CN2851643Y

CN2851643Y - Sand-settling disposable plunger pump

Info

Publication number: CN2851643Y
Application number: CN 200520132536
Authority: CN
Inventors: 邓斌; 徐遵义; 于国文; 李景波; 刘继海; 刘秀兰; 彭松良
Original assignee: China Petroleum and Natural Gas Co Ltd
Current assignee: China Petroleum and Natural Gas Co Ltd
Priority date: 2005-11-11
Filing date: 2005-11-11
Publication date: 2006-12-27
Anticipated expiration: 2015-11-11

Abstract

The utility model relates to a sand-settling disposable pipe column pump which is composed of double short pump barrels 1, long plungers 2, steam injecting holes 3, a lower working cavity 4 and group valves 5. Due to the adoption of the structure that the double short pump barrels are connected with the lower working cavity, the long plungers are lined in the double short pump barrels; the upper parts and the lower parts of the long plungers are respectively connected with the group valves; the steam injecting holes are arranged on the double short pump barrels; the lower working cavity is provided with the group valves, so that after used for steam soak of thick oil wells, the utility model directly pumps well liquid from the oil wells. As a result, the quantity of work is reduced, favorable oil production periods are fully utilized, the pollution of oil layers is prevented and the purposes of production increase and energy saving are achieved. With the up and down movement of the plungers, scale formed on the surfaces of the plungers is removed, the scale accumulation is avoided and the steam injection sealing is guaranteed not to fail. When oil is pumped, a steam injecting channel becomes a sand discharging channel through which dirt, such as sand, etc. in gaps between the pump and the plungers is discharged out of the pump. With the structure of double short pump barrels and the long plungers, sand seizure and sand burying are prevented and the service life of the disposable pipe column pump is extended.

Description

Tubing string pump of sand setting

Technical field:

The utility model relates to the downhole tool on a kind of oilfield pumping well, particularly tubing string pump of sand setting.

Background technique:

Along with the continuous growth of thick oil well production time, annotating the vapour cycle constantly shortens, and some heavy oil block sand production phenomenons are also serious day by day, has caused to annotate and has adopted and the continuing to increase of sand card pump detection and workover amount, and has not only increased the viscous crude cost of production, but also has influenced oil well output.

Technological scheme

The utility model purpose is to provide sand setting a tubing string pump, can realize notes vapour one oil pumping process of many rounds and motionless steam injection string and have the oil production technology technology of anti-, row, sand setting function, with the contradiction of alleviating viscous crude operation anxiety, the purpose that reaches Increasing Production and Energy Saving, reduce production costs.

The utility model purpose is to realize like this, it is made up of two short pump barrels (1), long-plunger (2), notes steam vent (3), following active chamber (4), valve group (5), two short pump barrels (1) are connected with following active chamber (4), be lined with long-plunger (2) in it, long-plunger (2) is connected to valve group (5) up and down respectively, notes steam vent (3) is arranged on two short pump barrels (1), and following active chamber (4) is valve group (5).

This pump is when work, plunger can obtain cleaning in the oil pipe on pump barrel top and following active chamber, the booty and the sand that scrape are leaked in the oil, keep the cleaning between operative minor, reach the purpose that prevents the sand card, simultaneously, the booties such as sand that enter in plunger and the pump barrel gap can be by annotating outside steam vent (clearance hole) excavationg pump by plunger upward and downward, sink to the shaft bottom, reach the purpose that sediment outflow increases the service life.

When annotating vapour, this pump and rod string are gone into the well simultaneously with steam injection string, on earth after, on carry a sucker rod, plunger is proposed pump barrel, hang on the pump in the oil pipe, will annotate steam vent and open, can annotate vapour, having annotated vapour changes when taking out, and transfers rod string more on earth, and plunger will be annotated the steam vent sealing, can change and take out production.

The utility model is owing to adopted two short pump barrels to be connected with following active chamber, be lined with long-plunger in it, long-plunger is connected to the valve group up and down respectively, and the notes steam vent is arranged on two short pump barrels, following active chamber is the valve group, be used for behind the thick oil well steam soak directly from oil well swabbing well liquid, after having changed conventional thermal recovery and will waiting oil well to annotate the vapour stop-spraying, trip out the situation that could descend the pump commentaries on classics to take out behind the steam injection string, reduced workload, make full use of the favourable oil recovery phase, prevented oil layer pollution, reached the purpose of Increasing Production and Energy Saving., in new pump type, changing static seal into motive sealing, the first run along with moving up and down of plunger can be removed its surperficial institute scaling, has been avoided the fouling accumulation after annotating vapour production, and making and annotating steam packing is no longer to lose efficacy.The simple function of annotating the vapour passage is expanded to dual functions, and promptly annotating the vapour passage when oil pumping becomes the sediment outflow passage, can with pump with the plunger gap in booty excavationg pumps such as sand outside; Whole pump design changes long pump barrel short column plug into two short pump barrel long-plunger structures, prevents that sand card, sand from burying, and prolongs the working life of a tubing string pump.

Description of drawings

Accompanying drawing is a structural representation of the present utility model.

The utility model is described in further detail below in conjunction with accompanying drawing.

Embodiment

As shown in the figure, the utility model is made up of two short pump barrels 1, long-plunger 2, notes steam vent 3, following active chamber 4, valve group 5, and two short pump barrels 1 are connected with following active chamber 4, be lined with long-plunger 2 in it, long-plunger 2 is connected to valve group 5 up and down respectively, and the steam vent 3 of notes is arranged on two short pump barrels 1, and following active chamber 4 is valve groups 5.Can realize notes vapour one oil pumping process of many rounds and motionless steam injection string and a novel tubing string pump, to adapt to the demand of short sanding heavy crude oil well of steam incoming and outcoming cycle with anti-, row, sand setting function.

The existing pump type be sealed into static seal, sealed plunger surface easy scaling in steam injection process is annotated the above fouling of vapour two-wheeled and is piled up, and makes sealed plunger enter the sealing pump barrel difficulty that becomes, and causes seal failure.At the problems referred to above, in new pump type, change static seal into motive sealing, the first run along with moving up and down of plunger can be removed its surperficial institute scaling, has been avoided the fouling accumulation after annotating the production of vapour first run notes vapour, and notes steam packing system was no longer lost efficacy.

By annotating the transformation of steam packing system, the simple function of annotating the vapour passage is expanded to dual functions, promptly when oil pumping, annotate the vapour passage and become the sediment outflow passage, whole pump design changes long pump barrel short column plug into two short pump barrel long-plunger structures, make this pump have the function that prevents that sand card, sand from burying, prolong the working life of a tubing string pump.

During proper functioning, along with the up-down stroke motion, long-plunger can obtain to clean in the oil stream of the oil pipe on pump barrel top and bottom active chamber, the pump barrel that scrapes is leaked in the oil cleaning of maintenance plunger surface with the booties such as sand in the plunger gap, simultaneously, long-plunger forms one and is equivalent to 3 (or 5) rice stirrer long, that move up and down in moving up and down on pump, make the sand of pump in oiling be difficult for depositing at the pumping hole place, most parts of sand will be taken away the discharge well head with oily stream, prevent that sand buries on the pump.

Pump barrel in the middle of two short pump barrels connects on the box cupling and has the notes steam vent, makes in the pump logically with pump outer shroud Kongxiang, when the pump ordinary production, a small amount of oil stream will be arranged because plunger oozes out pump barrel inflow annular space with the gap leaking loss of pump barrel by clearance hole on the pump.And enter booties such as sand in plunger and the pump barrel gap, when arriving clearance hole by plunger upward and downward, will be with lost fluid together by outside the clearance hole excavationg pump, sink to the shaft bottom, outside the continuous excavationg pump along with booties such as sands, this has just ensured the alluvial that does not have booties such as sand in plunger and the pump barrel gap, has prevented the generation that sand card, sand bury.

In addition, owing to used long-plunger, short pump barrel structure, this pump is compared with conventional pump, and the plunger wear degree reduces greatly, can increase the service life 2～3 times.

Claims

1, tubing string pump of sand setting, it is made up of two short pump barrels (1), long-plunger (2), notes steam vent (3), following active chamber (4), valve group (5), it is characterized in that: two short pump barrels (1) are connected with following active chamber (4), be lined with long-plunger (2) in it, long-plunger (2) is connected to valve group (5) up and down respectively, notes steam vent (3) is arranged on two short pump barrels (1), and following active chamber (4) is valve group (5).