CN2464932Y - Anchoring device for oil sucking pipe - Google Patents

Abstract

The utility model relates to an anchoring device for an oil sucking pipe column for the mechanical oil production of an oil field, which is composed of an upper joint, an inner sealing ring, an outer sealing ring, a piston, a sealing cylinder, an upper cone, a lock ring, screws, a key block, a slip, a lower cone, pins and an inner pipe. When the pressure in an oil pipe is raised, the upper cone is pushed to move downwards by the piston, the distance between the upper cone and the lower cone is shortened, and the slip is slipped on a casing pipe. The problem that the oil sucking pipe column extends and is shortened by that the upper and the lower strokes of the oil sucking pipe column are changed alternately is eliminated, an oil sucking pump has high pump efficiency, and other tools on the oil sucking pipe column can be ensured to work normally. When the pipe column is lifted, the pin on the anchoring device is cut down, and the slip is recovered by moving downwards the lower cone.

Description

The pumping pipe string anchoring device

The utility model belongs to the pumping pipe string anchoring device that oil field machinery oil is used.

Major part is the rod-type pumpingh well in the oil well, during the upstroke of the pumping pipe string of this producing well in oil pumping process, fluid column is loaded with by sucker rod and is born, fluid column is loaded with by pumping pipe string and is born during down stroke, and therefore, pumping pipe string will bear alternation and load with, under the alternating download negative interaction, pumping pipe string extends shortening along with the variation of up-down stroke, the pumping pipe string elongation is shortened on the one hand and reduced the oil well pump pump efficiency, can influence the functional reliability of other instrument on the pumping pipe string on the other hand.The way that solves pumping pipe string elongation shortening at present is to adopt anchoring device, and anchoring device is anchored on pumping pipe string on the sleeve pipe, makes pumping pipe string not extend shortening with the variation of up-down stroke.Existing anchoring device has two types, and one type is that such anchoring device causes the bending of pumping pipe string easily, influences the operate as normal of pumping pipe string by the fixing oil pipe of the oil pipe weight on anchoring device top.Another kind of anchoring device is to rely on fixedly oil pipe of the inside and outside pressure official post anchoring device action of tubing and casing, as the patent No.: 93240417.0 multifunction hydraulic tubing anchors, the alternation that bears on the pumping pipe string is loaded with by shear pin and is born, the reliability of shear pin does not all reach 100% at present, after shear pin lost efficacy, the draining hole on the tubing anchor will UNICOM, and the oil of extraction is spilt from the draining hole, therefore, the shear pin of this tubing anchor is in case inefficacy must workover treatment.

The purpose of this utility model provides a kind of pumping pipe string anchoring device, make it have higher reliability, all do not reach in the pin reliability under 100% the situation, after pin lost efficacy, still can guarantee the normal oil pumping of pumping pipe string, avoid oil well because of the pin operation of losing efficacy.

The purpose of this utility model is achieved in that it is made up of top connection, inner seal ring, exterior seal ring, piston, sealing drum, upper cone, lock ring, screw, key piece, slips, lower cone, pin, interior pipe.Top connection lower end minor thread connects with interior pipe upper end, top connection lower end major thread and sealing drum upper end thread connection, between the outside piston is being arranged on sealing drum inside and the interior pipe, inner seal ring is arranged on the piston, exterior seal ring, internal piston has a shoulder, the piston bottom connects upper cone, upper cone is in outside the interior pipe, under the sealing drum, in upper cone inside, lock ring is arranged under the piston, button screws mutually with the outer button in interior pipe middle part in the lock ring, on the outer button in interior pipe middle part a shoulder is arranged, this shoulder and internal piston shoulder match and close the effect that limits the upper cone displacement, and there is lower cone the outside under the interior pipe, and lower cone by dowel fixes on inner pipe, upper cone, slips is arranged between the lower cone, on the slips external surface, the opposite teeth of teeth directional are arranged, upper cone down, the key piece is arranged on the lower cone, the key piece by screw fixings at upper cone, on the lower cone, slips is fixed on upper cone, on the key piece of lower cone, make the slips can only be with upper cone, the change of distance between the lower cone and inwardly or outwards motion.When this pumping pipe string anchoring device is connected on the oil well pump, in oil pipe, boost, make the inside and outside pressure reduction that produces of pumping pipe string anchoring device, it is descending to promote piston, upper cone, lock ring under differential pressure action, shortened the distance between upper cone, the lower cone, slips is outwards motion thereupon, and card is firm on sleeve pipe, thereby pumping pipe string is fixed on the sleeve pipe.After pressure disappeared, under the lock ring effect, distance remained unchanged between upper cone, the lower cone, and therefore, pumping pipe string is fixed on the sleeve pipe, can not lose fixing automatically.When well workover need propose pumping pipe string, carry pumping pipe string on the ground, when upper lifting force reached certain value, the pin on the pumping pipe string anchoring device was cut off, and lower cone is descending, under the shoulder and the effect of matching of internal piston shoulder outside interior pipe middle part on the button, upper cone can not move down, so the distance between upper cone and the lower cone increases, slips is regained, finished the release of pumping pipe string anchoring device, pumping pipe string is proposed smoothly.

Pumping pipe string anchoring device of the present utility model can reach its intended purposes, eliminated the pumping pipe string elongation shortening that pumping pipe string causes because of up-down stroke alternately changes, avoided shortening the loss of plunger stroke that causes because of the pumping pipe string elongation, make oil well pump that higher pump efficiency be arranged, guarantee other instrument energy operate as normal on the pumping pipe string, both made when can not 100% reliably losing efficacy because of pin, the oil that can occur extracting out does not drain back to the problem of oil well again, and oil well is ordinary production within a certain period of time still.

Accompanying drawing is the structure half sectional view of the utility model embodiment.

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

In the accompanying drawings: the 1st, top connection, the 2nd, inner seal ring, the 3rd, exterior seal ring, the 4th, piston, the 5th, sealing drum, the 6th, upper cone, the 7th, lock ring, the 8th, screw, the 9th, key piece, the 10th, slips, the 11st, lower cone, the 12nd, pin, the 13rd, interior pipe, promptly the utility model is made up of top connection 1, inner seal ring 2, exterior seal ring 3, piston 4, sealing drum 5, upper cone 6, lock ring 7, screw 8, key piece 9, slips 10, lower cone 11, pin 12, interior pipe 13.Top connection 1 lower end minor thread connects with interior pipe 13 upper ends, top connection 1 lower end major thread and sealing drum 5 upper end thread connection, between the outside piston 4 is being arranged on sealing drum 5 inside and the interior pipe 13, inner seal ring 2 is arranged on the piston 4, exterior seal ring 3, there is a shoulder piston 4 inside, piston 4 bottoms connect upper cone, manage outside 13 in upper cone 6 is in, under the sealing drum 5, in upper cone 6 inside, lock ring 7 is arranged under the piston 4, in the lock ring 7 outside button and interior pipe 13 middle parts button screw mutually, on the button shoulder is arranged outside interior pipe 13 middle parts, this shoulder and piston 4 inner circular bead match and close the effect that limits upper cone 6 displacements, there is lower cone 11 13 times outsides of interior pipe, in being fixed on by pin 12, lower cone 11 manages on 13, upper cone 6, slips 10 is arranged between the lower cone 11, on slips 10 external surfaces, the opposite teeth of teeth directional are arranged down, upper cone 6, key piece 9 is arranged on the lower cone 11, key piece 9 is fixed on upper cone 6 by screw 8, on the lower cone 11, slips 10 is fixed on upper cone 6, on the key piece 9 of lower cone 11, make the slips 10 can only be with upper cone 6, the change of distance between the lower cone 11 and inwardly or outwards motion.When this pumping pipe string anchoring device is connected on the oil well pump, in oil pipe, boost, make the inside and outside pressure reduction that produces of pumping pipe string anchoring device, it is descending to promote piston 4, upper cone 6, lock ring 7 under differential pressure action, shortened the distance between upper cone 6, the lower cone 11, slips 10 is outwards motion thereupon, and card is firm on sleeve pipe, thereby pumping pipe string is fixed on the sleeve pipe.After pressure disappeared, under lock ring 7 effects, distance remained unchanged between upper cone 6, the lower cone 11, and therefore, pumping pipe string is fixed on the sleeve pipe, can not lose fixing automatically.When well workover need propose pumping pipe string, carry pumping pipe string on the ground, when upper lifting force reached certain value, the pin 12 on the pumping pipe string anchoring device was cut off, and lower cone 11 is descending, under the effect of matching of shoulder outside interior pipe 13 middle parts on the button and piston 4 inner circular bead, upper cone 6 can not move down, so the distance between upper cone 6 and the lower cone 11 increases, slips 10 is regained, finished the release of pumping pipe string anchoring device, pumping pipe string is proposed smoothly.

Claims (3)

1, the pumping pipe string anchoring device that a kind of oil field machinery oil is used, by top connection (1), inner seal ring (2), exterior seal ring (3), piston (4), sealing drum (5), upper cone (6), lock ring (7), screw (8), key piece (9), slips (10), lower cone (11), pin (12), interior pipe (13) is formed, it is characterized in that top connection (1) lower end minor thread connects with interior pipe (13) upper end, top connection (1) lower end major thread and sealing drum (5) upper end thread connection, upward between the outside piston (4) is arranged in sealing drum (5) inside and interior pipe (13), piston (4) bottom connects upper cone (6), upper cone (6) is in outside the interior pipe (13), under the sealing drum (5), in upper cone (6) inside, lock ring (7) is arranged under the piston (4), interior pipe (13) has lower cone (11) in the outside down, lower cone (11) is fixed on the interior pipe (13) by pin (12), upper cone (6), slips (10) is arranged between the lower cone (11), upper cone (6), key piece (9) is arranged on the lower cone (11), and key piece (9) is fixed on upper cone (6) by screw (8), on the lower cone (11).

2, pumping pipe string anchoring device according to claim 1 is characterized in that inner seal ring (2), exterior seal ring (3) are arranged on the piston (4), and internal piston has a shoulder.

3, pumping pipe string anchoring device according to claim 1, it is characterized in that slips (10) external surface is upper and lower has opposite teeth of teeth directional.

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