CN202194619U

CN202194619U - Cement squeezing bridge plug for hydraulic setting in one trip

Info

Publication number: CN202194619U
Application number: CN2011202360520U
Authority: CN
Inventors: 刘巾
Original assignee: KARAMAY TELONG OIL FIELD TECHNOLOGY SERVICE Co Ltd
Current assignee: KARAMAY TELONG OIL FIELD TECHNOLOGY SERVICE Co Ltd
Priority date: 2011-07-06
Filing date: 2011-07-06
Publication date: 2012-04-18
Anticipated expiration: 2021-07-06

Abstract

The utility model discloses a cement squeezing bridge plug for a hydraulic setting in one trip, comprising a bridge plug body with a central tube, wherein an insertion tube is installed in the central tube; a slide sleeve shell tube is connected to the lower end of the central tube via a thread; the lower end of the slide sleeve shell tube is closed to be planar; the outer periphery of the lower part of the central tube is bulged outwards to be annular, so as to compose a piston; and a piston cylinder is sleeved outside the lower part of the central tube in a slide matching manner. The cement squeezing bridge plug for a hydraulic setting in one trip disclosed by the utility model is integrally connected with the piston, so that a squeezing pressure is prevented from upwards jacking the insertion tube via the piston, thereby ensuring no phenomenon of failed squeezing work in any condition.

Description

The hydraulic base sealed squeeze method bridging plug of one-trip string

Technical field

The utility model relates to the hydraulic base sealed squeeze method bridging plug of the squeeze method bridging plug, particularly one-trip string that use in a kind of oil field prospecting development process.

Background technology

Often will carry out the squeeze method shutoff to the stratum of having penetrated out in the oilfield explorating developing process, this operation will be used the squeeze method bridging plug.The squeeze method bridging plug has tubing string twice to accomplish cement squeeze work, also has one-trip string to accomplish cement squeeze work.One-trip string is obviously than tubing string efficient is higher twice, and particularly in deep-well and ultradeep well, one-trip string squeeze method bridging plug can shorten the activity duration and save operating cost.One-trip string squeeze method bridging plug also divides two kinds at present: a kind of is mechanical block envelope squeeze method bridging plug; A kind of is hydraulic base sealed squeeze method bridging plug.Mechanical block envelope squeeze method bridging plug lean on rotation and on put and put tubing string and realize the bridge plug seat envelope, the bridging plug slips gets up distinguish slips hoop with iron wire, if therefore in being lowered to process, be hampered, is easy to midway that seat seals (do not arrive precalculated position take one's seat envelope).Appearance seat envelope midway just must be bored bridging plug, and is next more again, delays a large amount of activity durations, increases operating cost.The hydraulic base sealed squeeze method bridging plug of one-trip string can significantly reduce the probability of seat envelope midway, because the bridging plug slips is whole slips, rather than the distinguish slips, general being hampered (resistance is in 5000kg) is seat envelope midway to occur.But the hydraulic base sealed squeeze method bridging plug of one-trip string that uses at present is that seat is sealed instrument and intubate connects together; Squeeze pressure can make progress through the piston on the seat envelope instrument to the stratum squeeze method time like this, and (piston area is big for the tip cutting pipe; Therefore the fluid pressure that receives is very big); If intubate up a little, thereby will spur the up squeeze note passage of closing of sliding sleeve, cement squeeze work can't be carried out.The way that addresses this problem at present is to add a lot of tubing string weight to intubate, to prevent that intubate from being ejected.But, all can cause the operation failure for shallow well (tubing string is in light weight can't to apply a lot of weight to intubate) and stratum squeeze pressure too high (it is too big to go up top power).The applicant had once developed a " a kind of oil field formation testing shutoff packer ", had obtained China Patent Right, to its suitable in addition improvement, can solve this problem demanding prompt solution.

Summary of the invention

The purpose of the utility model is to provide a kind of one-trip string hydraulic base sealed squeeze method bridging plug, can guarantee can occur in no instance the phenomenon of squeeze note operation failure effectively.

The purpose of the utility model is to realize like this; The hydraulic base sealed squeeze method bridging plug of one-trip string; Comprise the bridging plug body with central tube, the central tube lower end is through the sliding sleeve housing pipe that is being threaded, and sliding sleeve housing pipe lower end closed is the plane; The lower, outer perimeter edge evagination of central tube constitutes piston ringwise, and the suit that is slidingly matched outside the central tube bottom a piston rod.

The utility model uses operating procedure following: 1, instrument is gone into well: the squeeze method bridging plug needs intubate is inserted the bridging plug inner chamber before going into well; Sliding sleeve is backed down (be on the sliding sleeve eyelet align with eyelet on the sliding sleeve housing) in the intubate lower end, is fixedly connected with shear pin between intubate and the bridging plug.Be communicated with the oil jacket annular space in the oil pipe in the process of going into the well, so bridging plug can carry out the circulation of well liquid at any time in being lowered to process.2, seat envelope bridging plug: when bridging plug down when predetermined seat seals the position; In oil pipe, throw one piece of steel ball from ground, treat that steel ball falls into the ball seat in the intubate after, apply hydraulic pressure with the pump truck rail; Pressure raises step by step; Deng bridging plug fully seat be honored as a queen and continue rising pressure ball seat is hit down to the sliding sleeve bottom, oil pipe this moment annular space inner and below the bridging plug is communicated with, the annular space more than the bridging plug is sealed by bridging plug.3, squeeze method: earlier intubate is proposed (upper lifting force is greater than the shearing force of shear pin) in bridging plug; Direct circulation pump cement in well then; When treating that the cement leading edge arrives the bridging plug position, following drain line inserts intubate the bridging plug inner chamber and backs down sliding sleeve, begins the pit shaft squeezing off below bridging plug.4, tubing string is proposed: after the cement squeeze note finishes (promptly having beaten displacement fluid); On carry oil pipe intubate proposed the bridging plug inner chamber; Intubate is carried in the process its thick head at first to drive sliding sleeve up last, gets back in the initial groove until sliding sleeve distinguish elastic claw, and sliding sleeve is locked in this position; Eyelet on eyelet on the sliding sleeve and the sliding sleeve housing staggers and by the sealing ring between them sealing, and cement and stratum below the bridging plug are closed.After this can the squeeze method tubing string be proposed all to propose the oil gas well.

The utility model has carried out suitable improvement to the structure of " a kind of oil field formation testing shutoff packer "; Piston and bridging plug are fused; Avoid squeeze pressure through tip cutting pipe on the piston, thereby guaranteed to occur in no instance the phenomenon of squeeze note operation failure.

Description of drawings

To combine accompanying drawing that the utility model is done further detailed explanation below.

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

The specific embodiment

The hydraulic base sealed squeeze method bridging plug of one-trip string, as shown in Figure 1, comprise bridging plug body with central tube 1, intubate 5 is installed in the central tube 1.Central tube 1 lower end is through the sliding sleeve housing pipe 10 that is being threaded, and sliding sleeve housing pipe 10 lower end closed are the plane.The lower, outer perimeter edge evagination of central tube 1 constitutes piston 3 ringwise, and the suit that is slidingly matched outside central tube 1 bottom a piston rod 2.

The suit that is slidingly matched in the sliding sleeve housing pipe 10 a sliding sleeve pipe 9, and the alternative inside and outside eyelet of linking up or isolating is being set respectively on the two tube wall, and sliding sleeve pipe 9 upper ends constitute grasping follower 6; Cooperate suit one by the fixing seat blocking seat 8 of shear pin in intubate 5 lower ends, seat blocking seat 8 is in order to load bearing seat envelope steel ball 7.

One annular groove 4 is being set on the top internal perisporium of sliding sleeve housing pipe 10, and the upper end outer rim of grasping follower 6 outwards protrusion snaps in the described annular groove 4, and when being in this position, grasping follower 6 can not move upward again.

The utility model fuses piston and bridging plug, has avoided squeeze pressure through tip cutting pipe on the piston, thereby has guaranteed can occur in no instance the phenomenon of squeeze note operation failure.

Claims

1. the hydraulic base sealed squeeze method bridging plug of one-trip string; Comprise bridging plug body with central tube; The central tube lower end is through the sliding sleeve housing pipe that is being threaded; It is characterized in that: sliding sleeve housing pipe lower end closed is the plane, and the lower, outer perimeter edge evagination of central tube constitutes piston ringwise, and the suit that is slidingly matched outside the central tube bottom a piston rod.