DE3135931A1 - Device for drilling oil and natural gas wells and for delivering oil and natural gas from them - Google Patents

Description

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ν. f UNfJi ST IVf-St. SCHÜBEL-HOPF EIE3BINGHAUS FINCK

MARIAHILFPl ATZ 2 & 3. MÖNCHEN QO

POST ADDRESS BOX 96 0160,0-8000 MUNICH 95

ALSlO PROFESSIUNAL Ht-PHILSEN TATIVES

nefcoHF the kuhüf'ean patent off-ice

■ KAHL LUDWIG SCHIFF (196-t -1078)

DIPL. CHEM. OR. ALEXANDER V. FÜNER DIPU INQ. PETER STREHL DIPL-CHEM. OR. URSULA. SCHOBEL-HOPF

dipl. in O. dieter ebbinshaus dr. ing. dieter finck

phone (ο8θ) 4sso64

telex 5-23 565 auro d

telesramme auromarcpat Munich

September 10, 1981 DEA. - 22 263

Device for drilling oil and natural gas wells and for förde tion from these

The invention relates to a device for drilling

Oil and gas wells and for extraction from them that : as a connecting piece or connecting piece from

j Drilling, lining and production pipe columns and dredging

ί as well as pipe hangers or other production tools

can be used.

In oil and gas mining, drilling and means known to the conveyance from probes for detaching and connecting the drilling and conveying devices, such as screw connections with a large thread pitch, usually with a multi-start thread and stop collar, or couplings with bayonet lock, characteristic of all known equipment is that due to the Construction design and the machine construction elements used can only be operated by screwing or screwing. Rotating or rotating and an axial movement for connecting or disconnecting can be done. This results in Functional uncertainties. Particular problems arise from contamination, in a corrosive environment and with relatively high temperatures, where loosening or separating requires even greater torques.

A connection in the shaft is generally only possible with a bayonet lock, although the equipped with bayonet lock equipment work with a great uncertainty and due to their low Strength, in particular, cannot bear compound and high loads.

To improve the cutting process in the well, left-hand threads with a high pitch and variable Threaded profile used together with a right-handed tubular column during installation. As a consequence, that when loosening in the well the built-in right-hand tube column is not at different, as a rule at the same time several places, is separated at once. However, this does not completely solve the problem, since Due to the thread design, the tube column cannot be separated from the device. Another disadvantage the installation of a left-hand piece of equipment in a system with a right-hand thread appears. this creates numerous constraints in technology and increases the possibility of accidents. Here a full connection in the well is impossible.

The aforementioned problems are exacerbated in the known equipment by the fact that im In the case of great depths to connect and disconnect or twist the neutral point from the surface the point of unscrewing cannot be adjusted. Furthermore, the transmission of the torque is from the surface of the earth down through the long in the As a rule, thin and elastic tubular columns reaching several meters are also limited.

The above-described functional uncertainties of the known constructions limit the deep drilling and especially well training opportunities. The frequent mistakes and damages lead to expensive technical ones Accidents. They ultimately increase the risk of deep

drilling and well formation, i.e. the deep drilling and production costs. As equipment for tube columns the known equipment cannot be used at all.

The object of the invention is to develop a universal device for separating and connecting deep drilling tools, Thorns and production equipment as well as drilling, conveying and casing columns in the well that free of all the design flaws causing the functional uncertainty of the known equipment and is built in such a way that the connection and disconnection of the specified well device is only possible by one in the Axial line of coupling and disengaging, i.e. in a vertical direction, movement taking place in a controlled manner can be. The connection and disconnection or the coupling and uncoupling should be done with components be attainable, whose operating energy requirement even under contaminated and corrosive conditions as well at high temperatures the smallest possible, whereby the securing of the seal between the high-pressure chambers should be easily achieved.

This task is solved by a connection piece intended for deep drilling probes, which is connected to an external Connection piece provided with a round groove, a connection piece provided with an inner round groove, this releasably connecting Lower and upper movable locks in a suitable number, a double lock housing, a control sleeve and unidirectional ones arranged in their seats Has locking device.

In the upper, larger diameter cylindrical outer surface of the connecting piece with an outer Round groove is a round groove with an appropriate width, depth and pitch for connecting or engaging the upper in one direction acting arrester provided. In its lower, smaller diameter

cylindrical surface is with appropriate depth and The width of the upper round groove used for plaguing and the lower round groove used for loosening are provided facing shoulders are conical or curved.

In the jacket of the bore of the inner round groove connection piece a round fixing groove is provided, the upper shoulder of which is conical or arcuate.

In the double locking housing, a row is formed at the bottom and at the top along a circle, in a radial one Directional and profiled lower and upper locking windows in an appropriate number for recording the lower and upper movable locking elements are provided. In the outer cylindrical surface is with zv / corner-useful width and depth a counter-holder round groove provided for the lower one-way locking connection.

For regulating the connection or disconnection or the coupling or decoupling of the device elements the control sleeve is used. In the jacket of their bore are the lower and upper control loop grooves in an appropriate arrangement and the seats are arranged to accommodate the lower and upper unidirectional locking elements. The upper shoulder of the lower control circuit groove is conical or arcuate.

The connection and disconnection of the device according to the invention can be done in the well after the removal, repeated assembly and installation operations can be repeated in unlimited numbers. Due to the repeated assembly over days opportunities to replace worn seals and possibly components.

The device according to the invention can be actuated by exclusively axial movement and meets the requirements the objectives, so that they are of great advantage for separating and connecting packers, sealing plugs,

Casing hangers, rescue and catching tools, production and casing propulsion columns can be deployed at depth.

Because of the continuously deepening bores and wells, it is of "particularly great importance that with the help of the Separating and connecting device for pipe hangers, the section-wise piping of the well with large Securing can be realized with the first tube column built in with the bore of the section or suspended from the bottom of the previous tube column and cemented and then, after separating the device, the drill string can be removed.

When the upper main unit of the device is attached to the lower end of the following upper tubular column they are connected to the casing hanger or to the preceding casing traveling column. The tube column can hit this method in terms of tensile strength be designed for a much lower load, which means a significant saving in high-strength Casing and ultimately leads to lower well construction costs. The invention is of great importance especially in deep drilling, where in addition to the costs and better utilization of the drilling equipment, the use of the device can therefore also be rated as an advantage, since the upper section of the casing driving columns is exposed to wear through the drill pipe during the long period of drilling and is therefore frequent Must be subjected to controls. The best way to do this is to use the top of the tubular column To loosen and remove casing hangers, after which the inspection or replacement of the damaged ones for days Linings can be made.

When installing the device according to the invention in the non-cemented casing column section above the shoe or the end of the previous casing column,

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it can also be used in the case of small and medium bores Depth can be made usable. In the event of damage to the upper casing driving column - what a great deal occurs frequently - can be replaced by replacing the damaged one Lining pipe and the aforementioned repair can be made by reconnecting. With the same Technology can also solve the problem that, in the event of an unexpectedly high reservoir pressure, the upper section The tube column is exchanged for a column with greater strength or with lower strength Pressing the upper tube column regained and production with the previous tube column can be carried out, e.g. deep pumping.

In contrast to recovery with unsalted boreholes, it can be done with shooting or with erosion or to other common recovery methods quickly, easily, risk-free and without damage The upper section of the tube column can be recovered from the probe construction.

An advantage of the invention in this sense is that quite a lot of casing can be saved, which is of particular importance, as it avoids the unfounded use of high-strength casing pipes can be.

The invention is explained in more detail, for example, with the aid of the drawing. Show it:

Fig. 1 shows the device in the form of a connector before connecting or coupling together,

Fig. 2 shows the connector in connected or coupled together Condition and

Fig. 3 shows the connector in the separated or uncoupled State.

In the connector shown in FIG. 1, the 35

Outer groove connection 1 the body of the device, which with its upper connection thread 1 a beifil installation in the Well to the lower thread of the drilling, conveying or Lining column can be screwed ._ The Outer circular groove connection 1 is designed with a bore at the top and a stepped cylinder surface on the outside so that that in its larger diameter upper jacket with an appropriate width, Depth and pitch of the moving toothing 1 c for engagement with the upper acting in one direction Locking piece 6 comes while in its smaller diameter lower cylindrical Area with appropriate depth and width, the upper, serving for locking circular groove 1 a below with a conical Shoulder is provided. On the same outer surface is at a convenient distance from the upper one Feststellkreisnut the lower circular groove serving for loosening 1 b with the corresponding width and depth and above with conical shoulder provided. In the outer surface of the outer circle groove connection piece 1 is also still the rotating groove 1 d arranged in the axial direction is provided for partially receiving a pivot pin 8 and so suitable for the transmission of a torque.

The drilling or conveying device can be connected to the lower connection thread of the inner circular groove connection piece 9 of the equipment or the fishing pin can be screwed on for installation in the well. In the jacket of the bore of the inner circular groove connection piece 9 is of useful breadth and depth the inner circular groove worked out, the upper shoulder of which is conical is executed. At the upper end of the same component are the lower ones in an appropriate form and number Rotary claws 9 b formed.

On part of the outer surface of the external groove fitting 1 or in the bore of the inner circular groove connection piece 9 is on the lower rotary claw shoulders

supported the double locking housing 2 arranged in the bottom and top along a circle each Row forming radially directed upper Peststellfenster 2 a and lower parking window 2 b in appropriate Number for receiving the upper movable locking pieces 4 and the lower movable locking pieces 5 are provided with an appropriate width, depth and pitch in the outer cylindrical surface Circular groove for connecting or engaging the lower locking piece 7 acting in one direction is provided is.

On a part of the outer surface of the outer circular groove connector 1 or on a part of the outer surface of the double Locking housing 2, the control sleeve 3 is arranged, in the inner cylindrical surface of the upper seat 3 c for receiving the upper locking piece 6 acting in one direction, with the appropriate depth and shape Regelhilfskreisnut 3a, the Regelhauptkreisnut 3 b for partial inclusion of the upper movable locking piece 4 or the lower seat 3 d for receiving the lower locking piece 7 acting in one direction is provided.

The main circular groove 3 b is designed with a tapered shoulder at the top. To the lower end of the external groove fitting 1, the stop 1c is mounted with a thread.

To separate the interior of the equipment and the annulus of the well with regard to liquid and Expediently arranged seals 11, 12, 13 are provided for gas pressures.

The lower inner circle snut connection piece forms the lower main unit of the equipment, the outer circular groove connector 1 forms with all other mounted The upper main unit.

The device having the configuration and construction described above is shown in FIG Position before coupling or connecting the two

Main units shown.

Those at the lower end of the to be connected or coupled together Drilling, production or casing traveling column The upper main unit fastened by means of a screw thread is thus attached to the one on the connection point lower main unit connected so that their rotary claw shoulders slide into one another to the stop. By lowering the tubular column to be connected, an axial load is exerted on the upper unit. Under the action of the axial load, the outer circular groove connector 1 moves - within the main unit - Down, whereby the lower loosening circular groove 1 b with its upper conical shoulder the lower movable locking piece 5 moved radially outward.

The lower movable hold-open device, which is moved radially outwards: piece 5 is diverted from the lower circular groove 1 b into the inner circular groove 9 a of the inner circular groove connection piece 9 and holds it in this position with the cylindrical outer surface of the outer circular groove connection piece 1.

This position is shown in FIG. Simultaneously with the movement described above, this takes place in the Movement toothing 1 c of the outer circular groove connection piece 1 engaging upper locking piece holding in one direction 6 the control sleeve 3 with it. Together with the control sleeve, the lower one moves in one direction Locking piece 7 down so that it executes a radial resilient movement and on the counter-holder toothing circular groove 2 c slides along.

During the downward movement of the control sleeve 3 is through the upper tapered shoulder of the lower main circular groove 3 b the same moves the upper movable locking piece 4 in the radial direction in which it is to be confronted with the upper circular mounting groove 1 a, where it is then through the Jacket of the bore of the control sleeve 3 is supported. On the upper movable one that has moved into the new position Locking piece 4 strikes the upper shoulder of the upper one

Fastening circle groove 1 and holds the outer circle connector 1 in its downward movement. During this single downward release becomes the complete connection or the coupling the lower and upper main units.

In the well or in the drilling probe, tensile loads generally act on the device. For this reason it happens when you pull the outer circular groove connection piece 1 in the upward direction after the connection process, to a stop of the lower shoulder of the upper circular locking groove 1 on the upper movable locking piece 4. During this movement, the guide sleeve 3 remains in its previous position at the end of the downward movement lower position, because it engages in the counterholder toothing 2 c lower, in a Direction-acting locking piece 7 is prevented from moving upwards, while the upper one in one direction acting locking piece 6 performs a radially resilient movement on the movement toothing 1 c, so that the outer Circular groove connector can move upwards.

Must have a conveyor or well drilling device connected to the equipment below, e.g. casing hangers, packers, sealing plugs etc. or a fishing pin or a casing column for technological reasons or due to a technical accident, e.g. if it gets stuck, can be left in the well, the upper main unit the equipment with the tube column can be detached and removed. This position in the order of operations is shown in FIG. 3.

During the first phase of actuation, the outer circular groove connector 1 by means of those connected to the equipment above and reaching down to the surface of the earth Tube travel column or moved downwards by lowering it vertically. The outer circular groove connector 1 moves just down until the upper shoulder

the upper Feststellkreisnut 1 a on the upper movable locking piece 4 comes to rest. While his It takes movement through that in the movement interlocking

1 c engaging upper locking piece 6 acting in one direction with the control sleeve 3, the lower in one direction acting locking piece 7 executing a radial resilient movement on the counter-holder toothing

2 c slides down.

The direction of movement is then reversed and the outer circular groove connection piece is used in the second actuation phase 1 moved upwards until the lower shoulder of the upper Feststellkreisnut 1 a on the upper movable Locking piece 4 comes to rest. During this upward movement, the control sleeve 3 remains in its Lower position assumed during the previous actuation phase, because this is in the counter-holder toothing 2 c engaging in one direction lower locking piece 7 executes a radially resilient movement and the outer circular groove connector 1 in its upward movement does not prevent.

The one on the described upward and downward movement phase existing operating cycle is to be repeated until during the intermittent downward movement of the Control sleeve 3, the upper control auxiliary circular groove 3 a the upper movable locking piece 4 comes to face. As soon as the upper Regelhilfskreisnut 3 a the upper movable Locking piece 4 faces, moves the upper locking circle groove in the next upward movement phase 1 a with its lower conical shoulder, the upper movable locking piece 4 radially outwards and leads this into the upper auxiliary circular groove 3a. So that will the fixation between the double locking housing 2 and the Außenkreisnüt connector 1 canceled, so that the latter component can be moved further upwards.

The lower loosening circle groove 1 b enters one of the lower ones movable locking piece 5 opposite position,

while the stop 1 c the double locking housing achieved.

In this way all organs become the upper main unit forced to move upwards, including the lower movable locking piece 5, which is through the upper tapered shoulder of the inner circular locking groove 9 a moved radially inward and into the lower circular loosening groove 1 b is deflected and thereby the fixation of the double locking housing 2 and the inner circular groove connector 9 and at the same time the connection of the upper main unit and the lower main unit is canceled.

When the outer circular groove connection piece 1 is raised further, the device enters the extended position State in which the removal of the upper main unit shown separately in FIG. 3 is carried out the lower main unit, i.e. the inner circular groove fitting 9, in the well on the upper end of the drilling or production device or the casing column remains.

The number of release cycles described above is appropriate selected and is determined by the movement toothing 1 c, the counterholder toothing 2 c and the width "h" of the upper circular locking groove 1 a, i.e. by a multiple of the length of the single up and down movement.

If the upper main unit is reassembled, it can 1 installed again in the well and the connection with the lower main unit according to the already described connection process, after which the drilling, production, well training or fishing work can be continued with a connection that is fully adequate in terms of strength.

It should be noted here that the connection of the upper and lower main units can be carried out not only in the well, but also above ground. In this

lio

Trap is at the lower end of the device according to the invention any drilling, production, casing or well equipment to be installed in the well connected, while at its upper end the tube column that reaches to the surface of the earth is connected is.

After connecting the two main units above ground can the outer circle groove connection piece 1 with the double locking housing 2 by means of before installation in the well a suitably sized shear bolt secured to ground. The aim of this backup is that under action the alternating stress an undesired disengagement process does not start.

In connection with the multiple connection and disconnection or disengagement described, it should be mentioned that in the case when the outer circular groove connection piece 1 and the double locking housing 2 is connected by means of a shear bolt, the shear bolt in the first downward position = - movement phase of the connection and separation process must be sheared off by overloading, since the connection and the separation process does not begin until then.

Is that under the lower main unit of the device located tool clamped and one wishes with To carry out the rescue with a left-hand rescue rod for unscrewing, then one must also be used with the preceding one the same upper main unit has the connection and the first screwing apart to the left to undertake. The only change required in the upper main unit is that the upper connecting thread 1 θ of the outer circular groove connection piece 1 is designed as a left-hand thread.

Claims (5)

..ο F * ATENT «OfNW & LTE. ?. SHIP ν. FÜNER STREHL SCHÜBEL-HOPF EBBINGHAUS FINCK MARIAHILFPLATZ 2 & 3, MUNICH 9O POST ADDRESS: POSTBOX 95 O1 6O, D-800O MÖNCHEN 95 AS A PROFESSIONAL REPRESENTATIVE BEFORE THE EUROPEAN PATENT OFFICE • KARl. LUDWia SCHIFF (IO64-1E178) DIMI .. CHEM. OR. ALEXANDER V. FUNE-M DIPl .. INO. 1- "KTER STREHL OIPL. OtIPM. OR. URUUI-A SCHOFIF-I. MOCf DIPL. INC). DIETER EtIBINGHAUS DR. ING. DIETER FINCK TELEFON (089) 482054 TELEX 5-23 565 AURO D TELEGRAMME AUROMARCPAT. MÜNCHEN September 10th 1981 DEA - 22,263 CLAIMS 1. Device for drilling oil and gas wells as well for conveying from these, in particular connecting piece for deep drilling probes, with rotary claws, rotary bolts, stop and sealing elements, characterized by an upper and a lower one consisting of structural elements Main unit, which has an outer circular groove connection piece (1), an inner circular groove connection piece (9) and these are detachable connecting upper movable locking pieces (4), lower movable locking pieces (5) in a suitable number double locking housing (2), an upper one-way locking piece (6) and a lower in have one direction acting locking piece (7) and a control sleeve (3). 2. Apparatus according to claim 1, characterized by one in the outer cylindrical surface of the outer circular groove connection piece (1) for receiving the upper in one direction acting locking piece (6) provided movement toothing (1 c), one from each other in appropriate distance to accommodate the upper movable 2y Locking piece (4) provided fastening circular groove (1 a) and a circular loosening seam (1 "b) intended to accommodate the lower movable locking piece (5), whose shoulders, which come to rest against one another, are provided with a conical or "curved transition". 3. Apparatus according to claim 1 or 2, characterized in that in the inner jacket of the inner Circular groove connection piece (9) one for receiving the lower movable locking piece (5). serving at its upper shoulder is provided conical or arcuate inner circular groove. 4. Device according to one of claims 1 to 3 »thereby characterized in that in the double locking housing (2) to the upper side radially all around for receiving the upper movable locking piece (4) a row forming upper locking window (2 a), thereof at a certain distance from the lower end along a second circle radially to accommodate the lower movable one Locking piece (5) forming a row of lower locking windows (2 b) and continue to accommodate the lower one-way locking piece (7) in the. outer cylindrical surface counterholder teeth (2c) are provided. 5. Device according to one of claims 1 to 4, characterized in that inside Sheath of the control sleeve (3) at a mutually corresponding distance to accommodate the upper movable locking piece (4) an upper control circuit groove (3 a) and a lower main control circuit groove (3b) are formed, wherein the upper shoulder of the latter is conical or arched is designed to continue to lie in the jacket of its bore the upper end to receive the upper, acting in one direction locking piece (6) serving upper seat (3c) and the lower end lying a lower one serving to accommodate the lower one-way locking piece (7) Seat (3d) is formed. 03