Cdng trinh Khoa hgc NGHIEN CUtJ DE XUAT CONG THlTC TINH TOAN MOMEN CAN TAC DUNG LEN c A u KHOAN CUA MAY KHOAN COC NHOI LAP TREN CAN TRUC BANH XICH PGS TS NGUYEN VAN V|NH PGS TS VCITHELOC ThS DOAN VAN TU Bg m6n Mdy x&y dirng - Xep (Id Tnrdng Dgi hpc Giao thdng Vtin liu Tom tdt: Bdi bdo trinh bdy nhirng kit qua thu duac nghien cihi, de xudt cong thuc linh todn momen cdn tdc dung lin gdu khoan ciia mdy khoan cpc nhdi Idp tren cdn true hdnh xich Summary: The report presents research results on the proposing a formula lo calculate drag torque of rotary drill when this equipment working I D A T VAN D E Hi?n d nudc ta, cdng tac thi cdng nen mdng cdng trinh, dac biet li cic cdng trinh giao thdng, ngudi ta chii yeu sii dyng cac loai may khoan cpc nhdi de khoan tao cpc Vdi nhu cau sii dung may Idn va gii cac loai miy nhap la kha cao nen viec ehe tao eac loai may la rat can thiet Mpt nhiing khd khan tinh toan, thiet ke la cdng thirc de tinh mdmen cin ciia gau cdn thieu cac tai lieu chuyen nginh de phuc vu qua trinh che tao bd cdng tac ciia may khoan cpc nhdi lap tren can tryc binh xich d nudc Vi vay, de tai khoa hpc va cdng nghe d p Bp MS: B2011-04-01 da nghien cuu, dh xuit cdng thiic tinh toan mdmen can tac dung len giu va npi dung chi tiet dupc trinh biy d phan tiep theo bii bio II NOI DUNG NGHIEN CL U Gidi thieu may khoan cpc nhoi lap tren can true IHI DCH800 Chiing tdi lira chpn mdt loai may khoan cpc nhoi phd bi8n la may khoan cpc nhoi IHI DCH800 dl nghien ciiu Hinh I th6 hi?n cau tao tdng th6 ciia miy Bp cdng tac eiia nd gdm: Gia khoan, kelly, mam khoan, khdp ndi kelly, mam khoan vi cac xi lanh ChiSu sau khoan H = 85 m, dudng kinh gau khoan D = m, mdmen khoan M = 15 Tm Nguyen Iy boat ddng ciia may nhu sau: Ngudn ddng lire chinh tir ddng ca diesel se din dpng cho he bcmi thuy luc lam viec Tir day, dau thiiy luc cd ap sudt cao dupc e^p cho cac ddng CO vi xi lanh thiiy Iuc ciia may Trong qua trinh khoan, ngudi lai miy digu khiSn cac xi lanh (5, 6) h? bp cdng tac khoan, dinh tam gau (1) vao vj tri khoan, liic gau quay, ddt dugc cit va tfch vao g4u Khi da dii lugng dit, ngudi lai may dieu khi8n tdi ciia he Kelly (3) nang giu 20 Tap chi KHOA HOC GIAO THONG VAN TAI S6 43 - 09/2013 Cdng trinh Khoa hoc Ien, quay may vi dat ngoii Qua trinh lam viec dupc lap lai cho den khoan tdi dp sau thiet ke Trong qui trinh khoan cd the sis dung dung djch vira set hoic dng vach de dn dinh Id khoan Cau tao ciia gau khoan the hien tren hinh 2 Tinh momen can tie dung len gau Chiing tdi tinh mdmen cin tic dung len gau vdi gau cd dudng kinh ^ = 1580 mm vi dudng kinh md rpng (j) = 1700 mm (ke ea ludi eat md rdng) Day la loai gau dang thi cdng tai cau Cii Ldn - Kien Giang va eung la loai gau ma nhdm tic gii da lira chpn tinh toan thiet ke cac bp phan khac Gau dugc dimg de thi cdng cic loai dat cip III IV V (dugc phan loai theo bang 1-6, TL[1]), vdi cic luc cin rieng: K = 1,3 (kG/em"); 2,5 (kG/cm"): 3,2 (kG/cm") Dd la cac loai dit gdm: A set chat, set am hoac rdi than da mem, a set nang pha sdi, set bao hda lan di vun, than da Cling vira Sau phan tich dieu kien lim viec ciia gau, nhdm tic gii de xuit cdng thiic tinh mdmen cin tic dung Ien gau qui trinh lam viec nhu sau: Y,M^My+M^_+M.+M^+M^+M^ (1) Trong dd: V M - Tdng mdmen cin len giu; Ml - Md men can thuin tuy: Md men la he ludi cat d day gau sinh ra; Mi = const (neu tang dat ddng nhat); Ml - Md men can qua trinh tich dat day gau M2 = - max ; M.1 - Md men cin giu khoan quay dung djch bim, set M_i = const; Mi - Md men can cic ludi cat ben gau khoan (ludi cat md rdng 16 khoan); M4 = const; Ms - Md men can sinh ma sit eiia diy gau va Idp dat d day hd khoan ; M5 = - max ; M(, - Md men can ma sit bi quay mam khoan M(, = -^ max ; Hiidi I Cdu tgo Mdy khoan coc nhoi IHI DCH800 - Gdu khoan - Mdm khoam; - Thanh Kelly - Gid khoan: 6- Xi lanh diiu chinh gid khoan: - Cdn true ca 'ia Sa dd tinh cic mdmen cin thinh phan tac dung len gau nhu hinh Tap chi KHOA H O C GIAO THONG VAN TAI S6 43 - 09/2013 21 Cdng trinh Khoa hgc 2.1 Tinh cac momen can phan tac dung len gau 2.1.1 Tntdng hap Khi bit diu dao xong giu diu tien, bieu thiic (1) khdng cd phin cin M3 a) Tinh momen cdn cdt ddt M, Dua theo cdng thdc cua N.G.Dombrovski - TL [I], sau bien ddi, chiing tdi de xuit cdng thiic xic dinh md men can dao thuin tiiy cddang nhusau: M, = R".K.C (2) Trong do: K - He sd cin dao thuin tiiy, K = 1,3 -^ 2,5 (kG/cm^); C - Chieu diy phoi dat tdi da vdi a = 30° thi C = 15 cm; R - Ban kinh gau •r-'-iF ~^' b) Tinh momen cdn tich ddt M} Tinh cdng nang khoi dit gau day bang phuong phap nang lugng ta cd: ' (3) ^ Trong dd: H - Chieu cao giu; p - Ty trpng dit c) Tinh momen cdn khoet day 16 M4 De tinh M4 chiing tdi sir dung cdng thirc ciia N.G.Dombrovski ap dung cho trudng hpp nhu sau: Luc cit Po,: pQi =2.K.B.C Hinh Cdc thdnh phdn luc vd mo men Mdmen can khoet diy Id: tdc dung ten gdu M, - R.Pn, - 2.K.C.R (4) Trong do: C - Dp day phoi dit md rpng, C = D,-D„ , mdi phan ludi cit md rdng la R = Dy - Dudng kinh gau khoan; D| - Dudng kinh Id khoan; B - Be rpng phan ludi md rdng; R - Canh tay ddn ciia mdi ludi cit, R d) Tinh mdmen cdn ma sal ddy gdu Mj Luc ty day gau xudng hd khoan cd the xiy trudng hpp: - Trudng hgp 1: Cip treo long 22 Tap chi KHOA HOC GIAO THONG VAN TAI S6 43 - 09/2013 Cdng trinh Khoa hgc Luc ty day gau trudng hgp chi treo kelly tacd:F3 = G^ +G^ +Gf Vay mdmen cin ma sat diy gau: Mj = R-F^f (5) Trong do: Go - Trgng lupng giu; Gd - Trpng lupng dit; GK - Trpng lupng cic Kelly ; R - Ban kinh gau khoan; f- He sd ma sit - Trudng hpp 2: Cap treo du thing lire PQT Theo cdng thiic tinh Iuc can dao thing gdc vdi quy dao dao ciia Dombrovski thi lire ty diy giu tnrdng hpp la: F|j = PQ^ = ii/.P(,| Vay mdmen can ma sat day gau: Mj = R.F^.f (5') Trong do: y - He so ty le thuc nghiem giiia Poi va PQI: \\I = 0,3; Poi - Luc can dio tiep tuyin ldn nhit, /J,, = —^^^SL ; Trong trudng hgp nay, theo tinh toin thi trudng hpp I cap treo long thi mdmen cin se ldn han e) Tinh mo men cdn ma sdt bt Mf, Theo cdng thiic 5-74, TL[3], mdmen can quay cua he Kelly mang gau khoan day dit la: M^ = H.^L.-^ + H.^i.^- + V ^ ^ (6) Trong dd: H - Luc ngang tic dung len d bi; V - Luc thing dung tac dung Ien d bi Idn nhit ldn nhit (luc V nhd nhit Gd = 0), gdm: V = GQ + Gj, + G^ + Gj Vdi: GG - Trpng lupng giu (kG); GK - Trpng lupng cic Kelly (kG)GT - Trpng lugng true chinh va vanh rang (kG); Gd - Trpng lupng dat gau (kG) d| = d2=dv-Dudng kinh trung binh ciia vanh d; | i - He sd ma sit d 2.1.2 Tru-dng hgp 2: Gin kk thiic qua trinh dio (dp sau H « 85 m), dd cong thirc (1) cd diy du thinh phin can Mdmen can khuay bim Mi duac xic dinh theo Cdng thii'c Newton: P = —.v F g Trong dd: Y - Ty trpng biin bentonit; v - Tdc dp tiep tuySn vat cin khuiy?t const; F - Dien Tap chi KHOA HOC GIAO THONG VAN TAI So 43 - 09/2013 23 Cdng trinh Khoa hgc tich cin khuay; g - Gia tdc trpng trudng Luc can khuiy bim ti6p tuy§n vdi vd giu khoan cd th6 khdng xet vi qua nhd vdi ly do: Bun khoan cd tinh nhdt, vd gau khoan nhin tron Luc can khuay phu thudc nhieu vao v mi v 7^ const nen phii vi phan timg phin dien tich chiu khuay F dan den vi phan ci luc can khuay theo R gau khoan Sau do, ti'ch phan lai de khai trien Vi phan dien tich cin khuiy: dF = C.dx X - khoang each tir tim quay, - dF C - Chigu rdng quy k6t ban khuiy theo thiet ke giu khoan C = 30 (cm) x (canh khuiy) Tdc dp tiep tuyen diem khuay dang xet: Viy: Vj^ = (O.K dP = ^.cD-.x-.C.dx t> P = f dP = g i -.Cor.— g Lyc P dupc dat tren hin khuiy each tam quay giu doan Xn va lay tich phin eiia chiing se la: R Mj - Md men can khuiy biin: Mj ^ \^^^ ~ ^0^ 3 ^—R ->a)Xn = Vn =—toR ' " " Qua thay the ta dupc: M, - ^.C.o)' f xMx = ^.C.co' — g ;^ g Suy ra: 2.2 Tdng hop ket qua momen can quay gau Vdi cac sd lieu cu the, ddi vdi giu khoan cd kich thudc nhu da trinh biy d phan tren nhdm tac gii di tinh toin va cd ket qua nhu sau: * Vdi k = 2,5 kG/cm^ ta cd bang ket qua: CAc trird'ng htfp Tnrimg hop 1: (VcSricipdItlll) Tru6ng hop 2: (VAi cip dit IV) Truimg hgp 3: (V6i cap dit V) 24 M, (Tm) M,(Tm) MjCTm) M, (Tm) Ms (Tm) M (Tm) XM(Tm) 1,2168 0,3719 0,000396 0,1326 1.781 0.0604 3.5633 1,7787 0.3719 0,000396 0,1938 1,781 0.0604 4,1862 2,34 0,3719 0,000396 0,255 1,781 0.0604 4,8087 Tap chi KHOA HOC GIAO THONG VAN TAI S6 43 - 09/2013 Cdng trinh Khoa hgc * Vcri k = 3,2 kG/cm^ ta co bang ket qua: Cac t r u i n g hg'p M, (Tm) M; (Tm) Mi(Tm) M4 (Tm) Ms (Tm) M, (Tm) IM(Tm) 1,2168 0,3719 0,000396 0,1326 1,583 0,0604 3,3987 2,106 0,3719 0,000396 0,2295 1,583 0,0604 4,3848 2,9957 0,3719 0.000396 0,3264 1,583 0,0604 5,3714 Truimg hgp 1: (Voi cip dit 111) Truong hgp 2: (Vcri cip dit IV) Trif&ng hgp 3; (Voi cip dit V) HL KET LUAN Viec xay dung cong thuc tinh mdmen can tic dung len giu khoan d6 phuc vu qua trinh tinh toan, thiet ke, che tao nudc bp cdng tic cua thiet bj la rat cin thiet Tir ket qua nghien ciiu nghien ciiu thu dupc nhdm tac gia cd ket luan nhu sau: - Gii tri mdmen cin giu khoan quay dung djch biin, set (M^ = 0,000396) qua nhd nen ed thi bd qua Cdng thire Newton su dung thuc te can cd them he so di6u ehinh p Cu the, theo Borodanhep: P = p.—.v^.F He sd p cang ldn neu v cing nhd, vdi n = 10 v/ph din 80 g v/ph thi p = 12 d8n Tuy nhien, nSu ta liy p vi gia thiet p = 10 thi tri sd M3 vira tinh tren cung khdng cd y nghTa gi dang ke - Khi tinh mdmen can ma sat day gau M5 thi trudng hgp cap treo ldng cd gia tri cin Idn hem so vdi trudng hpp cap treo dii thang luc can dao phap tuyen PQI - Cic gia trj tdng mdmen cin tinh toan Iy thuyet vdi cic cap dat khac so vdi cac gii tri thuc nghiem dat tren may khoan IHIDCH800 cd kit qua tuang ddi phii hgp da dugc trinh biy bai bao [4] - Cdng thiic dupc de xuit cd the lam co sd ban diu cho viec nghien ciru ve luc can ciia dat qua trinh thi cdng ciia may khoan cpc nhdi loai khac Tlii lieu tham khao [1] VuThfiLoc, Maylimdit, NXB Giao thSng Van tai, nam 1998 [2] Nguyin Binh, May thi cong chuyen diing, NXB Giao thong Van lai, nam 2005 [3] Nguyin Van Hgp May true - van chuyln, NXB Giao thong Van lai nam 1998 [4] PGS TS Nguyen Van Vmh, ThS Nguyin Van Thuyen "Nghien ciru thuc nghiem xac djnh cac thdng s6 CO bin ciia bo c6ng tic khoan cpc nhoi lip irin cin true banh xich" Tap chi GTVT, so 3/2013 • Phan bign: PGS TS Thai Ha Phi Tap ehi KHOA HOC GIAO T H N G VAN TAI S6 43 - 09/2013 25 ... can ma sit bi quay mam khoan M(, = -^ max ; Hiidi I Cdu tgo Mdy khoan coc nhoi IHI DCH800 - Gdu khoan - Mdm khoam; - Thanh Kelly - Gid khoan: 6- Xi lanh diiu chinh gid khoan: - Cdn true ca ''ia... giu khoan quay dung djch bim, set M_i = const; Mi - Md men can cic ludi cat ben gau khoan (ludi cat md rdng 16 khoan) ; M4 = const; Ms - Md men can sinh ma sit eiia diy gau va Idp dat d day hd khoan. .. lam viec dupc lap lai cho den khoan tdi dp sau thiet ke Trong qui trinh khoan cd the sis dung dung djch vira set hoic dng vach de dn dinh Id khoan Cau tao ciia gau khoan the hien tren hinh 2 Tinh