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Product

Part Number: Product Description:Tech Sheet

Number:080-2047-240MFH Hydrostatic Set Retrievable Packer,7" 20-26# 080-2047-240

Features/Description Sets securely in any hardness casing, including premium grades. Operationally simple. Hydraulically activated, hydrostatic set-low pressure, rig pump capable activation. Field adjustable shear release. Built-in unloader and bypass-to aid in releasing and retrieving. Pack-off is mechanically locked and constantly reinforced by hydrostatic pressure. Triple seal multi-durometer elements-insure pressure integrity over a wide range of

temperatures and conforms easily to casing irregularities. No Mandrel movement during setting allows stacked packer applications.

The Model MFH Hydrostatic Packers is a retrievable, double-grip packer set by either the

Hydrostatic head of the well, tubing pressure, or both and will hold pressure from above or

below. It can be run as a single packer or as a lower packer in multiple packer hookups using

dual or triple string packers. It also can be run as an upper packer in selective single string. For

applications to: Production, injection and zonal isolation; Single string selective completions or

dual string completions with multiple packers; Deviated wells or other applications where no

rotation for installation or removal is desired; Applications where displacing and setting is

desirable after the well is flanged up is desirable; Applications where prohibit mechanically-set

packers; Test tubing string before packer setting or to independently set and test individual

packers in multiple packer completions.

Operating Instructions

OPERATION INSTRUCTIONS:

The model "MFH" Packer is actuated by pressuring the tubing to obtain a differential at the

packer. To accomplish this a means of temporarily plugging the tubing below the packer must

be provided. Such as Pump Out Plug at some point below the packer.If more than one "MFH"Packer is to be run,one of the top temporary tubing plugging devices must be run below the

lowermost packer. When the tubing is pressured in this case, all of the Hydrostatic Packers will

be set simultaneously. (If it is desirable to individually set and test each packer,a

recommended practice is included below.)

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Running:1. For applications where the hydrostatic pressure is 1,500 psi or aboveRun packer to setting depth, flange up the well and displace tubing. Place a ball in the tubing

string and pump down to the seat in the Pump Out Plug below the Model "MFH" Packer.

Increase the tubing pressure to approximately 1,000 psi over the annulus pressure at the

packer. (At hydrostatic pressure over 7,500 psi the actuating pressure will increase with

increasing hydrostatic pressure due to load on Segment Retainer.) This will shear the Shear

Screws in the Segment Retainer, allowing it to move up, and release the Ring Segments and

unlock the Connector Mandrel from the Mandrel. The hydrostatic pressure of the well fluid then

forces the Connector Mandrel down into the Atmospheric Chamber. This action moves the

Receptacle down toward the Slip Ring, setting the Slips and packing off the tool. The

downward movement of the Receptacle, Packing Element Mandrel, and Connector Mandrel,

etc., is held by the Body Lock Ring engaging the Mandrel. If after the packer is set, the tubingcontracts, the Mandrel can move up until the Shear Ring Retainer contacts the Shock

Absorber at bottom of the Setting sleeve. This movement will be retained in the Body Lock

Ring. If the Tubing elongates, the downward force of the Mandrel is transmitted through the

Body Lock Ring, Packing Element Mandrel, Receptacle, Packing Elements, and Cone, adding

to the setting force.After the Packing Elements are sealed off, any differential pressure from below the tool will

actuate the hydraulic hold-down Pistons and engage them in the casting. The tubing pressure

differential is then increased across the Hydro-Trip Pressure Sub Ball Seat to pump the Ball

through the finger-type Ball Seat and allow it to gravitate to bottom. The Ball Seat fingers will

expand into the recess provided and leave the tubing full opening.2. For applications where the hydrostatic pressure is less than 1,500 psi

The Model "MFH" Hydrostatic Packer is designed to allow the packer to be set hydraulically at

shallow depths where the hydrostatic pressure is not sufficient to effectively set the packer. For

this application, the packer is dressed with an additional number of Shear Screw to increase

the actuating pressure to 2,000 psi. The actuating pressure is increased from 1,000 psi to

2,000 psi under this condition in order to provide additional stretch in the tubing at the time the

packer is set so that there is a great likelihood that the rebound will shoulder the Mandrel

against the Shear Ring when the Hydro-Trip Pressure Sub is sheared out. In order to allow

adequate safety factor, the Hydro-Trip Pressure Sub must be dressed to require 3,500 psi

differential to blow the Ball through the Sub.Note:In order for the packer to be set, the Hydro-Trip Pressure Sub must allow the tubing pressure

to be increased over the annulus pressure to a level sufficient to release the Ring Segments. It

is important to note that in wells that take fluid under hydrostatic pressure alone, it is possibleto obtain a differential across the Ball without pressuring the tubing. If the tubing, below the

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Ball, is isolated from the annulus (as with a permanent packer below the Hydrostatic Packer),

the Ball could shear the Hydro-Trip Sub without setting the packer. Under these conditions,

provisions should be made for running a seating nipple and landing a plug on wireline.Releasing Procedure:The standard Model "MFH" Packer is equipped with a 30,000 lb. Shear Ring for a straight

upstrain release. Other values of Shear Rings available are shown in the table below.Shear Ring Availability Chart

Shear Ring (lbs.)Packer Size

20,000 30,000 40,000 50,00043 x x x45 x x x x46 x x x x47 x x x x48 x x x x49 x x x x51 x x x x

Determination of Shear Release Values (Prefer to Mandrel and Tubing area table)As the Shear Ring limits the upward travel of the Mandrel when the packer is set, thereby

preventing the packer from unsetting, it is imperative that due consideration is given to the

selection of a shear-out value. Four general sets of conditions are described below.

(Remember that the following calculations include only piston effect due to pressure. Other

factors, specifically ballooning and temperature effects, can contribute significantly to the force

on the Shear Ring. If the packer is to be used for treating of stimulation, these factors must be

considered.)Am=Area of Mandrel ODAi=Area of Tubing IDAo=Area of Tubing OD*Pt=Change in Tubing Pressure (psi)*Pa=Change in Casing Pressure (psi)

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1. Lower packer, annulus pressure constantPressure increase in the tubing results in a force up on the shear ring equal to pressure

change multiplied by the cross-sectional area (Am-AI). A pressure decrease in the tubing

results in a force up on the tubing equal to the pressure change multiplied by the

cross-sectional area (Am-AI).2. Lower packer, tubing pressure constantA pressure increase in the annulus results in a force down on the receptacle equal to the

pressure change multiplied by the cross-sectional area (Am-AO). A pressure decrease in the

annulus results in a force down on the tubing equal to the pressure change multiplied by the

Cross-sectional area (Am-AO)If there is a change in both the annulus and tubing pressure, the resultant force may becalculated by subtraction of forces as calculated in step 2, from forces as calculated in step 1.

Net resultant=*Pt (Am-AI)-*Pa (Am-AO)A positive result to the above equation indicates a net resultant force up on the shear ring , and

a negative result indicates a net resultant force down on the receptacle.Note: Values of *P should be substituted in the equations with proper signs (+ for increase, -

for decrease).3. Single packer installation-tubing pluggedWith the tubing plugged, and assuming constant annulus pressure above the packer, a

pressure differential across the plug in favor of tubing will act down with a force equal to the

pressure differential multiplied by the area of the tubing ID. A pressure differential in favor of

the annulus below the packer and plug will act up with a force equal to the differential pressure

multiplied by the area of the Packer Mandrel OD.Pressure changes in the annulus above the packer will result in a force acting down equal to

the pressure change multiplied by the area of the Mandrel OD minus the area of the tubing

OD.4. Two or more packer installation -tubing pluggedTwo or more packer installation, packers and tubing same size, Production, or injection

between packers: If the tubing is plugged between packers with the tubing and annulus

equalized between the packers, a pressure differential across the plug in favor of the tubing

above the plug results in a force down equal to the differential pressure multiplied by the area

of the tubing ID. A pressure differential in favor of the annulus below the plug results in a force

up equal to the differential pressure multiplied by the area of the Packer Mandrel OD.

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Since it would be almost impossible to foresee and calculate all of these factors, a 30,000 lb.

shear value will usually suffice unless it is known in advance that any of the above forces will

be unusually large. For instance, if the installation is such that the zone above the lower packer

in a selective completion can be drawn down considerably, the upward force described in Step

4 should be calculated to verify that the 30,000 lb. shear force is sufficient: likewise, if the well

is to be treated from the surface at high rates, thereby cooling the tubing considerably,

temperature effects could become significant and should be calculated or estimated.

Mandrel & Tubing Area

Packer Size Tubing Size ( Am-AI ) (sq. in.) ( Am-AO ) (sq. in.) Am (sq. in.)43 2-3/8 1.15 0.2* 4.245 2-3/8 1.8 0.5 4.9

2-3/8 4.0 2.7 7.146 & 47

2-7/8 2.4 0.6 7.12-3/8 2.8 1.5 5.92-7/8 3.6 1.8 8.349 & 513-1/2 3.4 1.0 10.5

* On this packer the annulus hydrostatic exerts a force up on the Mandrel equal to 0.2 sq. in.

resulting in a load on the shear ring. This effect is small, but should be taken into account when

selecting a shear ring for the packer.

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AREAS, PRESSURE & SHEAR SCREWSShear Screws

Setting area (sq. in.) Number toactuate packer

at 2,000 psi*

Tubing pressure

(psi) required to

shear eachshear screwPackerSize

HydrostaticHydraulic

Min. tubing

pressure**

to setpacker &

pack-off w/

zero

Hydrostatic

Area

(sq. in.)

availablefor

shearing

shear

screws

Size Numberin std.assy.

BrassAnnealed

steel BrassAnnealedsteel43 3.2 1.8 4,050 psi 3.0 #10-32 6 5 350 41045 4.5 2.7 2,750 psi 4.3 5/16-18 4 3 550 75046 6.2 3.8 2,560 psi 6.6 5/16-18 5 4 360 49047 6.2 3.8 2,560 psi 6.6 5/16-18 6 4 360 49049 8.6 4.1 4,000 psi 7.9 3/8-16 5 3 450 61051 8.6 4.1 4,000 psi 7.9 3/8-16

2 Brass

5 3 450 610* When hydrostatic pressure is less than 1,500 psi.**Minimum pressure for setting can be reduced if some but not sufficient hydrostatic pressure

is available. Example: The minimum force required for setting Size 45 Packer is

F=(2,750 psi) x (2.7 in.^2)=7,425 lb. With a Hydrostatic head of 600 psiF'=force available from Hydrostatic=(600 psi) x (4.5 in.^2)=2,700 lb. Therefore force required

from Hydraulic setting is

F''=F-F'=7,425-2,700=4725 lb. Then minimum tubing pressure required for setting when

Hydrostatic Head is 600 psi isP=F''/Hydraulic Setting Area=4,725 lb./2.7 sq. in.=1,750 psiPressure may also be applied to the annulus in low hydrostatic applications to reduce the

minimum tubing pressure required for proper pack-off.

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Specifications

Casing Setting Range Absolute Travel Limits

SlipsOD

WT

(T&C)Min. ID Max. ID

Min. OD. Max. ODPacker

max. O.D

Packer

Bore

Thread

Box Up

Pin Down

7" 20-26 6.276 6.456 5.858 6.456 6.078 2.416 2 7/8 -8 EUE

Assembly Instructions

NOTES: Lubricate O-ring and O-ring grooves and all mating threads before assembly. Apply

the grease to the Slip Ring slots, Cone slots and Slip areas that contact these two parts. Pack

the space between Slip Ring and Segment Retainer with the grease. This will help prevent

buildup of the well fluids in this critical area.

1. Install all O-ring.

2. Assemble pistons (item 8), piston springs (item 6), restraining pins (item 7), and piston

retainers (item 52) in receptacle (item 4).

3. Assemble slips (item 21) in cone (item 18) and slip ring (item 26).

Required To Pack-Off Packing Elements SystemsElement Duro

Classification Temp. Range (DegF)

End Middle EndStandard Tool 0-275 90 70 90

Low Temperature 0-200 80 60 80Moderate Temp. 250-350 95 80 95

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4. Install segment retainer (item 30) into the segment retainer housing (item 28) and

install the proper number of shear screws (item 29).

5. Install pickup ring (item 35) in segment retainer housing.

6. Place segment retaining ring (item 34) on connector mandrel (item 27) and install

connector mandrel in segment retainer.

7. Place mandrel (item 50) in vise and clamp just above wicker threads

8. Move connector mandrel assembly up from the bottom of the mandrel. Caution: O-ring

friction will require the use of some driving force. Care must be taken not to damage

the seal diameters of the mandrel. A wooden block struck with a rubber mallet will

drive assembly onto mandrel.

9. Line segment slots up with groove on mandrel.

10. Place segment retainer housing (item 28) in the vise.

11. Install ring segments (item 36) and segment retaining ring (item 34).

12. Install segment retainer housing (item 28) over ring segments (item 36). Pickup ring

(item 35) will be shouldered against piston end of connector mandrel (item 27).

13. Install snap ring (item 41).

14. Install setting sleeve (item 40). LEFT-HAND THREAD.

15. Install lower seal ring (item 45).

16. Install lower seal ring retainer (item 43).

17. Install shock absorber (item 46).

18. Install shear ring retainer (item 47).

19. Install shear ring (item 48) and move shear ring retainer back over shear ring.

20. Install cap screws (item 49).

21. Install bottom sub (item 51).

22. Install connector mandrel ring (item 25).

23. Install ring carrier (item 24) and lock ring (item 23).

24. Install lock ring retainer (item 22) into packing element mandrel (item 19).

25. Make up packing element mandrel onto connector mandrel. LEFT-HAND THREAD.

26. Make up slip (item 21), slip ring (item 26), and cone assembly onto segment retainer

housing. LEFT-HAND THREAD.

27. Install torque pins (item 20).

28. Install lower gage ring (item 17) and packing element system (item 12, 14, 16).

29. Install upper gage ring (item 11) on receptacle (item 4) and install receptacle on

packing element mandrel (item 19).30. Make up top sub (item 2).

Checking correct assembly of packers all size: It is important the ring segments of the model

"MFH" packers be positioned and retained correctly Therefore each packer must be checked

at assembly in the following manner:

1. Strike lower end of mandrel with a rubber mallet.

2. Repeat on upper end.

3. Repeat above steps, checking mandrel movement each time. Packer is assembled

correctly if mandrel does not move more than 3/8 inch in either direction.