CN201170070Y

CN201170070Y - Oil manifold hanger

Info

Publication number: CN201170070Y
Application number: CNU2008200792918U
Authority: CN
Inventors: 马洪宇; 陈成才; 郭桥儒
Original assignee: China Petroleum and Natural Gas Co Ltd
Current assignee: China Petroleum and Natural Gas Co Ltd
Priority date: 2008-03-11
Filing date: 2008-03-11
Publication date: 2008-12-24
Anticipated expiration: 2018-03-11

Abstract

The utility model discloses a tubing hanger, belonging to the underground oil tube mating device for oil production. The tubing hanger consists of an upper joint, a center tube and a lower joint which are connected. An upper cone is connected with an adjusting ring. A slip recess is connected with a sleeve gasket. The slip is arranged between the upper cone and the slip recess. The tubing hanger is characterized in that an annular rubber spring is arranged between the upper joint and the upper cone. The sleeve gasket and a sealing seat are connected through saw-tooth threads, and are fixed together through cut nails. The tubing hanger has the advantages that the annular rubber spring is arranged between the upper joint and the upper cone; the sleeve gasket and the locking seat are respectively provided with saw-tooth threads, and the sleeve gasket and the locking seat are meshed together; the slip is always kept to be opened; the retractions of the slip and the cone are effectively prevented; the looseness of the slip is prevented; the suspension of the tubing hanger is more stable; the success ration of job execution can be improved; the reworking is avoided; and the production cost is reduced.

Description

A kind of boll-weevil hanger

Technical field

The utility model belongs to oil exploitation down-hole oil tube corollary apparatus.

Background technology

In oil exploitation, the down-hole oil tube anchoring device of various ways is arranged, as the down-hole oil tube anchor of rail mounted, screw pump oil pipe anchor, rotary oil pipe anchor, pretension waterpower oil pipe anchor, draining type oil pipe anchor etc.More than various oil pipe anchors be applicable to that oil pipe upper end is fixing, on casing wall, prevent that oil pipe from wriggling up and down or rotate by slips anchoring, but they are not suitable for all oil pipe are suspended on separately on the casing wall, with the state of oil pipe disengaging in use.In pumpingh well layering card water operation process, there is rollback phenomenon (generally having 2 millimeter rollback gaps) in the tight mechanism of its kayser, thereby can make slips loosening, cause suspension not firm, the top oil pipe often occurs and break away from back tubing string downslide, even the situation that drops to the shaft bottom takes place, and influences the oil well ordinary production, even causes the accident.

The utility model content

The purpose of this utility model provides a kind of boll-weevil hanger of the tight compensation arrangement of kayser that has, and uses this device that layering card water pipe post is suspended on the internal surface of sleeve pipe reliably.

Technical solution of the present utility model is to realize like this, a kind of boll-weevil hanger, be bound up successively by screw thread by top connection, central tube, lower contact and constitute, upper cone is bound up by screw thread and adjustable ring, slip spider is bound up by screw thread and sealing shroud, slips is installed between upper cone and the slip spider, its top is contained in the dovetail groove of upper cone, its underpart is contained in the dovetail groove of slip spider, its special character is that (1) is equipped with the rubber spring of annular between top connection and upper cone.(2) sealing shroud is bound up by saw-tooth thread and locking bed, has longitudinal slot at the saw-tooth thread place of locking bed, and sealing shroud is fixed together by shear pin and locking bed, locking bed by screw in lower contact.

The beneficial effects of the utility model are, (1) because the rubber spring (the tight compensation arrangement of seat kayser) of annular is housed between the bottom surface of top connection and upper cone, it is compressed under the effect of fluid pressure, after the fluid pressure cancellation, rubber spring just has certain expansion force, and it is downward to promote upper cone, all the time make slips keep complete open state, can prevent slips and cone rollback effectively, prevent to become flexible, be suspended on the internal surface of sleeve pipe reliably after layering card water pipe post and oil pipe are broken away from.

(2) because the inner surface in the sealing shroud bottom has saw-tooth thread, there is saw-tooth thread the locking bed outside, when when the effect lower sleeve gasket of fluid pressure and lower contact have produced relative displacement, inside and outside saw-tooth thread is interlocked mutually, guarantee that the mutual alignment between them can not return, can prevent further that slips is loosening, make the more firm of boll-weevil hanger suspension, avoid the generation of tubing string downslide and whereabouts phenomenon.By these measures, can improve the success rate of job execution, avoided the operation of doing over again, reduce production costs.

Description of drawings

Accompanying drawing is the structural representation that partly cuts open of the present utility model.

The specific embodiment

The internal thread that is connected with oil pipe uncoupling joint is arranged in the upper end of top connection 1, and its lower end is connected with central tube 5, lower contact 9 successively by screw thread, and four through hole 5a are arranged at central tube 5 bottoms, and there is the external screw thread that is connected with card water pipe post the lower end of lower contact 9.Adjustable ring 2 is connected with upper cone 3 by screw thread, and the lower surface of adjustable ring 2 is suspended on the boss of boss 1.The rubber spring 4 of annular is installed between top connection 1 and the upper cone 3.Upper cone 3 lower ends have four inclined-plane dovetail grooves, 15 ° of chamfered angle.The upper end of slip spider 7 has four inclined-plane dovetail grooves, 75 ° of chamfered angle, and its lower end is connected with sealing shroud 8 by screw thread, and sealing ring is installed between them.The cross section of slips 6 is swallow-tail forms, be installed between upper cone 3 and the slip spider 7, its top is contained in four inclined-plane dovetail grooves of upper cone 3, can slide along the dovetail groove inclined-plane, its underpart is contained in four inclined-plane dovetail grooves of slip spider 7, can slide along the dovetail groove inclined-plane.Sealing shroud 8 lower inner surface have saw-tooth thread, external surface on locking bed 11 tops has saw-tooth thread, the saw-tooth thread place of locking bed 11 has 12 longitudinal slots, be divided into 12 lobes, sealing shroud 8 and locking bed 11 are bound up by saw-tooth thread, by two shear pins 10 they are fixed, there are six tapped through holes locking bed 11 lower ends, are fixed in the lower contact 9 by six pins 12 again.Slip spider 7, sealing shroud 8 and lower contact 9 are formed seat card cylinder by the sealing ring sealing.

The use operating process of this boll-weevil hanger is: the card water seal that will go into the well earlier is series-connected to the lower end of this hanger lower contact 9 every organ pipe by screw thread, and the upper end of this boll-weevil hanger is connected to the lower end of oil pipe on-off connector joint.After the projected depth of the tubing string G.I.H after will connecting then, from dropping into bat in the oil pipe in the ball seat of card water pipe column bottom, tubing string is airtight, squeeze into highly pressurised liquid from oil pipe then, its pressure is 12～15MPa, after liquid enters this hanger by oil pipe, enter seat card cylinder by four through hole 5a on the central tube 5, under pressure, slip spider 7, sealing shroud 8 are up, and two shear pins 10 are cut off, when moving on the sealing shroud 8, shrink between locking bed 11 each lobe, because of it and locking bed 11 are interlocked by saw-tooth thread, sealing shroud 8 can not retreat.The inclined-plane dovetail groove is up opens at the promotion lower edge of slip spider 7 upper cone 3 for four slips 6, is engaged on the internal surface of sleeve pipe until slip insert, and rubber spring 4 is compressed simultaneously.Behind the release pressure, under the elastic force effect of rubber spring 4, the external facing of slips 6 tightly is engaged on the internal surface of sleeve pipe all the time, does not have at all loosening.Drop into bat again in the sliding sleeve of uncoupling joint, after squeezing into the pressure fluid on-off connector and separating, trip out the top tubing string, this boll-weevil hanger just can be suspended in the well every the organ pipe post firmly with blocking water seal.When needs play the card release water seal every the organ pipe post, be lowered to reversible and drag for lance, directly the upper lifting pipe post can be cut off six pins 12, and this moment, unfreezing was shunk in slips 6 whereabouts.

Claims

A kind of boll-weevil hanger, by top connection (1), central tube (5), lower contact (9) by the screw thread formation that is bound up successively, upper cone (3) is bound up by screw thread and adjustable ring (2), slip spider (7) is bound up by screw thread and sealing shroud (8), slips (6) is installed between upper cone (3) and the slip spider (7), its top is contained in the dovetail groove of upper cone (3), its underpart is contained in the dovetail groove of slip spider (7), it is characterized in that, the rubber spring (4) of annular is housed between top connection (1) and upper cone (3); Sealing shroud (8) is bound up by saw-tooth thread and locking bed (11), saw-tooth thread place at locking bed (11) has longitudinal slot, sealing shroud (8) is fixed together by shear pin (10) and locking bed (11), and locking bed (11) is fixed in the lower contact (9) by screw (12).