CN200952370Y

CN200952370Y - Large path sandproof hanger

Info

Publication number: CN200952370Y
Application number: CN 200620149831
Authority: CN
Inventors: 徐旭
Original assignee: XINJIANG LANHAI PETROLEUM ENGINEERING TECHNOLOGY Co Ltd
Current assignee: XINJIANG LANHAI PETROLEUM ENGINEERING TECHNOLOGY Co Ltd
Priority date: 2006-09-22
Filing date: 2006-09-22
Publication date: 2007-09-26
Anticipated expiration: 2016-09-22

Abstract

The utility model relates to a large-diameter sand prevention hanger. An upper socket pipe and the lower part of the peripheral wall are arranged with a central tube and a cylinder sleeve respectively, which are arranged with an upper piston ring therebetween. A ring-shaped flange sheathed inside a piston cylinder is arranged on the peripheral wall on the middle part of the central tube. The piston tube is provided with a lower piston ring on the bottom and coordinates with the inner wall of the cylinder sleeve. The upper and lower piston rings are provided with hydraulic cavities respectively. The central tube is provided with liquid inlet holes communicated with the hydraulic cavities. The lower end of the central tube is connected with a left-hand back-off with a petaloid lower end and the upper end is connected with a ball seat tube by a 2nd level shear pin. The left-hand back-off is provided with the inner flange inside and the lower part of the left-hand back-off is connected with the upper part of the hanger cone. The lower part of the ball seat tube is connected with a lock ring contacting with the inner wall on the lower part of the left-hand back-off. The lower piston ring is sheathed inside an outside sleeve and the lower part is connected with the lower part of the hanger cone by 1st shear pin. A cushion rubber is sheathed inside the outer wall of the cone on the lower part of the outside sleeve. The utility model has the advantages of easy setting and unsetting, reliable back-off structure and great accident frequency reduction.

Description

Big latus rectum sand control hanger

Technical field

The utility model relates to a kind of improvement of oil field sand prevention hanger structure, particularly big latus rectum sand control hanger.

Background technology

At present, the used sleeve pipe sand control hanger in oil field is to hang 5 cun sleeve pipes in 7 cun sleeve pipes, adopts all-hydraulic setting, though set easily, the deblocking difficulty, and because the structural reliability of giving up of installing in the sleeve pipe is relatively poor, giving up is easy to lose efficacy, and will cause the set of tools can't trip out pit shaft.Often cause comparatively serious production accident, cause serious economy loss for Petroleum Production enterprise.

The utility model content

The purpose of this utility model is to provide a kind of big latus rectum sand control hanger, and it is simple in structure, is easy to set, deblocking, and the structural reliability of giving up height can reduce accident rate greatly, helps reducing the oilfield economic loss.

The purpose of this utility model is achieved in that a kind of big latus rectum sand control hanger, comprise hanger cone and top connection pipe, in the top connection pipe, the bottom of periphery wall is set with affixed central tube and cylinder sleeve, cooperate suit upper piston ring in the annular fluid cylinder that constitutes between central tube and the cylinder sleeve, being provided with one on the central tube middle part periphery wall of upper piston ring below is the liquid sealing engage sleeves and is contained in annular lip in the piston cylinder, the lower piston ring that matches for the central tube periphery wall with the annular lip below in the piston cylinder bottom, the periphery wall of piston cylinder matches with inboard wall of cylinder liner; In upper and lower piston ring internal perisporium and end face intersection annular hydraulic cavities that indent is being set respectively separately, the inlet opening that is connected with said hydraulic cavities is being set respectively on the tube wall of central tube; Connecting column casing shape left-hand thread by the change clasp on the central tube peripheral edge of bottom gives up, left-hand thread is given up and is liquid sealing in the top and cooperates suit the ball seat pipe that is linked together by the secondary shear pin, ball seat pipe top has outward flange, left-hand thread is given up be provided with on the internal perisporium of bottom ball seat pipe outward flange is carried out spacing inward flange, the bottom that left-hand thread is given up is vertical uniform setting and extends to the give up saturating groove of bottom of left-hand thread, make the left-hand thread bottom of giving up be flap, on ball seat pipe lower, outer perimeter wall by the lock ring that is being threaded, lock ring periphery wall and the left-hand thread that the is flap bottom internal perisporium of giving up contacts, and the left-hand thread lower, outer perimeter wall of giving up links to each other by screw thread with hanger cone top internal perisporium; On the lower piston ring periphery wall suit affixed outer sleeve, the outer sleeve bottom links to each other with the hanger cone top with outward flange by the one-level shear pin, suit cushion rubber on the cone periphery wall between hanger cone outward flange and the outer sleeve bottom surface.

When the utility model uses, upwards put into a steel ball in the junction block, make its top of falling the ball seat pipe, seal the mouth of pipe of ball seat pipe, in central tube, inject highly pressurised liquid, highly pressurised liquid enters in the hydraulic cavities that is provided with on the upper and lower piston ring internal perisporium respectively by the inlet opening that is provided with on the center tube wall, promote upper and lower piston ring and move downward, outer sleeve is moved down cut off the one-level shear pin, then to the lower compression cushion rubber, the radially complete distending of cushion rubber is set on internal surface of sleeve pipe, set easily.Remove highly pressurised liquid, then cushion rubber shrinks and is easy to deblocking.When s continued to increase, the secondary shear pin was cut off, and the descending pressure release of ball seat pipe is till the inward flange that is provided with on ball seat pipe top outward flange and left-hand thread are given up the bottom internal perisporium contacts.Because the uniform groove thoroughly that is being provided with in the bottom that left-hand thread is given up, the bottom that left-hand thread is given up is flap, when the ball seat pipe is descending, be installed in that lock ring on the ball seat pipe lower, outer perimeter wall is descending thereupon no longer to contact with the left-hand thread bottom internal perisporium of giving up, then contract in the flap lower rim meeting that left-hand thread is given up and no longer with between the cone closely be connected, this moment, the upper lifting pipe post can trip out pit shaft with hanger hydraulic part, the part of giving up.Fail to slip out of the hand if give up, also can just change drilling tool, the hydraulic pressure and the part of giving up are tripped out pit shaft, the structural reliability of giving up height.The utility model is simple in structure, is easy to set, deblocking, can reduce accident rate greatly, helps reducing the oilfield economic loss.Use the utility model can hang 5.5 cun sleeve pipes in 7 cun sleeve pipes, latus rectum is compared with conventional hanger to some extent in it increases, and the increase of interior latus rectum all has positive effect for improving oil well output and the well workover salvaging of oil well later stage etc.

Description of drawings

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

Fig. 1 looks the semi-section structural representation for master of the present utility model;

Fig. 2 is the A-A cross-sectional view among Fig. 1.

The specific embodiment

A kind of big latus rectum sand control hanger as shown in Figure 1, comprises hanger cone 2 and top connection pipe 17, has connecting thread in the top of top connection pipe 17.The bottom of top connection pipe 17 inside and outside perisporiums is set with affixed central tube 11 and cylinder sleeve 15, cooperate suit upper piston ring 16 in the annular fluid cylinder that constitutes between central tube 11 and the cylinder sleeve 15, being provided with one on the central tube 11 middle part periphery walls of upper piston ring 16 belows is the liquid sealing engage sleeves and is contained in annular lip in the piston cylinder 14, the lower piston ring that matches for central tube 11 periphery walls with the annular lip below in piston cylinder 14 bottoms, the periphery wall of piston cylinder 14 matches with cylinder sleeve 15 inwalls.When upper piston ring 16 operation downwards, will promote the motion down of lower piston hoop by the periphery wall of piston cylinder 14.

As shown in Figure 1, in upper and lower piston ring internal perisporium and end face intersection annular hydraulic cavities that indent is being set respectively separately, the inlet opening 13 that is connected with said upper and lower hydraulic cavities is being set respectively on the tube wall of the upper and lower part of central tube 11, the highly pressurised liquid that enters in the central tube 11 from top connection pipe 17 enters respectively in the said hydraulic cavities by inlet opening 13, promotes upper and lower piston ring then and moves downward.

As shown in Figure 1, connect column casing shape left-hand thread by change clasp 10 on central tube 11 peripheral edge of bottom and giving up 6, left-hand thread is given up and is liquid sealing in 6 tops and cooperates suit the ball seat pipe 7 that is linked together by secondary shear pin 8, ball seat pipe 7 tops have outward flange, and left-hand thread is given up be provided with on the 6 bottom internal perisporiums ball seat pipe 7 outward flanges are carried out spacing inward flange.During use, drop into a steel ball 9 in central tube 11, make the import of steel ball 9 sealing ball seat pipes 7, injection highly pressurised liquid to central tube 11 in again when the pressure of highly pressurised liquid increases to certain value, will promote ball seat pipe 7 and move downward and cut off secondary shear pin 8 then.Ball seat pipe 7 goes downwards to its top outward flange and left-hand thread and gives up and promptly stop after the inward flange that being provided with on the 6 bottom internal perisporiums contacts.As shown in Figure 1 and Figure 2, give up 6 bottom of left-hand thread is vertical uniform setting and extends to the give up saturating groove of 6 bottoms of left-hand thread, make left-hand thread 6 bottoms of giving up be flap, on ball seat pipe 7 lower, outer perimeter walls by the lock ring 4 that is being threaded, lock ring 4 periphery walls and the left-hand thread that the is flap 6 bottom internal perisporiums of giving up contact, and the left-hand thread 6 lower, outer perimeter walls of giving up link to each other by screw thread with hanger cone 2 top internal perisporiums.When ball seat pipe 7 moved downward, lock ring 4 promptly disengaged with the left-hand thread 6 bottom internal perisporiums of giving up, and left-hand thread is given up be connected no longer closely between 6 bottoms and the hanger cone 2, and this moment, the upper lifting pipe post can trip out pit shaft with hanger hydraulic part, the part of giving up.Fail to slip out of the hand if give up, also can just change drilling tool, the hydraulic pressure and the part of giving up are tripped out pit shaft, thereby reduce accident rate effectively.On the lower piston ring periphery wall suit affixed outer sleeve 12, outer sleeve 12 bottoms link to each other with hanger cone 2 tops with outward flange by one-level shear pin 5, suit cushion rubber 1 on the cone periphery wall between hanger cone 2 outward flanges and outer sleeve 12 bottom surfaces.When injecting highly pressurised liquid in the central tube 11, under the effect of upper and lower piston ring, outer sleeve 12 moves downward, and cuts off one-level shear pin 5, then to lower compression cushion rubber 1, the radially complete distending of cushion rubber 1 is set on internal surface of sleeve pipe, sets easily.After secondary shear pin 8 was also cut off, then hanger cone 2 can remove highly pressurised liquid with respect to outer sleeve 12 motions, and cushion rubber 1 shrinks and gets final product deblocking, and deblocking is easy.

As shown in Figure 1, suit packing element upper isolating ring 3 on cone 2 periphery walls between cushion rubber 1 and outer sleeve 12 bottom surfaces, by being threaded, the cushion rubber 1 that packing element upper isolating ring 3 can mate differing heights is installed between packing element upper isolating ring 3 and the outer sleeve 12.Be positioned at and on cone 2 periphery walls of secondary shear pin 8 belows, outer sleeve 12 gingival cyst of mucous gland in the newborn be set and buckle, between cone 2 and outer sleeve 12, cooperate suit and buckle the opening lock ring 18 that is meshed with said gingival cyst of mucous gland in the newborn.Can prevent lock ring 18 so effectively along cone 2 rollbacks, thus the cushion rubber 1 that prevents distending rollback deblocking voluntarily, reach under slave mode, be easy to set, the purpose of deblocking.

Claims

1, a kind of big latus rectum sand control hanger, comprise hanger cone (2) and top connection pipe (17), it is characterized in that: in the top connection pipe (17), the bottom of periphery wall is set with affixed central tube (11) and cylinder sleeve (15), cooperate suit upper piston ring (16) in the annular fluid cylinder that constitutes between central tube (11) and the cylinder sleeve (15), being provided with one on central tube (11) the middle part periphery wall of upper piston ring (16) below is the liquid sealing engage sleeves and is contained in annular lip in the piston cylinder (14), the lower piston ring that matches for central tube (11) periphery wall with the annular lip below in piston cylinder (14) bottom, the periphery wall of piston cylinder (14) matches with cylinder sleeve (15) inwall; In upper and lower piston ring internal perisporium and end face intersection annular hydraulic cavities that indent is being set respectively separately, the inlet opening (13) that is connected with said hydraulic cavities is being set respectively on the tube wall of central tube (11); Connecting column casing shape left-hand thread give up (6) by becoming clasp (10) on central tube (11) peripheral edge of bottom, left-hand thread is given up and is liquid sealing in (6) top and cooperates suit the ball seat pipe (7) that is linked together by secondary shear pin (8), ball seat pipe (7) top has outward flange, left-hand thread is given up be provided with on the internal perisporium of (6) bottom ball seat pipe (7) outward flange is carried out spacing inward flange, the give up bottom of (6) of left-hand thread is vertical uniform setting and extends to the give up saturating groove of (6) bottom of left-hand thread, make left-hand thread (6) bottom of giving up be flap, on ball seat pipe (7) lower, outer perimeter wall by the lock ring that is being threaded (4), lock ring (4) periphery wall and the left-hand thread that is flap (6) bottom internal perisporium of giving up contacts, and left-hand thread (6) the lower, outer perimeter wall of giving up links to each other by screw thread with hanger cone (2) top internal perisporium; On the lower piston ring periphery wall suit affixed outer sleeve (12), outer sleeve (12) bottom links to each other with hanger cone (2) top with outward flange by one-level shear pin (5), and suit cushion rubber (1) on the cone periphery wall between hanger cone (2) outward flange and outer sleeve (12) bottom surface.

2, big latus rectum sand control hanger according to claim 1, it is characterized in that: suit packing element upper isolating ring (3) on cone (2) periphery wall between cushion rubber (1) and outer sleeve (12) bottom surface, between packing element upper isolating ring (3) and the outer sleeve (12) by being threaded.

3, big latus rectum sand control hanger according to claim 1, it is characterized in that: be positioned at and on cone (2) periphery wall of secondary shear pin (8) below, outer sleeve (12) gingival cyst of mucous gland in the newborn be set and buckle, the cooperation suit with said gingival cyst of mucous gland in the newborn and is buckled the opening lock ring (18) that is meshed between cone (2) and outer sleeve (12).