JPH0466993B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tool for drilling wells, and more particularly to a locking mandrel for removably securing a device for controlling flow, such as a safety valve, in a flow conductor of a well. (lock
mandrel) and its operating device.

The standard method for drilling wells, especially oil and gas wells, is to complete the well using equipment and methods that use wire ropes, and wells dug using this method have extremely low operating costs. There is prior art regarding methods and apparatus for this net drilling process. Conventional lock mandrels for underground safety valves are of the suspended and extended type, but there are several problems when using them for safety valves. To install this extended suspension lock mandrel, remove the safety valve from the landing grip.
Apply force to this lock mandrel in the same direction as the force applied to the nipple). Since this downward driving force must be increased due to the friction of the seal between the safety valve and the landing nipple, there is a risk that the lock mandrel will be installed too quickly. If the pressure of the control device builds up where the locking mandrel is partially engaged in the recess, the operating device to which the locking mandrel is attached may suddenly come off. One way to prevent this is to use a spring-type separation device, but even if this solves the major problem, it still leaves the problem that the device does not operate completely. The fixing sleeve of this suspended extension fixing type is supposed to move in the opposite direction to the direction in which the safety valve is fixed. The flow of the well can then dislodge and lift this securing sleeve.

Therefore, it is a particularly important object of the present invention to provide a new and improved well-drilling device.

A second and particularly important object of the present invention is to provide a new and improved apparatus for use in a well by removably securing a device such as a safety valve to a landing nipple along the flow conductor of the well. There is a particular thing.

A third object of the invention is to provide a lock mandrel that can be operated by a hoisting line.

A fourth object of the present invention is to provide a lock mandrel that is installed with a force in the direction opposite to the force that drives the device to which the lock mandrel is attached, such as a safety device, into a landing nipple.

A fifth object of the present invention is to provide a locking mandrel that does not become locked too quickly and allows the application of any downward force.

A sixth object of the present invention is to provide a lock mandrel with a locking sleeve that moves in the direction of the flow of the well to secure the lock mandrel against dislodging in the well flow.

A seventh object of the present invention is to provide a lock mandrel from which an operating device can be removed from the lock mandrel after the safety valve, which is suitably connected to the lock mandrel, has been secured to the landing nipple.

An eighth object of the invention is to allow the safety valve control to be fully formed before the operating device can be removed from the lock mandrel.

According to the present invention, it is possible to provide a locking mandrel for removably fixing a well drilling device to a landing nipple in a flow conductor, and an operating device for operating and installing this mandrel.
This lock mandrel consists of a tubular body having a window on its outer periphery, a fixing catch that is supported in the window and moves radially between a fixed position and a released position, and a lock behind the catch. A key expander sleeve is included within the mandrel body and is movable to expand and secure the capture device outwardly. The operating device includes a hanging neck that supports the operating device in the well, and a fixing catch that removably engages with the lock mandrel body, and slides in and out of the hanging neck like a telescope barrel. a mounting sleeve collet that slides in and out of the trap support device like a telescope barrel to removably engage the lock mandrel; includes an operating prong assembly that slides in and out of the mounting sleeve collection device, like a telescope barrel, to engage the operating tube of the safety valve to hold the safety valve open while .
The prong device is coupled to the catch support device to provide a gripping force to the locking catch when the operating device is coupled to the locking mandrel and the safety valve during safety valve operation. In order to operate and secure the lock mandrel and safety valve, an operating device is secured to the lock mandrel body with a shear pin. The safety valve and lock mandrel are pushed into the lower landing nipple until the abutment ring of the lock mandrel engages the shoulder of the landing nipple. When the safety valve and lock mandrel are pushed down further, the shear pin between the operating device and the lock mandrel breaks. The operating device is then pulled up to unfold the lock mandrel catch. The control then applies pressure to the safety valve in the landing nipple so that the safety valve reduces the force applied to the prongs of the operating device to release the operating device. The operating device is removed from the lock mandrel only while the expander sleeve is in the up position and the control device applies pressure to the safety valve.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, the lock mandrel M has a tubular body formed by a fixing grip support sleeve 30 and a packing mandrel 31, an expander sleeve 33 for expanding the radially moving grips, and a packing device. Contains 34. The fixation catch 32 is movable within the window 35 of the catch support sleeve 30. The expander sleeve 33 moves behind the catch between a position in which the catch is secured (shown at the top of FIG. 1) and a position in which it is released (also shown at the bottom).

2 and 3, the interior of the locking catch support sleeve 30 is a round locking recess 40, which serves as an operating device for locking the locking mandrel and safety valve into the landing nipple. It has a fixing surface 41a at the upper end for receiving the upper hanging tool. A plurality of holes 41b for shear pins for holding the lock mandrel on the operating device are formed at intervals around the periphery of the catcher support sleeve 30. Windows 35 are spaced around the sleeve 30, and each window 35 is shaped and dimensioned to receive and hold one fixation catch 32. A sleeve is provided which allows the catch 32 to be moved between an inwardly disengaged position and an outwardly extended and secured position. The hole in the sleeve 30 is shaped to gradually widen at the window 35 to accommodate an expander sleeve 33 that expands the trap. The range in which this expander sleeve 33 can move upward is limited by a stop shoulder 4 in the hole of the sleeve 30.
2, this shoulder portion 42 is tapered.
As is clear from FIGS. 2 and 3, each window 35 has a vertically elongated recess 43 on the inside that supports the trap, and this recess 43 receives a supporting flange along the side edge of the trap 32. and insert the catcher into the sleeve 30.
window 35. The lower end of the sleeve 30 is provided with a screw 44 which connects the sleeve to the upper end of the packing mandrel 31. sleeve 3
An abutment-shaped ring 45 on the outside of the lower end of the lock mandrel M limits the range in which the lock mandrel M can descend.

The sleeve 33 for expanding the fixation catch is, as shown in FIG. 1, a tubular member having an upper guide portion and a lower guide portion or support ends 50, 51. The upper end 50 of this sleeve 33 slides above the stop shoulder 42 inside the hole of the catcher support sleeve 30, while the lower guide portion 51 of this sleeve 30 slides on the inside of the hole of the catcher support sleeve 30, while the lower guide portion 51 of this sleeve 30 Slide inside the hole. The hole in the catch-spreading sleeve 33 gradually widens at its lower end, and the tapered operating shoulder 52 engages the handle of the control device to raise the catch-spreading sleeve upward.
Move the grips outward to secure this. The outer diameter of the sleeve 33 that expands this catcher also gradually increases to a central upper portion 53, and further thickens to a central lower portion 54. Tapered cam surface 5
5 is provided in the central upper part 53 of the sleeve which unfolds the grip. A tapered camming surface 60 is provided between the upper central portion 53 and the lower central portion 54 of the sleeve 33. Portion 5 of the sleeve 33 that expands the catch
There is an annular hook receiving recess 61 on the outside of 3.
A sleeve for expanding the catcher is hooked onto this and held in an upper fixing position for fixing the catcher.

Each of the traps 32 is an arcuate member that fits within a window 35 of the sleeve 30, as shown in FIGS. 4-7, and whose inner and outer contours engage the sleeve 33 that expands the trap. It has a shape that allows the catcher 32 to be spread out and fixed. The side edge of this catcher has an integral support flange 62;
This flange 62 aligns with the support groove 43 along the window 35 of the sleeve 35 so that the catcher 3 within this window
2 in the extended position as shown in FIG.
On the outside of the catcher 32 there is a protruding surface 63, which is shaped to align with the fixing recess of the Landelung nipple and fix the lock mandrel M. The inside of the catcher 32 has an upper inner surface 64 and a lower inner surface 65, as shown in detail in FIGS. 4 and 5.
It is a gently sloping surface identified by . The inner surface of the lower end portion of the lower inner surface 65 is a cam surface 70 . Between the upper inner surface 64 and lower inner surface 65 of each catch is a sloped cam surface 71. The upper inner surface 64 also has a lip-like hook or ridge-like protrusion 72 that engages with the hook receiving recess 61 of the sleeve 33 when the sleeve is in the upper fixed position in FIG. The sleeve is removably fixed in a fixed position above this, and in this position the catcher 32 is unfolded. Cam surfaces 70, 7 on the inner surface of the catcher 32
1 shows the catcher in conjunction with the cam surface of the sleeve 33 that expands the catcher when the supporting sleeve 33 is raised from the lower disengaged position in FIG. 1 to the upper fixed position. Move it to its fixed position. In addition, there is an annular flange-shaped catch 73 on the outside of the lower end 51 of the sleeve 33 so that the upper end of the sleeve 33 can be hung, while an annular flange-shaped catch 73 is provided on the inside of the hole in the packing mandrel. There is a shoulder 74. The flange-shaped hanger 73, which is in a fixed position on the sleeve 33, is attached to the sleeve 33.
The portion above the flange shaped catch 74 is moved into the hole of the packing mandrel to assist in holding it in the upper fixed position.

In FIGS. 8A and 8B, the operating device R has a hanging neck part 80, which is a main feature of the present invention, and this hanging neck part 80 is a rope wrapping part for connecting the wire rope of the lifting device. The rope winding portion is tapered at the upper end, provided with a thread, and has an annular flange 82 on the outside.
The lower part of this hanging neck expands to form a skirt 83, and this skirt 83 has a hole 84.
The upper end part 85 of 4 is thin and has a screw thread on the inside. The outside of the upper mounting sleeve 90 is threaded along the upper end of the sleeve, and when this screw is inserted into the threaded hole 85 of the hanging neck, the sleeve 90 is held. The skirt 83 of the hanging neck portion and the upper end of the sleeve 90 are arranged in a three-dimensional concentric circle. This sleeve 90 has a pair of vertical slots 91.
There are slots 91 drilled along opposite sides of the sleeve. The lower end of the sleeve 90 has an inverted hole 92, and the inverted hole 92 has a shear pin hole 93 and a mounting screw hole 94.
The sleeve 90 has an annular recess 95 in its outer portion above the mounting screw hole 94 for removing the hook. The hanger support sleeve 100 slides on the lower end of the sleeve 90 like the lens barrel of a telescope.
It enters and exits this skirt 83 from between 0 and skirt 83. Windows 101 shaped to receive and support hangers 102 are provided at intervals around the sleeve 100. As shown in FIG.
Each window 101 has opposed vertically elongated hanger support lips or flanges 103, which flange 10
3 identifies a vertical recess 104 along the side edge of each window. As shown in FIGS. 13 to 16, each hanger 102 has an arc-shaped member that has an outer surface 10.
5 and an inner surface 110. This outer surface has a fixing protrusion 111, and the upper cam surface 1 of this protrusion 111
13 and the lower cam surface 114 is a recess 112 for receiving a sock-type garter spring. The fixing head of this hanger 102 is a protrusion 111 on the outside thereof.
The inner protrusion 11 is located between the cam surfaces 120 and 121 which are inclined on the inner side of the head.
5. As shown in FIG.
Inside each vertical side edge of the window is a recess (12th
There is a support flange 122 that aligns with the hanger 102 (FIG.) and each longitudinal edge of the hanger 102 extends through the window of the hanger support sleeve 100 to support the hanger within the window as the hanger moves in and out. The support flange 103 is engaged with the support flange 103 along the side edge of the support flange 103 . The hanger 102 is held in alignment within the window by a garter spring 123 that connects the hanger to the sleeve 102.
Arrange them in a perfect circle. The garter spring 123 passes through a recess 112 on the outside of the hanging portion of the hanger, and an annular recess 124 split into the outer surface of the sleeve 100 intersecting the lower end of the window 101 between the hangers.
pass through. This spring binds the hanger inside the window, but
The head end of the hanger is made to be able to move radially between a position where the head end forms the hanger's hook part spreads and hangs, and a position where it pulls in and comes off. The hanger 102 moves vertically with the sleeve 100 between a tensioned and retracted position. When the hanger head lines up with the unhook recess 95 of the sleeve 90, the garter spring 123 pulls the hanger head inwardly until it disengages.

In the diagram connecting FIG. 8A and FIG. 8B,
The upper end of the lower fixing sleeve 130 slides into and out of the oppositely oriented hole 92 of the upper fixing sleeve 90 like a telescope barrel. A braid screw 131 passes through the lower end of the sleeve 90 to hold the lower locking sleeve to the upper locking sleeve. Around the lower portion of the lower securing sleeve are a plurality of spaced downwardly extending elongated collet fingers 132, each collet finger 132 having a latch head 133. Each latch head of the collect finger has an upper cam surface 134 comprising an outwardly sloping tapered surface;
This camming surface 134 moves the locking gripper into the push-out sleeve 54 and then cams the latch head 133 inwardly to a position where it is released. As is clear from FIGS. 8A and 8B, the upper end of the collect finger 132 is joined to the main body of the sleeve 130, and the fingers of the collect finger 132, including the latch head 133, are both inside and outside. Jump out freely, hang onto the Rock Mandrel M, and operate it. The tubular core 135 passes through the lower fixing sleeve 130 and slides into and out of the upper fixing sleeve 90 like a telescope barrel. There is an annular hook receiving recess 136 on the outside of this core, and this recess 136 can move inward to a position where the hook head 133 of the collect finger 132 is disengaged when it is aligned with the recess 136. Do it like this. When this latch head does not line up with the recess 136 and thus lies along the larger diameter portion of the core above this recess, the outer surface of the core is aligned with the latch head 1.
33 to the outside in the operating position. The upper ends of the hanger head support sleeve 100 and the core 135 are connected to pins 141.
The pins 141 pass through opposite sides of the sleeve 100, the vertical slots 91 of the upper locking sleeve 90, and the opposite sides of the core 135. The pin 141 secures the hanger support sleeve 100 to the core so that the sleeve 100 and the core are tightly coupled and move as one unit. Similarly, the hanging neck and upper locking sleeve 90 are combined and move as a unit relative to the hanger support sleeve 100 and core 135. When the suspension neck is moved up and down, the upper fixing sleeve 90 is moved up and down relative to the hanger support sleeve 100 and core 135 accordingly. Movement of the hanging neck 80 causes the upper fixing sleeve 90 to move relative to the hanger support sleeve 100, which retains the upper hanger 102 and thus allows the recess 9 to release this hanger.
5 is moved relative to this hanger 102. Similarly, when the hanging neck moves, the collect finger 132 moves, and this collect finger 132 moves the sleeve 1.
Since it is controlled by 30, collect finger head 1
33 moves along the core 135 against the disengagement recess 136 in the head of this collect finger. The upper hook head 111 and the lower hook head 133 of the collect finger 132 connect the operating device R to the lock mandrel M, and operate the lock mandrel M.
The collection fingers of the upper locking sleeve, the lower locking sleeve, the upper catch, and the lower locking sleeve act to release the operating device from the locking mandrel upon change of relative position.

The lock mandrel M and operating device R are useful for operating and securing the tubular safety valve of a standard remote controlled cable well drilling system in a butt-type landing nipple. A typical safety valve operating a lock mandrel is the Otis type DK tubular safety valve listed on page 3998 of the 1974-75 edition of the Oilfield Equipment and Maintenance Catalog published by World Oil Co., Hyuston, Texas. and,
This nipple is for the Otis RQL type butt type safety valve, which is listed on page 4004 of this catalog. When using this Otis DK type safety valve, replace the landing mandrel based on the present invention with the locking mandrel listed on page 3998 of this catalog.

In the preparation stage for using the locking mandrel M and the operating device R of the present invention, as shown in FIG.
The lock mandrel is fixed to the safety valve S by screwing the threaded part at the lower end of the safety valve housing 150 into the threaded part at the upper end of the housing 150 of the safety valve. This safety valve operating fluid device (not shown) is connected to a suitable control operating pressure supply device, and this pressure supply device applies pressure to the safety valve with a pump until the safety valve is in the open position.
In the open position of the safety valve, the operating pipe 151 of the safety valve is at the lower end position as shown in FIG. 17B. When connected to a piston and a spring (not shown) corresponding to the working fluid of the operating pipe 151, the safety valve can be remotely operated from the ground after being installed. When the well is being dug down, the safety valve is held open by operating pressure applied from the ground, and when the operating pressure is removed, a spring closes the safety valve.

When the safety valve is opened, the operating device is extended to its maximum length by sliding the hanging neck 80 towards the sleeve 100. The operating device is then inserted into the associated lock mandrel M and the safety valve. When the operating device is inserted, the collect finger 132 is inserted into the sleeve 33 so that its finger-like hook passes over the internal cam surface 52 and into the widened hole in the sleeve 33 below this cam surface 52. Move along the lock mandrel until the head 133 of the hanger springs outward. Hang 1
The head 111 of the 02 engages the support sleeve 30 and moves within the portion 40 of the sleeve below the tapered shoulder 41 of the bore. Core 135 passes through the lock mandrel and enters the upper end of the safety valve. The pressure of the actuating fluid which had opened the safety valve is then removed, so that the spring engaged in the actuating tube 151 of the safety valve pushes this actuating tube up against the tapered surface 138 of the lower edge of the prong 137 held at the lower end of the core. The upward force of the safety valve spring pushing up this core exerts an upward force on the pin 141, which pushes the hanger support sleeve 100 upward. The upward force of this sleeve 100 pushes the upper hanger 102 upwards into the recess 9 from which this hanger is removed.
5, so that the head 111 of the hook 102 presses along the outer surface of the sleeve 90 above the sleeve 3.
0 inner fixing surface 41a and hanger support sleeve 10
0 and the tapered surface 101a of the lower edge of the window 101, and the annular portion formed by the sleeve 90 and the hole 40 of the sleeve 30 surrounding the sleeve 90. The upward force of the sleeve 100 is applied from the window surface 101a to the inner end surface 121 of the hanger head 111 pushing the hanger upwardly and outwardly so that the upper outer end surface 113 of the hanger head is pushed towards the internal annular tapered surface 41 of the sleeve 30 which secures the lock mandrel to the sleeve 30. At the lower end of the operating device, the collect finger head 133 is held in its normal position by the outer surface of the core below the core recess 136, so that the surface 13 of the collect finger head 133
4 can engage the cam surface 52 in the sleeve 33 which spreads the grip of the lock mandrel. The operating device is operated by lightly pulling the suspension neck 80 upward from the lock mandrel until the shear pin hole 41b of the sleeve 30 of the lock mandrel and the shear pin hole 93 of the sleeve 90 of the operating device are lined up. The shear pin is then inserted through the shear pin hole 41b of the lock mandrel 41 and into the hole 93 of the operating device to pin the lock mandrel to the operating device. Figures 17A and 17B show a safety valve and a locking mandrel coupled to an operating device for operating and securing the safety valve. As can be seen in this figure, the catch 102 on the operating device engages the sleeve 30 of the lock mandrel M, and the head 133 of the collect finger engages the sleeve 33 that widens the catch of the lock mandrel. The sleeve 33 for expanding the catch is in the lower end position;
In this position, the locking mandrel's fixing catch will come off inward. This completes the conditions for lowering the lock mandrel and safety valve into the well and securing them in the landing nipple.

On the hanging neck part 80 of the operating device R, this operating device,
The locking mandrel and safety valve are connected to the hoist line for lowering the safety valve through the flow conductor into the well and into the landing nipple 160 as shown in FIG. 18B. This landing nipple has an annular fixing recess 161 and an abutment-shaped stop shoulder 162 on the inside. The safety valve and lock mandrel are inserted into the jar of the sling until the abutment ring 45 integrated into the lower end of the sleeve 30 of the lock mandrel engages the abutment shoulder 62 of the landing nipple. and is driven downward. Packing mandrel 34 descends below shoulder 162 along sealing surface 163 of the landing nipple. Further, the downward force applied by the jar to the hanging neck 80 causes the hanging neck to engage the lower edge of the skirt 83 of the hanging neck with the upper edge of the mandrel sleeve 30, thereby coupling the operating device to the mandrel. This pendant neck is driven downward until it shears the pin 155 that is in place. Figures 18A and 18
Figure B shows the safety valve and lock mandrel in contact with the abutment shoulder of the landing nipple and the actuator operated to shear the pin 155 connecting the actuator to the sleeve 30 of the lock mandrel. This operating device is still attached to the upper hook 10.
2 and is connected to the lock mandrel by a collect finger 132. The safety valve spring continues to exert an upward force on prongs 137 and core 135, and this force is transmitted through pin 141 to upper securing sleeve 100, which causes window 10 of this sleeve to
1a serves as a force that pushes the hanger 102 outward and upward, and by this force, the hanger 102 engages with the shoulder portion 41 of the lock mandrel 30 and firmly fixes the lock mandrel. Apply upward force to the suspension rope of the lifting device (not shown). If the force with which the sling is wound is greater than the weight of the equipment hanging on the sling, this indicates that the safety valve S is in the correct position within the landing nipple. When the hanging neck part 80 swings upward, the upper fixing sleeve 90 and the lower fixing sleeve 130 are pulled upward, and the core 135
and the hanger support sleeve 100 which pushes up the hanger 102 to provide a locking action. As the collect finger 132 is raised, the upper edge surface 134 of the collect finger head 133 spreads out the tapered shoulder 52 of the sleeve 33.
This sleeve 33 is engaged with the inside of the catcher 32.
lift up. As the sleeve 33 moves, the cam surfaces 55, 60 of the sleeve engage the cam surfaces 70, 71 on the inside of the catcher, and the cam action causes the catcher to move as shown in FIGS. 19A, 19B, and 19B. As shown in Figure 1, move it radially all the way to the outside. This catcher moves outward until its outer protrusion engages the landing nipple fixing recess 161, thereby fixing the lock mandrel M together with the safety valve S in the landing nipple against vertical movement. The sleeve 33 that expands the catch of the locking mandrel is such that the cam surface 55 of this sleeve 33 is connected to the stop shoulder 4 on the inside of the sleeve 30 of this mandrel M.
2 to the upper end position where it engages. At the upper end position of the sleeve 33 inside this catcher 32, the catcher 32 is firmly held in the radially expanded position shown in FIGS. 19A, 19B, and 1. An upward force is then applied to the sling of the lifting device, i.e. the sling is wound around, and an actuating pressure is applied to the control device, which actuating pressure is applied to the safety valve S.
The pressure of this control device is controlled by the operating pipe 151 inside the safety valve.
The spring of the safety valve against the piston of the safety valve moves the safety valve operating pipe 151 slightly downward and continues to push the core of the operating device that holds the operating device on the lock mandrel with the upper hook 102. relieves the upward force of Then, when the suspension rope of the lifting device is wound, the hanging neck portion 80 is pulled up, and this hanging neck portion 80 is attached to the upper fixing sleeve 90 and the lower fixing sleeve 90, leaving the hanger support sleeve 100 and core 135 of the operating device. Pull up the sleeve 130. By pulling up the sleeves 90 and 130, the recess 95 from which the sleeve 90 is removed is located at the head 1 of the upper hanger.
11 and the head 133 of the collect finger is pulled up and entered into the recess 136 of the core by the action of the cam. When the recess 95 for removing the sleeve is aligned with the upper hook 111,
The garter spring 123 tightens the hanger 102 inwardly and the hanger head 1 engages the shoulder 41 at the upper end of the hole 40 in the sleeve 30 of the lock mandrel.
11 goes inside and the operating device is removed from the lock mandrel. When the operating device is pulled upwards, the cam 52 on the shoulder of the lock mandrel sleeve 33 acts to move the cam 134 on the edge of the collect finger head 133 upward. This collect finger head 133 is tightened inwardly and the core recess 1
36 and out of the sleeve which unfolds the lock mandrel catch. Rock Mandrel M
The packing mandrel 34 is attached to the butt-shaped shoulder 162.
A lower frictional engagement with the sealing surface of the landing nipple prevents the locking mandrel from slipping out of the landing nipple when the mandrel is secured in the landing nipple by the operating device. If the locking mandrel does not disengage properly from the operating device, the mandrel and safety valve will be pulled back when the operating device is raised. For example, if the control pressure is not properly applied to the safety valve, the face 13 of the probe
Since the upward force applied to 8 is not relieved, the upper hook 102 is attached to the surface 41 of the lock mandrel sleeve.
I can't get away from it. Similarly, if the locking catch 32 does not extend into the locking recess 161 of the landing nipple, the sleeve 33 that spreads this catch cannot be pulled up, so that the head 133 of the collecting finger cannot be pulled up. cannot be pulled up along the core until it lines up with the recess 136 for removing this head 133, so that the operating device remains in the locking mandrel at the collet finger 132. In the unlikely event that an abnormal action occurs in which the operating device is pulled up from the landing nipple along with the locking mandrel and safety valve,
Forcibly lower the operating device, lock mandrel, and safety valve back into the landing nipple, repeat the operation to fix the lock mandrel in the landing nipple, and remove the operating device. After properly removing the operating device from the lock mandrel,
The lock mandrel is left in the landing nipple in such a way that it can be removed, and the safety valve is opened and closed using the control pressure of the control device operated from the ground according to the drilling procedure. Rock Mandrel M
Hatch receiving recess 6 of sleeve 33 for expanding the grip of
Since the flange 72 of the catcher 32 engages with the
In addition, since the protrusion 71 of the gripping tool is located above the circular gripping flange 74 inside the packing mandrel 31 of the locking mandrel and along the lower end of this sleeve, the sleeve 33 that widens the gripping tool of the locking mandrel M will not come off accidentally.

The device according to the invention consists of a locking mandrel M and an operating device R, which are fixed by being passed through a butt-shaped landing nipple with a downward force, and conversely by an upward force into a suitable position in the borehole of a well. To provide a well drilling device in which the lock mandrel M is fixed so as to be removable so as to hold the safety valve at a certain position. The lock mandrel is designed to prevent accidental dislodgement, inadvertent fixation, and other malfunctions while driving the lock mandrel into a proper position within the landing knit.

The Rock Mandrel M is a conventional Otis type that is published with diagrams in the 1974-75 edition of the above-mentioned "Integrated Catalog of Oil Field Equipment and Maintenance".
It can be removed from the landing nipple along with the safety device using GR and GS type lifting devices. Such a drop-saving device has a fork-like member coupled to the core of the device, and the fork-like member is attached to and removed from the sleeve by pressing down on the sleeve 33 that widens the catch of the lock mandrel. The operating pipe 15 of this safety valve is designed to keep the safety valve open while the lock mandrel and safety valve S are suspended.
1.

This device for preventing accidents with the operating device is capable of removing the lock mandrel trap 32 from the suspended operating device, the lock mandrel M, and the safety device and recovering it on the ground. The locking screw 131 can be sheared to remove the lower locking sleeve 130 from the upper locking sleeve 90. For example, if the pressure of the working fluid that controls the safety valve becomes abnormal after the lock mandrel is fixed, the fixing screw 131 will be severed by the lifting force applied to the hanging neck portion 80. This hanging neck is then driven downwards, this hanging neck pushes the upper fixing sleeve down towards the lower fixing sleeve and the catcher spreading sleeve 33, which spreads the catcher. 32 into the lower end position to move the catch inward.
After that, the hanging neck part 80 is pulled up, but the lower fixing sleeve 130 is already attached to the upper fixing sleeve 9.
Since it is removed from 0, collect finger 1
32 is not pulled up in the catch-spreading sleeve 33, so that the catch-spreading sleeve is not moved behind the catch 32, which is not moved when the lifting device, mandrel and safety valve are pulled. It's an outlier. This mandrel can therefore be pulled without resetting the capture.

[Brief explanation of drawings]

1 is a longitudinal sectional elevational view of the lock mandrel of the present invention, FIG. 2 is a longitudinal sectional view of the expander sleeve of the lock mandrel of FIG. 1, and FIG. 3 is a sectional view taken along line 3--3 of FIG. 2; Figure 4 is a vertical cross-sectional side view of the lock mandrel trap shown in Figure 1, and Figure 5 is the
6 is an elevational view showing the inside of the trap shown in FIG. 4, FIG. 7 is a bottom view of the trap shown in FIG. 6, and FIGS. 8A and 8B are the main 9 is a cross-sectional view taken along line 9--9 of FIG. 8B; FIG. 10 is an elevational view of the hanger support sleeve; FIG. 11 is a cross-sectional view of the sleeve of FIG. longitudinal section,
12 is a cross-sectional view taken along line 12-12 of FIG. 11; FIG. 13 is an elevational view of the upper hanger;
3, FIG. 15 is an elevational view of the inside of the hanger in FIG. 13, FIG. 16 is a bottom view of the hanger in FIG. 14, and FIGS. 17A and 17B are the book. FIGS. 18A and 18B are longitudinal sectional elevation views of the locking mandrel and operating device of the invention in a combined state, combined with the upper end of the safety valve (partial view) and the landing nipple (partial view), and lowered into the ground. FIGS. 19A and 19B are longitudinal sectional elevation views of the operating device and lock mandrel of the present invention in the landing nipple (partial view), showing the operating device, lock mandrel, and FIG. 3 is a longitudinal sectional elevational view of the safety valve. 30... Trap support sleeve, 31... Packing mandrel, 32... Capture tool, 33... Expander sleeve, 34... Packing device,
35...window, 80...hanging neck part, 90...upper fixing sleeve, 100...hanger support sleeve, 1
01...Hanging window, 102...Hanging, 130...
Lower fixing sleeve, 132...collection finger, M...lock mandrel, R...operating device.

Claims (1)

[Claims] 1. The lock mandrel includes a main body provided with a window on the side, a circular sealing device that surrounds the main body and seals between the main body and the sealing surface of the nipple for digging, and the mandrel. a support shoulder provided on said body for support in an abutment-shaped landing nipple; a fixation supplement radially movable within each window in the side of said body; an expander sleeve that is located inside the supplementary tool and moves vertically to expand and fix the supplementary tool outward and move the supplementary tool inward to release the fixation; and a device for coupling the mandrel main body to a well drilling device. an operating device having a hanging neck for coupling a lifting cable of a lifting device; an upper hook device coupled to the hanging neck for coupling the operating device to the mandrel body; and an operating device; a lower collect finger device for connecting to the expander sleeve of the lock mandrel, and a prong end connected to the head for engagement with the well drilling rig actuating member. a core for applying a force to the latching device to secure the latching device to the mandrel body; movable in a direction opposite to the direction in which the hanging neck is attached to the landing nipple in order to release the device; and includes the locking mandrel and the operating device; A well drilling device, characterized in that it is installed and fixed in the landing nipple along a wellbore of a well. 2. The mandrel body has an internal recess for engagement with the hanger, and the expander sleeve has an internal circular recess for engagement by the collet finger. The well drilling equipment according to item 1. 3. The locking mandrel and the operating device, in the expanded position of the fixing supplement, include a hanging device for hanging the expander sleeve so that it can also be removed. The well drilling device according to item 2. 4. In the lock mandrel and operating device, the hook device includes a hook receiving recess that surrounds the lip-like hook of the expander sleeve and the fixing supplement, and the lip-like hook engages with the hook receiving recess. 4. The well drilling apparatus according to claim 3, wherein the hanging device further includes a hanging flange surrounding the expander sleeve and a hanging flange inside the mandrel body. 5. In the locking mandrel and operating device, the supporting shoulder of the mandrel body is provided with a circular abutment-shaped ring between the fixing supplement and the sealing device. The well drilling equipment described in paragraph. 6. In the locking mandrel and operating device, each of the fixing supplements has an internal cam surface for expanding the fixing supplement, and the expander sleeve externally engages the cam surface of the fixing supplement. The well drilling device according to claim 5, characterized in that it has a cam surface. 7. The lower collet moves along the core, and the core has an external circular hook removal recess for detaching the collet from the expander sleeve of the lock mandrel, and the hook is removed. 7. The well drilling apparatus according to claim 6, further comprising a locking mandrel and an operating device such that the recess for removing the hook is aligned with the collet finger. 8. A locking mandrel with an upper mounting sleeve coupling between the head and the collect finger for movement of the collect finger along the core, and an operating device. The well drilling device according to paragraph 7. 9. Actuating the expander sleeve of the lock mandrel and removing the operating device from the lock mandrel by moving the hanging device and the core as an integral device relative to the pin-joined head; 8. The well drilling apparatus according to claim 7, characterized in that it includes a lock mandrel and an operating device. 10 the upper rig device includes a rig support sleeve pin-coupled to the core, the rig support sleeve being responsive to a force on the core from a well drilling rig coupled to the lock mandrel; Claim 7 further comprising a lock mandrel and operating device having a tapered cam surface that engages a cam surface of the latching device to force the lock mandrel into the lock mandrel body. The well drilling equipment described in paragraph. 11 a hanging neck for connecting the operating device to the lifting cable; an upper hanging device for connecting the operating device to the body of the lock mandrel; and a hanging neck for connecting the operating device to the body of the lock mandrel; a lower collet device supported by a neck; a force for holding the upper latch device secured to the lock mandrel body coupled to the upper latch device for engaging an operating member of the well drilling rig; a core having a prong end; moving the lower collet finger in response to movement of the hanging neck to remove the expander sleeve of the lock mandrel from the lock mandrel and remove the operating device; Claim 7, characterized in that an operating device with said core having means for securing and unsecuring the swinger sets and secures said locking mandrel in a landing nipple along the borehole of a well. The well drilling equipment described in paragraph. 12. The upper hanger support sleeve has a window disposed therein and a plurality of hangers that move radially within the window;
when moving the expander sleeve within the lock mandrel by expanding the fixation aid of the lock mandrel and moving the head to remove the operating device from the lock mandrel after the fixation supplement has been expanded; , a pin is provided between the hanger support sleeve and the core so as to hold the hanger support sleeve and the core as an integrated device, and the upper hanger support sleeve is attached to the upper hanger device. 8. The well drilling apparatus according to claim 7, wherein the hanging device is included in the operating device. 13. Claim 7, characterized in that the lower collection device is held on the hanging neck via a shear pin device so that the operating device and lock mandrel can be removed from the wellbore to avoid accidents. The well drilling equipment described in .