CN208106376U - A kind of mechanical separate stratum fracturing packer of oil well band guiding - Google Patents

Abstract

An oil well belt-guiding mechanical layered fracturing packer, which relates to the technical field of oil field production tools; two ends of a center pipe are respectively fixed with an upper joint and a lower joint, and one side of the upper joint and the outside of the central pipe are provided with several There is a spacer ring between the rubber tubes, a limit sleeve is installed on one side of the rubber tube at the end, a cone is set between the limit sleeve and the slips, and a slip sheath is set on one side of the slips. There is a ball blocking sleeve inside the tile sheath, and a locking puppet is arranged between the ball blocking sleeve and the central tube, steel balls are installed inside the locking puppet, and a first spring is provided on the outer sleeve of the locking puppet; One side of the slip sheath is provided with a centralizing block, a second spring is installed in the centralizing block, a slip ring is provided on one side of the centralizing block, and a slip ring pin is worn inside the slip ring. The utility model has good temperature and pressure resistance performance, the rubber cylinders on both sides can be well sealed, the middle rubber cylinder can play a righting role, the sealing and pressure bearing capacity is strong, the reliability is good, and the validity period is long.

Description

A kind of oil well belt guide mechanical layered fracturing packer

technical field

The utility model relates to the technical field of oilfield exploitation tools, in particular to an oil well zone-guided mechanical layered fracturing packer.

Background technique

A packer refers to an elastic sealing element, which is used to isolate the annular space between the pipe string of various sizes and the wellbore and between the pipe strings, and isolate the production layer to control the production (injection) fluid and protect the downhole of the casing. tool. In oil production engineering, the packer is used for delamination. The packer is designed with an oil production channel. When setting, the piston sleeve goes up, and the oil production channel is opened; after setting, the pressure of the upper layer acts on the balance piston, pushing the rubber cylinder upward. The unsealing pin is protected from shearing force; when unsealing, the unsealing pin is sheared by the friction between the rubber tube and the casing, the piston sleeve goes down, and the oil production channel is closed.

In order to develop the gas field efficiently, it is necessary to combine the upper and lower paleo-layered fracturing and acidizing for production; Layered fracturing with mechanical packer is the main method of layered fracturing currently applied.

The existing mechanical packer is a single rubber cylinder, which has poor sealing pressure bearing capacity, small setting compression force, poor reliability and short validity period.

Utility model content

The purpose of the utility model is to aim at the defects and deficiencies of the prior art, and provide a simple in structure, reasonable in design and easy to use oil well belt guiding mechanical layered fracturing packer.

In order to achieve the above purpose, the technical solution adopted by the utility model is: it includes an upper joint, a central tube, a spacer ring, a rubber tube, a limit sleeve, a cone, slips, a slip sheath, a first spring, a locking short section, ball retaining sleeve, steel ball, righting block, second spring, slip ring, slip ring pin, lower joint; the two ends of the central tube are respectively fixed with an upper joint and a lower joint, one side of the upper joint, the center There are several rubber tubes on the outside of the tube, and spacers are arranged between the rubber tubes. A limit sleeve is installed on one side of the rubber tube at the end. A cone is set between the limit sleeve and the slips. One side of the slips is set with a Slip sheath, there is a ball stop sleeve inside the slip sheath, a locking pup is set between the ball stop sleeve and the center tube, steel balls are installed inside the lock pup, and the outer sleeve of the lock pup is provided with A first spring; a centralizing block is provided on one side of the slip sheath, a second spring is installed in the centralizing block, a slip ring is provided on one side of the centralizing block, and slip ring pins are worn inside the slip ring.

Preferably, the slips are installed on the slip seat, and one end of the slip seat is installed between the slip sheath and the locking nipple.

Preferably, the centralizing block is installed on the centralizing block seat, and a centralizing block sheath is installed on the left side of the centralizing block seat.

Preferably, the locking nipple is provided with through holes for installing steel balls, and the outer wall of the central tube is provided with positioning grooves for positioning steel balls.

Preferably, the number of the rubber cartridges is three, and the length of the rubber cartridges is 165-175 mm.

When the utility model is in operation, setting: After lowering the utility model to a predetermined depth, lift the string according to the required setting height and then lower the string, relying on the friction force between the centralizing block and the casing wall to move along the track groove of the central pipe , the slip ring pin moves from the top dead center of the short groove to the top dead center of the long groove. At this time, the cone stretches the slips and clamps them firmly on the casing wall, and continues to lower the pipe string to compress the rubber tube so that the rubber The diameter of the barrel becomes larger to seal off the oil and the annular space of the casing; unsealing: the oil pipe string is lifted up, and the slip ring pin moves to the bottom dead point. Retract unpack.

After adopting the above-mentioned structure, the beneficial effects produced by the utility model are as follows: the oil well zone-guided mechanical layered fracturing packer described in the utility model has good temperature and pressure resistance, and the rubber barrels on both sides can be well The utility model has the advantages of simple structure, reasonable setting and low production cost.

Description of drawings

Fig. 1 is a structural diagram of the utility model.

Explanation of reference signs:

Upper joint 1, central tube 2, spacer ring 3, rubber tube 4, limit sleeve 5, cone 6, slip 7, slip seat 8, slip sheath 9, first spring 10, locking nipple 11 , block ball sleeve 12, steel ball 13, righting block sheath 14, righting block seat 15, righting block 16, second spring 17, slip ring 18, slip ring pin 19, lower joint 20.

Detailed ways

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

As shown in Figure 1, this specific embodiment adopts the following technical scheme: it includes an upper joint 1, a central tube 2, a spacer ring 3, a rubber tube 4, a limit sleeve 5, a cone 6, slips 7, and slip guards. Sleeve 9, first spring 10, locking short joint 11, ball blocking sleeve 12, steel ball 13, righting block 16, second spring 17, slip ring 18, slip ring pin 19, lower joint 20; the central pipe The two ends of 2 are respectively fixed with an upper joint 1 and a lower joint 20, one side of the upper joint 1 and the outside of the central tube 2 are provided with several rubber cartridges 4, spacers 3 are arranged between the rubber cartridges 4, and the rubber cartridges 4 at the end A limit sleeve 5 is installed on one side of the stop sleeve 5, a cone 6 is arranged between the limit sleeve 5 and the slip 7, a slip sheath 9 is arranged on one side of the slip 7, and a ball blocking sleeve is arranged inside the slip sheath 9 12. There is a locking nipple 11 between the ball blocking sleeve 12 and the central tube 2, a steel ball 13 is installed inside the locking nipple 11, and a first spring 10 is set outside the locking nipple 11; One side of the slip sheath 9 is provided with a righting block 16, and a second spring 17 is installed in the righting block 16, and a slip ring 18 is arranged on one side of the righting block 16, and a slip ring pin 19 is provided inside the slip ring 18.

Preferably, the slips 7 are installed on the slip seat 8 , and one end of the slip seat 8 is installed between the slip sheath 9 and the locking nipple 11 .

Preferably, the centralizing block 16 is installed on the centralizing block seat 15, and the centralizing block sheath 14 is installed on the left side of the centralizing block seat 15.

Preferably, the locking nipple 11 is provided with a through hole for installing the steel ball 13 , and the outer wall of the central tube 2 is provided with a positioning groove for positioning the steel ball 13 .

Preferably, the number of the rubber cartridges 4 is three, and the length of the rubber cartridges 4 is 165-175 mm.

When this specific embodiment is in operation, setting: After lowering this specific embodiment to a predetermined depth, lift the string according to the required setting height and then lower the string, and rely on the friction between the centralizing block 16 and the casing wall to move along the center pipe. The track groove moves, and the slip ring pin 19 moves from the top dead point of the short groove to the top dead point of the long groove. At this time, the cone 6 spreads the slip 7 and clamps it firmly on the casing wall, and continues to lower the pipe string. Compress the rubber cartridge 4 to increase the diameter of the rubber cartridge to seal off the oil and casing annular space; unsealing: lift the oil pipe string up, the slip ring pin 19 moves to the bottom dead center, at this time the cone 6 exits the slip 7, and the slip ring 7 retract and unblock, and at the same time, the rubber cartridge 4 also retracts and unseals.

After adopting the above-mentioned structure, the beneficial effects of this specific embodiment are as follows: the oil well zone-guided mechanical layered fracturing packer described in this specific embodiment has good temperature and pressure resistance, and the rubber cylinders on both sides can It is well sealed, the intermediate rubber tube can play a righting role, the seal has strong pressure bearing capacity, good reliability, and long validity period. This specific embodiment has the advantages of simple structure, reasonable setting, and low production cost.

The basic principles and main features of the utility model and the advantages of the utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (5)

1. a kind of oil well band is oriented to mechanical separate stratum fracturing packer, it is characterised in that：It include top connection, central tube, spacer ring, Packing element, limit sleeve, cone, slips, slips sheath, the first spring, lock pipe nipple, set of blocking, steel ball, wiper block, second spring, Slip ring, slip ring pin, lower contact；The both ends of the central tube are respectively fixed with top connection and lower contact, the side of top connection, The outside of central tube is provided with several packing elements, and spacer ring is provided between packing element, and the side of the packing element of end is equipped with limit sleeve, limit It is provided with cone between position set and slips, the side of slips is provided with slips sheath, set of blocking is provided in slips sheath, is blocked It is provided with locking pipe nipple between set and central tube, locks in pipe nipple and steel ball is installed, the outer cover for locking pipe nipple is equipped with the first bullet Spring；The side of the slips sheath is provided with wiper block, and second spring is equipped in wiper block, and the side of wiper block is provided with Slip ring is equipped with slip ring pin in slip ring.

2. a kind of oil well band according to claim 1 is oriented to mechanical separate stratum fracturing packer, it is characterised in that：Described Slips is mounted on slip spider, and one end of slip spider is mounted between slips sheath and locking pipe nipple.

3. a kind of oil well band according to claim 1 is oriented to mechanical separate stratum fracturing packer, it is characterised in that：Described Wiper block is mounted on righting block, and wiper block sheath is equipped on the left of righting block.

4. a kind of oil well band according to claim 1 is oriented to mechanical separate stratum fracturing packer, it is characterised in that：Described The through-hole for installing steel ball is provided on locking pipe nipple, the lateral wall of central tube is provided with the locating slot for steel ball positioning.

5. a kind of oil well band according to claim 1 is oriented to mechanical separate stratum fracturing packer, it is characterised in that：Described The quantity of packing element is three, and the length of packing element is 165~175mm.