cementing plugs and ancillary equipment

16 Pages·2016·4.45 MB·English

Sir William Smith Road, Kirkton Industrial Estate,
Arbroath, Angus, Scotland, U.K. DD11 3RD
Tel: [phone]. Fax: [phone]
E-mail: [email protected]
Website: www.pioneeroiltools.com
CEMENTING PLUGS
AND
ANCILLARY EQUIPMENT
CP 07/05 Copyright 2005
CEMENTING PLUGS AND
ANCILLARY EQUIPMENT
CONTENTS
Table of contents
Page Content
01 Contents page
02 Introduction
03–04 Surface Launched Anti-rotational plugs
05–06 Subsea Launched Standard plugs
07–08 Subsea Launched Anti-rotational plugs
09–10 High Pressure High Temperature system
11 Ancillary equipment
12 Launching darts and balls
13 Float collars and shoes
14 Cementing heads
“When time is of the essence, Pioneer delivers”
1
CEMENTING PLUGS AND
ANCILLARY EQUIPMENT
INTRODUCTION
Pioneer Oil Tools Ltd is pleased to provide a range of products related to the downhole cementing
process. These are mostly-rubber products and standard availability is in the following.

Standard materials:
• Nitrile Butadiene Rubber (NBR) or
• Hydrogenated Acryonitrile Butadiene Rubber (HNBR)
The selection of the material is dependent on the operating environment in the hole and the
physical and chemical characteristics required from the equipment item. Other materials may
be specified by customer.
Material selection
Material Description Temperature limits
NBR High Nitrile (Acrylonitrile content 35 to 45%). Excellent resistance -45ºC to +100ºC(can go to 120ºC
to mineral based fluids and hydrocarbon fuels. Strength and with special processsing)
resilience is reasonable but low temperature performance is
poor.
Medium Nitrile (Acrylonitrile content 27 to 34%). Resistance
to mineral based fluids is excellent, but resistance to fuels is
moderate.
Low Nitrile (Acrylonitrile content 18 to 25%). Strength, resilience
and abrasion resistance is reasonable, and resistance to
mineral based fluids is also reasonable. This material has a low
temperature capability.
HNBR General performance as for NBR but better abrasion and ozone -45ºC to +175ºC
resistance. It has good resistance to Crude oil, Hydrogen
Sulphide and Amines: another feature of HNBR over NBR is its
higher temperature range.
Pioneer has comprehensive experience in the design and manufacture of various types of oil-
industry tools. If your requirements are not covered in this brochure, please contact us. Our
sales and design team are anxious to demonstrate our range of products and versatility, by
solving your tooling problems.
2
CEMENTING PLUGS AND
ANCILLARY EQUIPMENT
SURFACE LAUNCHED
ANTI-ROTATIONAL PLUGS
Pioneer Oil Tools Ltd surface launched anti-rotational cementing plugs are designed to provide
a firm wiping action on the casing walls, a good seal for the cement when being pumped (to
avoid contamination) and are easily drillable.
Operation of the plugs is simple: the bottom plug is loaded, followed by the cement and then
the top plug. The plug set is then pumped down to the required location. The bottom plug
latches at the required level into a baffle joint or float collar. Pressure is applied to the top plug
resulting in the shear disc in the bottom plug bursting. The cement then extrudes through the
bottom plug until the top plug closes and latches with the bottom plug. The cement is then
allowed to set.
Pioneer’s high quality cementing plugs are constructed from nitrile rubber, bronze and nylon.
The plugs incorporate toothed anti-rotational devices that mesh between the top and bottom
plugs and between the bottom plug and the receiver. In conjunction with its nylon core, these
anti-rotational measures ensure that the plugs can be drilled through easily with a PDC bit.
SLNT1338T / SLNB1338T SLNT0963T / SLNB0963T
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CEMENTING PLUGS AND
ANCILLARY EQUIPMENT
SURFACE LAUNCHED
ANTI-ROTATIONAL PLUGS (Cont’d)
The plugs are manufactured from two colours of rubber for easy identification of the top and
bottom plugs and to determine when the lower plug has been drilled through. Top plugs are
moulded from black rubber, bottom plugs from red. Cementing plugs come in a range of sizes
and are capable of accepting different pressures. Specifying details are as follows, with T
indicating top plug and B for bottom plug:
Surface launched anti-rotational plugs
Product Size Max Max
code pressure temperature
SLNT
20” x 18 ⅝” 2000 PSI
SLNB
SLNT
16” 2700 PSI
SLNB
SLNT1338T
14” x 13 ⅜” 6000 PSI 175º
SLNB1338T
SLNT0963T
10 ¾” x 9 ⅝” 8000 PSI 175º
SLNB0963T
SLNT
7 ⅝” x 7” 8000 PSI
SLNB
When ordering specify the following:
• Diameter of plug required.
• Minimum constraint to plug travel.
• Working pressure and temperature.
• Shear disc pressure required.
4
CEMENTING PLUGS AND
ANCILLARY EQUIPMENT
SUBSEA LAUNCHED
STANDARD PLUGS
Pioneer Oil Tools Ltd’s subsea launched standard cementing CPN2000E
plugs are designed to provide a firm wiping action on the casing
walls, a good seal for the cement (to avoid contamination)
and are made of materials that are easily drillable with a PDC
bit.
Operation of the plugs is simple but effective. The plug set
is connected to the cementing stinger on the drill pipe and
lowered to the correct position. A ball is dropped down the
drill pipe followed by cement. The ball seats itself in the
bottom plug sealing off the lower plug bore. Subsequent
pressurisation of the cement column results in the shear
pins of the bottom plug shearing, releasing the bottom plug
and cement to travel to a plug receiver (also available from
Pioneer Oil Tools Ltd).
When sufficient cement has been pumped, a dart is released
which latches itself into the top plug. Applying pressure
results in the top plug shear pins shearing, releasing the top
CPND1338E
plug. The top plug can then transmit pump pressure through
the column of cement; this pressure squeezes the ball into
the lower chamber of the bottom plug allowing the cement
to extrude out through the plug’s bottom ports. The cement
is then allowed to set before drilling through.
The high quality cementing plugs are made of nitrile rubber,
aluminium, PVC and nylon ensuring that the plugs can be
drilled through easily.
5
CEMENTING PLUGS AND
ANCILLARY EQUIPMENT
SUBSEA LAUNCHED
STANDARD PLUGS (Cont’d)
The plugs are manufactured in two colours of rubber (for CPND0963E
easy identification and to allow operators to gauge which
plug they are drilling through) – top plugs in black, bottom
plugs in red.
Cementing plugs come in a range of sizes and capable of
accepting different pressures. Specifying details are as
follows:
Subsea launched standard plugs
Product Size Max Max
code pressure temperature
CPND2000E 20” x 18 ⅝” 1500 PSI 65ºC
CPND1600E 16” 2000 PSI 65ºC
CPND1338E 14” x 13 ⅝” 4000 PSI 170ºC
CPND0963E 10 ¾” x 9 ⅝” 5000 PSI 170ºC
CPND0700E 7 ⅝” x 7” 5000 PSI 170ºC
The code letter D indicates a set of plugs and can be omitted if single plugs are
required.
CPND0700E
When ordering specify the following:
• Diameter of plug required.
• Minimum constraint to plug travel.
• Working pressure and temperature.
• Connection requirements for top plug.
Pioneer would be pleased to supply associated equipment of
darts and balls for these items.
6
CEMENTING PLUGS AND
ANCILLARY EQUIPMENT
SUBSEA LAUNCHED
ANTI-ROTATIONAL PLUGS
Pioneer Oil Tools Ltd subsea launched standard cementing CPN2000T
plugs are designed to provide a firm wiping action on the casing
walls, a good seal for the cement (to avoid contamination)
and made of materials that are easily drillable with a PDC
bit. These plugs also have the additional feature of anti-
rotational teeth between the plugs to facilitate drilling.
The operation of the subsea anti-rotational plugs is very
similar to the standard type. Placement is by the drill string,
utilising darts and balls to control the operations of the plugs
and the placing of cement.
The high quality cementing plugs are constructed from
nitrile rubber, aluminium, PVC and nylon. The materials
ensure that the plugs can be drilled through easily. The plugs
are manufactured from red and black rubber, to make easy
identification of the top and bottom plugs and to aid drilling
operators in identifying which plug they are drilling through.
Plugs are supplied as a set or as single top plugs.
CPND1338T
CPN1338T
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CEMENTING PLUGS AND
ANCILLARY EQUIPMENT
SUBSEA LAUNCHED
ANTI-ROTATIONAL PLUGS (Cont’d)
Cementing plugs come in a range of sizes and capable of CPND0963T
accepting different pressures. Specifying details are as
follows:
Subsea launched anti-rotational plugs
Product Size Max pressure Max
code temperature
CPND2000T 20” x 18 ⅝” 2000 PSI 65ºC
CPND1600T 16” 2700 PSI 65ºC
CPND1338T 14” x 13 ⅜” 6000 PSI 175ºC
CPND0963T 10 ¾” x 9 ⅝” 8000 PSI 175ºC
CPND0700T 7 ⅝” x 7” 8000 PSI 175ºC
The code letter D indicates a set of plugs and can be omitted if single plugs are
required.
When ordering specify the following:
• Diameter of plug required.
• Minimum constraint to plug travel.
• Working pressure and temperature.
CPND0700T
Pioneer would be pleased to supply associated equipment
of darts and balls for these items. The plugs are compatible
with the BJ Launch System.
CPN0963T
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CEMENTING PLUGS AND
ANCILLARY EQUIPMENT
HPHT SYSTEM
High Pressure High Temperature
The HPHT system is designed to operate in more difficult CPHD1338ST
environmental conditions of high temperature and pressure
(up to 175ºC and up to 15,000 psi).
The plugs are made for surface launching and have operating
characteristics similar to the standard surface launched plug
for good wiping of the casing, a good seal for the cement
when being pumped (to avoid contamination) and made of
materials that are easily drillable with a PDC bit.
The use of an aluminium core allows the plug to be used
at higher pressures than the standard plug. The other high
quality materials from which the plug is manufactured are
HNBR rubber and a bronze shear disc in the bottom plug.
The plugs are made from red and black rubber for easy
identification.
The plugs have optional receiving mechanisms for the
bottom plug and can be made with either a solid aluminium
CPHD0963ST
top to the top plug or fitted with an aluminium poppet valve
to control pressure between the plugs.
Plugs may be supplied as a set of top and bottom plug or as
an individual plug.
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