CN101876240A

CN101876240A - Fully automatic oil extraction equipment

Info

Publication number: CN101876240A
Application number: CN 201010211186
Authority: CN
Inventors: 陈学东; 韩斌; 付智春; 曾理湛; 周小稀
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 2010-06-28
Filing date: 2010-06-28
Publication date: 2010-11-03
Anticipated expiration: 2030-06-28
Also published as: CN101876240B

Abstract

The invention discloses fully automatic oil extraction equipment. The equipment has the following structure that: a wire rope is connected with a wire rope reel and a hanging ring respectively; the wire rope is changed to move vertically after passing a guide wheel; a support of the guide wheel is connected with a flange through a load transducer; the centre of the flange is provided with a sealing mechanism; an oil discharge cross tee is connected with the flange and a gas discharge tee respectively; the gas discharge tee is connected with another flange; the flange is connected with the upper end of an oil well casing; oil liquid passes through the cross tee and flows out of an oil port; an oil extraction cylinder is positioned in the oil well casing; the outer side of the oil extraction cylinder is provided with a centralizer, while a bottom part is provided with a hanging ring support and a one-way valve; the hanging ring is connected with the wire rope; an oil outlet pipe is connected and communicated with the gas discharge tee; and the bottom of the oil outlet pipe is provided with the one-way valve and a piston. The equipment has the advantages of simple structure, reliable work, fully automatic work, simple and convenient operation, simple maintenance, casing oil extraction, no need of oil pipes or derricks, no damage to oil wells, no need of periodic pump inspection and well repair and the suitability for the long-term stable oil extraction production of shallow wells and low-production wells.

Description

A kind of fully automatic oil extraction equipment

Technical field

The invention belongs to the oil production equipment of oil field oil recovery production usefulness, particularly relate to a kind of fully automatic oil extraction equipment.

Background technology

The oil recovery production for oil field shallow well, stripper well at present mainly contains two classes: sucker rod pumping and drag for oily formula and recover the oil.

The sucker rod pumping system puts into oil pipe in sleeve pipe, be lowered to oil well pump afterwards again in oil pipe, links to each other with the oil pumper on ground by the piston of sucker rod with oil well pump, and not only initial investment is big, but also needs inspection pump well workover regularly, maintenance cost height.

Drag for oily formula and recover the oil that main at present what use is swab, its structure is based on all that the ball-and-seat lifting principle development of oil testing swab comes.To down-hole liquid level after, open down by ball-and-seat for swab, goes up the bailing barrel oil pump behind the descending again segment distance, close under the pressure of ball-and-seat fluid column above conducting oneself with dignity with it, the swab peripheral seal member seals with pit shaft under the pressure of fluid column simultaneously, and liquid can not pass through, thereby is arrived ground by bailing.Have following defective in using at the scene: bailing efficient is not high; The rubber wearing and tearing are big, and the life-span is limited; Can produce negative pressure in the down-hole, oil well is caused damage.

Summary of the invention

The objective of the invention is in order to overcome above-mentioned deficiency, recover the oil from the oil field that it is actual to produce, designed a kind of fully automatic oil extraction equipment, this equipment have fully automatic working, easy and simple to handle, safeguard characteristic of simple.

A kind of fully automatic oil extraction equipment provided by the invention is characterized in that this equipment comprises steel-cable controller, wire rope, directive wheel, load transducer, sealing mechanism, first, second flange, oil extraction four-way, blow-off tee, oil well casing, centralizer, oil tube, flowline, first, second one way valve, piston, suspension ring, and suspension ring bearing;

The structure of steel-cable controller is: motor, reducer and cable drum all are fixed on the pedestal, motor is connected by first shaft coupling with reducer, reducer is connected by second shaft coupling with cable drum, motor rotate and reverse the rotation of controlling cable drum; Rotary encoder is fixedlyed connected with cable drum is coaxial; Strand oscillator is installed in the place ahead of cable drum, the steel wire penetrating strand oscillator;

Wire rope one end is fixed on the cable drum, and the other end is connected with suspension ring by directive wheel, and wire rope is changed into the motion of vertical direction after by directive wheel; Be connected by load transducer between the bearing of directive wheel and the flange;

The center of flange is equipped with a sealing mechanism, and sealing mechanism is the column chamber, adopts the packing seal mode, and sealing mechanism is coaxial with the hole on first flange, the steel wire penetrating sealing mechanism; The two ends of oil extraction four-way are connected with blow-off tee with first flange respectively; The blow-off tee lower end is connected on second flange, and flange is connected with the oil well casing upper end; Blow-off tee communicates with flowline, and the oil extraction four-way is provided with oil-out, and the fluid in the flowline is flowed out by oil-out by the oil extraction four-way;

Oil tube is positioned at oil well casing, and diameter is greater than flowline and less than oil well casing, and the oil tube outside at two ends up and down is equipped with centralizer;

The bottom of oil tube is equipped with suspension ring bearing and one way valve, and suspension ring are connected with the suspension ring bearing, and suspension ring are connecting wire rope, and the moving up and down of wire rope driving oil tube and moving up and down;

The flowline upper end is fixed on the blow-off tee, and the caliber of flowline is less than the caliber of oil tube; The bottom of flowline is equipped with the one way valve that can only flow to fluid, and in the bottom pipe of flowline piston is installed.

The beneficial effect of fully automatic oil extraction equipment of the present invention is: simple in structure, reliable operation, fully automatic working, easy and simple to handle, safeguard simple, Casing for extracting oil, do not need oil pipe, derrick, oil well there is not any infringement, do not need regularly to examine the pump well workover, be specially adapted to the oil recovery production of shallow well, stripper well long-term stability.

Description of drawings

Fig. 1 is the structural representation of fully automatic oil extraction equipment provided by the invention;

Fig. 2 is a steel-cable controller structure chart among Fig. 1;

The specific embodiment

Below by by embodiment and accompanying drawing the present invention being described in further detail, but following examples only are illustrative, and protection scope of the present invention is not subjected to the restriction of these embodiment.

As shown in Figure 1, equipment provided by the invention comprises steel-cable controller 1, wire rope 2, directive wheel 3, load transducer 4, sealing mechanism 5, first,

second flange

6,9, oil extraction four-way 7, blow-off tee 8, oil well casing 10, centralizer 11, oil tube 12, flowline 13, first, second one

way valve

14,18, piston 15, suspension ring 16, and suspension ring bearing 17.

As shown in Figure 2, the structure of steel-cable controller 1 is: motor 19 is connected by first shaft coupling 20 with reducer 21, and reducer 21 is connected by second shaft coupling 22 with cable drum 23, motor 19 rotate and reverse the rotation of controlling cable drum 23.Rotary encoder 24 and cable drum 23 coaxial fixedlying connected make rotary encoder 24 and cable drum 23 rotate synchronously, can monitor the rotational angle of cable drum 23, i.e. the length of wire rope motion.Strand oscillator 25 is installed in the place ahead of cable drum 23, and steel wire penetrating strand oscillator 25 can make wire rope clocklike twine on cable drum by the motion of controlling strand oscillator 25.Pedestal 26 is supporting above overall structure.

Wire rope 2 one ends are connected with cable drum 23, and the other end is connected with suspension ring 16 by directive wheel 3, and wire rope 2 is changed into the motion of vertical direction after by directive wheel 3.Be connected the bearing reaction of load transducer 4 energy measurement directive wheels 3 by load transducer 4 between the bearing of directive wheel 3 and the flange 6.

The center of flange 6 is equipped with a sealing mechanism 5, and sealing mechanism 5 is the column chamber, adopts the packing seal mode, wraps up the wire rope 2 that moves up and down fully.Sealing mechanism 5 is coaxial with the hole on first flange 6, and wire rope 2 passes sealing mechanism 5.When drawing high wire rope 2, sealing mechanism 5 can stop the outflow of fluid.The two ends of oil extraction four-way 7 are connected with blow-off tee 8 with first flange 6 respectively.Blow-off tee 8 lower ends are connected on second flange 9, and flange 9 is threaded with oil well casing 10 upper ends.Flowline 13 links to each other with blow-off tee 8, and the side of oil extraction four-way 7 is an oil-out, and the fluid in the flowline 13 flows out by oil extraction four-way 7 and by oil-out.

Oil tube 12 is positioned at oil well casing, diameter is greater than flowline 13, the outside at oil tube two ends about in the of 12 is equipped with centralizer 11, when oil tube 12 moves in oil well casing 10, centralizer 11 can guarantee that oil tube 12 is in the central authorities of oil well casing 11 all the time, avoids the direct collision of oil tube 12 and oil well casing 10 or stuck.

The bottom of oil tube 12 is equipped with suspension ring bearing 17 and one way valve 18, and suspension ring 16 and suspension ring bearing 17 adopts bolts to be connected, and suspension ring 16 are connecting wire rope 2, and the moving up and down of wire rope 2 driving oil tube 12 and moving up and down.The one way valve 18 that is installed in oil tube 12 bottoms is realized the one-way flow of fluid, and promptly fluid can only flow to oil tube 12 by one way valve 18, but can not flow out.

The caliber of flowline 13 is less than the caliber of oil well casing 10 and oil tube 12.The bottom of flowline 13 is equipped with the one way valve 14 that can only flow to fluid, and in the bottom pipe of flowline 10 piston 15 is installed.

During this device work, motor 19 first low speed just change, oil tube 12 is slowly transferred, and motor 19 just changes at a high speed afterwards, and oil tube 12 is transferred fast, at oil tube 12 two ends upper and lower centralizer 11 is housed, suitable gap is arranged between the centralizer 11 and the borehole wall, both can guarantee that oil tube 12 is vertical substantially, can guarantee that again oil tube 12 jam can not take place in well, even borehole wall generation micro-strain, oil tube 12 also can transfer smoothly with on carry; When treating that oil tube 12 is transferred to the down-hole liquid level, the load on the wire rope 2 changes, and detects this variation by load transducer 4, and send it to control cabinet, oil tube 12 is transferred a segment distance more afterwards, to guarantee that oil tube 12 is submerged in the liquid fully, stops motor 19; Oil tube 12 is statically placed in the liquid, and the external and internal pressure official post gets the one way valve 18 of bottom and opens, and accelerating liquid enters the speed of oil tube 12; After waiting to leave standstill certain hour, motor 19 high speed reverse rotation are carried oil tube 12 on fast, and the one way valve 18 of oil tube 12 bottoms is closed; Can detect the position of oil tube 12 in well in real time by rotary encoder 24, when oil tube 12 during near flowline 13 bottoms, motor 19 slows down, become low speed and reverse, oil tube 12 is inserted in rubber piston 15 safely and smoothly, fluid backs down the one way valve 14 of fixed piston 15 bottoms simultaneously, and the fluid in the oil tube 12 is drawn from oil extraction four-way 7 by flowline 13; Afterwards motor 19 once more low speed just change the next work period of beginning.

As there being gas to produce in the well, can draw by the blow-off tee 8 of well head.

The above only is preferred embodiment of the present invention, is not structure of the present invention is done any pro forma restriction.Every foundation technical spirit of the present invention all still belongs in the scope of technical scheme of the present invention any simple modification, equivalent variations and modification that above embodiment did.

Claims

1. a fully automatic oil extraction equipment is characterized in that, this equipment comprises steel-cable controller (1), wire rope (2), directive wheel (3), load transducer (4), sealing mechanism (5), first, second flange (6,9), oil extraction four-way (7), blow-off tee (8), oil well casing (10), centralizer (11), oil tube (12), flowline (13), first, second one way valve (14,18), piston (15), suspension ring (16), and suspension ring bearing (17);

The structure of steel-cable controller (1) is: motor (19), reducer (21) and cable drum (23) all are fixed on the pedestal (26), motor (19) is connected by first shaft coupling (20) with reducer (21), reducer (21) is connected by second shaft coupling (22) with cable drum (23), motor (19) rotate and reverse the rotation of controlling cable drum (23); Rotary encoder (24) and coaxial the fixedlying connected of cable drum (23); Strand oscillator (25) is installed in the place ahead of cable drum (23), steel wire penetrating strand oscillator (25);

Wire rope (2) one ends are fixed on the cable drum (23), and the other end is connected with suspension ring (16) by directive wheel (3), and wire rope (2) is changed into the motion of vertical direction after by directive wheel (3); Be connected by load transducer (4) between the bearing of directive wheel (3) and the flange (6);

The center of flange (6) is equipped with a sealing mechanism (5), and sealing mechanism (5) is the column chamber, adopts the packing seal mode, and sealing mechanism (5) is coaxial with the hole on first flange (6), and wire rope (2) passes sealing mechanism (5); The two ends of oil extraction four-way (7) are connected with blow-off tee (8) with first flange (6) respectively; Blow-off tee (8) lower end is connected on second flange (9), and flange (9) is connected with oil well casing (10) upper end; Blow-off tee (8) communicates with flowline (13), and oil extraction four-way (7) is provided with oil-out, and the fluid in the flowline (13) enters oil extraction four-way (7) by blow-off tee (8) and flowed out by oil-out;

Oil tube (12) is positioned at oil well casing, and diameter is greater than flowline (13) and less than oil well casing, and oil tube (12) outside at two ends up and down is equipped with centralizer 11;

The bottom of oil tube (12) is equipped with suspension ring bearing (17) and one way valve (18), and suspension ring (16) are connected with suspension ring bearing (17), and suspension ring (16) are connecting wire rope (2), and the moving up and down of wire rope 2 driving oil tube (12) and moving up and down;

Flowline (13) upper end is fixed on the blow-off tee (8), and the caliber of flowline (13) is less than the caliber of oil tube (12); The bottom of flowline (13) is equipped with the one way valve (14) that can only flow to fluid, and in the bottom pipe of flowline (10) piston (15) is installed.