CN201180524Y

CN201180524Y - System used for oil well horizontal sand pumping

Info

Publication number: CN201180524Y
Application number: CNU2008200799052U
Authority: CN
Inventors: 曲洪坤; 陈蔚鸿; 张永华
Original assignee: Anton Oilfield Services Group Ltd
Current assignee: Anton Oilfield Services Group Ltd
Priority date: 2008-04-11
Filing date: 2008-04-11
Publication date: 2009-01-14
Anticipated expiration: 2018-04-11

Abstract

The utility model relates to the petroleum machinery technical field, in particular to a system for horizontal bailing of an oil well. In order to solve the leak tightness problem of a ball-and-seat in the prior bailing process, the friction problem of the pump body of a sand bucket and a sleeve and a collar, and the cleaning problem of the residual sand on the inner wall of the sleeve, the utility model provides a system for horizontal bailing of the oil well. A liquid discharge hole is arranged on the upper part of a piston rod on a vertical section of a sand bucket; an upper valve is arranged on the piston rod; a horizontal section of the sand bucket from a sand settling pipe to the other end is provided with a piston barrel, a hard piston, a soft piston, a sand stopping nipple and a sand cutting and sand pushing tool in turn; a centralizer is arranged on the pump body of the horizontal section; and the other end of the sand cutting and sand pushing tool is provided with a bottom valve and a sand shovel. The system has the advantages that the system has good leak tightness, small friction of the sand bucket and the sleeve and the collar and long service life, and effectively guarantees that a large quantity of sand grains can not enter the piston barrel, the sand pumping capacity of the piston is strong and the work efficiency is high.

Description

A kind ofly be used for the system that the oil well level is dragged for sand

Technical field

The utility model relates to the petroleum machinery technical field, is specifically related to a kind of system that the oil well level is dragged for sand that is used for.

Background technology

In the Oilfield developing process, because loose sand formation cementation intensity is low or the influence of pressing crack construction, sand grains can flow into pit shaft along with formation fluid, causes pit shaft obstruction, down-hole string, instrument and ground installation wearing and tearing aggravation, and causes the oil well reduce or stop production.Generally speaking, adopt water circulation to carry method, the long-pending sand of pit shaft is broken up and take ground to by swiftly flowing liquid.Because the requirement of compatibility, density and the viscosity on sand cleaning fluid and stratum, this sand washing mode very easily cause formation contaminant and ground environment to pollute; For the bigger oil well of formation leakage amount, the hydraulic sand washing mode has certain degree of difficulty, can not finish the sand washing operation sometimes, and the job execution cycle is long, and down-hole accident easily takes place, and the work operations amount is bigger, the cost height.Conventional sand washing process is difficult for going out sand grains, and oil reservoir is polluted; And mechanical sand bucket is according to the operating principle of oil well pump, its power is working rig, the oil pipe on sand bucket top is as the line shaft of plunger, the bottom sand sediment pipe is as storage sand pocket, according to the height of sand post, the length of decision storage sand oil pipe, handling oil pipe up and down, directly sand is extracted in the storage sand oil pipe, finishes and drag for the sand operation.When strata pressure is low, oil reservoir is missed when serious, and this technology has bigger advantage.The restriction on the design feature but machinery drags for sand technology, the present range of application of this technology only is confined to Vertical Well, can't directly use horizontal well.

Summary of the invention

In order to solve the existing sealing problem that drags for ball-and-seat in the sand technology, friction problem between the pump housing of sand bucket and sleeve pipe and the box cupling, cleaning problem attached to the residual sand on the internal surface of sleeve pipe, and in taking out the sand process, sand liquid stops up the problem of sand pump and last valve, and the utility model provides a kind of system that the oil well level is dragged for sand that is used for, and has improved the efficient of dragging for sand, and desanding is thorough, not polluted reservoir.

In order to achieve the above object, the technical solution adopted in the utility model is: a kind ofly be used for the system that the oil well level is dragged for sand, be provided with outage above the piston rod of the vertical section of sand bucket, piston rod is provided with valve; On the sand bucket horizontal segment, from the sand sediment pipe to the other end, be provided with piston cylinder successively, be provided with hard piston, soft piston, sand block short circuit, broken sand behind the piston cylinder and push away the sand instrument, on the horizontal segment pump housing, be provided with the instrument of setting upright, the other end that pushes away the sand instrument at broken sand is provided with bottom valve and sand shovel, and the horizontal sand that is combined into of bottom valve and sand shovel shovels.

Above-mentioned upward valve is common ball-and-seat, and bottom valve is the ball-and-seat that resets that leads, and described bottom valve valve interior wall upper edge valve body is axially arranged with three grooves, plays guiding and resets.

Bead in the above-mentioned bottom valve is the bakelite ball.

The above-mentioned instrument of setting upright is rubber centralizer or rolling wheel centralizer.

Compared with prior art, the beneficial effects of the utility model are:

The utility model good airproof performance, the friction between sand bucket and sleeve pipe and the box cupling is few, and long service life effectively guarantees can not enter a large amount of sand grains in the piston cylinder, and the sand ability of taking out of piston is strong, high efficiency.

Description of drawings

Fig. 1 is the utility model overall structure schematic diagram;

Fig. 2 is the structural representation of horizontal sand shovel in the utility model;

Fig. 3 is the cross-sectional view of the utility model bottom valve valve body.

Reference numeral:

The 1-outage, the 2-piston cylinder, the 3-piston rod, the last valve of 4-, the hard piston of 5-, the soft piston of 6-, the 7-sand sediment pipe, 8-sand block short circuit, the broken sand of 9-pushes away the sand instrument, and 10-sets upright instrument, 11-bottom valve, 12-sand shovel, 13-groove, 14-bead, 15-power oil pipe.

The specific embodiment

Below in conjunction with accompanying drawing, structure of the present utility model is done detailed description.

Referring to Fig. 1, the utility model provides a kind of system that the oil well level is dragged for sand that is used for, and is provided with outage 1 above the vertical section of sand bucket, and the outage below is provided with piston rod 3, and piston rod 3 is provided with valve 4; On the sand bucket horizontal segment,, be provided with piston cylinder 2, hard piston 5, soft piston 6, sand block short circuit 8, broken sand successively and push away sand instrument 9 to the other end from sand sediment pipe 7, on the horizontal segment pump housing, be provided with the instrument of setting upright 10.The well liquid that comes in 8 pairs of pumping of sand block short circuit filters, and can guarantee can not enter a large amount of sand grains in the piston cylinder; Broken sand pushes away sand instrument 9 and the sand grains on the internal surface of sleeve pipe can be scraped off, and simultaneously transfers in the process residual sand shifted onto at the pipe string and inhales the sand mouth; Set upright instrument 10 can reduce sand bucket last put put in and friction between sleeve pipe and the box cupling, increase the service life.The other end that pushes away sand instrument 9 at broken sand is provided with bottom valve 11 and sand shovel 12, and the horizontal sand that is combined into of bottom valve 11 and sand shovel 12 shovels.

Referring to Fig. 2 and Fig. 3, going up valve 4 in the utility model is common ball-and-seat, bottom valve 11 is the ball-and-seat that resets that leads, described bottom valve 11 valve interior wall upper edge valve bodies are axially arranged with three grooves 13, under the situation of dependable flow, play guiding and reset, the bead 14 in the bottom valve is the bakelite ball, can realize normal unlatching and reset good airproof performance.

The step of using the utility model to drag for sand is:

(1) be lowered in the process at pipe string, the broken sand of sand bucket front end pushes away the sand instrument and clears up remaining on the casing wall residual sand, and pushes it to and inhale the sand mouth, horizontal sand shovel contact sand face, and the weight of horizontal segment is supported by centralizer;

(2) when carrying power oil pipe on the tractor hoist, drive piston rod, soft piston and hard piston and rise, at this moment go up valve and close, bottom valve is opened, and carries sand and enter sand sediment pipe, and sand in the sand sediment pipe and well liquid are up because sand proportion is bigger, constantly sink, well liquid rises;

(3) with step (2) simultaneously, the well liquid that the sand block short circuit filter to rise makes sand can only be deposited in the sand sediment pipe;

(4) when tractor hoist is transferred power oil pipe, drive piston rod, soft piston and hard piston and descend, at this moment to go up valve and open, bottom valve cuts out, and sand can not be got back in the sleeve pipe, and the top well liquid that does not contain sand, valve and circulation port are got back to the oil jacket annular space again on the process;

(5) put operation through putting on repeatedly, can realize sand is dragged for into sand sediment pipe, take pit shaft out of by oil pipe.

Claims

1, a kind ofly be used for the system that the oil well level is dragged for sand, it is characterized in that: be provided with outage above the piston rod of the vertical section of sand bucket, piston rod is provided with valve; On the sand bucket horizontal segment, from the sand sediment pipe to the other end, be provided with piston cylinder successively, be provided with hard piston, soft piston, sand block short circuit, broken sand behind the piston cylinder and push away the sand instrument, on the horizontal segment pump housing, be provided with the instrument of setting upright, the other end that pushes away the sand instrument at broken sand is provided with bottom valve and sand shovel, and the horizontal sand that is combined into of bottom valve and sand shovel shovels.

2, a kind of system that the oil well level is dragged for sand that is used for according to claim 1 is characterized in that: described upward valve is common ball-and-seat, and bottom valve is the ball-and-seat that resets that leads, and described bottom valve valve interior wall upper edge valve body is axially arranged with three grooves.

3, a kind of system that the oil well level is dragged for sand that is used for according to claim 1 and 2 is characterized in that: the bead in the described bottom valve is the bakelite ball.

4, a kind of system that the oil well level is dragged for sand that is used for according to claim 1 is characterized in that: the described instrument of setting upright is rubber centralizer or rolling wheel centralizer.