RU2686793C1 - Downhole landing tool (versions) - Google Patents

Abstract

FIELD: oil and gas industry.SUBSTANCE: invention relates to production of oil and gas and can be used for movement, installation and extraction of well equipment. Borehole mounting tool comprises hollow housing with bore and ledge on inner cylinder, adapter and collet with inter-petal slots and collars on lobes for interaction with housing, barrel made with cylindrical ledge and guide cone and connected with adapter thread fixed with locking screw. In housing above bore there is internal thrust thread with direction opposite to thread screwing of downhole equipment. Collet is located on the shaft with possibility of longitudinal displacement restricted with an adapter. Collars on ends of petals of collet are made with thrust thread interacting with thrust thread of housing, and with inner chamfer interacting with cone made on upper part of protrusion of barrel, for expansion and reinforcement of engagement of threaded collars of collet for internal thrust thread of housing at lifting of downhole equipment. In the first version, the middle part of the barrel is made cone-shaped, providing compression of threaded collars of the collet when they pass into the internal thread of the housing until the protrusion of the barrel protrudes into the shoulder of the inner cylinder of the housing when landing the downhole equipment and engaging the threaded collars of the collet for the threaded thread of the housing, wherein barrel-like surface of the barrel has key ledges arranged in inter-petal grooves of collet to hold the collet from turning on the barrel while screwing the barrel with the adapter assembly from the case by rotating them in the opposite direction to screwing down the well equipment when removing them from the well. In compliance with second version threaded collars with collet lugs are arranged in lengthwise slots made in middle part of barrel with outlet to cone of protrusion of barrel and slope increasing depth of groove in direction of cone, which provides for compression of threaded collars of collet when they pass into internal thread of case. Thrust threads on collars of petals of collet and inside housing are made with trapezoidal profile.EFFECT: higher reliability of downhole landing tools.5 cl, 3 dwg

Description

The invention relates to the field of oil and gas and can be applied to move, install and retrieve downhole equipment.

A well-known universal downhole tool includes a hollow body with longitudinal slits and windows, inside which a spring-loaded stem is installed, which is connected to it through a pin, which is cut off under great force. A spring-loaded collet with petals located in longitudinal windows is installed outside the housing. Limiters collet located in the longitudinal slots of the housing. The rod is made with in-depth upper and lower boring. A free or spring-loaded bushing with a groove and a fixed ring on the lower bore are installed on the rod. On the limiter installed locking screws. The case has upper and lower through channels for pins, which are cut off with less effort. (Patent RU №2 114 978 C1. Universal well tool. - IPC: Е21В 23/00, Е21В 31/18. - 10.07.1998).

A device for lowering and retrieving downhole objects, comprising a hollow body with longitudinal slots and windows. A spring-loaded stem with a variable cross-section and a pin is installed inside the body; a spring-loaded collet with petals located in longitudinal windows is installed outside the body. In the longitudinal slots of the housing is placed the limiter collet. Inside the upper part of the body there are threaded plates installed with the possibility of longitudinal movement. The upper ends of the mentioned plates interact with the rod, and the lower ends are pivotally connected with spring-loaded cams, made with the possibility of arc movement. The upper end of the stem is connected to the bleed sleeve. The stem spring is located between the bleed collar and the upper end of the body. The stem pin is installed in the longitudinal slots of the housing above the spring of the collet. The body is made with the possibility of axial movement relative to the rod and the collet. The lower part of the stem can be rigidly connected with an additional stem. On an additional stock, spring-loaded interlocking levers with a safety gear are hinged. The spring is mounted on an additional stem between the inner levers. On the additional stock may be a safety device, made with a ribbed surface. (Patent RU №2 124 111 C1. A device for lowering and extracting borehole objects. - IPC: Е21В 23/00, Е21В 31/12, Е21В 31/18. - 12/27/1998).

A well-known hydraulic tool landing, consisting of a body, an adapter, a collet and a nut. The body is made with a boring under the collar on the petals of the collet and its depth is equal to the height of the collar. The boring is made stepwise with two ledges, and the boring of a smaller diameter - for sealing, and a larger diameter - for moving the piston with a cylindrical protrusion. The piston is made with a cylindrical protrusion and grooves under the shear screws on the ledge, and in the middle part under the petals of the collet with a depth equal to the height of the shoulders on the petals of the collet, and at the ends under the seals. A ball is placed in the upper end part of the piston and the inner chamfer is made. The case is connected to the adapter through a collet and fixed with a nut, made with a bore under the collet base. (Patent RU No. 2380 513 C1. Hydraulic landing tools. - IPC: Е21В 23/06, Е21В 33/12. - 01/27/2010). This invention is taken as a prototype.

A disadvantage of the known devices is the complexity of the design, lack of reliability, leading to a decrease in the efficiency of operation of wells.

The main objective of the invention is to simplify the design of the downhole planting tool, which increases the reliability of its work and the efficiency of operation of wells by reducing the cost of repair and maintenance of well equipment.

The technical result achieved by the claimed technical solutions is to simplify the design of borehole landing tools, increasing their reliability and well operation efficiency.

This technical result is achieved in that, in a borehole landing tool, in the first embodiment, comprising a hollow body with a bore and a shoulder on the inner cylinder, an adapter and a collet, made with interlobe grooves and shoulders at the ends of the petals to interact with the body, according to the proposed technical decision

the tool contains a barrel made with a cylindrical protrusion and a guide cone connected to the adapter thread fixed by a locking screw, and in the case above the bore there is an internal stop thread with a direction opposite to the threading of the downhole equipment, the collet is located on the barrel with the possibility of longitudinal displacement, limited adapter, and the shoulders at the ends of the petals of the collet are made with a stop thread that interacts with a stop thread of the case, and with an internal chamfer, mutually acting with a cone made on the upper part of the protrusion of the barrel to unclench and strengthen the hook of the threaded collars on the collet petals for the internal thrust thread of the housing when lifting the borehole equipment, the middle part of the barrel to its protrusion is conical to compress the threaded collars of the collet as they pass through internal thread of the housing up to the stop of the protrusion of the barrel into the step of the internal cylinder of the housing during the landing of downhole equipment and the engagement of the threaded shoulders of the collet for the stop thread Busan, wherein the tapered surface on the barrel formed key portions arranged in the slots of the collet interleaflet holding collet from rotating when screwing the barrel of the barrel with the adapter assembly from the housing by rotating them in the opposite direction of the screwing hole equipment when removing them from the well;

resistant thread on the collet collet and inside the body is made with a trapezoidal profile.

This technical result is achieved by the fact that, in a borehole landing tool, in the second embodiment, comprising a hollow body with a bore and a shoulder on the inner cylinder, an adapter and a collet, made with interlobe grooves and shoulders at the ends of the petals to interact with the body, according to the proposed technical solution

the tool contains a barrel made with a cylindrical protrusion and a guide cone connected to the adapter thread fixed by a locking screw, and in the case above the bore there is an internal stop thread with a direction opposite to the threading of the downhole equipment, the collet is located on the barrel with the possibility of longitudinal displacement, limited adapter, and the shoulders at the ends of the petals of the collet are made with a stop thread that interacts with a stop thread of the case, and with an internal chamfer, mutually acting with a cone made on the upper part of the protrusion of the barrel to unclench and strengthen the hook of the threaded shoulders on the petals of the collet for internal thrust threads of the housing when lifting downhole equipment, while the threaded shoulders with the collet petals are placed in the longitudinal grooves made in the middle part of the barrel with exit to the cone of the protrusion and depth, providing compression of the thread-like collet collet when they pass into the internal thread of the housing until it stops against the protrusion of the barrel into the step of the internal cylinder of the housing when the well is seated Nogo equipment and engaging rezboobraznyh turners thrust collet for threading the housing and the holding collet from rotating when screwing the barrel of the barrel with the adapter assembly from the housing by rotating them in the opposite direction of the screwing hole equipment when removing them from the well;

the grooves in the middle part of the barrel for threaded collars with collet lobes are made with an outlet to the cone of the protrusion of the barrel and a slope that increases the depth of the groove in the direction of the cone, which compresses the threaded flanges of the collet as they pass into the internal thread of the housing;

resistant thread on the collet collet and inside the body is made with a trapezoidal profile.

Conducted by the applicant's analysis of the level of technology has allowed to establish that the counterparts, characterized by a combination of features that are identical to all the characteristics of the stated options downhole landing tool, no. Therefore, the proposed technical solutions meet the condition of patentability "novelty."

Search results known solutions in this field of technology in order to identify signs that match the distinctive features of the prototype features of the proposed technical solutions, showed that they do not follow explicitly from the prior art. From the level of technology determined by the applicant, the influence of the transformations envisaged by the essential features of the proposed technical solutions to achieve the said technical result has not been revealed. Therefore, the proposed technical solutions meet the condition of patentability "inventive step".

The stated technical solutions can be implemented at the enterprises of mechanical engineering from well-known materials and the adopted technology and used in oil and gas wells. Therefore, the proposed technical solutions meet the condition of patentability "industrial applicability".

FIG. 1 schematically shows a first embodiment of a downhole landing tool in a detachable form; in fig. 2 - the same, in the collection; in fig. 3 - the same, the second variant of the execution of the downhole landing tool in a detachable form.

The downhole landing tool, in the first embodiment, contains an adapter 1, a barrel 2 connected to an adapter 1 by a thread fixed by a locking screw 3, and a hollow body 4. The barrel 2 is made with a cylindrical protrusion 5 and a guide cone 6. The body 4 is made with a bore 7 , ledge 8 and internal thrust thread 9, for example, left-handed thread with a trapezoidal profile, made above the bore 7 with the direction opposite to the right-hand thread of screwing downhole equipment. (Fig. 1). On the barrel 2 there is a collet 10 with shoulders 11 at the ends of the petals with the possibility of longitudinal displacement on the barrel 2 by the amount l, limited by adapter 1. The colts 11 of the collet 10 are made with a stop thread 12 that cooperates with a stop thread 9 of the housing 4, and with an inner face 13 interacting with a cone 14, made on the upper part of the protrusion 5 of the barrel 2 to unclench and enhance the engagement of the threaded shoulders 11 on the petals of the collet 10 for the internal stop thread 9 of the housing 4 when lifting the downhole equipment. (Fig. 2). The middle part of the barrel 2 to its protrusion 5 is tapered, providing compression of the threaded shoulders 11 of the collet 10 as they pass into the internal thread 9 of the housing 4 until the stop of the protrusion 5 of the barrel 2 into the ledge 8 of the internal cylinder of the housing 4 when landing borehole equipment and engaging the threaded shoulder of the collet 11 of the collet 10 for the stop thread 9 of the housing 4. On the tapered surface of the barrel 2 there are key lugs 15 placed in the interlobe grooves 16 of the collet 10, which hold the collet 10 from turning on the barrel 2 when screwing the barrel 2 with the adapter 1 into the collection e from the housing 4 by rotating them in the opposite direction to screwing downhole equipment when they are removed from the well.

Bo-second version of the borehole landing tool threaded shoulders 11 with petals of the collet 10 are located in the longitudinal grooves 17, made in the middle part of the barrel 2 with access to the cone 14 of the protrusion 5 with a depth that provides compression of the threaded shoulders 11 of the collet 10 when they pass into the internal thread 9 of the housing 4 until the stop of the protrusion 5 of the barrel 2 into the ledge 8 of the inner cylinder of the housing 4 when landing the downhole equipment and engaging the threaded shoulders 11 of the collet 10 for the stop thread 9 of the housing 4. (Fig. 3). The longitudinal grooves 17 keep the collet 10 from turning on the barrel 2 when screwing the barrel 2 with the adapter 1 in the assembly from the housing 4 by rotating them in the opposite direction to the screwing of the well equipment when they are removed from the well. The grooves 17 in the middle part of the barrel 2 under the threaded shoulders 11 with the petals of the collet 10 are made with a slope that increases the depth of the groove 17 in the direction of the cone 14 of the protrusion 5 of the barrel 2, which provides compression of the threaded shoulders 11 of the collet 10 as they pass into the internal thread 9 of the housing 4.

Downhole landing tool works as follows.

Before lowering the downhole equipment into the well, the well fitting tool is installed. To do this, the adapter 1 is screwed with the barrel 2 through the right-hand thread and fixed with a locking screw 3. Then the adapter 1 with the barrel 2 assembly is connected to the housing 4. To do this, the barrel 2 is pushed into the cavity of the housing 4 with the force P. At the same time, the collet 10 with the shoulders 11 at the ends of the petals, under the action of the efforts of resistance of the decompressed petals of the collet 10, the body 4 is displaced along the barrel 2 up to the stop into the adapter 1. The barrel 2 moves into the body 4 until the shoulder 5 of the barrel 2 protrudes into the ledge 8 of the inner cylinder of the body 4 and aligns the threaded shoulders 11 of the collet 10 seconds ornoy thread 9 in the housing 4, at which the compression of the collet 11 clamps rezboobraznyh 10 from contact with buttress thread 9 in the housing 4 to the engagement of their abutment thread 9 in the housing 4 by the strut. Then, as part of a packer or other borehole equipment, the downhole landing tool is lowered into the well. After working out certain actions, if necessary, the adapter 1 with the barrel 2 assembly is disconnected from the housing 4 by rotating them clockwise, preventing the well equipment from unscrewing, and removed from the well. When extracting borehole equipment from a well using a borehole planting tool, the collet 10 with the shoulders 11 at the ends of the petals under the influence of engaging them with the body 4 is displaced along the shaft 2 by an amount l, thereby strengthening the engagement of the threaded shoulders 11 of the collet 10 for the stop thread 9 in the body 4 by unclamping the reed-shaped shoulders 11 of the collet 10 due to the stop of the inner chamfer 13 on the thread-like shoulders 11 on the cone 14 of the upper part of the protrusion 5 of the barrel 2. After removing the well equipment from the well, the connector ka 1 on the barrel assembly 2 from the casing 4 by turning them clockwise.

Thus, the proposed options for downhole planting tools can improve the reliability and efficiency of the installation of packer and / or other downhole equipment, reduce their time and operating costs for well maintenance.

Claims (5)

1. Borehole landing tool containing a hollow body with a bore and a ledge on the inner cylinder, an adapter and a collet, made with interlobular grooves and shoulders at the ends of the petals to interact with the body, characterized in that the tool includes a barrel, made with a cylindrical protrusion and a guide cone connected to the adapter thread, fixed locking screw, and in the case above the bore made an internal stop thread with the direction opposite to the thread screwing downhole equipment at the same time, the collet is located on the barrel with the possibility of longitudinal displacement limited by the adapter, and the shoulders at the ends of the collet lobes are made with a stop thread that interacts with the stop thread of the body and with an internal facet that interacts with a cone made on the upper part of the protrusion of the barrel for unclamping and reinforcement of the hook of the thread-like shoulders on the petals of the collet for the internal thrust thread of the housing when lifting the borehole equipment, while the middle part of the barrel to its protrusion is tapered, providing squeezing the collet collets when they pass into the internal thread of the housing until the projection of the barrel protrudes into the ledge of the internal cylinder of the housing when planting downhole equipment and engaging the thread-like collets of the collet of the housing, while on the tapered surface of the trunk there are keyed protrusions located in the interlobular grooves that keep the collet from turning on the barrel while screwing the barrel with the adapter assembly from the body by rotating them in the opposite direction to screwing the well equipment when you remove them from the well. 2. The downhole landing tool according to Claim. 1, characterized in that the stop thread on the collet collet and inside the body is made with a trapezoidal profile. 3. Borehole landing tool containing a hollow body with a bore and a ledge on the inner cylinder, an adapter and a collet, made with interlobular grooves and shoulders at the ends of the petals to interact with the body, characterized in that the tool includes a barrel made with a cylindrical protrusion and a guide cone connected to the adapter thread, fixed locking screw, and in the case above the bore made an internal stop thread with the direction opposite to the thread screwing downhole equipment at the same time, the collet is located on the barrel with the possibility of longitudinal displacement limited by the adapter, and the shoulders at the ends of the collet lobes are made with a stop thread that interacts with the stop thread of the body and with an internal facet that interacts with a cone made on the upper part of the protrusion of the barrel for unclamping and reinforcement of the hook of the threaded shoulders on the petals of the collet for internal thrust threads of the housing when lifting downhole equipment, while the threaded shoulders with the petals of the collet are placed in the longitudinal grooves, you mediocre in the middle part of the barrel with an exit to the cone of a protrusion and a depth that ensures compression of threaded collet shoulders when they pass into the internal thread of the body until the shoulder of the trunk protrusion has reached the shoulder of the internal cylinder of the housing when landing the downhole equipment and engaging the threaded shoulder of the collet for the stop thread of the body the collet from turning on the barrel when screwing the barrel with an adapter assembled from the body by rotating them in the opposite direction to screwing the well equipment when removing them from the wells . 4. Borehole landing tool according to claim 3, characterized in that the grooves in the middle of the barrel for threaded shoulders with collet petals are made with an exit to the cone of the protrusion of the barrel and a slope that increases the depth of the groove in the direction of the cone, which compresses the thread-like shoulders of the collet during their passage into the internal thread of the housing. 5. Borehole landing tool according to claim 3, characterized in that the resistant thread on the collet collet and inside the body is made with a trapezoidal profile.

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