GB816845A - Well drilling apparatus and method - Google Patents
Well drilling apparatus and methodInfo
- Publication number
- GB816845A GB816845A GB36069/56A GB3606956A GB816845A GB 816845 A GB816845 A GB 816845A GB 36069/56 A GB36069/56 A GB 36069/56A GB 3606956 A GB3606956 A GB 3606956A GB 816845 A GB816845 A GB 816845A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cable
- tension
- pressure
- drill
- amplifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005553 drilling Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 title 1
- 238000009499 grossing Methods 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/084—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with flexible drawing means, e.g. cables
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
816,845. Automatic cable-tension control systems. MUD CONTROL LABORATORIES Inc. Nov. 26, 1956 [May 14, 1956], No. 36069/56. Class 38 (4). [Also in Groups XXI and XXXVIII] The tension in a cable supporting a well-drilling tool is reduced when it exceeds a pre-determined value in order to maintain the pressure of the tool on the well bottom, by sensing the tension as by passing the cable round a pressure-sensitive ring and releasing the cable reel for a predetermined time when the cable tension exceeds a predetermined value. As shown (Fig. 5), the distortion of the ring moves the slider 76 of a potentiometer 78 in a pre-set bridge circuit, the take-off voltage being applied through smoothing circuits to a D.C. amplifier 194 indicating on meter 196 the deviation in tension from the preset value, and to amplifier 236 and thence to pentode 240 which increase in drill pressure cuts off to operate alarm horn 268 and pneumatic valve 270 which prevents further paying-out of cable. The output of amplifier 236 is also fed to pentode 242 which increase in cable tension causes to conduct, closing switches 280 and 306, and thus bringing into operation multivibrator 282, which operates to close switch 308 and open air valve 318 for a period determined by the setting of resistor 300. The opening of this valve operates a pneumatic cylinder 84 which releases the brake on the cable reel, allowing cable to unwind and reduce cable tension; if cable tension is not reduced sufficiently in this period to open switches 280 and 306 the multivibrator will continue to operate and release the reel for a further period or periods. Potentiometer 168 is pre-set to a position representing the desired tool pressure, and is re-adjusted as further lengths of drill pipe are added since the desired cable tension depends on the total weight of drill and drill pipe less the desired drill pressure.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US816845XA | 1956-05-14 | 1956-05-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB816845A true GB816845A (en) | 1959-07-22 |
Family
ID=22165724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB36069/56A Expired GB816845A (en) | 1956-05-14 | 1956-11-26 | Well drilling apparatus and method |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB816845A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9206658B1 (en) | 2015-07-17 | 2015-12-08 | PATCO Machine & Fab., Inc. | Controlling cable spooling systems |
US10233705B2 (en) | 2015-07-17 | 2019-03-19 | PATCO Machine & Fab., Inc. | Reel control systems with data logging |
US11174122B2 (en) | 2018-04-23 | 2021-11-16 | PATCO Machine & Fab., Inc. | Reel with power advance repositionable level wind |
US11434103B2 (en) | 2015-07-17 | 2022-09-06 | PATCO Machine & Fab., Inc. | Reel assemblies with automated control systems |
-
1956
- 1956-11-26 GB GB36069/56A patent/GB816845A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9206658B1 (en) | 2015-07-17 | 2015-12-08 | PATCO Machine & Fab., Inc. | Controlling cable spooling systems |
US9810032B2 (en) | 2015-07-17 | 2017-11-07 | PATCO Machine & Fab., Inc. | Cable spools with sheaves |
US10233705B2 (en) | 2015-07-17 | 2019-03-19 | PATCO Machine & Fab., Inc. | Reel control systems with data logging |
US10745984B2 (en) | 2015-07-17 | 2020-08-18 | PATCO Machine & Fab., Inc. | Reel assemblies with electronic control systems and sheaves |
US11434103B2 (en) | 2015-07-17 | 2022-09-06 | PATCO Machine & Fab., Inc. | Reel assemblies with automated control systems |
US11174122B2 (en) | 2018-04-23 | 2021-11-16 | PATCO Machine & Fab., Inc. | Reel with power advance repositionable level wind |
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