Rigid retrieving tool

Click the X to close this notice. RIDGID offers a wide variety of cutters and augers to clean everything from grease to root blockages.

Explore Emerson. Select a Country. Sectional Cable Tools. Drop Head Auger - For cleaning back to back mounted fixtures e. Funnel Auger - For use as second tool in line.

Breaks up remains of stoppage left by straight auger. Hook Auger - For heavy and dense root stoppages in pipes that require hooking and breaking up. Retrieving Auger - For searching for cable which is broken or lost in line. Spade Cutter - For following up after augers have been used and to open up floor drains. Four Blade Saw Tooth Cutter - For blockages caused by hardened, glazed material such as chemical deposits.

Grease Cutter - For lines which have become badly greased with detergents and have to be opened. Spiral Saw Tooth Cutter - For clearing any stoppage, roots, rags, sticks, etc. Saw Tooth Cutter - For cleaning lines blocked heavily with roots. Unique design permits cutter to be removed from damaged pipe without locking. Spiral Bar Cutter - For main sewers blocked by roots, leaf debris, sticks, sawdust, cloth, and sacking.

The second portion of the inner sleeve mandrel is threadedly connected to the inner sleeve mandrel at thread connection Referring to Figure 3, the second portion of the inner sleeve mandrel has defined thereon a J-slot member of pattern As previously recited, the lug at is received within J-slot member Referring now to Figure. A first shoulder is defined on the inner sleeve mandrel wherein the previously described locking dogs rest. A second frusto-conical shoulder, , is formed on the upper neck , this second frusto-conical shoulder having an obtuse angle to the base of the inner sleeve mandrel A final shoulder , which represents one of the inner mandrel , abuts the power mandrel and prevents upper longitudinal movement.

The inner sleeve mandrel , the upper portion and lower portions , the J-slot lugs , the J-slot member , the recess necks and associated shoulders comprise the means for latching the retrieving tool to the downhole device.

The overshot means is seen generally at The overshot consists of three primary members outer sleeve , ratchet means , and center spring housing Referring to Figure 6C, the outer sleeve member has defined thereon ratchet teeth at The ratchet teeth will engage reciprocal ratchet teeth located at the top end of the bottom hole device, generally a bridge plug, as shown in Figure 1.

Referring again to Figure 6C, the inner diameter of the outer sleeve defines a shoulder at The outer sleeve slidably rests about the inner sleeve mandrel Note that Figure 6C does not show the valve of the downhole device typically, a bridge plug , seen in Figure 1 and depicted generally at Referring to the Figure 6B, the outer sleeve is rigidly-connected to a center spring housing member In the preferred embodiment, the outer sleeve is rigidly fixed to the center spring housing by means of a hex lock screw The center spring housing contains a lower member containing an aperture for entry of the hex hock screw The thickness of the housing generally increases to maximum thickness at the center, shown at Two sealing means, which are generally O-rings, are placed at either end of the outer peripheral of the center spring housing and are shown at and The upper sleeve of the overshot means is rigidly secure to the center spring housing In the preferred embodiment, the upper sleeve is attached to the center spring housing by means of a screw lock with an adjacent hex sock screw and , respectively.

At the point of connection of the center spring housing and upper sleeve , the center spring housing rests on the power mandrel at The chamber defined by the annulus formed between the center housing and inner mandrel contains a helical spring The spring abuts the shoulder of the member of the center housing, and the lower shoulder of the lower power mandrel In the preferred embodiment, a helical type spring will be used.

Referring to Figure 6A, an upper neck is defined on the top of the upper sleeve The upper sleeve contains a ledge which rests on the lower power mandrel and is slidably disposed so that the lower power mandrel can move relative to upper sleeve A sealing means, disposed in grooves of the upper sleeve leg, generally consists of an O-ring As mentioned previously, the adapter is threadedly connected to a release sub The purpose of the release sub is to allow a point in the workstring wherein if any of the downhole devices become lodged in the wellbore, and it is necessary to pull out the hole, the point where the workstring will be severed will be at the release sub This prevents the entire workstring from becoming lodged, or stuck, in the wellbore.

Therefore, the outer sleeve member , containing ratchet teeth , center spring housing rigidly connected to the outer sleeve members , an upper sleeve housing , and a spring contained in the spring chamber defined therein, comprise the overshot means.

Referring to Figure 7, in order to retrieve the downhole device utilizing the present invention, the apparatus is run into the wellbore on either coiled tubing, wireline or electric line.

As means of connection from the workstring utilized coiled tubing, wireline or electric line to the apparatus of the present invention, there is utilized a jar , such as a Big John jar, commonly used and appreciated by those skilled in the art.

Next, threadedly connected thereto, will be a swivel , which will allow a fixed point at one end and a rotational point at its opposite end. In other words, the swivel allows everything beneath it to rotate, relative to the workstring employed.

Again, the swivel is common in the art and known to those of ordinary skill in that art. A third member, commonly referred to as an emergency release shear sub , is connected to the swivel The release sub is pinned at its upper end to the swivel and then threadedly connected to the power mandrel The shear release sub is placed in the workstring in case the workstring below the shear release sub becomes stuck, allowing for the shear sub to act as a weak point to be separated and the remainder of the workstring to be brought out of the hole.

Thus, the apparatus, with a workstring as previously described, is run in the hole to the desired depth where the downhole device has been set. The ratchet teeth on the outer sleeve will fit over the top of the valve and slide over the top of the downhole device The ratchet teeth will engage the reciprocal ratchet teeth which are located on the top of the downhole device.

Once engaged, the ratchet teeth means will prevent counter clockwise rotation of the over shot means Simultaneously with the engagement of the ratchet teeth with reciprocal ratchet teeth , the shoulder on the inner sleeve mandrel, lower portion , will act against the valve ring sleeve , thereby opening the valve. It should be remembered that the outer sleeve housing mandrel slides over the valve and engages the ratchet teeth means The ratchet teeth means will abut shoulder of the downhole device.

Downward movement of the inner sleeve mandrel will be biased, however, because of the spring , located in the spring chamber As the shoulder at opens the valve of the downhole device, the lug at of the inner sleeve mandrel enters the J-slot member located on the valve means Continued downward force on the power mandrel transmits the downward force through the inner sleeve mandrel As ratchet teeth means and reciprocal ratchet teeth abut, downward movement of outer sleeve of the overshot means will stop relative to the downhole device; however, the inner sleeve mandrel can continue downward longitudinal travel, moving relative to the overshot means As shown in figure 6C, the spring is in compression.

Normally, the spring is expanded to the full extent of the spring chamber , such that the shoulder of the spring housing abuts shoulder of the inner sleeve mandrel.

Next, the workstring is picked up i. As upward force is applied the locks travel upward relative to the inner sleeve mandrel until lock encounters chamfered shoulder At this point, lock will engage shoulder which will import the upward force exerted on the power mandrel to also exert upward force on the inner sleeve mandrel i. As the power mandrel and inner sleeve mandrel continue their upward movement, the inner sleeve mandrel lug will also move up in the J-slot member of the downhole device Referring to Figure 6A, the power mandrel lug is at a lower position in the J-slot member With reference to the inner sleeve mandrel, once the lug travels to the top portion of the J-slot member, the lug will act against J-slot member and the locking dogs will slip out of the recessed shoulder Referring to Figure 3, once locking dogs has slipped out of recess neck , the power mandrel lug travels up to point As upward longitudinal force is continued to be applied to power mandrel, the lug will follow J-slot member contour.

Thus, lug will move to the top of J-slot member This traversal causes the inner sleeve mandrel to rotate. Once at the top, the lug will act against the J-slot member at The operator of the workstring can recognize the position of the lug relative to the J-slot member due to the increase in the weight of the workstring.

Next, weight can be slacked off and lug ll8 moves down relative to the J-slot member. Lug ll8 will contact shoulder in its downward movement. As the workstring is slacked off longitudinal movement downward lug ll8 will travel to This traversal causes the inner sleeve mandrel to again rotate.

Thus, as the inner sleeve mandrel l28 was rotating due to the longitudinal movement of the power mandrel l00, the lug at l32 on the inner sleeve mandrel was also rotating. The rotation of the lug l32 engaged the J-slot member contained in the valve means of the downhole device.

An upward force, applied to the power mandrel l00 will now cause lug l32 to act against the J-slot member in the valve, and increased longitudinal movement will thereby effect a release of a downhole device Express Bridge Plug. Figure 5 is provided to show the prior art means to retrieve the typical downhole device bridge plug with a rigid workstring, as shown in Figures 2A-2D.

For a detailed disclosure, see the aforementioned U. Apparatus according to claim 1, wherein said power mandrel l00 comprises a lower power mandrel l08 having a portion defining a plurality of grooves ll0 and a second single slotted indentation ll6 defined on said lower power mandrel l Apparatus according to claim 2, further comprising a plurality of locking dogs ll2 , said locking dogs being received within said plurality of grooves ll0 ; and a first J-slot lug ll8 positioned within the single slotted indentation ll6.

Apparatus according to claim 1,2 or 3, wherein said means for latching comprises an inner sleeve mandrel l28 having a first and second end, said inner sleeve mandrel being slidably disposed within said power mandrel l00 , said inner sleeve mandrel including: a first shoulder l30 defined at the first end, a second J-slot lug l32 disposed on said inner sleeve mandrel, a second shoulder l36 disposed on the inside peripheral of said inner sleeve mandrel, and a recessed neck l44 defined at the second end of said inner sleeve mandrel; the inner sleeve mandrel being rotatable relative to said power mandrel.

USA en. EPA3 en. AUB2 en. CAA1 en. NOL en. USB2 en. USB1 en. Method and apparatus for wellbore separation of hydrocarbons from contaminants with reusable membrane units containing retrievable membrane elements. Latching system for maintaining position of component within a downhole drill string section.