CA1079261A - Drilling stabilizer including mechanical interlock and disengagement device - Google Patents
Drilling stabilizer including mechanical interlock and disengagement deviceInfo
- Publication number
- CA1079261A CA1079261A CA312,523A CA312523A CA1079261A CA 1079261 A CA1079261 A CA 1079261A CA 312523 A CA312523 A CA 312523A CA 1079261 A CA1079261 A CA 1079261A
- Authority
- CA
- Canada
- Prior art keywords
- end cap
- ring
- split ring
- main sleeve
- rib
- 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
- 239000003381 stabilizer Substances 0.000 title claims abstract description 46
- 238000005553 drilling Methods 0.000 title claims description 34
- 238000004891 communication Methods 0.000 claims description 3
- 230000006854 communication Effects 0.000 claims description 3
- 230000006872 improvement Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 241000282326 Felis catus Species 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
- F16D1/09—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces
- F16D1/093—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces using one or more elastic segmented conical rings forming at least one of the conical surfaces, the rings being expanded or contracted to effect clamping
- F16D1/094—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces using one or more elastic segmented conical rings forming at least one of the conical surfaces, the rings being expanded or contracted to effect clamping using one or more pairs of elastic or segmented rings with mutually mating conical surfaces, one of the mating rings being contracted and the other being expanded
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Drilling Tools (AREA)
- Clamps And Clips (AREA)
Abstract
Abstract A rigid stabilizer sleeve having outwardly extending ribs is slideably received over a drill collar. A pair of internal clamping rings are slideably received through each end of the rigid main sleeve. As a threaded end cap is threaded into the rigid main sleeve, the end cap forces one ring of the pair against the other thereby producing a clamping effect whereby the stabilizer can be clamped at any desired position on the drill collar. An outer ring of the pair of rings has a groove and a rib disposed on its interior cylindrical surface;
the portion of the end cap received by the outer ring has a rib and a groove disposed upon its outer cylindrical surface.
As the end cap receives the outer ring, the rib and the groove of the end cap interlock with the groove and the rib respectively of the outer ring whereby when the end cap is threadedly removed from the rigid main sleeve, the outer ring follows the end cap and is disengaged from the inner ring, thereby unclamping the pair of rings from the drill collar.
the portion of the end cap received by the outer ring has a rib and a groove disposed upon its outer cylindrical surface.
As the end cap receives the outer ring, the rib and the groove of the end cap interlock with the groove and the rib respectively of the outer ring whereby when the end cap is threadedly removed from the rigid main sleeve, the outer ring follows the end cap and is disengaged from the inner ring, thereby unclamping the pair of rings from the drill collar.
Description
'79261 DRILLING STABILIZER INCLUDING
MECHANICAL INTERLOCK AND DISENGAGEMENT DEVIGE
1 Background of the Invention Oil field drilling operations utilizing a rotary drill string and having a section or sections of drill collar immediately above the drill bit require the application of a drilling stabilizer to the drill collar section or sections in order to minimize the seizure within the drill bore of the drill collar as well as to stabilize the drill string during drilling operations.
It is desired that a drilling stabilizer be quickly connected or disconnected to the drill collar, and that a minimum of manual operations be involved during the connecting or disconnect-ing of the stabilizer. It is further desirable to employ a drilling stabilizer which can be affixed to the collar section in such a man-ner that each stabilizer can be affixed at any desired interval from the preceding stabilizer. Those familiar with oil field opera-tions will recognize that the various combinations and spacings of drilling stabilizers are often determinative in obtaining a desired drilling result. It is also advantageous to utilize a drill-i ing stabilizer which is durable throughout a particular drilling operation and which is readily adaptable to any number of dissimilar drill collars utilized in oil field operations around the world.One such drilling stabilizer which has frequently been used is described and claimed in U.S. Patent No. 3,916,998 issued November ~ 4, 1975 to Samuel L. Bass, Jr., et al, entitled Drilling Stabilizer j and Method (hereinafter referred to as the '998 patent).
The drilling stabilizer described in the '998 patent comprises fundamentally a rigid main sleeve having an axial passage-way extending therethrough and a rib midway of the passageway against each side which a pair of slideably received rings abut. An end cap is threadedly engaged into each end of the rigid main sleeve in such a manner that as the end cap is threaded into the sleeve the inner ring of a pair of rings is forcefully urged into a clamping engagement with the outer surface of the drill collar.
'' ~1_ ~ ,' .. . .. . . . .
~079Z61 1 Likewise, the outer ring is forced against the inner surface of the main sleeve. Consequently, the device in the '998 patent can be selectively applied to any location on a drilling collar. More-over, since only the interior surface of the inner split ring con-tacts the drill collar, flexibility within the drill collar is not sacrificed by the application of numerous drilling stabilizers.
A shortcoming of the device in the '998 patent, however, has been that once the drilling stabilizer is successfully clamped onto the drill collar, it is frequently difficult to disengage and remove the stabilizer from the collar. Those familiar with drilling operations appreciate that mere removal of the end cap from the rigid main sleeve often does not disengage the outer split ring from the inner split ring on either or both pairs of rings. Con-sequently, although the end cap has been threadedly disengaged from the rigid main sleeve, the corresponding pair of split rings still exerts a force or forces clamping the stabilizer to the collar. A common practice for disengaging the stabilizer from the collar has been to strike the stabilizer forcefully with any suit-able device such as a large hammer. Such an operation clearly requires additional manual effort, tools, time and is also destructive of the stabilizer itself.
The present invention is directed toward the elimination of the shortcomings of a drilling stabilizer similar to the one shown and described in the '998 patent. The present invention described and claimed hereinafter employs an annular ring and an annular groove on the interior surface of the outer split ring and an annular groove and annular rib on the exterior surface of the end cap whereby the rib of the outer ring is substantially disposed within the groove of the end cap and the rib of the end cap is substantially disposed within the groove of the outer ring. The outer ring is preferably urged into engagement with the end clamp before threading the end cap into the main sleeve. The interaction D79z61 between the groove and the rib on the ring with the rib and groove respectively of the end cap produces a locking action in the axial direction. The result of the axial interlock configuration is that the outer split ring necessarily follows the end cap as the end cap is threadedly disengaged from the rigid main sleeve, thereby unclamping the pair of rings from the sleeve and drill collar. Those familiar with drilling operations will realize that as the second end cap is threadedly disengaged from the drilling stabilizer that the stabilizer itself can be axially moved along the drill collar for ; repositioning, engagement and disengagement with the collar.
According to the invention there is provided an improved drilling stabilizer having a substantially cylindrical rigid main sleeve, an axial passageway extending the entire length of the rigid main sleeve and including an inwardly extending fixed abutment means medially of the passageway.
¦ The innermost extent of the abutment means defines an 3 opening of sufficient size to permit the sleeve to be slideably received over a drill collar. Extending radially outwardly , 20 of the rigid main sleeve is a flange. A clamping means ¦ positioned internally of the rigid main sleeve adjacent the , fixed abutment means includes a first and second pair of , overlying inner and outer split rings each having a single opening. Each pair of split rings is positioned on opposite -sides of the abutment means with one ring of each pair of split rings engaging the abutment means. Each pair of rings is of sufficient diameter to be slideably received over the drill collar and has abutting conical surfaces oriented so that the axial movement of one split ring of each pair relative to the other split ring of the same pair results in a clamping or unclamping of the inner ring to the drill collar and the ~ - 3 -.. . - : . ., : : .. ~
- - \
9Z6'~
outer ring to the rigid main sleeve. An end cap is slideably and threadedly received by the rigid main sleeve to activate the clamping means. The improvement comprises a mechanical interlock means for engagement of the outer split ring of one pair of rings to the end cap whereby the outer ring is dis-engaged axially from the inner ring of the pair as the end cap is threadedly removed from the main sleeve. As a consequence from the latter disengagement the pair of rings is unclamped from the rigid main sleeve in the drill collar.
Advantageously the interlock means engagement of the outer ring to the end cap includes a radially projecting rib circumferentially disposed on the end cap in proximity to the end of the cap which engaged the outer split ring.
An annular groove in the end cap trails the rib of the end cap into the outer ring when the outer split ring is engaged by , the end cap. A circumferential rib projects radially inwardly Jl from the outer ring such that when the end cap engages the j outer split ring, the rib of the outer ring is substantially disposed within the annular groove on the end cap. In communi-cation with an interior cylindrical surface of the outer split ring is an annular groove. The rib of the end cap is substan-tially disposed within the annular groove of the outer split ring when the end cap engages the latter. Also included are means for biasing the groove and rib of the outer split ring toward the rib and groove collar respectively, of the end cap as the end cap engages the outer split ring.
f Preferably the groove and the rib on the end cap share a common wall and the groove and the rib on the outer split ring share a common end wall.
~ 30 Conveniently the means for biasing the groove and ', rib of the outer split ring is provided by the resiliency of ~ - 3a -i.f . ' ' .
,q. ,.;
" - ' "' `'' ' .
1~'79Z61 the outer split ring resulting from the split in the latter.
As the end cap is threadedly engaged by the rigid main sleeve, the outer split ring is urged against the inner split ring and is urged into clamping engagement with the rigid main sleeve. The inner ring is urged into clamping engagement with the drill collar and, as the end cap is threadedly dis-engaged from the main sleeve, the outer split ring is axially disengaged from the inner split ring thereby unclamping the inner split ring from the drill collar and the outer split ring from the main sleeve.
It is an object of the present invention to provide a drilling stabilizer which is easily applied to and removed from a drill collar. -Another object of the present invention is to utilize a clamping means of the drill stabilizer which allows the stabilizer to remain clampingly fixed to the drill collar without unduly restricting the flexibility of the collar.
A still further object of the present invention is to provide a clamping means in the drilling stabilizer which, when actuated by the end cap effectively affixes the stabilizer to the drill collar, and upon disengagement of the end cap from the rigid main sleeve unclamps the clamping means thereby allowing the drilling stabilizer to be axially repositioned or removed from the drill collar.
It is yet a further object of this invention to provide a clamping means on a drilling stabilizer which is effectively and automatically unclamped without applying shock forces to the drilling stabilizer or without the use of auxiliary tools other than those necessary to threadedly remove the end cap from the rigid main sleeve.
B A
~ ~79Z61 1 Further objects and other features and advantages of the present invention will be apparent in the following descxiption of the preferred embodiments of the invention, given for the purpose of disclosure and taken in conjunction with the accompany-ing drawings.
Brief Description of the Drawings Fig. 1 is an exploded vertical view of the upper portion of the drilling stabilizer showing the rigid main sleeve, an inner split locking ring, an outer split locking ring and one end cap with a clutch jaw.
Fig. 2 is a sectional view of part of the rigid main ' sleeve, the slideably received drill collar, the inner and , outer split locking rings and a portion of the end cap prior to ~ activating the clamping action of the inner and outer rings.
j Fig. 3 is a sectional view of a portion of the rigid main sleeve, the drill collar, the inner and outer split rings, and a portion of the end cap after the actuation of the clamping effect.
Fig. 4 is an exploded vertical view of the upper 20 portion of the drilling stabilizer showing the rigid main sleeve, an inner split locking ring, an outer split locking ring and one end cap with a clutch jaw.
Fig. 5 is a sectional view of part of the rigid main -sleeve, the slideably received drill collar, the inner and outer split locking rings and a portion of the end cap prior to activating the clamping action of the inner and outer rings.
J Fig. 6 is a sectional view of a portion of the rigid main sleeve, the drill collar, the inner and outer split rings, ` and a portion of the end cap after the actuation of the clamping 30 effect.
Description of the Preferred Embodiments Fig. 1. shows the upper portion of the drilling stabili-- ~- zer as it is commonly situated in a well bore. A main sleeve 2 ., .
: - - - . :
.
1~79Z61 1 having one or more outwardly projecting spiral flanges 4 has a substantially cylindrical internal passageway 9 extending axially the length of the main sleeve 2 and is suitable for receiving a drill collar 54 or other similar body. An inwardly projecting abutment means, for example an annular rib 56 (Figs. 2, 3), having an upper shoulder 50 and a lower shoulder not shown herein is disposed medially in the interior of the main sleeve 2. An inner split locking ring 74 having an open slot 77, an exterior conical surface 76 and an interior cylindrical surface 78 is slideably received into the passageway 9 of the main sleeve 2. The inner locking ring 74 is of a smaller diameter than the inner annular rib 56 of the main sleeve 2; therefore, the inner ring 74 is slideably received in passageway 9 of main sleeve 2 and abuts the shoulder 50 of the rib 56.
The outer locking ring 83 has an open slot 81, a cylindri-cal exterior surface 70, a substantially cylindrical interior surface 80 and a conical interior surface 72 conforming to th~
conical surface 76 of the inner split ring 74. The inner ring 74 substantially conforms to and underlies the conical surface 72 of the split ring 83 as shown in Fig. 2. On the upper portion of the interior cylindrical surface 80 of the outer locking ring 83 is disposed an inwardly projecting annular rib 82. An annular groove 84 is disposed immediately below the rib 82 as shown in Fig. 1, the groove 84 communicating with the interior cylindrical surface 80 of the outer ring 83. In the particular embodiment shown, the groove 84 and the rib 82 have a common radially-aligned wall 86. The outer split ring 83 is urged by means of any suitable leverage device (not shown) onto the end cap 12 and into locking engagement with said end cap before the end cap is threadedly engaged to the main sleeve 2.
An end cap 12 having a sleeve 13 of a greater diameter than the projecting member 18 is slideably received by the passage--. .- . : .................. , : ~
~ . . . .
~ 9Z6~
1 way 9 of the main sleeve 2. The threads 16 of the end cap 12 are compatible with the threads 6 of the main sleeve 2 thereby permitting threaded engagement of the end cap 12 with the main sleeve 2 until the leading shoulder 15 of the sleeve 13 abuts the leading surface 7 of the main sleeve. As depicted in Fig.
1, an outwardly projecting rib 22 is disposed on the projecting member 18 such that the lead wall 28 of the rib 22 is first received by the main sleeve 2. Contiguous to and having a ' common wall 26 with the rib 22 is an annular groove 20 communica-10 ting with the exterior of the projecting member 18 and having a trailing wall 24. When the end cap 12 is threadedly engaged into the main sleeve 2, the inner ring 74 abutting the shoulder 50 and the outer ring 83 are axially forced together whereby ' the inner ring 74 is urged radially inwardly to clampingly engage the exterior surface 60 of the drill collar 54 while the outer ring 83 is urged radially outwardly by the internal ring 74 into ` clamping engagement with the interior surface of the main sleeve
MECHANICAL INTERLOCK AND DISENGAGEMENT DEVIGE
1 Background of the Invention Oil field drilling operations utilizing a rotary drill string and having a section or sections of drill collar immediately above the drill bit require the application of a drilling stabilizer to the drill collar section or sections in order to minimize the seizure within the drill bore of the drill collar as well as to stabilize the drill string during drilling operations.
It is desired that a drilling stabilizer be quickly connected or disconnected to the drill collar, and that a minimum of manual operations be involved during the connecting or disconnect-ing of the stabilizer. It is further desirable to employ a drilling stabilizer which can be affixed to the collar section in such a man-ner that each stabilizer can be affixed at any desired interval from the preceding stabilizer. Those familiar with oil field opera-tions will recognize that the various combinations and spacings of drilling stabilizers are often determinative in obtaining a desired drilling result. It is also advantageous to utilize a drill-i ing stabilizer which is durable throughout a particular drilling operation and which is readily adaptable to any number of dissimilar drill collars utilized in oil field operations around the world.One such drilling stabilizer which has frequently been used is described and claimed in U.S. Patent No. 3,916,998 issued November ~ 4, 1975 to Samuel L. Bass, Jr., et al, entitled Drilling Stabilizer j and Method (hereinafter referred to as the '998 patent).
The drilling stabilizer described in the '998 patent comprises fundamentally a rigid main sleeve having an axial passage-way extending therethrough and a rib midway of the passageway against each side which a pair of slideably received rings abut. An end cap is threadedly engaged into each end of the rigid main sleeve in such a manner that as the end cap is threaded into the sleeve the inner ring of a pair of rings is forcefully urged into a clamping engagement with the outer surface of the drill collar.
'' ~1_ ~ ,' .. . .. . . . .
~079Z61 1 Likewise, the outer ring is forced against the inner surface of the main sleeve. Consequently, the device in the '998 patent can be selectively applied to any location on a drilling collar. More-over, since only the interior surface of the inner split ring con-tacts the drill collar, flexibility within the drill collar is not sacrificed by the application of numerous drilling stabilizers.
A shortcoming of the device in the '998 patent, however, has been that once the drilling stabilizer is successfully clamped onto the drill collar, it is frequently difficult to disengage and remove the stabilizer from the collar. Those familiar with drilling operations appreciate that mere removal of the end cap from the rigid main sleeve often does not disengage the outer split ring from the inner split ring on either or both pairs of rings. Con-sequently, although the end cap has been threadedly disengaged from the rigid main sleeve, the corresponding pair of split rings still exerts a force or forces clamping the stabilizer to the collar. A common practice for disengaging the stabilizer from the collar has been to strike the stabilizer forcefully with any suit-able device such as a large hammer. Such an operation clearly requires additional manual effort, tools, time and is also destructive of the stabilizer itself.
The present invention is directed toward the elimination of the shortcomings of a drilling stabilizer similar to the one shown and described in the '998 patent. The present invention described and claimed hereinafter employs an annular ring and an annular groove on the interior surface of the outer split ring and an annular groove and annular rib on the exterior surface of the end cap whereby the rib of the outer ring is substantially disposed within the groove of the end cap and the rib of the end cap is substantially disposed within the groove of the outer ring. The outer ring is preferably urged into engagement with the end clamp before threading the end cap into the main sleeve. The interaction D79z61 between the groove and the rib on the ring with the rib and groove respectively of the end cap produces a locking action in the axial direction. The result of the axial interlock configuration is that the outer split ring necessarily follows the end cap as the end cap is threadedly disengaged from the rigid main sleeve, thereby unclamping the pair of rings from the sleeve and drill collar. Those familiar with drilling operations will realize that as the second end cap is threadedly disengaged from the drilling stabilizer that the stabilizer itself can be axially moved along the drill collar for ; repositioning, engagement and disengagement with the collar.
According to the invention there is provided an improved drilling stabilizer having a substantially cylindrical rigid main sleeve, an axial passageway extending the entire length of the rigid main sleeve and including an inwardly extending fixed abutment means medially of the passageway.
¦ The innermost extent of the abutment means defines an 3 opening of sufficient size to permit the sleeve to be slideably received over a drill collar. Extending radially outwardly , 20 of the rigid main sleeve is a flange. A clamping means ¦ positioned internally of the rigid main sleeve adjacent the , fixed abutment means includes a first and second pair of , overlying inner and outer split rings each having a single opening. Each pair of split rings is positioned on opposite -sides of the abutment means with one ring of each pair of split rings engaging the abutment means. Each pair of rings is of sufficient diameter to be slideably received over the drill collar and has abutting conical surfaces oriented so that the axial movement of one split ring of each pair relative to the other split ring of the same pair results in a clamping or unclamping of the inner ring to the drill collar and the ~ - 3 -.. . - : . ., : : .. ~
- - \
9Z6'~
outer ring to the rigid main sleeve. An end cap is slideably and threadedly received by the rigid main sleeve to activate the clamping means. The improvement comprises a mechanical interlock means for engagement of the outer split ring of one pair of rings to the end cap whereby the outer ring is dis-engaged axially from the inner ring of the pair as the end cap is threadedly removed from the main sleeve. As a consequence from the latter disengagement the pair of rings is unclamped from the rigid main sleeve in the drill collar.
Advantageously the interlock means engagement of the outer ring to the end cap includes a radially projecting rib circumferentially disposed on the end cap in proximity to the end of the cap which engaged the outer split ring.
An annular groove in the end cap trails the rib of the end cap into the outer ring when the outer split ring is engaged by , the end cap. A circumferential rib projects radially inwardly Jl from the outer ring such that when the end cap engages the j outer split ring, the rib of the outer ring is substantially disposed within the annular groove on the end cap. In communi-cation with an interior cylindrical surface of the outer split ring is an annular groove. The rib of the end cap is substan-tially disposed within the annular groove of the outer split ring when the end cap engages the latter. Also included are means for biasing the groove and rib of the outer split ring toward the rib and groove collar respectively, of the end cap as the end cap engages the outer split ring.
f Preferably the groove and the rib on the end cap share a common wall and the groove and the rib on the outer split ring share a common end wall.
~ 30 Conveniently the means for biasing the groove and ', rib of the outer split ring is provided by the resiliency of ~ - 3a -i.f . ' ' .
,q. ,.;
" - ' "' `'' ' .
1~'79Z61 the outer split ring resulting from the split in the latter.
As the end cap is threadedly engaged by the rigid main sleeve, the outer split ring is urged against the inner split ring and is urged into clamping engagement with the rigid main sleeve. The inner ring is urged into clamping engagement with the drill collar and, as the end cap is threadedly dis-engaged from the main sleeve, the outer split ring is axially disengaged from the inner split ring thereby unclamping the inner split ring from the drill collar and the outer split ring from the main sleeve.
It is an object of the present invention to provide a drilling stabilizer which is easily applied to and removed from a drill collar. -Another object of the present invention is to utilize a clamping means of the drill stabilizer which allows the stabilizer to remain clampingly fixed to the drill collar without unduly restricting the flexibility of the collar.
A still further object of the present invention is to provide a clamping means in the drilling stabilizer which, when actuated by the end cap effectively affixes the stabilizer to the drill collar, and upon disengagement of the end cap from the rigid main sleeve unclamps the clamping means thereby allowing the drilling stabilizer to be axially repositioned or removed from the drill collar.
It is yet a further object of this invention to provide a clamping means on a drilling stabilizer which is effectively and automatically unclamped without applying shock forces to the drilling stabilizer or without the use of auxiliary tools other than those necessary to threadedly remove the end cap from the rigid main sleeve.
B A
~ ~79Z61 1 Further objects and other features and advantages of the present invention will be apparent in the following descxiption of the preferred embodiments of the invention, given for the purpose of disclosure and taken in conjunction with the accompany-ing drawings.
Brief Description of the Drawings Fig. 1 is an exploded vertical view of the upper portion of the drilling stabilizer showing the rigid main sleeve, an inner split locking ring, an outer split locking ring and one end cap with a clutch jaw.
Fig. 2 is a sectional view of part of the rigid main ' sleeve, the slideably received drill collar, the inner and , outer split locking rings and a portion of the end cap prior to ~ activating the clamping action of the inner and outer rings.
j Fig. 3 is a sectional view of a portion of the rigid main sleeve, the drill collar, the inner and outer split rings, and a portion of the end cap after the actuation of the clamping effect.
Fig. 4 is an exploded vertical view of the upper 20 portion of the drilling stabilizer showing the rigid main sleeve, an inner split locking ring, an outer split locking ring and one end cap with a clutch jaw.
Fig. 5 is a sectional view of part of the rigid main -sleeve, the slideably received drill collar, the inner and outer split locking rings and a portion of the end cap prior to activating the clamping action of the inner and outer rings.
J Fig. 6 is a sectional view of a portion of the rigid main sleeve, the drill collar, the inner and outer split rings, ` and a portion of the end cap after the actuation of the clamping 30 effect.
Description of the Preferred Embodiments Fig. 1. shows the upper portion of the drilling stabili-- ~- zer as it is commonly situated in a well bore. A main sleeve 2 ., .
: - - - . :
.
1~79Z61 1 having one or more outwardly projecting spiral flanges 4 has a substantially cylindrical internal passageway 9 extending axially the length of the main sleeve 2 and is suitable for receiving a drill collar 54 or other similar body. An inwardly projecting abutment means, for example an annular rib 56 (Figs. 2, 3), having an upper shoulder 50 and a lower shoulder not shown herein is disposed medially in the interior of the main sleeve 2. An inner split locking ring 74 having an open slot 77, an exterior conical surface 76 and an interior cylindrical surface 78 is slideably received into the passageway 9 of the main sleeve 2. The inner locking ring 74 is of a smaller diameter than the inner annular rib 56 of the main sleeve 2; therefore, the inner ring 74 is slideably received in passageway 9 of main sleeve 2 and abuts the shoulder 50 of the rib 56.
The outer locking ring 83 has an open slot 81, a cylindri-cal exterior surface 70, a substantially cylindrical interior surface 80 and a conical interior surface 72 conforming to th~
conical surface 76 of the inner split ring 74. The inner ring 74 substantially conforms to and underlies the conical surface 72 of the split ring 83 as shown in Fig. 2. On the upper portion of the interior cylindrical surface 80 of the outer locking ring 83 is disposed an inwardly projecting annular rib 82. An annular groove 84 is disposed immediately below the rib 82 as shown in Fig. 1, the groove 84 communicating with the interior cylindrical surface 80 of the outer ring 83. In the particular embodiment shown, the groove 84 and the rib 82 have a common radially-aligned wall 86. The outer split ring 83 is urged by means of any suitable leverage device (not shown) onto the end cap 12 and into locking engagement with said end cap before the end cap is threadedly engaged to the main sleeve 2.
An end cap 12 having a sleeve 13 of a greater diameter than the projecting member 18 is slideably received by the passage--. .- . : .................. , : ~
~ . . . .
~ 9Z6~
1 way 9 of the main sleeve 2. The threads 16 of the end cap 12 are compatible with the threads 6 of the main sleeve 2 thereby permitting threaded engagement of the end cap 12 with the main sleeve 2 until the leading shoulder 15 of the sleeve 13 abuts the leading surface 7 of the main sleeve. As depicted in Fig.
1, an outwardly projecting rib 22 is disposed on the projecting member 18 such that the lead wall 28 of the rib 22 is first received by the main sleeve 2. Contiguous to and having a ' common wall 26 with the rib 22 is an annular groove 20 communica-10 ting with the exterior of the projecting member 18 and having a trailing wall 24. When the end cap 12 is threadedly engaged into the main sleeve 2, the inner ring 74 abutting the shoulder 50 and the outer ring 83 are axially forced together whereby ' the inner ring 74 is urged radially inwardly to clampingly engage the exterior surface 60 of the drill collar 54 while the outer ring 83 is urged radially outwardly by the internal ring 74 into ` clamping engagement with the interior surface of the main sleeve
2. Further engagement of the threads 16 with the compatible threads 6 allows axial forces to be transmitted by the lead 20 wall 28 and the trailing wall 24 of the end cap 12 to a trailing J wall 88 and a leading wall 90 respectively of the outer ring, thereby urging the outer ring 83 axially toward the inner ring 74 , thereby increasing the clamping force between the inner ring 74and the drill collar 54 and the outer ring 83 and the main sleeve 2 as shown in Fig. 3.
As the end cap 12 is threadedly disengaged from the main sleeve 2, the common wall 26 of the end cap is urged against a common wall 86 of the outer ring 83 whereby the outer ring 83 is successfully and forceably disengaged from the inner ring 74.
30 The disengagement of the outer ring 83 from the inner ring 74, therefore, reduces the radial forces of the inner ring 74 upon ; the drill collar 54 and the radial forces of the outer ring 83 1~7926~
1 upon the main sleeve 2 thereby releasing the upper portion of the main sleeve 2 from clamping engagement with the drill collar 54.
Another embodiment of the new drilling stabilizer is shown in Figs. 4, 5 and 6. The inner locking ring 44 is of a smaller diameter than the inner annular rib 56 of the main sleeve 2; therefore, the inner ring 44 is slideably received in passageway 9 of main sleeve 2 and abuts the shoulder 50 of ; the rib 56.
The outer locking ring 30 has an open slot 31, a -cylindrical exterior surface 42, a conical exterior surface 19 and a substantially cylindrical interior surface 43. The in- `
ner ring 44 substantially overlies the conical surface 19 of the split ring 30 as shown in Fig. 5. On the upper portion of the interior cylindrical surface 43 of the outer locking ring 30 is disposed an inwardly projecting annular rib 32. An annular groove 34 is disposed immediately below the rib 32 as shown in Fig. 4, the groove 34 communicating with the interior cylindrical surface 43 of the outer ring 30. In the particular embodiment shown, the groove 34 and the rib 32 have a common radially-aligned wall 40. The outer split ring 30 is urged by means of any suitable leverage device (not shown) onto the end cap 12 and into locking engagement with said end cap before the end cap is threadedly engaged to the main sleeve 2.
An end cap 12 having a sleeve 13 of a greater diameter than the projecting member 18 is slideably received by the passageway 9 of the main sleeve 2. The threads 16 of the end cap 12 are compatible with the threads 6 of the main sleeve 2 thereby permitting threaded engagement of the end cap 12 with the main sleeve 2 until the leading shoulder 15 of the sleeve 13 abuts the leading surface 7 of the main sleeve. As depicted in Fig. 4, an outwardly projecting rib 22 is disposed on the :, . : , . ., . : : , ~ 1t~79Z61 1 projecting member 18 such that the lead wall 28 of the rib 22 ~ .
is first received by the main sleeve 2. Contiguous to and having a common wall 26 with the rib 22 is an annular groove 20 communi-cating with the exterior of the projecting member 18 and having a trailing wall 24. When the end cap 12 is threadedly engaged .
into the main sleeve 2, the inner ring 44 abutting the shoulder 50 and the outer ring 30 are axially forced together whereby the inner ring 44 is urged radially outwardly to clampingly engage the interior surface of the main sleeve 2 while the outer ring 30 is urged radially inwardly by the internal ring 44 into clamping engagement with the exterior surface 60 of the drill .
collar 54. Further engagement of the threads 16 with the compatible threads 6 allows axial forces to be transmitted by the lead wall 28 and the trailing wall 24 of the end cap 12 to the trailing wall 38 and the leading wall 36 respectively of the ou*er ring, thereby urging the outer ring 30 axially toward the inner ring 44 thereby increasing the clamping force between the inner ring 44 and the main sleeve 2 and the outer ring 30 -and the drill collar 54 as shown in Fig. 6.
As the end cap 12 is threadedly disengaged from the main sleeve 2, the common wall 26 of the end cap is urged against the common wall 40 of the outer ring 30 whereby the outer ring 30 is successfully and forceably disengaged from the inner ring 44. The disengagement of the outer ring 30 from the inner ring 44, therefore, reduces the radial forces of the inner ring 44 upon the main sleeve 2 and the radial forces of the outer ring ::
30 upon the drill collar 54 thereby releasing the upper portion : .
of the main sleeve 2 from clamping engagement with the drill collar 54.
It is understood that a pair of rings and an end cap similar to the rings 30, 44 and the end cap 12 as shown in Fig.
4 are also received by the lower end of the main sleeve 2, 1[)'79Z6~
1 thereby clamping the bottom portion of the main sleeve 2 onto the drill collar 54.
. It is understood that in the preferred embodiment of the present invention a pair of rings and an end cap similar to the rings 83, 74 and the end cap 12 as shown in Fig. 1 are also received by the lower end of the main sleeve 2, thereby ;~ clamping the bottom portion of the main sleeve 2 onto the drill collar 54.
In oil field operations, therefore, the invention as described and claimed herein in quickly and easily engaged to or disengaged from the drill collar. A typical procedure for disengagement requires the slips (not shown) to be set below the stabilizer. The upper end cap 12 is "broken out" or threadedly disengaged from the main sleeve 2 with, for example, a tong (not shown). The drill collar 54 is then raised through the slips and set at a level appropriate for the lower end cap (not shown) to be broken out from the main sleeve 2. Before the lower end cap is broken out from the main sleeve 2, it is j desirable to support the drilling stabilizer, for example, by an air hoist line or cat line (not shown). The final step is to break out the lower end cap from the main sleeve 2. As the lower end cap is threadedly disengaged from the main sleeve 2, the clamping forces affixing the stabilizer to the drill collar 54 have been reduced, and the stabilizer is now free to slide on -~ the collar. For reasons of safety, the air hoist line or cat line should be attached to the stabilizer prior to breaking out the lower end cap for support of the stabilizer as it becomes free to slide on the collar.
It is, therefore, clear that the present invention is 30 a new and useful design for a drilling stabilizer which is both suitable for downhole use in the oil field while at the same time fulfills all the objectives as previously expressed _g_ 1~79Z61 1 herein. The preferred embodiments of the present invention have been given for the purpose of disclosure, and changes may be made which are within the spirit and the scope of the invention as defined by the claims, specification and drawings ;: :
herein.
' "
'-' '' .
:,
As the end cap 12 is threadedly disengaged from the main sleeve 2, the common wall 26 of the end cap is urged against a common wall 86 of the outer ring 83 whereby the outer ring 83 is successfully and forceably disengaged from the inner ring 74.
30 The disengagement of the outer ring 83 from the inner ring 74, therefore, reduces the radial forces of the inner ring 74 upon ; the drill collar 54 and the radial forces of the outer ring 83 1~7926~
1 upon the main sleeve 2 thereby releasing the upper portion of the main sleeve 2 from clamping engagement with the drill collar 54.
Another embodiment of the new drilling stabilizer is shown in Figs. 4, 5 and 6. The inner locking ring 44 is of a smaller diameter than the inner annular rib 56 of the main sleeve 2; therefore, the inner ring 44 is slideably received in passageway 9 of main sleeve 2 and abuts the shoulder 50 of ; the rib 56.
The outer locking ring 30 has an open slot 31, a -cylindrical exterior surface 42, a conical exterior surface 19 and a substantially cylindrical interior surface 43. The in- `
ner ring 44 substantially overlies the conical surface 19 of the split ring 30 as shown in Fig. 5. On the upper portion of the interior cylindrical surface 43 of the outer locking ring 30 is disposed an inwardly projecting annular rib 32. An annular groove 34 is disposed immediately below the rib 32 as shown in Fig. 4, the groove 34 communicating with the interior cylindrical surface 43 of the outer ring 30. In the particular embodiment shown, the groove 34 and the rib 32 have a common radially-aligned wall 40. The outer split ring 30 is urged by means of any suitable leverage device (not shown) onto the end cap 12 and into locking engagement with said end cap before the end cap is threadedly engaged to the main sleeve 2.
An end cap 12 having a sleeve 13 of a greater diameter than the projecting member 18 is slideably received by the passageway 9 of the main sleeve 2. The threads 16 of the end cap 12 are compatible with the threads 6 of the main sleeve 2 thereby permitting threaded engagement of the end cap 12 with the main sleeve 2 until the leading shoulder 15 of the sleeve 13 abuts the leading surface 7 of the main sleeve. As depicted in Fig. 4, an outwardly projecting rib 22 is disposed on the :, . : , . ., . : : , ~ 1t~79Z61 1 projecting member 18 such that the lead wall 28 of the rib 22 ~ .
is first received by the main sleeve 2. Contiguous to and having a common wall 26 with the rib 22 is an annular groove 20 communi-cating with the exterior of the projecting member 18 and having a trailing wall 24. When the end cap 12 is threadedly engaged .
into the main sleeve 2, the inner ring 44 abutting the shoulder 50 and the outer ring 30 are axially forced together whereby the inner ring 44 is urged radially outwardly to clampingly engage the interior surface of the main sleeve 2 while the outer ring 30 is urged radially inwardly by the internal ring 44 into clamping engagement with the exterior surface 60 of the drill .
collar 54. Further engagement of the threads 16 with the compatible threads 6 allows axial forces to be transmitted by the lead wall 28 and the trailing wall 24 of the end cap 12 to the trailing wall 38 and the leading wall 36 respectively of the ou*er ring, thereby urging the outer ring 30 axially toward the inner ring 44 thereby increasing the clamping force between the inner ring 44 and the main sleeve 2 and the outer ring 30 -and the drill collar 54 as shown in Fig. 6.
As the end cap 12 is threadedly disengaged from the main sleeve 2, the common wall 26 of the end cap is urged against the common wall 40 of the outer ring 30 whereby the outer ring 30 is successfully and forceably disengaged from the inner ring 44. The disengagement of the outer ring 30 from the inner ring 44, therefore, reduces the radial forces of the inner ring 44 upon the main sleeve 2 and the radial forces of the outer ring ::
30 upon the drill collar 54 thereby releasing the upper portion : .
of the main sleeve 2 from clamping engagement with the drill collar 54.
It is understood that a pair of rings and an end cap similar to the rings 30, 44 and the end cap 12 as shown in Fig.
4 are also received by the lower end of the main sleeve 2, 1[)'79Z6~
1 thereby clamping the bottom portion of the main sleeve 2 onto the drill collar 54.
. It is understood that in the preferred embodiment of the present invention a pair of rings and an end cap similar to the rings 83, 74 and the end cap 12 as shown in Fig. 1 are also received by the lower end of the main sleeve 2, thereby ;~ clamping the bottom portion of the main sleeve 2 onto the drill collar 54.
In oil field operations, therefore, the invention as described and claimed herein in quickly and easily engaged to or disengaged from the drill collar. A typical procedure for disengagement requires the slips (not shown) to be set below the stabilizer. The upper end cap 12 is "broken out" or threadedly disengaged from the main sleeve 2 with, for example, a tong (not shown). The drill collar 54 is then raised through the slips and set at a level appropriate for the lower end cap (not shown) to be broken out from the main sleeve 2. Before the lower end cap is broken out from the main sleeve 2, it is j desirable to support the drilling stabilizer, for example, by an air hoist line or cat line (not shown). The final step is to break out the lower end cap from the main sleeve 2. As the lower end cap is threadedly disengaged from the main sleeve 2, the clamping forces affixing the stabilizer to the drill collar 54 have been reduced, and the stabilizer is now free to slide on -~ the collar. For reasons of safety, the air hoist line or cat line should be attached to the stabilizer prior to breaking out the lower end cap for support of the stabilizer as it becomes free to slide on the collar.
It is, therefore, clear that the present invention is 30 a new and useful design for a drilling stabilizer which is both suitable for downhole use in the oil field while at the same time fulfills all the objectives as previously expressed _g_ 1~79Z61 1 herein. The preferred embodiments of the present invention have been given for the purpose of disclosure, and changes may be made which are within the spirit and the scope of the invention as defined by the claims, specification and drawings ;: :
herein.
' "
'-' '' .
:,
Claims (9)
1. An improved drilling stabilizer having a substantially cylindrical rigid main sleeve, an axial passageway extending the entire length of the rigid main sleeve and including an inwardly extending fixed abutment means medially of the passageway, the innermost extent of which abutment means defines an opening of sufficient size to permit the sleeve to be slideably received over a drill collar, a flange extend-ing radially outwardly of the rigid main sleeve, a clamping means positioned internally of the rigid main sleeve adjacent the fixed abutment means including first and second pairs of overlying inner and outer split rings each having a single opening, each pair of split rings positioned on opposite sides of the abutment means, one ring of each pair of split rings engaging the abutment means, each pair of rings of sufficient diameter to be slideably received over the drill collar and having abutting conical surfaces oriented so that the axial movement of one split ring of each pair relative to the other split ring of the same pair results in a clamping or unclamping of the inner ring to the drill collar and the outer ring to the rigid main sleeve, and an end cap slideably and threadedly received by the rigid main sleeve to activate the clamping means, wherein the improvement comprises:
a mechanical interlock means for engagement of the outer split ring of one pair of rings to the end cap whereby the outer ring is disengaged axially from the inner ring of the pair as the end cap is threadedly removed from the main sleeve, thereby unclamping the pair of rings from the rigid main sleeve and the drill collar.
a mechanical interlock means for engagement of the outer split ring of one pair of rings to the end cap whereby the outer ring is disengaged axially from the inner ring of the pair as the end cap is threadedly removed from the main sleeve, thereby unclamping the pair of rings from the rigid main sleeve and the drill collar.
2. The apparatus of claim 1 wherein the interlock means engagement of the outer ring to the end cap comprises:
(a) a radially projecting rib circum-ferentially disposed on the end cap in proximity to the end of the cap which engaged the outer split ring;
(b) an annular groove in the end cap, which trails the rib of the end cap into the outer ring when said outer split ring is engaged by the end cap;
(c) a circumferential rib projecting radially inwardly from the outer ring such that when the end cap engages the outer split ring, the rib of the outer ring is substantially disposed within the annular groove on the end cap;
(d) an annular groove in communication with an interior cylindrical surface of the outer split ring, whereby the rib of the end cap is substan-tially disposed within the annular groove of the outer split ring when the end cap engages the outer split ring; and (e) means for biasing the groove and rib of the outer split ring toward the rib and groove respectively of the end cap as the end cap engages the outer split ring.
(a) a radially projecting rib circum-ferentially disposed on the end cap in proximity to the end of the cap which engaged the outer split ring;
(b) an annular groove in the end cap, which trails the rib of the end cap into the outer ring when said outer split ring is engaged by the end cap;
(c) a circumferential rib projecting radially inwardly from the outer ring such that when the end cap engages the outer split ring, the rib of the outer ring is substantially disposed within the annular groove on the end cap;
(d) an annular groove in communication with an interior cylindrical surface of the outer split ring, whereby the rib of the end cap is substan-tially disposed within the annular groove of the outer split ring when the end cap engages the outer split ring; and (e) means for biasing the groove and rib of the outer split ring toward the rib and groove respectively of the end cap as the end cap engages the outer split ring.
3. The apparatus of claim 2 wherein the groove and the rib on the end cap share a common wall and the groove and the rib on the outer split ring share a common end wall.
4. The apparatus of claim 3 wherein the means (e) is the resiliency of the outer split ring resulting from the split in said outer split ring.
5. The apparatus of claim 4 wherein as the end cap is threadedly engaged by the rigid main sleeve, the outer split ring is urged against the inner split ring and is urged into clamping engagement with the rigid main sleeve, the inner ring is urged into clamping engagement with the drill collar, and, as the end cap is threadedly disengaged from the main sleeve, the outer split ring is axially disengaged from the inner split ring thereby unclamping the inner split ring from the drill collar and the outer split ring from the main sleeve.
6. An improved drilling stabilizer having a substantially cylindrical rigid main sleeve, an axial passageway extending the entire length of the rigid main sleeve and including an inwardly extending fixed abutment means medially of the passage-way, the innermost extent of which abutment means defines an opening of sufficient size to permit the sleeve to be slideably received over a drill collar, a flange extending radially out-wardly of the rigid main sleeve, a clamping means positioned internally of the rigid main sleeve adjacent the fixed abutment means including first and second pairs of overlying inner and outer split rings each having a single opening, each pair of split rings positioned on opposite sides of the abutment means, one ring of each pair of split rings engaging the abutment means, each pair of rings of sufficient diameter to be slideably received over the drill collar and having abutting conical surfaces oriented so that the axial movement of one split ring of each pair relative to the other split ring of the same pair results in a clamping or unclamping of the inner ring to the rigid main sleeve and the outer ring to the drill collar, and an end cap slideably and threadedly received by the rigid main sleeve to activate the clamping means, wherein the improve-ment comprises:
a mechanical interlock means for engagement of the outer split ring of one pair of rings to the end cap wherein as the end cap is threadedly engaged by the rigid main sleeve, the outer split ring is urged into clamping engagement with the inner split ring and the drill collar, the inner ring is urged into clamping engagement with the outer split ring and the rigid main sleeve and as the end cap is threadedly dis-engaged from the main sleeve, the outer split ring is axially disengaged from the inner split ring thereby unclamping the inner split ring from the main sleeve and the outer split ring from the drill collar.
a mechanical interlock means for engagement of the outer split ring of one pair of rings to the end cap wherein as the end cap is threadedly engaged by the rigid main sleeve, the outer split ring is urged into clamping engagement with the inner split ring and the drill collar, the inner ring is urged into clamping engagement with the outer split ring and the rigid main sleeve and as the end cap is threadedly dis-engaged from the main sleeve, the outer split ring is axially disengaged from the inner split ring thereby unclamping the inner split ring from the main sleeve and the outer split ring from the drill collar.
7. The apparatus of claim 6 wherein the interlock means for engagement of the outer ring to the end cap comprises:
(a) a radially projecting rib circumferen-tially disposed on the end cap in proximity to the end of the cap which engages the outer split ring;
(b) an annular groove in the end cap, which trails the rib of the end cap into the outer ring when said outer split ring is engaged by the end cap;
(c) a circumferential rib projecting radially inwardly from the outer ring such that when the end cap engages the outer split ring, the rib of the outer ring is substantially disposed within the annular groove on the end cap;
(d) an annular groove in communication with an interior cylindrical surface of the outer split ring, whereby the rib of the end cap is substantially dis-posed within the annular groove of the outer split ring when the end cap engages the outer split ring;
and (e) means for biasing the groove and rib of the outer split ring toward the rib and groove res-pectively of the end cap as the end cap engages the outer split ring.
(a) a radially projecting rib circumferen-tially disposed on the end cap in proximity to the end of the cap which engages the outer split ring;
(b) an annular groove in the end cap, which trails the rib of the end cap into the outer ring when said outer split ring is engaged by the end cap;
(c) a circumferential rib projecting radially inwardly from the outer ring such that when the end cap engages the outer split ring, the rib of the outer ring is substantially disposed within the annular groove on the end cap;
(d) an annular groove in communication with an interior cylindrical surface of the outer split ring, whereby the rib of the end cap is substantially dis-posed within the annular groove of the outer split ring when the end cap engages the outer split ring;
and (e) means for biasing the groove and rib of the outer split ring toward the rib and groove res-pectively of the end cap as the end cap engages the outer split ring.
8. The apparatus of claim 7 wherein the groove and the rib on the end cap share a common wall and the groove and the rib on the outer split ring share a common end wall.
9. The apparatus of claim 8 wherein the means (e) is the resiliency of the outer split ring resulting from the split in said outer split ring.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/838,686 US4101179A (en) | 1977-10-03 | 1977-10-03 | Drilling stabilizer including mechanical interlock device |
| US91370878A | 1978-06-08 | 1978-06-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1079261A true CA1079261A (en) | 1980-06-10 |
Family
ID=27126054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA312,523A Expired CA1079261A (en) | 1977-10-03 | 1978-10-02 | Drilling stabilizer including mechanical interlock and disengagement device |
Country Status (7)
| Country | Link |
|---|---|
| CA (1) | CA1079261A (en) |
| DE (1) | DE2836747C3 (en) |
| FR (1) | FR2404732A1 (en) |
| GB (1) | GB2005750B (en) |
| IN (1) | IN150430B (en) |
| MX (1) | MX146768A (en) |
| NL (1) | NL7808256A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4245709A (en) * | 1979-04-27 | 1981-01-20 | Christensen, Inc. | Removable drill string stabilizers |
| US5695297A (en) * | 1996-09-11 | 1997-12-09 | Fenner, Inc. | Mounting device |
| US6957704B2 (en) | 2003-05-14 | 2005-10-25 | Halliburton Energy Services Inc. | Limit clamp for use with casing attachments |
| GB2501743B (en) * | 2012-05-03 | 2019-02-06 | M I Drilling Fluids Uk Ltd | Tool assembly apparatus and method |
| NO337229B1 (en) * | 2012-07-12 | 2016-02-15 | Ace Oil Tools As | Fixing device for a pipe body provided with one or more axially projecting functional elements adapted for use on a downhole pipe body, as well as a pipe string comprising several pipe bodies |
| CN112761544B (en) * | 2021-02-03 | 2022-08-09 | 山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队) | Clamping and centering device for geophysical prospecting logging probe tube |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1561507A (en) * | 1925-04-25 | 1925-11-17 | Clark Ed William | Pinion or pulley coupling |
| FR55652E (en) * | 1942-06-05 | 1952-09-03 | Isnard Freres Sa Des Ets | Quick assembly device for driving or receiving parts on their shaft |
| US2447299A (en) * | 1945-03-14 | 1948-08-17 | American Pulley Co | Fastening means |
| US2556151A (en) * | 1946-05-01 | 1951-06-05 | Morse Chain Co | Quick detachable hub |
| DE2159813C3 (en) * | 1971-12-02 | 1974-05-09 | Oskar E. 7129 Brackenheim Peter | Clamping set in double design with conical elements for hub attachment |
| CH559323A5 (en) * | 1972-03-04 | 1975-02-28 | Peter Oskar E | |
| US3916998A (en) * | 1974-11-05 | 1975-11-04 | Jr Samuel L Bass | Drilling stabilizer and method |
-
1978
- 1978-08-04 IN IN855/CAL/78A patent/IN150430B/en unknown
- 1978-08-07 NL NL7808256A patent/NL7808256A/en active Search and Examination
- 1978-08-22 DE DE2836747A patent/DE2836747C3/en not_active Expired
- 1978-08-31 MX MX174727A patent/MX146768A/en unknown
- 1978-09-01 GB GB7835360A patent/GB2005750B/en not_active Expired
- 1978-09-29 FR FR7827942A patent/FR2404732A1/en active Granted
- 1978-10-02 CA CA312,523A patent/CA1079261A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2836747B2 (en) | 1980-09-25 |
| FR2404732A1 (en) | 1979-04-27 |
| IN150430B (en) | 1982-10-02 |
| GB2005750B (en) | 1982-02-10 |
| FR2404732B1 (en) | 1984-06-22 |
| DE2836747A1 (en) | 1979-04-05 |
| DE2836747C3 (en) | 1981-06-11 |
| NL7808256A (en) | 1979-04-05 |
| GB2005750A (en) | 1979-04-25 |
| MX146768A (en) | 1982-08-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |