RU194352U1 - PACKER WITH CABLE INPUT - Google Patents

Abstract

The utility model relates to the field of hydrocarbon production, can be used to separate the annulus in the wells. The packer contains a barrel, an anchor, a sealing element in the form of ring cuffs. Outside the trunk, under the annular cuffs and the anchor, a longitudinal blind channel is made for wiring the power cable. The cuffs are made of soft and hard rubber and are positioned so that the soft rubber cuff is located between the hard rubber cuffs, and the power cable is placed by means of a seal with end stops. The bore of the packer is eccentric relative to the barrel of the packer. The proposed technical solution improves the reliability of the packer, extends the functionality of the packer.

Description

The utility model relates to the field of hydrocarbon production (oil, gas, condensate, etc.) and can be used to separate the annular space in production, gas lift or injection wells with leakage intervals with one or more production formations.

Known double-barrel packer with cable entry [RU No. 130342, published 07/20/2013], containing the outer and inner trunks, forming a cross-barrel space, in which there is a power cable, a sealing element, a sealant, a connecting unit located on the outer trunk with the possibility of movement and a housing (casing) located on the outer barrel above or below the sealing element opposite the connecting node with the possibility of movement. The housing is made with an opening with channels emerging from it, in one of which the power cable is hermetically fixed by means of a sealant consisting of a clamping element, at least one sealing element, and at least one stop element. In addition, the power cable in the channel of the housing is hermetically fixed along the armor or along the cores of the power cable by means of a sealing element. The sealing element is a sealing composition in the form of a compound. The packer is also further provided with a packer sealing element and / or an inlet at least one chemical injection line and / or at least one gas exhaust line installed in the inter-barrel space.

The disadvantages of the known technical solutions are the need to violate the integrity of the power cable for its placement and sealing in the packer, which entails the need for subsequent execution of cable splices, which increases the risk of depressurization of the cores and, as a result, failure of the submersible pumping equipment, as well as the relatively small diameter of the inner passage openings of the packer, which reduces its throughput and does not allow geophysical instruments and other underground equipment to pass through it That limits the functionality of the known packer.

Known packer with cable entry [RU 2540369, published 02/10/2015], taken as a prototype, containing the barrel, a sealing element in the form of compressible ring cuffs mounted on the barrel and an anchor. Outside the trunk, under the ring cuffs and the anchor, a longitudinal blind channel is made for conducting the power cable, and under the ring cuffs the cable is sealed in the channel hermetically by means of a compound. In the longitudinal channel with the power cable located in it, in the area under the annular cuffs, at the level of the outer surface of the barrel, a protective overlay of an arched profile is installed with the possibility of sealing with a semicircular crackers limited by displacement along the barrel along the barrel. On the edges of the longitudinal channel along the length of at least the expanded annular cuffs are made ledges that fix the position of the protective strip at the level of the outer surface of the barrel.

The disadvantages of the prototype are the lack of sealing of the cable due to the use of liquid sealants (compound), as well as the relatively small diameter of the inner bore of the packer, which reduces its throughput and does not allow geophysical instruments and other underground equipment to pass through it, which limits the functionality of the known packer .

The objective of the proposed technical solution is to increase the reliability of the packer by maintaining the integrity of the power cable line passing through the packer, increasing the functionality of the packer.

The technical result of the proposed technical solution is to increase the operational reliability of submersible pumping equipment by eliminating the need to violate the integrity of the power cable, ensuring its reliable sealing, expanding the functional capabilities of the packer by increasing the through hole.

To achieve a technical result, a packer containing a barrel, a sealing element in the form of compressible annular cuffs mounted on the barrel and an anchor. Outside the trunk, under the ring cuffs and the anchor, a longitudinal blind channel is made for conducting the power cable, and under the ring cuffs the cable is placed in the channel hermetically according to the utility model, the sealing element consists of a set of ring cuffs separated by spacers, while the cuffs are made of soft and hard rubber and are located so that the soft rubber cuff is located between the hard rubber cuffs and the power cable is sealed in the longitudinal blind channel by means of a seal the end of the packer is made eccentric relative to the barrel of the packer.

The use of a cable gland made of soft rubber hermetically fills the entire space between the cable and the blind channel, and ring cuffs made of hard rubber, in addition to sealing, protect cable seals from high radial loads and also prevent leakage of the ring cuff made of soft rubber.

The implementation of the bore of the packer eccentric allows you to make this hole of increased diameter with increased throughput. The increase in the passage channel (hole) of the packer allows you to pass through it various instruments, including geophysical, and also increases its throughput.

The utility model is illustrated by drawings, where in FIG. 1 shows a packer with cable entry, for clarity, with transverse and longitudinal sections. In FIG. 2 packer without installed ring cuffs. In FIG. 3 shows the power cable seal.

A packer with a cable entry includes a barrel 1 (Fig. 1, 2), on which a sealing assembly, which is a sealing assembly, is designed to tightly disconnect the two zones of the casing stem and seal the power cable.

The sealing assembly consists of annular cuffs 2 made of hard rubber, separated by spacers 3, which are fixed on the barrel by an abutment 4 and a nut 5, rigidly connected to the cone 6. Between the cuffs 2, through the spacers 3 a cuff 7 made of soft rubber is installed. The sealing unit and the barrel 1 with a blind longitudinal channel 8 (Fig. 1, 2) form a tight space between themselves, in which the cable 9 is placed. In the zone of the tight space, the cable 10 is sealed on the cable (Fig. 1, 2, 3), end stops 11 (Fig. 1, 2) are installed at the edges of the seal 10 and prevent the seal from moving and leaking out. Cable seals 10 may be more than one, with each seal, for ease of installation, has a section 12 (Fig. 3). The inner bore 13 (Fig. 1) of the packer relative to the housing is eccentric, which allows this bore to be made with an increased diameter, thereby increasing the packer throughput. To assemble the packer, a cone 6, a mechanical anchor 14 and a connector 15 are installed on the barrel 1 on one side, and a nut 5 on the opposite side.

Packer with cable entry works as follows.

Before launching and installing the packer into the well, the packer will be disassembled by nodes. A power cable 9 with a coupling (not shown) is passed through dismantled components and parts, then the cable is connected to a submersible electric motor (PEM). After the descent of the electric centrifugal pump (ESP) with tubing (tubing), to the place of installation of the packer in the tubing string, a partial assembly of the packer is performed. Install the cone 6, the mechanical anchor 14 and the connector on one side on the barrel 1, and the nut 5 on the opposite side. Next, twist the nut 5 and cone 6 between themselves, after which the sealing assembly is installed on the packer, the cable 9 with previously sealed seals 10 is laid in the barrel channel 8, on the cable. Install end stops 11 along the edges of the cable glands 10 to prevent their displacement and leakage. The ring cuffs are mounted on the packer so that the soft rubber cuff 7 is between the hard rubber cuffs 2 while the cuffs are separated by spacers 3. Connector 15, mounted on the lower end of the barrel, ensures that the bottom of the packer is connected to the tubing string without rotation. The packer descends into the well at the tubing string. When packing with the help of axial manipulations, the mechanical armature 14 is activated, the grippers of the armature moving apart in the radial direction are engaged with the casing. After that, an axial load is applied to the packer down from the weight of the tubing, which is transmitted to the annular cuffs. The cuffs deform and seal the annulus, while simultaneously transferring the load to the cable seal. In this position, the sealed packer is ready for use.

Placing the cable outside the barrel in the proposed blind channel under the annular cuffs allows the packer to be installed in the well without violating its integrity, since the internal diameters of the holes in the parts of the sealing assembly, emphasis, spacers, nut and cone allow the cable to pass through them and not to separate the cable into two parts with their subsequent splicing, at the same time it allows to seal cables with an increased cross-section, such types as 3 × 25 with the commonly used types of cross-section 3 × 16.

The soft cuff is designed for tight separation of the intervals of the casing string. The proposed cable sealing technology allows you to maintain continuity of the line and the integrity of the cable armor, significantly reducing the risk of damage to the cable insulation during operation. The increased diameter of the passage opening expands the functionality of using the packer, allowing known equipment having large external dimensions to be lowered through the packer.

Claims (1)

A packer with a cable entry, comprising a trunk, a sealing element in the form of compressible ring cuffs mounted on the barrel and an anchor, a longitudinal blind channel for conducting the power cable is made outside the barrel under the ring cuffs and anchor, the cable being sealed in the channel under the ring cuffs, characterized in that that the sealing element consists of a set of ring cuffs separated by spacers, while the cuffs are made of soft and hard rubber and are located so that the cuff of soft rubber p spolagaetsya between seal of hard rubber, and the power cord is located in a blind longitudinal passage through hermetically seal with the end stops, the through hole formed eccentrically with respect to the packer packer bore.

Images