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Sir William Smith Road, Kirkton Industrial Estate,Arbroath, Angus, Scotland, U.K. DD11 3RD

Tel: +44 (0) 1241 877776. Fax: +44 (0) 1241 871037E-mail: sales@pioneeroiltools.comWebsite: www.pioneeroiltools.com

CEMENTING PLUGSAND

ANCILLARY EQUIPMENT

CP 07/05 Copyright 2005

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CONTENTS

Table of contentsPage Content

01 Contents page

02 Introduction

0304 Surface Launched Anti-rotational plugs

0506 Subsea Launched Standard plugs

0708 Subsea Launched Anti-rotational plugs

0910 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

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INTRODUCTION

Pioneer Oil Tools Ltd is pleased to provide a range of products related to the downhole cementingprocess. 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 thephysical and chemical characteristics required from the equipment item. Other materials maybe specified by customer.

Material selectionMaterial Description Temperature limits

NBR High Nitrile (Acrylonitrile content 35 to 45%). Excellent resistance

to mineral based fluids and hydrocarbon fuels. Strength andresilience is reasonable but low temperature performance ispoor.

-45C to +100C(can go to 120C

with special processsing)

Medium Nitrile (Acrylonitrile content 27 to 34%). Resistanceto mineral based fluids is excellent, but resistance to fuels ismoderate.

Low Nitrile (Acrylonitrile content 18 to 25%). Strength, resilienceand abrasion resistance is reasonable, and resistance tomineral based fluids is also reasonable. This material has a lowtemperature capability.

HNBR General performance as for NBR but better abrasion and ozoneresistance. It has good resistance to Crude oil, Hydrogen

Sulphide and Amines: another feature of HNBR over NBR is itshigher temperature range.

-45C to +175C

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. Oursales and design team are anxious to demonstrate our range of products and versatility, bysolving your tooling problems.

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SURFACE LAUNCHEDANTI-ROTATIONAL PLUGS

Pioneer Oil Tools Ltd surface launched anti-rotational cementing plugs are designed to providea firm wiping action on the casing walls, a good seal for the cement when being pumped (toavoid contamination) and are easily drillable.

Operation of the plugs is simple: the bottom plug is loaded, followed by the cement and thenthe top plug. The plug set is then pumped down to the required location. The bottom pluglatches at the required level into a baffle joint or float collar. Pressure is applied to the top plugresulting 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 thenallowed to set.

Pioneers 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, theseanti-rotational measures ensure that the plugs can be drilled through easily with a PDC bit.

SLNT1338T / SLNB1338T SLNT0963T / SLNB0963T

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SURFACE LAUNCHEDANTI-ROTATIONAL PLUGS (Contd)

The plugs are manufactured from two colours of rubber for easy identification of the top andbottom plugs and to determine when the lower plug has been drilled through. Top plugs aremoulded from black rubber, bottom plugs from red. Cementing plugs come in a range of sizesand are capable of accepting different pressures. Specifying details are as follows, with T

indicating top plug and Bfor bottom plug:

Surface launched anti-rotational plugsProductcode

Size Maxpressure

Maxtemperature

SLNTSLNB

20 x 18 2000 PSI

SLNTSLNB

16 2700 PSI

SLNT1338TSLNB1338T

14 x 13 6000 PSI 175

SLNT0963TSLNB0963T

10 x 9 8000 PSI 175

SLNTSLNB

7 x 7 8000 PSI

When ordering specify the following: Diameter of plug required. Minimum constraint to plug travel. Working pressure and temperature. Shear disc pressure required.

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SUBSEA LAUNCHEDSTANDARD PLUGS

Pioneer Oil Tools Ltds subsea launched standard cementingplugs are designed to provide a firm wiping action on the casingwalls, 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 setis connected to the cementing stinger on the drill pipe and

lowered to the correct position. A ball is dropped down thedrill pipe followed by cement. The ball seats itself in the

bottom plug sealing off the lower plug bore. Subsequentpressurisation of the cement column results in the shearpins of the bottom plug shearing, releasing the bottom plug

and cement to travel to a plug receiver (also available fromPioneer Oil Tools Ltd).

When sufficient cement has been pumped, a dart is releasedwhich latches itself into the top plug. Applying pressure

results in the top plug shear pins shearing, releasing the topplug. The top plug can then transmit pump pressure throughthe column of cement; this pressure squeezes the ball intothe lower chamber of the bottom plug allowing the cement

to extrude out through the plugs bottom ports. The cementis 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.

CPN2000E

CPND1338E

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SUBSEA LAUNCHEDSTANDARD PLUGS (Contd)

The plugs are manufactured in two colours of rubber (foreasy identification and to allow operators to gauge which

plug they are drilling through) top plugs in black, bottomplugs in red.

Cementing plugs come in a range of sizes and capable ofaccepting different pressures. Specifying details are asfollows:

Subsea launched standard plugsProductcode

Size Maxpressure

Maxtemperature

CPND2000E 20 x 18 1500 PSI 65C

CPND1600E 16 2000 PSI 65C

CPND1338E 14 x 13 4000 PSI 170C

CPND0963E 10 x 9 5000 PSI 170C

CPND0700E 7 x 7 5000 PSI 170C

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.

Connection requirements for top plug.

Pioneer would be pleased to supply associated equipment of

darts and balls for these items.

CPND0963E

CPND0700E

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SUBSEA LAUNCHEDANTI-ROTATIONAL PLUGS

Pioneer Oil Tools Ltd subsea launched standard cementingplugs are designed to provide a firm wiping action on the casingwalls, 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 plugsand the placing of cement.

The high quality cementing plugs are constructed from

nitrile rubber, aluminium, PVC and nylon. The materialsensure that the plugs can be drilled through easily. The plugsare manufactured from red and black rubber, to make easyidentification 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.

CPN1338T

CPND1338T

CPN2000T

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SUBSEA LAUNCHEDANTI-ROTATIONAL PLUGS (Contd)

Cementing plugs come in a range of sizes and capable ofaccepting different pressures. Specifying details are asfollows:

Subsea launched anti-rotational plugsProductcode

Size Max pressure Maxtemperature

CPND2000T 20 x 18 2000 PSI 65C

CPND1600T 16 2700 PSI 65C

CPND1338T 14 x 13 6000 PSI 175C

CPND0963T 10 x 9 8000 PSI 175C

CPND0700T 7 x 7 8000 PSI 175C

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.

Pioneer would be pleased to supply associated equipmentof darts and balls for these items. The plugs are compatible

with the BJ Launch System.

CPND0963T

CPND0700T

CPN0963T

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HPHT SYSTEMHigh Pressure High Temperature

The HPHT system is designed to operate in more difficultenvironmental conditions of high temperature and pressure(up to 175C and up to 15,000 psi).

The plugs are made for surface launching and have operatingcharacteristics similar to the standard surface launched plugfor good wiping of the casing, a good seal for the cementwhen 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 usedat higher pressures than the standard plug. The other highquality 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 easyidentification.

The plugs have optional receiving mechanisms for thebottom plug and can be made with either a solid aluminiumtop to the top plug or fitted with an aluminium poppet valveto control pressure between the plugs.

Plugs may be supplied as a set of top and bottom plug or asan individual plug.

CPHD1338ST

CPHD0963ST

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HPHT SYSTEM (Contd)

Cementing plugs come in a range of sizes from 7 to 14.Specifying details are as follows:

HPHT system

Product code SizeCPHD1338ST 14 x 13

CPHD0963ST 10 x 9

CPHD0700ST 7 x 7

The code letter D indicates a set of plugs and can be omitted if single plugs are

required. If a poppet valve is required a PV code should be used at the end of the

item code.

When ordering the following should be specified: Diameter of plug required. Minimum constraint to plug travel.

Working pressure and temperature. Receiver connection requirements. Poppet Valve required or not.

Pioneer would be pleased to supply associated equipment(cement heads, etc) with this equipment if required.

CPHD0963ST-PV

CPHD0700ST-PV

CPH0963ST-PVCPH0700ST-PV

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ANCILLARY EQUIPMENT

Pioneer Oil Tools Ltd is able to supply a range of ancillary equipment associated with cementingplugs and the cementing process. These items include

Darts

BallsFloat valves and shoesCementing Heads

All items are made from similar high quality materials as the plugs with nitrile rubber, aluminiumand nylon parts where items are for downhole use and need to be PDC drillable.

When specifying requirements ensure that the whole system is compatible dimensionally andin operating environment parameters.

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ANCILLARY EQUIPMENTFLOAT COLLARS AND SHOES

Pioneer produces a range of dependable float collars for avariety of casing sizes for use with Pioneer cement plugs.

The primary feature of all pioneer float collars is the non-

return valve. This mechanism allows wellbore/drilling fluidsand back-flowing cement to be excluded from the casingstring.

This feature gives the tool its name as each joint run abovethe valve displaces its own volume of drilling fluid and henceallows the string to partially float, mitigating a portion ofthe weight of the string.

The float collar also incorporates an anti-rotational feature, aquality that permits the easy drilling of Pioneer anti-rotationalcementing plugs.

In addition a range of float shoes is available to match eachfloat collar.

PVN0963B

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ANCILLARY EQUIPMENTCEMENT HEADS

Pioneer Oil Tools Ltd has a series of cement heads to be usedin conjunction with the range of cement plugs and darts orwith other suppliers equipment.

These cement heads feature a quick release mechanism thatpermits rapid connection/disconnection of the cement headfrom the string.

The cement heads are made from high quality materials andare pressure tested.

Cement headsProduct Tested

pressure

Working

pressure

14 Cement Head 11250 PSI 7500 PSI

10 Cement Head

14 Cement Head

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Sir William Smith Road, Kirkton Industrial Estate,Arbroath, Angus, Scotland, U.K. DD11 3RD

Tel: +44 (0) 1241 877776. Fax: +44 (0) 1241 871037E-mail: sales@pioneeroiltools.comWebsite: www.pioneeroiltools.com

CEMENTING PLUGSAND

ANCILLARY EQUIPMENT

CP 07/05 Copyright 2005As the policy of Pioneer Oil Tools Ltd is one of continual improvement,we reserve the right to change designs or specifications without notice.