GB1588849A - Creation of Inventions and Patents with Artificial Intelligence

GB1588849A – Latching apparatus
– Google Patents

GB1588849A – Latching apparatus
– Google Patents
Latching apparatus

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Publication number
GB1588849A

GB1588849A
GB53316/77A
GB5331677A
GB1588849A
GB 1588849 A
GB1588849 A
GB 1588849A
GB 53316/77 A
GB53316/77 A
GB 53316/77A
GB 5331677 A
GB5331677 A
GB 5331677A
GB 1588849 A
GB1588849 A
GB 1588849A
Authority
GB
United Kingdom
Prior art keywords
conduit
fluid
latch
pipe
finger
Prior art date
1976-12-22
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

Application number
GB53316/77A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

BJ Hughes Inc

Original Assignee
BJ Hughes Inc
Priority date (The priority date 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 date listed.)
1976-12-22
Filing date
1977-12-21
Publication date
1981-04-29

1977-12-21
Application filed by BJ Hughes Inc
filed
Critical
BJ Hughes Inc

1981-04-29
Publication of GB1588849A
publication
Critical
patent/GB1588849A/en

Status
Expired
legal-status
Critical
Current

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Classifications

E—FIXED CONSTRUCTIONS

E21—EARTH DRILLING; MINING

E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables

E21B19/14—Racks, ramps, troughs or bins, for holding the lengths of rod singly or connected; Handling between storage place and borehole

Description

(54) LATCHING APPARATUS
(71) We, BJ-HUGHEs INC., a corporation organized and existing under the laws of the State of Delaware, United States of
America, of 6505 Paramount Boulevard,
Long Beach, California, United States of
America, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention concerns latching apparatus comprising an hydraulically-actuated latch mechanism, such as that of a finger latch of a finger board assembly of pipe racking apparatus, and a latch actuation sensor.
In a drilling operation, when pipe lengths are withdrawn from a well, for example when removing the drill string to change a drill bit, the successively removed pipe lengths are usually moved by means of pipe racker apparatus to a storage location beside the well drilling derrick. The pipe racker apparatus may be, for example, similar to that described in the specification of our copending Patent Application 4253/76 (Serial
No. 1,542,341). The storage location conveniently comprises a finger board assembly of the construction described in U.S. Patent
No. 3,615,027 and comprising a finger board having a plurality of parallel, spaced-apart fingers each provided with a plurality of finger latches movable between open and closed positions to retain pipe lengths in storage positions between adjacent fingers.
Such a finger board may provide a large number of storage positions, each adapted to receive a pipe length, and it is not uncommon to have as many as 184 storage positions provided in this way on or adiacent to a well drilling platform. The latches may be either manually or automatically controlled. It is very important, however, that the functioning of each latch be monitored and, desirably, a signal indicating the condition of each latch is transmitted to a remote display available to a floor-level drilling operator.
Heretofore the individual actuation of each finger latch has in some cases been determined by means of a limit switch coupled to each latch. One can readily appreciate that the installation of, for example, 184 limit switches is a formidable task. Further, the proper operation of all the switches at any given time is doubtful because of the likelihood of mechanical or electrical failures. Another possible means of sensing actuation of the individual latches involves the use of a set of limit switches extending from the upper racker head of the pipe racker apparatus to sense actuation of the individual latches. Such a system would be quite cumbersome, however, because of the proximity of the racker head to the finger latches, the spacing being about seven feet.
According to one aspect of the present invention there is provided latching apparatus comprising an hydraulically-actuated latch mechanism and a latch actuation sensor, the said sensor comprising a pressure switch in a conduit in fluid communication with the hydraulic circuit of the latch mechanism and responsive to pressure changes in the conduit on completion of a latching or unlatching operation.
Such a sensor may conveniently be used for sensing the actuation of a finger latch of pipe racking apparatus. Thus, a further apparatus, comprising a fluid inlet manifold; aspect of the invention provides latching a valve for receiving a pressurized fluid from said fluid inlet manifold and controlling the actuation of a hydraulic cylinder; a latch mechanism actuated by said hydraulic cylinder for forming a quadrilateral opening in a pipe racking apparatus and thereby restraining a pipe within said quadrilateral opening from substantial movement; a fluid outlet manifold for receiving fluid from said hydraulic cylinder; and a latch actuation sensor which comprises a pressure switch for sensing a fluid pressure change in a conduit in fluid communication with said outlet manifold.
The present invention also includes within its scope a finger board assembly having at least one latching apparatus in accordance with the invention.
A preferred embodiment of the invention will be described by way of example with reference to the accompanying drawings, in which:
FIGURE 1 is a plan view of a portion of a finger board assembly of a pipe racking apparatus;
FIGURE 2 is a view of a well drilling derrick;
FIGURE 3 is a schematic diagram of a portion of control apparatus for finger latches of the finger board assembly;
FIGURE 4 is a view on an enlarged scale of a portion of the finger board assembly shown in Figure 1;
FIGURE 5 illustrates a latch and manifold assembly of the finger board assembly;
FIGURE 6 is a side view of the manifold assembly of Figure 5, illustrating also the mechanical components of a fluid pressure sensor switch; and
FIGURE 7 is a block diagram illustrating a portion of an automated sequence for removing a drill string from a well.
Referring to the drawings, Figure 1 shows a portion of a typical finger board assembly 20 of a pipe racking apparatus disposed within a well drilling derrick 101 shown in Figure 2. It should be noted that this finger board assembly 20 may be positioned at a considerable height in the well drilling derrick 101 and may be, for example, approximately 80 feet above a derrick platform located at or near ground level.
The finger board assembly 20 may be of the general construction described in U.S.
Patent No. 3,615,027, and comprises similar left hand and right hand sections 21 and 22, respectively, separated by a central opening 23. The assembly 20 includes a rear rail 24 extending across the rear of the combined finger board assembly 20. Extending across the right-hand finger board section 22 is an end rail 25, and extending inwardly therefrom is a front rail 26. The rails 24, 25, 26 and their respective counterparts in the left-hand section 21 of the finger board assembly 20 together comprise the framework for supporting the finger board sections, and are commonly referred to as a walk-around. The front rail 26 may have braces 27 and 28 for supporting the assembly.
Mounted on the end rail 25 are a series
of spaced-apart drill pipe racking fingers 31,
32, 33, 34, 35 and 36, and one or more drill collar racking fingers 37. These fingers are
mounted on their right-hand ends to extend horizontally toward the centre line across the derrick horizontally, and are spaced laterally from the front rail 26 to the drill collar finger 37 by a distance sufficient to
enable accommodation of the size of drill
pipe desired to be racked therein. The finger
37 is spaced from the rear rail 24 bv a
distance sufficient to enable accommodation
of the diameter of the drill collar desired to be racked therein. The space between the front rail 26 and the finger 31 is here shown at 38.This space 38 extends from the outer end of the finger to the base of the finger near the rail 25 and is of sufficient length to enable accommodation of a selected number of stands of pipe 62, the illustrated arrangement being able to accommodate 12 stands in space 38. The same holds true with respect to the remainder of the spaces between the fingers 32 to 36. The right-hand end of drill collar stand space 45 is shown as being closed by a gusset 39 which is preferably attached between the rear rail 24 and the drill collar finger 37 and extends horizontally outward a distance to provide a support and reinforcement for the assembly 20 and a stop for the first drill collar stand racked therein.
Each of the fingers 31 to 37 is provided with a series of twelve finger latches 41 movable between opened and closed positions and spaced apart a sufficient distance to enable accommodation between adjacent latches of a desired diameter of drill pipe.
The latches are indicated in their opened or raised positions at 42, for example, and in the closed position at 43. When the latches are in the opened position, pipe may be moved freely into and out of the openings between the fingers.
Rail 24 is similarly provided with a series of six drill collar latches 44, movable between opened and closed positions and extending for the length of the opening 45 at suitably spaced intervals to enable accomodation between adjacent latches of a drill collar of desired diameter. The drill collar latches are indicated closed at 46 and opened at 47 for a purpose similar to the opened and closed latches of the racking fingers above described.
The left-hand racking board section 21 is similarly provided with drill pipe fingers to accommodate drill pipe and a drill collar finger to accommodate drill collars. In general, these fingers are identical with the fingers 31 to 37 above described, and function in the same way.
Mounted on end rail 25, and also on the corresponding end rail (not shown) associated with the left-hand section 21 of finger board assembly 20, are a series of hydraulic manifolds 48 that form part of the control mechanism for the latches 41 and 44, one manifold being provided for the latches on each racking finger and a further manifold being provided for the latches 44 on rail 24.
Each manifold 48 has associated therewith a series of four-way valve and solenoid assemblies 65 (Figures 3, 5 and 6) each
adapted for controlling actuation of an associated latch, together with hydraulic lines leading to the latch-actuating mechanism and electrical connections leading to a con sole switch under control of a derrick man in the manual mode of operation, or, in the automated mode of operation, under the control of a general purpose digital computer and associated electrical apparatus collectively referred to as a system controller.
Further details of the manifolds 48 and associated components are given below.
The pipe racking apparatus further comprises racker means for moving pipe lengths and drill collars into or out of the finger board assembly 20. This racker means is of the construction described in the Specification of our co-pending Patent Application
No. 4253/76 (Serial No. 1,542,341), and includes a racker arm 49, mounted on a carriage 52 and having a racker head 50 with pipe-gripping claw means 51. Racker arm 49 is under either automatic control of a system controller such as that described in the Specification of our co-pending
Patent Application No. 4253/76 (Serial No.
1,542,341) or manual control and may be extended or retracted longitudinally. In addition, carriage 52 is mounted in a horizontal track 53 extending horizontally along the side of the derrick, a.nd means under either automated or manual control, are provided for moving the carriage 52 laterally in the track 53 from side to side of the derrick.
The details of the carriage 52, racker arm 49, racker head 50 and claw means 51 are not a part of the present invention and are shown in Figure 1 only for purposes of indicating the general arrangement of the pipe racking apparatus.
Although the precise details of the finger board assembly 20 may be constructed as disclosed in U.S. Patent No. 3,501,017, a brief explanation of the principal details of the finger board assembly 20 and hydraulic piping associated therewith will be given in order that the importance of determining the proper actuation of the respective finger latches will be more fully appreciated.
Referring now to Figure 4, there is illustrated a portion of the right-hand racker section 22 of the finger board assembly 20 shown in Figure 1. As will be noted, the illustrated drill pipe fingers 35 and 36 and the drill collar finger 37 each have a base plate 56 attached by welding or other means to the inner end thereof and are attached by means of bolts 54 to a vertical flange 55 on the inside of the end rail 25, a reinforcing angle iron 57 being attached between the body of each finger and the associated base plate 56, the fingers extending above and below the top and bottom of the end rail 25.
Referring now to Figure 5, each latch 41 and 44 is mounted in trunnions 58 for rotary movement between a horizontal or closed position and a vertical or opened position. For example, the latch 41 on the left of Figure 5 is shown in its horizontal or latched position and the latch 41 on the right of the Figure is shown in its opened position at 42, in which the latch 41 is vertical with respect to the top of the finger 36 on which it is mounted. Each latch is equipped with suitable means for coupling it to the rod of an associated hydraulic cylinder 60 which provides the motive force for operating each latch. As illustrated in
Figure 5, this coupling means may be, for example, a clevis 59 which couples to the rod of hydraulic cylinder 60 through an appropriate bolt.Reaction or extension of the rod into or out of the cylinder by providing hydraulic pressure to cylinder 60 will result in movement of latch 41 to a vertical or horizontal position. The latch is held in position so long as the fluid pressure in the cylinder acts to maintain the rod in its extended or retracted position. Accordingly, each finger and also rail 24 is provided with a series of hydraulic cylinders 60 extending vertically and mounted for rotary movement on a bracket 61 in a well-known manner.
Referring again to Figure 1, there is indicated as visible between each of the fingers of the finger board assembly 20, a series of upstanding base pipe rackers 64 which each comprise a hemispherical seat located on the derrick base or set back 102 (Figure 2) on which the lower end of a stand of drill pipe length is placed to align the stand properly in the assembly 20. In the illustrated arrangement the rackers 64 are positioned directly below associated racker sections in the finger board assembly 20 and the stand of pipe would thus be positioned vertically in such an arrangement.However, as a practical matter, these base rackers 64 may be offset from the vertical toward the adjacent side of the derrick, so that the bottom of the stand of drill pipe or drill collar will be moved back from the centre line of the derrick to allow more room around the well hole. Thus, the stands of pipe and the stands of drill collar will slant inwardly at their tops towards both centre lines of the derrick, placing additional weight on the fingers and latches of assembly 20 and thus increasing the necessity of having an accurate indication of latch actuation.
Were an indication of latch actuation received by the system controller when in fact the latch had not closed, the next step in the automated sequence, the opening of the racker claws 51 holding the drill pipe, would result in the pipe falling from the finger board assembly 20 and possibly causing damage to the well drilling derrick apparatus and/or injury to personnel working thereon.
Further, the derrick 101 may be utilized in an environment, such as on a well drilling ship, where motion of, for example, the ship causes the drill pipe lengths 62 and drill collars 63 to exert a force on the fingers and latches of assembly 20 and may thus cause enough movement of the latch to open slightly the contacts of a limit switch for sensing latch actuation and thereby generate a faulty signal.In both events, when operating the pipe racking apparatus in an automated mode, as described in the Specification of our co-pending Patent Application
No. 4253/76 (Serial No. 1,542,341), it is necessary to provide an accurate and reliable feedback signal from the finger board assembly 20 indicating to the system controller that a finger latch has closed and the racker may then be instructed to release the individual pipe stand and proceed to the well centre line for the racking of an additional pipe stand.
As previously mentioned, actuation of each of the latches 41 and 44 is controlled by an associated valve and solenoid assembly 65, a separate manifold 48 being associated with the series of asemblies 65 for each finger 31 to 37 and for rear rail 24. Referring to Figure 5, the manifold 48 for finger 36 is shown as mounted on the top of the end rail 25 and the associated valve and solenoid assemblies 65 are shown as being mounted adjacent to and on top of the manifold 48. The manifolds 48 may be any commonly available type, and do not per se form a part of this invention.
Referring now to Figure 6, each manifold 48 has a fluid inlet conduit 66 and a fluid outlet conduit 67, conduit 66 being attached to a source of fluid pressure and conduit 67 leading to a sump 78. These conduits 66 and 67 are in communication with the associated valve assemblies 65 through appropriate piping.
Adjacent manifold 48 is provided a conduit 91 through which electrical leads are brought from the system controller into a terminal box 90. From there the individual electrical connections are made to the solenoids for each valve assembly 65.
The hydraulic piping associated with the various solenoids, valves and latch assemblies is diagrammatically shown in Figure 3.
Thus referring to Figure 3, each of the valve assemblies 65 has an inlet conduit 66′ and an outlet conduit 68 leading, respectively, to the inlet conduit 66 and the outlet conduit 67 of the associated manifold 48 and two hydraulic conduits 92 and 93 connected to the hydraulic cylinder 60, as above described, of the associated latch means. Fluid pressure is always maintained on each valve assembly 65 from the common inlet conduit 66, and actuation of a valve assembly 65 to open the circuit to hydraulic conduit 93 will divert the pressure from line 66l into conduit 93 and thus into the upper, rod end of the associated cylinder 60. At the same time, the valve assembly 65 will open the fluid circuit in conduit 68 to dump fluid pressure therein to the fluid outlet conduit 67 and return the excess fluid to the sump 78.
Reversal of the valve by means of the solenoid arrangement will place the hydraulic fluid pressure from conduit 661 into the hydraulic conduit 92 and relieve the pressure in the conduit 68, forcing the piston of the cylinder 60 towards the upper, rod end thereof, thus extending the rod and lowering the associated latch 41. Each latch 41 or 44 may be similarly operated by reversing the flow of operating fluid in the conduit serving the latch.
The outlet conduit 68 associated with each valve 65 always serves to receive and transmit fluid to the fluid outlet conduit 67 of the associated manifold 48, the fluid outlet conduit 67 communicating directly with a further conduit 72. Conduit 72 serves as a fluid communicating conduit to transmit changes in flow or pressure in the fluid in fluid outlet conduit 67 to a flow sensing apparatus 74 associated with the particular finger 31 to 37 and comprising an orifice valve 75 and a pressure switch 73 which may be adjustable over a range of pressure.
The conduit 72 serves to conduct fluid to sump 78 via a conduit 76 and a back pressure check valve 77. A fill conduit 79 and associated fill valve 94, e.g. an adjustable orificed valve, leads from inlet conduit 66 to conduit 72.
Fluid directed to fluid outlet conduit 67 of manifold 48 is thereby communicated to the flow sensing apparatus 74 through conduit 72, orifices 75 being appropriately sized to provide a momentary pressure increase in conduit 72 and thus cause a pressure increase of somewhat extended duration to be communicated to pressure switch 73 through conduit 80, causing a feedback signal to be generated to the system controller. The hydraulic fluid then drains through conduit 76 and check valve 77 into sump 78, the check valve 77 being provided to maintain a certain minimum fluid pressure in conduit 72 and to prevent the introduction of air or other contaminants into the conduit system.
As previously mentioned, the finger board assembly 20 may be located at some distance, for example up to approximating 80 feet, above the base of the drilling derrick 101. In those applications where the finger board assembly 20 is at a considerable height in the well drilling derrick 101, and consequently the fluid conduits are of considerable length, it may be necessary to provide the fill conduit 79 and fill valve 94 connecting fluid inlet conduit 66 to conduit 72 so as to maintain a supply of fluid in the conduits and prevent air or other contaminants from entering therein and interfering with the operation of pressure switch 73.For example, if the hydraulic fluid were to leak from conduit 80, actuation of a finger latch 41 and channeling of fluid into fluid outlet conduit 67 would cause compression of the air in conduit 80, as opposed to compression of the fluid actuating pressure switch 73, thereby resulting in no signal being generated to the control system.
The pipe handling sequence may be operated in a semi-automated mode of operation as disclosed in U.S. Patent 3,501,017, or in an automated mode, as disclosed in the
Specification of our co-pending Patent Application No. 4253/76 (Serial No. 1,542,341).
If it is desired to move a latch 41 or 44 to the opened position for receiving a pipe stand or drill collar, the spool of hydraulic valve 65 will be caused to move in a direction to align conduit 93 with conduit 66, thereby causing rod 82 of hydraulic cylinder 60 to move in a downward direction so as to direct latch 41 to the open position. Of course, conduit 92 will at the same time be aligned with valve outlet conduit 68 and thereby communicate an increase in fluid pressure to fluid outlet conduit 72 and cause operation of the sensing apparatus 74, as will be described below.
So as to facilitate understanding of the complete operating sequence associated with moving pipe in and out of the finger board assembly, reference is now made to Figure 7 wherein there is shown in block diagram form the typical sequence of steps of automated removal of a pipe from a well to enable, for instance, a bit to be changed or another maintenance operation to be carried out. The sequence illustrated is not intended to be complete, but is a portion of the complete sequence illustrated in the Specification of our co-pending Application No. 4253/76 (Serial No. 1,542,341). As indicated at block 83, the rackers associated with one or more pipe moving means move to the well centre line. where the claws, such as that illustrated in Figure 2 at 51, grip a pipe stand, for example pipe stand 89 of Figure 2.After the lower tool joint is broken (block 84), the stand 89 is lifted out of the box (or the next lower pipe stand 95), represented by block 85, and the rackers are synchronously driven to the selected row and column position within finger board assembly 20, indicated at block 86. A lifting mechanism then lowers the stand onto the base or set back 102, (block 87), and the appropriate finger latch is actuated to move from its opened position to its closed position thus forming a quadrilateral opening for containing the stand and locking the stand in place (block 88). As indicated in block 89, the claws then open and release the pipe, and the rackers return to standby (block 90).The inherent danger to workmen and apparatus if an accurate feedback signal positively indicating operation of the finger latch and consequently locking of the stand in its proper position is not received by the controller prior to the claws opening and releasing the pipe stand can be readily appreciated.
It is to be understood that one or more latches 41 and 44 may be actuated at any given time. The following explanation will be with reference to but one latch, although the feedback signal will operate similarly no matter how many latches are actuated at a given command, for example automatic controller apparatus.
Referring now to Figures 3, 5 and 6, actuation, e.g. closure, of latch 41 is accomplished, as previously mentioned, by generating an appropriate electrical signal to the desired finger and latch through terminal box 90 of the appropriate manifold 48. The signal is then transmitted to the valve and solenoid assembly 65, corresponding to the latch 41, causing movement of the spool of the valve to the position in which conduit 66′ and conduit 92 are in fluid communication. Pressurized fluid appearing at the inlet to valve 65, that is in conduit 661 is thus directed to hydraulic cylinder 60 through conduit 92, causing movement of plunger 82 and thereby closing latch 41. Concurrently with movement of plunger 82 of hydraulic cylinder 60, fluid is directed from cylinder 60 through conduit 93 and thence into conduit 72 via conduits 68 and 67.The pressure rise in conduit 72 is communicated to flow sensing apparatus 74, as described above, thereby causing switch 73 to actuate and generate an electrical signal that is directed to the system controller confirming latch actuation in the particular finger associated with flow sensing apparatus 74. In the preferred embodiment of this invention, a pressure switch 73 which functions upon sensing both a pressure increase and decrease, i.e.
a fluid pressure pulse, is employed. In operation, the fluid pressure in conduit 67 will rise to approximately 100–150 psi above ambient pressure upon actuation of latch 41, then, after movement of the latch ceases, will decrease slowly to return to the ambient pressure. Only upon the switch 73 of the preferred construction sensing this pressure decrease will the appropriate signal be generated indicating latch actuation. It will be readily appreciated that if a switch 73 was used that generated a signal on sensing a pressure rise only, then in the event that latch movement was impeded by, for example, an improperly placed drill pipe length, such a switch could sense a pressure rise and generate a signal indicating latch actuation even though in fact, the latch had only partially moved leaving fluid pressure on the hydraulic cylinder 60 and an improperly functioning latch.

Claims (10)

WHAT WE CLAIM IS:-

1. Latching apparatus comprising an hydraulically-actuated latch mechanism and a latch actuation sensor, the said sensor comprising a pressure switch in a conduit in fluid communication with the hydraulic circuit of the latch mechanism and responsive to pressure changes in the conduit on completion of a latching or unlatching operation.

2. Latching apparatus comprising a fluid inlet manifold; a valve for receiving a pressurized fluid from said fluid inlet manifold and controlling the actuation of a hydraulic cylinder; a latch mechanism actuated by said hydraulic cylinder for forming a quadrilateral opening in a pipe racking apparatus and thereby restraining a pipe within said quadrilateral opening from substantial movement; a fluid outlet manifold for receiving fluid from said hydraulic cylinder; and a latch actuation sensor which comprises a pressure switch for sensing a fluid pressure change in a conduit in fluid communication with said outlet manifold.

3. Apparatus according to claim 1 or 2, wherein the pressure switch is responsive to a fluid pressure pulse.

4. Apparatus according to claim 1, 2 or 3, including an orifice valve in said conduit for maintaining fluid pressure in said conduit.

5. Apparatus according to claim 4, including a check valve downstream of said orifice valve for maintaining fluid pressure upstream thereof.

6. Apparatus according to claim 5, further including a sump for receiving fluid from said check valve.

7. Apparatus according to any one of the preceding claims, including a fill valve for providing a continuous supply of pressurized fluid to said conduit.

8. Latching apparatus substantially as described with reference to and as shown in the accompanying drawings.

9. A finger board assembly having at least one latching apparatus in accordance with any one of the preceding claims.

10. A finger board assembly, substantially as described with reference to and as shown in the accompanying drawings.

GB53316/77A
1976-12-22
1977-12-21
Latching apparatus

Expired

GB1588849A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

US75358776A

1976-12-22
1976-12-22

Publications (1)

Publication Number
Publication Date

GB1588849A
true

GB1588849A
(en)

1981-04-29

Family
ID=25031295
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB53316/77A
Expired

GB1588849A
(en)

1976-12-22
1977-12-21
Latching apparatus

Country Status (10)

Country
Link

JP
(1)

JPS5378902A
(en)

AT
(1)

AT356040B
(en)

CA
(1)

CA1077918A
(en)

DE
(1)

DE2755227A1
(en)

DK
(1)

DK576177A
(en)

FR
(1)

FR2375430A1
(en)

GB
(1)

GB1588849A
(en)

IT
(1)

IT1090694B
(en)

NL
(1)

NL7713162A
(en)

NO
(1)

NO774103L
(en)

Cited By (10)

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Publication number
Priority date
Publication date
Assignee
Title

DE10123116A1
(en)

2001-05-04
2002-11-07
Bentec Gmbh Drilling & Oilfield Systems
Platform, used in drilling device for crude oil, natural gas and water exploration, comprises fingers and base frame with one finger parallel to longitudinal axis of frame

WO2009082197A3
(en)

2007-12-20
2009-09-03
Itrec B.V.
A tubulars storage device

US20120038486A1
(en)

2010-07-19
2012-02-16
Duncan Sinclair
Fingerboard Latch Detection System

WO2012110704A1
(en)

2011-02-18
2012-08-23
Sandvik Mining And Construction Oy
Control equipment for controlling drill rod

CN102913151A
(en)

2011-08-05
2013-02-06
因文西斯系统公司
Offshore drilling rig fingerboard latch position indication

US20160076920A1
(en)

2014-09-17
2016-03-17
Salunda Limited
Sensor for a Fingerboard Latch Assembly

CN108716373A
(en)

2018-04-26
2018-10-30
宝鸡石油机械有限责任公司
A kind of bogie of four single upright columns minor diameter bar

US10240408B2
(en)

2016-07-05
2019-03-26
Salunda Limited
Sensor for a fingerboard latch assembly

NL2020707B1
(en)

2018-04-03
2019-10-10
Rolloos Holding B V
Latch Monitoring System

US11402205B2
(en)

2016-11-09
2022-08-02
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Sensor for a rotatable element

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Publication number
Priority date
Publication date
Assignee
Title

NO156700C
(en)

1985-05-28
1987-11-04
Kjell Haughom

DEVICE FOR A RUDGER MANAGER.

WO2007143842A1
(en)

2006-06-14
2007-12-21
Roboweld Inc.
Systems and methods for autonomous tripping of oil well pipes

CN102747955B
(en)

2012-07-23
2014-09-17
杭州电子科技大学
Novel deep-sea automatic extension rod drilling machine for maintaining pressure and sampling and use method of novel deep-sea automatic extension rod drilling machine

1977

1977-11-01
CA
CA289,969A
patent/CA1077918A/en
not_active
Expired

1977-11-25
JP
JP14083577A
patent/JPS5378902A/en
active
Pending

1977-11-29
NL
NL7713162A
patent/NL7713162A/en
not_active
Application Discontinuation

1977-11-30
NO
NO774103A
patent/NO774103L/en
unknown

1977-12-07
AT
AT878577A
patent/AT356040B/en
not_active
IP Right Cessation

1977-12-10
DE
DE19772755227
patent/DE2755227A1/en
not_active
Withdrawn

1977-12-20
IT
IT52287/77A
patent/IT1090694B/en
active

1977-12-20
FR
FR7739377A
patent/FR2375430A1/en
active
Pending

1977-12-21
GB
GB53316/77A
patent/GB1588849A/en
not_active
Expired

1977-12-22
DK
DK576177A
patent/DK576177A/en
unknown

Cited By (23)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

DE10123116A1
(en)

CN101932790B
(en)

2007-12-20
2013-06-12
伊特雷科公司
A tubulars storage device

WO2009082197A3
(en)

2007-12-20
2009-09-03
Itrec B.V.
A tubulars storage device

US8631949B2
(en)

2007-12-20
2014-01-21
Itrec B.V.
Tubulars storage device

US20120038486A1
(en)

2010-07-19
2012-02-16
Duncan Sinclair
Fingerboard Latch Detection System

EP2675986A4
(en)

2011-02-18
2016-04-20
Sandvik Mining & Constr Oy
Control equipment for controlling drill rod

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Also Published As

Publication number
Publication date

CA1077918A
(en)

1980-05-20

NO774103L
(en)

1978-06-23

ATA878577A
(en)

1979-09-15

IT1090694B
(en)

1985-06-26

FR2375430A1
(en)

1978-07-21

NL7713162A
(en)

1978-06-26

AT356040B
(en)

1980-04-10

DE2755227A1
(en)

1978-06-29

JPS5378902A
(en)

1978-07-12

DK576177A
(en)

1978-06-23

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