RUS
| UKR
| DonNTU |
Master's
portal of DonNTU
Ukraintsev Artyom
Mining - geology
department
Chair tehnologіya that tehnіka rozvіdki
rodovisch korisnih copaline
Speciality "Drilling"
Development of a hydraulic packer for use in downhole submersible
hydraulic pump
Scientific adviser: Pilipec Viktor
Theme of master's work:
Development of packer for use in downhole submersible hydraulic
pump
The
lack of reliable techniques for pumping from wells, resulting in
significant costs that are associated with the production of liquid
minerals from great depths. Currently applied in construction-tion
packers are designed primarily for the oil industry, but in geological
exploration industry is also a problem with the rise of a liquid with a
high of depth so you need to develop a device that should allow the
extraction of liquids from great depths with relatively small diameters
break -turbing the device.
To
develop a packer, which should:
1. reliably cover the wellbore;
2. without significant hydraulic
resistance to pass through itself out attracts fluid;
3. uncouple operation to uncover and
retain in the open position the sealing element in the work of the
hydraulic pump;
4. ensure the reliable installation
of submersible pump in the packer.
Improvement
of the technical ways to pump fluid from a depth of 1500 m and the
technology of pumping.
1. Analysis of existing technical
facilities for pumping from wells-Jin.
2. Development of the device to be
appropriate for the prob-Cham work;
3. The choice of design parameters of
parts;
4. Calculation of the operating
parameters of the installation;
5. Analysis of the results, the
development of the technology of pumping.
Object
and subject of development
The
object of development can be regarded as guide-ravlichesky packer
to be used with the installation of a submersible pump in it. The
stated problem will be solved by developing a new device, based on
already existing and used in the oil industry.
is to develop compact and reliable packers to divide the well,
and for
pumping from wells at a considerable depth with a submersible hydraulic
pump.
In
conducting pumping liquid submersible pumps (gidroporshnevymi or
ejector) used different schemes of their installation in the borehole,
depending on the desired operating conditions [1].
The analysis of different schemes showed that the most frequently used
schemes with lifting pipes at the lower end of which is established a
special saddle, in which tightly set shank submersible pump. Sometimes
it can use an scheme in which as the lifting pipe is used to
Lonna-casing, which is well secured [2]. For
the separation reservoir from
the rest of the casing, which is used as a lift-emnoy apply mechanical
packer, which open when pushed to tail-vet
Using
such schemes allows to lower steel well, since the well to a greater
depth is not drop down one or even several co-lonn pipes, and this
ultimately results in reducing the cost of pumping [3].
Scheme without the metal of the riser pipe is not advisable to use only
liquid extraction of natural resources (water or oil) from a depth of
1,000 meters or more, and with hydrogeological studies and in wells,
such as the exploration of coal-GOVERNMENTAL deposits.
However, the use of such a scheme is difficult because of the
lack of reliable packet-ers, which will be triggered without stop liner
in bottom hole.
The
analysis used structural packers showed that the oil-term industry uses
a wide variety of packers: mechanical, hydraulic and hydro, which
devepoled in various organizations-tions for different operating
conditions. Of
particular interest are the construction of the packers, who disclosed
the pressure force of the liquid. They are more reliably cover the
wellbore.
However, most
designs of such packers are designed for cementing operations in a
borehole or fracturing producing formations, and are unable, without
changing the design used in conducting pumping liquid from the wells
with submersible pumps, since the packer must be disclosed to the same
force-liquid curve, which is used to drive gidroporshnevyh pumps. It is
therefore necessary to divide an operation to uncover the packer and
the hydraulic retention of its cage in the open position when working
gidroporshnevogo pump. Besides channels packer should be free, without
a large hydraulic resistance transmittance Cach extracted and driving
force fluid.
Description
of advanced design packer
Taking into
account the identified strengths and weaknesses of existing designs
packers developed an improved scheme of the packer shown in Figure 2.
Pic. 1—scheme
of the packer
Hydraulic packer is lowered into the hole on the pillar of power
tubes.
When
you place your pump runs into the upper adapter (1) body packer (Figure
not shown) and at the same spool (13) covers the outlet force fluid
into the hole, and slide the spring packer (12), overcoming the
pressure of the liquid column, holds spool in the upper position and
opens the channels for the passage of the power fluid in the packer.
After lowering the
packer and a pump to the required depth ground drive pump on power
tubes served a certain amount of fluid power, co-Thoraya, passing
through the hydraulic pump does not include it in the job and enters
the cavity packer and decompresses the rubber element (15), which
tightly pressed against the walls of the borehole.
Then
the hydraulic pump (6) falls to the installation of its shank in a
special saddle (7). The emphasis (3) moves the spool packer down,
closes the hole for the passage of the power fluid in the packer and
keeps the packer in the open position.
After expansion
packer ground driven pump to force the pipes are given an increased
amount of fluid power required for inclusion in the work-that of
hydraulic submersible pump and begins the process of evacuation.
After
the end of pumping water pump is lifted, the emphasis Free gold-nick,
which is under the influence of the spring moves into the top position.
The fluid pressure on the rubber packer element is reduced and it is
returned to its original position.
In carrying out
scientific work chosen method of calculating the working parameters of
the improved packer. Selected design and calculated work-being
parameters packer. Completed assembly drawing developed by the packer. Figure 3
shows an animated diagram of a packer in the borehole.
Are shown cycles of the descent into the well packer, the disclosure
under the cuff of fluid power, lifting fluid from a well, transporting
the packer to the
surface.
Pic. 2—an
animated diagram of the packer ( 81 kb, gif, 7 repetition, 4 frame ).
Technology
application and terms of use
Designed hydraulic packer universal and therefore we can use both
when used as a lifting of the column of metal pipes, and in case of use
as a lifting pipe stem inde-well casing.
Thus, a
submersible pump can be used without the descent into the hole of the
riser pipe (Figure 4 a), with the lifting pipes, but with the exclusion
of productive the horizon from the overlying water-oil-bearing horizons
(Figure 4 b), the isolation of my-recoverable from the productive
horizon fluid from the power fluid designed for hydraulic drive
submersible pump (Figure 4).
Pic. 3—methods
for installing a packer in the well
When using any of the proposed scheme packer is lowered into the
well on a column of power tubes (drill pipe diameter 42 or 50mm) at the
same time in gruzhnym gidroporshnevym pump.
The design of the
packer to divide an operation to uncover the packer and the hydraulic
retention of its cage in the open position when working hydraulic
piston pump [4].
For assembly and
disassembly of the packer does not require special tools and
with-sposobleniya. Assembly and disassembly by using a standard set of
repair and plumbing tools.
When repairs,
maintenance, transportation and storage is no a Special requirements
and restrictions.
Before operating the unit holds disassembly mechanism with a
follow-grease all threaded connections to prevent their further
conclude, smoothing, and lubrication of spools [5].
It is also
necessary to monitor the wear of sealing elements and the ball valve
and, if necessary, to fulfill their replacement.
After performing all the operations
enumerated packer is going to bringing it into the transport position.
The
order of operation is as follows: the device is placed on the receiving
bridge, then at the top of the packer, an adapter, which sliced the
castle-hand thread W-50, screwed coupler lock drilling and packer up
elevator and lowered into the borehole.
After
lowering the packer to the desired depth is fed power fluid and na-ker
disclosed, clinging to the walls of the well or riser pipe (in
dependence eh scheme used) [6]. Then
the power tubes are omitted, shifts
the spool hydraulic pump liner, which overlaps the opening in the
packer. Ground drive pump on the power tubes is fed hydraulic fluid and
a packer. Included hydro-electric motor and starts the process of
evacuation. The emphasis holds spool in the lower position therein.
When operating the hydraulic pump
fluid from the well is sucked through the check valve and channels in
the packer.
After
the end of pumping water pump is lifted, the emphasis Free gold-nick,
which is under the influence of the spring moves into the top position.
Pressure of the fluid on the rubber packer element is reduced and it is
set in of the initial position.
After the
operation the device should be washed from the particles of the
solution, OC-tavshegosya it after use, and then dried and stored in a
dry place, protected from rain (snow) place. To service the device only two men drill
team, machine-grained and assistant driver's rig.
When operating the
proposed device should be guided by generally-accepted rules of safety
work in production. No spe-cial rules and procedures of safe operation
by the mechanism is not required.
When
the mechanism is excluded the possibility of negative impact the field
device to the environment, nor does it require any special measures for
the protec-tion.
In assembling the
seal all gaps between the cuffs should be eliminated. In this case, the
gap nedolzhen be more than 15 mm. This gap is adjusted by adjusting the
cuffs.
After graduating frills packer to
check tightness of thread-O compounds by means of a hydraulic test
pressure of 7 MPa
Operation of the packer must be made
in compliance with current geo-logorazvedke safety rules. Before starting work staff
should be well studied construc-struction packer and the manual. During descent, inserting and removing a
packer of hoisting equipment at the well shall be equipped with an
indicator weight.
Transportation, loading and unloading of the packer must be in
accordance with the rules of transportation, loading and unloading long
items. During the ferry-ki packer must be fixed so as not moving
[7].
When
you place the packer is strictly prohibited to exceed the speed of 0,5
m / s (1 tube for 15-20s), as in the case of sudden cardiac packer,
block and tackle arrangement abruptly unloading-zhaetsya and poses a
danger to workers [8].
When breaks in tripping
the annulus and pipe should be closed to avoid getting foreign objects.
Into the hole.
Pumping units used in the packer must be set-Ny at least 10 m
from the wellhead and delivered so that the cabin had not been
addressed to the wellhead.
No
repair work at the well under the pressure of steam. Before con-deniem
repairs on wellhead supply lines must be hermetically sealed, partially
closed and pressure is reduced (to zero).
Threaded connections packer pipe
string, wellhead should be lubricated with heat-resistant sealant
lubricant (graphite-based).
Presently master's degree work is in the stage of
development. After December, 2011 the complete text of work can be got
for an author or scientific supervisor.
1. Казак А. С. Погружные поршневые бесштанговые насосы с гидроприводом.
– Л.: Гостоптехиздат, 1961.
2. Неудачин Г. И., Пилипец В. И., Фоменко В. С., Зыбинский П. В.
Погружной
бесштанговый насос для откачки жидкости из скважин. – Москва:
«Разведка и охрана недр», 1976, № 9.
3. Неудачин Г. И., Пилипец В. И. Погружной бесштанговый насос для
подъема
воды из буровых скважин. «Гидротехника и мелиорация», № 7,
1981.
4. Пилипец В. И. Насосы для подъема жидкости. Учебное пособие с грифом
Минвуза. - Донецк: 2000
– 244 с.
5. Авторские свидетельства СССР № 307177, кл. Е 21 В 33/12, 1971.
6. Богданов Н. А. Погружные центробежные насосы для добычи нефти. - М.
Недра, 1968г.
7. Неудачин Г. И., Пилипец. В. И. Разработка гидрокачалки для привода
штанговых насосов – М.: ЦНИИЭИУголь, №12, 1976.
8. Неудачин. Г. И.., Пилипец. В. И Погружной пневматический насос. -
М.: ЦНИИЭИУголь, №27, 1976
