GB2515989A

GB2515989A - Fixed cutter hole opener

Info

Publication number: GB2515989A
Application number: GB1303758.5A
Authority: GB
Inventors: Neil Andrew Abercrombie Simpson
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-03-01
Filing date: 2013-03-01
Publication date: 2015-01-14
Also published as: GB201303758D0

Abstract

A method of constructing a fixed cutter hole opener device with cutter arms installed on a J slot mechanism, where the cutter arms can only be installed and uninstalled when the central wash tube is removed from the tool. The cutter arms may be installed on a J slot mechanism, which can be interpreted as a J-slot mechanism, pin and groove mechanism, indexing mechanism or pin and track mechanism.

Description

Fixed Cutter Hole opener (Fl-jO) Patent.FiUng

Background

Within the o and gas industry there is a frequent re4QiTement to open hole horn an in S dulled diameter to a largei diametar his operabon is ouz for a iancfy of reasons ranging from wet co Jro issues duectional steer rig and cnJa1 issues or sirip'y because the size ra"co of dnJ bits are unavallable 0.1 simply don't exist, These hole OCflFflQ operattans are nomSly caned out using stngt stage or multi stage toois base-c oi aoi c aed bathes wtt i oling eement toothed C ifers surilar to those used on roVei cone dii bis mou'ied n voIces or saddles vihb locate.!em at uifferent ro line diamees fit m the foci axis Tnee ools usually have ft re-adahie connect one top ard botm for conn0000r to the dill siring and a l iougP t'ore ki" the transrnlssi'.fl o' du hn mud from the uppe' diii irg tubulars to the ower drilling assemb1v he standard ange ku these tools ap generaUy B W to 2 Y4 3⁄4 to 1/ 7 1⁄2 to 25 23" to 36", arc 16 k 42" thoL4 t'e can be snaller and ca' vary in the range from the sizes given and hole opentog percentage-.

C In recent mes POC cuffing structures have been used in place of the roiling 0 elarnrt cutters bui cue mainly to cost the use cit this corrpaiotiveiy new cutting material has teen restricted to the s nailer sizes o tool or for C'J applicatio"'S where the formation type has justified the additiral cost These 0 PDC cutting etnicture a usually rnourEed on to hole ooanei backs n the ton' of interchangeab1e ølades I his is to allow \r ease of c"angiflg cuff nc stwC'ure' a the rig site hut also to chow to" the cc Je at the hole opener bodies in orcer to minimize operational costs.

The r.1an pwbiefll are in this approach tO have iriterchangSflt' cutter blades is the nsk of aOure of Inc attacI'fliant rnncnaflisnl "esuiting fl too aiiure and cutter rulade loss in the bore hoe wh ch in tui resuits in e"y cost'y fishing operations.

The invention described below relates to a retention mechanSm that will ensre a faikie can not occur arid thereby eiminating the "isk or uttei biade loss 0 tnt. role it also iiates to otner imnnvemetis with respect to stablatinn of trio rutt rig mecharism mpfok'eU cuter arm r gidrty which gieaty educe-s vib"atiofl causea n tie cuffing process [his vibration is one at the rnalor causes of cuter b1a5 loss in coflvrflt orial too,s Reduced cutter arm vlb,a*ion wil also contribute to polongir cutter life due to the fact that PDC is quite a brittle material and is easy damaged by high impact loadinw

A

Brief description of drawings

Fig 1. Shows a side view of the proposed assembled three biaded fixed cutter hole opener.

Fig Ia Shows an end viw of the proposed assembied three blacied fixed cutter hole opner.

g 2 Shows a 1⁄2eLtIaned sIde vtei of tho proposen assemb ad trtrr'c baded fixed cuiterhole opener.

Fig 2a. ShoWs a secfioped end view of the proposed assembled three bladed fixed cutter hole opener.

Fig 3. Shows a top view of. one interchangeable cutter arm installed with fixed FCC cutters.

Fig 4 Shows a side view of the same interchangeable cutter arm with two.

sets of retention J slots machined into the facing side.

Fig 5. Shows a bottom view of the iame interchangeable cutter arm showing the entry o the two sets "1 retem o J slots macblnc d Into thc other sIde of t the cutter arm.

Fig 6 Shows cross section detail o section A showing the relationship o 0 ethng nozzle wall toe PDC cutting structure on one of the interchangeable blade& Fig T89 and 10. show a side view of a three biacled fixed cutter hoie opener with an a ernativC method of onUS blade attachmenL Fig 11, lie, and 12 Show the yoke attachment mechanism of the alternathe method of cutter blade attachment Fig 13 13a and 14 Show the cutler blade forni for the alternative method of attachment-Fia 14. .S.ho*s a side.: the proposed assembled three bladed fixed cutter hoe opener Mt tJI gauge stahl zadon n the ooened ho'e seotlor dS well as in the pilot hcie section.

Fig 15 ShowS a sectioned side view of the proposed assembled three bladed fixed cuUe hole opere wth 1u11 gauge stahlnraflor In te upred ho1e seut on as well as in the pilot, hole section It also shows the J stats located on projections within the arm My'.

Description of the invention

Referring to Fig 1 and Fig 2 he pie-fe ad mbjthrient at the rQent coca ste a cyhndriral bath 1 with attachmeat means 2 an 3 at me awer and uPpa end with stab hsirg upset sec o'ic 4 and 5 sitLaiOO along the engti of the toey These upset sectiors havirg formed ci mUed siots passiny hrough them 9 andnX to permit e passago of di 11mg fluids ard cuttrgs debris Withr the upper SlOt 4 k torrnc o mdea an ooening or am hay into which is tited a cuter ant' b This openiry or arm bay 1:eing tormed or ri!leo to communicate wifi the cc tral throagh bore S which tsef is requre or he iansrnitabon of arPlrn fluid Wthin to central throjgh bore 6 s located a flow tube 9 wth attachneit means 10 at oe end ana seals Ii and 12 at either eno The use of thi wasn tube bang to provide a sealea aat'mkay for to dnPirg finds across the comrnjnr'atng openinq or ant' bays F and ft prnide a pos bye ocked out positians for the cutter -arms 5.

From the central through bare B fluid commurlioatien passageS 13 direct.

dulling th d to nonles 14 wh oh in turn threct a cnntroUec fipw of dulling fluid onto be well bo'e 15 a the cuttrq s ucture 16 of the utte aims A This &rected di ng fluid tang for coor'g and cleaning purposes of the cubing structure i a CHard faar.g materials 17 are apphdd to the upset sections 4 and S to prevent ahrasre wear and to orovide cthhi sttofl with n the pilot ho a being opened O andtte bore wall 15.

C\J Referring to Figs 344a and fig 5 Wh oh shows r 34 aid fig S a top view ade view and batofl ve of the cuPer arm 6 In 4 and 5 were are nachined a nLrnher otj acts 2 which in fi 5 an be seen to be mach ned to a predetenined dep?' 21a Theo sos enae with urep0nd ng ucset ucitions loc&ed nsidc the openings or am' bays 7 on treir inside faces trot shovn) such tat the custer arms 8 cr be iriata9ed into those formed c milled operikuqe or art' bays 7 in a bayoflet type las' on with the Lpset pcrtione engagirg n the machined i is 21 where rstalation reqilles me cutter aims 7 to sild intc> tre arm uays 7 pushing them nto the cent al bore 6 with the flow tuce 9 removed sliding them faw?r or upwanis tc abut the tap face of the arm bay I and thor puihng tram utwards to clear the ccnVa bore n No irstalling the tow tube 9 nas the ttect of sealing of the ai T bays arc prevanting the cuttei am's B moving back into the cenft& bore into their assembly or ds:assembly position.

In this configuration triO only way th. cutter arnie B can be removed from the am basis 7 in the bod is by he removal ot the flow tube 9 when can univ be atoessed oy me dsconnect on of he top sut 15 as thib siLation car not take.place downhole the armS cannot be loslin bore.