Wft Em Brochure

8/10/2019 Wft Em Brochure

http://slidepdf.com/reader/full/wft-em-brochure 1/20

EMPULSE™ - ELECTROMAGNETIC MWD

PRECISIONPULSE – MUD PULSE MWD

DRILLING SERVICES



EMpulseTM 2

Table of Contents

Introduction........................................................................................................................................................... 3

Tools Overview...................................................................................................................................................... 4

ElectroMagnetic MWD ....................................................................................................................................... 4

PrecisionPulse MWD.......................................................................................................................................... 5

EM-HEL MWD ................................................................................................................................................... 5

Electromagnetic MWD - EMpulse™ .................................................................................................................. 6

Simple, rapid installation at the rigsite ............................................................................................................... 6

Reduced tool inventory / mobilization................................................................................................................. 6

Increased application.......................................................................................................................................... 6

No restriction on drilling fluid characteristics.................................................................................................... 6

Two-way communication with the MWD tool ..................................................................................................... 6

Drilling optimization........................................................................................................................................... 7

Reduced survey / connection times...................................................................................................................... 7

Reduced fishing / lost in hole costs ..................................................................................................................... 7

Improved reliability............................................................................................................................................. 7

Principle of Electromagnetic Transmission ........................................................................................................ 8

Extended Range System........................................................................................................................................ 9

Advantages of extended range versus wet connect............................................................................................ 10

MWD measurements versus drilling operations conditions.............................................................................. 10

Insulated Casing.................................................................................................................................................. 11

Description of the Weatherford EMpulse™ System........................................................................................ 12

EMpulse™ tool carrier / emitter sub ................................................................................................................ 12

EMpulse™ tool carrier - mechanical characteristic......................................................................................... 13

EMpulse™ Sensor Probe Description ............................................................................................................... 15

Surface installation - no lost rig time, no adaptation of rig equipment............................................................. 15

EMpulse™ Tool................................................................................................................................................... 16

EMpulse™ Sensor Description .......................................................................................................................... 17

Directional sensor............................................................................................................................................. 17

Universal Gamma Ray Module.......................................................................................................................... 18

Oriented Gamma Ray (OGR) option................................................................................................................. 18

Annulus Pressure Module................................................................................................................................... 19

General Specifications ...................................................................................................................................... 19

Applications ...................................................................................................................................................... 19

EMpulse™ Questionnaire .......................................................................................Error! Bookmark not defined.

Mud Pulse MWD – PrecisionPulse .................................................................................................................... 20



EMpulseTM 3

Introduction

Weatherford International, Ltd. provides equipment and services used for the drilling,

completion, and production of oil and natural gas wells. The company operates through four

divisions: Evaluation, Drilling & Intervention Services; Completion & Production Systems;

Precision Drilling International; and Pipeline & Specialty Services.

The Evaluation, Drilling & Intervention Services (EDI) division provides a range of oilfield

products and services, including drilling services and equipment; cased hole and open hole

wireline services; well construction and installation services; cementing products and equipment;

underbalanced systems; fishing and intervention services; liner systems; and expandable solid

tubular systems.

One of two primary business units within EDI, Performance Drilling & Evaluation Services,

(PD&E) concentrates on Weatherford’s emerging markets, including drilling services, wireline

services, underbalanced systems, and well testing services, and geoscience services.

PD&E specializes in Measurement While Drilling, Logging While Drilling and all aspects of

Directional and Horizontal Drilling technologies.

Aggressive R&D initiatives continue to provide the industry with innovative technologies, many

of which will incorporate EM telemetry.



EMpulseTM 4

Tools Overview

ElectroMagnetic MWD

Weatherford’s EMpulse™ technology has made considerable advances since its introduction in1987. The ability of the EM-MWD to circumvent some of the limitations of the more

conventional mud-pulse telemetry systems has led to an increasing scope for application of the

technology.

In the following examples the EMPulse™ successfully transmitted real time data in very deep

wells using the standard set-up:

Company Location TVD ft MD ft

U.P.R. Utah, USA 18,500 20,000

AMOCO Wyoming, USA 18,000 18,000

BP Colombia 15,000 16,000

TOTAL Yemen 14,500 15,800

BP Oklahoma, USA 14,500 14,500

BURLINGTON Canada 13,780 16,740

The electronic components specifications, mounting techniques and internal mechanical

assemblies of the current EMpulse™ tool were completely reviewed in 2001 to operate in theharshest environments for air, mist and under-balanced drilling applications. The entire fleet

went through a retrofit process between 2002 and 2004. As a direct result the MTBF increased by

250% (2000 hours) drilling with conventional fluid and by 350% (1200 hours) in under-balanced

drilling environment.

Weatherford’s current generation EMpulse™ system is able to provide the following data,transmitted from downhole to surface, in real-time:

Directional Surveying

Annulus Pressure (PWD)

Formation Gamma Ray

Oriented Gamma Ray (OGR)



EMpulseTM 5

PrecisionPulse MWD

The PrecisonPulse system offers the high reliability of the EMpulse™ sonde-based tools and the

AES pulser from the HEL system allowing the system to perform in hostile drilling fluid

handling up to 80 lbs/bbl of lost circulating material (LCM).

The PrecisionPulse is retrievable depending on the drillstring and bottom hole assembly

configuration.

This Product was commercially introduced in August 2004 and has been successfully deployed

globally in North America, South America, Europe and the Middle East.

The current system is able to provide the following data, transmitted from downhole to surface,in real-time:

Directional Surveying

Formation Gamma Ray

EM-HEL MWD

EM transmitter development has lead to full incorporation with the HEL LWD collar mounted

suite of tools and the RevolutionTM

Rotary Steerable System. Successful jobs were performed

with the EM-HEL, Gamma Ray, Bore/Annulus pressure and Multi-Frequency Resistivity (MFR)

in North America and the Middle East in underbalanced drilling conditions (SPE 92617).

Today’s generation of EM-HEL system is able to provide the following data, transmitted from

downhole to surface, in real-time:

Bore/Annular Pressure (BAPTM

)

High-Temperature Gamma Ray (HAGR TM

)

Multi Frequency Resistivity (MFR TM)

Azimuthal Density (AZDTM

) and Thermal Neutron Porosity (TNPTM

)

RSS data

Environmental Severity Measurement (ESMTM

) data is available in memory mode only.

IDS Batteries EMTBAP

Pulser CMS GR Battery BTR CDS



EMpulseTM 6

Electromagnetic MWD - EMpulse™

This advanced system of Electromagnetic Data Transmission provides several major benefitsover traditional mud pulse telemetry systems, which result in significant operational time, and

subsequent cost savings.

Simple, rapid installation at the rigsite

Surface equipment can be installed at the rigsite in less than one hour without any modifications

to the rig package or blow out preventors. Only two surface cables are deployed; one connected

to the surface casing and a second cable acting as an earth antennae. For offshore operations the

earth antenna is referred to as a seabed antenna and is deployed with a supply boat. The surface package consists of a transceiver/interface coupled to a PC computer, a graphic printer and rig

floor, remote display. Additional remote display workstations may be positioned as required.

Reduced tool inventory / mobil ization

The Weatherford EMpulse™ sensor is a sonde based design configured for use in a full range of

drillstring tubular and hole sizes. Weatherford stocks a full range of non-magnetic tubulars (toolcarriers) to house the instrument sondes.

Increased application

EMpulse™ telemetry is impervious to drilling and wellbore fluids. The transmission of data is

working with standard mud and is unaffected by loss of drilling fluid returns, the use of air, air-

mist or foam systems, or the use of other multiphase drilling fluid mediums generally associatedwith underbalanced drilling practices.

No restriction on dr illing fluid characteristics

Since the EMpulse™ telemetry is independent of drilling fluid characteristics, hydraulic or

rheological limitations have no effect upon the quality or rate of data transmission. The

EMpulse™ tool employs solid state technologies contributing to a robust overall design andexceptional record of durability. The standard system design provides for an annulus area

between the inside of the drill collar and the outside of the EMpulse™ tool body which is the

same cross sectional area as that of most standard drill collar bores, resulting in no additional

pressure drop across the tool section and no limitations on the use of lost circulation material.

Two-way communication with the MWD tool

A fundamental advantage of the Weatherford EMpulse™ telemetry system is the downlink

ability which allows operators to communicate instructions to the downhole instrumentation

while drilling proceeds. Both uplink and downlink transmissions communicate on the same

channel. The downhole instrumentation can be interrogated or reprogrammed at any time by

direct communications protocol, which is completely independent of the rig or drilling activity.



EMpulseTM 7

Drilling optimization

The drillstring need only be stationary for a few seconds for survey data to be recorded (less thanconnection time) thus reducing the possibilities of differential sticking or hole sloughing due to

extended periods without circulation.

Reduced survey / connection timesDue to the EMpulse™ system’s independence from drilling hydraulics, there is no lag time or

need to cycle pumps for synchronization purposes when survey data is being transmitted or to re-

sync after anomalous drilling hydraulics incidents.

Reduced fishing / lost in hole costs

Weatherford has designed its latest generation of EMpulse™ tool to allow, in certain BHA

configurations, that the downhole EMpulse™ tool electronics can be wireline retrievable. This

allows for more efficient fishing operations and significantly reduces potential lost in hole costs.

Improved reliability

The Weatherford EMpulse™ tool is entirely solid state electronics, having been designed, from

the outset, to operate in harsh environments; air, mist and multiphase underbalanced horizontal

drilling applications.



EMpulseTM 8

Principle of Electromagnetic Transmission

The EMpulse™ injects an electric current into the formation around the hole. An electromagnetic

wave is created, and propagates through the formation with the drillstring and casing acting as awave guide.

Electromagnetic Transmission System

Transmitter-

Receiver

Earth

Antenna

Bi-directional

Transmission

Emitting

Antenna Drill BitInjected

Current

Propagation of electromagnetic waves along the drillstring is strongly enhanced by the guiding

effect of the electrically conductive drillstring.

Signal propagation is dependent on the nature (resistivity) of the formations traversed by the

electromagnetic waves, and on the frequency of the waves carrying the information. Although

the EMpulse™ system can be configured to operate at any depth in practically any formation, thesystem’s set-up is determined by a number of factors which may contribute to signal attenuation.

Well profile and formation resistivities are the variable factors used to model communications

characteristics and determine if electromagnetic transmission is feasible. A basic well planquestionnaire and an offset open hole resistivity log are used to model conditions for these

purposes.



EMpulseTM 9

Extended Range System

The Extended Range (ER) system allows the use of EM transmission where the conventional

EMpulse™ system cannot perform due to excessive depth or ‘barrier’ formations whichcontribute to signal attenuation. This patented system uses the proven technology of the

EMpulse™ tool (Deviation, Gamma Ray, Annulus Pressure) combined with a mono conductor

wire line antenna which is used to traverse formations problem. (SPE 74461)

In addition to the standard EMpulse™ equipment, a wireline unit will be mobilized for the ER

operation.

The antenna cable is stabbed into the downhole tool by means of a wet connect assembly. Upon

installation the wireline is cut and a landing basket, located inside the drill pipe box connection,

to retain the upper end of the antenna. Installation of the cable antenna on initial rig-up takes

around one hour for an antenna length of 2000 meters. Subsequent to installation no furtherhandling of the wireline is required until tripping out of the hole. Once installed, the wireline

presents no further intervention problems on connections or for the use of in line underbalanced

drilling check valves. The system is designed for retrieval of the cable (wireline) whatever the

configuration whenever the drillstring configuration allows.

WetConnector

EM-MWD

ElectricCable

HangingSub

Earth AntennaTransmitter Receiver



EMpulseTM 10

Advantages of extended range versus wet connect

No need to retrieve the cable for pipe connections.

No excessive stationary and pumps off time during connections.

No wireline cable through the gooseneck, swivel and kelly; no hydraulic pack off or

line wiper required.

Downhole measurements can be performed during tripping (multishot survey) and

pipe connections.

MWD measurements versus drilling operations conditions

Drilling OperationsMeasurement

System Standard Fluid Compressible Fluid Tripping Pipe Connection

Steering Tool Wet Connect YES YES NO NO

Mud Pulse MWD YES NO NO NO

EMpulse™ YES YES YES YES



EMpulseTM 11

Insulated Casing

A new alternative system called “Coated Casing” has been developed to overcome

electromagnetic transmission problems and is also a patented technology. The principle of thissystem is to apply an external coating to the casing to improve the EM transmission. This

technology can only be used in new wells, as opposed to re-entry applications unless the re-entry

is performed close enough to surface.

A successful trial was achieved in Southern North Sea with Shell U.K. Exploration and

Production, where EMpulse™ transmitted inclination, azimuth, toolfaces, gamma ray and

annulus pressure while drilling the 6” hole underbalanced below the Zechstein formation (SPE

81628).

On the illustration below, the coating of the casing is represented in blue. The necessary length of

coated casing is determined by modeling to allow direct transmission of the EMpulse™, as

opposed to the transmission with the antenna cable with the Extended Range.

White coated casing joints, ready to be run in the hole

Coated casing joints being run in the hole



EMpulseTM 12

Descript ion of the Weatherford EMpulse™ System

The EMpulse™ downhole tool assembly consists of three basic parts: (1) the EMpulse™ tool

(sensors, transceiver, electronics, and battery section), (2) the EMpulse™ Tool Carrier whichhouses the tool and forms an integral part of the drillstring and (3) the Emitting Sub which is an

electrical insulator designed to interrupt drillstring conductivity.

EMpulse™ tool carrier / emitter sub

The basic EMpulse™ DC line consists of two non-magnetic tubular sections, inside of which the

EMpulse™ tool is located. The EM-MWD DC line is designed to house the EMpulse™ tool

safely & securely as an integral part of the bottom hole assembly and is made in two sections:

1. The upper section called the Emitting Sub (about 3.5m long) Enables the creation of theEM transmission.

2. The lower section, called the Tool Carrier (about 6.0m long) supports the EMpulse™

tool (containing the electronics, sensors, transmitter and powerpack).

Weatherford has the following Tool Carrier diameter sizes available:

Tool Carrier Diameter Connection

9-1/2" API 7-5/8” Reg BxB

8" (Standard) API 6-5/8” Reg BxB

8” (Flex) API 6-5/8” Reg BxB

6-3/4” (standard) API 4-1/2” IF BxB

6-3/4” (Flex) API 4-1/2” IF BxB

6-1/4” API 4” IF BxB

4-3/4” API 3-1/2” IF BxB

3-1/2” (Flex) Acme 2-7/8” stub

3-3/8” Acme 2-7/8” stub

3-1/16” Acme 2-11/16-4 stub

The complete tool carrier (Emitting Sub & Tool Carrier) is manufactured to meet the API Spec 7

certification. Connections follow normal standard oilfield practise, depending upon collar

diameter however special connections can be manufactured to meet a specific needs.



EMpulseTM 13

EMpulse™ tool carrier - mechanical characteristic

Outside Diameter

System Inch 3"1/16 3"3/8 3"1/2 Flex 4"3/4 6"1/4 6"3/4 6"3/4 Flex 8" 9"1/2

mm 77.8 85.7 88.9 120.6 158.7 171.1 171.1 203.2 241.3

Emitting Sub Inch 3"1/16 3"3/8 3"1/2 4"3/4 6"1/4 6"3/4 6"3/4 7”3/4 9"1/2

mm 77.8 85.7 88.9 120.6 158.7 171.1 171.1 196.9 241.3

Tool Carrier & Inch 3"1/16 3"3/8 3"1/2 4"3/4 6"1/4 6"3/4 6"3/4 8" 9"1/2

Muleshoe mm 77.8 85.7 88.9 120.6 158.7 171.1 171.1 203.2 241.3

Inside Diameter

Emitting Sub Inch 2"5/32 2"5/32 2"5/32 2"1/4 2"1/4 2"13/16 2"13/16 2"13/16 3"

mm 54.6 54.6 54.6 57.1 57.1 71.4 71.4 71.4 76.2

Tool Carrier & Inch 2”5/32 2”5/32 2”5/32 3"11/64 3"11/64 3"15/16 3"15/16 3"15/16 4"13/32

Muleshoe mm 54.6 54.6 54.6 83 83 100 100 100 112

Length

Emitting Sub ft 7.3 ft 7.3 ft 7.3 ft 10.2 ft 10.5 ft 10.7 ft 10.7 ft 11.3 ft 12.3 ft

meter 2.19 2.19 2.19 3.10 3.19 3.28 3.28 3.46 3.75Tool Carrier ft 19.1 ft 19.1 ft 19.1 ft 19.7 ft 19.7 ft 19.7 ft 19.7 ft 19.7 ft 19.7 ft

meter 5.74 5.74 5.74 6.00 6.00 6.00 6.00 6.00 6.00

X-Over ft - - - option 1.2 ft 1.2 ft 1.2 ft 1.2 ft 1.2 ft

meter - - - option 0.35 0.35 0.35 0.35 0.35

Muleshoe ft 2 ft 2 ft 2 ft 3.2 ft 3.2 ft 3.2 ft 3.2 ft 3.2 ft 3.2 ft

meter 0.6 0.6 0.6 0.95 0.95 0.95 0.95 0.95 0.95

Total length

MWD Assembly ft 28.4 ft 28.4 ft 28.4 ft 33.1 ft 34.2 ft 34.8 ft 34.8 ft 35.4 ft 36.4 ft

meter 8.53 8.53 8.53 10.5 10.49 10.58 10.58 10.76 11.05

Weight in Air

MWD Assembly kg 160 230 240 560 1290 1400 1400 2130 tn 3180

lbs 332 493 525 1230 2830 3065 3065 4690 7000

Connections

2"11/16-4stub ACME

2"7/8 stub ACME

2"7/8 stub ACME

API3"1/2 IF

BxB

API4" IFBxB

API4"1/2 IF

BxB

API4"1/2 IF

BxB

API6"5/8 Reg

BxB

API7"5/8 Reg

BxB

Max Recommended Flow Rate

Standard Collar ID gpm 160 160 160 400 400 800 800 800 1200

Standard Collar ID L/mn 600 600 600 1500 1500 3000 3000 3000 4500

Make up torque

ft.lbs 3540 5500 5500 8800 22900 28200 28200 44000 73000

m.daN 480 750 750 1200 3100 3840 3840 6000 9900

Equivalent stiffness

Inch OD 3"1/16 3"3/8 3"1/16 4"17/32 6"3/32 6"19/32 6"19/32 7"25/32 9"11/32

mm OD 77.8 85.7 77.8 113.5 154.8 167.5 167.5 197.6 237.3

Sub + DC Inch ID 2”5/32 2”5/32 2”5/32 2"1/4 2"1/4 2"13/16 2"13/16 2"13/16 3"

mm OD 54.6 54.6 54.6 57.1 57.1 71.4 71.4 71.4 76.2

Dog Leg (standard line)

Sliding 116º /100ft 66º /100ft 116º /100ft 25º /100ft 20º /100ft 18º /100ft 66º /100ft 15º /100ft 14º /100ft

Rotating 38º /100ft 27º /100ft 38º /100ft 16º /100ft 14º /100ft 13º /100ft 27º /100ft 10º /100ft 7.5º /100ft

All system tubulars are made of non-magnetic alloy.



EMpulseTM 14



EMpulseTM 15

EMpulse™ Sensor Probe Description

The EMpulse™ Sensor probe is located inside the Tool Carrier/Emitting Sub. The EMpulse™

probe consists of three standard sections:

1. A lithium battery housing (BAT), which is the power source for the MWD sensors,

system control, data memory, signal transmission and reception;

2. The electronics module & transmitter package (BTR), which consists of the transceiver,

memory modules, micro-processors and control electronics;

3. The orientation module (CDS) which measures the earth’s gravitational and magnetic

fields (inclination, azimuth) as well as downhole temperature.

Optional Logging While Drilling (LWD) sensors; gamma ray, orientated gamma ray and annulus

pressure sensors can be added to the basic EMpulse™ assembly.

The annulus area between the EMpulse™ tool and the inside diameter of the non-magnetic tool

carrier is equivalent to the cross sectional area of a standard drill collar bore. This allows for

passage of lost circulation material and results in no additional hydraulic system pressure losses.

As Weatherford continues to develop its EMpulse™ and LWD technologies, additional sensors

are being developed to enhance the system’s capabilities and performance.

Surface installation - no lost rig time, no adaptation o f rig equipment

The rig site installation is particularly simple and can be accomplished in a few hours. It basically

involves the running of two surface cables, which act as the receiving and surface transmissionantennae.

One of the cables is attached to the surface casing, while the second is grounded with metal

stakes or attached to a nearby existing wellhead. In offshore applications the second cable is

attached to a metal anchor and grounded on the sea bed about 100m from the structure.

The surface package consists of a transceiver / interface coupled to a PC computer, a graphic

printer and rig floor remote display. The transceiver sends orders to the downhole tool and also

receives and decodes signals transmitted by the downhole instrument package. The downhole

tools may be interrogated for information at any time by operator commands from surface.

Computed real time data is displayed on monitor screens and output to the graphics printer and

rig floor monitor. Additionally, all data is saved in memory for back-up, analysis and electronic

transfer purposes.



EMpulseTM 16

EMpulse™ Tool

General Specifications :

Drilling Applications Overbalanced, Horizontal, Long,Medium or Short Radius DirectionalDrilling. Underbalanced Drilling. Aerated Mud, Foam/Air Drilling

Operating Temperature (Standard) 300 deg F 150 deg C

Working Pressure (collapse) 15,000 psi

Minimum Preferred Equivalent Mud Density > 0.4 sg at the EM-MWD Tool

Minimum Flow Rate Required None (zero). Pumps Off.

Maximum Flow Rate 9 1/2” 1200 gpm(Standard EM-MWD collar ID) 8”, 6 3/4” 800 gpm

6 1/4”, 4 3/4” 400 gpm3 1/2” to 3 1/16” 160 gpm

Pressure Drop Through Tool No additional friction pressure drop(circulation area equivalent to standarddrill collar inside diameter).

Lost Circulation Material, Max Size 8” & 6-3/4” Collar : 14mm dia ball4-3/4” Collar :10mm dia ball

Corrosive material Subject to analysis & pre-approval

Maximum Bit Pressure No Limitation

Surface Mud Screen or Baffles Not Required / Recommended

Pulsation Baffles Not Required

Transmission Trigger On board programming

Telemetry Trigger Operator interrogation

Fishing Neck 15/16” 24 mm(Retrievable Dependent upon Collar Size)

External Diameter 1-11/16” 43 mm

Length 291” to 330” 7.40 m to 8.00 m

Weight 100 lbs 45 kg

Power Source Lithium Battery

Vibration 200 m/s2 peak sine, 0-50 Hz

Shock 10,000 m/s2, 1 ms, ½ sine

The illustration shows a G4 EM MWD tool equipped with Gamma Ray and Pressure probe

B

AT

T

B

T

R

LE

C

C

SG

x

C

D

S

G

R G

4



EMpulseTM 17

EMpulse™ Sensor Descript ion

EMpulse™ standard tool consists of three modules:

1. BTR Transceiver & Control Electronics Module2. CDS Directional Sensor Module

3. BAT Battery Housing

Additional Logging While Drilling (LWD) sensors can be added to this basic EM-MWD G4 tool.

Directional sensor

3 axis accelerometers

3 axis magnetometers

Temperature probe

The following data is available from the G4 EM MWD tool

Name Description Range Resolution Accuracy

INC Inclination 0-128° 0.0625° 0.1° AZ Azimuth 0-360° 0.125° 1° for INC >5°

MTF Magnetic Tool Face 0-360° 2° 2° for INC < 5

GTF Gravity Tool Face 0-360° 2° 2° for INC > 5

MODH Magnetic Field Module 0-71µT 0.035µT 0.2µT

INCH Magnetic Field Dip Angle(unsigned)

0-90° 1° 0.2°

Tin CDS Internal Temperature 0-125°C 0.5°C 1°C

CON Battery Consumption 0-65536UG 64UG

Hx Magnetic Field on X axis. -71µT-+71µT 0.018µT < 0.2<µT

Hy Magnetic Field on Y axis. -71µT-+71µT 0.018µT < 0.2<µT

Hz Magnetic Field on Z axis. -71µT-+71µT 0.018µT < 0.2<µTGx Gravity Field on X axis. -1.10G+1.10G 0.27mG 2mG

Gy Gravity Field on Y axis. -1.10G+1.10G 0.27mG 2mG

Gz Gravity Field on Z axis. -1.10G+1.10G 0.27mG 2mG

Transmission options include downhole calculation of direction and inclination data prior to

sending or transmission of all raw parameter readings. Data integrity is greatly enhanced by

transmitting raw magnetic and gravity vector measurements. This allows for detection of

magnetic anomalies both natural and introduced (such as those caused by the proximity of casing

from a nearby well) and is also an effective means to verify functional operation of the sensors.

MTF/GTF switching: Operator selectable any timeTool face update period at surface: 6 tool faces per 96 seconds

Survey time, seconds: 96 seconds from order to display on rig floorDirectional measurement point, ft: 15 ft from bottom of collar



EMpulseTM 18

Universal Gamma Ray Module

The Universal Gamma Ray Module is programmable at the surface as a Standard Gamma

Ray or an Oriented Gamma Ray.

This sensor measures the naturally occurring gamma rays emanating from theformation. Gamma ray logs are normally plotted against true vertical depth and

measured depth and as apparent API units. They can be displayed in real-time along with

Directional control data and are saved in downhole memory and downloaded for reviewafter the fact.

General Specifications :

Gamma Ray Sensor type Crystal Csi with photomultiplier

Gamma Ray Range 0 to 5000 counts, converted to apparent API units

Gamma Ray Sensor Resolution 1 count

Temperature Sensor type Platinum wire

Temperature sensor resolution 1.0 degree C

Real-time GR update interval 32 seconds

Memory Type Non volatile

Memory sampling interval 16 seconds

Memory capacity 200,000 data sets (37 days)

Gamma Ray sensor length 0.945m 37.2”

Sensor position 0.70 m from bottom of EM-MWD probe

Bed Resolution 0.5m at 30m/hour ROP

Operating Temperature 300 deg F 150 deg C

Working Pressure (collapse) 15,000 psi

Gamma Ray sensor module is connected to the bottom of the standard EMpulse™ tool,and does not extend the length of the EMpulse™ Tool Carrier. Gamma Ray data is

corrected for the wall thickness of the tubular housing, and mud density to determine

apparent API values.

Oriented Gamma Ray (OGR) option

The OGR option incorporates a shield coupled with high side positional sensor and Dynamic

Update software. The system measures and transmits gamma counts from both the high and

low sides of the hole in real time while drillstring rotation is in progress.

The OGR option provides valuable geosteering information, resulting in higher percentage of

wellbore in pay zone in thin bedding planes and in significant rig time savings which can not

be achieved with conventional gamma ray tools

B

AT

T

B

T

R

LE

C

C

SG

x

C

D

S

G

R G

4



EMpulseTM 19

Annulus Pressure Module

Weatherford’s Strain Gauge pressure monitor is attached to the bottom of the standard

EMpulse™ tool.

A muleshoe, containing the pressure port between the AP sensor (which is located inside the

EMpulse™ Tool Carrier) and the annulus is located immediately below the standard Tool

Carrier. The length of this AP muleshoe varies from 0.65m to 1.0m. The outside diameter ofthe AP muleshoe is the same size as the Tool Carrier.

General Specifications

External diameter 1"11/16 43 mm

Length 24.1” 613 mm

Retrievable (Depending on Drill Collar size)

Fishing Neck 15/16" 24mmOperating Temperature 300 °F 150 °C

Collapse Pressure 15 000 PSI .

Memory Type Non-Volatile

Memory capacity 200k data sets. A data set is defined as a recording of time,pressure, temperature and optionally battery voltage. 200ksets equals 14 days @ 6 second intervals.

Sampling Interval Minimum 1 Second intervals. Sixteen different intervalsettings are available.

Sensor Specifications

Pressure Sensor Strain Gauge

Range 0-10,000 psi

Resolution 4 x 10-6 of FSR up to 150 °

Accuracy Standard 10-3 FSR

Temperature Sensor Platinum Wire

Resolution 1.5 °C

Appl ications

The Weatherford Annulus Pressure Sensor has two main applications:

1. Real Time MWD sensor: Minimum update interval 24 seconds. (Sensor temperature

is not available in Real Time). Additional data stored in memory at programmable

intervals (minimum 6 seconds).

2. Stand alone as memory module. Installation anywhere in the drillstring. (Multiple

gauges may be run in different locations within the drillstring.) The Pressure module

may be run together with a Gamma Ray module.

The standard configuration measures Annular Pressure. A configuration to measure internal

pipe pressure is also available upon request.



EM l TM 20

Mud Pulse MWD – PrecisionPulse

The PrecisionPulse transmits data using positive pulse telemetry. The downhole tool assembly

consists of the orientation module and Gamma Ray from the EMpulse™ tool, a driver and theAES pulser. The tool string fits into a muleshoe sub and drill collar.

The basic PrecisionPluse drill collar line consists of two non-magnetic tubular sections, inside of

which the PrecisionPulse tool is located. The MWD drill collar line is designed to house thePrecisionPulse tool safely and securely as an integral part of the bottom hole assembly.

Weatherford has the following muleshoe and drill collar diameter sizes available:

Tool Carrier Diameter Connection

9-1/2" API 7-5/8” Reg BxP

8" API 6-5/8” Reg BxP

6-3/4” API 4-1/2” IF BxP

6-1/2” API 4-1/2” XH BxP4-3/4” API 3-1/2” IF BxP

3-1/2” Flex Acme 2-7/8” stub BxP

3-3/8” Acme 2-7/8” stub BxP

3-1/16” Acme 2-11/16-4 stub BxP

The muleshoe and drill collar are manufactured to meet the API Spec 7 certification. Connections

follow normal standard oilfield practice, depending upon collar diameter however special

connections can be manufactured to meet a specific need.

Flow rate in gpm versus collar size

OD collar ID collar Max Flow

3 1/16” 2.25” 160

4 3/4” 2.81” 4006 3/4” 3.25” 700

8” 3 1/2” 1200

9 1/2” 4” 1200

Orientation module data specifications

OD collar ID collar Max Flow OD collar

3 1/16” 2.25” 160 3 1/16”

4 3/4” 2.81” 400 4 3/4”

6 3/4” 3.25” 700 6 3/4”

8” 3 1/2” 1200 8”

9 1/2” 4” 1200 9 1/2”

Dog Leg severity specifications

Rotary Sliding Connections3 1/16 & 3 ½ Flex 38° 116° 2 11/16 & 2 ⅞ SA

3 ⅜ & 4 ¾ Flex 27° 66° 2 ⅞ SA & 3 ½ IF

4 ¾ 16° 25° 3 ½ IF

6 ¾ 13° 18° 4 ½ IF

8 15° 10° 6 ⅝ REG

Wft Em Brochure

Documents

Transcript of Wft Em Brochure