CN2353932Y

CN2353932Y - Load reducer for oil-pumping machine

Info

Publication number: CN2353932Y
Application number: CN 98208597
Authority: CN
Inventors: 侯宗; 欧连贵; 欧海光
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-03-27
Filing date: 1998-03-27
Publication date: 1999-12-15
Anticipated expiration: 2008-03-27

Abstract

The utility model discloses a load reducer for oil-pumping machines for oil well pumps to carry out oil exploitation. The utility model is mainly composed of a plunger piston tube 2, an upper sealed tube 4, a lower sealed tube 5, a load reduction piston 7, etc. The load reduction piston 7 is sheathed in a lower sealed tube 5. The upper sealed tube 4, a lower sealed tube 5 and a lower joint 14 are successively connected through screw threads. The plunger piston tube 2 is sheathed in the sealed tube 4 and an inner hole of the load reduction piston 7, and a step 6 of the plunger piston tube is arranged on the load reduction piston 7. With the utilization of a breathing hole 9, the upper end face and the lower end face of the load reduction piston 7 are respectively arranged in different pressure systems of a jacket tube and an oil tube. With an upward lifting power generated by that the liquid column height in the oil tube is higher than the dynamic liquid level height in the jack tube, the purpose of reducing the horsehead polished rod load of oil-pumping machines is achieved.

Description

The pumping unit load reducer

The utility model relates to and alleviates the pumping unit horsehead polished rod load in a kind of petroleum production, cuts down the consumption of energy, and uses common D level steel sucker rod just can realize the pumping unit load-shedding equipment that pumping unit is taken out deeply.

Along with the prolongation of petroleum production time and the increase of recovery percent of reserves, petroleum resources are day by day exhausted, and the exploitation direction shifts to deeply buried reservoir, energy oil reservoir low, poor permeability gradually.For this class reservoir development, the main at present mining type that adopts is to use the little pump of rod pump to take out deeply.In order to satisfy the needs of taking out deeply, vast petroleum science and technology personnel have developed the minor diameter series oil well pump of different size and purposes successively; Has H bar than high-tensile; Has little, the lightweight glass fiber reinforced plastic oil pumping rod of density; And the large-scale pumping unit that bearing load is big, stroke is long.These though created certain technical specifications and means for taking out exploitation deeply, have played certain effect of taking out deeply.But still there are following three big major defects in existing taking out deeply in the technological means:

One, be subjected to the outstanding neck of pumping unit horsehead to decide the restriction of load, the following pump degree of depth is subjected to certain restriction.Though H bar and other have the more sucker rod of high-tensile model, have the big advantage of tensile strength, because of its material is a steel, density is big, and roofbolt weight is big.Therefore, take out deeply in the well its down pump degree of depth be subjected to the restriction of pumping unit horsehead suspension point load rating, can not give full play to the big advantage of its tensile strength.Change the pumping unit of bigger model, too high because of investing again, promoted extension is limited.

Two, be subjected to the restriction of material of sucker rod performance, promoted extension is restricted.Though it is little that glass fiber reinforced plastic oil pumping rod has density, can deepen pump because of alleviating of roofbolt weight and hang, realize the advantage of taking out deeply, because of its material property at aspects such as resistance to compression, antitorque, bending resistances, can not show a candle to the steel sucker rod.Therefore, in case the oil well pump card takes place, fault such as bump, glass fiber reinforced plastic oil pumping rod is very easily destroyed, does not have the carrying out flaw detection equipment of glass fiber reinforced plastic oil pumping rod at present again in addition in the production.Obvious expensive glass fiber reinforced plastic oil pumping rod is difficult to satisfy the needs that the oil play large size is promoted.

Three, be subjected to the restriction of prior art means, the oil field development benefit is restricted.Under present technical specifications, when adopting pumping unit to drive reciprocating productions of oil well pump, the fluid column weight more than roofbolt weight in the pumping well and the oil well pump net sectional area all will be carried by the horse head suspension point.And the motion of pumping unit drives by motor or other power equipment again, and therefore, the pumping unit energy consumption is very big, so that causes cost of crude oil production height, oilfield economic benefit low.

The purpose of this utility model is at three above-mentioned big major defects, a kind of rational in infrastructure, reliable operation, widely applicable, easy to operate is provided, can alleviate the pumping unit horsehead polished rod load significantly, just can deepen the pumping unit load reducer that pump is hung, improved the pumping well system effectiveness significantly with common D level steel sucker rod.

Figure one is the utility model structural representation:

Load reducer for oil-pumping machine is by rod connector 1, plunger tube 2, upper outage 3, upper sealed tube 4, lower close Tube sealing 5, plunger tube step 6, lightening piston 7, jump-ring slot 8, spiracle 9, seal groove 10, on-off connector Discharge the compositions such as chamber 11, lower outage 12, sucker rod on-off connector joint 13, lower contact 14. Wherein main Formed by four big parts such as plunger tube 2, upper sealed tube 4, lower seal pipe 5, lightening pistons 7.

Plunger tube 2 is one, and upper diameter is big, lower diameter is little, and the size diameter junction is a step 6, and car has screw thread in the pipe of two ends, has the pipe shape overall structure of outage 3, following outage 12 near screw thread place, two ends.

Last sealed pipe 4 is that a upper end is a box, and the lower end is the pipe shape overall structure of pin thread.

Lower seal pipe 5 is that two ends are box, has the pipe shape overall structure of jump ring groove 8, spiracle 9, seal groove 10 in upper inside wall.

Lightening piston 7 be one cylindrical near the upper end have jump ring groove 8, internal diameter is up-small and down-big, big or small internal diameter junction is a step, has the tubulose overall structure of seal groove 10 on little internal diameter top.

Advantage of the present utility model is: by the appropriate design and the textural association of four big parts such as plunger tube 2, last sealed pipe 4, lower seal pipe 5, lightening piston 7, made full use of and taken out deeply in the well that fluid column is much higher than dynamic liquid level height in the sleeve pipe in the oil pipe, and, just can alleviate the pumping unit horsehead polished rod load significantly by the lifting force that this liquid-column height difference is produced.Meanwhile, owing to the effect of this lifting force, make stressed the reducing of sucker rod on its top.Therefore, in the rod string combination at an upper portion thereof, the ratio of major diameter bar can greatly reduce.Obviously, this will further alleviate the pumping unit horsehead polished rod load.Therefore, the utility model has not only solved a difficult problem of utilizing prior art equipment to take out deeply, and is applied in the lower general pumping well of other producing fluid level, can obtain equally off-load, energy-conservation, the consumption reduction effect.Therefore, it have be skillfully constructed, design uniqueness, simple in structure, reliable operation, off-load significantly, be convenient to characteristics such as construction and assembling maintenance.

The utility model will be further described below in conjunction with accompanying drawing:

The utility model by rod connector 1, plunger tube 2, go up outage 3, go up sealed pipe 4, lower seal pipe 5, plunger tube step 6, lightening piston 7, jump ring groove 8, spiracle 9, seal groove 10, connecting-and-unconnecting device discharge chamber 11, outage 12, sucker rod connecting-and-unconnecting device joint 13, lower contact 14 etc. are formed down.Jump ring embeds in the jump ring groove 8." O " RunddichtringO embeds in the seal groove 10.Lightening piston 7 is inserted in lower seal pipe 5, and contacts with its inner wall sealing.Last sealed pipe 4, lower seal pipe 5, lower contact 14 are successively by scyewed joint.Plunger tube 2 is inserted in the endoporus of sealed pipe 4 and lightening piston 7, contacts with their inwall difference sealing, and its step 6 is seated on the lightening piston 7.Utilize the respiration of spiracle 9, make the upper and lower end face of lightening piston 7, be in respectively in the different pressures system of sleeve pipe and oil pipe, utilize the interior liquid-column height of oil pipe to be higher than dynamic liquid level height in the sleeve pipe, and, reach the purpose that alleviates the pumping unit horsehead polished rod load by the upwards lifting force that this height difference produced.

Working principle of the present utility model is: when pumping unit horsehead was descending, lightening piston 7 was driven by the rod string weight below it and moves downward; When pumping unit horsehead is up, because liquid-column height is much higher than the height of producing fluid level in the sleeve pipe in the oil pipe, the active force that is produced by oil, this liquid-column height difference between sleeve pipe, act on the lower end surface of lightening piston 7, make it produce a lifting force that makes progress, this makes every effort to overcome the part weight of fluid column in its lower sucker rod post of clothes and the oil pipe, the rod string that lightening piston 7 drives below it moves upward together, thereby greatly alleviated the pumping unit horsehead polished rod load, realized the purpose of pumping unit off-load.Extract is discharged in this oil pipe above load reducer by following outage 12, plunger tube 2 internal channels, last outage 3 and returns out ground, so just finishes an aspiration procedure.And the like, reciprocation cycle.Spiracle 9 is respiration channels that lightening piston 7 moves up and down, to ensure the proper functioning of this piston.

When the oil wells in field job execution, the utility model is serially connected with oil pumping pump line, roofbolt middle part.Earlier with in the oil well pump pump barrel below the utility model, oil pipe, oil well pump piston and the sucker rod lower going-into-well successively, after adjusting sucker rod and over-stroke, on oil pipe, connect lower contact 14 of the present utility model, on sucker rod, connect connecting-and-unconnecting device main body commonly used, and allow the disjointed device main body be seated in the lower contact 14.Be lowered to lower seal pipe 5, lightening piston 7 that the utility model assembled subsequently, (this moment, lightening piston 7 was in the top of lower seal pipe 5 to go up sealed pipe 4, and pinned by jump ring 8, spiracle 9 is sealed by lightening piston 7 and seal ring 10) then, connect oil pipe and go into well, up to oil well pump is arrived designed depth down, seated boll-weevil hanger can carry out pressure test and leakage test to tubing string according to a conventional method.After pressure testing is qualified, be lowered to the plunger tube 2 that has connected sucker rod connecting-and-unconnecting device uncoupling head again, rod connector 1 and sucker rod.When sucker rod arrives the utility model position down, under the rod string action of gravity, plunger tube 2 inserts to be gone up in the sealed pipe 4, its reduced diameter section inserts the endoporus of lightening piston 7, plunger tube step 6 is seated at the upper-end surface of lightening piston 7, and promote lightening piston 7 and move down, the uncoupling head of sucker rod connecting-and-unconnecting device just inserts the connecting-and-unconnecting device main body, realizes that full well roofbolt connects.At this moment, spiracle 9 is opened, and is set up by the lifting force that the liquid-column height difference between oil pipe and sleeve pipe is produced.So far, adjust roofbolt again, connected polished rod, carried the roofbolt section over-stroke on the utility model top, can completion production.Next time is during pump detection and workover, goes into the well reversed in order with above-mentioned, can examine the pump construction smoothly.

Claims

1, a kind ofly is used for the pumping unit load reducer that petroleum production alleviates the pumping unit horsehead polished rod load; By rod connector (1), plunger tube (2), go up outage (3), go up sealed pipe (4), lower seal pipe (5), plunger tube step (6), lightening piston (7), jump ring groove (8), spiracle (9), seal groove (10), connecting-and-unconnecting device discharge chamber (11), outage (12), sucker rod connecting-and-unconnecting device joint (13), lower contact (14) etc. are formed down; It is characterized in that: lightening piston (7) is inserted in lower seal pipe (5) and contacts with its inner wall sealing; Last sealed pipe (4), lower seal pipe (5), lower contact (14) are successively by scyewed joint; Plunger tube (2) is inserted in the endoporus of lower seal pipe (4) and lightening piston (7), contacts with their inner wall sealing, and its step (6) is sitting on the lightening piston (7); And utilize the respiration of spiracle (9), the upper and lower end face of lightening piston (7) is in respectively in the different pressures system of sleeve pipe and oil pipe; Plunger tube (2) is one, and upper diameter is big, lower diameter is little, the size diameter junction is a step (6), the two ends car has screw thread, have outage (3), the following tubulose overall structure of outage (12); Last sealed pipe (4) is a threaded tubulose overall structure of two ends car; Lower seal pipe (5) is that a two ends car has screw thread, upper inside wall to have the tubulose overall structure of jump ring groove (8), spiracle (9), seal groove (10), and jump ring and " O " type black box are housed respectively in jump ring groove (8) and seal groove (10); Lightening piston (7) is one, and have jump ring groove (8), up-small and down-big, the big or small internal diameter of internal diameter junction on cylindrical top be a step, have seal groove (10) on minor diameter top, the tubulose overall structure of " O " type black box is housed in seal groove (10).

2, pumping unit load reducer according to claim 1 is characterized in that: this pumping unit load reducer mainly is made up of plunger tube (2), last sealed pipe (4), lower seal pipe (5), lightening piston four big parts such as (7); When in pumping well, using, utilize the respiration of spiracle (9), the upper and lower end face of lightening piston (7) is in respectively in the different pressures system of sleeve pipe and oil pipe, and the liquid-column height in the oil pipe is much higher than the dynamic liquid level height in the sleeve pipe, the upwards lifting force that utilizes this height difference to produce reaches the purpose that alleviates the pumping unit horsehead polished rod load significantly.