SU832053A1 - Clips - Google Patents

Description

(54) SLIPS

one

The invention relates to the study of wells with deep-well instruments, lowered with the help of fishing slips both on a cable-cord and on a wire, and can be used in the oil and gas industry.

A known safety device for lowering and removing removable devices from a well, comprising a housing and a stem mounted therein, between which a gripping device made in the form of a rod is placed. A spring is placed between the rod and the housing, which rests against the annular protrusion of the rod with its lower end and the upper end against the stop. The stem has a protrusion, and the head is screwed on the lower end of the stem. The locking pins, nipple, bushing, spring loaded spring and the lock body are interoperable. In the nipple is made ledge and groove. In the upper part of the lock body, there is a conical surface for interacting with the gripping device tl.

The disadvantage of the catcher is that there is a need to pre-install the nipple in the elevator pipes, and this is due to

co-lifting operations of elevator pipes, after which it is possible to carry out tripping operations by a safety device.

Closest to the present invention is an Easeen comprising a body, a working piston with a rod, spring-loaded plates installed with the possibility of reciprocating relative to the body, and a hydraulic time relay including upper and lower chambers interconnected by a capillary L2. .

Before lowering the slips into the well, mineral oil is poured into the chamber under the piston. In case of high pressure and temperature in the well, the air chamber is filled with compressed air through the charging nipple. The amount of pressure is adjusted depending on. most of the time needed to eliminate the accident.

Extraction of emergency pipes or devices by slips is performed as follows. By lowering the slips into the well, the device is captured; if the device that is seized does not rise, it is released with the help of a hammer. To do this, the wire, which is lowered on the slip, is loosened and the rod goes down, then the cable (wire) dramatically pulls up and the rod goes up, hit the anvil of the percussion mechanism. After several blows, the released emergency device rises to the surface. If the emergency device is not removed with the help of a hammer, it becomes necessary to release the spike from it and lift it to the surface. For this purpose, a piston with a rod and a time relay, which begins to work immediately after the descent of the slips into the well, is designed. The well pressure on the piston, which squeezes the oil through the capillary into the air chamber, rises. The stroke time of the piston is controlled by the length of the capillary and the back pressure of the air flow in the chamber, at the end of the stroke of the piston the rod engages with the sleeve and squeezes the spring, lifts it and releases the dies, which, under the action of the weight of the slip, rise and exit from the ground with the emergency device The drawbacks of the fishing rod are the unreliability of work and the impossibility of lowering the research equipment into the well, since before each descent of the fishing rod it is necessary to fill the lower chamber with oil, which leads to clogging of holes the absence of a separating piston also contributes to the clogging of the capillary holes in the hydraulic valve. The purpose of the invention is to increase the reliability of the slip by preventing the capillary from clogging up and making it possible not only to lift the emergency devices from the wells, but also to descend them for investigation and then to the surface. This goal is achieved by the fact that the sleeper is provided with a separation pore with a stitch installed in the upper chamber of the hydraulic time relay and a tapered bushing connected to the lower end of the rod, the inner surface of the dies having a tapered surface for interacting with the tapered bushing. The drawing shows the schemp. The slip includes a housing 1 with a conical funnel 2 in the lower part, dies 3 with spring rings 4 and 5 placed in the lower part of the housing 1 above the funnel 2, a taper sleeve b associated with the lower end of the rod 7 with the working piston 8. Upper part The rod 7 is placed in the air chamber 9. The rod 7 has a flange at the lower end to rest in the tapered bushing 6 as it moves upwards. Above the piston 8 there is a lower chamber 10 filled with liquid. In the upper part of the housing 1 there is a hydraulic time relay, which consists of a capillary 11, connected with a liquid lower chamber 10 and with an air upper chamber 12, in which a separating piston 13 is installed. Above the upper chamber 12 of a hydraulic time relay accommodates the slips head 14 with a charging device 15. With the use of a slip in the oil fields, several types of work can be performed, such as the elimination of accidents associated with the breakage of the scrapers in the well, as well as the launching of instruments for well testing with subsequent lifting m them to the surface. Schlips works as follows. When lifting devices in emergency situations, the slips are lowered into the well on a wire or on a cable. Charger device 15 is closed. The piston 13 is in the lower position. Descending down, under its own weight, the slips by the funnel 2 is lowered onto the head of the emergency device, which is fixed by dies 3. The lifting of the emergency device to the surface begins. The time of descent and raising of the slips should be calculated at the time of operation of the hydraulic time relay. If the device cannot be removed with a slip (in cases, for example, when an emergency device has caught at the bottom of a well), it becomes necessary to release the slip from the emergency device and lift it to the surface. The pressure of the well fluid presses on the piston 7 with piston B. The piston 8 begins to move upward, displacing the fluid from chamber 10, through capillary 11 into chamber 12 under the separation piston 13, which also. starts moving up. The rod 7 with the piston 8, lifting up, lifts the tapered bushing 6, which, lifting, expands the dies 3, releasing the emergency device, then lifts the slip to the surface. During the descent of the testing equipment into the well to a predetermined depth, the charging device 15 is closed before the descent. The piston 8 with the rod 7 is in its lowest position. The head of the instrument restraint or the instrument itself is fastened in a slip between the dies, after which they are lowered into the well. The pressure of the borehole fluid presses on the rod 7 with the piston 8, which begins to move upward, displaces the fluid, from chamber 10, through the capillary 11 into chamber 12 under the separation piston 13, which begins to move upwards. In this case, the rod 7 with its side rests against the conical sleeve 6 and begins to lift it viaTb, pushing the die 3. The device

or the holding device is released. Shlips lift up.

When lifting the holding device with the device from a predetermined depth, the charging device is opened before descending 15. The piston 8 with the rod 7 is in the extreme upper position. The device on the cable down into the well. Descending under its own weight, the CLIP funnel 2 is lowered onto. the head of the holding device, which is fixed by the dies 3. The pressure of the well through the charging device presses on the separation piston 13, which squeezes the liquid through the capillary 11 into the chamber 10 and presses on the piston 8. with the rod 7. The rod 7 moves downwards and enters the head of the holding device ;, presses on its rod and releases the holding device from engagement with the walls of the well. After that, they begin to rise to the surface.

The proposed slip can be performed as well as for the elimination of accidents in the well / and for lowering the instruments for well testing.

Claims (2)

1. Author's certificate of GGCP 638707, cl. Е 21 В 31/00, 1970. 2. USSR author's certificate 5 № 250800, cl. E 21 V 31/02, 1968 (prototype).