CN2711377Y

CN2711377Y - Subsidizing device for unlimited extending casing

Info

Publication number: CN2711377Y
Application number: CN 200420077479
Authority: CN
Inventors: 崔德忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-12
Filing date: 2004-07-12
Publication date: 2005-07-20
Anticipated expiration: 2014-07-12

Abstract

The utility model provides a subsidizing device for unlimited extending casing, mainly solving the problem that the subsidizing metal tubes and casings of the existing expansion type subsidizing devices are combined with looseness, small range of application and poor sealing effect. The subsidizing device for unlimited extending casing is characterized in that a leading wire (2) is screwed with a first slip seat (5) with a built-in first slip insert (7), the first stage slip insert (7) is connected with a secondary slip seat (9) with a taper sleeve (16) and a built-in secondary slip insert (6), and the first and the secondary slip seats (5, 9) are connected with a two-stage slip propelling sleeve (10) in the inner sides of the slip seats through pins (8); the outer wall of a subsidizing tube (12) is provided with a separation stand, and the outer walls of two ends of the separation stand are fixed with upper and lower sealing metal rings (13, 14); the secondary slip seat (9) and the upper sealing seat (15) are respectively sheathed with two ends of the subsidizing tube (12) and respectively contracted with the lower and upper sealing metal rings (14, 13). The subsidizing device for unlimited extending casing has the advantages of firm combination between the subsidizing metal tube and the casing, large range of application and favorable sealing effect.

Description

The unlimited casing patching device that prolongs

Technical field:

Used sleeve pipe damaged the subsidy bracing means when the utility model related to well workover in the oil recovery field, oil field, belonged to a kind of unlimited prolongation casing patching device.

Background technology:

In the oil field well workover process, oil well sleeve pipe damaged location often adopts the subsidy device to repair.The casing patching reinforcing mode mainly adopts expansion type subsidy device both at home and abroad at present, subsidize comprising metal bellows, soft metal subsidy and explosive shaping subsidy mode, these devices all are to be close on the internal surface of sleeve pipe after utilizing the expanding metal pipe that its external diameter is increased, produce sealing effectiveness and block the leak source of casing damaged well tube, use through long-time, the running string collision produces loosening, leakage, phenomenon such as come off, it is little that these several modes are born external and internal pressure, internal pressure is less than 20Mpa, external pressure is less than 15Mpa, subsidy metal tube and thimble joint is insecure, and the easy bit freezing that is hampered during following brill can not add the pressure of the drill and pass through; The scope of application is little (has only 5 ¹/ ₂" sleeve pipe), can not prolong (below 10 meters) arbitrarily; If internal surface of sleeve pipe is oval in addition or other is irregularly shaped, after the subsidy of expansion type subsidy device, the subsidy metal tube can not be fully and the sleeve pipe applying, and sealing effectiveness is poor.

The utility model content:

Insecure in order to overcome existing expansion type subsidy device subsidy metal tube and thimble joint, the scope of application is little, the deficiency of sealing effectiveness difference, the utility model provides a kind of unlimited prolongation casing patching device, it is big that this unlimited prolongation casing patching device bears external and internal pressure, it is firm to have subsidy metal tube and thimble joint, and the scope of application is big, the characteristics of good sealing effect.

The technical solution of the utility model is: this infinitely prolongs the casing patching device and comprises center push pipe, subsidy pipe and upper seal support, seat envelope shearing ring and slips tube that push pipe lower end, center connects hold-down ring successively, blocks mutually with guide shoe, the be threaded one-level slip spider of the built-in one-level slip insert that blocks mutually with shearing ring of guide shoe, the one-level slip insert is by the secondary slip spider of pin connecting band tapered sleeve and built-in secondary slip insert, and a secondary slip spider all advances cover to link to each other by the inboard twin-stage slips of pin and its; Subsidy pipe outer wall has every platform and be fixed with the upper-lower seal metal ring on the outer wall at platform two ends, subsidy pipe two ends respectively with place it in secondary slip spider and upper seal support link to each other with pin, the upper-lower seal metal ring touches mutually with secondary slip spider and upper seal support respectively.

The utlity model has following beneficial effect: owing to take such scheme, after the subsidy pipe arrived the subsidy position down, liquid entered in the envelope instrument liquid cylinder by tubing string.Because the pressure apply piston drives pull bar, pull bar drives working body part upstroke, fluid cylinder row motion under pressure, present envelope instrument of subsidy instrument and working body relative motion produce under the effect of pressure, compression metallic packing ring up and down makes its external diameter expansion, closely is attached to and produces sealing effectiveness on the internal surface of sleeve pipe; Because not impaired sleeve-shaped limited after the upper-lower seal metal ring was extruded, good sealing effect, it is big to bear external and internal pressure, and the subsidy pipe is firm with thimble joint; The subsidy pipe can adopt screwed connection, can infinitely prolong, and " above sleeve pipe, the scope of application is big can to subsidize 4.If the subsidy instrument is hampered, can adds the pressure of the drill in right amount and pass through.

Description of drawings:

Accompanying drawing 1 is a structural representation of the present utility model.

1-slips tube among the figure, 2-guide shoe, 3-shearing ring, the 4-hold-down ring, 5-one-level slip spider, 6-secondary slip insert, 7-one-level slip insert, 8-pin, 9-secondary slip spider, 10-twin-stage slips advances cover, 11-center push pipe, and 12-subsidizes pipe, the last sealed eyelet of 13-, 14-lower seal metal ring, 15-upper seal support, 16-tapered sleeve.

The specific embodiment:

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

As shown in Figure 1, the casing patching device be should infinitely prolong and center push pipe 11, subsidy pipe 12 and upper seal support 15 comprised, seat envelope shearing ring 3 and slips tube 1 that push pipe 11 lower ends in center connect hold-down ring 4 successively, block mutually with guide shoe 2, the be threaded one-level slip spider 5 of the built-in one-level slip insert 7 that blocks mutually with shearing ring 3 of guide shoe 2, one-level slip insert 7 is by the secondary slip spider 9 of pin 8 connecting band tapered sleeves 16 and built-in secondary slip insert 6, one secondary slip spider (5,9) all advances cover 10 to link to each other by the inboard twin-stage slips of pin 8 and its; Subsidy pipe 12 outer walls have every platform and be fixed with upper-lower seal metal ring (13 on the outer walls at platform two ends, 14), subsidy pipe 12 two ends respectively with place it in secondary slip spider 9 and upper seal support 15 link to each other with pin 8, upper-lower seal metal ring (13,14) touches mutually with secondary slip spider 9 and upper seal support 15 respectively.

During actual the use, after the subsidy pipe arrived the subsidy position for 12 times, liquid entered in the envelope instrument liquid cylinder by tubing string.Because the pressure apply piston drives pull bar, pull bar drives working body part upstroke, fluid cylinder row motion under pressure, present envelope instrument of subsidy instrument and working body relative motion produce under the effect of pressure, compression is metallic packing ring (13 up and down, 14) make its external diameter expansion, closely be attached to and produce sealing effectiveness on the internal surface of sleeve pipe; Because not impaired sleeve-shaped limited after upper-lower seal metal ring (13,14) was extruded, good sealing effect, it is big to bear external and internal pressure, and subsidy pipe 12 is firm with thimble joint; Subsidy pipe 12 can adopt screwed connection, can infinitely prolong, and " above sleeve pipe, the scope of application is big can to subsidize 4.If the subsidy instrument is hampered, can adds the pressure of the drill in right amount and pass through.

Claims

1, a kind of unlimited prolongation casing patching device, comprise center push pipe (11), subsidy pipe (12) and upper seal support (15), center push pipe (11) lower end connects hold-down ring (4) successively, seal shearing ring (3) and slips tube (1) with the seat that guide shoe (2) blocks mutually, it is characterized in that: the be threaded one-level slip spider (5) of the built-in one-level slip insert (7) that blocks mutually with shearing ring (3) of guide shoe (2), one-level slip insert (7) is by the secondary slip spider (9) of pin (8) connecting band tapered sleeve (16) and built-in secondary slip insert (6), one secondary slip spider (5,9) all advances cover (10) to link to each other by the inboard twin-stage slips of pin (8) and its; Subsidy pipe (12) outer wall has every platform and be fixed with upper-lower seal metal ring (13 on the outer wall at platform two ends, 14), subsidy pipe (12) two ends respectively with place it in secondary slip spider (9) and upper seal support (15) link to each other with pin (8), upper-lower seal metal ring (13,14) touches mutually with secondary slip spider (9) and upper seal support (15) respectively.