Device for lowering devices into a well

FIELD: mining industry.

SUBSTANCE: device has post with mounting holes along circle, forks with aperture for holding fork relatively to post, roller and stopper. Upper portion of post and lower portion of fork are made in form of disc, are combined by axes and have mounting apertures along even circle along axis in a way, that angle between post apertures was different from angle between fork apertures.

EFFECT: higher durability, higher precision, higher efficiency, broader functional capabilities, higher personnel and equipment safety.

1 ex, 3 dwg

 

The present invention relates to the oil industry and is used for deep research wells without excess pressure on the mouth.

Known estuarine roller for injection wells containing the guide roller and bracket with the centering flange (Studies of flow and liquid absorption capacity of the reservoir. Blazhevich, VA, Fahreen I.A., Glazkov, A. M. - the Bowels, 1969. - P.56). The design of the roller can not deep down devices in the annular space of wells due to the lack of mechanism for regulating the distance between the hole for the descent of the device and a fixing hole to plan the puck wellhead.

Known design wellhead roller, allowing you to modify this distance 7 times, since the bracket is made of two-unit from the rack and plug the rollers did with the lifts Ainmal-8 and 11, Baku). The rack is made in the form of a sector of a circle has several (7) mounting holes around the perimeter and attached to the plan-the washer is screwed through one of several holes in the plan-washer well. The plug has a single return hole for fixing the rack and fork with the roller in the desired position by means of the stopper.

Operation of the wellhead roller has demonstrated the inadequacy of the seven mounting holes for precise alignment of the scraper wire (KAB is La) relative to the hatch opening. The location on the rack more of the mounting holes is impossible for two reasons. First, the large size will not fit in the limited space well with a wellhead valves. Secondly, large dimensions weight construction of the entire device.

In addition, there is a difference in position of the scraper wire relative to the descent of the hole during the descent and ascent of the underlying instrument. This difference is explained by the property of the deployed wire to resist bending and the presence of friction wire and instrument in the borehole and the contained fluid. Therefore, when the shutter unit scraper wire wrapping around the roller at a greater diameter than when lifting. This leads to the loss of alignment of the wire with the rise and subsequent touch the wire on the sharp edge of hatch openings (all holes for draining devices are threaded with a sharp edge).

Constant friction scraper wire on the edge of the reentry hole reduces its strength characteristics, it leads to the cliff with a drop of the device into the well.

The purpose of the invention is to increase the number of recorded positions of the rack and fork with roller while simultaneously reducing the metal device. This goal is achieved by the fact that the known device for lowering depth of the instrument in the borehole containing the rack with the pilot who advised holes around the circumference, plug with mating hole for fixing the fork relative to the rack, the roller and stopper, changed so that the top of the stand and the lower part of the fork is made in the form of a disc, aligned with the axis and have the mounting holes is equal to the circumference of the wheel axis so that the angle between the holes of the plug differs from the angle between the holes of the rack.

Device for lowering instruments into the well is depicted in figure 1. Section component parts of the device are given in figure 2 and figure 3. The device consists of a roller 1, plug 2, the rack 3, the stopper 4. Male 2 hour and 3 are connected to the hinge axis 5. To equal the circumference from the common axis of the plug 5 and hour have mounting holes. Angle α between the holes of the fork a few degrees different from the angle β between the holes of the rack. This angular offset distances allows to increase the number of recorded positions of the fork and rack with the help of get through-hole and the stopper 4.

Example: α-β=4,5°then by turning the plug 2 relative to 3 hours at 90° their through holes will match 20 times (90°:4,5°).

Device for lowering instruments into the well operates as follows. By mutual location of the well hole deep descent of the device and lift with winch designed device is mounted on the plan-washer SLE the new well with a bolted 3 hours. The plug 2 with the roller 1 is rotated on the axis 5 relative to the rack 3 with the possibility of fixing every α-β degrees to achieve the optimum position. The optimal position of the plug relative to the rack provides vertical descent scraper wire through the center hole for draining devices. The optimal position of the plug 2 and hour 3 rigidly fixed stopper 4. Coming from optimum holes for fixing the fork and rack are at an angular distance of α-β degrees, i.e., 3-5°. This is considerably lower than in the prototype, where this angle is 90°:(n-1), where n is the number of holes on the rack. Under normal seven holes the desired angle is 15°.

Due to the difference between α and β only a few degrees for lowering and lifting device with different tension scraper wire the opportunity to use one of the two adjacent through holes of the device for better centering of the wire.

Thus, the proposed device is better than the prototype performs its technical purpose - allows you to lower and raise deep unit without friction scraper wire on the sharp edge of the well hole. Positive technical result is achieved due to job a small difference in the angles between the mounting holes of the rack and fork and devices. Change the design of the product at the same time reduced its dimensions and weight from 10 to 7.8 kg

Technical and economic efficiency of the device is formed by extending the service life of the scraper wire, reducing the number of breaks and the cost of removing fallen into the well of the devices.

Device for lowering instruments into the well containing the rack with the mounting holes around the circumference, the plug with mating hole for fixing the fork relative to the rack, the roller and stopper, characterized in that the upper rack and the lower part of the fork is made in the form of a disc, aligned with the axis and have the mounting holes is equal to the circumference of the wheel axis so that the angle between the holes of the rack is different from the angle between the holes of the fork.



 

Same patents:

FIELD: oil industry.

SUBSTANCE: all equipment-hoisting operations are performed during underground well maintenance prior to lowering pumping equipment. Equipment is mounted in tail piece lowered into well. After extraction of pumping equipment from the well, end piece with closed end is lowered, having calculated length, dependent on depth of perforation range. Then specially made branch pipe is lowered into well with slit outlet for geophysical cable. Branch pipe with slit outlet is rigidly connected to pipe pumping filter. Then equipment is lowered into tail piece in such a way, that geophysical cable was inserted through slit outlet into behind-pipe area of well. Further, pumping equipment is lowered, including tubing string, well sucker-rod pump and bars column suspension. In such a way, equipment is effectively positioned in tail piece, and connection to secondary equipment is maintained through geophysical cable, connected to tubing string by braces.

EFFECT: higher safety.

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EFFECT: higher efficiency.

4 cl, 2 dwg

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EFFECT: higher efficiency.

3 cl, 1 dwg, 1 tbl

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The centralizer // 2221142
The invention relates to devices for research exploration and wells geophysical methods, and is intended for centering borehole instruments in the string of drill pipes

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FIELD: oil production equipment, particularly means for performing tripping processes under increased pressure, for thawing frozen wells and hydrate blocks inside wells.

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FIELD: well drilling equipment, particularly light or superlight drilling rigs.

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8 dwg

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EFFECT: increased working efficiency and improved production standards.

8 dwg

FIELD: oil production industry, particularly for pulling and running the oil-well tubing.

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FIELD: mining industry, particularly devices specially adapted for blasthole drilling during sinking and supporting mine tunnels.

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EFFECT: increased efficiency of blasthole drilling.

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FIELD: mining industry.

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FIELD: mining industry.

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EFFECT: higher reliability, higher personnel safety, higher serviceability.

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FIELD: mining industry.

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EFFECT: higher reliability, higher personnel safety, higher serviceability.

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FIELD: mining industry.

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EFFECT: higher reliability, higher personnel safety, higher serviceability.

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EFFECT: prevented pollution, higher productiveness.

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