. Bulletin . in ki:m il MINI. C -Fishing jars <i - Combination socket \e\ | e - Mandrel substitute /-Sinker <f- Bulldog spear FISHING WITH CASING SPEARS. 35 to hold this stretch. A hold in the pipe is then taken with a tripspear, and jarring up is resumed as formerly described. The jacks are screwed against the spider in unison with the jarringwhenever it is believed that the pipe will stand increased that the pipe has started an upward movement areexpected. Certainty that movement has started is known only ifvibration is obtained. Unless ribration is obtained,continue
. Bulletin . in ki:m il MINI. C -Fishing jars <i - Combination socket \e\ | e - Mandrel substitute /-Sinker <f- Bulldog spear FISHING WITH CASING SPEARS. 35 to hold this stretch. A hold in the pipe is then taken with a tripspear, and jarring up is resumed as formerly described. The jacks are screwed against the spider in unison with the jarringwhenever it is believed that the pipe will stand increased that the pipe has started an upward movement areexpected. Certainty that movement has started is known only ifvibration is obtained. Unless ribration is obtained,continued jacking will part the casing, but if vibra-tion should be obtained, the jacks may be operatedmore freely as the vibration increases. Should the pipe part at a coupling above thespear, because of excessive power applied to thejacks, the pipe could be allowed to remain in thehole until the spear is pulled out. The pipe couldthen be withdrawn. If a bull-dog spear were used,the spear could not easily be withdrawn, and itmight b
Size: 1158px × 2159px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
