CN201650203U - Double rubber-barrel isolation packer - Google Patents

Abstract

The utility model relates to a double rubber-barrel isolation packer which comprises an upper connector, a central shaft and an upper rubber barrel sleeved on the central shaft, wherein an upper thrust mechanism and an upper locking mechanism are respectively arranged at the upper part of the central shaft; and the double rubber-barrel isolation packer is characterized in that a lower connector is connected at the lower part of the central shaft, a lower rubber barrel, a lower thrust mechanism and a lower locking mechanism are respectively sleeved between the central shaft and the lower connector, wherein the lower thrust mechanism comprises a lower lock sleeve, a lower adjusting ring and a lower wedge-shaped ring which are respectively sleeved on the central shaft in sequence, and the lower locking mechanism comprises a central shaft and a lower lock sleeve and a locking ring which are respectively sleeved on the central shaft. The utility model has the advantages that the packer achieves the purpose that the double sets of the thrust mechanisms are pushed by the well completion fluid through a group of pressure transfer holes to cause the two groups of the rubber barrels to be respectively expanded at the upper part and the lower part of the packer to clamp the casing pipe, ensures the reliable setting and the smooth working of the well-completion operation and enhances the sealing performance and the reliability of the upper and the lower oil and gas reservoirs during the well-completion operation; and the packer is simple and convenient to operate and secure and reliable in sealing, increases the hanging force and ensures the operating efficiency of production.

Description

Two packing element isolation packers

Technical field

The utility model belongs to oil field industry completion downhole tool manufacturing technology field, particularly designs a kind of pair of packing element isolation packer.

Background technology

The present used isolation packer of oilfield well completion, mainly be to constitute by top connection, lower contact, central tube and the last packing element of installing thereof, above-mentioned packer only is provided with cover thrust mechanism and one group of packing element, its sealing performance will reduce greatly, and occur poorly sealed problem easily, can't will go up oil and gas reservoir and following oil and gas reservoir separately.If isolation packer is poorly sealed, subsequent treatment operation more complicated; Because the isolation packer tubing string suspension force of single cover packing element is limited, can directly influence production operation efficiency so in addition.

Summary of the invention

To provide a kind of packing element to set reliable, easy and simple to handle and can strengthen two packing element isolation packers of its suspension force with sealing performance in order to solve the technical problem that exists in the known technology for the utility model.

The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is: two packing element isolation packers, comprise top connection, the central axis that is connected with top connection and be sleeved on last packing element on the central axis, central axis top be provided with by on cambridge ring, the top thrust mechanism that adjusted ring and last lock tube constitute and by central axis, the top locking mechanism that last lock tube and lock ring constitute, it is characterized in that: described central axis bottom is connected with lower contact, between central axis and lower contact, be set with lower rubber cylinder, bottom thrust mechanism and bottom locking mechanism, described bottom thrust mechanism is for being sleeved on the following lock tube on the central axis successively, following adjustable ring and following cambridge ring, described down locking mechanism comprises central axis and is sleeved on following lock tube and lock ring on the central axis, the described down adjustable ring lock tube that is threaded down, it is affixed that last lock tube and following lock tube pass through pin.

The utility model can also adopt following technical scheme: also be evenly equipped with a plurality of pressure transmission holes on the described central axis.

The described lock tube inner surface of going up is by sealing ring and central axis sealing.

Described lock tube down middle part is provided with damping hole.

Advantage and the good effect that the utlity model has are: because the utility model adopts technique scheme, this packer has realized that completion fluid promotes two cover thrust mechanisms by one group of pressure transmission hole, make two groups of packing elements at the upper and lower part of packer difference spreading, block sleeve pipe, assurance sets reliably, and completion practice can be carried out smoothly.Improve the sealing and the reliability of upper and lower oil and gas reservoir in the completion practice process.This packer is not only easy and simple to handle, packing element sets and sealingly secure is reliable, and strengthens its suspension force and guaranteed production operation efficiency.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Among the figure: 1, top connection; 2, go up cambridge ring; 3, go up packing element; 4, upper support ring; 5, adjusted ring; 6, go up lock tube; 7, lock ring; 8, shear pin; 9, central axis; 10, following lock tube; 11, lower contact; 12, damping hole; 13, following adjustable ring; 14, sealing ring; 15, lower support ring; 16, following cambridge ring; 17, lower rubber cylinder.

The specific embodiment

For further understanding summary of the invention of the present utility model, characteristics and effect, now exemplify following examples, and conjunction with figs. is described in detail as follows: see also Fig. 1, two packing element isolation packers, comprise and be top connection 1 cylindraceous, the central axis 9 that is threaded with top connection and be sleeved on last packing element 3 on the central axis, central axis top be provided with by on cambridge ring 2, the top thrust mechanism that adjusted ring 5 and last lock tube 6 constitutes and by central axis 9, the top locking mechanism that last lock tube 6 and lock ring 7 constitute also is separately installed with upper support ring 4 and lower support ring 15 in the central axis upper and lower.Described central axis bottom is connected with lower contact 11, between central axis and lower contact, be set with lower rubber cylinder 17, bottom thrust mechanism and bottom locking mechanism, described bottom thrust mechanism is for being sleeved on the following lock tube 10 on the central axis, following adjustable ring 13 and following cambridge ring 16 successively, described down locking mechanism comprises central axis 9 and is sleeved on following lock tube 10 and lock ring 7 on the central axis, the described down adjustable ring lock tube that is threaded down, it is affixed that last lock tube 6 and following lock tube 10 pass through shear pin 8.Last lock tube inner surface forms sealing by O RunddichtringO 14 and central axis 9.Described central axis middle part also is evenly equipped with a plurality of pressure transmission holes, and in the present embodiment, the central axis middle part is evenly equipped with 4 pressure transmission holes.Described lock tube 10 middle parts down are provided with damping hole 12.

Two packing element isolation packers, top connection and following end joint all are to link together by screw thread and sealing drum, can be connected the position that needs of completion flow string combination.When two packing element isolation packers and completion tubular column together behind the lower going-into-well, when the pressure transmission hole of the pressurizing port of service tube-column and two packing element isolation packer inside center axles is in the same annular seal space, completion fluid promotes two cover thrust mechanisms by pressure transmission hole, make two groups of packing elements at the upper and lower part of packer difference spreading, block sleeve pipe.Meanwhile going up lock tube 6 and following lock tube 10, to drive lock rings 7 mobile on the screw buckle of central axis 9, when set put in place after, lock ring 7 rests on the screw thread place of central axis 9, can not fall back, and thrust mechanism is locked.For vacuum occurring in the process that guarantees two packing elements and bobbin seal, following lock tube is provided with damping hole 12.Set finish after, observe annular space and lost returns by injecting completion fluid.Guarantee the sealing of upper and lower oil and gas reservoir, improved completion practice efficient.

Claims (4)

1. two packing element isolation packer, comprise top connection, the central axis that is connected with top connection and be sleeved on last packing element on the central axis, central axis top be provided with by on cambridge ring, the top thrust mechanism that adjusted ring and last lock tube constitute and by central axis, the top locking mechanism that last lock tube and lock ring constitute, it is characterized in that: described central axis bottom is connected with lower contact, between central axis and lower contact, be set with lower rubber cylinder, bottom thrust mechanism and bottom locking mechanism, described bottom thrust mechanism is for being sleeved on the following lock tube on the central axis successively, following adjustable ring and following cambridge ring, described down locking mechanism comprises central axis and is sleeved on following lock tube and lock ring on the central axis, the described down adjustable ring lock tube that is threaded down, it is affixed that last lock tube and following lock tube pass through pin.

2. according to claim 1 pair of packing element isolation packer is characterized in that: also be evenly equipped with a plurality of pressure transmission holes on the described central axis.

3. according to claim 1 pair of packing element isolation packer is characterized in that: the described lock tube inner surface of going up is provided with sealing ring.

4. according to claim 1 pair of packing element isolation packer is characterized in that: described lock tube down middle part is provided with damping hole.