割大繩計(jì)算法

1、割大繩計(jì)算法計(jì)算方法已知條件：鉆桿尺寸127mm （29kg/m）；鉆鋌長(zhǎng)度：163m（外徑165mmX內(nèi)徑71mm）；游車總重（包括游車、大鉤、吊卡）TBA： 11800daN（參見(jiàn)表1）；表1游車總重額定提升能力（噸）游車總重（daN）10028001503300250570035074005001180065015100750205001.起下鉆：例 在2400米時(shí)起鉆換鉆頭，計(jì)算如下:（1）確定鉆鋌量，見(jiàn)表2；表2鉆鋌重量（適用于127mm 29.0kg/m鉆桿）鉆鋌尺寸外徑（mm） X內(nèi)徑（mm）鉆鋌重量（daN/m）105X51120X57146X71146X57152X71152

2、X57159X71159X57165X71165X57171X71171X57178X71184X71197X76197X71203 X 76203X71229 X 76對(duì)165X71mm鉆鋌，其重量是叫乘以163米，163X=8313 daN(2) 確定總重量：鉆鋌重量與游車重量之和T=8313+11800=20113;(3) 確定每次起下鉆大繩所做的功W (單位：10$焦耳)：由附表讀出在T=20000daN時(shí)，對(duì)127mm鉆桿完成一次起下鉆所做的功W是3300：(4) 確定割大繩的長(zhǎng)度L (m)： W除以893即為應(yīng)割去大繩的長(zhǎng)度,L=33OO 4-893=3.69m.或由表3査出;表3

3、割大繩長(zhǎng)度大繩所做的功W割大繩的長(zhǎng)度L大繩所做的功W割大繩的長(zhǎng)度L(1()6焦耳)(m)(106焦耳)(m)2000500025005500300060003500650040007000450075002.鉆進(jìn)：鉆進(jìn)所做的功是在鉆進(jìn)起始位置起下鉆大繩所做功差值的3倍。例:自2400米鉆進(jìn)至2700米，有：(1) 總重量T=20113,同上；(2) 確定2700米起下鉆大繩所做功，山表4讀出W2=3947;(3) 確定2400米起下鉆大繩所做功W 1=3300(同1);(4) 鉆進(jìn)所做功 W=3X (W2-W1)=3X (3947-3300)=1941;(5) 確定割大繩的長(zhǎng)度 L (m)：

4、L= 19414-893=2.17m.3. 下套管：下套管時(shí)大繩所做功等于套管與鉆桿重量相同時(shí)，大繩對(duì)鉆桿做功 的一半。例：下273mm(60.3kg/m)套管至500米。(1) 確定套管與鉆桿重量比值R:R=(2) 確定起下鉆時(shí)大繩對(duì)鉆桿所做功：讀附表,Wl=301(下套管時(shí)，無(wú)鉆 鋌，總重量T二游車重量11800daN).(3) 由比值R乘以W1得W2是大繩對(duì)鉆桿起下鉆所做功:W2=X 301=626;(4) 下套管時(shí)大繩所做功W:W=W2/2=626/2=313(因?yàn)橄绿坠軙r(shí)套管只入 井，而不起出)；(5) 應(yīng)割大繩長(zhǎng)度 L(m):L=313/893=0.35mo4. 甩鉆具：甩鉆具時(shí)大

5、繩所做功等于起下鉆時(shí)大繩所做功的一半，這里不再贅 述。二. 計(jì)算實(shí)例表4是某井的實(shí)際應(yīng)用。該井表層鉆至477米，鉆具組合為：鉆頭+ 3 根8”鉆鋌+15根6仏”鉆鋌+5”鉆桿。二開(kāi)后下入PDC鉆至2450米，起鉆換 鉆頭，鉆至設(shè)計(jì)井深2700米，短起下鉆，然后起鉆電測(cè)。三. 兒點(diǎn)說(shuō)明在割大繩的作業(yè)中，需嚴(yán)格按照上述方法計(jì)算。在滾筒容量允許的情下, 可以只松死繩端滑大繩兩次，笫三次時(shí)卸開(kāi)活繩頭割去磨損大繩。在利用上 述方法的同時(shí)，還要經(jīng)常檢查大繩有無(wú)斷絲、打扭、磨損嚴(yán)重等情況，以做 到防患于未然。公司：絞車：鋼絲繩廠家：割去1米做功：893 MJ/M隊(duì)長(zhǎng)：絞車滾筒直徑：尺寸和長(zhǎng)度：井號(hào)：井架高度

6、：股數(shù)：天車滑輪直徑：鉆桿尺寸：127mm游車滑輪直徑：重量：29kg/m游車重量：11800 daN日 期起下鉆 序號(hào)井深m鉆鋌鉆鋌 重量 daN總重量 daN起下鉆 做功MJ總功自上次割 后做累功應(yīng)割大繩 長(zhǎng)度備注尺寸mm重量 daN/m長(zhǎng)度m1477203165271362203617420177458137418321832鉆至表層井深 起鉆22450165163740019200333086161194613778PDC鉆進(jìn) 起鉆換鉆頭3270016516374001920039471851579819576鉆至設(shè)計(jì)井深2700m 短起下鉆至套管鞋427001651637400192

7、0039470394723523起鉆四. 附表根據(jù)總重量T及井深可以查出大繩所做的功。井深m總蟲(chóng)址T (daN)40006000SOOO100001200011000160001S000200002200024000260002S000300002001358719010612113715316918120021523124730072951191121661S921323626028330733135137S40010513716S20023126229432535738S4194514825135001441S32232623013103S0419458497536576615651600

8、18S2352823293764234705175656126597067538007002372923164014565115666216767317S6811S96951800290353416479541601667730793S5591S9S1101311069003194194905616317027738139149SI105511261196126710001124915696IS726805SS39621011111911971275135411321100481567654710S2691299910S5117212581344113015171603120055461974

9、3S37931102511191213130S1102149615901681177S130063373583793910111113124513171449155116531755185719591400716826936101611561266137514S5159517051S151925203121111500S059221010115812751393151116291747186119S22099221723351600S981024111912751400152616511777190320282153227924012530170099611302263139715301663

10、179719302061219723302463259727301S001100124113S2152316651S06191720SS2203237125122653279129351900120S1357150616551801195321022251240025192699281S2997311620001321117S163517921919210622632419257627332S90301732013361210011391604176919342098226324282593275S292230S73252311635S1220015621735190S20S022532125

11、259S27712944311632SS316136343806230016901871205122322412259327732951313433143495367538561036240018242012220023SS25772765295331123330351S37063S95408342712500196221582354255027162942313S333435313727392341194315451126002104230S2512271629203124332S3532373639104144431S4552475627002252246126762SS831003312

12、352337353917415943714582479450062S0021052625284530643284350137233943416343824602482250115261290025632791301S32613173370139281156438446114S3S50665293552130002726296131973132366739034138437346094844508053155550578631002S94213733S036233867411043534596481050S3532655695812605532003067331S35693S2040714322

13、457348245075532655775828607963303300321435033762402142804539479S5056531555745S3360926351661034003427369439604227449147615027529455615S276094636166286S913500361438S94161113S4713498752625537581260S663606635690971S136003S07409043724654493752195502578460676319663169147196717937004005429545S5487551665156

14、57166037632766176907719S7488777S380042074505180351025400569S5996629465926S90718874867785S0S339004415472150275333563S5944625065566S62716874747780S0S6S3924000462749115225556S58S2619665106824713S74517765S07983938707<11004844516654885809613161536774709674 IS7739S061S3S3870190264200506753965726605563S56714701473737703S032S326S6919021935043005294563159696306661469S1731S76567993S330S66S9005931296S04400552658726217656269077252759S7913S2SSS633S97S932496691001145005761611761706S2371767