CA1169627A - Drilling rig mast apparatus - Google Patents
Drilling rig mast apparatusInfo
- Publication number
- CA1169627A CA1169627A CA000393830A CA393830A CA1169627A CA 1169627 A CA1169627 A CA 1169627A CA 000393830 A CA000393830 A CA 000393830A CA 393830 A CA393830 A CA 393830A CA 1169627 A CA1169627 A CA 1169627A
- Authority
- CA
- Canada
- Prior art keywords
- mast
- pulley
- top drive
- hose
- hydraulic cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000630 rising effect 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/084—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with flexible drawing means, e.g. cables
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
ABSTRACT
A hose management system for a drilling rig top drive which retains the top drive flexible hoses in a taut and controlled configuration. A movable hose reel located above the top drive is moved in the same direction as the top drive, but over one-half the distance and at one-half the speed. The top drive hoses, being looped over and carried by the hose reel are thereby controlled, greatly reducing wear and tear of the hoses.
A hose management system for a drilling rig top drive which retains the top drive flexible hoses in a taut and controlled configuration. A movable hose reel located above the top drive is moved in the same direction as the top drive, but over one-half the distance and at one-half the speed. The top drive hoses, being looped over and carried by the hose reel are thereby controlled, greatly reducing wear and tear of the hoses.
Description
1 1 69~27 01 This invention relates to drilling rigs and 02 particularly to means for moving the top drive and ancillary 03 apparatus of the top drive.
~4 A drilling rig, particularly a portable drilling rig 05 i~ Llsually comprised of a mast and a top drive which rotates and 06 drives drilling pipe to which an auger or a bit is attached into 07 the ground. The top drive slides along mast guides and is 08 usually connected to one or a pair of chains which moves along 09 the mast. A long hydraulic cylinder drives the top drive up and down along the guides. Maximum hydraulic pressure is usually 11 required to draw the top drive up, since the weight of the pipe 12 usually aids the downward drilling pressure required. As the top 13 drive is driven downward, the pipe is rotated and is driven into 14 the ground.
Hydraulic fluid pressure is required at the top drive 16 to rotate the pipe holder. In addition, a supply of drilling 17 mud, and sometimes water must be provided to the top drive for 18 transmission through the center of the pipe to the bottom of the 19 hole. These fluids are supplied via flexible hoses; for example there are sometimes five flexible hoses connected to the top 21 drive.
22 The travel distance of the top drive down or up the 23 portable drilling rig masts sometimes is as great as 40 or 45 24 feet. Clearly the hoses must be flexible, and management of the hoses has posed a difficult problem.
26 The hoses can be looped over a support attached to the 27 top drive, and the slack looped down. As the top drive is 28 lowered toward the ground, the slack is increased. However with 29 larger drilling rigs having greater mast heights, increased drilling pressure requirements and increased mud and water supply 31 requirements, there is a substantial slack management problem.
32 If the slack is confined within the mast, the result of 33 confinement in the narrow space is chaffing and cracking of the 34 hoses, resulting in breakdowns in the field and subsequent loss of drilling time and money, as well as equipment replacement 36 cost.
37 The present invention is directed to a structure which 38 not only provides lifting and lowering force to the top drive, .~.
., .
01 but also manages the hoses at the same time. The hoses are 02 carried on a movable reel carried on the mast above the top 03 drive. The hoses are looped over the reel. The hose reel is 04 linked to the top drive so as the top drive moves up and down the 05 mast, the hose reel moves one-half the distance, thus effectively 06 keeping the hoses taut and managed.
07 More particularly, the invention is a drilling rig 08 comprising a mast, a top drive mounted for movement along the 09 mast, a hose reel mounted for move~ment along the mast, a hose connected to the top drive looped over the hose reel to a fixed 11 position relative to the mast, a driving apparatus for driving 12 the top drive along the mast, and a driving apparatus for driving 13 the hose reel along the mast at a rate sufficient to take up or 14 pay out hose slack as the top drive is moved.
According to a preferred embodiment of the invention 16 the hose reel is mounted above the top drive for movement along 17 the mast, and the hose is looped over the hose reel. The hose 18 reel is moved along the mast one-half the distance as the top 19 drive in the same direction and at the same time as the top drive.
21 Embodiments of the invention will now be described with 22 reference to the following drawings, in which:
23 Figure 1 is a side view of a portable drilling rig of 24 the kind with which the present invention can be used, Figure 2 is a schematic, perspective and partly phantom 26 view of a structure of a mast mechanism according to one 27 embodiment of the invention, 28 Figure 3 is a schematic perspective and partly phantom 29 view of a hoisting and lowering mechanism for the top drive according to a second embodiment of the invention, and 31 Figure 3a is a schematic, perspective and partly 32 phantom view of the upper portion of the embodiment shown 33 in Figure 3, illustrating the hose reel portion of the present 34 invention.
Turning now to Figure l, a side view of a portable 36 drilling rig is shown. The rig is comprised of a mast 1 which is 37 mounted at a hinged axis 2 to a truck 3. Mounted and 38 unreferenced at the rear of the truck typically is a mud pump, a 1 ~ 69~7 01 hydraulic fluid pump or providing rotational pressure to a top 02 drive, etc.
03 A top drive 4 is mounted along guides on the mast 1 04 whereby it can be driven down and pulled up. A plurality of 05 hoses 5 are connected from the top drive 4 to the mud pump, 06 hyclraulic pressure pump, etc., mounted on the back of the truck.
07 A hydraulic cylinder 6 is linked between the rear of the truck 08 and the mast 5, and the rear of the truck (and sometimes the 09 front of the truck) is braced against the ground by means of jack 7. A carrier frame 8 located adjacent the rear of the cab or 11 elsewhere at a convenient support location on the truck frame is 12 mounted at approximately the same height as the hinge axis 2.
13 In operation, the mast 1 is carried in a horizontal 14 position, supported along the hinge axis 2 and by the carrier frame 8 during transportation to the drilling site. The jacks 7 16 are lowered, bracking the truck, and hydraulic cylinder 6 is then 17 extended, which causes the mast 1 to become raised to a vertical 18 position. The hoses 5, which had been folded during 19 transportation to the site, are partly extended.
The top drive is raised to the height of a drilling 21 pipe. One end of a length of drilling pipe is attached to the 22 top drive, and a hydraulic cylinder contained within the mast 23 exerts downward force against the top drive. At the same time 24 the hydraulic pump on the back of the truck provides hydraulic pressure to the top drive via hoses 5, causing rotation of the 26 pipe. A bit or auger at the bottom of the pipe causes the pipe 27 to drill into the ground. When the pipe has been extended into 28 the ground, the top drive is raised again, and a second pipe is 29 attached thereto, its bottom being attached to the top of the pipe already in the ground. In this manner a hole hundreds or 31 thousands of feet deep may be drilled, using series of 32 interconnected pipes.
33 Similarly, when the pipes must be retracted, e.g. to 34 change the bit, remove cuttings, or remove cores, the top drive is moved up the mast, and a pipe is removed, the top drive is 36 moved to the bottom of the mast, where i-t is connected to the top 37 of the next pipe extending from the ground, and the top drive is 38 moved up the mast and the next pipe is removed. Clearly the top 01 drive must move up and down the mast continuously as the drilling 02 takes place. Clearly the hoses must flex continuously as the top 03 drive moves up and down the mast.
04 Figure 2 illustrates one embodiment of the invention in 05 schematic form. The mast itself is not shown, except as an open 06 frame 11, for purposes of clarity of illustration. The top drive 07 12 of well known form is mounted for guided movement along the 08 mast using conventional techniques.
09 According to this embodiment, a hydraulic cylinder 13 has one end mounted conventionally at the top of the mast, and 11 extends downward along the axis of the mast. However, instead of 12 the other end of the hydraulic cyhlinder being connected directly 13 to the top drive, a pulley carrier 14 is mounted at the other end 14 of the hydraulic cylinder. A pair of pulleys 15 and 16 are mounted for rotation about a horizontal axis to the pulley 16 carrier, pulley 15 being mounted directly above pulley 16. A
17 cable 17 has one end fixed to the bottom of the mast at position 18 18, is looped around the top of pulley 16 and is further looped 19 around the bottom of a pulley 19 which is mounted for rotation about a horizontal axis adjacent the bottom of the ma~t. The 21 other end of cable 17 is fixed to top drive 12 at position 20.
22 Another pulley 21 is mounted approximately mid-way 23 between the top and bottom of the mast, for rotation about a 24 horizontal axis. A second cable 22 is fixed to the side or bottom of the mast, is looped over the top of pulley 21, around 26 the bottom of pulley 15, and over the top of a pulley 23 which is 27 fixed at the top of the mast for rotation about a horizontal 28 axis. Cable 22, after passing over the top of pulley 23 is fixed 29 to top drive 12 (at a position not shown).
In order to accommodate cables 17 and 22, pulley 31 carrier 14 should have a pair of slots 24 extending along its 32 sides adjacent the edges of pulleys 15 and 16 from top to bottom, 33 to facilitate no interference between the pulley carrier and 34 cables 17 and 24.
At least one, but preferably two pulleys 25 are fixed 36 at the top of the mast, spaced in a single plane. A hose reel 27 37 is fixed for rotation about a horizontal axis to a movable reel 38 carrier 28. The reel carrier is carried within conventionally 1 i &~B27 01 const:ructed vertical guides fixed to the sides of mast 1. A
02 cablf~ 26 has one end fixed at position 29 to the pulley carrier 03 14, passes around pulley 25 and its other end is fixed to reel 04 carrier 28 at position 30, preferably by adjustment bolts which 05 can lengthen or shorten cable 26.
06 Preferably, but not necessarily, a further cable 31 is 07 fixed to top drive 12 at position 32, passes around a pulley 33 08 which is fixed for rotation about a horizontal axis to reel 09 carrier 38, and is connected to the side or bottom of the mast at position 34.
11 In order to lower the mast, hydraulic pressure is 12 applied to hydraulic cylinder 13, which extends in response.
13 This causes the pulley carrier block 14 to lower. As a result 14 the length of cable 17 between position 18, pulley 16 and pulley 19 decreases, and the length of cable 17 between pulley 19 and 16 top drive 12 increases.
17 At the same time, the length of cable between pulley 18 21, pulley 15 and pulley 23 increases. The increased cable 19 length is taken from the length betweeen top drive 12 and pulley 23, which shortens. Accordingly, tension is exerted in pulley 21 22, which causes top drive 12 to rise.
22 Similarly, as hydraulic cylinder 13 contracts, the 23 length of cable 17 between position 18, pulley 16 and pulley 19 24 increases, shortening the cable between pulley 19 and top drive 12. Tension is exerted in cable 17, pulling top drive down. At 26 the same time the length of cable 22 between pulley 21, pulley 15 27 and pulley 23 decreases due to the pulley carrier block 14 28 rising, which lengthens the cable between carrier 23 and top 29 drive 12, providing the slack which allows top drive 12 to lower due to tension in cable 17.
31 Clearly as pulley carrier drive 14 lowers, top drive 12 32 rises twice the distance (and at twice the rate). Similarly as 33 pulley carrier 14 rises, top drive 12 lowers twice the distance 34 (and at twice the rate).
As pulley carrier block 14 lowers, causing top drive 12 36 to rise, tension is exerted in cable 26. This is transla~ed to 37 reel carrier 28, which rises. However the reel carrier rises at the 38 same rate and over a similar distance as pulley carrier block 14.
116~
01 A plurality of hoses 35 for the top drive are looped 02 over hose reel 27, and are fixed to the mast by one or a 03 plurality of clamps 36 at about the midway position between the 04 top and bottom of the mast, and extend lower along the mast.
05 As top drive 12 rises, since hose 35 is looped over 06 hose reel 27, the amount of slack hose which is generated is only 07 about one-half the displacement of top drive 12. Since reel 08 carrier 28 moves the same distance as pulley carrier block 14, 09 which is one-half the displacement of top drive 12, the slack hose is effectively and precisely taken up.
11 Similarly as top drive 12 moves downward, it requires 12 an additional supply of hose. This is provided by reel carrier 13 28 moving downward one-half the distance that top drive 12 moves 14 downward, the distance moved by reel carrier 28 being controlled by the pulley carrier block 14 moving upward. The precise amount 16 of hose required by the downward movement in the top drive is 17 thus effectively provided.
18 Cable 31 provides support for top drive 12 as it is 19 moved up or down, via a pulley 33 mounted on reel carrier 28.
The amount of cable required to accommodate the displacement of 21 top drive 12 i8 provided by the displacement of reel carrier 28.
22 Pulley 21 is optional, and it can be deleted if the 23 associated end of cable 22 is fixed to a position on mast 1 which 24 is as high or is higher than pulley 21.
It has been found desirable to position hose reel 27 26 outside and alongside the mast, the hoses passing in parallel 27 over the reel, and being connected to the top drive in front of 28 the mast.
29 The structure described above has been found to be an effective means for transmitting pressure gainst the top drive 12 31 along the mast by hydraulic cylinder 13, while the hoses are Xept 32 taut and well managed, and has been found to substantially reduce 33 the incidence of tangling, cracking, chafing, etc. encountered 34 with prior art structures.
A second embodiment of the invention is shown in 36 Figures 3 and 3a.
37 Turning to Figure 3, a schematic perspective and partly 38 phantom view of the lifting mechanism is illustrated. A mast 1 ~ 69627 01 frame 40 (shown shortened for illustration purposes) supports a 02 pulley carrier 41 mounted for guided movement upward and downward 03 along the mast, using conventional construction techniques. One 04 or a pair (as shown) of hydraulic cylinders 42 are linked to the 05 bottom of the mast frame 40, having their other ends bearing 06 upwardly against and preferably linked to a bottom of pulley 07 carrier 41, within the mast. Accordingly as hydraulic cylinders 08 42 extend or contract, pulley carrier 41 moves up or down the 09 mast.
A top drive 43 is also mounted within vertical guides 11 fixed to mast frame 40. For illustration purposes, one form of 12 such guides is shown. A pair of channels 44, extending 13 vertically along opposite sides of top drive 43 have beams 45 14 (only one of which is shown) fixed to the mast and fitted therein. The beams 45 retain top drive 43 for vertical 16 movement in one plane, allowing it to slide up and down via 17 channels 44.
18 A pair of toothed lifting wheels 46 are mounted 19 opposite each other for rotation on pulley carrier 41, along a single ~orizontal axis about which both can rotate. Chains 47 21 are linked to top of top drive 43, pass around the corresponding 22 lifting pulleys, and are connected either directly or via straps 23 48 to the bottom of the mast frame 40.
24 Another pair of pulleys 48 are mounted along a single horizontal axis about which they both rotate, to pulley carrier 26 41. A further pair of pulleys 49 are mounted for rotation about 27 a horizontal axis to fixed positions at the top of mast frame 28 40. Preferably two pairs of pulleys 50 and 51 are mounted for 29 horizontal rotation at the bottom of mast frame 40, one set of pulleys 50 and 51 being spaced in a single plane opposite a 31 second set of pulleys 50 and 51 mounted in another single plane.
32 A pair of cables 52 are fixed to the top of the mast 33 frame 40 with one of each at position 53 (preferably through 34 cable adjustirrg bolts). The cables pass under pulleys 48, over pulleys 49, under pulleys 50 and 51, and are connected to the 36 bottom of top drive 43 at positions 54.
37 In operation of the top drive movement mechanism, to 38 raise top drive 43, hydraulic cylinders 42 are caused to expand.
lJ6~27 01 Pulley carrier 41 is forced upward, and since chains 47 are fixea 02 at one end to -the bottom of mast frame 40, as pulley carrier 41 03 rises, the portion of chain 47 between pulley 46 and the top 04 drive is shortened, causing rotation of lifting pulleys 46. With 05 the shortening of this portion of the chain, top drive 43 is 06 caused to rise.
07 At the same time, tension is exerted from top drive 43 08 on cable 52. As pulley 48 rises with pulley carrier 41, 09 additional slack in cable 52 is provided which allows top drive 43 to rise.
11 In order to lower top drive 43, hydraulic cylinders 42 12 are caused to contract. This causes pulley carrier 41 to lower.
13 The length of the portion of each cable 52 between position 53, 14 pulley 48, and pulley 49 is increased, and the increased cable length is obtained by tension being exerted along the remaining 16 cable passing around pulleys 50 and 51 to top drive 54. Top 17 drive 43 is thus caused to lower, and slack in chains 47 is 18 provided by pulley carrier 41 lowering.
19 It will be evident that top drive 43 moves upward or downward twice the distance moved by pulley carrier 41.
21 Turning now to Figure 3a, additional apparatus 22 associated with top drive 43 is shown. Hose reels 54-58 are 23 mounted for rotation about a horizontal axis, on pulley carrier 24 41. Large hose reels 54, 55 and 56 are mounted for rotation about a common axis, and hose reels 57 and 58 are mounted for 26 rotation about another common axis. Wide diameter hoses 59, 60 27 and 61 are connected to top drive 43 at one end, and pass around 28 the top of corresponding reels 54, 55 and 56 respectively.
29 Narrow diameter hoses 62 and 63 (each of which references relate to either one or to a plurality of hoses) are connected at one 31 end to top drive 43, and pass over the tops of hose reels 57 and 32 58. The other ends of hoses 59-63 pass in parallel down the 33 mast, either inside or tpreferably) outside the mast, and are 34 clamped at a central location between the top and bottom of the mast.
36 As pulley carrier 41 rises, and as top drive 43 rises 37 twice the distance, the hoses pass around the hose reels which 38 rise or lower as described earlier one-half the distance of the I 1 696~7 01 top drive, keeping the hoses in a taut, contxolled and parallel 02 condition.
03 Either of the two embodiments described above can be 04 used, as the design of the drilling rig aictates. However the 05 embodiment described with reference to Figures 3 and 3a has 06 advantage when used with mobile deep well drilling rigs, since 07 the major pressure exerted by the hydraulic cylinders is against 08 the bottom of the mast. Accordingly the mast frame can be of 09 substantially lighter design to accommodate less stress than in prior art designs. It is usual in prior art mobile drilling rigs 11 that the top drive moves, typically, between about 15 and 30 feet 12 (depending on the mast height). The hose management problem 13 becomes increasingly severe as the top drive movement distance 14 becomes greater, with larger rigs.
Consequently for deep well drilling, e.g. drilling rigs 16 which have depth capacity in excess of 5,000 feet, the top drive 17 stroke must be so great (e.g. 40 to 45 feet, at least) that both 18 the hose management problem and strength of mast becomes acute.
19 For such deep well portable drilling rigs the structure described with reference to Figures 3 and 3a has been found to be a 21 succes~ful solution, and indeed has been found to be one of the 22 structural solutions which makes mobile deep well drilling 23 feasible.
24 A person skilled in the art understanding this invention may now conceive of alternative embodiments or 26 variations in design. All are considered to be within the sphere 27 and scope of this invention as defined in the claims appended 28 hereto.
29 _ 9 _
~4 A drilling rig, particularly a portable drilling rig 05 i~ Llsually comprised of a mast and a top drive which rotates and 06 drives drilling pipe to which an auger or a bit is attached into 07 the ground. The top drive slides along mast guides and is 08 usually connected to one or a pair of chains which moves along 09 the mast. A long hydraulic cylinder drives the top drive up and down along the guides. Maximum hydraulic pressure is usually 11 required to draw the top drive up, since the weight of the pipe 12 usually aids the downward drilling pressure required. As the top 13 drive is driven downward, the pipe is rotated and is driven into 14 the ground.
Hydraulic fluid pressure is required at the top drive 16 to rotate the pipe holder. In addition, a supply of drilling 17 mud, and sometimes water must be provided to the top drive for 18 transmission through the center of the pipe to the bottom of the 19 hole. These fluids are supplied via flexible hoses; for example there are sometimes five flexible hoses connected to the top 21 drive.
22 The travel distance of the top drive down or up the 23 portable drilling rig masts sometimes is as great as 40 or 45 24 feet. Clearly the hoses must be flexible, and management of the hoses has posed a difficult problem.
26 The hoses can be looped over a support attached to the 27 top drive, and the slack looped down. As the top drive is 28 lowered toward the ground, the slack is increased. However with 29 larger drilling rigs having greater mast heights, increased drilling pressure requirements and increased mud and water supply 31 requirements, there is a substantial slack management problem.
32 If the slack is confined within the mast, the result of 33 confinement in the narrow space is chaffing and cracking of the 34 hoses, resulting in breakdowns in the field and subsequent loss of drilling time and money, as well as equipment replacement 36 cost.
37 The present invention is directed to a structure which 38 not only provides lifting and lowering force to the top drive, .~.
., .
01 but also manages the hoses at the same time. The hoses are 02 carried on a movable reel carried on the mast above the top 03 drive. The hoses are looped over the reel. The hose reel is 04 linked to the top drive so as the top drive moves up and down the 05 mast, the hose reel moves one-half the distance, thus effectively 06 keeping the hoses taut and managed.
07 More particularly, the invention is a drilling rig 08 comprising a mast, a top drive mounted for movement along the 09 mast, a hose reel mounted for move~ment along the mast, a hose connected to the top drive looped over the hose reel to a fixed 11 position relative to the mast, a driving apparatus for driving 12 the top drive along the mast, and a driving apparatus for driving 13 the hose reel along the mast at a rate sufficient to take up or 14 pay out hose slack as the top drive is moved.
According to a preferred embodiment of the invention 16 the hose reel is mounted above the top drive for movement along 17 the mast, and the hose is looped over the hose reel. The hose 18 reel is moved along the mast one-half the distance as the top 19 drive in the same direction and at the same time as the top drive.
21 Embodiments of the invention will now be described with 22 reference to the following drawings, in which:
23 Figure 1 is a side view of a portable drilling rig of 24 the kind with which the present invention can be used, Figure 2 is a schematic, perspective and partly phantom 26 view of a structure of a mast mechanism according to one 27 embodiment of the invention, 28 Figure 3 is a schematic perspective and partly phantom 29 view of a hoisting and lowering mechanism for the top drive according to a second embodiment of the invention, and 31 Figure 3a is a schematic, perspective and partly 32 phantom view of the upper portion of the embodiment shown 33 in Figure 3, illustrating the hose reel portion of the present 34 invention.
Turning now to Figure l, a side view of a portable 36 drilling rig is shown. The rig is comprised of a mast 1 which is 37 mounted at a hinged axis 2 to a truck 3. Mounted and 38 unreferenced at the rear of the truck typically is a mud pump, a 1 ~ 69~7 01 hydraulic fluid pump or providing rotational pressure to a top 02 drive, etc.
03 A top drive 4 is mounted along guides on the mast 1 04 whereby it can be driven down and pulled up. A plurality of 05 hoses 5 are connected from the top drive 4 to the mud pump, 06 hyclraulic pressure pump, etc., mounted on the back of the truck.
07 A hydraulic cylinder 6 is linked between the rear of the truck 08 and the mast 5, and the rear of the truck (and sometimes the 09 front of the truck) is braced against the ground by means of jack 7. A carrier frame 8 located adjacent the rear of the cab or 11 elsewhere at a convenient support location on the truck frame is 12 mounted at approximately the same height as the hinge axis 2.
13 In operation, the mast 1 is carried in a horizontal 14 position, supported along the hinge axis 2 and by the carrier frame 8 during transportation to the drilling site. The jacks 7 16 are lowered, bracking the truck, and hydraulic cylinder 6 is then 17 extended, which causes the mast 1 to become raised to a vertical 18 position. The hoses 5, which had been folded during 19 transportation to the site, are partly extended.
The top drive is raised to the height of a drilling 21 pipe. One end of a length of drilling pipe is attached to the 22 top drive, and a hydraulic cylinder contained within the mast 23 exerts downward force against the top drive. At the same time 24 the hydraulic pump on the back of the truck provides hydraulic pressure to the top drive via hoses 5, causing rotation of the 26 pipe. A bit or auger at the bottom of the pipe causes the pipe 27 to drill into the ground. When the pipe has been extended into 28 the ground, the top drive is raised again, and a second pipe is 29 attached thereto, its bottom being attached to the top of the pipe already in the ground. In this manner a hole hundreds or 31 thousands of feet deep may be drilled, using series of 32 interconnected pipes.
33 Similarly, when the pipes must be retracted, e.g. to 34 change the bit, remove cuttings, or remove cores, the top drive is moved up the mast, and a pipe is removed, the top drive is 36 moved to the bottom of the mast, where i-t is connected to the top 37 of the next pipe extending from the ground, and the top drive is 38 moved up the mast and the next pipe is removed. Clearly the top 01 drive must move up and down the mast continuously as the drilling 02 takes place. Clearly the hoses must flex continuously as the top 03 drive moves up and down the mast.
04 Figure 2 illustrates one embodiment of the invention in 05 schematic form. The mast itself is not shown, except as an open 06 frame 11, for purposes of clarity of illustration. The top drive 07 12 of well known form is mounted for guided movement along the 08 mast using conventional techniques.
09 According to this embodiment, a hydraulic cylinder 13 has one end mounted conventionally at the top of the mast, and 11 extends downward along the axis of the mast. However, instead of 12 the other end of the hydraulic cyhlinder being connected directly 13 to the top drive, a pulley carrier 14 is mounted at the other end 14 of the hydraulic cylinder. A pair of pulleys 15 and 16 are mounted for rotation about a horizontal axis to the pulley 16 carrier, pulley 15 being mounted directly above pulley 16. A
17 cable 17 has one end fixed to the bottom of the mast at position 18 18, is looped around the top of pulley 16 and is further looped 19 around the bottom of a pulley 19 which is mounted for rotation about a horizontal axis adjacent the bottom of the ma~t. The 21 other end of cable 17 is fixed to top drive 12 at position 20.
22 Another pulley 21 is mounted approximately mid-way 23 between the top and bottom of the mast, for rotation about a 24 horizontal axis. A second cable 22 is fixed to the side or bottom of the mast, is looped over the top of pulley 21, around 26 the bottom of pulley 15, and over the top of a pulley 23 which is 27 fixed at the top of the mast for rotation about a horizontal 28 axis. Cable 22, after passing over the top of pulley 23 is fixed 29 to top drive 12 (at a position not shown).
In order to accommodate cables 17 and 22, pulley 31 carrier 14 should have a pair of slots 24 extending along its 32 sides adjacent the edges of pulleys 15 and 16 from top to bottom, 33 to facilitate no interference between the pulley carrier and 34 cables 17 and 24.
At least one, but preferably two pulleys 25 are fixed 36 at the top of the mast, spaced in a single plane. A hose reel 27 37 is fixed for rotation about a horizontal axis to a movable reel 38 carrier 28. The reel carrier is carried within conventionally 1 i &~B27 01 const:ructed vertical guides fixed to the sides of mast 1. A
02 cablf~ 26 has one end fixed at position 29 to the pulley carrier 03 14, passes around pulley 25 and its other end is fixed to reel 04 carrier 28 at position 30, preferably by adjustment bolts which 05 can lengthen or shorten cable 26.
06 Preferably, but not necessarily, a further cable 31 is 07 fixed to top drive 12 at position 32, passes around a pulley 33 08 which is fixed for rotation about a horizontal axis to reel 09 carrier 38, and is connected to the side or bottom of the mast at position 34.
11 In order to lower the mast, hydraulic pressure is 12 applied to hydraulic cylinder 13, which extends in response.
13 This causes the pulley carrier block 14 to lower. As a result 14 the length of cable 17 between position 18, pulley 16 and pulley 19 decreases, and the length of cable 17 between pulley 19 and 16 top drive 12 increases.
17 At the same time, the length of cable between pulley 18 21, pulley 15 and pulley 23 increases. The increased cable 19 length is taken from the length betweeen top drive 12 and pulley 23, which shortens. Accordingly, tension is exerted in pulley 21 22, which causes top drive 12 to rise.
22 Similarly, as hydraulic cylinder 13 contracts, the 23 length of cable 17 between position 18, pulley 16 and pulley 19 24 increases, shortening the cable between pulley 19 and top drive 12. Tension is exerted in cable 17, pulling top drive down. At 26 the same time the length of cable 22 between pulley 21, pulley 15 27 and pulley 23 decreases due to the pulley carrier block 14 28 rising, which lengthens the cable between carrier 23 and top 29 drive 12, providing the slack which allows top drive 12 to lower due to tension in cable 17.
31 Clearly as pulley carrier drive 14 lowers, top drive 12 32 rises twice the distance (and at twice the rate). Similarly as 33 pulley carrier 14 rises, top drive 12 lowers twice the distance 34 (and at twice the rate).
As pulley carrier block 14 lowers, causing top drive 12 36 to rise, tension is exerted in cable 26. This is transla~ed to 37 reel carrier 28, which rises. However the reel carrier rises at the 38 same rate and over a similar distance as pulley carrier block 14.
116~
01 A plurality of hoses 35 for the top drive are looped 02 over hose reel 27, and are fixed to the mast by one or a 03 plurality of clamps 36 at about the midway position between the 04 top and bottom of the mast, and extend lower along the mast.
05 As top drive 12 rises, since hose 35 is looped over 06 hose reel 27, the amount of slack hose which is generated is only 07 about one-half the displacement of top drive 12. Since reel 08 carrier 28 moves the same distance as pulley carrier block 14, 09 which is one-half the displacement of top drive 12, the slack hose is effectively and precisely taken up.
11 Similarly as top drive 12 moves downward, it requires 12 an additional supply of hose. This is provided by reel carrier 13 28 moving downward one-half the distance that top drive 12 moves 14 downward, the distance moved by reel carrier 28 being controlled by the pulley carrier block 14 moving upward. The precise amount 16 of hose required by the downward movement in the top drive is 17 thus effectively provided.
18 Cable 31 provides support for top drive 12 as it is 19 moved up or down, via a pulley 33 mounted on reel carrier 28.
The amount of cable required to accommodate the displacement of 21 top drive 12 i8 provided by the displacement of reel carrier 28.
22 Pulley 21 is optional, and it can be deleted if the 23 associated end of cable 22 is fixed to a position on mast 1 which 24 is as high or is higher than pulley 21.
It has been found desirable to position hose reel 27 26 outside and alongside the mast, the hoses passing in parallel 27 over the reel, and being connected to the top drive in front of 28 the mast.
29 The structure described above has been found to be an effective means for transmitting pressure gainst the top drive 12 31 along the mast by hydraulic cylinder 13, while the hoses are Xept 32 taut and well managed, and has been found to substantially reduce 33 the incidence of tangling, cracking, chafing, etc. encountered 34 with prior art structures.
A second embodiment of the invention is shown in 36 Figures 3 and 3a.
37 Turning to Figure 3, a schematic perspective and partly 38 phantom view of the lifting mechanism is illustrated. A mast 1 ~ 69627 01 frame 40 (shown shortened for illustration purposes) supports a 02 pulley carrier 41 mounted for guided movement upward and downward 03 along the mast, using conventional construction techniques. One 04 or a pair (as shown) of hydraulic cylinders 42 are linked to the 05 bottom of the mast frame 40, having their other ends bearing 06 upwardly against and preferably linked to a bottom of pulley 07 carrier 41, within the mast. Accordingly as hydraulic cylinders 08 42 extend or contract, pulley carrier 41 moves up or down the 09 mast.
A top drive 43 is also mounted within vertical guides 11 fixed to mast frame 40. For illustration purposes, one form of 12 such guides is shown. A pair of channels 44, extending 13 vertically along opposite sides of top drive 43 have beams 45 14 (only one of which is shown) fixed to the mast and fitted therein. The beams 45 retain top drive 43 for vertical 16 movement in one plane, allowing it to slide up and down via 17 channels 44.
18 A pair of toothed lifting wheels 46 are mounted 19 opposite each other for rotation on pulley carrier 41, along a single ~orizontal axis about which both can rotate. Chains 47 21 are linked to top of top drive 43, pass around the corresponding 22 lifting pulleys, and are connected either directly or via straps 23 48 to the bottom of the mast frame 40.
24 Another pair of pulleys 48 are mounted along a single horizontal axis about which they both rotate, to pulley carrier 26 41. A further pair of pulleys 49 are mounted for rotation about 27 a horizontal axis to fixed positions at the top of mast frame 28 40. Preferably two pairs of pulleys 50 and 51 are mounted for 29 horizontal rotation at the bottom of mast frame 40, one set of pulleys 50 and 51 being spaced in a single plane opposite a 31 second set of pulleys 50 and 51 mounted in another single plane.
32 A pair of cables 52 are fixed to the top of the mast 33 frame 40 with one of each at position 53 (preferably through 34 cable adjustirrg bolts). The cables pass under pulleys 48, over pulleys 49, under pulleys 50 and 51, and are connected to the 36 bottom of top drive 43 at positions 54.
37 In operation of the top drive movement mechanism, to 38 raise top drive 43, hydraulic cylinders 42 are caused to expand.
lJ6~27 01 Pulley carrier 41 is forced upward, and since chains 47 are fixea 02 at one end to -the bottom of mast frame 40, as pulley carrier 41 03 rises, the portion of chain 47 between pulley 46 and the top 04 drive is shortened, causing rotation of lifting pulleys 46. With 05 the shortening of this portion of the chain, top drive 43 is 06 caused to rise.
07 At the same time, tension is exerted from top drive 43 08 on cable 52. As pulley 48 rises with pulley carrier 41, 09 additional slack in cable 52 is provided which allows top drive 43 to rise.
11 In order to lower top drive 43, hydraulic cylinders 42 12 are caused to contract. This causes pulley carrier 41 to lower.
13 The length of the portion of each cable 52 between position 53, 14 pulley 48, and pulley 49 is increased, and the increased cable length is obtained by tension being exerted along the remaining 16 cable passing around pulleys 50 and 51 to top drive 54. Top 17 drive 43 is thus caused to lower, and slack in chains 47 is 18 provided by pulley carrier 41 lowering.
19 It will be evident that top drive 43 moves upward or downward twice the distance moved by pulley carrier 41.
21 Turning now to Figure 3a, additional apparatus 22 associated with top drive 43 is shown. Hose reels 54-58 are 23 mounted for rotation about a horizontal axis, on pulley carrier 24 41. Large hose reels 54, 55 and 56 are mounted for rotation about a common axis, and hose reels 57 and 58 are mounted for 26 rotation about another common axis. Wide diameter hoses 59, 60 27 and 61 are connected to top drive 43 at one end, and pass around 28 the top of corresponding reels 54, 55 and 56 respectively.
29 Narrow diameter hoses 62 and 63 (each of which references relate to either one or to a plurality of hoses) are connected at one 31 end to top drive 43, and pass over the tops of hose reels 57 and 32 58. The other ends of hoses 59-63 pass in parallel down the 33 mast, either inside or tpreferably) outside the mast, and are 34 clamped at a central location between the top and bottom of the mast.
36 As pulley carrier 41 rises, and as top drive 43 rises 37 twice the distance, the hoses pass around the hose reels which 38 rise or lower as described earlier one-half the distance of the I 1 696~7 01 top drive, keeping the hoses in a taut, contxolled and parallel 02 condition.
03 Either of the two embodiments described above can be 04 used, as the design of the drilling rig aictates. However the 05 embodiment described with reference to Figures 3 and 3a has 06 advantage when used with mobile deep well drilling rigs, since 07 the major pressure exerted by the hydraulic cylinders is against 08 the bottom of the mast. Accordingly the mast frame can be of 09 substantially lighter design to accommodate less stress than in prior art designs. It is usual in prior art mobile drilling rigs 11 that the top drive moves, typically, between about 15 and 30 feet 12 (depending on the mast height). The hose management problem 13 becomes increasingly severe as the top drive movement distance 14 becomes greater, with larger rigs.
Consequently for deep well drilling, e.g. drilling rigs 16 which have depth capacity in excess of 5,000 feet, the top drive 17 stroke must be so great (e.g. 40 to 45 feet, at least) that both 18 the hose management problem and strength of mast becomes acute.
19 For such deep well portable drilling rigs the structure described with reference to Figures 3 and 3a has been found to be a 21 succes~ful solution, and indeed has been found to be one of the 22 structural solutions which makes mobile deep well drilling 23 feasible.
24 A person skilled in the art understanding this invention may now conceive of alternative embodiments or 26 variations in design. All are considered to be within the sphere 27 and scope of this invention as defined in the claims appended 28 hereto.
29 _ 9 _
Claims (10)
1. A drilling rig comprising:
(a) a mast, (b) a top drive, including at least one hose connected between the top drive and a pump position adjacent the bottom of the mast, (c) a hose reel disposed above the top drive, the hose passing from the top drive over the reel to the pump position, (d) means for driving the top drive along the mast, and for driving the reel in a similar direction at a rate and distance one-half that of the top drive, whereby the hose can be maintained in an outstretched and controlled condition, looped above the top drive.
(a) a mast, (b) a top drive, including at least one hose connected between the top drive and a pump position adjacent the bottom of the mast, (c) a hose reel disposed above the top drive, the hose passing from the top drive over the reel to the pump position, (d) means for driving the top drive along the mast, and for driving the reel in a similar direction at a rate and distance one-half that of the top drive, whereby the hose can be maintained in an outstretched and controlled condition, looped above the top drive.
2. A drilling rig as defined in claim 1, in which the reel is rotatably mounted on a carrier, further including means for driving the carrier along the mast coupled to the means for driving the top drive.
3. A drilling rig as defined in claim 1, including a hydraulic cylinder, the hose reel being rotatably connected to the cylinder for movement along the axis of the mast at a rate related to the rate of movement of the cylinder, a pulley disposed above or below the top drive, cable means having one end fixed, passing around the pulley and having the other end fixed to the top drive, the pulley being rotatably connected to the cylinder for movement of its axis along the mast at a similar rate as said reel, whereby upon extension or retraction of the cylinder, both the hose reel and pulley are caused to move, pulling the cable over the pulley, moving the top drive along the mast a distance and at a rate twice that of the hose reel, but extending or retracting the cable at the same rate as the hose, thus keeping it extended and taut.
4. A drilling rig as defined in claim 1, further including:
(a) a hydraulic cylinder having one end fixed to the top of the mast, and extending downward along the axis of the mast, (b) a pulley carrier adapted to be moved along the mast, fixed to the other end of the cylinder and movable by extension or retraction of the cylinder, (c) first and second pulleys rotatably fixed to the carrier one above the other, (d) third and fourth pulleys rotatably fixed adjacent the top and bottom of the mast respectively, (e) first cable means having one end fixed to the bottom of the mast, passing over the lower of the first and second pulleys, passing under the fourth pulley and having its other end fixed to the top drive, (f) second cable means having one end fixed to the mast, passing under the upper of the first and second pulleys, passing over the third pulley and having its other end fixed to the top drive, (g) a fifth pulley rotatably fixed to the top of the mast, (h) third cable means coupled to the hose reel, passing over the fifth pulley and being fixed to the carrier, whereby upon extension of the hydraulic cylinder, the carrier is caused to move downward along the mast, drawing the second and third cable means downward and thus lifting the top drive and hose reel, the top drive being lifted twice the distance and at twice the rate as the hose reel and the lowering rate of the carrier, but at the same rate as the retraction of the hose caused by lifting of the hose reel.
(a) a hydraulic cylinder having one end fixed to the top of the mast, and extending downward along the axis of the mast, (b) a pulley carrier adapted to be moved along the mast, fixed to the other end of the cylinder and movable by extension or retraction of the cylinder, (c) first and second pulleys rotatably fixed to the carrier one above the other, (d) third and fourth pulleys rotatably fixed adjacent the top and bottom of the mast respectively, (e) first cable means having one end fixed to the bottom of the mast, passing over the lower of the first and second pulleys, passing under the fourth pulley and having its other end fixed to the top drive, (f) second cable means having one end fixed to the mast, passing under the upper of the first and second pulleys, passing over the third pulley and having its other end fixed to the top drive, (g) a fifth pulley rotatably fixed to the top of the mast, (h) third cable means coupled to the hose reel, passing over the fifth pulley and being fixed to the carrier, whereby upon extension of the hydraulic cylinder, the carrier is caused to move downward along the mast, drawing the second and third cable means downward and thus lifting the top drive and hose reel, the top drive being lifted twice the distance and at twice the rate as the hose reel and the lowering rate of the carrier, but at the same rate as the retraction of the hose caused by lifting of the hose reel.
5. A drilling rig as defined in claim 4, further including a fifth pulley rotatably fixed to the mast above a predetermined highest movement position of the carrier, the second cable means being fixed to the mast below the fifth pulley and passing over the fifth pulley and under the upper of the first and second pulleys.
6. A drilling rig as defined in claim 1, 4 or 5, further including a truck frame, means for hinging the mast adjacent its bottom to the rear of the truck frame whereby the mast can be disposed in a horizontal position along the truck frame or in a vertical position at the rear of the truck frame, a hydraulic cylinder having one end fixed to the truck frame and the other to the mast, whereby upon extension of the latter hydraulic cylinder, the mast can be lifted from its horizontal to its vertical position.
7. A drilling rig as defined in claim 1, further including:
(a) a hydraulic cylinder, having one end fixed to the bottom of the mast and extending upwardly parallel to the axis of the mast, (b) a lifting wheel rotatably fixed to the top of the hydraulic cylinder, disposed above the top drive, (c) lifting chain means having one end fixed to the top drive, passing over the lifting wheel, and having its other end fixed to the bottom of the mast, (d) first and second pulleys, the first pulley rotatably fixed to the top of the hydraulic cylinder, the second rotatably fixed to the top of the mast.
(e) a third pulley rotatably fixed to the bottom of the mast, (f) cable means having one end fixed to the top of the mast passing under the first pulley, passing over the second pulley, passing under the third pulley and having its other end fixed to the top drive, (g) means rotatably fixing the hose reel to the top of the hydraulic cylinder, whereby upon extension of the hydraulic cylinder, the first pulley, lifting wheel and hose reel are caused to move upwardly in unison at the same rate as the extension of the hydraulic cylinder, causing lifting of the top drive at twice the rate as the lifting wheel via the chain means, and drawing the hose over the hose reel at the same rate as the chain means, and upon retraction of the hydraulic cylinder, the first pulley is caused to be drawn downward, drawing down the cable means, thus exerting force drawing the top drive downward at a rate twice that of the lifting wheel, the first pulley and the hose reel, thus retaining the hose extended and controlled.
(a) a hydraulic cylinder, having one end fixed to the bottom of the mast and extending upwardly parallel to the axis of the mast, (b) a lifting wheel rotatably fixed to the top of the hydraulic cylinder, disposed above the top drive, (c) lifting chain means having one end fixed to the top drive, passing over the lifting wheel, and having its other end fixed to the bottom of the mast, (d) first and second pulleys, the first pulley rotatably fixed to the top of the hydraulic cylinder, the second rotatably fixed to the top of the mast.
(e) a third pulley rotatably fixed to the bottom of the mast, (f) cable means having one end fixed to the top of the mast passing under the first pulley, passing over the second pulley, passing under the third pulley and having its other end fixed to the top drive, (g) means rotatably fixing the hose reel to the top of the hydraulic cylinder, whereby upon extension of the hydraulic cylinder, the first pulley, lifting wheel and hose reel are caused to move upwardly in unison at the same rate as the extension of the hydraulic cylinder, causing lifting of the top drive at twice the rate as the lifting wheel via the chain means, and drawing the hose over the hose reel at the same rate as the chain means, and upon retraction of the hydraulic cylinder, the first pulley is caused to be drawn downward, drawing down the cable means, thus exerting force drawing the top drive downward at a rate twice that of the lifting wheel, the first pulley and the hose reel, thus retaining the hose extended and controlled.
8. A drilling rig as defined in claim 7 further including a pulley carrier, including means for carrying axles of the first pulley, the lifting wheel and the hose reel, said other end of the hydraulic cylinder bearing against the pulley carrier for applying lifting and lowering force thereto.
9. A drilling rig as defined in claim 7 or 8, further including a truck frame, means for hinging the mast adjacent its bottom to the rear of the truck frame whereby the mast can be disposed in a horizontal position along the truck frame or in a vertical position at the rear of the truck frame, a hydraulic cylinder having one end fixed to the truck frame and the other to the mast, whereby upon extension of the latter hydraulic cylinder, the mast can be lifted from its horizontal to its vertical position.
10. A method of controlling a hose connected to the top drive of a drilling rig comprising passing the hose over a hose reel located above the top drive, driving the top drive along the mast and at the same time driving the hose reel in the same direction as the top drive at one-half the rate and over one half the distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000393830A CA1169627A (en) | 1982-01-08 | 1982-01-08 | Drilling rig mast apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000393830A CA1169627A (en) | 1982-01-08 | 1982-01-08 | Drilling rig mast apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1169627A true CA1169627A (en) | 1984-06-26 |
Family
ID=4121788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000393830A Expired CA1169627A (en) | 1982-01-08 | 1982-01-08 | Drilling rig mast apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1169627A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2048622A1 (en) * | 1991-07-12 | 1994-03-16 | Alquezar Gazulla | Tower for the extraction of liquids by drilling. |
| WO2004067898A2 (en) * | 2003-01-24 | 2004-08-12 | Helmerich & Payne, Inc. | Integrated mast and top drive for drilling rig |
| EP1580398A1 (en) * | 2004-03-23 | 2005-09-28 | BAUER Maschinen GmbH | Apparatus and method for subsoil construction |
| EP1881151A1 (en) * | 2006-07-20 | 2008-01-23 | Drillmec S.p.A. | Drilling unit |
| US7765749B2 (en) | 2003-04-25 | 2010-08-03 | National Oilwell, L.P. | Fast moving drilling rig |
| NO331694B1 (en) * | 2011-01-14 | 2012-02-27 | Aker Mh As | Cable device for coupling between a top drive unit and a derrick unit, and a method for providing such a cable device |
| CN103806850A (en) * | 2014-01-26 | 2014-05-21 | 中国石油集团西部钻探工程有限公司 | Separating workover rig and use method thereof |
| CN112443276A (en) * | 2020-12-01 | 2021-03-05 | 中国地质科学院 | Tight rock geological exploration sampling drilling system and working method thereof |
-
1982
- 1982-01-08 CA CA000393830A patent/CA1169627A/en not_active Expired
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2048622A1 (en) * | 1991-07-12 | 1994-03-16 | Alquezar Gazulla | Tower for the extraction of liquids by drilling. |
| WO2004067898A2 (en) * | 2003-01-24 | 2004-08-12 | Helmerich & Payne, Inc. | Integrated mast and top drive for drilling rig |
| WO2004067898A3 (en) * | 2003-01-24 | 2004-10-14 | Helmerich & Payne | Integrated mast and top drive for drilling rig |
| US6860337B1 (en) | 2003-01-24 | 2005-03-01 | Helmerich & Payne, Inc. | Integrated mast and top drive for drilling rig |
| US7290621B2 (en) | 2003-01-24 | 2007-11-06 | Helmerich & Payne, Inc. | Integrated mast and top drive for drilling rig |
| US7765749B2 (en) | 2003-04-25 | 2010-08-03 | National Oilwell, L.P. | Fast moving drilling rig |
| EP1580398A1 (en) * | 2004-03-23 | 2005-09-28 | BAUER Maschinen GmbH | Apparatus and method for subsoil construction |
| EP1881151A1 (en) * | 2006-07-20 | 2008-01-23 | Drillmec S.p.A. | Drilling unit |
| NO331694B1 (en) * | 2011-01-14 | 2012-02-27 | Aker Mh As | Cable device for coupling between a top drive unit and a derrick unit, and a method for providing such a cable device |
| NO20110065A1 (en) * | 2011-01-14 | 2012-02-27 | Aker Mh As | Cable device for coupling between a top drive unit and a derrique unit, and a method for providing such a cable device |
| CN103806850A (en) * | 2014-01-26 | 2014-05-21 | 中国石油集团西部钻探工程有限公司 | Separating workover rig and use method thereof |
| CN103806850B (en) * | 2014-01-26 | 2016-07-06 | 中国石油集团西部钻探工程有限公司 | Separate type workover rig and using method thereof |
| CN112443276A (en) * | 2020-12-01 | 2021-03-05 | 中国地质科学院 | Tight rock geological exploration sampling drilling system and working method thereof |
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