Abstract
of Master's Qualifying
Work
"Development of the hyrdaulic hammer for freeze-in liquidation that makes the pressure drawdown to the blind box"
Introduction
One of the most widespread, varied, difficult and labour
intensive classes of breakage in the exploration drilling are
freeze-ins. On their stake is to 60-80% jury time. In addition,
precipices, developments and dropping of tool, are often
accompanied freeze-ins or preceded them. [6]
Actuality
During work of existent shock devices powerful single shots or
jarring action are created only, that is why they are little
suitable for elimination of such freeze-ins. In this connection
development and installation of new effective methods and
engineerings facilities of warning and elimination of freeze-ins
is one of issues of the day of boring of geological survey and
engineerings access boreholes.
Objectives and goals
The goal of work is development of construction of hydraulic
hammer for elimination of freeze-ins of boring head, with the
generation of pressure drawdown on a blind box.
Idea of work: Buildup of efficiency of jury works on elimination
of freeze-ins which arise up under the function of pressure
which is conditioned the difference of pressure and bedded head
decrease, as a result the feature of drill stem of certain
length cuddles to the wall of access borehole, due to the
decrease of pressure head in the belt of freeze-in with
simultaneous imposition of impacts.
For achievement of the put goal the followings tasks decide
in-process:
1. Development of principle chart of hydraulic hammer for
elimination of freeze-ins with the generation of pressure
drawdown on a blind box.
2. Leadthrough of calculations of hydraulic hammer and his
components; determination of rational characteristics of device.
3. Implementation of experimental-design works.
Object of investigations: engineerings facilities for
elimination of freeze-ins.
Article of investigations: constructions of hydraulic hammers
for elimination of freeze-ins of boring head.
Methods of investigations: The put tasks decided by the
leadthrough of theoretical investigations, leadthrough of
calculations by the program of calculations of basal
characteristics of hydraulic hammer, implementation of
experimental-design works.
Work Approbation
The separate fragments of work were given a report on the
followings conferences:
The VIII
all-Ukrainian student conference “Drilling”, 25 of Apil, 2008,
Donetsk.
Recipient of an award a deed for the best lecture on a theme
«Development of hydraulic hammer for elimination of freeze-ins
of boring head».
The IX
all-Ukrainian scientific and technical student conference
“Drilling”, Donetsk, 23 of April, 2009.
Recipient of an award a diploma for active voice and the best
report
on a theme the «Hydraulic shock device for elimination of
difficult freeze-ins in access boreholes».
In the Ivano-Francovsk national engineering university of oil
and gas the all-Ukrainian competition of the student advanced
studies was conducted in industry «Oil and gas industry». A
conference drove from March, 24 for March, 27, 2009. On data a
competition I was the recipient of an award a diploma, for busy
the III habitat in the all-Ukrainian competition of the student
advanced studies on industry «Oil and gas industry» in a
nomination «Installation of oil and gas industry».
Contents
The on principle new chart of hydraulic shock device is
in-process offered, for elimination of difficult freeze-ins in
an access borehole, conditioned the difference of pressure and
bedded head.
Attachment consists of hydraulic hammer of double-action with a
pumping block and packer with the blown up barrel, executed
limitedly mobile in relation to a hydraulic hammer. The chart of
attachment is presented on the fig. 1a.
A hydraulic hammer consists of overhead reaming pilot adapter 1,
bodies 2, into which a valvular box is set 3 with a core barrel
4, in which a piston is placed 5, united with smart 6. A bullet
6 set between overhead and lower anvils 7 and 8, connected with
a body 2. In the complement of pumping block boss enters 9,
united with smart 6, and also suction and blower pump flap 10
and 11. In the foot of anvil 8 there is a reaming pilot adapter
12 for a bond with a blind box. The valvular bank of hydraulic
hammer consists of inlet 13 and exhaust 14 flaps, connected by a
pushrod 15.
In the top end of hydraulic hammer, for a bond with pipe drills,
hollow shtok is set 16 with an aperture 17, and a hydraulic
hammer is supplied a case 18.
Packer consists of the blown up barrel 19 and bodies 20, set
mobile in relation to boss 16. Cavity of the blown up barrel 19
related to the cavity of boss an aperture 17 and by a conduit
21, and cavity of case 18 hydraulic hammer connected with an
access borehole higher than packer ductings 22 and 23. Body 20
supplied a branch 24, set in a case 18, in the foot of which an
arrester is executed 25. In an initial condition branch 24 fixed
in relation to a case 18 cut away by peg 26.
Disposition of device in an access borehole and chart of his
work is rotined on the fig. 1b and 1c. The conductor of motion
fluid in attachment during his work is indicated hands.
а
b
c
Figure 1 – The hydraulic shock device for elimination of
difficult freeze-ins in access boreholes. a – Chart of
attachment, b – disposition of device, is in an access borehole,
c – chart of work of device
Attachment joins in with a caught-on bullet. Driving fluid is
discharged to the hydraulic hammer on the column of pipe drills.
Packer works and dissociates the belt of freeze-in from other
access borehole. Pressure increases in collection, a hydraulic
hammer is started in work and lays about, transmissible on a
caught-on bullet.
Work of hydraulic hammer, being the generator of shock
impetuses, is taken to the following. In an initial condition 6
a bullet under the function of own weight is in an extreme lower
condition. Induction-valve 13 blocked, and exhaust 14 opened.
Circulating fluid, discharged from a boring pump on an eel to
the reaming pilot adapter 1, acts under a piston 5, causing by
force the pressure elevation piston-bullet.
Fluid, being above a piston 5, is ousted through the bias axial
ductings of valvular box in the cavity of case of hydraulic
hammer. In the period of motion a valvular bank a bullet upwards
remains in an initial condition due to pressure of fluid on an
induction-valve 13. As far as an ascent a piston-bullet spring,
abutting against the butt of butterfly 14, compresses.
A piston meets with a butterfly 14 and buffets on him. Due to
blow and force of the compressed spring energy butterfly 14
closes the bias axial ductings of valvular box 3, and
induction-valve 13, moving upwards, will open the central
conduit of valvular box, providing access of fluid and in the
overhead cavity of core barrel 4.
Because the area of piston more than his area from the side of
lower cavity from the side of overhead cavity of core barrel, a
bullet 6 will swoop down. Thus a valvular bank will save the
overhead condition due to pressure of water on a butterfly 14.
In moment when a piston a bite by the butt of flap 14,
transposition of flaps will happen in an initial condition. The
cycle of work of hydraulic hammer will repeat oneself further.
In periods of transposition of flaps bullet, due to the
accumulated energy, continues up-stroke or downward to hitting
with anvils 7 and 8.
At motion 6 a bullet upwards there is intake of fluid from an
access borehole through the suction flap of pumping block 10 in
space under the boss, and at motion of boss downward fluid will
be blown out through a forcing flap 11 in a belt above packer.
Execution of construction allows to move a hydraulic hammer on
pipe drills in relation to packer, that provides the capability
of moving of caught-on bullet in the case of elimination of
freeze-in.
The designed device, providing the decrease of pressure in the
belt of freeze-in in the process of work, is let in on the
ground:
1. During work inflictings blows are provided downward and
upwards;
2. The permanent of long duration decrease of pressure in the
belt of freeze-in is provided.
By the program of calculations of basal characteristics of
hydraulic hammer, the rational characteristics of device were
inspected. The method of engineering calculation of
characteristics of hydraulic hammers of double-action is based
on the generals of theory of work of hydraulic hammer.
After the leadthrough of calculations, the rational
characteristics of hydraulic hammer were inspected:
Motion bullet are 25 mm;
A working stroke is 22 mm;
Free motion is 3 mm
The interface of the program of calculation of characteristics
is presented on a fig. 2.
Figure 2
– Interface of the program of calculation of power
characteristics of hydraulic shock device for elimination of
difficult freeze-ins in access boreholes
For the calculation of packer for a base there was the
inspected method of Zhukov, in which the specified equation for
the calculation of pressure, necessary for swell of barrel to
interference with the walls of access borehole. The calculation
of packer was conducted for shallow geological survey drilling
conditions, when a pressure decrease on packer is 5 MPa.
Consequences
In this work the chart of hydraulic hammer is offered for
elimination of freeze-ins of boring head.
The rational characteristics of device were inspected.
The calculations of characteristics of packer are conducted.
It is assumed that installation of the offered attachment will
allow to provide more high effectiveness in elimination of
freeze-ins, and also will shorten time on their elimination.
Literature
1. Винниченко В.М. Предупреждение и ликвидация аварий и
осложнений при бурении разведочных скважин:
учебное пособие для
учащихся профтехобразования и рабочих на производстве / В.М.
Винниченко, А.Е. Гончаров, Н.Н. Максименко. – М.:
Недра, 1991.
– 170 с.
2. Гончаров А.Е.
Пособие бурильщику и мастеру по предупреждению и ликвидации
аварий и осложнений при разведочном бурении/
А.Е. Гончаров, В.М.
Винниченко. – М.: Недра, 1987.
– 128 с.
3. Дудля Н.А. Предупреждение и ликвидация аварий при бурении:
учебное пособие.
–
[2-е изд.]
/ Н.А.
Дудля, С. Стричёк, И.Р.
Островский. –
Донецк: Лира ЛТД, 2007. – 328 с.
4. Кемп Г. Ловильные работы в
нефтяных скважинах. Техника и технология: переработанное с
английского / Г. Кемп, переработал: Г.П. Шульженко. – М.: Недра, 1990. –
96 с.
5. Кичигин А.В.
Ликвидация прихватов бурильной колонны с использованием ударных
механизмов /
А.В. Кичигин, В.И.
Назаров. – М.: ВНИИОЭНГ, 1982. – 60 с.
6. Коломоец А.В. Предупреждение и
ликвидация прихватов в разведочном бурении / А.В.
Коломоец. – М.: Недра, 1985.
– 220 с.
7. Подгорнов М.И. Ловильный инструмент:
учебное пособие для рабочих / М.И.
Подгорнов, И.П. Пустовойтенко. – М.:
Недра, 1984. – 148 с.
8. Пустовойтенко И.П.
Предупреждение и ликвидация аварий в бурении. –
[3-е издание,
переработанное и дополненное]
/ И.П. Пустовойтенко. – М.: Недра, 1988. – 279 с.
9. Самотой А.К. Предупреждение и
ликвидация прихватов труб при бурении скважин / А.К.
Самотой. – М.: Недра,
1979. – 182 с.
10. Самотой А.К. Прихваты колонн
при бурении скважин
/ А.К. Самотой. – М.: Недра, 1984.
– 205 с.
11.
Парфенюк С.Н. Разработка гидроударника дифференциального
действия с усовершенствованной клапанной группой [Электронный
ресурс]
/ - режим доступа к статье
http://www.uran.donetsk.ua/~masters/2003/ggeo/parfenyuk/library/gidroud.htm
Presently master's degree work is in the
stage of development. After December, 2009 the complete text
of work can be got for an author or scientific director.
Abstract