CN2145858Y

CN2145858Y - Electrothermal pumping unit

Info

Publication number: CN2145858Y
Application number: CN 93203370
Authority: CN
Inventors: 项蜀中; 王小虎; 费国兴; 华玉宝; 盛曾顺; 温成良; 胡九章
Original assignee: PETROLEUM MACHINERY PLANT DAGANG PETROLEUM ADMINISTRATION
Current assignee: PETROLEUM MACHINERY PLANT DAGANG PETROLEUM ADMINISTRATION
Priority date: 1993-02-22
Filing date: 1993-02-22
Publication date: 1993-11-10
Anticipated expiration: 2003-02-22
Also published as: RU2088754C1

Abstract

The utility model discloses an electrically heated pumping unit used for exploiting crude oil of high coagulant, high viscosity and high contained wax. The utility model causes a whole cable to penetrate into a cable pipe through a suspension joint device. When a cable head is inserted into a terminator made of conducting materials, a power supply circuit is formed by the terminator. Thus, the electrical energy supplied by an external power supply is changed into the heat energy required by heating the crude oil. The utility model has the advantages of simple structure, convenient operation, long service life and high reliability.

Description

Electrothermal pumping unit

The utility model relates to the hot extractor of a kind of Gao Ning of exploitation, high sticking, high wax-bearing crude, relates in particular to a kind of electrically heated oil rig of using.

The quarrying apparatus of viscous crude and high-viscosity oil is in the research and discovery stage always in the oil exploitation process at present, because this quasi-oil is 600-1500 rice interval under the surface layer of flowing through, because formation temperature successively decreases, cause crude oil temperature to descend, seriously influenced flowability, not only increase the load of mining equipment, and influenced crude output, taked the method for additional heating to compensate this portion temperature loss usually.

Heating means commonly used comprise medium heating (for example with steam or hot water heating) and electrical heating method, and the branch of electrical resistance heating and skin current heating is arranged again in the Electric heating.

Skin current heating or SECT method are a kind of novel pipeline heating systems that the mid-1960s occurs, because this heating system is simple in structure, safe and reliable, the life-span is long, is easy to automation, and the energy utilization rate height, thereby day by day obtain paying attention to and using.

But it is split type that the oil rig of existing employing skin current heating is, its structure be in process of production the cable piecewise is preset at hollow section (below be called cable conduit, pipe range is generally in 0.5～8m), the pipe two ends are respectively equipped with joint and box cupling.During underground work, need first pipe put into well, mention slightly then.Again second pipe and first pipe are spun, the pipe inner cable can be fused, so order is connected to the length of design mutually, but there is following shortcoming in this structure, and cable need be preset in the cable conduit, cable segment connector all adopts resistant to elevated temperatures polytetrafluoroethylene (PTFE), thereby processed complex, the cost height, What is more, desire is connected into designed length with cable conduit needs about 120 plug connectors, can not power as one of them plug connector then whole mouthful of well that break down.This in addition structure repeats, and usability is poor, and the life-span is short.

Task of the present utility model is that a kind of practical new-type skin current heating oil rig will be provided, this device can overcome above-mentioned shortcoming, and install simple, simplified underground work, and folding and unfolding cable at the scene, saved hand labour complicated in the manufacturing process and can be repeatedly used, this in addition new-type structure can also reduce cost life-saving.

The technical scheme of finishing task of the present utility model is: routinely after the underground work, on the oil pump plunger piston bar, adorn one and become nipple, this the other end and a terminal organ join, successively the unit cable pipe is connect then and put into oil pipe, until design length, whole cable connects device and penetrates in the cable conduit by outstanding, when cable head inserts terminal organ, spring terminal cover in the terminal organ contacts by the conical surface with the terminals that are connected with cable, constitute current supply circuit, weld a lead-in wire at the outstanding inner surface that connects device, link to each other with zero line in the switch board, cable is also drawn the device and is linked to each other with the live wire of switch board from hanging to connect.

Preferably the external diameter of cable conduit is 30～38mm, and internal diameter is 18-26mm, and joint length is 0.5～9.5m, cable conduit one termination is a gas thread, thread root is provided with the two seals groove, and the cable conduit other end is the box cupling that matches with gas thread, and the end of box cupling is provided with the ring packing section.

In a preferred embodiment, above-mentioned seal groove is " O " type.

In another preferred embodiment, the outstanding upper end that connects device be provided with short solid hopkinson bar on the standard thread that matches of screw thread, the outstanding device lower end that connects connects cable conduit locking with locking nut, and is loosening to prevent cable conduit.

Used cable can be the heatproof flexible cable that steel wire and multiply copper cash are hinged to form in this device, and its steel wire diameter is that 0.8～1.2mm brass wire diameter is that 0.4～0.6mm conductive section is 20～35mm ²Temperature pick up can connect device and is inserted in the cable conduit through outstanding, and its lead-in wire is drawn in the lump with cable.

Below in conjunction with accompanying drawing the utility model is described in detail, wherein:

Fig. 1 is the oil pumping system schematic diagram that electrically heated pumping unit of the present utility model and supporting oil recovery machiner are formed.

Fig. 2 is the sectional drawing of a cable conduit among Fig. 1;

Fig. 3 is the outstanding sectional drawing that connects device among Fig. 1;

Fig. 4 is the sectional drawing of the terminal organ among Fig. 1.

As shown in Figure 1, in sleeve pipe (8), be with oil pipe (7) coaxially, the upper end that oil layer section is equipped with the solid hopkinson bar (11) that oil well pump (13) links to each other with the plunger (12) of oil well pump (13) in oil pipe (7) is equipped with and is become nipple (10), the upper end that becomes nipple (10) links to each other with terminal organ (9), then (6) ground of cable conduit are connected successively and insert coaxially in the oil pipe (7), until design length, oil well pump (13) is evacuated to oil in the space between cable conduit (6) and the oil pipe (7).

As shown in Figure 2, cable conduit comprises the body of rod (20), bar head (19) and box cupling (21).The body of rod is preferably selected the high-strength alloy seamless steel pipe for use, its diameter is 30～38mm, one end and bar head (19) welding, the other end and box cupling (21) welding, each several part interconnects the back endoporus and should be equal diameter, bar head thread root has twice " O " type seal grooves (22), and the end of box cupling (21) is provided with the ring packing section.

Cable (5) by special-purpose winch in guide wheel device penetrates cable conduit (6), after inserting terminal organ (9), cable socket promptly finishes the cable work of wearing, referring to Fig. 4, terminal organ (9) is made by the fabulous material of conduction, be provided with spring terminal cover (18) in the end that terminal organ (9) and cable conduit (6) join, link to each other with change nipple (10) by the other end that the conical surface keeps well contacting terminal organ (9) mutually with the termination of cable (5).

Hang and connect the below (referring to Fig. 1) that device (2) is connected on solid hopkinson bar (1), as shown in Figure 3, outstanding device (2) upper end that connects is processed with standard thread, with with solid hopkinson bar (1) on the screw thread outstanding lower end that connects device (2) that matches positioning key is housed, by locking nut (17) the outstanding lower end that connects device (2) is linked to each other with cable conduit (6), loosening to prevent cable conduit (6).Outstanding inner surface welding one lead-in wire that connects device (2); link to each other with the zero line in the electrical power control cabinet (14); cable is also drawn from outstanding connecing the device; and link to each other with live wire in the electrical power control cabinet (14), a junction box is provided with the anti-cable bending of waterproof with line outlet protective sleeve (16) has been installed in the outstanding device side that connects.

Temperature pick up (4) penetrates to projected depth from the outstanding junction box that connects device (2) and draws in the lump with cable.

The utility model is because cable is that integral body is packed into, thereby installation is simple, only needs a terminal organ just can constitute current supply circuit with whole system, save the plug connector of cost costliness greatly, reduced intermediate connecting ring joint thereby increase the service life, improved functional reliability, simplified underground work

Obviously, embodiment described above only is the description to an example of the present utility model, and the ordinary skill of this area can also be used all changes in claims of the present utility model scope required for protection.

Claims

1, a kind of electrically heated pumping unit it comprise oil pipe (7) with the coaxial setting of sleeve pipe (8), oil layer section in the oil pipe (7) is equipped with oil well pump (13), the upper end of oil pump plunger piston bar (11) is equipped with and is become nipple (10), it is characterized in that the upper end that becomes nipple (10) links to each other with an end of terminal organ (9), the other end of terminal organ (9) links to each other with the cable conduit (6) of foot, a whole cable (5) connects device (2) and penetrates in the cable conduit (6) by outstanding, and the above-mentioned outstanding lower end that connects device (2) links to each other with the cable conduit (6) of topmost; After terminal organ (9) is inserted in the termination that cable is made by conductive material, constitute current supply circuit by terminal organ (9), thereby will change the required heat energy of heating in crude oil into by the electric energy that external power source provides.

2, electrically heated pumping unit as claimed in claim 1 is characterized in that: an end of a lead-in wire is welded in the above-mentioned outstanding inner surface that connects device (2), and the other end links to each other with zero line in the electrical power control cabinet (14).Connect the cable (5) that device (2) draws and link to each other from outstanding, so that power to above-mentioned current supply circuit with the live wire of electrical power control cabinet (14).

3, electric heater unit as claimed in claim 1 or 2, it is characterized in that: above-mentioned cable conduit (6) comprises an end and bar head (19) welding of the body of rod (20), bar head (19) and box cupling (21) body of rod (20), the other end and box cupling (21) welding, internal diameter was an equal diameter after each several part linked to each other, bar head (19) thread root has seal groove (22), and the end of box cupling is provided with the ring packing section.

4, requiring 3 described electrically heated pumping units as right, it is characterized in that: the external diameter of the above-mentioned body of rod (20) is 30～38mm, and internal diameter is 18～26mm, and joint length is 0.5～9.5m.

5, electrically heated pumping unit as claimed in claim 3 is characterized in that: above-mentioned bar head (19) thread root has twice " O " type seal grooves (22).

6, electrically heated pumping unit as claimed in claim 1 or 2, it is characterized in that: above-mentioned hanger (2) upper end is processed with the standard thread that the screw thread with solid hopkinson bar (1) matches, positioning key is equipped with in the outstanding lower end that connects device (2), by nut (17) the outstanding lower end that connects device (2) is linked to each other with cable conduit (6).

7, electrically heated pumping unit as claimed in claim 3, it is characterized in that: the above-mentioned outstanding standard thread that device (2) upper end is processed with and the screw thread of solid hopkinson bar (1) matches that connects, positioning key is equipped with in the outstanding lower end that connects device (2), by nut (17) the outstanding lower end that connects device 2 is linked to each other with cable conduit (6).

8, electrically heated pumping unit as claimed in claim 1 or 2: it is characterized in that above-mentioned terminal organ (9) made by the good material of conduction, be provided with spring terminal cover (18) in the end that terminal organ (9) and cable conduit (6) join.

9, electrically heated pumping unit as claimed in claim 3: it is characterized in that above-mentioned terminal organ (9) made by the good material of conduction, be provided with spring terminal cover (18) in the end that terminal organ (9) and cable conduit (6) join.

10, electrically heated pumping unit as claimed in claim 1 or 2, it is characterized in that: above-mentioned cable (5) is the heatproof flexible cable that steel wire or multiply copper cash are hinged to form, and its steel wire diameter is that 0.8～1.2mm brass wire diameter is that 0.4～0.6mm conductive section is 20～35mm ²

11, electrically heated pumping unit as claimed in claim 1 or 2 is characterized in that: temperature pick up (4) is connect device (2) and is inserted in the cable conduit (6) through outstanding, and its lead-in wire is drawn in the lump with cable.