AU718034B2 - Pipe handling device - Google Patents

Description

Pipe Handling Device TECHNICAL FIELD OF THE INVENTION This invention relates to the handling of elongate objects such as, for example, pipe for a horizontal boring device.

BACKGROUND OF THE INVENTION In recent years, many utility lines have been laid or replaced by use of a horizontal boring machine which eliminates the need to dig a trench from the surface to install or replace the utility. This technique has generally come to be known as trenchless technology.

10 In a typical horizontal boring machine, a bore hole will be formed with a steerable bit. The boring machine will be mounted at the surface. One hydraulic motor on the boring machine causes the drill bit and drill string to rotate while another thrusts the drill bit and drill string forward as the bore is formed. It o. is also common to backream the bore with the machine, rotating a backreaming tool while drawing back the drill string to the boring machine.

The drill string is formed of a plurality of individual drill string sections threaded together. As the machine initially bores the hole, additional drill string sections must be added as the bore is lengthened. Similarly, when backreaming the bore, the individual drill string sections must be removed.

Traditionally, this activity has been done by hand, with the assistance of wrenches on the drilling machine. There has also been a requirement to store the individual drill string sections before and after use.

11. FEB. 2000 17:12 WRAY ASSOCIATES NO. 4302 P. 5/15 2/1 The typical horizontal boring device requires a three man crew. To increase efficiency and reduce cost, it would be of great benefit to provide an automated system for placing drill pipe sections in or removing drill pipe sections from the boring machine automatically during operation. Ideally, this would eliminate the need for a third man in the operation and permit the boring machine to be operated with a crew of two. In addition to an increase in efficiency and reduction of cost, eliminating the use of an individual to manhandle the drill pipe sections would reduce the chances for injury.

i 10 In accordance with one aspect of the present invention, there is handling device for storing and transporting the elongate objects to and from the machine, wherein the handling device comprises: :1l: a magazine attached to the machine and adapted to store a e 15 plurality of elongate objects; and .a handling assembly adapted to transport at least one elongate object to and from the magazine and the machine, wherein the magazine is adapted to passively position the plurality of elongate objects in the magazine as the handling assembly removes an elongate object from the magazine or places an elongate object in the magazine.

With passive positioning, the elongate objects are able to move of their own accord with removal of an elongate object from, or addition of an elongate object to, the magazine. In a number of embodiments, the elongate objects move of their own accord under the influence of gravity from a return position at which they are returned to the magazine towards a removal position at which the elongate objects can be retrieved from the magazine.

11/02 '00 FRI 20:02 [TX/RX NO 7384] II.FED.2000 17:12 WRAY ASSOCIATES NO,4302 P. 6/15 2/2 In accordance with another aspect of the present invention, there is provided a method for handling a plurality of pipe sections at a horizontal boring site and for use with a horizontal boring machine having a connecting position for connecting at least one of the plurality of pipe sections, the method comprising the steps of: storing the plurality of pipe sections in a storage position adjacent to the horizontal boring machine; during the boring phase, delivering at least one of the plurality of pipe sections from the storage position to a receiving position laterally adjacent the connecting position; and transferring the delivered pipe section from the receiving position to the connecting position of the horizontal boring machine; wherein transfer of the delivered pipe section is carried out exclusively by linear movement of the delivered pipe section between the receiving position and the connecting position.

11/02 '00 FRI 20:02 [TX/RX NO 73841 3/1 BRIEF DESCRIPTION OF THE DRAWINGS For a more complete understanding of the present invention and for further advantages thereof, reference is now made to the following description of the preferred embodiment, taken in conjunction with the accompanying drawings, in which: Figure 1 is a perspective view of a machine having an automatic pipe handling device, forming a first embodiment of the present invention; Figure 2 is a partial cross-sectional view taken along with view A in Figure 1; Figure 3 is a perspective view of a modified pipe rack for use with the device; S* Figure 4 is a side view in cross-section of the pipe rack of Figure 3; Figure 4A is a detail view of the rack of Figure 4 illustrating the 15 rubber straps cushioning the pipe section movement; Figure 5 is a partial cross-sectional view of the pipe rack of Figure eeeeo S" 3; Figure 6 is a partial cross-sectional view of a modification of the pipe rack of Figure 3; Figure 7 is a perspective view illustrating another modification of the automatic pipe handling device; Figure 8 is an end view of the device of Figure 7; 3/2 Figure 9 is an exploded view of a portion of the device of Figure 7; Figure 10 is an exploded view of a pipe loader used in a pipe handling device forming a modification of the invention; Figure 11 is a side view of the extension frame of the pipe loader; Figure 12 is an end view of the extension frame; Figure 13 is a schematic view of hydraulic circuits in the device; Figure 14 is a top view of the pipe box used in the device; Figure 15 is a side view of the pipe box; a *e 4/1 Figure 16 is an end view of the pipe box; Figure 17 is a perspective view of a cylinder mount and rotation member mounted thereon for limited pivotal motion; Figure 18 is a plan view of a pivot adjust stop; Figure 19 is a top view of the rotation arm; Figure 20 is an end view of the rotation arm; and Figure 21 is a perspective view of the end panel on the pipe box.

DETAILED DESCRIPTION ::With reference now to Figures 1 and 2, a machine having an automatic pipe handling device 10 is illustrated which forms a first embodiment of the present invention. The device includes a support frame 12 which is permanently attached to the drill rig 14. The drill rig 14 is not illustrated in its entirety as it is a conventional and well known device. A pipe rack 16 is removably attached to the support frame 12 to store pipe sections 18 (see Figures 4, 5 and 6) when not in use by the drill rig.

•oo.oi S" The support frame 12 mounts a longitudinal shaft 20 which is *go• mounted for rotation about an axis 22 which is parallel to the spindle axis 24 of the drill rig 14. The spindle axis 24 is the axis along which the drill string extends and is the axis of rotation of the drill string at the drill rig. To insert a pipe section 18 within the drill string, or remove the pipe section, the pipe section must be laid along the spindle axis 24 or removed from the spindle axis 24.

The longitudinal shaft 20 is rotatable by a hydraulic drive motor 26.

Two hydraulic cylinders 28 and 30 are mounted along the length of the shaft and are mounted perpendicular to the axis 22. At the end of the piston of each of the cylinders 28 and 30 is mounted a spring loaded pipe gripper 32. Grippers 32 include fixed fingers 33 and spring loaded fingers 35 urged to grip the pipe section by springs 37. The grippers 32 include guide shafts 34 which slide within brackets 36 mounted on the cylinders 28 and 30 so that the movement of the pipe i WO 96/26349 PCT/US96/02354 grippers is only along an axis perpendicular to the axis 22.

The pipe rack 16 is formed of a frame weldment 38 including an upper bracket 40, a lower bracket 42 and side plates 44 and 46. Bars 60 and 62 extend between the side plates as well. Each side plate mounts a lifting eye 48 and is provided with aperture 50 to attach the pipe rack 16 to the support frame 12. An elongated aperture 57, located on bracket 56 of support frame 12, engages tab 59 located on the base of pipe rack 16 as the pipe rack is loaded onto support frame 12. Pins 52 are inserted through apertures 54 in brackets 56 on the support frame 12 and through the apertures 50 in the side plates 44 and 46. The pins 52 have a through hole to receive a locking clip 58 to secure the pipe rack on the support frame despite vibration or movement of the boring machine. However, the pipe rack 16 can be relatively easily removed from the support frame 12 by removing the pins and lifting the pipe rack off the frame.

Near each end plate of the pipe rack is mounted a labyrinth track 64 which cooperates with a guide 66 mounted on the inside surfaces of the side plates to form an Scurve path 72 to guide drill pipe within the pipe rack from a return position 68 formed at the top of the pipe rack to a pick up position 70 formed at the bottom of the pipe rack. Attached to each end plate is a guide strip made from a low friction plastic such as UHMW (Ultra High Molecular Weight) plastic, to permit the use of shoulderless pipe in the pipe rack.

Assuming that pipe sections are to be added to the drill string and are presently stored in the pipe rack 16, the pipe rack will first be attached to the support frame 12. The drive motor 26 will then be activated to cause the longitudinal shaft 20 to pivot so that the spring loaded pipe grippers 32 are facing the pipe section at the pick up position 70. The hydraulic cylinders 28 and 30 are activated to extend the pistons thereof so that the pipe grippers 32 move against and over the pipe at the pick up position. The hydraulic cylinders 28 and 30 are then SUBSTITUTE SHEET (RULE 26) WO 96/26349 PCTIUS96/02354 6 retracted, drawing the pipe section from the pick up position and out of the pipe rack. The hydraulic drive motor 26 is then again activated to pivot the longitudinal shaft 20 until the pipe grippers 32 are directed toward the spindle axis 24. The hydraulic cylinders 28 and 30 are again activated to extend the pipe grippers to position the pipe section along the spindle axis 24. The mechanisms of the horizontal boring machine, not shown, then thread the pipe section into the drill string. After the pipe section is threaded, the cylinders 28 and 30 are retracted, pulling the pipe grippers 32 off the pipe section just inserted in the drill string.

If a plurality of pipe sections were stored in the pipe rack 16, when the pipe section in the pick up position 70 is removed by the pipe grippers, the remaining pipe sections 18 in the pipe rack, guided by the S-curve path 72 formed between the labyrinth track 64 and guides 66 at each end of the pipe rack, will move via gravity to urge the next pipe section in line into the pick up position In this manner, each of the pipe sections in the pipe rack 16 can be individually removed from the pipe rack and positioned on the spindle axis 24 to be made up as part of the drill string. Block plates 74 on each of the side plates prevent the pipe section in the pick up position from simply falling out of the pipe rack.

When the boring has been completed, and pipe sections are to be removed from the drill string, the device works essentially in reverse. The longitudinal shaft 20 will be pivoted by hydraulic drive motor 26 to grasp a pipe section 18 on the spindle axis 24. However, instead of being pivoted to the pick up position 70, the longitudinal shaft 20 is rotated by hydraulic drive motor 26 so that the pipe grippers 32 face the return position 68. The hydraulic cylinders 28 and 30 are then extended to move the pipe section 18 into the return position 68. The shaft 20 will then be rotated slightly to move the pipe section inside a portion of the tracks 64 so that when the hydraulic cylinders 28 and 30 are retracted, the pipe section will be held in place by the track plus the end SUBSTITUTE SHEET (RULE 26) WO 96/26349 PCTIS96/02354 7 guides 64 and the pipe grippers 32 will be removed from the pipe section. Alternatively, a reverse stop 65 (see FIGURE 4) can be mounted on the pipe rack which pivots out of the way to allow the pipe section to be inserted in the return position but then pivots back by gravity to block the pipe section from falling out of the pipe rack. Once removed, the pipe section will fall by gravity along the S-curve path 72 between the tracks 64 and guides 66 until it contacts the next previous pipe section inserted into the pipe rack. As pipe sections are removed from the drill string, these steps can be repeated until thepipe rack is completely full of pipe sections and ready to be used again to form another bore. If the drill string contains more pipe sections than pipe rack 16 can hold, the full rack is simply removed and replaced by an empty rack to continue the process.

If heavier pipe sections are used, the spring loaded pipe grippers 32 can be replaced by pipe grippers actuated by hydraulic cylinders.

A detent device 73 on one end of the shaft 20 can assist in indexing the shaft in the positions described above.

The use of the S-curve path and the end guides permit straight, shouldered, bottlenecked, shoulderless or any other style of pipe sections to be used. A number of rubber straps 126 can be mounted within the pipe rack 16 to slow the fall of pipe sections within the rack as seen in FIGURE 4A.

The sequence of operations of the device illustrated in FIGURES 1 and 2 would be for the load sequence to move pipe sections from the rack to the drill string: 1. extend grippers toward pick up position of rack; 2. grip pipe section in pick up position; 3. retract grippers to remove gripped pipe section from pick up position; SUBSTITUTE SHEET (RULE 26) WO 96/26349 PCT/US96/02354 8 4. rotate grippers with pipe section toward spindle axis and extend grippers; retract grippers to release grippers from pipe section; 6. rotate to pick up position; and 7. extend grippers to next pipe section.

The unload sequence moving pipe sections from the drill string to storage in the rack would be as follows: 1. rotate grippers to spindle center line; 2. extend grippers to grip pipe section to be removed from drill string; 3. rotate grippers and removed pipe section to the return position; and 4. retract grippers from pipe section in return position of rack.

The pipe section will then fall by gravity to the pick up position through the S-curve path.

With reference now to FIGURES 3 and 4, a modified pipe rack 80 will be described. The pipe rack 80 includes a number of elements identical to pipe rack 16, including brackets 40 and 42, side plates 44 and 46, lifting eyes 48, apertures 50 and bars 60 and 62. It will be clear from this that pipe rack 80 can be mounted directly on the support frame 12 as a replacement for or substitute for the pipe rack 16 and pipe racks 16 and 80 are completely interchangeable.

Pipe rack 80 has an outer track 82, an intermediate track 84 and an inner track 86 mounted on the inside of each of the side plates 44 and 46. The pipe rack defines a return position 104 and pick up position 96.

A first vertical row 88 is formed between track 82 and track 84. A second vertical row 90 is formed between the intermediate track 84 and the inner track 86. A third vertical row 92 is formed between the inner track 86 and a guide 94 extending from the upper bracket 40 downward toward the lower bracket 42 and then forward to the pick up position 96 at the bottom front of the pipe rack. Block plates 98 are mounted on the plates to prevent pipe SUBSTITUTE SHEET (RULE 26) WO 96/26349 PCT/US96/02354 9 sections in the pipe rack from falling out because of gravity.

Manual upper row selectors 100 and 102 (seen in FIGURE 4) can be positioned to select which row a pipe section will enter after being placed in the return position 104. The manual upper row selectors 100 and 102 are located at each end of the pipe rack 80 at a pivot point 10Oc. Selector 100 selects the third vertical row 92 and rests, when in the receiving position (as seen in FIGURE on stop 100d. Selector 102 selects the second vertical row 90 and rests on stop 100e. The first vertical row 88 is selected by rotation of both manual upper row selectors 100 and 102 about pivot points 100c and into a position as shown at 100f (where selector 102 is shown in FIGURE The top of the rack is open at the position of selectors 100 and 102 so that, for example, selector 100, seen in FIGURE 4 in the receiving position, can be pivoted clockwise about pivot 100c into position 100f beside the position of upper row selector 102 seen in FIGURE 4. Both of the selectors 100 or 102 at each end of the pipe rack must be selected in order for the pipe to enter the desired vertical row. If selector 100 is selected at one end of the pipe rack and selector 102 is selected at the opposite end, the pipe will attempt to enter the second vertical row 90 and the third vertical row 92 simultaneously and become jammed. Preferably, as pipe sections are returned, the third row 92 will be filled up first, next the second row and finally the first row 88.

Near the bottom of the pipe rack 80 are mounted gate rods 106 and 108 which extend the entire length of the pipe rack and are supported by the side plates for limited pivotal motion. Handles 110 and 112 (seen in FIGURE 3) are mounted on gate rods 106 and 108, respectively, to permit manual pivotal motion of the rods. Mounted along gate rod 106 are a pair of gates 114. In the position shown in FIGURE 4, the gates 114 prevent pipe sections from moving out of the third row 92 into the pick up position 96.

Gates 114 can be seen to have an arcuate end 116 to engage the lowermost pipe section in the third row. When the pipe SUBSTITUTE SHEET (RULE 26) WO 96/26349 PCTIUS96/02354 sections in the third row 92 are to be used, the handle 110 is manually moved to pivot rod 106 so that the gates 114 move in a direction away from the block plates 98 (counterclockwise in FIGURE permitting the pipe sections in the third row to fall onto the guide 94 for movement into the pick up position 96 by gravity. Gates 114 can be seen to have an actuate side 118 which assists the movement of the pipe sections to the pick up position.

Gate rod 108 similarly supports a pair of gates 120 which can be used to prevent pipe sections from the second row from moving into the pick up position 96. Gates 120 have a convex surface 122 which engages the pipe sections in either the second row or those pipe sections permitted to pass gates 114 from the third row to prevent the pipe sections from moving into the pick up position.

However, if pipe sections from the second or third rows are to be permitted to move to the pick up position, the handle 112 can be moved to pivot the rod 108 away from the block plates 98 (counterclockwise in FIGURE 4) to move convex surfaces 122 out of engagement with the pipe sections.

Gates 120 have actuate sides 124 to facilitate movement of the pipe sections by gravity into the pick up position.

Either handle 110 or 112 can be manipulated to stop supply of pipe sections from the second or third rows even before the rows have been emptied by moving the respective gate at least part way back to the blocking position until the pipe sections between the gates and the pick up position have been moved out of the pipe rack and then moving the gates to the final blocking position, as seen in FIGURE 4.

A number of rubber straps 126, as seen in FIGURES 4 and 4A, can be mounted within the pipe rack 80 to slow the fall of pipe sections within the rows to prevent pipe damage.

The pipe rack 80 has the same volume of space as the pipe rack 16 but will carry a greater number of pipe sections. In operation, pipe sections are delivered to the return position 104 and directed by the manually positioned selectors 100 and 102 to one of the three vertical rows 88, SUBSTITUTE SHEET (RULE 26) WO 96/26349 PCT[US96/02354 11 and 92. Gravity propels the pipe section to the bottom of the row. When removing pipe from the rack, the selection of a particular row to be used is accomplished by the manual rotation of the handles 110 and 112 as noted.

The first row 88 connects directly with the pick up position 96 and has no gates associated therewith. After the pipe sections inthe first row 88 are used, it is preferable to move handle 112 to permit the pipe sections in the second row 90 to next be used. Finally, the handle 110 is activated to allow the pipe sections in the third row 92 to be used. When all rows are emptied, the emptied pipe rack 80 can be off loaded from the support frame 12 and a full rack installed. The process is reversed when performing a backreaming or pullback function.

FIGURE 5 is a cross-sectional view of a pipe rack 130 which is a modification of pipe rack 80. Pipe rack 130 is identical with pipe rack 80 with the exception of the use of gates 132 and 134 which each have convex ends 136 to engage the pipe sections in the second and third rows to prevent them from moving to the pick up position.

FIGURE 6 is a cross-sectional view of a pipe rack 140 which is a modification of pipe rack 80. In pipe rack 140, only two rows, rows 142 and 144 are used. This requires the use of only a single pair of gates 146 with convex ends 148.

FIGURES 5 and 6 permit the location of the positioning and gripper location in a new position or several different positions 150, 152, 154 in the case of- FIGURE 5 and 156 and 158 in the case of FIGURE 6 to permit the loading and carrying of a greater number or quantity of drill pipe.

For the embodiment shown in FIGURES 3-6, the loading sequence to load pipe sections from the rack to the drill string would be as follows: 1. extend gripper to pick up position in rack; 2. pick up pipe section in pick up position; SUBSTITUTE SHEET (RULE 26) WO 96/26349 PCT/US96/02354 12 3. retract grippers and gripped pipe section; 4. rotate grippers and gripped pipe section to spindle center line; 5. retract grippers after pipe section is threaded into drill string; and 6. rotate grippers to pick up position to pick up next pipe section.

To remove pipe from the drill string and return it to the rack the unloading sequence would be: 1. rotate grippers to spindle center line; 2. extend grippers to grip pipe section to be removed from drill string; 3. rotate grippers and gripped pipe section to return position in rack; and 4. retract gripper from pipe section.

The pipe sections will fall by gravity to the pick up position through the vertical rows.

With reference now to FIGURES 7 and 8, an automatic pipe handling device 160 forming a second embodiment of the present invention is illustrated. The device 160 is mounted on drill rig 14 by bolting to a pair of brackets 162 on the drill rig frame. Plates 162, in turn, mount pipe rack brackets 166. A hydraulic motor 168 is bolted to the drill rig and rotates a longitudinal shaft 170 about an axis 172 which is parallel to the spindle axis 24. Mounted along the longitudinal shaft 170 are a pair of hydraulic cylinders 28 and 30 as used in device including spring loaded pipe grippers with fixed fingers 33 and spring loaded fingers Each of the pipe rack brackets 166 can be seen to define an arcuate path 172 with a closed lower end 174 and an open upper end 176. The actuate path 172 and the pipe rack brackets 166 combine to form a curved row to receive and store pipe sections 18. In the particular case illustrated in FIGURES 7, 8 and 9, the pipe rack is capable of storing ten pipe sections.

As will be apparent from FIGURE 7, the hydraulic motor 168 is capable of pivoting the longitudinal shaft 170 SUBSTITUTE SHEET (RULE 26) WO 96/26349 PCT/US96/02354 13 to position the spring loaded pipe grippers at any selected position along an arc extending from a first position 178 for installing and retrieving pipe sections from the spindle axis 24 to a final position 180 where the pipe grippers are positioned to pick up the very last pipe section in the pipe rack.

With reference to FIGURE 7, if the operator begins with a full rack of pipe sections, the cylinders 28 and 30 are activated to retract the pipe grippers and the hydraulic motor 168 pivots the longitudinal shaft to position the pipe grippers in the pick up position 182 adjacent the first pipe section in the pipe rack. The cylinders 28 and 30 are then activated to extend the pipe grippers to grip the first pipe section in the pipe rack.

The hydraulic motor 168 is then activated to pivot the longitudinal shaft 170 and pivot the pipe grippers and gripped pipe section into the first position 178, where the pipe section will be centered on the spindle axis 24 to be threaded into the drill string. Once threaded into the drill string, the cylinders 28 and 30 can be activated to retract the pipe grippers away from the pipe section. The hydraulic motor is then activated to pivot the longitudinal shaft 170 to position the pipe grippers adjacent the next pipe in the pipe rack. The pipe grippers will then be extended by cylinders 28 and 30 to grasp the next pipe and hydraulic motor 168 will be activated to move that pipe section into alignment with the spindle axis 24. As can be understood, the device will operate to remove each pipe section in sequence held on the pipe rack until the final pipe section at the final position 180 is delivered for insertion in the drill string.

As the drill string is being disassembled, the operation of the device 160 is simply reversed. The pipe grippers will grip the first section of pipe at the spindle axis 24 and can move it to the next open position along arcuate path 172 on pipe rack brackets 166 for storage before retracting the cylinders 28 and 30 to move the pipe grippers out of engagement with the pipe section. The SUBSTITUTE SHEET (RULE 26) WO 96/26349 PCT/US96/02354 14 operation will continue until all the pipe sections have been replaced in the pipe rack.

The loading sequence of operation for the device illustrated in FIGURES 7-8 will be for putting pipe sections in the drill string: i. extend grippers to top most pipe section in rack; 2. pick up top most pipe section in rack; 3. rotate grippers and gripped pipe section to spindle center line to install in drill string; 4. retract grippers; and rotate grippers to next top most pipe section in rack and repeat above sequence.

To remove pipe sections from the drill string and return them to the rack the unloading sequence would be: 1. rotate grippers to spindle center line; 2. extend grippers to grip pipe section in drill string to be removed; 3. rotate grippers and gripped pipe section to deposit the pipe section on top of the top most pipe section already in the rack, or the bottom of the path 172 if this is the first pipe section being returned; 4. retract grippers; and rotate grippers to spindle center line to pick up next pipe section to be removed from the drill string.

With this device, the pipe sections are not dropped by gravity but are placed on top of the previously positioned pipe section or, if the first pipe section in the rack, at the bottom of the path 172.

It will be appreciated that the adjustment plates 164 have elongated bolt holes 184 which will permit some adjustment of the position of the pipe rack brackets 166 relative to the drill rig 14 and the spindle axis 24. As seen in FIGURES 8 and 9, a stow lock 187 is pivotally SUBSTITUTE SHEET (RULE 26) WO 96/26349 PCT/US9602354 mounted on each of the pipe rack brackets and can be pivoted over the open upper end 176 of each bracket and pinned in that position by pins 188. This will prevent inadvertent removal of the pipe sections during transport of the drill rig.

The hydraulic motor 168 does not specifically index the pipe grippers to any pick up position or return position. The pipe sections are, however, picked up from the top of the pipe rack brackets near the open upper end 176 to the bottom of the pipe rack brackets near the closed lower ends 174 in sequence and are returned in opposite order. It is preferable to move the pipe section along the arcuate path 172 and into contact with the next adjacent pipe section in the rack before removing the grippers to avoid allowing the pipe sections to fall by gravity along the arcuate path.

The device of the present invention can be operated by a single individual with only two controls.

The first control will operate the hydraulic drive motor 26 or 168 and the second control will operate the hydraulic cylinders 28 and 30 to grab the pipe sections with the pipe grippers 32. The device therefore permits the operator to automatically move drill pipe from the pipe rack carried on the boring device to the spindle center line as the drilling progresses. After completion of the pilot bore and while backreaming and pulling back services, the device will automatically unload the drill pipe from the spindle center line and return the drill pipe to the pipe rack. By designing the pipe racks to be readily installable on and removable from the support frame 12, as many pipe sections as required can be quickly provided. This design permits the number of people in an operating crew for the boring machine to be reduced from three to two.

The device also improves the function, productivity and safety of the drill rigs used by the guided boring industry. The operator, by moving two hydraulic valve levers, has complete control of the pipe loading and unloading operation. The device is easily understood and easy to operate. The operator can remain at SUBSTITUTE SHEET (RULE 26) WO 96/26349 PCTllS96/02354 16 the console to operate the device. The smoothness of the operation permits the operator to load and unload drill pipe at the spindle very efficiently. This improved smoothness and efficiency results in less time spent adding to and removing drill pipe from the drill string, thus reducing time spent on the job. The mechanical device removes the need for another person on the crew to remove drill pipe from a pipe box and load or unload at the spindle. The safety aspects of the device remove the possibility of injury by eliminating the need to lift and load the drill pipe by hand and eliminating the need for an additional crew member to lift and load the drill pipe.

With reference now to FIGURES 10-21, a pipe handling device 200 forming another embodiment of the present invention is illustrated. With reference to FIGURES 14-16, the device includes a pipe box 202 for storage of pipe sections 18. Pipe box 202 is mounted to the drill rig 14 at mounting points 204 and 206 so that the elongate axis 208 of the pipe box is parallel to the spindle axis 24. The pipe box includes a rectangular bar 210 with bottom plates 212 mounted thereon near each end of the bar. Side plates 214 and 216 extend upwardly from either side of the bottom plates and an end plate 218 connects the upper ends of the side plates at each end of the box. Preferably, corner plates 220 (FIGURE 16) are mounted between the bottom plate and each of the side plates, as seen in FIGURE 16. The distance X between the side plates is sufficient to accommodate a number of pipe sections 18 side by side, for example, three or four. The pipe sections are preferably stored in a stack determined manner. For example, the lowest row may be three pipe sections side by side. The next or second row on top will be four pipe sections wide, with the outer pipe sections of the second row naturally fitting between the side walls and the outer pipe sections just below in the lowest row. The inner pipe sections on the second row naturally fit between adjacent pipe sections in the lowest row. The third row would then be three pipe sections wide, fitting between adjacent pipe sections in the second row. Such a SUBSTITUTE SHEET (RULE 26) WO 96/26349 PCT[US96/02354 17 configuration is illustrated in FIGURE 16. Simply put, as a pipe section is placed in the pipe box on pipe sections already there, it will naturally pick a stable position nested between adjacent pipe sections in the next lower row or between a side wall and the pipe section adjacent the side wall in the next lower row. The height Y of the box is sufficient to accommodate a number of pipe sections vertically, for example, eight. In one embodiment, the pipe sections are held in alternating rows of three and four pipe sections from the bottom to the top of the box along the Y direction. The pipe sections can enter and leave the box through the top of the pipe box between the side plates and end plates. The side plates prevent the pipe sections from rolling out of the box. The bottom plates support the lowest row of pipe sections. Typically, the pipe sections used will be of a type having upset ends, that is ends that have a larger diameter than the intermediate portions of the pipe sections, providing sufficient space between each pipe section for the pipe section to be gripped in a manner discussed hereinafter.

As seen in FIGURE 21, removable end panels 219 at either end of pipe box 202 normally hold the pipe sections from falling out the ends of the pipe box, but can be removed by lifting out retaining pin 221 to allow access for removal of thread and dust protective caps (not shown) typically installed on the ends of each pipe section 18.

The bottom end panel 219, for the lower end of pipe box 202 when it is installed on an inclined boring unit 14, is offset and reversible. Once reversed, the offset restrains the pipe sections 18 from sliding down toward the lower end of box 202 after the protective caps are removed. When the bore is completed and the pipe box 202 is ready for transport from the job site, the end panels can be removed for installation of the protective caps. Bottom panel 219 is now reversed to its original (storage) position to clear the added length of the protective caps.

With reference to FIGURES 10-13, the device 200 also includes a pipe loader 222 which is mounted on top of the pipe box 202 and secured thereto. The pipe loader SUBSTITUTE SHEET (RULE 26) WO 96/26349 PCT/US96/02354 18 includes a rear pivot mount 224 and a front pivot mount 226. With reference to FIGURES 14 and 17, pivot mount 224 can be seen to have vertical rods 228 at each side thereof which extend downwardly and are received within sockets 234 mounted on side plates 214 and 216 at the rear of the pipe box. Similarly, the front pivot mount has rods 232 which mount through sockets 230 on the side plates 214 and 216 at the front of the pipe box.

A rotation member 236 is mounted between the pivot mounts 224 and 226 to pivot about pivot axis 238 which, when the pipe box 202 is mounted on the drill rig, and the pipe loader 222 is mounted on the pipe box, is also parallel the spindle axis 24. Mounted along the rotation member 236 are a pair of lifting eyes 240 which permit the pipe loader 222 to be lifted off of the pipe box. It is preferable to do so before the pipe box is detached from the rig.

Also mounted on rotation member 236 are a pair of cylinder mount tubes 242 which each mount a double acting extension cylinder 244. A pair of guide tubes 246 are also mounted on the rotation member and receive the guides 248 of an extension frame 250. The ends of the pistons of extension cylinders 244 are mounted to the extension frame at points 251.

At each end of the extension frame is mounted a pipe gripper 256 which includes a fixed finger 258 and pivoting finger 260. The finger 260 is pivoted by the piston of a double acting gripper cylinder 262. The cylinder 262 is supported on the extension frame 250 at the outer ends of the cylinder supports 252 and 254 mounted to frame 250.

With reference to FIGURES 17-20, the rear end of the rotation member 236 has a pair of stop pins 264 mounted thereon. A pivot adjustment stop 266 is mounted to the rear pivot mount 224 by bolts. The bolt holes 267 in the stop allow for limited pivotal motion about the axis 238 before tightening the bolts. The pivot adjustment stop has stop surfaces 268 and 269 which engage the stop pins 264 to SUBSTITUTE SHEET (RULE 26) WO 96/26349 PCT/US96/02354 19 confine the pivotal motion of the rotation member to a predetermined angle, for example 65 degrees.

A double-acting pivot cylinder 270 is pivotally mounted to the rear pivot mount 224 on pivot 272. The piston 276 of cylinder 270 is pivotally mounted to one end 277 of a rotation arm 278. The other end of rotation arm 278 has a pin 279 extending in the end of rotation member 236 which is secured to the end of the rotation member 236 by a key. Thus, extension and retraction of the piston 276 within the cylinder 270 will cause pivotal motion of the member 236 between the limits permitted by the pivot adjustment stop 266.

With reference to FIGURE 13, the hydraulic connections in the pipe handling device 200 can be described. The hydraulics will normally be powered from a hydraulic pump on an accessory power system (not shown), but can be powered from another source. Also, hydraulic operation can be replaced by compressed air operation or other suitable drive mechanism. A control valve assembly 280 is provided which includes at least three control valves 282, 284 and 286 controlled respectively by control handles 288, 290 and 292. Valve 282 is connected through lines 294 and 296 to the double-acting rotation or pivot cylinder 270. The lines 294 and 296 pass through a check valve unit 298. Thus, activation of the handle 288 in opposite directions will cause the piston of cylinder 270 to extend and retract, pivoting the rotation member with the pipe grippers mounted thereon. When the rotation member has been pivoted to the desired position, the check valve 298 will maintain the member in that position when the handle is released.

Lines 300 and 302 extend from the valve 284 to the double-acting extension cylinders 244 to extend or retract the extension frame 250 relative the rotation member 236. A check valve 304 is utilized to maintain the position of the extension frame 260 after lever 290 is released. A flow divider 306 is preferably utilized to insure uniform motion of the pistons in the cylinders 244 SUBSTITUTE SHEET (RULE 26) WO 96/26349 PCT/US96/02354 so that the extension frame 250 does not jam as it is moved relative the rotation member 236.

Lines 308 and 310 extend from the valve 286 to the gripper cylinders 262. Thus, activation of the handle 292 will alternatively open the grippers or close-the grippers about a pipe section. A check valve 312 maintains the position of the grippers when the handle is released.

The pipe handling device 200 enables the operator to move pipe joints or segments from the pipe box 202 to the drill unit for the purpose of adding pipe segments to the drill string as the boring operation progresses. Once the initial boring process or pilot bore is complete, the pipe handling device 200 enables the operator to sequentially remove pipe from the drill string and return it to the pipe box 202.

When boring or drilling the initial pilot hole with the drill unit, the operator must sequentially add more drill pipe segments to the drill string as it advances in the ground. This involves operations known in the art such as drilling forward, breaking connection with the drill string, retracting the drill unit carriage, adding another pipe segment to the drill string, and resuming the boring process. The pipe handling device 200 assists in the operation of obtaining and positioning the added pipe segments so that it can be threaded into the drill string.

Once the bore is completed, the pipe handling device 200 assists in the operation of moving the pipe segments back to the pipe box.

In the drilling process, to load another pipe, the operator operates the three valves 282, 284 and 286 in sequence or in combination. The pivot cylinder 270 is used to rotate the rotation member and pipe grippers toward the desired pipe section in the pipe box. The extension cylinders 244 are used to telescope the extension frame 250 with the pipe grippers toward the selected pipe segment within the pipe box. The gripper cylinders 262 are actuated to close the gripping fingers 258 and 260 around the selected pipe section. The device can grasp any pipe section in the top row of the pipe box, although the SUBSTITUTE SHEET (RULE 26) WO 96/26349 PCTIUS9602354 21 operator will generally choose the one most accessible, typically the one closest to the drill unit. The stroke of extension cylinders 244 will be long enough to grasp pipe sections at the bottom of the pipe box.

Once the pipe section is gripped, it is moved above the pipe box by a combination of rotation of the member 236 by the pivot cylinder 270 and retraction of the extension cylinders 244 so that the pipe section at least clears the top of the side plates. With the pipe section now above the pipe box, the pivot cylinder 270 is actuated to pivot the rotation member into alignment with the spindle axis 24. This alignment can be set by the pivot adjustment stop 266. Assuming the drill unit is ready to receive another pipe section, the operator can extend the extension cylinders 244 to move the gripped pipe section into coincidence with the spindle axis 24. The operator then moves the carriage of the drill unit forward so that the spindle engages the top hole end of the pipe section and begins to rotate the spindle to thread the connection together. Then the spindle is advanced, sliding the pipe section through the grippers to engage the other end of the pipe section with the drill string, and make that connection. The gripper cylinders 262 are then actuated to release the pipe section and the extension cylinders are actuated to move the extension frame 250 away from the installed pipe section. The pivot cylinder 270 can then pivot the rotation member 236 to pick up the next pipe section in the pipe box. If the bore is longer than the amount of pipe in the pipe box, the pipe loader 222 can simply be released from and lifted off the empty pipe box and a loaded pipe box is substituted. The pipe loader 222 can then be lowered onto and secured to the full pipe box to continue the drilling operation.

The unloading process is essentially the reverse of the loading process. The pipe box will be at least partially empty. The carriage on the drill unit is moved back to pull the drill string from the hole, and the first pipe section in the drill string is broken free of the string. The pipe handling device 200 is positioned so that SUBSTITUTE SHEET (RULE 26) WO 96/26349 PCT/US96/02354 22 the pipe grippers 256 will engage that pipe section. This engagement can be done before the threaded connections are broken or after. The carriage is moved back enough to disengage the bottom threads of the pipe section, if necessary, sliding the pipe section through the grippers a short distance. The spindle is further rotated and retracted to disengage from the top end of the pipe section. Then the operator can move the pipe section back to the pipe box in the reverse motion from installation.

This is done first by retraction of the extension cylinders 244 and followed by actuation of the pivoting cylinder 270 to pivot the rotation member and suspend the pipe section above the pipe box. The extension cylinders 244 are then extended to lower the pipe section into the box to the position selected by the operator. The gripper cylinders 262 are actuated to release the pipe section and the pipe will drop in place within the box as determined by the stack of pipe already there. Preferably, the operator will not drop the pipe from too high above the existing stack of pipe so that the released pipe section does not become diagonally wedged inside instead of conforming to the stack. The process continues until the last pipe section has been withdrawn from the borehole.

In pipe handling device 200, the operator is involved in the process of deciding which pipe to pick up and where to return it. The operator also has to exercise judgment on how far to extend the extension cylinders 244 in order to line up the pipe with the spindle axis, although rotation to that position with the pivoting cylinder is controlled by the pivot adjustment stop 266.

Thus, the device is less of an automatic pipe handling device and performs primarily as a mechanical aid to reduce the manual labor involved in the drilling process. The pipe handling device 200, while disclosed to be mounted on the drill unit, could be supported separately from the drill unit. Further, the pipe loader 222 can, itself, be supported separately from the pipe box 202. For example, pipe handling device 200 might be mounted on a pipe trailer positioned next to the drill unit. One can also appreciate SUBSTITUTE SHEET (RULE 26) WO 96/26349 PCTfUS96/02354 23 that there are multiple ways to implement the rotation and extension/retraction actions performed by cylinders 244 and 270. For example, the two extension cylinders 244 can use the flow divider 306 to cause them to extend equally. This could be accomplished with a pair of timed ball screws, rack and pinion or the like.

In addition, supports can be mounted on the drill unit itself to receive the pipe sections from pipe handling device 200. These supports would be positioned on the spindle axis to align the pipe section directly. These can be configured to swing away or retract when the carriage on the drill unit advances in the drilling process. This would make alignment of axes 24 and 238 less critical and facilitate mounting the device 200 or loader 222 separate from the drill unit.

Among the significant advantages of pipe handling device 200 is its ability to pick up and return a pipe section to any location within the pipe box. The pipe loader 222 is also easily movable from one pipe box to another, an important factor when longer distance boreholes are drilled. Pipe loader 222 can also be used independently of pipe box 202 if a source of pipe sections within reach of the pipe grippers is provided. Further, the pipe handling device 200 lends itself to retrofitting on older drill units already in service. Also, the use of the pivot adjustment stop 266 insures that the extension of cylinders 244, occurring in a single plane approximately intersecting and parallel to the spindle axis 24 means that the operator need only operate this single function to achieve alignment with the spindle axis. This makes the process easier to accomplish. Typically, the extension cylinders will have to have sufficient capability to extend further than the spindle axis because this extended reach is necessary to reach the bottom row of pipe sections in the pipe box.

Although the present invention has been described with respect to a specific preferred embodiment thereof, various changes and modifications may be suggested to one skilled in the art, and it is intended that the present SUBSTITUTE SHEET (RULE 26) invention encompass such changes and modifications as fall within the scope of the appended claims.

Throughout the specification, unless the context requires otherwise, the word "comprise" or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers.

iii* *i 9* 9*9t6 o 9

Claims (77)

11. FEB. 2000 17:13 WRAY ASSOCIATES NO. 4302 P. 7/15 25/1 THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS 1. A machine requiring receipt of elongate objects, the machine having a handling device for storing and transporting the elongate objects to and from the machine, wherein the handling device comprises; a magazine attached to the machine and adapted to store a plurality of elongate objects; and a handling assembly adapted to transport at least one elongate object to and from the magazine and the machine, wherein the magazine is adapted to passively position the plurality of elongate objects in the 10 magazine as the handling assembly removes an elongate object from the magazine or places an elongate object in the magazine. 2. The machine of claim 1, wherein the magazine is detachably attached to the machine. 3. The machine of claim 1 or 2, wherein the machine is a pipe handling device for storing and transporting pipe sections to and from a generally horizontal boring machine having a drill string rotatable about an axis of rotation, the pipe handling device comprising the magazine, the handling assembly being a pipe handling assembly, the elongate object being a pipe, the pipe handling assembly comprising a rotation member and at least one pipe holding member supportable on the rotation member, the pipe holding member adapted to transport the at least one pipe section to and from the horizontal boring machine. 4. The machine of claim 1 or 2, wherein the machine is a generally horizontal boring machine having a drill string rotable about an axis of rotation, the handling device being a pipe handling device for storing and transporting Spipe sections to and from the horizontal boring machine, the pipe handling 11/02 '00 FRI 20:02 [TX/RX NO 7384] 11. FEB. 2000 17:13 WRAY ASSOCIATES NO. 4302 P. 8/15 25/2- assembly comprising a rotation member and at least one pipe holding member supportable on the rotation member, the pipe holding member adapted to transport the at least one pipe section to and from the horizontal boring machine. 5. The machine of claim 1 or 2, wherein the handling assembly comprises a rotation member and at least one holding member supportable on the rotation member. 6. The machine of any one of claims 1 through 5 wherein the handling assembly further comprises: 10 a frame; and wherein the rotation member comprises a pivot member having an axis of rotation, the pivot member rotatably supportable on the frame; wherein the holding member is supportable on the pivot member; wherein the holding member is adapted to receive and release at least one of the plurality of elongate objects; and 11/02 '00 FRI 20:02 [TX/RX NO 7384] wherein rotation of the pivot member causes pivotal movement of the holding member about the pivot member axis and movement of an elongate object to and from the machine. 7. The machine of claim 6 wherein: the pivot member comprises a shaft rotatably supportable on the frame; the holding member is supportable on the shaft and adapted for movement between a first position and a second position, wherein in the first position an elongate object is receivable in the holding member and in the second position an elongate object is releasable from the holding member. 8. The machine of claim 6 wherein the magazine defines a return position and wherein the holding member is adapted to return the elongate object to the magazine at the return position. 9. The machine of claim 6 wherein the handling assembly further comprises: S* a pivot member drive mechanism adapted to rotate the pivot member to position the holding member for receipt and S: .release of an elongate object; and a holding member drive mechanism adapted to drive the movement of the holding member in a direction generally perpendicular to the axis of rotation of the pivot member. The machine of claim 9 wherein the pivot member drive mechanism comprises a hydraulic motor. 11. The machine of claim 9 wherein the pivot member has first and second ends and the pivot member drive mechanism comprises: a hydraulic cylinder having a piston, the hydraulic cylinder supported on the frame of the handling assembly; and a rotatable arm coupling the piston of the hydraulic cylinder with the pivot member, the arm having a fixed end and a free end; wherein the fixed end of the arm is rotatably supported at the second end of the shaft; wherein the piston of the hydraulic cylinder is connectable to the free end of the rotatable arm such that activation of the piston causes rotation of the rotatable arm, thereby rotating the shaft and causing movement of the holding member.

12. The machine of claim 6 wherein the pivot member further comprises a pivot adjustment assembly adapted to confine the rotation of the pivot member to a predetermined angle.

13. The machine of claim 12 wherein the pivot adjustment assembly comprises: a pin supported at the one end of the pivot member in axial alignment therewith; and a pivot adjustment stop supported on the pivot member, the pivot adjustment stop defining a stop surface adapted to engage the pin and confine rotation of the pivot member to a predetermined angle.

14. The machine of claim 6 wherein the frame further comprises a mounting assembly adapted to pivotally support the pivot member. The machine of claim 9 wherein the holding member drive mechanism comprises a hydraulic cylinder having a piston, the hydraulic cylinder being mounted on the pivot member, and wherein the holding member is mounted on the piston for movement of the holding member between a retracted position and an extended position.

16. The machine of claim 6 wherein the holding member .:comprises a gripping member. c17. The machine of claim 16 wherein the gripping member comprises a fixed finger and a movable finger. S"

18. The machine of claim 17 wherein the movable finger further comprises a biasing member adapted to urge the gripping member into contact with the elongate object to be received and to release the elongate object. cmrea19. The machine of claim 17 wherein the movable finger further comprises a hydraulic cylinder having a piston adapted to actuate the moveable finger to retrieve and release an elongate object.

20. The machine of claim 16 wherein the gripping member S° further comprises a guide member adapted to ensure movement of the gripping member in a direction perpendicular to the axis of the pivot member. 00 S"

21. The machine of claim 20 wherein the guide member comprises: brackets mounted on the hydraulic cylinder; and guide shafts slidably received within the brackets perpendicular to the pivot member.

22. The machine of claim 17 further comprising a detent device adapted to confine rotation of the shaft between a first position and a second position.

23. The machine of any one of claims 1 through 5 further comprising a mounting assembly adapted to removably connect the magazine to the handling assembly.

24. The machine of claim 23 wherein the magazine and the handling assembly define corresponding apertures and the machine further comprises a fastener removably received in the corresponding apertures. The machine of any one of claims 1 through 5 further comprising a mounting assembly adapted to removably connect the handling assembly to the machine.

26. The machine of claim 23 wherein the magazine further comprises a handle.

27. The machine of claim 26 wherein the magazine further comprises opposed ends and wherein the opposed ends define a plurality of recesses for receiving a sling.

28. The machine of claim 26 wherein the magazine further defines opposing apertures adapted to receive a sling. go go

29. The machine of claim 23 wherein the pipe handling device of the machine further comprises a handle.

30. The machine of claim,29 wherein the pivot member defines apertures adapted to receive a handle.

31. The machine of any one of claims 1 through 5 wherein the magazine further comprises a removable end adapted to permit access to the plurality of elongate objects through the open end of the magazine.

32. The machine of any one of claims 1 through 5 wherein the magazine further comprises a removable end adapted to permit access to the plurality of elongate objects through the open end of the magazine and wherein the removable end is reversible and further defines a first side and an inverted second side, the inverted second side adapted to prevent axial movement of the S"plurality of elongate objects when the reversible end is installed on the magazine with the inverted second side facing inward.

33. The machine of any one of claims 1 through 5 wherein the magazine further comprises a mounting assembly adapted to position the handling assembly laterally adjacent the magazine.

34. The machine of claim 6 wherein the handling assembly further comprises an extension assembly supported on the pivot member, the extension assembly adapted to move the holding member between an extended position and a retracted position. The machine of claim 34 wherein the extension assembly comprises: an extension arm supported on the pivot member in axial alignment therewith; and a drive assembly adapted to drive the movement of the extension arm; wherein the holding member is supported on the extension assembly.

36. The machine of claim 35 wherein the drive assembly comprises: a hydraulic cylinder having a piston; wherein the hydraulic cylinder is supported on the pivot member and the extension arm is connected to the piston; wherein actuation of the hydraulic cylinder affects extension and retraction of the extension arm.

37. The machine of claim 36 wherein the pivot member further comprises a mount tube adapted to mount the hydraulic cylinder of the drive assembly of the extension assembly to the pivot member.

38. The machine of claim 35 wherein the extension arm further comprises a guide and the pivot member further comprises a guide housing, the guide housing adapted to receive the guide and ensure movement of the extension arm in a direction perpendicular to the axis of the pivot member.

39. The machine of claim 7 wherein the handling assembly further comprises a friction member adapted to prevent axial sliding of the elongate object. The machine of claim 39 wherein the friction member comprises a resilient material. 41 The machine of any one of claims 1 through 5 further comprising a friction member adapted to prevent axial sliding of the elongate object and wherein the friction member comprises a roller adapted to permit rotation of the elongate object.

42. The machine of any one of claims 1 through 5 wherein the handling assembly further comprises: a frame; wherein the rotation member comprises a pivot member, the pivot member rotatably supportable on the frame; wherein the holding member is supportable on the pivot member; wherein the holding member is adapted to receive and release at zleast one of the plurality of elongate objects; and 11. FEB. 2000 17:13 WRAY ASSOCIATES NO. 4302 P. 9/15 -30/1 wherein rotation of the pivot member causes the holding member to shuttle linearly to and from the handling device.

43. The machine of claim 42 further comprising an arm characterized by the ability to operatively connect the holding member to the pivot member.

44. The machine of claim 43 wherein the holding member comprises an arcuate shaped member. The machine of claim 43 further comprising a retainer adapted to retain an elongate object in the holding member.

46. The machine of claim 45 wherein the retainer further comprises a spring adapted to urge the retainer into contact with the elongate object.

47. The machine of any one of claims 1 through 5 wherein the handling assembly comprises a frame adapted to retract the handling assembly to a position enabling manual loading and unloading of elongate objects to and from the machine which is a horizontal boring machine. 15 48. The machine of any one of claims 1 through 5 wherein: the magazine further defines a removal position and a return position; the handling assembly is adapted to retrieve elongate objects from the magazine at the removal position and returns elongate objects to the magazine at the return position; and wherein a plurality of elongate objects fall by gravity from the return position to the removal position.

49. The machine of claim 48 wherein the magazine further defines a track adapted to guide the plurality of elongate objects from the return position to 11/02 '00 FRI 20:02 [TX/RX NO 7384] It. FEB. 2000 17:13 WRAY ASSOCIATES NO. 4302 P. 10/15 30/2 the removal position. The machine of claim 49 wherein the track defines a circuitous path.

51. The machine of claim 49 wherein the track defines a columnar path.

52. The machine of claim 49 wherein the magazine further comprises an elongate object retainer near the removal position, the elongate object retainer adapted to retain the plurality of elongate objects in the track until the elongate objects are removed from the magazine.

53. The machine of claim 49 wherein the magazine further a a. a 9 @0 a. a *9 a. a a a a. a 90 *0 a a a *.aa a. a. a 9 a 4 a 4 11/02 '00 FRI 20:02 [TX/RX NO 7384] comprises: a plurality of tracks, wherein each of the plurality of tracks has an open base end continuous with the removal position and an open upper end continuous with the return position; and a track selector mounted near the open upper ends of the plurality of tracks, the track selector adapted to be selectively positioned to guide an elongate object into the selected track as the elongate object falls by gravity from the return position to the removal position.

54. The machine of claim 53 wherein the magazine further comprises a handle adapted to permit manual positioning of the track selector. The machine of claim 53 wherein the magazine further comprises a blocking member mounted at the open base end of each of the plurality of tracks, excepting the track nearest the removal position, and wherein the blocking member is adapted to be positioned alternatively to block or to permit the passage of the plurality of elongate objects from the track nearest which it is mounted, so that the plurality of elongate objects first are retrieved from the track nearest the removal position and subsequently retrieved from the remaining plurality of tracks by selectively positioning each of the blocking members.

56. The machine of claim 55 wherein the magazine further comprises a handle adapted to manually position the blocking members.

57. The machine of claim 55 wherein the blocking members define a concave surface adapted to block the passage of the plurality of elongate objects.

58. The machine of claim 57 wherein the blocking member further defines a second concave surface adapted to assist the movement of the elongate objects to the removal position when the blocking member is positioned to permit the passage of the plurality of elongate objects.

59. The machine of claim 54 wherein the blocking member defines a convex surface adapted to block the passage of the plurality of elongate objects. The machine of claim 48 wherein the magazine further comprises a pipe protection member adapted to minimize damage to the plurality of elongate objects as they fall by gravity from the return position to the removal position.

61. The machine of claim 60 wherein the pipe protection member comprises a plurality of rubber straps mounted inside the magazine, the rubber straps adapted to cushion the plurality of elongate objects as they fall 11. FEB. 2000 17:13 WRAY ASSOCIATES NO. 4302 P. 11/15 -32/1 by gravity from the return position to the removal position.

62. The machine of any one of the claims 1 through 5 wherein the magazine further comprises a frame adapted to store the plurality of elongate objects in an arcurate path.

63. The machine of claim 62 wherein the magazine further comprises a closed lower end adapted to support the plurality of elongate objects and an open upper end through which elongate objects are removed and returned to the magazine.

64. The machine of claim 63 wherein the handling assembly comprises: a frame; a pivot member rotatably supported on the frame for movement between the magazine and the machine which is a horizontal boring machine; and *eeo a holding member supported on the pivot member, wherein the 15 holding member is adapted to receive and release at least one of the plurality of elongate objects; wherein the shaft is adapted to remove and return elongate objects to the magazine at any selected position along the arcuate path The machine of claim 64 wherein the handling assembly further comprises a drive assembly adapted to rotate the pivot member to position the holding member at any selected position along an arcuate path extending from a first position, wherein the holding boring machine is positioned to receive or release an elongate object at the horizontal boring machine, to a final position, wherein the holding member is positioned to receive or release an 11/02 '00 FRI 20:02 [TX/RX NO 7384] 11. FEB. 2000 17:13 WRAY ASSOCIATES NO. 4302 P. 12/15 -32/2- elongate object at the closed lower end of the arcuate path.

66. The machine of any one of claims 1 through 5 wherein the magazine further comprises a frame adapted to store the plurality of elongate objects in a stack determined manner.

67. The machine of claim 66 wherein the width of the magazine is sized to accommodate a plurality of elongate objects side-by-side and the height of the magazine is sized to accommodate a plurality of stacked elongate objects such that the plurality of elongate objects are stored in an interstitial relationship. 10 68. The machine of claim 66 wherein the magazine further comprises a base, two sides, and an open top and wherein the handling assembly is positioned above the magazine and returns and retrieves the plurality of elongate objects through the open top of the magazine. S S **oO* 11/02 '00 FRI 20:02 [TX/RX NO 7384]

69. The machine of claim 68 wherein the magazine further comprises corner pieces mounted between the base and each of the sides of the magazine, the corner pieces adapted to strengthen the structural integrity of the magazine. The machine of claim 66 wherein the handling assembly comprises; a frame; a pivot member rotatably supported on the frame; a holding member supported on the pivot member, wherein the holding member is adapted to receive and release at least one of the plurality of elongate objects; and wherein the pivot member is adapted to position the holding member to permit removal and retrieval of the plurality of elongate objects from the magazine in any selected order.

71. The machine of claim 42 wherein the magazine further •comprises an open bottom and a plurality of pipe receiving columns adapted to store the plurality of elongate objects in generally parallel columns and wherein the plurality of elongate objects are accessed through the open bottom.

72. The machine of claim 71 wherein the magazine further comprises opposing sides defining a plurality of vertical support structures adapted to retain the plurality of elongate objects in vertical columns in the magazine.

73. The machine of claim 71 further comprising a mounting assembly adapted to connect the handling assembly beneath the magazine.

74. The machine of claim 43 wherein the handling assembly further comprises a drive assembly adapted to drive the movement of the arm. *o

75. The machine of claim 74 wherein the drive assembly comprises a rack and pinion gear assembly supported on the frame, the rack and pinion gear assembly adapted to extend and retract the arm laterally and perpendicularly to the axis of rotation of the pivot member.

76. The machine of claim 42 further comprising a pipe return assembly adapted to return the plurality of elongate objects into the magazine.

77. The machine of claim 76 wherein the pipe return assembly comprises: a return arm supported on the frame beneath the magazine, the return arm adapted to lift an elongate object into the magazine; and a drive assembly adapted to drive the movement of the return arm.

78. The machine of claim 76 wherein the drive assembly comprises: a hydraulic cylinder having a piston; and a link connecting the piston to the return arm; wherein extension of the piston causes the return arm to lift an elongate object into the magazine and retraction of the piston causes the return arm to lower.

79. The machine of claim 71 wherein the magazine further comprises a retainer adapted to retain the plurality of elongate objects in the magazine when the magazine is removed from the handling assembly. The machine of claim 79 wherein the magazine defines an aperture and further comprises a retaining pin removably received in the aperture, the retaining pin adapted to retain the plurality of elongate objects in the magazine when the magazine is removed from the handling assembly. h l81. The machine of claim 1 or 2 wherein the machine is a pipe S: handling assembly for use with a horizontal boring machine, the elongate objects are pipe sections, wherein the pipe handling assembly comprises: a frame; a transport member movably supportable on the frame and adapted to transport at least one of the plurality of pipe sections; o at least one pipe holding member supportable on the transport member; wherein the pipe holding member is adapted to receive and release •at least one of the plurality of pipe sections; and wherein the movement of the transport member causes the pipe :*:holding member to shuttle linearly to and from the horizontal boring machine.

82. The machine of claim 81 wherein the transport member comprises a rotation member and wherein rotation of the rotation member causes the pipe holding member to shuttle to and from the horizontal boring machine.

83. The machine of claim 81 further comprising an arm characterized by the ability to operatively connect the pipe holding member to the transport member.

84. The machine of claim 83 wherein the arm comprises the pipe holding member. The machine of claim 84 wherein the pipe holding member Scomprises an arcuate-shaped member.

86. The machine of claim 84 further comprising a retainer adapted to retain a pipe section in the pipe holding member.

87. The machine of claim 86 wherein the retainer comprises a spring adapted to urge the retainer into contact with the pipe section being transported.

88. The machine of claim 81 wherein the transport member is adapted to retract the holding member to a position enabling manual loading and unloading of pipe sections to and from the horizontal boring machine.

89. The machine of claim 81 further comprising a drive assembly adapted to drive the movement of the transport member. The machine of claim 89 wherein the drive assembly comprises a rack and pinion gear assembly supported on the frame, the rack and :"*:pinion gear assembly adapted to laterally extend and retract the transport member with respect to the boring machine.

91. The machine of claim 81 further comprising a pipe return assembly adapted to return at least one of the plurality of pipe sections into the magazine.

92. The machine of claim 91 wherein the pipe return assembly comprises: a return arm supported on the frame; and :a drive assembly adapted to drive the movement of the return arm; wherein when the pipe handling assembly is assembled with the magazine, the return arm is adapted to lift a pipe section into "the magazine. So 93. The machine of claim 92 wherein the drive assembly comprises: a hydraulic cylinder having a piston; and a link connecting the piston to the return arm wherein extension of the piston causes the return arm to lift a pipe section into the magazine and retraction of the piston causes the return arm to lower.

94. The machine of claim 91 wherein the pipe return assembly comprises: a return arm positionable beneath the magazine; and an extendable and retractable piston operative connectable to the return; wherein the extension and retraction of the piston causes the return arm to raise and lower at least one of the plurality of pipe sections into the magazine or from the magazine. II. FEB. 2000 17:14 WRAY ASSOCIATES NO. 4302 P. 13/15 -36- The machine of any one of the preceding claims wherein the machine requires receipt of elongate objects in a generally horizontal position.

96. The machine of any one of claims 1, 2, 5-46, 48-63, 66-80 wherein the machine is a horizontal boring machine.

97. A method for handling a plurality of pipe sections at a horizontal boring site and for use with a horizontal boring machine having a connecting position for connecting at least one of the plurality of pipe section, the method comprising the steps of: .storing the plurality of pipe sections in a storage position adjacent to the horizontal boring machine; during the boring phase, delivering at least one of the plurality of pipe sections from the storage position to a receiving position laterally adjacent the connection position, and transferring the delivered pipe section from the receiving position to 15 the connecting position of the horizontal boring machine; wherein transfer of the delivered pipe section is carried out exclusively by linear movement of the delivered pipe section between the receiving position and the connecting position.

98. The method of claim 97 wherein the step of transferring the delivered pipe section from the receiving position to the connecting position of the horizontal boring machine is carried by shuttling action.

99. The method of claim 97 wherein the step of transferring the pipe section from the receiving position to the connecting position of the horizontal boring machine is carried out at least in part by pivoting action. 11/02 '00 FRI 20:02 [TX/RX NO 7384] 11. FEB. 2000 17:14 WRAY ASSOCIATES NO, 4302 P. 14/15 -37-

100. The method of claim 97 wherein the steps of delivery and transfer of at least one of the plurality of pipe sections are repeated until the boring phase is completed.

101. The method of claim 97 further comprising the step of withdrawing the plurality of pipe sections from the connecting area of the horizontal boring machine.

102. The method of claim 101 wherein the step of withdrawing the plurality of pipe sections comprises the steps of: transferring a pipe section from the connecting position of the 10 horizontal boring machine to the receiving position; and returning the pipe section to the storage position.

103. The method of claim 102 further comprising the step of repeatedly transferring withdrawn pipe sections to the receiving position and returning the withdrawn pipe sections to the storage position until the withdrawal 15 phase is completed.

104. The method of claim 102 wherein the step of returning the pipe sections to the storage location is carried out by lifting the pipe sections from the receiving position into the storage position.

105. The method of claim 97 further comprising the steps of storing a plurality of groups of pipe sections near the horizontal boring machine and positioning the groups sequentially near the boring machine for delivery and transport to the horizontal boring machine.

106. The method of claim 97 wherein the step of delivering at least one of the plurality of pipe sections from the storage position to the receiving position is performed passively. 11/02 '00 FRI 20:02 [TX/RX NO 7384] 11. FEB. 2000 17: 14 WRAY ASSOCIATES NO. 4302 P. 15/15 38

107. A machine according to claim 1 substantially as herein described with reference to the accompanying drawings.

108. A method according to claim 97 substantially as herein described. SO 00 0 0 ago* 00000 000 Ob 0 11/02 '00 FRI 20:02 [TX/RX NO 7384]