CN201934054U

CN201934054U - Novel bridge plug made of composite material

Info

Publication number: CN201934054U
Application number: CN2011200582733U
Authority: CN
Inventors: 黄会方; 程市君; 陶风; 龚文冲
Original assignee: JINGZHOU SUNRISE ENERGY TECHNOLOGY Co Ltd
Current assignee: JINGZHOU SUNRISE ENERGY TECHNOLOGY Co Ltd
Priority date: 2011-03-08
Filing date: 2011-03-08
Publication date: 2011-08-17
Anticipated expiration: 2021-03-08

Abstract

The utility model relates to a bridge plug, in particular to a novel bridge plug made of a composite material, which is used for oilfield downhole sealing construction and has quickly drilling performance. The novel bridge plug made of the composite material comprises a central pipe, an upper slip, a lower slip, an upper cone body, a lower cone body, a middle rubber sleeve, a lock cap and the like; the middle part of the central pipe is provided with the middle rubber sleeve; both ends of the central pipe are respectively provided with the upper slip and the lower slip; both sides of the middle rubber sleeve are respectively provided with an end rubber sleeve A and an end rubber sleeve B; one side of the upper slip is provided with the upper cone body, and the other side of the upper slip is provided with a setting back ring; and one side of the setting back ring is provided with the lock cap through a stopping pin. After pressure is pumped through the ground, the novel bridge plug made of the composite material can be sent to a preset position through a cable; the lock cap structure on the bridge plug can maintain the stability after the bridge plug is set; and the novel bridge plug made of the composite material solves the problem that an existing metal bridge plug cannot be sent to the preset position through the cable in a horizontal well, and has the characteristics of high temperature resistance, high pressure resistance, short drilling time and outstanding milling performance.

Description

A kind of bridging plug of NEW TYPE OF COMPOSITE material

Technical field

The utility model relates to a kind of bridging plug, is specifically related to a kind of down-hole, oil field shutoff construction that is used for, and has the bridging plug that quick brill removes the NEW TYPE OF COMPOSITE material of performance.

Background technology

The effect of bridging plug is to be used for oil gas well seal, and it is few to have a working procedure, and the cycle is short, card envelope position characteristic of accurate.Owing to have these advantages, replaced the technology of former cementing plug sealing layer position, become the Pressure Curve in Oil Testing Well shutoff and tried layer, return the main technique of formation testing on carrying out.In recent years, because the development of horizontal well drilling technology, the needs that net horizontal section increased production transformation are obvious day by day.Utilizing speed brill bridging plug to carry out the horizontal well in segments transformation also becomes a kind of advanced person and increasingly mature construction technology, and traditional metal bridging plug removes difficulty because it bores in this technology, and it is inapplicable to have become.

At present, domestic common material metal bridging plug is all used the casting pig manufacturing, and common bridging plug of milling often needs to spend a few hours even time a couple of days, and the metal fragment after the milling is than great, and the row of returning is difficult.Especially in the segmentation of horizontal well was transformed, a bite well often will be lowered to a lot of bridging plugs.In addition, the common metal bridging plug can't be lowered to the precalculated position by cable in horizontal well.Therefore, it is outstanding to design a kind of high temperature resistant, high pressure resistant, milling performance, by the surface pump pressurization pressure, bridging plug is just seemed particularly important by the composite bridging plug that cable is sent to the precalculated position.

Summary of the invention

The purpose of this utility model is: at the deficiencies in the prior art, provide a kind of high temperature resistant, high pressure resistant, the time of bore removing is short, the milling performance is outstanding, and by the surface pump pressurization pressure, bridging plug can be sent to the bridging plug of the NEW TYPE OF COMPOSITE material in precalculated position by cable.

The utility model is to realize above-mentioned purpose by the following technical solutions:

A kind of bridging plug of NEW TYPE OF COMPOSITE material, it by central tube, upper slips, lower slips, upper cone, lower cone, middle gum cover, lock nut, set back of the body ring and constitute, it is characterized in that: gum cover in the middle of be equipped with the middle part of central tube, the two ends of central tube are separately installed with upper slips and lower slips, the both sides of middle gum cover are separately installed with end gum cover A and end gum cover B, between one side of upper slips and the end gum cover A upper cone is housed, between upper cone and the end gum cover A outer back band A and interior back band A is housed; The opposite side of upper slips is equipped with and sets back of the body ring, and a side that sets back of the body ring back of the body ring is equipped with lock nut by backing pin, and the central tube termination of lock nut one side is provided with the connection pin; Between end gum cover B and the lower slips lower cone is housed, back band B and outer back band B in being equipped with between lower cone and the end glue B cover, the central tube of lower slips one side is provided with rubber ring; Be separately installed with spacer ring A and spacer ring B between gum cover and end gum cover A and the end gum cover B in the middle of described, be respectively arranged with shear pin on upper cone and the lower cone.

The beneficial effects of the utility model are:

The utility model can use at horizontal well or diameter well by novel project organization, goes up the lock nut structure that is provided with by the bridge match, can keep the stability after the bridge match sets; The utility model adopts organic group insulating laminated sheet material or inorganic based insulating laminated sheet material to make, be reinforcing material with wood pulp insulating paper, coton paper, cotton, synthetic fibers goods in the organic group insulating laminated sheet material, be applicable to the shutoff construction of low temperature (below 120 ℃) shallow well; In the inorganic based insulating laminated sheet with inorganic glass fiber cloth, alkali-free glass fibre felt etc. as reinforcing material, have good brill and remove performance and relative high intensity, be applicable to that the shutoff of high temperature (121 ℃-177 ℃) deep-well is constructed; Adopt the bridging plug of this NEW TYPE OF COMPOSITE material to be used for the shutoff construction of down-hole, oil field, can shorten greatly and bore the time of removing, step simplifies the operation; And cooperate the cable perforating gun, can realize fix a point selective perforating and pressure break, the chip after brill mills is the row of returning easily.

Description of drawings

Accompanying drawing is the structural representation of the bridging plug of NEW TYPE OF COMPOSITE material.

Among the figure: 1, central tube, 2, backing pin, 3, lock nut, 4, set back of the body ring, 5, upper slips, 6, upper cone, 7, outer back band A, 8, interior back band A, 9, end gum cover A, 10, spacer ring A, 11, middle gum cover, 12, spacer ring B, 13, end gum cover B, 14, interior back band B, 15, outer back band B, 16, lower cone, 17, lower slips, 18, shear pin, 19, connect pin, 20, rubber ring.

The specific embodiment:

The bridging plug of this NEW TYPE OF COMPOSITE material by central tube 1, upper slips 5, lower slips 17, upper cone 6, lower cone 16, middle gum cover 11, lock nut 3, set back of the body ring 4, backing pin 2, end gum cover A10, end gum cover B13 and constitute, the both sides that gum cover 11 in the middle of be equipped with the middle part of central tube 1, the two ends of central tube 1 are separately installed with upper slips 5 and lower slips 17. middle gum covers 11 are separately installed with end gum cover A9 and end gum cover B13.

Between one side of upper slips 5 and the end gum cover A9 upper cone 6 is housed, between upper cone 6 and the end gum cover A9 outer back band A7 and interior back band A8 is housed; The opposite side of upper slips 5 is equipped with and sets back of the body ring 4, and a side that sets back of the body ring 4 is equipped with lock nut 3 by backing pin 2, and central tube 1 termination of lock nut 3 one sides is provided with and connects pin 18.

Between end gum cover B13 and the lower slips 17 lower cone 16 is housed, back band B14 and outer back band B15 in being equipped with between lower cone 16 and the end glue B13 cover, the central tube 1 of lower slips 17 1 sides is provided with rubber ring 20.

Be separately installed with spacer ring A10 and spacer ring B12 between middle gum cover 11 and end gum cover A9 and the end gum cover B13, be respectively arranged with shear pin 18 on upper cone 6 and the lower cone 16.

During the construction of the bridging plug of this composite with supporting cable or hydraulic setting instrument by being connected pin 18 connections on the central tube 1, provide by setting tool to set strength.When net horizontal section is gone into the well, adopt cable to be lowered to, because bridging plug is in the agravic effect of horizontal segment, the rubber ring 20 of unique design can seal with sleeve pipe, under the annular pressure effect, instrument can be sent into the precalculated position.During bridging plug work; connection pin 18 on the central tube 1 is connected with setting tool; set back of the body ring 4 and be subjected to downward thrust; to set strength and pass to upper slips 5 successively; upper cone 6; outer back band A7; interior back band A8; end gum cover A9; middle gum cover 11; lower cone 16; lower slips 17; reach when setting value setting strength; shear pin 18 on the upper cone 6 is cut off; upper slips 5 and lower slips 17 break; sting on casing wall; end gum cover A9; expand in end gum cover B13 and middle gum cover 11 stressed backs; seal with casing wall; outer back band A7; interior back band A8 and interior back band B14; stressed the opening of outer back band B15; the end gum cover A9 that protection is expanded; end gum cover B13 and middle gum cover 11, the connection pin 19 on the central tube 1 is cut off, and bridging plug and setting tool are thrown off.After bridging plug set, central tube 1 formed an integral body by lock nut 3 and bridging plug, bear from above or below pressure reduction, to keep the stability after the bridge match sets.

Claims

1. the bridging plug of a NEW TYPE OF COMPOSITE material, it is by central tube (1), upper slips (5), lower slips (17), upper cone (6), lower cone (16), middle gum cover (11), lock nut (3), setting back of the body ring (4) constitutes, it is characterized in that: gum cover (11) in the middle of be equipped with the middle part of central tube (1), the two ends of central tube (1) are separately installed with upper slips (5) and lower slips (17), the both sides of middle gum cover (11) are separately installed with end gum cover A(9) and end gum cover B(13), one side of upper slips (5) and end gum cover A(9) between upper cone (6) is housed, upper cone (6) with hold gum cover A(9) between outer back band A(7 is housed) and interior back band A(8); The opposite side of upper slips (5) is equipped with and sets back of the body ring (4), and a side that sets back of the body ring (4) is equipped with lock nut (3) by backing pin (2), and central tube (1) termination of lock nut (3) one sides is provided with and connects pin (19); End gum cover B(13) and between the lower slips (17) lower cone (16) is housed, lower cone (16) and end gum cover B(13) between be equipped with in back band B(14) and outer back band B(15), the central tube (1) of lower slips (17) one sides is provided with rubber ring (20); Gum cover (11) and end gum cover A(9 in the middle of described) and hold gum cover B(13) between be separately installed with spacer ring A(10) and spacer ring B(12), be respectively arranged with shear pin (18) on upper cone (6) and the lower cone (16).