19.0 concept - low cost rotary steerable systems

8/10/2019 19.0 Concept - Low Cost Rotary Steerable Systems

http://slidepdf.com/reader/full/190-concept-low-cost-rotary-steerable-systems 1/13

SLIPGRIP –THE LOW COST ROTARY STEERABLE TOOL

“ Pr ov id i ng r ot ar y st eer ab le f unct iona l i t y

at st eer able mot or pr ices”

Background

Market & Applications

Technology

Commercialisation



Mental Models• Rotary steerable tool means

– Complexity

– High capital cost

– High day rate

– Specialist operators

– Not suitable for low cost applications

• Not necessarily so ….



Market needs• Improved drilling performance

• ROP improvements• Extension to operating envelopes

• Lateral extension

• Cost similar to steerable motors• Low cost of ownership

• Reduced specialist crew numbers

• Minimum MWD• GR only



RST Characterisation

Maintenance and

Service costs

Specialist operators

$$$$$$$$$LIH cost

$$$$$$$$$Capital cost

3-D profile

Geosteering

FEMWD

Closed loop control

SlipGripIntermediatePremium



SlipGrip

Competitor Positioning

Price

Perceived Value

Steerable motors

Premium RST

Intermediate RST



Applications

TTRD3 3/8” prototype

R1 BHADisposable BHA for

mature fields and infill

drilling

DDWCDisposable BHA

Directional control

TBLThrough Bit Logging

SHDe.g. US coal bed

methane

Motor ReplacementRST functionality at

motor prices

SpecialistApplications

Low Cost RST



Technical Description –

Dual operating mode

Lockingpiston

Outer sleeve

Inner sleeve

Torquetransmission

Drill stringconnection

Locking pistonreturn spring

The tool is cycled between directional drilling and performance

drilling mode by a combination of reciprocation and pressure

drop. The locking piston acts to couple the inner and outer sleeve

for performance drilling and decouple the two sleeves for

directional drilling.



As the tool cycles from performance drilling to directional drilling

mode the three concentric stabiliser blades are forced out to

engage with the borehole wall. These blades act to prevent the

outer sleeve from rotating during directional drilling operations.

At the same time as the stabiliser blades are being manipulated

the rotation of the inner sleeve creates a bit offset in a point thebit fashion.

Technical Description –

Directional drilling operations

-

Inner sleeve

Concentric stabiliser Outer sleevePre-load springs



Technical Risks• The product benefits from simplicity

• Principle technical risk

– Slippage during directional drilling– Washouts, collapse

• Mitigation

– Pad design and length,– Anti rotation device

– Weighted bias

– Operations procedures

• Possible limitation due to geology but needs to betested.



Path to Market• Phase 1 Complete

– Proof of concept complete through SMART award

• Phase 2– Investment in commercial prototype and fieldtrial

• Phase 3

– Commercialisation– Sales to third parties

– Revenue from initial sale, annual royalty and

service agreements– Target markets

• USA

• North Sea



Phase 2 Field Trial Project Plan

• Tool design

– 3 3/8”, 4 ¾” or 6 ½” field trial prototypes

• Bench test

• Secure field trial participation

• Manufacturing

• Field test

• Contingency & retest



DEA Proposal Summary

• Development of a field ready 3 1/8” rotary steerable tool forTTRD applications

• Reservoir access using high build up rate RST

– High BUR 350/100ft

– Simple mechanical operation by pipe reciprocation

– Low capital cost

Proposer (s)

Duration Total cost Funding sought

15 months £540 k £190 k

19.0 concept - low cost rotary steerable systems

Documents