SU1439205A1 - Well repair method - Google Patents

Abstract

The invention relates to a slide industry and improves the efficiency of a method for repairing wells equipped with sucker-rod pumps. with excessive pressure at the mouth. The downhole pump (SI) 1 is pressed against the column of rods, pulling them through the upper 9 and lower 6 detachable seals. Moreover, pulling the rods through the lower seal 6 is carried out continuously until it stops against the SI 1. Next, install the wellhead chamber (CC) 8c with the upper seal 9 on the lower seal 6 with the last rod connected to the CH 1. Periodic communication of MC B with the well and with the atmosphere is carried out. Then CH 1 is placed in CC B, and after overpressure has been relieved from it, disassembly of CC B along with SC 1 is special. The latter is replaced with a new one. The discharge of CH 1 into the well is carried out in the reverse order. 6 silt (С ± Э Л

Description

4 0 WITH

sd

LU V /

1

ten

20

1 1439205

The invention relates to the mining industry, in particular to the technology of repairing wells equipped with sucker-rod pumps, with an overpressure at the wellhead.

The aim of the invention is to simplify the technology of well repair by carrying out repair work without first killing the wells.

Figures 1 to 6 show the sequence of operations for lifting to the surface of a pump suspended on pump rods in a tubing of a pump-compressor tubing.

Pump 1 is suspended in tubing string 2 at sucker rods 3,

At the wellhead, under the gland seal 4 of polished rod 5, there is a detachable sealing gasket b with sealing elements 7. During the repair, the gland seal L is replaced with the wellhead chamber 8 with the upper seal 9.

Sealing detachable seal 6 has a bypass valve (not shown), with which you can transfer downhole pressure into the internal space of the wellhead chamber 8.30 doser: bones,

: The internal dimensions of the wellhead chamber B are selected based on the conditions of placement of the pump 1 therein.

Well repair is carried out as follows.

The initial position of the surface and well; equipment shown in fig 1

Before lifting the column of pump rods 3, the annular space between them and the tubing string 2 is sealed. with the help of sealing elements 7. After this, the stuffing box seal 4 is dismantled, for which purpose the polished rod 5 is disconnected from the suspension of the pumping unit and from the rod of pump rods 3 (FIG. 2),

Then, lifting and unscrewing the column of pump rods 3 is performed, dragging each of them through the sealing elements 7.

The last pumping rod 3 connected directly to the pump 1 is pulled through the sealing

split seal 6, With the help of the upper seal 9 mounted on the mouth chamber 8, they seal the exit point of the pumping rod 3 from the well chamber 8 (figure 4),

After installation and sealing of the wellhead chamber 8 at the mouth of its inner space, the valve of the sealing sealant seal 6 is repositioned via a bypass to the wellbore with pressure.

Then the sealing elements 7 are opened and the pump 1 is lifted into the wellbore chamber 8, pulling the pump rod 3 through the upper seal 9 (FIG. 5), press the sealing elements 7 after the pump 1 into the wellhead chambers 8 and the excess pressure in the wellhead chamber 8 is vented d atmospheric (Fig, 6),

Then, the orifice chamber 8 is detached 25 from the housing of the sealing sealer 6 and replaced with oil from 1.

The descent of the replaced pump I into life is realized in the reverse direction.

 invented

35

40 .c

The method of repair of wells, including the rise of the well; the pump on the number of rods, pulling them through the ve and the lower detachable seals and the wellhead installed between them

camera, periodic communication with the well and the atmosphere, the lock of the blue pump and its descent about the well, which is different in that, in order to improve the efficiency of the repair method, equipped with sucker rod, with excessive pressure on the wellhead, dragging The columns of the stem through the lower detachable seal are carried out uninterruptedly up to the stop of the borehole pump; after the installation, the wellhead with the upper seal is installed on the lower detachable seal when connected to the well pump

50

elements 7, left the pump 1 under the ni-. barbell, then the pump is placed in

mi (fig, 3)

The last sucker rod 3 is guided to an orifice chamber 8, which is connected to the housing of the sealing

The wellhead chamber and after relieving excessive pressure from it, dismantling the wellhead chamber together with the pump.

detachable seal 6, using the upper seal 9 mounted on the mouth chamber 8, seal the exit point of the pump rod 3 from the mouth chamber 8 (figure 4),

After installation and sealing of the wellhead chamber 8, its inner space is communicated with well pressure through the bypass valve of the sealing plug sealer 6 at the mouth.

doser: bones,

Then the sealing elements 7 are opened and the pump 1 is lifted into the wellbore chamber 8, dragging the last sucker rod 3 through the upper liner 9 (FIG. 5). Seal: After the pump 1 has been placed in the wellhead chamber 8, the excess chamber 8 bleed to atmospheric (FIG. 6),

Then, the wellhead chamber 8 is detached from the housing of the sealing plug-in seal 6 and the pump 1 is replaced with a new one.

The descent of the replaced pump I into the well is realized in the reverse after the invention.

.with

The method of repairing wells, including the rise of a well; the pump on the rod string, pulling them through the upper and lower detachable seals and the wellhead installed between them

camera, periodically communicating it with the well and with the atmosphere, replacing the well of the blue pump and lowering it back into the well, characterized in that, in order to improve the efficiency of the method of repairing the wells equipped with sucker rod pumps, with an overpressure at the mouth, pulling the rods of the rods through the lower detachable seal are carried out uninterruptedly against the stop of the borehole pump, after which the wellhead chamber with the upper seal is installed on the lower detachable seal when the pump is connected om last

The wellhead chamber and after overpressure bleeding from it, the wellhead chamber is dismantled together with the pump.

Фа2.2

eight,

. .

W7 / W7

one

FIG. 6

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Compiled by A. Keibal Edited & V. Bugrenkova V. Tehred M. Didyk Proofreader M. Maksimishinets

Order 6047/29 Circulation 531 Subscription

VPIIPI USSR State Committee

for inventions and discoveries N3035, Moscow, Zh-35, Raushsk nab., 4/5

 / Bfig. 6

Claims (1)

Claim A method of repairing wells, including raising the downhole; pump on the rod string, dragging them through the upper and lower split seals and the wellhead chamber installed between them, periodically communicating with the well and the atmosphere, replacing the well pump and lowering it back into the well, characterized in that, in order to increase efficiency Methods of repairing wells equipped with sucker rod pumps with overpressure at the mouth, dragging the rod string through the lower split seal are carried out continuously until they stop, dragging each of them through the sealing 7. elements, The last pump rod 3, connected directly to the pump 1, is dragged through the sealing elements 7, leaving the pump 1 under them (Fig. 3). A wellhead chamber 8 is directed to the last pump rod 3, which is connected to the casing of the well pump that seals it, after which the well chamber with the upper seal is installed on the lower split seal with the last rod connected to the well pump, then the pump is placed in the well chamber and after bleeding from overpressure carry out the dismantling of the wellhead chamber together with the pump.