ES339124A1 - Shock absorbing and static load supporting drill string apparatus - Google Patents
Shock absorbing and static load supporting drill string apparatusInfo
- Publication number
- ES339124A1 ES339124A1 ES339124A ES339124A ES339124A1 ES 339124 A1 ES339124 A1 ES 339124A1 ES 339124 A ES339124 A ES 339124A ES 339124 A ES339124 A ES 339124A ES 339124 A1 ES339124 A1 ES 339124A1
- Authority
- ES
- Spain
- Prior art keywords
- chamber
- cavity
- absorber
- gas
- string
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
Abstract
A shock absorber for insertion into a drill string comprises a tubular member A adapted to be connected to one part of the string, a piston member B reciprocable in the member A and adapted to be connected to the other part of the string, a liquid pressure transmitting chamber E between the members, a gas cavity C in one of the members, and a movable separation element F in the cavity preventing liquid (a lubricant) from the chamber intermingling with the gas in the cavity. The cavity is shown as formed in the member A and the element is a flexible bag to which gas is supplied at the surface through a valve D. The other member (shown as the member B) has a cavity G housing a flexible bag F' to which drilling fluid in the bore-hole is freely admitted. As the string and absorber are lowered into the borehole the increasing pressure of the drilling fluid causes liquid from the part of the cavity G outside the bag F' to pass through a non-return valve 203 into the chamber E and compress the gas in the bag F, the arrangement preventing the absorber shortening under the increasing pressure of drilling fluid. When the bit engages the bottom of the borehole the piston member moves uwardly until the gas is compressed sufficiently to withstand the load applied to the bit. As the string and absorber are removed from the borehole the absorber lengthens and liquid in the chamber'E by-passes the piston seal 131 so that the gas pressure is reduced. The members have a splined connection 233 which transmit torque from the member A to the member B and the bit. In a modification the chamber G and bag F' are dispensed with, the drilling fluid entering the chamber E through a non return valve which may be opened by thrusting a tool down the bore of the string as it and the absorber are removed from a borehole. Alternatively the drilling fluid enters the chamber E through an aperture which is closed by the piston when the weight is taken by the bit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US537920A US3382936A (en) | 1966-05-28 | 1966-05-28 | Shock absorbing and static load supporting drill string apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES339124A1 true ES339124A1 (en) | 1968-07-01 |
Family
ID=24144668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES339124A Expired ES339124A1 (en) | 1966-05-28 | 1967-03-25 | Shock absorbing and static load supporting drill string apparatus |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US3382936A (en) |
| JP (1) | JPS5319522B1 (en) |
| AT (1) | AT266742B (en) |
| BE (1) | BE700837A (en) |
| BR (1) | BR6685582D0 (en) |
| CA (1) | CA826529A (en) |
| DE (1) | DE1287034B (en) |
| ES (1) | ES339124A1 (en) |
| FR (1) | FR1535477A (en) |
| GB (1) | GB1137326A (en) |
| NO (1) | NO119732B (en) |
| SE (1) | SE306709B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3660990A (en) * | 1970-02-27 | 1972-05-09 | Donald L Zerb | Vibration damper |
| US4055338A (en) * | 1976-02-17 | 1977-10-25 | Hughes Tool Company | Drill string shock absorbing apparatus |
| US4186569A (en) * | 1978-02-21 | 1980-02-05 | Christensen, Inc. | Dual spring drill string shock absorber |
| GB2039567B (en) * | 1979-01-16 | 1983-01-06 | Intorola Ltd | Drill spring for use in borehole drilling |
| US4394884A (en) * | 1980-07-28 | 1983-07-26 | Uvon Skipper | Shock sub |
| US4552230A (en) * | 1984-04-10 | 1985-11-12 | Anderson Edwin A | Drill string shock absorber |
| US4901806A (en) * | 1988-07-22 | 1990-02-20 | Drilex Systems, Inc. | Apparatus for controlled absorption of axial and torsional forces in a well string |
| US4862976A (en) * | 1988-11-22 | 1989-09-05 | Sandvik Rock Tools, Inc. | Spline drive for percussion drilling tool |
| US5577566A (en) * | 1995-08-09 | 1996-11-26 | Weatherford U.S., Inc. | Releasing tool |
| US5660241A (en) * | 1995-12-20 | 1997-08-26 | Dowell, A Division Of Schlumberger Technology Corporation | Pressure compensated weight on bit shock sub for a wellbore drilling tool |
| US6039118A (en) * | 1997-05-01 | 2000-03-21 | Weatherford/Lamb, Inc. | Wellbore tool movement control and method of controlling a wellbore tool |
| US6070670A (en) * | 1997-05-01 | 2000-06-06 | Weatherford/Lamb, Inc. | Movement control system for wellbore apparatus and method of controlling a wellbore tool |
| CA2663348C (en) * | 2009-04-15 | 2015-09-29 | Shawn J. Nielsen | Method of protecting a top drive drilling assembly and a top drive drilling assembly modified in accordance with this method |
| NO340896B1 (en) | 2015-01-29 | 2017-07-10 | Tomax As | Control device and method of using the same in a borehole |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT10099B (en) * | 1902-01-25 | 1902-12-10 | Leon Mikucki | Equipment on deep drilling tools for water flush drilling. |
| US2712435A (en) * | 1951-03-15 | 1955-07-05 | Walter T Allen | Shock absorber for rotary drills |
| US2721056A (en) * | 1952-02-14 | 1955-10-18 | Lynn W Storm | Hydraulic well jar |
| US3225566A (en) * | 1963-10-07 | 1965-12-28 | Grant Oil Tool Company | Drill string shock absorber |
| US3230740A (en) * | 1963-10-16 | 1966-01-25 | Fred K Fox | Drill string shock absorber and vibration dampener |
-
1966
- 1966-05-28 US US537920A patent/US3382936A/en not_active Expired - Lifetime
- 1966-11-28 CA CA826529A patent/CA826529A/en not_active Expired
- 1966-12-21 BR BR185582/66A patent/BR6685582D0/en unknown
-
1967
- 1967-03-09 GB GB11182/67A patent/GB1137326A/en not_active Expired
- 1967-03-21 DE DEH62195A patent/DE1287034B/en not_active Withdrawn
- 1967-03-24 FR FR100247A patent/FR1535477A/en not_active Expired
- 1967-03-25 ES ES339124A patent/ES339124A1/en not_active Expired
- 1967-03-27 JP JP6718703A patent/JPS5319522B1/ja active Pending
- 1967-03-28 SE SE4205/67A patent/SE306709B/xx unknown
- 1967-03-28 AT AT292967A patent/AT266742B/en active
- 1967-03-28 NO NO67167448A patent/NO119732B/no unknown
- 1967-07-03 BE BE700837D patent/BE700837A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AT266742B (en) | 1968-11-25 |
| DE1287034B (en) | 1969-01-16 |
| CA826529A (en) | 1969-11-04 |
| SE306709B (en) | 1968-12-09 |
| BE700837A (en) | 1968-01-03 |
| NO119732B (en) | 1970-06-29 |
| BR6685582D0 (en) | 1973-06-14 |
| JPS5319522B1 (en) | 1978-06-21 |
| GB1137326A (en) | 1968-12-18 |
| US3382936A (en) | 1968-05-14 |
| FR1535477A (en) | 1968-08-09 |
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