US3916998A - Drilling stabilizer and method - Google Patents

Drilling stabilizer and method Download PDF

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Publication number
US3916998A
US3916998A US521055A US52105574A US3916998A US 3916998 A US3916998 A US 3916998A US 521055 A US521055 A US 521055A US 52105574 A US52105574 A US 52105574A US 3916998 A US3916998 A US 3916998A
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United States
Prior art keywords
stabilizer
clamping
string
stabilizer member
uppermost
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Expired - Lifetime
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US521055A
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English (en)
Inventor
Jr Samuel L Bass
Herman J Schellstede
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Individual
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Individual
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Filing date
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Priority to US521055A priority Critical patent/US3916998A/en
Priority to DE19752535588 priority patent/DE2535588C3/de
Priority to SE7509034A priority patent/SE7509034L/xx
Priority to FR7525073A priority patent/FR2290563A1/fr
Priority to BE159154A priority patent/BE832373A/xx
Priority to GB34880/75A priority patent/GB1479255A/en
Priority to NO752940A priority patent/NO752940L/no
Priority to DK385775A priority patent/DK385775A/da
Priority to JP50123324A priority patent/JPS5165001A/ja
Priority to NL7512520A priority patent/NL7512520A/xx
Priority to BR7507107*A priority patent/BR7507107A/pt
Application granted granted Critical
Publication of US3916998A publication Critical patent/US3916998A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • 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
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/06—Releasing-joints, e.g. safety joints
    • 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
    • E21B17/16—Drill collars
    • 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
    • E21B31/00—Fishing for or freeing objects in boreholes or wells
    • E21B31/002—Destroying the objects to be fished, e.g. by explosive means
    • 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

Definitions

  • a rigid stabilizer sleeve having outwardly extending Asslgneei Samuel Bass, J N Iberia, ribs is slidably received over a collar, internal clamp [22] Filed; No 5, 1974 rings operate to clamp the stabilizer at any desired position on the drill collar; another aspect resides in a PP 521,055 structure and method of operation enabling use of a v washover tool upon seizure of the string by providing 52 US. (:1. 166/301; 166/241; 166/315; jaw Clutch s OPPosite ends each Stabilizer 175/325; 308/4 A and an upwardly facing jaw clutch immediately above 51 Int. (:1.
  • This invention is in the field of drilling equipment and methods of operation and is specifically directed to apparatus and methods of achieving optimum drill string stabilization while permitting a washover operation through the stabilizer means in the event the string should be seized by the formation at any point below any of the stabilizers.
  • Another object of the invention is the provision of .a new and improved drill string method and apparatus capable of providing optimum drill string stabilization while-permitting the unimpaired operation of i a washover tool along the length of the string for clearin any obstruction seizing the string.
  • First and second split rings having abutting inclined conical surfaces engageable'with each other are provided adjacent the fixed abutment means and an axially movable clamping actuator iii "the form of a cap sleeve threadably received on the interior of the ain sleeve member is movable against the clamping rings to result in inward clamping'force 'betwe'en the main sleeve member and the collar section oven-which the stabilizer is mounted.
  • the lower end of the main sleeve is provided with a downwardly facing jaw clutch and the upper end of the cap sleeve is provided with an identical upwardly facing jaw clutch so that a washover tool cutting through the stabilizer will release the clamping rings and the stabilizer will then move downwardly to engage the next adjacent stabilizer member.
  • the jaw clutch on the lower end of the main sleeve will engage the upwardly facing jaw clutch of the cap sleeve of the next lower stabilizer member to prevent further rotation of the upper stabilizer. Consequently, the washover tool can then cut through the remaining portions of the upper stabilizer and eventually work its way down the entire string by a repetitive process.
  • An integral upwardly facing jaw clutch on the upper side of the bit engages the lowermost stabilizer member after it has been released by operation of the washover tool and permits the washover tool to then cut through the lowermost stabilizer member and then through the bit if necessary in order to clear the entire string.
  • An auxiliary attachment for use with the invention comprises an auxiliary jaw clutch mounted between the lower end of the lowermost collar member and a conventional bit and having an upwardly facing jaw clutch.
  • This auxiliary member is simply a short piece of collar pipe which has an integral upwardly facing jaw clutch extending midway of its length and which is threaded on its upper and lower ends to permit attachment to the lower end of the collar by its upper end to any conventional bit attached at its lower end. Consequently, the inventive stabilizer members per se can be employed without requiring a specialized bit having the integral jaw clutch as discussed previously.
  • a second embodiment of the invention employs two pairs of cooperating split ring clamp members abutting against an inwardly extending annular rib medially positioned in the main sleeve member.
  • An upper cap sleeve and a lower cap sleeve each having jaw clutches at their outer ends serves to engage the clamp rings to effect a clamping of the stabilizer member to the collar at two different locations to provide increased resistance to axial movement of the stabilizer member on the collar.
  • the second embodiment is used in exactly the same manner as the first embodiment and is capable of being worked upon by a washover tool in exactly the same manner as discussed above with respect to the first embodiment.
  • FIG. l-A is a pictorial elevation of a bore hole illustrating the employment of the inventive stabilizer system in a normal drilling operation
  • FIG. 1-8 is similar to FIG. LA but illustrates the seizure of the lower end of the drill string by a cave-in of the surrounding formation with the initial step of a correcting washover operation being illustrated;
  • FIG. l-C is similar to FIG. 1-8 but illustrates a subsequent step in the washover operation of the inventive system
  • FIG. 2 is a side elevation partially in section of a bit and associated auxiliary clutch sub means employed in one aspect of the inventive system
  • FIG. 3 is a side elevation view of the preferred embodiment of the stabilizer means and supporting collar of the inventive system
  • FIG. 4 is a top plan view of the stabilizer of FIG. 3;
  • FIG. 5 is a sectional view taken along lines 55 of FIG. 3;
  • FIG. 6 is a sectional view taken along lines 66 of FIG. 5;
  • FIG. 7-A is an enlarged view of a portion of FIG. 5 illustrating the clamping means in a non-actuated condition
  • FIG. 7-B is similar to FIG. 7-A illustrating the clamping members in an actuated clamping condition
  • FIG. 8 is an exploded perspective view of the stabilizer member of FIG. 3;
  • FIG. 9 is an exploded perspective view of a second embodiment of the stabilizer means.
  • FIG. 10 is a bisecting sectional view of the embodiment of FIG. 9.
  • a rotary drill string 20 including a plurality of collar sections 22 suspended from drill pipe 24 is disclosed in association in a well-known manner.
  • a plurality of stabilizer members 26A, 26B, 26C etc. are provided on the collar section for engagement with the wall 28 of the well bore 29 and a drill bit 30 is mounted on the lower end of the collar section and includes an upwardly facing jaw clutch 32 formed integrally as a part of the drill head.
  • Each of the stabilizer members 26A etc. is formed of a rigid main sleeve 36 having a plurality of outwardly extending riblike blade or flange members 38 extending in a spiral manner from its outer surface and a downwardly facing jaw clutch 39.
  • Rigid main sleeve 36 also includes an axial passageway extending along its length including a larger portion 40 having threads 41 at its upper end and a lower smaller diameter portion 43 having an upper end termination comprising a radial shoulder 44 which serves a purpose to be described.
  • Clamping means is provided on the interior of the passageway extending through the main sleeve and comprises an internal split slip ring 46 having a single open slot 47 and outer surface 48 and an internal cylindrical surface 50 dimensioned to fit about the outer periphery of a collar section 22 as shown in FIG. 5.
  • An external split slip ring 52 having a single open slot 53 and a reverse configuration to that of ring 46 is provided adjacent ring 46 and has an inwardly facing tapered conical surface 54 contiguously engaging the conical outer surface 48 of the internal ring member 44.
  • the outer surface 56 of ring member 52 is cylindrical and dimensioned to engage the smooth surface of the large diameter portion of the axial passageway extending the length of the main sleeve member.
  • a clamping actuator in the form of an externally threaded cap sleeve 58 having threads 60 compatible with the threaded portion 40 of the internal passageway of the main sleeve 36 is received in the upper end of the main sleeve and includes an axial passageway 64 of sufficient size to easily slide over the collar pipe 22.
  • upwardly facing jaw clutch 66 is provided on the upper end of the cap sleeve 58 and is dimensioned and shaped to cooperate with the jaw clutch 39 integrally provided on the lower end of the main sleeve 36 of any other stabilizer.
  • the entire assembly is positioned on the collar section 22 and the main sleeve 36 rigidly held in position with cap sleeve 58 then being rotated to move axially downwardly within the confines of the main sleeve to move the split ring clamp members 46 and 52 from the position illustrated in FIG. 7-A toward the position illustrated in FIG. 7-B.
  • the foregoing movement results in inward movement of the inner cylindrical surface 50 of the split ring member 46 so that the surface is forcefully urged into clamping engagement with the outer surface 22 of the collar pipe section in an obvious manner. Consequently, the stabilizer can be fixed in position at any desired point along the length of the collar section.
  • FIGS. 9 and 10 the second embodiment of the invention will be discussed with it being initially noted that the second embodiment is closely similar to the first embodiment with the exception that two pairs of clamping rings are provided for achieving additional clamping engagement of the stabilizer on the collar in circumstances in which the stabilizer is likely to be subjected to additional forces which might tend to axially shift the stabilizer on the collar.
  • an elongated rigid main sleeve 70 with spiral blades 71 is provided with an axial passageway extending along its entire length and including a lower portion 72 of enlarged diameter and an upper portion 74 also of the same enlarged diameter.
  • the lower end of the large diameter portion 72 is threaded at 76 (FIG. 10) and the upper end of the portion 74 is similarly threaded at 78.
  • An inwardly extending annular rib 80 having a smaller internal diameter than the portions 72 and 74 is provided medially of the main sleeve and provides radial abutment shoulders 81 for upper split clamp ring members 46 and 48 identical to the same members discussed with respect to the first embodiment.
  • a pair of lower split, ring clamp members 46' and 48' are provided immediately adjacent the opposite sides of the annular rib 80 with ring 46' being in abutting engagement with lower shoulder '81.
  • all of the split ring clamp members comprising members 46 and 52 of the first embodiment and 46' and 48' of the second embodiment all extend circumferentially through an angle only slightly less than a complete circle and have only a single opening which permits radial flexure of the ring members.
  • the inner surfaces of the ring members 46 and 46' are the only elements actually contacting the collar in a forceful manner since the inner surface of annular rib 80 defines an opening of greater diameter than the outer diameter of the collar section 22.
  • An upper cap sleeve member 58 identical to the cap sleeve 58 of the first embodiment is provided in the upper end of the main sleeve in threaded connection with the sleeve in exactly the same manner as in the first embodiment.
  • a lower cap sleeve 58' is provided in the upper end of the main sleeve in threaded connection with the sleeve in exactly the same manner as in the first embodiment.
  • the drill pipe 24 supports a plurality of collar section members 22 with a plurality of stabilizer members 26A etc. being positioned along the drill collar section.
  • three stabilizer members are disclosed comprising an uppermost stabilizer 26A, a second uppermost stabilizer 26B and a lowennost stabilizer 26C.
  • FIG. LA the system is shown in normal operation and in FIG. l-B, the system is shown with the lower portion of the string being seized by a formation cavein in the area 100.
  • a washover tool 102 it is necessary to cut through the seized area by means of a washover tool 102 in a well-known manner.
  • the washover tool 102 would merely partially cut through the stabilizer member until such time as the clamping effect of the ring members 46 and 48 should be released at which time the stabilizer member would simply start to rotate with the washover tool and would move down the string.
  • the washover tool 102 Upon completion ofthe cutting operation through the entire length of the uppermost stabilizer 26A, the washover tool 102 immediately begins to cut the upper portion of the second uppermost stabilizer 268 in an obvious manner, and consequently releases the slip clamp ring members of the second uppermost stabilizer member so that it is then moved down over the collar section to engage the lowermost stabilizer member 26C as shown in FIG. 1 -C.) Engagement of the lower jaw clutch 39 on stabilizer 263 with the upwardly facing jaw clutch 66 of the lowermost stabilizer 26C prevents further rotation of stabilizer member 268 so that the washover tool can complete cutting through the stabilizer member 26B.
  • FIG. 2 illustrates an attachment which enables a conventional bit 30' not having a unitary jaw clutch to be used with the inventive stabilizer members.
  • a short collar type pipe section 110 having an integral jaw clutch section 112 medially of its length is threadably received on the lowermost end of the lowermost collar section 22.
  • the lower end of the member 110 is provided with a threaded opening 1 14 for receiving the mounting threads of the bit 30' in an obvious manner.
  • Jaw clutch portion 112 serves to engage the downwardly facing jaw clutch 39 of the lowermost stabilizer in a washout operation in exactly the same manner as jaw clutch 32 of the preferred embodiment.
  • This attachment is of particular utility in enabling the utilization of specialized drill bits not having an integral jaw clutch in the manner of bit 30 of the preferred embodiment.
  • each stabilizer would be provided with sets of four or more internal slip rings 46 and/or 46' of differing internal diameters so as to permit usage of the stabilizer on dull collars of differing outside diameter such as worn dull collars, factory reject drill collars or drill collars having eccentric wear.
  • a drill collar stabilizer comprising rigid main sleeve means, an axial passageway extending the entire length of said rigid main sleeve means and including an inwardly extending fixed abutment means medially of said passageway the innermost extent of which abutment means defines an opening of sufficient size to per mit said sleeve to be slidably received over a drill collar for axial movement along the drill collar, radially extending flange means extending outwardly of said sleeve means, clamping means positioned internally of said rigid main sleeve means adjacent said fixed abutment means and selectively operable for fixedly clamping said rigid main sleeve means to a collar over which said rigid main sleeve means is positioned and clamping actuator means mounted in said rigid main sleeve means for movement toward said fixed abutment means while engaging said clamping means for actuating said clamping means.
  • a drill collar stabilizer as recited in claim 1 additionally including internal main sleeve thread means in said axial passageway, and wherein said clamping actuator means includes threaded cap sleeve means having a threaded portion mating with said internal main sleeve thread means whereby rotation of said cap sleeve means in one direction with respect to said rigid main sleeve means effects axial movement of said cap sleeve means internally of the main sleeve means to effect compression of said clamping means while rotation of said threaded cap sleeve means in an opposite direction effects release of compression of said clamping means.
  • said inwardly extending fixedabutment means comprises an annular rib positioned'medially of 'said passageway
  • said internal main sleevethread means comprises first and second threaded portions of said passageway on opposite sides of said annular rib
  • said cap sleeve means comprises first and second threaded cap sleeves respectively received in said first and second threaded portions.
  • said clamping means comprises first and second pairs of overlying inner and outer split ring means each having a single opening and respectively positioned on opposite sides of said annular rib, one ring of each pair of split ring members engaging said annular rib with each pair of rings including abutting conical surfaces oriented so that axial movement of one split ring means of each pair relative to the other split ringmeans of the same pair results in clamping or unclamping movement of the inner split ring means of said pair or rings.
  • said clamping means comprises first and second overlying inner and outer split ring clamping means each having a single opening and one of which engages said fixed abutment means and including abutting conical surfaces oriented so that axial movement of one split ring means relative to the other split ring means results in clamping or unclamping movement of the inner split ring clamping means.
  • a drill collar stabilizer as recited in claim 5 additionally including internal main sleeve thread means in said axial passageway, and wherein said clamping actuator means includes threadedcap sleeve means having a threaded portion mating with said. internal main sleeve thread means whereby rotation of said cap sleeve means in one direction with respect to said rigid main sleeve means effects axial movement of said cap sleeve means internally of the main sleeve means to effect axial movement of one of said split ring means with respect to the other split ring means to cause clamping movement of the inner split ring means while rotation of said threaded cap sleeve means in an opposite direction effects unclamping movement of the inner split ring means.
  • a drilling system comprising a drill string having a bit at its lowerend, a plurality of stabilizer members spaced along the length of said drill string, each of said stabilizer members including clamping means clampingly engaging said stabilizer members at a desired location onthe drill string, each of said stabilizer members including an upwardly facing jaw clutch means and a downwardly facing jaw clutch means respectively positioned at the upper and lower ends of each stabilizer member, the upper jaw clutch means on each stabilizer member being compatible with and capable of mating engagement with the lower jaw clutch of each stabilizer member and an upwardly facing bit jaw clutch means associated with said bit below the lowermost stabilizer member and compatible and mateable withthe downwardly facing jaw clutch or the lowermost stabilizer so that operation of a washover tool can effect release of the clamping portion of the uppermost stabilizer memberfollowed by movement of the uppermost stabilizer member into fixed engagement with the next uppermost stabilizer member to effect cutting through of the uppermost stabilizer members and succeeding cutting in like manner of the remaining stabilizer members to effect release of the string in the event of seizing of
  • a method of providing optimum stabilization of a drill string and conducting a washover operation in the event of seizing of the string comprising the steps of providing a plurality of stabilizer members spaced along the length of a drill string having bit means at its lower end, actuating clamping means on each stabilizer member for clamping each stabilizer member at a desired location on the drill string, initiating movement of a washover tool down the string upon seizing upon the string to initially engage the uppermost stabilizer member'and cut the clamping means of the uppermost stabilizer member to release the clamping means holding the uppermost stabilizer member on the string, moving the uppermost stabilizer member down the string with the washover tool and engaging the lower end of the uppermost stabilizer member with the second uppermost stabilizer member to prevent further rotation of the uppermost stabilizer member, operating the washover tool to cut through remaining portions of the uppermost stabilizer member and then through the clamping means of the second uppermost stabilizer member to release the second uppermost stabilizer member from clamping engagement with the string, moving the second uppermost stabilizer member

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Marine Sciences & Fisheries (AREA)
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US521055A 1974-11-05 1974-11-05 Drilling stabilizer and method Expired - Lifetime US3916998A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US521055A US3916998A (en) 1974-11-05 1974-11-05 Drilling stabilizer and method
DE19752535588 DE2535588C3 (de) 1974-11-05 1975-08-08 Stabilisator für Schwerstangen, Tiefbohrvorrichtungen mit Stabilisatoren und Verfahren zum Freischneiden eines mit Stabilisatoren ausgerüsteten Tiefbohrgestänges
SE7509034A SE7509034L (sv) 1974-11-05 1975-08-12 Borrstabilisator och sett att astadkomma borrstabilisering
FR7525073A FR2290563A1 (fr) 1974-11-05 1975-08-12 Stabilisateur de tige de forage et son procede d'utilisation
BE159154A BE832373A (fr) 1974-11-05 1975-08-12 Stabilisateur de tige de forage et son procede d'utilisation
GB34880/75A GB1479255A (en) 1974-11-05 1975-08-22 Drilling stabilizer and method of use
NO752940A NO752940L (enrdf_load_stackoverflow) 1974-11-05 1975-08-27
DK385775A DK385775A (da) 1974-11-05 1975-08-27 Borestabilisator og fremgangsmade
JP50123324A JPS5165001A (enrdf_load_stackoverflow) 1974-11-05 1975-10-15
NL7512520A NL7512520A (nl) 1974-11-05 1975-10-27 Zwaarstangstabilisator.
BR7507107*A BR7507107A (pt) 1974-11-05 1975-10-29 Estabilizador de anel de perfuracao e processo para proporcionar uma estabilizacao otima

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US521055A US3916998A (en) 1974-11-05 1974-11-05 Drilling stabilizer and method

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US3916998A true US3916998A (en) 1975-11-04

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US521055A Expired - Lifetime US3916998A (en) 1974-11-05 1974-11-05 Drilling stabilizer and method

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US (1) US3916998A (enrdf_load_stackoverflow)
JP (1) JPS5165001A (enrdf_load_stackoverflow)
BE (1) BE832373A (enrdf_load_stackoverflow)
BR (1) BR7507107A (enrdf_load_stackoverflow)
DK (1) DK385775A (enrdf_load_stackoverflow)
FR (1) FR2290563A1 (enrdf_load_stackoverflow)
GB (1) GB1479255A (enrdf_load_stackoverflow)
NL (1) NL7512520A (enrdf_load_stackoverflow)
NO (1) NO752940L (enrdf_load_stackoverflow)
SE (1) SE7509034L (enrdf_load_stackoverflow)

Cited By (72)

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US4036539A (en) * 1975-05-09 1977-07-19 Saunders Leonard R Drill string system
US4059164A (en) * 1976-05-19 1977-11-22 Farris Ralph J Self-stabilizing drilling tool
US4101179A (en) * 1977-10-03 1978-07-18 Royal Tool Company, Inc. Drilling stabilizer including mechanical interlock device
US4105262A (en) * 1977-04-22 1978-08-08 Richey Vernon T Releasable drill string stabilizer
DE2836747A1 (de) * 1977-10-03 1979-04-05 Royal Tool Co Bohrstabilisator
US4258804A (en) * 1979-05-04 1981-03-31 Richey Vernon T Releasable drill string stabilizer
US4275935A (en) * 1979-07-17 1981-06-30 American Coldset Corp. Drilling stabilizer
US4384626A (en) * 1982-02-22 1983-05-24 Smith International, Inc. Clamp-on stabilizer
US4456080A (en) * 1980-09-19 1984-06-26 Holbert Don R Stabilizer method and apparatus for earth-boring operations
US4600063A (en) * 1984-05-29 1986-07-15 Dailey Petroleum Services Corp. Double-taper slip-on drill string stabilizer
US4630690A (en) * 1985-07-12 1986-12-23 Dailey Petroleum Services Corp. Spiralling tapered slip-on drill string stabilizer
US4635736A (en) * 1985-11-22 1987-01-13 Shirley Kirk R Drill steering apparatus
US4874045A (en) * 1988-12-27 1989-10-17 Clayton Charles H Straight hole drilling method and assembly
US4877092A (en) * 1988-04-15 1989-10-31 Teleco Oilfield Services Inc. Near bit offset stabilizer
US4997039A (en) * 1990-04-06 1991-03-05 Mcclung-Sable Partnership Rod centralizer
US5038872A (en) * 1990-06-11 1991-08-13 Shirley Kirk R Drill steering apparatus
US5095981A (en) * 1986-10-30 1992-03-17 Mikolajczyk Raymond F Casing centralizer
US5107943A (en) * 1990-10-15 1992-04-28 Penetrators, Inc. Method and apparatus for gravel packing of wells
US5327970A (en) * 1993-02-19 1994-07-12 Penetrator's, Inc. Method for gravel packing of wells
US5363931A (en) * 1993-07-07 1994-11-15 Schlumberger Technology Corporation Drilling stabilizer
US5474143A (en) * 1994-05-25 1995-12-12 Smith International Canada, Ltd. Drill bit reamer stabilizer
US5584342A (en) * 1995-06-06 1996-12-17 Ponder Industries, Inc. Subterranean rotation-inducing device and method
US5631563A (en) * 1994-12-20 1997-05-20 Schlumbreger Technology Corporation Resistivity antenna shield, wear band and stabilizer assembly for measuring-while-drilling tool
US20020032126A1 (en) * 2000-05-02 2002-03-14 Kusmer Daniel P. Borehole retention device
US20030106719A1 (en) * 2000-06-21 2003-06-12 Herrera Derek Frederick Centraliser
US6622803B2 (en) 2000-03-22 2003-09-23 Rotary Drilling Technology, Llc Stabilizer for use in a drill string
US6655477B2 (en) * 1995-08-30 2003-12-02 Drilltech Services (Asia) Pte Limited Friction-reducing drill pipe component
US20060207801A1 (en) * 2005-03-16 2006-09-21 Clayton Charley H Technique for drilling straight bore holes in the earth
US20080128175A1 (en) * 2006-12-04 2008-06-05 Radford Steven R Expandable reamers for earth boring applications
US20080128169A1 (en) * 2006-12-04 2008-06-05 Radford Steven R Restriction element trap for use with an actuation element of a downhole apparatus and method of use
US20080264629A1 (en) * 2007-04-24 2008-10-30 Frank's International, Inc. Field-Assemblable Bow-Spring Casing Centralizer and Method of Making A Centralizer
US20090025929A1 (en) * 2007-07-26 2009-01-29 Frank's International, Inc. Apparatus for and Method of Deploying a Centralizer Installed on an Expandable Casing String
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US20100224414A1 (en) * 2009-03-03 2010-09-09 Baker Hughes Incorporated Chip deflector on a blade of a downhole reamer and methods therefore
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US20130199858A1 (en) * 2011-11-21 2013-08-08 Sheldon Hansen Keyseat Wiper
US9297208B2 (en) * 2011-11-21 2016-03-29 Utah Valley University Ball and socket roller reamer and keyseat wiper
US20130126244A1 (en) * 2011-11-21 2013-05-23 Sheldon Hansen Ball and socket roller reamer and keyseat wiper
NO337229B1 (no) * 2012-07-12 2016-02-15 Ace Oil Tools As Festeanordning for ei rørstamme forsynt med ett eller flere aksielt utragende funksjonselement innrettet til anvendelse på et nedihulls rørlegeme, samt rørstreng omfattende flere rørlegemer
US9765576B2 (en) 2013-08-17 2017-09-19 Antelope Oil Tool & Mfg. Co. Wrap-around stop collar and method of forming
US9556687B2 (en) 2013-08-17 2017-01-31 Antelope Oil Tool & Mfg. Co. Multi-vane centralizer and method of forming
US9920412B2 (en) 2013-08-28 2018-03-20 Antelope Oil Tool & Mfg. Co. Chromium-free thermal spray composition, method, and apparatus
US11608552B2 (en) 2013-08-28 2023-03-21 Innovex Downhole Solutions, Inc. Chromium-free thermal spray composition, method, and apparatus
US10577685B2 (en) 2013-08-28 2020-03-03 Innovex Downhole Solutions, Inc. Chromium-free thermal spray composition, method, and apparatus
US9328603B2 (en) 2013-11-12 2016-05-03 Hunting Energy Services, Inc. Method and apparatus for protecting downhole components from shock and vibration
US11286727B2 (en) * 2016-11-18 2022-03-29 Modus Oilfield International Llc Multifunction wellbore conditioning tool
WO2019051378A1 (en) * 2017-09-09 2019-03-14 Extreme Technologies, Llc CONDITIONER AND STABILIZER FOR WELLBORE
US11111739B2 (en) 2017-09-09 2021-09-07 Extreme Technologies, Llc Well bore conditioner and stabilizer
US11408230B2 (en) * 2017-10-10 2022-08-09 Extreme Technologies, Llc Wellbore reaming systems and devices
CN110424903A (zh) * 2019-09-04 2019-11-08 高九华 钻头稳定双通道收排渣装置
US11286750B2 (en) * 2020-03-31 2022-03-29 Weatherford Technology Holdings, Llc Stop collar assembly
RU215132U1 (ru) * 2022-08-25 2022-11-30 Государственное бюджетное образовательное учреждение "Альметьевский государственный нефтяной институт" (ГБОУ ВО АГНИ) Центратор-турбулизатор для бурильных труб
NL2037425A (en) * 2023-05-15 2024-12-02 Halliburton Energy Services Inc Continuous contact radially phased centralizer
BE1031568B1 (de) * 2023-05-15 2025-02-19 Halliburton Energy Services Inc Radial abgestufter dauerkontaktzentrierer

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SE7509034L (sv) 1976-05-06
FR2290563A1 (fr) 1976-06-04
DE2535588B2 (de) 1977-04-28
GB1479255A (en) 1977-07-13
DE2535588A1 (de) 1976-05-06
FR2290563B3 (enrdf_load_stackoverflow) 1978-04-07
JPS5165001A (enrdf_load_stackoverflow) 1976-06-05
NL7512520A (nl) 1976-05-07
BE832373A (fr) 1975-12-01
BR7507107A (pt) 1976-08-10
NO752940L (enrdf_load_stackoverflow) 1976-05-06
DK385775A (da) 1976-05-06

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