speaking about packer technique in oil and gas well completion

1. Packers
BY Engineer :
Mohammed Bedair Yossof
faculty of petroleum and mining
engineering
suez canal university
E-mail :
bakar_zezo99@yahoo.com

2. Outlines
1-What’s packer and its mechanism ?
2-Why we use packers?
3-Types of packers?
4-Removal of the packer?
5-Safety joints in the packers

3. Packer
Is the heart of well
completions
Right choose help you
to ensure the integrity
and longevity and
over all success of
any completion

4. Why we use packer ?
1-Protection of the casing from pressure and
corrosive fluids
2-Isolation of multiple production intervals
3-Elimination of inefficient heading and
surging
4-Some artificial lift installations
5-To hold kill fluids or treating fluids in
casing annulus

5. Packer Mechanism
1-Drive a cone behind a
tapered slip to force
the slip into the
casing wall and
prevent packer from
movement

6. 2-Compress a packing elements to
effect a seal

7. Sealing system
Ability to seal and hold differential pressure
Is rubber of stress greater than differential
pressure
May be one or more pecies

8. In the three pieces

9. Sealing rubber Types
Bonded
Chevron

10. Sealing can be rubber only or with
metallic back-up rings at high temp and
pressure
1-bonded seal like ((viton—aflas))
2- chevron seal like ((viton--- aflas—ryton—
teflon))
3-nitrile >> below 250 F no H2S
4-viton >>300 F and H2S
5-kelrez ,teflon, ryton with metalic back up
rings at >> 300 F and 10,000 psi dp
6-At 450 F Teflon resist H2S

11. PACKER TYPES
BY FUNCTION
BY RUNNING
LIFE TIME

12. By Function
1- Cement packer
2- Gravel back packer
3- Packer fluid
4- Inflatable packer
5- Open Hole Packer
6- External Casing Packer
7-Straddle packer
8-model D packer

13. cement packer

14. Gravel back packer
Gravel packing:
A method of well completion in which a slotted or
perforated liner, often wire-wrapped, is placed in
the well and surrounded by gravel.
If open hole, the well is sometimes enlarged by
under reaming at the point where the gravel is
packed.
The mass of gravel excludes sand from the well
bore but allows continued production.

16. Packer fluid:
A liquid, usually salt water or oil, but
sometimes mud, used in a well when a
packer is between the tubing and the
casing.
Packer fluid must be heavy enough to shut
off the pressure of the formation being
produced, must not stiffen or settle out of
suspension over long periods of time, and
must be no corrosive.
Inflatable packer:
A type of packer used for open-hole work,
with inflatable packing elements

17. Open Hole Packer
an inflatable or other packer that can seal in
an open hole environment.
External Casing Packer
a rubber bladder over a section of casing
that is inflated, usually with cement, to give
an annular seal in open hole sections.
Frequently used with liners and set at
intervals along the open hole.

20. Straddle Packer
a twin sealing element device with a
perforated nipple in between. It is used to
selectively inject fluids into a part of the
zone.
Model D Packer
a trademarked name for a very common
packer

22. By Running
1-weight set packer
2-Tension set packer
3-Mechanical set packer
4-Hydraulic set packer
5-Electric wire line set packer

23. Weight set packer
1- J-slot opens and permit tubing vertical motion
2-cone then moves behind the slips and anchor it
in the casing
3-tubing weight is then set to expand the packer
sealing element
APPLICATIONS:
1-Production wells
2-Well treating operations

25. Tension set packer
Like weight set except we do tension pull on
the tubing Ruther than leave weight
APPLICATIONS :
Shallow wells
Water injection wells and stimulation work •

27. Mechanical set packer
Tubing rotation play an important role
To ways
1-simultaneosly set the seal and the slips in
continuous motion of the screw threads that
drive the cone behind the slips and compress
the seals
2-realease the inner mandrel and allow the tubing
weight to dive the cone behind the slips and
compress the seals
AFTER running we do right tube rotation and
tension to reduce the effect of tubing buckling

29. Hydraulic set packer
Hydraulic set packer utilize fluid pressure
acting on a piston-cylinder arrangement to
drive the cone behind the slips and
compress the seals
The packer remains set by a pressure
actuated mechanical lock

31. Electric wire line
1-a cylindrical body attached at it’s top to a cable
and at it’s bottom to the square thread of the
packer inner mandrel
2- when the packer reached the required depth
.the explosive charge placed in the upper
chamber of the tool is fired electrically the force
the expanding gases is transmitted to the
hydraulic jack via a floating piston which expels
the oil contained in the upper cylinder toward the
lower cylinder throw a flow beam

33. Life Time
1-Permanent packers
2-Retrievable packers

34. Permanent -type
The packer is set within the casing and the
setting mechanism (tubing/wire line) can
be released from the packer. Except for
the case of a permanent bridge plug the
tubing can be run and resealed in the
packer.
The packer may be set mechanically (by
tubing), hydraulically or electrically (by
wire line)

35. Selective types of perm. packer
QL permanent packer
QLHB
•

36. Retrievable packer
Is the type in which the tubing and the
packer are moving as one body
Like :
Mechanical set
Weight set
Tension set
Hydraulic set

37. Selective types
QUANTUM MAX •
QUANTUM •

38. Packer removal
((fishing operations))
Permanent packer
Easy to fishing because it’s parts are
drillable
Retrievable packer
Hard because it’s parts are non drillable

39. Packer Removal Reasons
1-Leaks
2-Access to lower zones with full bore
equipment
3-Recompletion with lift systems, etc.

40. First permanent packers
1-Sand line drill –drill collars with a chisel
bit, run on braded line –chop the packer
up.
2-Most common –mill over outer slips and
packing element, retrieve the packer body
up.

41. Sand Line Drill
1-Essentially a battering ram with a sharp tip.
2-Series of drill collars with a rope rocket and a chisel bit.
3-Picked up 30 to 40 feet above the packer or plug and
dropped.
4-Very effective removal.
-Used in shallow wells where cannot apply weight on a
conventional mill
-May damage the casing
-May not be able to control pressure below a packer or
plug when it breaks free.

42. Mill Over the Slips
1-A mill shoe is run with a BHADrill Collars –weight
2-Bumper Sub –jar
3-Junk Basket –catches small debris
4-Mill Shoe –cuts slips and element
5-Extension –reaches through bore of packer
6-Packer Spear –grips packer ID after slips cut

45. Safety joints
1-Long stroke safety shear sub
2-Tubing tension safety joint
3-Rotation release safety joint

46. Why we use safety joints ?
-In the event of completion assembly must
be retrieved and the packer or seal
assembly does not release
-By parting at shear pins ,the completion
assembly above the shear joint can be
retrieved and a working string with drilling
jars can be used to release or retrieve the
packer or seal assembly

47. Long stroke safety shear sub
-Its consists of an overshot connected to a
slick joint with shear pins
-The shear sub is rotationally locked
APPLICATION:
-used in sand control ,ESP completion and
production

49. Tubing tension safety joint
The tubing tension safety joint permits
torque-through capability and requires
straight upward pull to release.
APPLICATION:
Single and dual completion

51. Rotation release safety joint
The tension safety joint provide a tensile
strength equal to the tubing and required a
right hand rotation to release
APPLICATION :
Single and dual completion

53. CONCLUSION
1-Packer is the heart of any completion
process
2-Packer mechanism (( driving a cone and
sealing))
3-Why we use packer ?
4-Types of packers: -by function
-by running
-by life time
5-Removal of packers
6-Safety joints

54. References
www.slb.com •

55. THANKS FOR ATTENTION
ANY QUESTIONS ?