent protector 8. An electric contactor 10 connects ground end of the transducing device 9 with the inner wall of a jacket tube 25 through an elastic arm 11 to make up a working loop.

Description

Automatic anti-blockage system without cable for oil extraction

The utility model relates to a kind of oil field anti-blocking system of recovering the oil.

Most in the world diposits of petroleums all are rich in paraffin and pitch, because they can solidify, often stop up oil well during oil recovery, and for solving stifled well problem, the method that has adopted has: mechanical paraffin removal adds chemical viscosity reduction agent, steam in jection hot water deep fat, with heating cable etc.These methods are bothersome time-consuming, and influence is produced.Announced the oil recovery automatic block-resistant system of a patent No. ZL 92240758.4 in the Chinese patent communique, the transducer group of this system is by electricity cable transmission of electricity in parallel, this power supply mode and system architecture thereof are only limited under the bigger situation of oil well bore to be used, and uses with regard to some difficulty for small-bore oil well.

The purpose of this utility model is design and transforms this anti-blocking system, utilizes former oil pipe to replace cable, and be added with insulating part on oil pipe and sucker rod, changes the structure of transducer simultaneously and constitutes a new anti-blocking system of oil recovery.

The technical solution of the utility model is achieved in that it is to be made of the one group of transducer 1 in down-hole, ground temperature controller 2, sensor 3 and oil pipe 24, forms a closed-loop control system.The two ends, transducer distributed area of oil pipe 24 are provided with automatically controlled insulating short section 4; on the automatically controlled insulating short section 4 Explosion proof joint 23 is arranged; the output of temperature controller 2 directly is connected on the joint 23, and wherein transducer 1 is made up of body 12, energy transducer 9, hermetically sealed case 17, brace summer 15, felt pad 16, elastic arm 11, overcurrent protector 8 and electric contactor 7 and 10.Insulating short section 4 is made up of last oil connection 18, following oil connection 19, power transition box 20 and felt pad 21 and 22.

Description of drawings of the present utility model is as follows:

Fig. 1 is an oil recovery automatic block-resistant entire system structural representation

Fig. 2 is the transducer architecture sketch in the utility model

Fig. 3 is an oil pipe insulating short section schematic diagram in the utility model

Fig. 4 is the insulation node schematic diagram on the sucker rod in the utility model

In conjunction with Figure of description 1-4 structure of the present utility model and principle thereof are described in further detail.

This system shown in Figure 1 is by the one group of transducer 1 in down-hole, compositions such as ground temperature controller 2, sensor 3.The output of temperature controller 2 directly is connected on the Explosion proof joint 23 on the insulating short section 4 of oil pipe 24, utilize the unilateal conduction characteristics of insulating short section 4, under the uncharged condition of ground oil pipe, part oil pipe 24 can replace the effect of power cable, each transducer 1 transmission of electricity in parallel to this zone.Oil well casing 25 is connected formation work loop as the ground end elastic arm 11 of ground wire and transducer 1.Sensor 3 is one can bear the thermocouple of high pressure, inserts in the oil-out of ground.Measured signal feedback is relatively exported a voltage difference in the back to the analog quantity of temperature controller 2 and preset temperature.When the oil-out temperature was low, voltage difference was bigger, can drive relay switch to each transducer feed.When the oil-out temperature was higher, voltage difference was less, and relay switch turn-offs, and stops feed.Transducer 1 shown in Figure 2 is a coupling type, and it can connect oil pipe up and down, replaces the tubing coupling effect, power frequency normal pressure electric energy can be converted to heat energy again, to up oil stream makeup energy, the molten wax effect of significant viscosity reduction is arranged.Be provided with in the transducer body 12 and the corresponding passage of flow string, there is taper female threads at two ends, in order to connect oil pipe up and down.There is annular groove body 12 outsides, in order to encapsulation energy transducer 9.Wherein energy transducer 9 is divided into three layers, and first floor is an insulating layer; The second layer is a crystal semiconductor layer; The 3rd layer is heat insulation layer.The effect of first floor is with semiconductor crystal and body 12 insulation; Second layer semiconductor crystal can be converted into power frequency normal pressure electric energy the heat energy of the oil stream that rises, and the thermal efficiency can reach more than 85%; The 3rd layer is heat insulation layer, can further improve its thermal efficiency, and there is hermetically sealed case 17 energy transducer 9 outsides, makes axial restraint with flange on the body 12 and double nut, and pin 13 is done circumferentially fixing.Rubber ring 14 is made sealing usefulness, protects transducer like this under the situation of subsurface environment condition difference, improves reliability.Overcurrent protector 8 is contained in the sealed tube, and an end stretches into energy transducer 9 and contacts, and another termination electric contactor 7 electrically contacts with oil pipe 24 again.If arbitrary transducer short circuit, overcurrent protector 8 disconnects, and system is formed protection, and other transducers are work as usual.Hermetically sealed case 17 outside welds are connected to three axial brace summers 15, are connected with felt pad 16 and elastic arm 11 on each brace summer 15.Elastic arm 11 is by felt pad 16 and brace summer 15 electric insulations, but and the ground end of energy transducer 9 by contactor 10 electrical connections.Utilize the favorable elasticity of elastic arm 11, the inwall in the down-hole with sleeve pipe 25 contacts, so that form the work loop of transducer.A bite well needs the quantity and the distribution form of transducer, by the decision that needs of oil well.Oil pipe insulating short section 4 shown in Figure 3 is by last oil connection 18, following oil connection 19, power transition box 20, felt pad 21 and 22, and temperature controller output line Explosion proof joint 23 is formed.Last oil connection 18 and following oil connection 19 have oil flow channel, and tapered thread is in order to connect the pipeline that recovers the oil up and down.Explosion proof joint is distolateral following oil connection 19, and the output termination of temperature controller 2 requires sealing explosion-proof on it.If oil pipe insulating short section 4 be provided in a side of the down-hole be the transducer distributed area below, then do not need the quick-fried joint of setting up defences.The requirement that felt pad 21 and 22 material and thickness mainly satisfy power and dielectric strength.Power transition box 20 is that the power with last oil connection 18 passes to down oil connection 19 and keeps both mutually insulateds simultaneously.Shown in Figure 4, the insulation node 6 on the sucker rod, its form of structure is intended mutually with conventional rod collar, and different is that it adopts high-strength insulating material for example carbon fiber or glass fiber reinforced plastic.Two other screwed hole is isolated with insulation materials mutually, and making lower sucker rod is electric insulation after connection.

Claims

1, a kind of oil recovery automatic block-resistant system, it is characterized in that it is to be made of transducer group (1), temperature controller (2), senser element (3) and conduction oil pipe (24), form a closed-loop control system, two ends, transducer distributed area at the conduction oil pipe are provided with automatically controlled insulating short section (4), Explosion proof joint (23) is arranged, the upper and lower insulation node (6) of respectively establishing of the sucker rod (26) in the oil pipe on the automatically controlled insulating short section.

2, oil recovery automatic block-resistant according to claim 1 system is characterized in that described transducer (1) is made up of body (12), energy transducer (9), hermetically sealed case (17), brace summer (15), felt pad (16) and elastic arm (11), overcurrent protector (8), electric contactor (7,10).

3, oil recovery automatic block-resistant according to claim 1 system is characterized in that described automatically controlled insulating short section (4) is by last oil connection (18), oil connection (19), power transition box (20), felt pad (21,22) are formed down.